A cryogenic pressure vessel having a crush resistant structure

Abstract

The utility model discloses a kind of deep cooling pressure vessels with anti-pressure structure, the utility model relates to pressure vessel technical field. Including: outer tank, the bottom end fixed mounting of outer tank has support leg, the inside of outer tank is provided with pressure tank, the outside of pressure tank is provided with anti-pressure component, the outside of pressure tank is provided with buffer component, the inner wall of outer tank is fixedly connected with reinforcing rib, the utility model directly enhances the strength of outer tank itself by setting reinforcing rib, effectively resist the deformation risk caused by external impact or internal pressure conduction, avoid the medium leakage caused by the rupture of outer tank, by setting anti-pressure component, when pressure tank is due to medium expansion or external pressure deformation, rubber block can be converted into flexible deformation by elastic deformation with rigid pressure, directly absorb pressure, prevent the rupture of pressure tank or outer tank local pressure too large.

Description

Technical Field

[0001] This utility model relates to the field of pressure vessel technology, specifically to a cryogenic pressure vessel with a pressure-resistant structure. Background Technology

[0002] Cryogenic pressure vessels are core equipment for the storage and transportation of cryogenic media such as liquid oxygen, liquid nitrogen, and liquefied natural gas. They need to operate in extreme low-temperature environments for a long time and withstand the internal pressure generated by the evaporation of the media. The general structure mainly consists of an outer shell, a pressure vessel, and a supporting and fixing structure between the two. The pressure vessel is located inside the outer shell and is protected by the outer shell. A vacuum environment is formed between the outer shell and the internal pressure vessel to minimize the impact of external heat on the internal pressure vessel.

[0003] However, in the existing technology, the internal pressure tank is prone to local concave and convex deformation during the cycle of vacuuming and pressurizing filling. Long-term accumulation can cause weld cracking. The existing structure lacks flexible buffering means for such deformation. Although some equipment uses simple rubber gaskets for buffering, the material's low-temperature resistance is insufficient, and it loses its elasticity in a short period of time, making it impossible to achieve long-term stable pressure absorption. Utility Model Content

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this utility model is as follows: a cryogenic pressure vessel with a pressure-resistant structure, comprising: an outer tank, a support leg fixedly installed at the bottom of the outer tank, a pressure tank disposed inside the outer tank, a pressure-resistant component disposed outside the pressure tank, buffer components symmetrically disposed outside the pressure tank, reinforcing ribs fixedly connected to the inner wall of the outer tank, the pressure-resistant component including a limiting block, a squeezing block slidably connected to the inner wall of the limiting block, and a rubber block fixedly connected to the inner wall of the limiting block.

[0005] Preferably, the pressure-resistant components are arranged in a ring along the central axis of the pressure tank, and the rubber block is located between the compression block and the limiting block. When the pressure tank deforms due to the expansion and contraction of the cryogenic medium or the action of external pressure, the outer wall of the pressure tank will push the compression block fixedly connected to it. The compression block slides along the inner wall of the limiting block, directly compressing the rubber block located between the two. The rubber block absorbs the pressure through its own elastic deformation, converting rigid pressure into flexible deformation.

[0006] Preferably, the outer wall of the extrusion block is fixedly connected to the outer wall of the pressure tank, the outer wall of the limiting block is slidably connected to the inner wall of the outer tank, and the outer wall of the extrusion block is slidably connected to the outer wall of the rubber block. The rubber block is made of silicone rubber, which has strong low-temperature resistance, can maintain elasticity at low temperatures, and has good chemical stability, making it less prone to failure due to corrosion from cryogenic media, and suitable as a buffer rubber in medium and low temperature scenarios.

[0007] Preferably, the buffer assembly includes an annular air inlet pipe, with an air delivery pipe fixedly connected to the outer wall of the annular air inlet pipe, and a push rod slidably connected to the inner wall of the air delivery pipe. A retaining ring is fixedly connected to the end of the push rod away from the air delivery pipe. Air is injected into the annular air inlet pipe through a valve outside the annular air inlet pipe, allowing air to enter the air delivery pipe and push the push rod to move. This causes the push rod to move the retaining ring, making the wear-resistant pad tightly adhere to the outer wall of the pressure tank.

