Liquid tank nitrogen removal device

Abstract

The utility model discloses a liquid tank nitrogen discharging device which comprises a liquid storage tank, the liquid storage tank is connected with a vaporizer, the vaporizer comprises a plurality of vertical pipes arranged in parallel, and a bent pipe is connected between every two adjacent vertical pipes; the water storage tank is arranged below the vaporizer and connected with a circulating water supply assembly used for conveying hot water, the upper portion of the water storage tank is communicated with an elastic bag capable of being folded or unfolded, a plurality of vertical pipes are arranged in the elastic bag, the upper end of the elastic bag is connected with a plurality of sleeves, and the vertical pipes are sleeved with the sleeves in a one-to-one correspondence mode. The upper ends of the sleeves are connected with scraping plates used for breaking ice, the multiple sleeves are jointly connected with a mounting rod, and a lifting assembly is arranged at one end of the mounting rod and used for driving the sleeves to reciprocate in the vertical direction. According to the liquid tank nitrogen discharging device of the structure, an ice layer of the vertical pipe can be removed, and the vaporization efficiency of liquid nitrogen heat exchange can be improved in a hot water circulation mode.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid nitrogen filling of ships, in particular to a liquid tank nitrogen discharge device. Background Art

[0002] During the construction of single-fuel powered ships, LNG fuel filling and commissioning stages are required to meet the on-site ship mooring test requirements. At present, LNG fuel filling is mostly carried out with nitrogen, and the main way to use nitrogen is to store liquid nitrogen in tanks. The discharge time of liquid nitrogen is long, especially in the winter when the temperature is low, the discharge time of liquid nitrogen will continue to be extended.

[0003] In order to improve the discharge time of liquid nitrogen, there is a method of using a vaporizer, which converts liquid nitrogen into gaseous nitrogen through air heat exchange. However, this method is easily affected by the external temperature, especially in the winter when the temperature is low, the heat exchange efficiency is slow, which leads to a slow efficiency of converting liquid nitrogen into gaseous nitrogen. In addition, when liquid nitrogen is vaporized in the vaporizer, it will absorb a large amount of heat from the surrounding air, causing the moisture in the air to condense on the vaporizer, especially when the nitrogen usage is high and the temperature is low in winter, the vaporizer will be covered with a thick layer of ice in a very short time, which further affects the vaporization effect of the vaporizer, and then affects the demand and supply of nitrogen. Utility Model Content

[0004] In view of the above shortcomings, the utility model proposes a liquid tank nitrogen discharge device, which can not only remove the ice layer of the vertical pipe, but also form a secondary heat exchange of liquid nitrogen through hot water circulation to accelerate the vaporization efficiency.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A liquid tank nitrogen discharge device comprises: a liquid storage tank, the liquid storage tank is connected to a vaporizer, the vaporizer comprises a plurality of vertical pipes arranged in parallel, a curved pipe is connected between two adjacent vertical pipes; a water storage tank, the water storage tank is arranged below the vaporizer, the water storage tank is connected to a circulating water supply component for conveying hot water, the upper part of the water storage tank is connected to a foldable or unfoldable elastic bag, a plurality of vertical pipes are built into the elastic bag, a plurality of sleeves are connected to the upper end of the elastic bag, the sleeves are sleeved on the outside of the vertical pipes one by one, a scraper for breaking ice is connected to the upper end of the sleeves, a plurality of the sleeves are commonly connected to a mounting rod, a lifting assembly is provided at one end of the mounting rod, and the lifting assembly is used to drive the sleeves to reciprocate in the vertical direction.

[0007] According to the liquid tank nitrogen discharge device of the embodiment of the utility model, at least the following beneficial effects are achieved: when in use, the liquid nitrogen in the liquid storage tank is transported to the vaporizer, so that the liquid nitrogen is filled in multiple vertical pipes and curved pipes. When the outside world is in the summer with a higher temperature, the sleeve is located at the lower part of the vertical pipe, and the liquid nitrogen is mainly heat exchanged by convection with the air, so that the liquid nitrogen can gradually absorb heat, thereby using the outside air temperature to reach the vaporization condition. When the outside world is in the winter with a lower temperature, the liquid nitrogen vaporization process easily causes the vertical pipe to produce an ice layer, and the lifting assembly drives the mounting rod to move up, so that the sleeve drives the scraper to scrape the ice layer of the vertical pipe upward, and then the elastic bag is unfolded to form a cavity that can accommodate multiple vertical pipes, and finally the circulating water supply assembly replenishes the water tank with hot water, so that the hot water is filled in the elastic bag, so that the liquid nitrogen is mainly heat exchanged by hot water, so that it can ensure that the liquid nitrogen vaporization efficiency can be maintained at a high level in winter, further shortening the time for the liquid tank to discharge nitrogen, and thus ensuring the demand and supply of nitrogen.

