Low-temperature large double-layer liquid ammonia storage tank system

Abstract

The invention discloses a low-temperature large double-layer liquid ammonia storage tank system which comprises a storage tank used for storing liquid ammonia, the storage tank comprises a flat-top inner tank made of low-temperature steel and a vault-top outer tank made of Q235 carbon steel, and the inner tank is arranged in the outer tank; the pre-cooling mechanism is arranged on the body of the storage tank and comprises a spraying pipe, the spraying pipe is fixedly arranged in the inner tank, spraying heads distributed at equal intervals are arranged on the spraying pipe, the spraying heads spray liquid ammonia through atomization so as to pre-cool the interior of the inner tank, the interior of the spraying pipe is communicated with a liquid inlet pipe in a penetrating mode, and the liquid inlet pipe is communicated with the liquid inlet pipe in a penetrating mode. The liquid inlet pipe is divided into two sections, relates to the technical field of low-temperature storage tanks, and solves the problems that when an existing low-temperature double-layer liquid ammonia storage tank is used, the storage cost is increased due to the fact that precooling is conducted through a precooling pipeline and cold storage liquid, meanwhile, the heat preservation performance of the precooling pipeline is reduced, gaps of the precooling pipeline are large, and the provided protection performance is poor.

Description

Technical Field

[0001] The invention relates to the technical field of cryogenic storage tanks, and in particular to a low-temperature large-scale double-layer liquid ammonia storage tank system. Background Art

[0002] When the existing liquid ammonia storage tank is in use, the pressure storage condition of the tank body often depends on the side wall structure of the tank body. Generally, it is a thickened single-layer structure, which will increase the mass of the tank body. A low-temperature double-layer liquid ammonia storage tank with application number CN202221609274.7 includes a liquid ammonia storage tank body and a pre-cooling device to ensure the stability of the inner tank body and the outer tank body. The setting of the pre-cooling device ensures the stability between adjacent transverse reinforcement frames and the pre-cooling treatment of the tank body.

[0003] Although the device has the above advantages, it still has the following defects in actual use:

[0004] 1) The device precools the inner tank by allowing the cold storage liquid to flow inside the precooling pipe system. This method requires the use of additional cold storage liquid, resulting in an increase in the actual storage cost;

[0005] 2) The device can only play the role of pre-cooling and side protection through the preset pre-cooling pipe. On the one hand, the pre-cooling pipe has good heat transfer performance during storage, resulting in reduced insulation effect. On the other hand, the gap between the pre-cooling pipes is large, and the protection performance provided is poor;

[0006] Therefore, it is necessary to solve the problems that still exist in existing cryogenic storage tanks. Summary of the invention

[0007] In view of the shortcomings of the prior art, the present invention provides a low-temperature large-scale double-layer liquid ammonia storage tank system, which solves the problem that when the existing low-temperature double-layer liquid ammonia storage tank is used, pre-cooling through pre-cooling pipes and cold storage liquid increases the storage cost, and at the same time the pre-cooling pipe reduces the thermal insulation performance, and the gap between the pre-cooling pipes is large, providing poor protection performance.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: A low-temperature large double-layer liquid ammonia storage tank system, comprising:

[0009] A storage tank for storing liquid ammonia, the storage tank comprising a flat-top inner tank made of low-temperature steel and a dome-type outer tank made of Q235 carbon steel, the inner tank being arranged inside the outer tank;

[0010] A precooling mechanism, the precooling mechanism is arranged on the body of the storage tank, the precooling mechanism includes a spray pipe, the spray pipe is fixed inside the inner tank, the spray pipe is provided with nozzles arranged at equal intervals, the nozzles spray liquid ammonia by atomization to precool the inside of the inner tank, the inside of the spray pipe is connected with a liquid inlet pipe, the liquid inlet pipe is divided into two sections, one section of the liquid inlet pipe body is fixedly connected with the dome of the outer tank;

[0011] A plug-in assembly, which is disposed between the ends of the two sections of the liquid inlet pipes that are connected to each other, and is used for connecting the inside of the liquid inlet pipes to feed liquid ammonia;

[0012] The fixing assembly is arranged inside the outer tank and is used to fix the inner tank.

