Low-temperature cold box supporting structure

Abstract

According to the low-temperature cold box supporting structure, the connecting rod with one end face concaving in the axial direction to form the cavity is arranged, the end face is connected with the inner wall of the cold box, the lug type support is arranged to be connected with the tower, and the lug type support is connected with the connecting rod, so that connection between the tower and the cold box is achieved; the cavity reduces the heat exchange area between the end face of the connecting rod and the inner wall of the cold box, so that the heat exchange capacity between the tower and the cold box is weakened, the heat insulation performance between the tower and the cold box is improved, and cold leakage of the tower and local frosting and dew condensation of the outer wall of the cold box body are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of connection structures, in particular to a low-temperature cold box supporting structure. Background Art

[0002] Vertical cryogenic cold boxes, key equipment in cryogenic separation processes, are primarily used in production facilities such as air separation and natural gas liquefaction. They primarily consist of a cold box body, a tower, and a supporting structure, with the cold box body and tower connected via the supporting structure. The tower primarily operates under cryogenic conditions, resulting in a significant temperature difference between the two ends of the supporting structure. Conventional technology readily allows heat exchange between the tower and the cold box body through the supporting structure, resulting in cooling of the tower and localized frost and condensation on the outer walls of the cold box body. Utility Model Content

[0003] The utility model provides a low-temperature cold box support structure, which optimizes the problem in the prior art that a tower is prone to heat exchange with a cold box body through the support structure, and can improve the thermal insulation performance between the tower and the cold box.

[0004] To achieve the above-mentioned purpose, the utility model provides a low-temperature cold box support structure, including a cold box, a tower and;

[0005] A connecting rod, one end surface of which is axially recessed to form a cavity, and the end surface of the connecting rod having the cavity is connected to the inner wall of the cold box;

[0006] An ear-type support is mounted on the tower and includes a mounting surface parallel to the axis of the connecting rod and connected to the connecting rod. Because the end surface of the connecting rod is axially recessed to form a cavity, the heat exchange area between the end surface and the inner wall of the cold box is reduced, thereby weakening the heat exchange capacity between the tower and the cold box and improving the thermal insulation performance between the tower and the cold box.

[0007] As an optional embodiment, a thermal insulation pad is further included, which is arranged between the connecting rod and the mounting surface. The thermal insulation pad is conducive to preventing heat exchange between the connecting rod and the ear support, thereby preventing the tower from cooling down.

[0008] As an optional embodiment, the material of the thermal insulation plate is glass fiber reinforced plastic. Glass fiber reinforced plastic has a low thermal conductivity coefficient, and the use of glass fiber reinforced plastic as the material of the thermal insulation plate helps to further prevent the tower from cooling down.

[0009] As an optional embodiment, the cavity extends axially from one end of the connecting rod to the other end. In this embodiment, the space between the cold box and the tower is connected to the cavity. When the space between the cold box and the tower is filled with insulation material and evacuated, the cavity can also be filled with insulation material and evacuated simultaneously.

[0010] As an optional embodiment, the connecting rod is made of square steel. Square steel has relatively flat sides, which helps to maintain a stable connection between the connecting rod and the ear-type support.

[0011] As an optional embodiment, the mounting surface and the connecting rod are connected via a connecting piece. The mounting surface and the connecting rod are connected via a connecting piece, which has a simple production process and a good connection effect.

[0012] As an optional embodiment, a connecting plate is further included, one side of which is attached to the cold box and the other side is connected to the end of the connecting rod. The connecting plate is helpful in reinforcing the connection between the cold box and the connecting rod, thereby preventing local strength loss of the cold box.

[0013] As an optional implementation, the connecting plate is welded to the cold box, the connecting rod is welded to the connecting plate, and the ear-type support is welded to the tower.

[0014] As an optional embodiment, the ear-type support includes a mounting portion and a connecting portion, the mounting portion being connected to the tower, the connecting portion being connected to the mounting portion, the connecting portion having the mounting surface, and the mounting portion and the tower having the same thickness. Because the tower operates under cryogenic conditions, one end of the mounting portion is connected to the tower, and the other end is connected to the inner wall of the cold box body via the connecting rod. The cold box body is at room temperature, and the temperature difference between the two ends is large, resulting in a large temperature gradient in the mounting portion. Using the same thickness for the mounting portion and the tower ensures a stable connection between the mounting portion and the tower.

