Liquid drainage structure of inner container of horizontal low-temperature liquid storage tank

Abstract

The utility model belongs to the technical field of low-temperature storage tanks, and particularly relates to a liquid drainage structure of an inner container of a horizontal low-temperature liquid storage tank. Comprising a storage tank inner container, an end socket, a pump suction inlet pipeline and a pipeline fixing support. The sealing head is arranged at the bottom of the storage tank inner container, the pipeline fixing support is fixed on the inner wall of the bottom of the storage tank inner container, one end of the pump suction inlet pipeline is sleeved in the pipeline support, and the other end of the pump suction inlet pipeline extends out of the storage tank inner container. In the practical application, the pump suction inlet pipeline is supported through the pipeline support, so that the pump suction inlet pipeline extends into the bottom of the storage tank inner container, the pump suction inlet pipeline is isolated from the storage tank inner container through the sealing head, and the discharging effect of liquid in the storage tank inner container is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to low temperature storage tank technical field, concretely relates to a horizontal low temperature liquid storage tank content container liquid discharge structure. BACKGROUND

[0002] In the field of low temperature liquid storage and transportation, horizontal low temperature liquid storage tanks are widely used for storing low temperature media such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, etc. Such storage tanks usually include an external vacuum insulated shell and an internal low temperature liquid container to minimize heat transfer and maintain an internal low temperature environment. However, in actual operation, how to efficiently and completely discharge the low temperature liquid in the storage tank is an important challenge. Due to the design or installation position of the liquid discharge pipeline, a certain amount of low temperature liquid is left at the bottom of the storage tank, which affects the utilization rate of the storage tank and the safety of subsequent operation. The pump suction inlet pipeline lacks effective support structure, which is easy to displace or damage due to material shrinkage or external vibration in low temperature environment, thereby affecting the liquid discharge efficiency and the service life of the equipment. The connection between the storage tank content container and the liquid discharge structure is poorly sealed, which may cause low temperature liquid leakage, not only causing resource waste, but also possibly causing safety hazards. The complex structure design increases the difficulty of daily maintenance and fault elimination, and increases the operating cost.

[0003] A horizontal flash tank is disclosed in Chinese patent CN202237315U, which includes a tank body, a feed inlet, a steam outlet, a discharge outlet, and a drain. The feed inlet and the discharge outlet are located on the same side of the middle part of the tank body. Alternatively, the feed inlet and the discharge outlet are located on the left and front sides of the middle part of the tank body, respectively. Alternatively, the feed inlet and the discharge outlet are located on the front and rear sides of the middle part of the tank body, respectively. The above device discharges the work material in the tank body through the drain, but cannot completely discharge the work material in the tank body. Therefore, it is urgent for the skilled in the art to solve the above technical problems. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is that the horizontal low temperature liquid storage tank content container cannot completely discharge the liquid in the storage tank content container, which affects the pumping of the liquid in the storage tank content container.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] The horizontal low-temperature liquid storage tank inner container liquid discharge structure comprises a storage tank inner container, a head, a pump suction inlet pipeline and a pipeline fixed support; the head is arranged at the bottom of the storage tank inner container, the pipeline fixed support is fixed to the inner wall of the bottom of the storage tank inner container, one end of the pump suction inlet pipeline is sleeved in the pipeline support, and the other end of the pump suction inlet pipeline protrudes out of the storage tank inner container.

[0007] By adopting the above technical scheme, the pump suction inlet pipeline is inserted into the bottom of the storage tank inner container, and isolation from the head is ensured, so that the low-temperature liquid in the storage tank can be discharged to the maximum extent, liquid residue is reduced, the utilization rate of the storage tank is improved, the pipeline fixed support provides stable support for the pump suction inlet pipeline, displacement or damage caused by a low-temperature environment or external vibration is prevented, the reliability and safety of the system are increased, the design and welding process of the head ensure good sealing between the pump suction inlet pipeline and the storage tank inner container, the risk of low-temperature liquid leakage is effectively avoided, resources are saved and safe operation is ensured, and the pipeline fixed support made of stainless steel not only enhances the structural strength but also improves the corrosion resistance, and is particularly suitable for long-term use in a low-temperature environment.

