CN205137053U - Horizontal low temperature storage tank - Google Patents

Abstract

The utility model provides a horizontal low-temperature storage tank, which comprises an inner container, an outer shell, a front end support structure and a rear end support structure arranged between the inner container and the outer shell and arranged at both axial ends of the storage tank; the front end support Both the structure and the rear end support structure have one upper radial support and two lower radial supports distributed along the circumference of the inner container; the upper radial support is located at the top of the inner container; the lower radial The support is located below the horizontal axis of the inner container, and the two lower radial supports are arranged on both sides of the longitudinal axis of the inner container. The utility model effectively reduces heat leakage, improves heat insulation performance, and simultaneously reduces product manufacturing difficulty and manufacturing cost.

Description

Horizontal cryogenic storage tank

technical field

The utility model relates to the field of low-temperature medium storage and transportation equipment, in particular to a horizontal low-temperature storage tank.

Background technique

Cryogenic storage tank refers to a double-layer structure container that stores liquids with a boiling point temperature lower than -150°C (such as liquid nitrogen, liquid oxygen, liquid argon, and liquefied natural gas). The cryogenic storage tank consists of a container body and a container support. The container body is composed of an inner container, an outer shell, and an inner container supporting device. There are many types of container supports. The container supports commonly used for fixed type horizontal low temperature storage tanks are saddle type, while the commonly used container support types for mobile type horizontal low temperature storage tanks are saddle type and support beam type. , frame type, etc.

At present, the support of the inner container of the horizontal cryogenic storage tank mostly adopts the traditional eight-point support. The eight-point support structure mainly includes two groups of radial supports at the front and rear, which are installed in the interlayer space formed by the inner container and the outer shell. Each group has 4 support points, 2 at the upper part and 2 at the lower part, arranged at a certain angle along the circumferential direction. The rear end support (near the end of the import and export pipeline) is a fixed end, which must be able to prevent the inner container from moving back and forth and rolling; the front end support is a sliding end, allowing the inner container to slide freely.

This structure has eight leakage hotspots. At the same time, for high-vacuum multi-layer insulation cryogenic storage tanks, eight holes need to be opened in the multi-layer insulation quilt, which will reduce the overall insulation effect of the insulation quilt. For small-volume low-temperature storage tanks, especially high-vacuum heat-insulated low-temperature storage tanks with a volume of less than 15 cubic meters, the static evaporation rate of the low-temperature storage tank is too high, which affects the insulation performance. The Chinese utility model patent with the application number "ZL200720016991.8" discloses a support device for the inner container. On the basis of the eight-point support, the heat-insulating gasket structure is added, which is more beneficial to reduce heat leakage and can improve such products. insulation performance. However, the structure disclosed in this patent still belongs to the category of eight-point support structure, and the improvement of the overall thermal insulation performance of the storage tank is limited, especially for small storage tanks below 8 cubic meters, the improvement effect is not obvious. For the low-temperature storage tank with vacuum powder insulation, the eight-point support structure also increases heat leakage and manufacturing cost, which is not conducive to the requirements of the national policy of energy saving and emission reduction.

Utility model content

The purpose of the utility model is to provide a horizontal low-temperature storage tank, which solves the problem of poor overall thermal insulation performance of the low-temperature storage tank in the prior art due to heat leakage of the supporting structure.

In order to solve the above technical problems, the utility model adopts the following technical solutions: a horizontal low-temperature storage tank, including an inner container, an outer shell, a front support structure arranged between the inner container and the outer shell and arranged at both axial ends of the storage tank, and Rear end support structure; both the front end support structure and the rear end support structure have an upper radial support and two lower radial supports distributed along the circumferential direction of the inner container; the upper radial support is located on the The top of the inner container; the lower radial support is located below the horizontal mid-axis plane of the inner container, and the two lower radial supports are arranged on both sides of the longitudinal mid-axis plane of the inner container.

Preferably, the two lower radial supports are symmetrical with respect to the longitudinal mid-axis plane of the inner container.

Preferably, the included angle between the lower radial support and the longitudinal mid-axis plane of the inner container is 15°-75°.