[0008] Furthermore, two scrapers are provided, and the two scrapers are spliced ​​together into a hollow truncated cone structure. The small end of the scraper is provided with a plurality of pointed protrusions, so that local pressure is applied by utilizing the plurality of pointed protrusions to quickly break the ice layer of the vertical pipe.

[0009] Furthermore, the sleeve is provided with a square portion extending along the radial direction of the vertical tube, the scraper is movably provided on the square portion, the square portion is threadedly connected with a bolt member, one end of the bolt member is provided with a limiting portion, an elastic member is provided between the limiting portion and the scraper, and the elastic member drives the scraper to press against the outer wall of the vertical tube.

[0010] Furthermore, the lifting assembly includes a motor, a screw and a slider, the screw is extended in the vertical direction, the motor is connected to the screw, the slider is threadedly engaged with the screw, the mounting rod is connected to the slider, and when the motor rotates, the slider drives the mounting rod to move in the vertical direction.

[0011] Furthermore, the mounting rod is a hollow tube connected to the elastic bag, the circulating water supply assembly includes a water tank, a heating wire is provided inside the water tank, the water tank is connected to the water tank via a third pipeline, the water tank is connected to a water pump, and one end of the water pump is connected to the hollow tube via a fourth pipeline.

[0012] Furthermore, it also includes a controller, the water tank is provided with a temperature sensor, the elastic bag is provided with a liquid level sensor, the third pipeline and the fourth pipeline are both provided with solenoid valves for switching on and off, and the temperature sensor, the liquid level sensor and the solenoid valve are all electrically connected to the controller.

[0013] Furthermore, it also includes a controller, a first pipeline is connected between the liquid storage tank and the vaporizer, the first pipeline is provided with a first switch valve, the vaporizer is connected with a second pipeline for connecting to the GVU valve box, the second pipeline is provided with a second switch valve, the second pipeline is provided with a return pipe connected to the liquid storage tank, the return pipe is provided with a third switch valve, the liquid storage tank is provided with a pressure sensor, and the pressure sensor, the first switch valve, the second switch valve and the third switch valve are all electrically connected to the controller.

[0014] Furthermore, the reflux pipe is connected to the upper end of the liquid storage tank, and the reflux pipe is provided with a one-way valve.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is a structural schematic diagram of an embodiment of a liquid tank nitrogen exhaust device of the utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the structure of the carburetor, sleeve and scraper assembly;

[0019] Figure 3 for Figure 1 A partial cross-sectional view of the vertical pipe, sleeve and scraper assembly.

[0020] In the figure: a liquid storage tank 100, a first pipeline 110, a first switch valve 120, a vaporizer 200, a vertical pipe 210, a bent pipe 220, a second pipeline 230, a second switch valve 240, a return pipe 250, a third switch valve 260, a water storage tank 300, an elastic bag 310, a sleeve 320, a square portion 321, a bolt member 322, a limit portion 323, an elastic member 324, a groove 325, a scraper 330, a tip protrusion 331, a mounting rod 340, a third pipeline 350, a motor 400, a screw rod 410, and a slider 420. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "inside", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0023] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If the terms "first" or "second" are described, they are only used for descriptive purposes and cannot be understood to indicate or imply relative importance.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figures 1 to 3 A liquid tank nitrogen discharge device comprises: a liquid storage tank 100 and a water storage tank 300, wherein the liquid storage tank 100 is connected to a vaporizer 200, the vaporizer 200 comprises a plurality of vertical pipes 210 arranged in parallel, and a curved pipe 220 is connected between two adjacent vertical pipes 210; the water storage tank 300 is arranged below the vaporizer 200, and is connected to a circulating water supply component for conveying hot water; a foldable or unfoldable elastic bag 310 is communicated with the upper part of the water storage tank 300, a plurality of vertical pipes 210 are built in the elastic bag 310, a plurality of sleeves 320 are connected to the upper end of the elastic bag 310, the sleeves 320 are sleeved on the outside of the vertical pipes 210 one by one, a scraper 330 for breaking ice is connected to the upper end of the sleeves 320, and a plurality of sleeves 320 are commonly connected to a mounting rod 340, and a lifting assembly is provided at one end of the mounting rod 340, and the lifting assembly is used to drive the sleeves 320 to reciprocate in the vertical direction.