[0013] Preferably, another section of the liquid inlet pipe has a flat top cover slidably connected to its outer surface, the flat top cover is fixedly connected to the dome of the outer tank via a hanging rod, the flat top cover is movably connected to the tank mouth of the inner tank, a one-way valve is fixedly connected to the body of the flat top cover, the interior of the one-way valve is respectively connected to the interior of the inner tank and the outer tank, a cotton board is fixedly connected to the outer surface of the flat top cover, a ring beam is provided below the flat top cover, the outer surface of the ring beam is fixedly connected to the interior of the outer tank, the outer surface of the ring beam is movably connected to the bottom of the inner tank, and a filling plate is filled between the outer surface of the ring beam and the interior of the outer tank.

[0014] Preferably, the plug-in assembly includes a sleeve, the body of the sleeve is provided with two through holes, the outer surface of one section of the liquid inlet pipe is slidably connected to the inside of the through hole on one side, and one end of the other section of the liquid inlet pipe is threadedly connected to the inside of the through hole on the other side, the interior of the sleeve is fixedly connected to a hollow plate, the outer surface of the hollow plate is fixedly connected to a spring rod, the output end of the spring rod is fixedly connected to a blocking ball, and the outer surface of the blocking ball is movably connected to the inside of the through hole on one side and one end of one section of the liquid inlet pipe, respectively.

[0015] Preferably, the interior of the sleeve is slidably connected to a sliding sleeve, the body of the sliding sleeve is fixedly connected to the outer surface of one section of the liquid inlet pipe, the interior of the sleeve is fixedly connected to a sealing ring, the sealing ring is sleeved on the outside of one section of the liquid inlet pipe, and the outer surface of the sealing ring is movably connected to the outer surface of the sleeve.

[0016] Preferably, the fixing assembly includes a square frame, a screw rod is fixedly connected to the outer surface of the screw rod, a screw sleeve is fixedly connected to the outer surface of the screw rod, the outer surface of the screw sleeve is embedded and fixedly connected to the outer surface of the ring beam, a slide plate is slidably connected to the inside of the square frame, a sleeve is clamped on the outer surface of the slide plate, the outer surface of the sleeve is fixedly connected to the outer surface of the inner tank, a magnetic plate is fixedly connected to the inside of the sleeve, and the magnetic plate is movably connected to the slide plate through magnetic adsorption.

[0017] Preferably, a sliding groove is provided on the outer surface of the slide plate, a slider is slidably connected to the inside of the sliding groove, the outer surface of the slider is fixedly connected to the inside of the frame, a sliding rod is slidably connected through the body of the slider, the outer surface of the sliding rod is fixedly connected to the inside of the sliding groove, a compression spring is sleeved on the outer surface of the sliding rod, and the two ends of the compression spring are respectively fixedly connected to the outer surface of the slider and the inside of the sliding groove.

[0018] Preferably, a side guard unit is provided on the outside of the square frame, and the side guard unit includes a fixing strip, the outer surface of the fixing strip is fixedly connected to the inside of the outer tank, the outer surface of the fixing strip is provided with a card slot, the inside of the card slot is carded with a card strip, the outer surface of the card strip is fixedly connected to a side panel, the outer surface of the side panel is movably connected to the outer surface of the inner tank, the outer surface of the side panel is movably connected to an insulation board, and the outer surface of the insulation board is movably connected to the outer surface of the ring beam.

[0019] Preferably, the outer surface of the side panel is fixedly connected to a groove plate, the outer surface of the groove plate is clamped with a push bar, the outer surface of the push bar is fixedly connected to an arc plate, the outer surfaces of the arc plate are movably connected to the outer surfaces of the inner tank and the insulation plate respectively, the outer surface of the arc plate is provided with a groove, the inside of the groove is movably connected to the outer surfaces of the frame and the sleeve respectively.

[0020] Beneficial Effects

[0021] The present invention provides a low-temperature large double-layer liquid ammonia storage tank system. Compared with the prior art, it has the following beneficial effects:

[0022] (1) By setting up a pre-cooling mechanism, a small amount of liquid ammonia is first sprayed inside the inner tank for pre-cooling by using a liquid inlet pipe, a spray pipe and a spray head. This not only plays a pre-cooling role, but also does not require additional expenses, thereby reducing storage costs. In addition, the combination of cotton boards, ring beams and filling boards improves the insulation effect of the upper and lower parts of the inner tank.