Preferably, the central axis of the upper radial support is located on the longitudinal central axis of the inner container.

Preferably, both the upper radial support and the lower radial support of the rear end support structure are fixed supports, so that the inner container and the outer shell are relatively fixed; the upper radial support and the lower radial support of the front end support structure are both The movable support allows axial relative movement between the inner container and the outer shell.

Preferably, both the upper radial support and the lower radial support of the front end support structure include a backing plate, a cover plate and a cylindrical support; the backing plate is fixed on the inner container; the cover plate is fixed on the outer shell, which There is a positioning ring on the top; one end of the cylindrical support is limited in the positioning ring of the cover plate, and the other end is movably supported on the backing plate, and the cylindrical support and the backing plate can move relatively along the axial direction of the inner container.

Preferably, two baffles are provided at the upper radial support of the front end support structure; the two baffles are parallel to the longitudinal axis of the inner container; the two baffles are arranged on the backing plate, and the two baffles A limit track is formed between them, and the limit track is slidably matched with the cylindrical support.

Preferably, the horizontal cryogenic storage tank is a mobile pressure vessel with a volume not greater than 15 cubic meters.

Preferably, the horizontal cryogenic storage tank is a stationary pressure vessel.

Compared with the storage tank with traditional eight-point support structure, the horizontal low-temperature storage tank of the utility model has at least the following advantages:

1. Reduce heat leakage: The six-point support scheme has two less leakage hot spots than the eight-point support scheme, and correspondingly the number of openings on the insulation quilt is reduced from eight to six, which improves the overall insulation effect of the insulation quilt; Taken together, it can greatly reduce the heat leakage of storage tanks, especially for low-temperature storage tanks below 15 cubic meters, the thermal insulation performance can be increased by 10-15%, and the effect is more significant.

2. Reduce the difficulty of product manufacturing: According to the geometric principle of determining a plane by three points, the traditional eight-point support structure has four support points in each group, which belongs to the multi-constraint system and requires high manufacturing and assembly requirements; while the utility model The six-point support scheme has three support points in each group, and the constraints are reasonable, which greatly reduces the difficulty of manufacturing and assembly.

3. Reduced manufacturing cost: the storage tank of the utility model is easy to manufacture, and at the same time, the support material is also reduced, which can reduce the manufacturing cost.

Description of drawings

Fig. 1 is a schematic structural view of a preferred embodiment of a horizontal cryogenic storage tank of the present invention.

Fig. 2 is the A-A view in Fig. 1 of the utility model.

Fig. 3 is a partial enlarged schematic diagram of C in Fig. 2 of the present utility model.

Fig. 4 is a D-D view in Fig. 3 of the present utility model.

Fig. 5 is a B-B view in Fig. 1 of the utility model.

Fig. 6 is a partial enlarged schematic diagram of E in Fig. 5 of the present utility model.

Fig. 7 is the F-F view in Fig. 6 of the present utility model.

Reference signs are explained as follows: 1. Inner container; 2. Outer shell; 3. Front support structure; 31. Upper radial support; 311. Backing plate; 312. Cover plate; 3121. Positioning ring; 313. Cylindrical support; 32 , lower radial support; 34, baffle plate; 4, rear end support structure; 41, upper radial support; 411, backing plate; 4111, positioning ring; 412, cover plate; 4121, positioning ring; 413, cylindrical support ; 42, the lower radial support; 5, the pipeline.

detailed description

Typical implementations embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the utility model can have various changes in different embodiments, all of which do not depart from the scope of the utility model, and the description and illustrations therein are used as illustrations in nature, not for To limit the utility model.

Referring to FIG. 1 , the horizontal cryogenic storage tank of this embodiment mainly includes an inner container 1 , an outer shell 2 , a front support structure 3 , a rear support structure 4 and pipelines 5 .

The front support structure 3 and the rear support structure 4 are arranged between the inner container 1 and the outer shell 2 , and arranged at both ends of the storage tank in the axial direction, so as to support the inner container 1 in the outer shell 2 . The pipeline 5 extends into the outer shell 2 and the inner container 1 from the rear end of the storage tank to realize the entry and exit of the low-temperature medium.