[0008] Preferably, the gas supply pipes are arranged in a ring array along the central axis of the annular inlet pipe. A heat insulation pad is fixedly connected to the outer wall of the fixing ring, and a wear-resistant pad is fixedly connected to the outer wall of the heat insulation pad. The wear-resistant pad on the outer side of the heat insulation pad directly contacts the outer wall of the pressure tank, reducing frictional loss during pressure tank displacement and extending the component's service life. The heat insulation pad fixed to the outer wall of the fixing ring prevents the cryogenic temperature of the pressure tank from being conducted to the gas supply pipe, thus facilitating heat transfer isolation. The heat insulation pad is made of aerogel felt, with a thermal conductivity as low as 0.012 W / (m·K) and can withstand cryogenic temperatures below -200℃. The wear-resistant pad is made of ultra-high molecular weight polyethylene, with a low wear coefficient, can withstand ultra-low temperatures of -269℃, and is relatively soft, preventing scratches on the outer wall of the pressure tank and allowing it to withstand the sliding friction of the pressure tank for extended periods.

[0009] Preferably, the outer wall of the gas transmission pipe is fixedly connected to the inner wall of the outer tank, and the outer wall of the wear-resistant pad is slidably connected to the outer wall of the pressure tank.

[0010] The beneficial effects of this utility model are as follows: 1. This utility model directly enhances the strength of the outer tank by setting reinforcing ribs, effectively resisting the deformation risk caused by external impact or internal pressure transmission, and avoiding media leakage caused by the rupture of the outer tank. By setting anti-pressure components, when the pressure tank is deformed due to the expansion and contraction of the medium or external pressure, the rubber block can convert rigid pressure into flexible deformation through elastic deformation, directly absorbing the pressure and preventing the pressure tank or outer tank from rupturing due to excessive local pressure.

[0011] 2. By setting up a buffer component, after air is injected through the annular air inlet pipe, the push rod can slide with the displacement of the pressure tank, changing the air pressure in the air delivery pipe. The displacement is buffered by the expansion and contraction of air pressure, achieving dynamic pressure balance, supplementing the buffering effect of the anti-pressure component, and reducing the stress load on the core component. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a structural schematic diagram of the anti-compression component of this utility model; Figure 4 This is a schematic diagram of the structure of the buffer assembly of this utility model; Figure 5 This is a schematic diagram of the structure of the wear-resistant pad of this utility model.

[0013] In the diagram: 1. Outer tank; 2. Support leg; 3. Reinforcing rib; 4. Pressure-resistant component; 41. Extrusion block; 42. Limiting block; 43. Rubber block; 5. Buffer component; 51. Annular air inlet pipe; 52. Air delivery pipe; 53. Fixing ring; 54. Push rod; 55. Heat insulation pad; 56. Wear-resistant pad; 6. Pressure tank. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose. Example:

[0015] Please see Figure 1 - Figure 5 This utility model provides a technical solution: a cryogenic pressure vessel with a pressure-resistant structure, comprising: an outer tank 1, a support leg 2 fixedly installed at the bottom of the outer tank 1, a pressure tank 6 disposed inside the outer tank 1, a pressure-resistant component 4 disposed outside the pressure tank 6, a buffer component 5 symmetrically disposed outside the pressure tank 6, a reinforcing rib 3 fixedly connected to the inner wall of the outer tank 1, the pressure-resistant component 4 including a limiting block 42, a compression block 41 slidably connected to the inner wall of the limiting block 42, and a rubber block 43 fixedly connected to the inner wall of the limiting block 42.

[0016] The pressure-resistant components 4 are arranged in a ring along the central axis of the pressure tank 6, and the rubber block 43 is located between the compression block 41 and the limiting block 42.

[0017] The outer wall of the extrusion block 41 is fixedly connected to the outer wall of the pressure tank 6, the outer wall of the limiting block 42 is slidably connected to the inner wall of the outer tank 1, and the outer wall of the extrusion block 41 is slidably connected to the outer wall of the rubber block 43.

[0018] The buffer assembly 5 includes an annular air inlet pipe 51, an air supply pipe 52 is fixedly connected to the outer wall of the annular air inlet pipe 51, a push rod 54 is slidably connected to the inner wall of the air supply pipe 52, and a fixing ring 53 is fixedly connected to the end of the push rod 54 away from the air supply pipe 52.

[0019] The gas supply pipes 52 are arranged in a ring along the central axis of the annular air inlet pipe 51. A heat insulation pad 55 is fixedly connected to the outer wall of the fixing ring 53, and a wear-resistant pad 56 is fixedly connected to the outer wall of the heat insulation pad 55.

[0020] The outer wall of the gas pipeline 52 is fixedly connected to the inner wall of the outer tank 1, and the outer wall of the wear-resistant pad 56 is slidably connected to the outer wall of the pressure tank 6.