[0026] When the liquid tank nitrogen discharge device of the above structure is in use, the liquid nitrogen in the liquid storage tank 100 is transported to the vaporizer 200, so that the liquid nitrogen fills the plurality of vertical pipes 210 and the curved pipes 220. When the outside temperature is high in summer, the sleeve 320 is located at the lower part of the vertical pipe 210. At this time, the liquid nitrogen mainly exchanges heat with the air through convection, so that the liquid nitrogen can gradually absorb heat, thereby using the outside air temperature to achieve vaporization conditions. When the outside temperature is low in winter, the vaporization process of liquid nitrogen easily causes an ice layer to form on the vertical pipe 210. The lifting assembly drives the mounting rod 340 to move upward, so that the sleeve 320 drives the scraper 330 to scrape the ice layer on the vertical pipe 210 upward. Then the elastic bag 310 is unfolded to form a cavity that can accommodate multiple vertical pipes 210. Finally, the circulating water supply assembly replenishes hot water into the water storage tank 300, so that the hot water fills the inside of the elastic bag 310, so that the liquid nitrogen is mainly heat-exchanged by the hot water, thereby ensuring that a high vaporization efficiency can be maintained even in winter, further shortening the nitrogen discharge time of the liquid tank, and ensuring the demand and supply of nitrogen.

[0027] See also Figure 2 and Figure 3 , further, there are two scrapers 330, and the two scrapers 330 are spliced ​​together to form a hollow truncated cone structure, and the small end of the scraper 330 is provided with a plurality of pointed protrusions 331, so that the plurality of pointed protrusions 331 are used to apply local pressure to quickly break the ice layer of the vertical pipe 210. Among them, the outer wall of the scraper 330 forms an inclined surface for diversion, so that the broken ice can be separated from the vertical pipe 210 along the inclined surface. It can be understood that the elastic bag 310 includes a plurality of folded edges connected end to end, and when the sleeve 320 moves, the plurality of folded edges overlap or unfold with each other in the vertical direction. During assembly, the upper end of the elastic bag 310 is connected to the outer peripheral wall of the plurality of sleeves 320 to form an opening, and the elastic bag 310 between two adjacent sleeves 320 can be connected by needle and suture, so as to close the opening as much as possible, which is conducive to reducing the heat loss of the hot water added later. In some embodiments, the inner wall of the elastic bag 310 is adhered with a heat preservation layer, so as to further reduce the heat loss.

[0028] See also Figure 2 and Figure 3Further, the sleeve 320 is provided with a square portion 321 extending along the radial direction of the vertical tube 210, and the scraper 330 is movably provided on the square portion 321. The square portion 321 is threadedly connected with a bolt member 322. One end of the bolt member 322 is provided with a limit portion 323. An elastic member 324 is provided between the limit portion 323 and the scraper 330. The elastic member 324 drives the scraper 330 to press against the outer wall of the vertical tube 210. Specifically, the scraper 330 is provided with a square hole for the square portion 321 to pass through, and the square portion 321 is provided with a thread groove that is threadedly matched with the bolt member 322. During installation, the square portion 321 is passed through the square hole, so that the scraper 330 can only move relative to the square portion 321, and then the bolt member 322 is screwed into the thread groove, and the elastic member 324 can press against the scraper 330. Finally, the scraper 330 is always pressed against the outer wall of the vertical tube 210 under the action of the elastic member 324. It is understandable that the elastic member 324 can be made of a spring, or other elastically deformable materials such as rubber or plastic.