Referring to FIG. 2 , the front end support structure 3 is mainly composed of an upper radial support 31 and two lower radial supports 32 , and these three radial supports 31 , 32 are distributed along the circumferential direction of the inner container 1 .

The upper radial support 31 is located on the top of the inner container 1 , and the central axis of the upper radial support 31 is located on the longitudinal central axis plane S2 of the inner container 1 .

The two lower radial supports 32 are located below the horizontal mid-axis plane S1 of the inner container, and are arranged on both sides of the longitudinal mid-axis plane S2 of the inner container 1 .

Preferably, the two lower radial supports 32 are symmetrical with respect to the longitudinal mid-axis plane S2 of the inner container 1 . The included angle between the lower radial support 32 and the longitudinal mid-axis surface S2 of the inner container 1 is 15°-75°, which can be determined according to stress distribution according to different design conditions.

The upper radial support 31 and the lower radial support 32 are movable supports, which allow a certain axial sliding between the inner container 1 and the outer shell 2, so as to meet the requirement of the inner container 1 expanding with heat and contracting with cold.

Referring to FIG. 3 , the upper radial support 31 includes a backing plate 311 , a cover plate 312 and a cylindrical support 313 . The backing plate 311 is fixedly arranged on the outer wall of the inner container 1; the cover plate 312 is fixedly arranged on the outer shell 2, and the cover plate 312 is provided with a positioning ring 3121; Inside the positioning ring 3121 , the other end is movably supported on the backing plate 311 , and the cylindrical support 313 and the backing plate 311 can move relatively along the axial direction of the inner container 1 .

Further, referring to FIG. 3 and FIG. 4 together, the front support structure 3 is also provided with two spaced baffles 34 at the upper radial support 31 .

The two baffles 34 are parallel to the longitudinal axis S2 of the inner container 1 and arranged on both sides of the longitudinal axis S2 of the inner container 1 . The two baffles 34 are fixedly arranged on the backing plate 311 of the upper radial support 31 , a limiting track is formed between the two baffles 34 , and the limiting track is slidingly matched with the cylindrical support 313 of the upper radial support 31 .

When the inner container 1 and the outer shell 2 slide axially due to thermal expansion and contraction, the cylindrical support 313 slides along the limiting track formed by the two baffles 34 . The two baffles 34 limit the lateral degree of freedom of the cylindrical support 313, which can prevent the cylindrical support 313 from sliding or falling off laterally, improve the ability of the support structure to resist lateral force, and ensure the stability of the support structure.

The specific structure of the lower radial support 32 can refer to the upper radial support 31 , and the lower radial support 32 can be provided with a baffle 34 or not.

Referring to FIG. 5 again, the rear support structure 4 is also composed of an upper radial support 41 and two lower radial supports 42 . The arrangement of the three radial supports 41 , 42 relative to the inner container 1 is the same as that of the three radial supports 31 , 32 of the front end support structure 3 , and will not be repeated here.

Both the upper radial support 41 and the lower radial support 42 are fixed supports, and the specific structures of the upper radial support 41 and the lower radial support 42 are the same. Referring to FIG. 6 and FIG. 7 , taking the upper radial support 41 as an example, the upper radial support 41 includes a backing plate 411 , a cover plate 412 and a cylindrical support 413 .

The backing plate 411 is fixedly arranged on the outer wall of the inner container 1, and the backing plate 411 is provided with a positioning ring 4111; the cover plate 412 is fixedly arranged on the outer shell 2, and the cover plate 412 is provided with a positioning ring 4121; the cylindrical support 413 can be made of fiberglass , one end of which is set in the positioning ring 4111 of the backing plate 411 , and the other end is limited in the positioning ring 4121 of the cover plate 412 .

Through the upper radial support 41 and the lower radial support 42, the inner container 1 and the outer shell 2 can be relatively fixed, preventing the inner container 1 from moving back and forth and rolling, and preventing the inner container 1 from causing damage to the pipeline 5 at the rear end due to thermal expansion and cold contraction. influences.