[0023] (2) By providing a plug-in assembly, a section of the liquid inlet pipe is passed into the sleeve to abut against the blocking ball, so that the liquid inlet pipes at both ends are connected, which can facilitate a small amount of liquid nitrogen to enter the inner tank for pre-cooling. At the same time, the plug-in connection is also convenient for disassembly, so as to facilitate the installation or replacement of internal components.

[0024] (3) By setting up a fixing component and utilizing the connection between the screw rod and the threaded sleeve, the slide plate can be relatively fixed in place. At the same time, the radial and longitudinal positioning of the inner tank can be achieved by utilizing the clamping connection between the slide plate and the clamping sleeve. This makes it easier to use and fix inner tanks of different specifications, thereby improving the stability of the inner tank and the scope of use of the device.

[0025] (4) By setting up the side protection unit and utilizing the combination of the card strip and the card slot, it is easy to replace the side panels of different sizes to adapt to the side protection of inner tanks of different specifications. At the same time, by utilizing the overlap of the arc plate and the insulation plate, the side protection of the inner tank is enhanced, and the insulation effect of the side of the inner tank is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional diagram of the internal structure of the present invention;

[0027] Figure 2 A three-dimensional diagram of the external structure of the flat top cover of the present invention;

[0028] Figure 3 A three-dimensional diagram of the internal structure of the sleeve of the present invention;

[0029] Figure 4 The external structure stereogram of the arc plate of the present invention;

[0030] Figure 5 It is a three-dimensional diagram of the external structure of the skateboard of the present invention.

[0031] In the figure: 1, outer tank; 2, inner tank; 3, spray pipe; 4, nozzle; 5, liquid inlet pipe; 6, plug-in assembly; 61, sleeve; 62, through hole; 63, hollow plate; 64, spring rod; 65, ball plug; 66, sliding sleeve; 67, sealing ring; 7, flat top cover; 8, fixing assembly; 81, frame; 82, side guard unit; 821, fixing strip; 822, slot; 823, clip strip; 824, side panel; 825, insulation panel; 826, groove panel; 827, stop bar; 828, arc panel; 829, groove; 83, screw rod; 84, screw sleeve; 85, slide plate; 86, ferrule; 87, magnetic plate; 88, slide groove; 89, slider; 810, slide bar; 811, compression spring; 9, one-way valve; 10, cotton board; 11, ring beam; 12, filling plate; 13, hanging rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-5 The present invention provides a technical solution: a low-temperature large double-layer liquid ammonia storage tank system:

[0034] Embodiment 1: Refer to the attached manual Figure 1 , Attachment Figure 2 ;