[0015] As an optional embodiment, there are two connecting rods, each disposed on either side of the tower along a tangential direction; and two ear-type supports, each disposed on either side of the tower corresponding to the two connecting rods and connected to each of the two connecting rods. This embodiment improves the stability of the connection between the tower and the cold box.

[0016] One or more technical solutions provided by this utility model have at least the following technical effects or advantages:

[0017] The low-temperature cold box support structure of the present invention is configured to provide a connecting rod with an end face that is axially recessed to form a cavity, and the end face is connected to the inner wall of the cold box, an ear-type support is provided to connect the tower, and the ear-type support is connected to the connecting rod to achieve the connection between the tower and the cold box. The cavity reduces the heat exchange area between the end face of the connecting rod and the inner wall of the cold box, thereby weakening the heat exchange capacity between the tower and the cold box, improving the thermal insulation performance between the tower and the cold box, and is beneficial to preventing the tower from cooling and local frost and dew condensation on the outer wall of the cold box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of the present invention, and do not constitute a limitation of the embodiments of the present invention;

[0019] Figure 1 This is a schematic diagram of the support structure of the low-temperature cold box of the present invention;

[0020] Figure 2 for Figure 1 Schematic cross-sectional view of the medium and low temperature cold box support structure along the axial direction of the tower;

[0021] Figure 3 for Figure 1 Schematic cross-sectional view of the medium and low temperature cold box support structure along the axial direction of the connecting rod;

[0022] Figure 4 for Figure 1 A partial magnified view of the middle L area.

[0023] Description of Reference Numerals

[0024] Cold box-100; tower-200; low temperature cold box support structure-300;

[0025] Connecting rod-1; cavity-11;

[0026] Ear support-2; mounting portion-21; connecting portion-22; mounting surface-221;

[0027] Thermal insulation pad-3; connecting piece-4; connecting plate-5. DETAILED DESCRIPTION

[0028] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0029] In this utility model, the directions or positions indicated by "inside" and "outside" are based on the directions or positions shown in the accompanying drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not intended to limit the devices, elements, or components indicated to have a specific direction, or to be constructed or operated in a specific direction.

[0030] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0031] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; they can refer to direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0032] As a key piece of equipment in cryogenic separation processes, vertical cryogenic cold boxes are primarily used in production facilities such as air separation and natural gas liquefaction. They are manufactured entirely in-house and transported horizontally. A vertical cryogenic cold box primarily consists of a cold box body, a tower, and a support structure, with the cold box body and tower connected via the support structure. To withstand gravity loads and seismic loads under operating conditions, as well as inertial loads under transportation conditions, corresponding support structures are required for each part of the tower. The support components must withstand the inertial loads imposed by the tower and its accessories; under cryogenic cold box operating conditions, the support components must also withstand the gravity loads of the tower and cryogenic medium.

[0033] Example 1

[0034] See also Figures 1 to 4 ,in Figure 1 In order to place the low-temperature cold box in a horizontal transport state, this embodiment provides a low-temperature cold box support structure 300, comprising a cold box 100, a tower 200, a connecting rod 1, and an ear-type support 2. One end face of the connecting rod 1 is axially recessed to form a cavity 11, and the end face of the connecting rod 1 having the cavity 11 is connected to the inner wall of the cold box 100. The ear-type support 2 is provided on the tower 200, and the ear-type support 2 includes a mounting surface 221, which is provided parallel to the axis of the connecting rod 1, and the mounting surface 221 is connected to the connecting rod 1. Since the end face of the connecting rod 1 is axially recessed to form the cavity 11, the heat exchange area between the end face and the inner wall of the cold box 100 is reduced, thereby weakening the heat exchange capacity between the tower 200 and the cold box 100 and improving the thermal insulation performance between the tower 200 and the cold box 100.