[0008] Further, the pipeline fixed support comprises a connecting part and a fixed part, the connecting part is an L-shaped bending piece, one end of the connecting part is welded to the side wall of the storage tank inner container, and the fixed part is in a ring structure, the fixed part is upwardly open and the outer wall thereof is welded to the other end of the connecting part.

[0009] By adopting the above technical scheme, the design of the L-shaped bending piece provides an additional support point, and the stability of the entire fixed support is enhanced. It not only can bear the weight of the pump suction inlet pipeline, but also can resist the force caused by liquid flow or external vibration, and ensure the stability and reliability during the liquid discharge process. The ring structure of the fixed part is matched with the pump suction inlet pipeline, so that the installation is more accurate. This helps to ensure the accurate position of the pump suction inlet pipeline and avoids the problem of uneven liquid suction or leakage caused by position deviation. This design allows the pump suction inlet pipeline to be quickly and easily installed, and if the pipeline needs to be replaced or repaired, it is also convenient to disassemble and reinstall. The ring-shaped fixed part can conveniently fix the pipeline in place, and the L-shaped connecting part provides sufficient space for operation. One end of the L-shaped bending piece is directly welded to the side wall of the storage tank inner container, and such a structure can effectively disperse the force applied to the pipeline and prevent local stress concentration, thereby prolonging the service life of the fixed support and its related components. The tight fit between the ring structure of the fixed part and the pump suction inlet pipeline, together with the possible addition of sealing materials (such as a sealing ring), can further improve the sealing performance of the system and reduce the risk of low-temperature liquid leakage from the interface.

[0010] Further, the aperture of the fixed part is matched with the pump suction inlet pipeline.

[0011] By adopting the above technical solution, the adapted aperture can ensure that the pump suction inlet pipeline is accurately installed in a fixed position, avoiding installation deviations caused by an aperture that is too large or too small. This not only improves installation efficiency but also reduces potential problems caused by improper installation. The close fit between the aperture and the pump suction inlet pipeline helps to form a good sealing effect. The precisely adapted aperture limits the movement space of the pump suction inlet pipeline within the fixed support, reducing pipeline shaking or displacement caused by liquid flow or external vibration, thereby improving the stability and durability of the system. When the aperture matches the size of the pipeline, the relative movement between the two is reduced, reducing wear caused by friction during long-term use and prolonging the service life of the pump suction inlet pipeline and the fixed support.

[0012] Further, the head is provided with a containing cavity, and the distance between the pump suction inlet pipeline and the bottom of the containing cavity is 5-10 cm.

[0013] By adopting the above technical solution, by setting a certain distance, the low-temperature liquid can flow freely around the pump suction inlet pipeline, avoiding poor liquid flow caused by direct contact between the pipeline and the tank bottom. This helps the liquid to flow more uniformly to the pump suction inlet, improving the liquid discharge efficiency. The pump suction inlet pipeline maintains a certain distance from the tank bottom, which can ensure that even if there is a small amount of residual liquid at the bottom of the inner container of the storage tank, the liquid can be effectively sucked. If the pipeline is completely in contact with the tank bottom, a "dead zone" may be formed, causing some liquid to be unable to be extracted. Maintaining an appropriate distance between the pipeline and the tank bottom reduces the possibility of direct contact between the pipeline and the tank bottom or sediment, thereby reducing wear caused by friction and the risk of pipeline blockage by solid substances. This is very important for maintaining the long-term stable operation of the system. The design allows the pump suction inlet pipeline to effectively suck liquid within a relatively large range, ensuring good suction effect even when the liquid level is low, increasing the flexibility and adaptability of the system.

[0014] Further, the pipeline fixed support is made of stainless steel, and the head is welded to the bottom of the inner container of the storage tank.