[0035] The utility model comprises a storage tank, which is composed of an outer tank 1 and an inner tank 2. The inner tank 2 is provided with a plurality of specifications of different thicknesses, which are replaced according to actual storage needs. A nitrogen filling protection system is provided on the outer side of the arch of the outer tank 1. When the pressure drops to a certain level, nitrogen is supplemented to prevent the pressure of the storage tank from being too low. Oxygen and ammonia content detection systems are provided on both the inner and outer sides of the arch of the outer tank 1, which are respectively used to detect whether there is leakage inside the inner tank 2 and whether the ammonia nitrogen replacement is qualified. A feeding pipe is provided on the arch and inserted into the lower part of the inner tank 2 for normal feeding of liquid ammonia. The inner tank 2 is set inside the outer tank 1, and the inner tank 2 can be provided with temperature sensors arranged equidistantly up and down, as well as a liquid level gauge and a pressure gauge. The force sensor, the inner tank 2 is a flat-top tank body made of low-temperature steel, the outer tank 1 is a dome-type tank body made of Q235 carbon steel, and a precooling mechanism is arranged on the body of the storage tank. The precooling mechanism includes a spray pipe 3. The spray pipe 3 can be annular and multiple spray pipes 3 are evenly arranged inside the inner tank 2, and the upper and lower spray pipes 3 are connected in series with each other. The spray pipe 3 is fixed inside the inner tank 2, and the inside of the spray pipe 3 is connected through a nozzle 4. The nozzle 4 can spray liquid ammonia evenly inside the inner tank 2 to achieve precooling of the inner tank 2. Multiple nozzles 4 are evenly arranged on the spray pipe 3, and the inside of the spray pipe 3 is connected through a liquid inlet pipe 5. The liquid inlet pipe 5 is set to a standard specification and is located at the upper section. The outer end of the liquid inlet pipe 5 can be provided with a valve for closing, and a plurality of through strip grooves are provided at the inner end to facilitate the flow of liquid ammonia. The liquid inlet pipe 5 is divided into two sections, wherein the body of one section of the liquid inlet pipe 5 is fixedly connected to the dome of the outer tank 1, and the outer surface of the other section of the liquid inlet pipe 5 is slidably connected to a flat top cover 7, and the flat top cover 7 realizes the sealing effect on the opening of the inner tank 2. The outer surface of the flat top cover 7 is fixedly connected to the dome of the outer tank 1 through a hanging rod 13, and the outer surface of the flat top cover 7 is movably connected to the tank mouth of the inner tank 2. The body of the flat top cover 7 is fixedly connected to a one-way valve 9, which is convenient for balancing the air pressure inside the inner tank 2 during precooling. The inside of the one-way valve 9 is respectively connected to the inner tank 2 and the outer tank 2. The interior of the tank 1 is interconnected, and a cotton board 10 is fixedly connected to the outer surface of the flat top cover 7. The cotton board 10 is made of glass wool to improve the thermal insulation performance. A ring beam 11 is arranged under the flat top cover 7. The ring beam 11 is cast by mixing perlite and concrete, and is in the shape of a spiral disk (similar to the shape of a mosquito coil). It can not only support the inner tank 2 of different specifications, but also play a role in thermal insulation. The outer surface of the ring beam 11 is fixedly connected to the interior of the outer tank 1, and the outer surface of the ring beam 11 is movably connected to the bottom of the inner tank 2. A filling plate 12 is filled between the outer surface of the ring beam 11 and the interior of the outer tank 1. The filling plate 12 is made of foam glass to play a role in reducing load, sealing and thermal insulation.

[0036] In this embodiment, an inner tank 2 of required specifications is selected and placed inside the outer tank 1, supported by a ring beam 11, and insulated by the ring beam 11, a filling plate 12, a flat top cover 7 and a cotton board 10. Then, a small amount of liquid ammonia is fed into the interior of the spray pipe 3 through the liquid inlet pipe 5, and is evenly sprayed into the interior of the inner tank 2 through the nozzle 4 to achieve internal precooling. The air pressure inside the inner tank 2 and the outer tank 2 is balanced by using a one-way valve 9, and the pressure is supplemented by an external nitrogen filling device. Then, after precooling, a large amount of liquid ammonia can be added to the interior of the inner tank 2 for storage.

[0037] Embodiment 2: Based on Embodiment 1, refer to the attached Figure 1 , Attachment Figure 3 ;

[0038] A plug-in assembly 6 is provided between the two sections of the liquid inlet pipe 5. The plug-in assembly 6 includes a sleeve 61. The body of the sleeve 61 is provided with two through holes 62. The outer surface of one section of the liquid inlet pipe 5 is slidably connected to the inside of the through hole 62 on one side, and one end of the other section of the liquid inlet pipe 5 is threadedly connected to the inside of the through hole 62 on the other side. The threaded connection facilitates the disassembly of the sleeve 61. The interior of the sleeve 61 is fixedly connected with a hollow plate 63, which plays a supporting and transparent role. The outer surface of the hollow plate 63 is fixedly connected with a spring rod 64. The spring rod 64 facilitates the resetting of the blocking ball 65 through elastic force. The output end of the spring rod 64 is fixedly connected with a blocking ball 65. The blocking ball 65 is made of a material that is pressure-resistant, wear-resistant, low-temperature-resistant and has good sealing properties. By closing the upper through hole 62, the interior of the lower section of the liquid inlet pipe 5 is closed. The outer surfaces of the blocking ball 65 are movably connected to the interior of the through hole 62 on one side and one end of one section of the liquid inlet pipe 5. The interior of the sleeve 61 is slidably connected with a sliding sleeve 66. The sliding sleeve 66 is made of a material with good sealing and pressure resistance, which improves the sealing and force-bearing properties of the connection between the upper liquid inlet pipe 5 and the sleeve 61. The body of the sliding sleeve 66 is fixedly connected to the outer surface of one section of the liquid inlet pipe 5. The interior of the sleeve 61 is fixedly connected with a sealing ring 67, which can further improve the sealing of the connection. The sealing ring 67 is sleeved on the outside of one section of the liquid inlet pipe 5, and the outer surface of the sealing ring 67 is movably connected to the outer surface of the sleeve 61.