[0029] See also Figure 1 , further, the lifting assembly includes a motor 400, a screw rod 410 and a slider 420, the screw rod 410 is extended in the vertical direction, the motor 400 is connected to the screw rod 410, the slider 420 is threadedly matched with the screw rod 410, the mounting rod 340 is connected to the slider 420, and when the motor 400 rotates, the slider 420 drives the mounting rod 340 to move in the vertical direction. Specifically, when in use, the motor 400 drives the screw rod 410 to rotate, so that the slider 420 moves along the length direction of the screw rod 410 under the action of the thread, so that the mounting rod 340 drives multiple sleeves 320 to move upward at the same time, and finally drives the corresponding scraper 330 to break the ice layer of the corresponding vertical pipe 210 upward. In some embodiments, the lifting assembly can also adopt a method of winding a suspension rope with a fixed pulley, or adopt a cylinder to drive the mounting rod 340 to move up or down, which will not be described in detail.

[0030] See also Figure 3 , further, the mounting rod 340 is a hollow tube connected to the elastic bag 310, the circulating water supply assembly includes a water tank, a heating wire is provided inside the water tank, the water tank 300 is connected to the water tank through the third pipeline 350, the water tank is connected to a water pump, and one end of the water pump is connected to the hollow tube through the fourth pipeline. Specifically, when in use, when it is necessary to fill the elastic bag 310 with hot water, the water in the water tank is heated by the heating wire, and the water pump replenishes the hot water to the hollow tube, so that the hot water can fall along the outer wall of the vertical pipe 210, and finally replenished in the elastic bag 310 and the water tank 300, and finally the water in the water tank 300 flows back to the water tank through the third pipeline 350, thereby completing the recycling of hot water. It can be understood that the sleeve is provided with a groove 325 connected to the hollow tube, so that the hot water can flow into the interior of the elastic bag 310 through the groove.

[0031] Furthermore, a controller is also included, the water tank 300 is provided with a temperature sensor, the elastic bag 310 is provided with a liquid level sensor, the third pipeline 350 and the fourth pipeline are provided with a solenoid valve for opening and closing, and the temperature sensor, the liquid level sensor and the solenoid valve are electrically connected to the controller. Specifically, when the temperature sensor detects that the temperature of the water tank 300 is lower than the set temperature, the controller controls the solenoid valve located in the third pipeline 350 to operate, so that the water in the water tank 300 can flow back to the water tank for reheating, and the heated hot water continues to be replenished in the elastic bag 310 through the fourth pipeline. Among them, when the liquid level sensor detects that the water level of the elastic bag 310 is higher than the set value, the controller closes the solenoid valve located in the fourth pipeline, and then opens the third pipeline 350 so that part of the water can flow back to the water tank. It can be understood that in order to regulate the flow direction of water, the third pipeline 350 and the fourth pipeline are provided with a one-way valve to prevent water from flowing back. The controller can use a PLC chip or input program to control the valve.

[0032] See also Figure 1 , further, it also includes a controller, a first pipeline 110 is connected between the liquid storage tank 100 and the vaporizer 200, the first pipeline 110 is provided with a first switch valve 120, the vaporizer 200 is connected with a second pipeline 230 for connecting to the GVU valve box, the second pipeline 230 is provided with a second switch valve 240, the second pipeline 230 is provided with a reflux pipe 250 connected to the liquid storage tank 100, the reflux pipe 250 is provided with a third switch valve 260, the liquid storage tank 100 is provided with a pressure sensor, and the pressure sensor, the first switch valve 120, the second switch valve 240 and the third switch valve 260 are all electrically connected to the controller. Specifically, when in use, the first switch valve 120 is opened first, and the second switch valve 240 and the third switch valve 260 are closed, so that the liquid nitrogen in the liquid storage tank 100 can be filled in the multiple vertical pipes 210 and the curved pipe 220 by the internal pressure of the liquid storage tank 100, and then the liquid nitrogen is waited to be vaporized to form gaseous nitrogen, and finally the second switch valve 240 is opened, so that the gaseous nitrogen can be output to the GVU valve box through the second pipeline 230. Among them, when the pressure in the liquid storage tank 100 is lower than the discharge pressure of the liquid nitrogen, the third switch valve 260 can be opened to allow part of the gaseous nitrogen to be supplemented in the liquid storage tank 100, thereby increasing the internal pressure of the liquid storage tank 100 so that the liquid storage tank 100 can continue to output liquid nitrogen.