[0015] By adopting the above technical solution, stainless steel has excellent corrosion resistance, especially suitable for low-temperature liquid environments. It can resist low-temperature media and corrosive substances that may exist in the environment, thereby prolonging the service life of the fixed support. Stainless steel has high strength and can withstand large mechanical stress, ensuring that the fixed support remains stable during long-term use and does not deform or break due to external vibration or temperature changes. Stainless steel can maintain good mechanical properties in low-temperature environments and does not become brittle at extremely low temperatures like some materials, so it is very suitable for use in low-temperature liquid storage tanks.

[0016] Further, the head protrudes from the outer wall of the bottom of the inner container of the tank, and the top of the head is flush with the inner wall of the bottom of the inner container of the tank.

[0017] The utility model has the advantages of the following:

[0018] 1. The utility model discloses a pump suction inlet pipeline is explored into the bottom of the inner container of the tank through the pipeline fixed support, and keeps a certain spacing with the head, and simultaneously ensures the isolation with the head, so that the low-temperature liquid can flow freely around the pump suction inlet pipeline, avoids the liquid flow not to be smooth because of the direct contact of the pipeline with the tank bottom, thereby discharging the low-temperature liquid in the tank to the maximum, reduces the liquid residue, improves the utilization rate of the tank, and even when a small amount of residual liquid exists in the bottom of the inner container of the tank, the liquid can also be effectively sucked.

[0019] 2. The utility model discloses a pipeline fixed support made of stainless steel is adopted, the head is welded in the bottom of the inner container of the tank, and the head protrudes from the outer wall of the bottom of the inner container of the tank, and the top of the head is flush with the inner wall of the bottom of the inner container of the tank, the stainless steel material provides excellent corrosion resistance and mechanical strength, especially maintains good performance under low-temperature environment, prolongs the service life of the fixed support, and the welding connection guarantees the good sealing between the head and the inner container of the tank, prevents the low-temperature liquid from leaking, guarantees the safe operation, the design of the head not only enhances the structural strength of the whole tank bottom, but also is convenient for external cleaning and maintenance, and the flush design reduces the internal dead angle, and is convenient for cleaning and inspection.

[0020] 3. The utility model discloses a pipeline fixed support includes L type bending piece and annular fixed part, and the fixed part aperture is compatible with the pump suction inlet pipeline, and the connection mode of the head and the bottom of the inner container of the tank, and the L type bending piece provides additional support point for the fixed support, enhances stability, and the annular fixed part ensures the accurate installation of the pump suction inlet pipeline, reduces installation deviation and potential problems, and the compatible aperture design and close cooperation improve the sealing property, reduce vibration and displacement, reduce the abrasion risk, and simplify the maintenance process. ACCURATE DRAWINGS

[0021] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0022] Figure 2 It is the internal structure schematic diagram of the utility model;

[0023] Figure 3 It is the structure schematic diagram of the pipeline fixed support and the head of the utility model.

[0024] Among them, 1-head;11-contains the cavity;2-pipeline fixed support;21-connection;22-fixed part;3-pump suction inlet pipeline;4-tank inner container. SPECIFIC IMPLEMENTATION

[0025] The utility model will be described in further detail below in combination with the drawings and specific preferred embodiments.

[0026] In the description of the utility model, it needs to be understood that the orientation or position relationship indicated by the terms "left side", "right side", "upper part", "lower part" and the like is the orientation or position relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and "first", "second" and the like do not represent the importance of the parts, so it cannot be understood as a limitation on the utility model. The specific size adopted in the embodiment is only for the purpose of illustrating the technical scheme, and does not limit the protection scope of the utility model.