[0039] In this embodiment, when the inner tank 2 is placed inside the outer tank 1, the dome of the outer tank 1 is capped. When the dome drives the upper liquid inlet pipe 5 to descend, the inner end of the upper liquid inlet pipe 5 slides into the interior of the sleeve 61 through the upper through hole 62, and by abutting against the blocking ball 65, the blocking ball 65 is pressed downward to disengage it from the blockage of the upper through hole 62. Then, liquid ammonia can pass through the upper liquid inlet pipe 5, the strip groove, the sleeve 61 and the hollow part of the hollow plate 63, and enter the interior of the lower liquid inlet pipe 5 for feeding and spraying.

[0040] Embodiment 3: Based on Embodiment 2, refer to the attached Figure 1 , Attachment Figure 5 ;

[0041] A fixing assembly 8 is arranged on the outside of the flat top cover 7, and the fixing assembly 8 includes a square frame 81. A screw rod 83 is fixedly connected to the outer surface of the square frame 81. The screw rod 83 is a standard part. A screw sleeve 84 is fixedly connected to the outer surface of the screw rod 83. The screw sleeve 84 is a standard part. A plurality of screw sleeves are arranged in a row at equal distances along the radius of the ring beam 11, and a plurality of rows are arranged at equal angles around the axial direction, so that the square frame 81 can be installed to fit the specifications of the inner tank 2. The outer surface of the screw sleeve 84 is embedded and fixedly connected with the outer surface of the ring beam 11. A slide plate 85 is slidably connected to the inside of the frame 81. The slide plate 85 is made of magnetic material. A clamping sleeve 86 is clamped on the outer surface of the slide plate 85. The outer surface of the clamping sleeve 86 is fixedly connected to the outer surface of the inner tank 2. The inner surface of the clamping sleeve 86 The frame 81 is fixedly connected with a magnetic plate 87, which is made of a permanent magnet with strong magnetism. The magnetic plate 87 is movably connected to the slide plate 85 through magnetic adsorption. The outer surface of the slide plate 85 is provided with a slide groove 88, and the inner sliding connection of the slide groove 88 is provided with a slider 89. The combination of the slider 89 and the slide groove 88 improves the force-bearing capacity and stability of the slide plate 85. The outer surface of the slider 89 is fixedly connected to the inside of the frame 81, and the body of the slider 89 is slidably connected with a slide rod 810. The outer surface of the slide rod 810 is fixedly connected to the inside of the slide groove 88, and the outer surface of the slide rod 810 is provided with a compression spring 811. The compression spring 811 facilitates the resetting of the slide plate 85, and the two ends of the compression spring 811 are respectively fixedly connected to the outer surface of the slider 89 and the inside of the slide groove 88.

[0042] In this embodiment, when the inner tank 2 is placed inside the outer tank 1, the sleeve 86 and the slide plate 85 are aligned radially, and then the magnetic plate 87 slides the slide plate 85 by magnetic attraction, so that the slide plate 85 enters the sleeve 86 to fix the inner tank 2. At the same time, the relative position of the slider 89 changes with the movement of the slide plate 85, thereby compressing or stretching the compression spring 811. When the inner tank 1 needs to be removed, the other side of the slide plate 85 is adsorbed by a magnet, and the slide plate 85 can be reset with the elastic force of the compression spring 811.