[0021] Working principle: The inner wall of the outer tank 1 is fixed with reinforcing ribs 3, which directly enhances the deformation resistance of the outer tank 1 and prevents damage to the outer tank 1 caused by external impact or internal pressure transmission. The pressure tank 6, as the storage core of the cryogenic medium, is symmetrically equipped with anti-pressure components 4 and buffer components 5 on the outside. The two components absorb the pressure generated by temperature changes or medium fluctuations in the pressure tank 6 from two dimensions: elastic buffering and gas pressure stabilization. The support legs 2 at the bottom of the outer tank 1 ensure that the entire container is placed stably and prevent pressure concentration from being aggravated by container tilting. During use, when the pressure tank 6 deforms due to the expansion and contraction of the cryogenic medium or external pressure, the outer wall of the pressure tank 6 pushes the compression block 41, which is fixedly connected to it. The compression block 41 slides along the inner wall of the limiting block 42, directly compressing the rubber block 43 located between them. The rubber block 43 absorbs pressure through its own elastic deformation, converting rigid pressure into flexible deformation, thus preventing the pressure tank 6 or the outer tank 1 from rupturing due to excessive local pressure. The inner wall of the limiting block 42 provides a sliding track for the compression block 41, while limiting the maximum displacement of the compression block 41, preventing the rubber block 43 from being over-compressed and failing, and ensuring that the buffering effect is controllable.

[0022] During use, air is injected into the annular air inlet pipe 51 through the valve outside the annular air inlet pipe 51, allowing air to enter the air delivery pipe 52 and pushing the push rod 54 to move. This push rod 54 then moves the fixed ring 53, causing the wear-resistant pad 56 to press tightly against the outer wall of the pressure tank 6. When the pressure tank 6 experiences displacement or pressure changes, it pushes the fixed ring 53 and push rod 54 to slide along the air delivery pipe 52. The sliding of the push rod 54 changes the air pressure inside the air delivery pipe 52. The expansion and contraction of the air pressure buffers the displacement of the pressure tank 6, achieving dynamic pressure balance. The wear-resistant pad 56 on the outside of the heat insulation pad 55 directly contacts the outer wall of the pressure tank 6, reducing frictional loss during pressure tank 6 displacement and extending the component's service life. The heat insulation pad 55 is fixed to the outer wall of the fixed ring 53, preventing the cryogenic temperature of the pressure tank 6 from being conducted to the air delivery pipe 52, thus facilitating heat transfer isolation and maintaining the low-temperature state of the pressure tank 6.

[0023] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A cryogenic pressure vessel with a pressure-resistant structure, characterized in that, include: The outer tank (1) has a support leg (2) fixedly installed at the bottom end. The outer tank (1) has a pressure tank (6) inside. The pressure tank (6) has an anti-pressure component (4) outside. The pressure tank (6) has a buffer component (5) symmetrically arranged outside. The inner wall of the outer tank (1) is fixedly connected with a reinforcing rib (3). The anti-pressure component (4) includes a limiting block (42). The inner wall of the limiting block (42) is slidably connected with a squeezing block (41). The inner wall of the limiting block (42) is fixedly connected with a rubber block (43).

2. A cryogenic pressure vessel with a pressure-resistant structure according to claim 1, characterized in that: The pressure-resistant components (4) are arranged in a ring along the central axis of the pressure tank (6), and the rubber blocks (43) are located between the compression blocks (41) and the limiting blocks (42).

3. A cryogenic pressure vessel with a pressure-resistant structure according to claim 1, characterized in that: The outer wall of the extrusion block (41) is fixedly connected to the outer wall of the pressure tank (6), the outer wall of the limiting block (42) is slidably connected to the inner wall of the outer tank (1), and the outer wall of the extrusion block (41) is slidably connected to the outer wall of the rubber block (43).

4. A cryogenic pressure vessel with a pressure-resistant structure according to claim 1, characterized in that: The buffer assembly (5) includes an annular air inlet pipe (51), an air supply pipe (52) is fixedly connected to the outer wall of the annular air inlet pipe (51), a push rod (54) is slidably connected to the inner wall of the air supply pipe (52), and a fixing ring (53) is fixedly connected to the end of the push rod (54) away from the air supply pipe (52).

5. A cryogenic pressure vessel with a pressure-resistant structure according to claim 4, characterized in that: The gas supply pipe (52) is arranged in a ring along the central axis of the annular air inlet pipe (51). The outer wall of the fixed ring (53) is fixedly connected with a heat insulation pad (55), and the outer wall of the heat insulation pad (55) is fixedly connected with a wear-resistant pad (56).

6. A cryogenic pressure vessel with a pressure-resistant structure according to claim 5, characterized in that: The outer wall of the gas pipeline (52) is fixedly connected to the inner wall of the outer tank (1), and the outer wall of the wear-resistant pad (56) is slidably connected to the outer wall of the pressure tank (6).

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