[0027] As shown in Figure 1 , Figure 2 and Figure 3 , a horizontal low-temperature liquid storage tank inner container liquid discharge structure, specifically comprising a storage tank inner container 4, a head 1, a pump suction inlet pipeline 3 and a pipeline fixed support 2. The storage tank inner container 4 serves as the main part of the whole system and is used for containing low-temperature liquid; the head 1 is arranged at the bottom of the storage tank inner container 4 and plays a sealing role and provides a safe channel for the pump suction inlet pipeline 3; one end of the pump suction inlet pipeline 3 is installed in the storage tank inner container 4 through the pipeline fixed support 2, and the other end protrudes out of the storage tank inner container 4 and is used for pumping out low-temperature liquid; and the pipeline fixed support 2 is fixed on the inner wall at the bottom of the storage tank inner container 4 and provides stable support for the pump suction inlet pipeline 3. The pipeline fixed support 2 is composed of a connecting part 21 of an L-shaped bending piece and a fixing part 22 of an annular structure, wherein one end of the connecting part 21 is welded on the side wall of the storage tank inner container 4, an additional support point is provided, and the overall stability is enhanced; the fixing part 22 has an upward opening, an outer wall is welded on the other end of the connecting part 21, the hole diameter is matched with the pump suction inlet pipeline 3, and it is ensured that the pump suction inlet pipeline 3 can be accurately and stably installed.

[0028] The head 1 is welded at the bottom of the storage tank inner container 4, a firm and completely sealed interface is formed, and leakage of low-temperature liquid is prevented. The head is provided with a containing cavity 11, the pump suction inlet pipeline 3 and the bottom of the containing cavity 11 are kept at a distance of 5cm-10cm, the liquid flow path is optimized, and the residue is reduced. The head 1 protrudes from the outer wall at the bottom of the storage tank inner container 4, the top is flush with the inner wall at the bottom of the storage tank inner container 4, the structural strength is enhanced, and external cleaning and internal operation are facilitated. The pipeline fixed support 2 is made of stainless steel, the structural strength is enhanced, the corrosion resistance is improved, and it is particularly suitable for long-term use in a low-temperature environment.

[0029] In summary, the tank inner container 4 and the head 1 are firmly connected by welding to form a closed space, ensuring the safe storage of low-temperature liquids; the accommodating cavity 11 on the head 1 allows the pump suction inlet pipe 3 to be inserted into the bottom of the tank inner container 4, but maintains a certain distance, ensuring smooth liquid flow and reducing residue; one end of the pump suction inlet pipe 3 is fitted into the pipe fixing support 2 composed of the connecting part 21 and the fixing part 22, ensuring its stable position and reducing displacement due to external vibration or temperature changes. This design greatly improves the liquid discharge efficiency and reduces liquid residue: the pump suction inlet pipe 3 is inserted into the bottom of the tank inner container 4 and maintains a certain distance from the head 1, allowing low-temperature liquids to flow freely around the pipe, maximizing the discharge of low-temperature liquids from the tank and reducing residue, improving tank utilization. At the same time, it enhances the stability and safety of the system: the excellent corrosion resistance and mechanical strength provided by stainless steel materials, especially in low-temperature environments, maintain good performance, extending the service life of the fixing support. The welded connection ensures good sealing between the head 1 and the tank inner container 4, preventing low-temperature liquid leakage and ensuring safe operation. In addition, it optimizes installation, maintenance, and long-term reliability: the connecting part 21 and the annular fixing part 22 of the L-shaped bending part ensure the precise installation of the pump suction inlet pipe 3, reducing installation deviations and potential problems. The adapted hole diameter design and tight fit improve sealing, reduce vibration and displacement, reduce wear risk, and simplify the maintenance process. The welded connection of the head 1 and the bottom of the tank inner container 4 reduces the need for routine maintenance, improving the long-term reliability of the system. Therefore, this liquid discharge structure achieves efficient and stable low-temperature liquid discharge function while ensuring the reliability and safety of the system, suitable for low-temperature liquid tank applications that require frequent liquid discharge operations.

[0030] Working principle: One end of the pump suction inlet pipe 3 is installed in the tank inner container 4 through the pipe fixing support 2 and is inserted close to the tank bottom, so that the pump suction inlet can cover most of the area in the tank, including the liquid near the bottom; at the same time, the pump suction inlet pipe 3 maintains a 5-10 cm distance from the bottom of the accommodating cavity 11 on the head 1, avoiding direct contact with the tank bottom to prevent blockage or wear caused by friction or deposits, while allowing liquid to flow freely around it. This design not only eliminates the "dead zone" that may be formed in traditional designs, i.e., areas where liquid cannot be effectively sucked, but also helps liquid flow more evenly to the pump suction inlet, improving liquid discharge efficiency and reducing residue, maximizing the discharge of low-temperature liquids from the tank and improving tank utilization.