[0043] Embodiment 4: Based on Embodiment 3, refer to the attached Figure 1 , Attachment Figure 4 ;

[0044] A side guard unit 82 is provided on the outside of the frame 81, and the side guard unit 82 includes a fixing strip 821, the outer surface of which is fixedly connected to the inside of the outer tank 1, and a slot 822 is provided on the outer surface of the fixing strip 821, and a fixing strip 823 is clamped inside the slot 822, and the cross section of the fixing strip 823 is T-shaped to improve the stability of the connection, and the outer surface of the fixing strip 823 is fixedly connected to a side plate 824, and the length specification of the side plate 824 is adapted to the outer diameter of the inner tank 2 to support the inner tank 2 inwardly, and the outer surface of the side plate 824 is movably connected to the outer surface of the inner tank 2, and the outer surface of the side plate 824 is movably connected to the outer surface of the inner tank 2, and the outer surface of the side plate 824 is movably connected to the insulation plate 825, and the insulation plate 825 is formed by filling perlite to insulate the side of the inner tank 2, and the outer surface of the insulation plate 825 is connected to the outer surface of the ring beam 11 The side plate 824 is movably connected, and the outer surface of the side plate 824 is fixedly connected with the groove plate 826, and the outer surface of the groove plate 826 is clamped with the push bar 827, and the outer surface of the push bar 827 is fixedly connected with the arc plate 828. There are multiple arc plates 828 arranged equidistantly along the radial direction, and the inner one is in contact with the side surface of the inner tank 2 to provide a comprehensive side protection effect. The arc plate 828, the groove plate 826, the push bar 827 and the side plate 824 are all made of pressure-resistant and heat-insulating materials, and provide filling space and isolate the perlite gap from reducing the heat-insulating performance. The outer surface of the arc plate 828 is movably connected with the outer surface of the inner tank 2 and the insulation plate 825 respectively. The outer surface of the arc plate 828 is provided with a groove 829, and the inside of the groove 829 is movably connected with the outer surface of the frame 81 and the sleeve 86 respectively.

[0045] In this embodiment, after the inner tank 2 is placed and fixed, a side panel 824 of suitable specifications is selected, and the side panel 824 is installed inside the outer tank 1 through the connection of the clamping strip 823 and the clamping groove 822 to abut the inner tank 2. Then, an arc plate 828 of suitable specifications is selected, and the arc plate 828 is installed inside the outer tank 1 through the connection of the abutting strip 827 and the groove plate 826 to support the side panel 824 and the inner tank 2. The arrangement of the groove 829 facilitates the placement of the arc plate 828 outside the frame 81 and the clamping sleeve 86, and then perlite is filled between the side panel 824 and the arc plate 828 to achieve insulation of the side of the inner tank 2.

[0046] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A low-temperature large double-layer liquid ammonia storage tank system, characterized by: include: A storage tank for storing liquid ammonia, the storage tank comprising a flat-top inner tank (2) made of low-temperature steel and a dome-type outer tank (1) made of Q235 carbon steel, wherein the inner tank (2) is arranged inside the outer tank (1); A precooling mechanism, the precooling mechanism is arranged on the body of the storage tank, the precooling mechanism comprises a spray pipe (3), the spray pipe (3) is fixedly arranged inside the inner tank (2), the spray pipe (3) is provided with nozzles (4) arranged at equal intervals, the nozzles (4) spray liquid ammonia by atomization to precool the inside of the inner tank (2), the inside of the spray pipe (3) is penetrated and connected with a liquid inlet pipe (5), the liquid inlet pipe (5) is divided into two sections, one section of the liquid inlet pipe (5) is penetrated and fixedly connected with the body of the outer tank (1); A plug-in connection component (6), the plug-in connection component (6) being arranged between one end of the two sections of the liquid inlet pipe (5) being connected to each other, and being used for connecting the inside of the liquid inlet pipe (5) to feed liquid ammonia; A fixing component (8), wherein the fixing component (8) is arranged inside the outer tank (1) and is used to fix the inner tank (2).

2. A low-temperature large double-layer liquid ammonia storage tank system according to claim 1, characterized in that: A flat top cover (7) is slidably connected to the outer surface of the other section of the liquid inlet pipe (5); the outer surface of the flat top cover (7) is fixedly connected to the arch of the outer tank (1) through a hanging rod (13); the outer surface of the flat top cover (7) is movably connected to the tank mouth of the inner tank (2); a one-way valve (9) is fixedly connected to the body of the flat top cover (7); the interior of the one-way valve (9) is respectively connected to the interior of the inner tank (2) and the outer tank (1); a cotton board (10) is fixedly connected to the outer surface of the flat top cover (7); a ring beam (11) is arranged below the flat top cover (7); the outer surface of the ring beam (11) is fixedly connected to the interior of the outer tank (1); the outer surface of the ring beam (11) is movably connected to the bottom of the inner tank (2); and a filling plate (12) is filled between the outer surface of the ring beam (11) and the interior of the outer tank (1).