[0033] Furthermore, the reflux pipe 250 is connected to the upper end of the liquid storage tank 100, and a one-way valve is provided on the reflux pipe 250 to prevent liquid nitrogen from backflowing into the reflux pipe 250, thereby ensuring that the liquid nitrogen in the liquid storage tank 100 can be converted into gas for transportation.

[0034] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A liquid tank nitrogen exhaust device, characterized in that: include: A liquid storage tank (100), wherein the liquid storage tank (100) is connected to a vaporizer (200), wherein the vaporizer (200) comprises a plurality of vertical pipes (210) arranged in parallel, and a bent pipe (220) is connected between two adjacent vertical pipes (210); A water tank (300), the water tank (300) is arranged below the vaporizer (200), the water tank (300) is connected to a circulating water supply component for conveying hot water, the upper part of the water tank (300) is connected to a foldable or unfoldable elastic bag (310), a plurality of vertical pipes (210) are built in the elastic bag (310), the upper end of the elastic bag (310) is connected to a plurality of sleeves (320), the sleeves (320) are sleeved on the outside of the vertical pipes (210) in a one-to-one correspondence, the upper end of the sleeve (320) is connected to a scraper (330) for breaking ice, the plurality of sleeves (320) are commonly connected to a mounting rod (340), one end of the mounting rod (340) is provided with a lifting assembly, the lifting assembly is used to drive the sleeve (320) to reciprocate in a vertical direction.

2. A liquid tank nitrogen discharge device according to claim 1, characterized in that: Two scrapers (330) are provided, and the two scrapers (330) are spliced ​​together to form a hollow truncated cone-shaped structure. The small end of the scraper (330) is provided with a plurality of pointed protrusions (331).

3. A liquid tank nitrogen discharge device according to claim 1, characterized in that: The sleeve (320) is provided with a square portion (321) extending along the radial direction of the vertical tube (210); the scraper (330) is movably provided on the square portion (321); the square portion (321) is threadedly connected with a bolt member (322); a limiting portion (323) is provided at one end of the bolt member (322); an elastic member (324) is provided between the limiting portion (323) and the scraper (330); the elastic member (324) drives the scraper (330) to press against the outer wall of the vertical tube (210).

4. A liquid tank nitrogen discharge device according to claim 1, characterized in that: The lifting assembly comprises a motor (400), a screw rod (410) and a slider (420); the screw rod (410) is extended in a vertical direction; the motor (400) is connected to the screw rod (410); the slider (420) is threadedly matched with the screw rod (410); the mounting rod (340) is connected to the slider (420); when the motor (400) rotates, the slider (420) drives the mounting rod (340) to move in a vertical direction.

5. The liquid tank nitrogen discharge device according to claim 1, characterized in that: The mounting rod (340) is a hollow tube connected to the elastic bag (310); the circulating water supply assembly comprises a water storage tank, a heating wire is provided inside the water storage tank, the water storage tank (300) is connected to the water storage tank via a third pipeline (350), the water storage tank is connected to a water pump, and one end of the water pump is connected to the hollow tube via a fourth pipeline.

6. A liquid tank nitrogen discharge device according to claim 5, characterized in that: It also includes a controller, the water storage tank (300) is provided with a temperature sensor, the elastic bag (310) is provided with a liquid level sensor, the third pipeline (350) and the fourth pipeline are both provided with electromagnetic valves for switching on and off, and the temperature sensor, the liquid level sensor and the electromagnetic valve are all electrically connected to the controller.

7. The liquid tank nitrogen discharge device according to claim 1, characterized in that: The invention also comprises a controller, wherein a first pipeline (110) is connected between the liquid storage tank (100) and the vaporizer (200), the first pipeline (110) is provided with a first switch valve (120), the vaporizer (200) is connected with a second pipeline (230) for connecting with a GVU valve box, the second pipeline (230) is provided with a second switch valve (240), the second pipeline (230) is provided with a return pipe (250) connected to the liquid storage tank (100), the return pipe (250) is provided with a third switch valve (260), the liquid storage tank (100) is provided with a pressure sensor, and the pressure sensor, the first switch valve, the second switch valve (240) and the third switch valve (260) are all electrically connected to the controller.

8. A liquid tank nitrogen discharge device according to claim 7, characterized in that: The reflux pipe (250) is connected to the upper end of the liquid storage tank (100), and the reflux pipe (250) is provided with a one-way valve.

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