The inner container 1 is supported by a total of six points of the front support structure 3 and the rear support structure 4 and is located in the outer shell 2. It is subjected to force analysis and calculation and can meet the requirements of various fixed and mobile working conditions. The horizontal low-temperature storage tank can be a fixed pressure vessel or a mobile pressure vessel (including a marine storage tank). Wherein, when the storage tank is a mobile pressure vessel, this solution is especially suitable for a volume not greater than 15 cubic meters small storage tanks.

Compared with the storage tank with traditional eight-point support structure, the horizontal low-temperature storage tank of the utility model has at least the following advantages:

1. Reduce heat leakage: The six-point support scheme has two less leakage hot spots than the eight-point support scheme, and correspondingly the number of openings on the insulation quilt is reduced from eight to six, which improves the overall insulation effect of the insulation quilt; Taken together, it can greatly reduce the heat leakage of storage tanks, especially for low-temperature storage tanks below 15 cubic meters, the thermal insulation performance can be increased by 10-15%, and the effect is more significant.

2. Reduce the difficulty of product manufacturing: According to the geometric principle of determining a plane by three points, the traditional eight-point support structure has four support points in each group, which belongs to the multi-constraint system and requires high manufacturing and assembly requirements; while the utility model The six-point support scheme has three support points in each group, and the constraints are reasonable, which greatly reduces the difficulty of manufacturing and assembly.

3. Reduced manufacturing cost: the storage tank of the utility model is easy to manufacture, and at the same time, the support material is also reduced, which can reduce the manufacturing cost.

While the invention has been described with reference to a few exemplary embodiments, it is understood that the words which have been used are words of description and illustration, rather than of limitation. Since the invention can be embodied in various forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be broadly defined within the spirit and scope of the appended claims. Therefore, all changes and modifications that fall within the scope of the claims or their equivalents should be covered by the appended claims.

Claims (9)

1. a horizontal low temperature storage tank, comprises inner container, shell, to be arranged between inner container and shell and to be respectively in front support structure and the rear end supporting structure at the axial two ends of storage tank; It is characterized in that:

Described front support structure and described rear end supporting structure all have the top radial support and two bottom radial support that distribute along described inner container circumference;

Described top radial support is positioned at the top of described inner container;

Described bottom radial support is arranged in below the level axial plane of described inner container, and two bottom radial support are respectively in the both sides, longitudinal central axis face of inner container.

2. horizontal low temperature storage tank according to claim 1, is characterized in that, bottom radial support described in two is symmetrical relative to the longitudinal central axis face of inner container.

3. horizontal low temperature storage tank according to claim 2, is characterized in that, the angle between the longitudinal central axis face of described bottom radial support and described inner container is 15 ° ~ 75 °.

4. the horizontal low temperature storage tank according to any one of claim 1-3, is characterized in that, the medial axis of described top radial support is positioned on the longitudinal central axis face of described inner container.

5. the horizontal low temperature storage tank according to any one of claim 1-3, is characterized in that, top radial support and the bottom radial support of described rear end supporting structure are fixed support, to make inner container relative with shell fixing;

Top radial support and the bottom radial support of described front support structure are movable supporting, to allow having axial relative movement between inner container and shell.

6. horizontal low temperature storage tank according to claim 5, is characterized in that, top radial support and the bottom radial support of described front support structure include:

Backing plate, is fixed on described inner container;

Cover plate, is fixed on described shell, with positioning ring on it;

Cylindrical support, one end is limited in the positioning ring of described cover plate, and the other end movable supporting is on described backing plate, and cylindrical support and backing plate are axially can relative motion along inner container.

7. horizontal low temperature storage tank according to claim 6, is characterized in that, the radial support place, top of described front support structure is also provided with two baffle plates;

Two baffle plates are parallel to the longitudinal central axis face of described inner container; Two baffle plates are arranged on described backing plate, form a limit track between two baffle plates, and this limit track and described cylindrical support are slidably matched.

8. the horizontal low temperature storage tank according to any one of claim 1-3, is characterized in that, described horizontal low temperature storage tank is transportable pressure vessel, and volume is not more than 15 cubes.

9. the horizontal low temperature storage tank according to any one of claim 1-3, is characterized in that, described horizontal low temperature storage tank is fixed pressurized container.