3. A low-temperature large double-layer liquid ammonia storage tank system according to claim 1, characterized in that: The plug-in assembly (6) comprises a sleeve (61), the body of the sleeve (61) is provided with two through holes (62), the outer surface of one section of the liquid inlet pipe (5) is slidably connected to the inside of the through hole (62) on one side, and one end of the other section of the liquid inlet pipe (5) is threadedly connected to the inside of the through hole (62) on the other side, the inside of the sleeve (61) is fixedly connected to a hollow plate (63), the outer surface of the hollow plate (63) is fixedly connected to a spring rod (64), the output end of the spring rod (64) is fixedly connected to a blocking ball (65), and the outer surface of the blocking ball (65) is movably connected to the inside of the through hole (62) on one side and one end of one section of the liquid inlet pipe (5).

4. A low-temperature large double-layer liquid ammonia storage tank system according to claim 3, characterized in that: The interior of the sleeve (61) is slidably connected to a sliding sleeve (66), the body of the sliding sleeve (66) is fixedly connected to the outer surface of one section of the liquid inlet pipe (5), the interior of the sleeve (61) is fixedly connected to a sealing ring (67), the sealing ring (67) is sleeved on the outside of one section of the liquid inlet pipe (5), and the outer surface of the sealing ring (67) is movably connected to the outer surface of the sleeve (61).

5. A low-temperature large double-layer liquid ammonia storage tank system according to claim 2, characterized in that: The fixing assembly (8) comprises a square frame (81), the outer surface of the square frame (81) is fixedly connected to a screw rod (83), the outer surface of the screw rod (83) is fixedly connected to a screw sleeve (84), the outer surface of the screw sleeve (84) is embedded and fixedly connected to the outer surface of the ring beam (11), the inside of the square frame (81) is slidably connected to a slide plate (85), the outer surface of the slide plate (85) is clamped with a clamping sleeve (86), the outer surface of the clamping sleeve (86) is fixedly connected to the outer surface of the inner tank (2), the inside of the clamping sleeve (86) is fixedly connected to a magnetic plate (87), and the magnetic plate (87) is movably connected to the slide plate (85) through magnetic adsorption.

6. A low-temperature large double-layer liquid ammonia storage tank system according to claim 5, characterized in that: The outer surface of the slide plate (85) is provided with a slide groove (88), and the interior of the slide groove (88) is slidably connected to a slider (89), and the outer surface of the slider (89) is fixedly connected to the interior of the frame (81). The body of the slider (89) is slidably connected with a slide rod (810), and the outer surface of the slide rod (810) is fixedly connected to the interior of the slide groove (88). The outer surface of the slide rod (810) is sleeved with a compression spring (811), and the two ends of the compression spring (811) are respectively fixedly connected to the outer surface of the slider (89) and the interior of the slide groove (88).

7. A low-temperature large double-layer liquid ammonia storage tank system according to claim 5, characterized in that: A side guard unit (82) is arranged outside the square frame (81), and the side guard unit (82) comprises a fixing strip (821), the outer surface of the fixing strip (821) is fixedly connected to the inside of the outer tank (1), the outer surface of the fixing strip (821) is provided with a clamping groove (822), the inside of the clamping groove (822) is clamped with a clamping strip (823), the outer surface of the clamping strip (823) is fixedly connected to a side plate (824), the outer surface of the side plate (824) is movably connected to the outer surface of the inner tank (2), the outer surface of the side plate (824) is movably connected to a heat preservation plate (825), and the outer surface of the heat preservation plate (825) is movably connected to the outer surface of the ring beam (11).

8. A low-temperature large double-layer liquid ammonia storage tank system according to claim 7, characterized in that: The outer surface of the side plate (824) is fixedly connected to a groove plate (826), the outer surface of the groove plate (826) is clamped with a push bar (827), the outer surface of the push bar (827) is fixedly connected to an arc plate (828), the outer surface of the arc plate (828) is movably connected to the outer surface of the inner tank (2) and the insulation plate (825), and the outer surface of the arc plate (828) is provided with a groove (829), and the interior of the groove (829) is movably connected to the outer surface of the frame (81) and the sleeve (86).

Images