[0031] In order to ensure the stability and safety of the system, the pipe fixing support 2 is composed of a connecting part 21 of L-shaped bending piece and a fixing part 22 of ring structure. One end of the connecting part 21 is welded on the side wall of the inner container 4 of the storage tank, providing an additional support point and enhancing the overall stability, ensuring that the pump suction inlet pipe 3 can maintain a stable position under low temperature environment or external vibration and will not be displaced or damaged. The fixing part 22 has an upward opening, and the outer wall is welded on the other end of the connecting part 21. The hole diameter of the fixing part 22 is matched with the pump suction inlet pipe 3, ensuring the accurate installation and stable support of the pipe, reducing the possibility of vibration and displacement, and reducing the risk of wear and tear in long-term use.

[0032] The head 1 is welded on the bottom of the inner container 4 of the storage tank, forming a solid and completely sealed interface to prevent leakage of low-temperature liquid and ensure the safety of the system. The head is provided with a receiving cavity 11 to provide a safe passage for the pump suction inlet pipe 3 while maintaining good sealing performance. In addition, the pipe fixing support 2 is made of stainless steel, which not only enhances the structural strength but also improves the corrosion resistance, especially suitable for long-term use in low-temperature environments, further ensuring the reliability and durability of the system.

[0033] The head 1 protrudes from the outer wall of the bottom of the inner container 4 of the storage tank, and the top is flush with the inner wall of the bottom of the inner container 4 of the storage tank, which not only enhances the structural strength but also facilitates external cleaning and internal operation, simplifying the daily maintenance process. The design of the L-shaped bending piece connecting part 21 and the ring-shaped fixing part 22 makes the installation and removal of the pump suction inlet pipe 3 more convenient and fast, reducing maintenance time and cost.

[0034] The above describes the preferred embodiments of the present application, but the present application is not limited to the specific details of the above embodiments. Within the technical concept of the present application, various equivalent transformations of the technical solutions of the present application can be made, and these equivalent transformations all belong to the protection scope of the present application.

Claims

1. A draining structure for the inner container of a horizontal cryogenic liquid storage tank, characterized in that: It includes a storage container (4), a head (1), a pump suction inlet pipe (3) and a pipe fixing support (2); the head (1) is arranged at the bottom of the storage container (4), the pipe fixing support (2) is fixed to the inner wall of the bottom of the storage container (4), one end of the pump suction inlet pipe (3) is sleeved in the pipe fixing support (2), and the other end of the pump suction inlet pipe (3) protrudes out of the storage container (4).

2. The horizontal low-temperature liquid storage tank inner container liquid discharge structure according to claim 1, characterized by: The pipe fixing support (2) comprises a connecting part (21) and a fixing part (22), the connecting part (21) is an L-shaped bending part, one end of the connecting part (21) is welded to the side wall of the storage container (4), and the fixing part (22) is in the form of an annular structure, the opening of the fixing part (22) faces upwards, and the outer wall of the fixing part (22) is welded to the other end of the connecting part (21).

3. The horizontal low-temperature liquid storage tank inner container liquid discharge structure according to claim 2, characterized by: The aperture of the fixing part (22) is matched with the pump suction inlet pipe (3).

4. The horizontal low-temperature liquid storage tank inner container liquid discharge structure according to claim 1, characterized by: The head (1) is provided with a containing cavity (11), and the distance between the pump suction inlet pipe (3) and the bottom of the containing cavity (11) is 5-10 cm.

5. The horizontal low-temperature liquid storage tank inner container liquid discharge structure according to claim 1, characterized by: The pipe fixing support (2) is made of stainless steel, and the head (1) is welded to the bottom of the storage container (4).

6. The horizontal low-temperature liquid storage tank inner container liquid discharge structure according to claim 5, characterized by: The head (1) protrudes from the outer wall of the bottom of the storage container (4), and the top of the head (1) is flush with the inner wall of the bottom of the storage container (4).

Images