[0035] Example 2

[0036] The low-temperature cold box support structure 300 of this embodiment, based on the first embodiment, further includes a thermal insulation pad 3, which is disposed between the connecting rod 1 and the mounting surface 221. The thermal insulation pad 3 helps prevent heat exchange between the connecting rod 1 and the ear support 2, thereby preventing the tower 200 from cooling.

[0037] Optionally, the material of the thermal insulation plate 3 is glass fiber reinforced plastic. Glass fiber reinforced plastic has a low thermal conductivity, and the use of glass fiber reinforced plastic as the material of the thermal insulation plate 3 helps to further prevent the tower 200 from cooling down. In addition, the material of the thermal insulation plate 3 can also be rubber, etc., and the material should be selected according to actual needs.

[0038] Optionally, the cavity 11 extends axially from one end of the connecting rod 1 to the other end. In this embodiment, the space between the cold box 100 and the tower 200 is connected to the cavity 11. When the space between the cold box 100 and the tower 200 is filled with insulation material and evacuated, the cavity 11 can also be filled with insulation material and evacuated simultaneously.

[0039] Optionally, the connecting rod 1 is made of square steel. Square steel has relatively flat sides, which helps maintain a stable connection between the connecting rod 1 and the ear-type support 2. Furthermore, the connecting rod 1 can also be a steel tube with a circular cross-section. It should be noted that the shape of the mounting surface 221 should be compatible with the surface of the connecting rod 1 that fits the mounting surface 221. For example, when the connecting rod 1 is a circular steel tube, the mounting surface 221 should be a cylindrical surface with the busbar arranged axially along the connecting rod 1 and concave inward.

[0040] Optionally, the mounting surface 221 is connected to the connecting rod 1 via a connector 4. Using the connector 4 to connect the mounting surface 221 and the connecting rod 1 simplifies the production process and provides a good connection effect. For example, the connector 4 can be a threaded connector 4 such as a bolt or screw, or a rivet. The choice of connector 4 in practice depends on the specific situation and is not limited in this embodiment.

[0041] Optionally, the low-temperature cold box support structure 300 further includes a connecting plate 5, one side of which is attached to the cold box 100 and the other side is connected to the end of the connecting rod 1. The connecting plate 5 helps to reinforce the connection between the cold box 100 and the connecting rod 1, preventing the local strength of the cold box 100 from decreasing.

[0042] Optionally, the connecting plate 5 is welded to the cold box 100, the connecting rod 1 is welded to the connecting plate 5, and the ear support 2 is welded to the tower 200. Compared with connection methods such as riveting, welding does not require penetrating the wall of the tower 200 or the cold box 100, which helps maintain the airtightness of the tower 200 and the cold box 100.

[0043] Optionally, the ear-type support 2 includes a mounting portion 21 and a connecting portion 22. The mounting portion 21 is connected to the tower 200, and the connecting portion 22 is connected to the mounting portion 21. The connecting portion 22 has a mounting surface 221, and the mounting portion 21 and the tower 200 have the same thickness. Because the tower 200 operates under cryogenic conditions, one end of the mounting portion 21 is connected to the tower 200, and the other end is connected to the inner wall of the cold box body 100 via the connecting rod 1. The cold box body 100 is at room temperature, and the temperature difference between the two ends is large. Therefore, a large temperature gradient exists in the mounting portion 21. Using the same thickness and material as the tower 200 ensures a stable connection between the mounting portion 21 and the tower 200. Furthermore, the mounting portion 21 and the tower 200 are made of the same material, thereby further improving the stability of the connection between the mounting portion 21 and the tower 200.

[0044] Optionally, there are two connecting rods 1, which are arranged on both sides of the tower 200 along the tangential direction of the tower 200; there are two ear-type supports 2, which are arranged on both sides of the tower 200 corresponding to the two connecting rods 1 and are respectively connected to the two connecting rods 1. This embodiment is conducive to improving the stability of the connection between the tower 200 and the cold box 100. The two connecting rods 1 can be as follows: Figure 2 The symmetrical arrangement shown relative to the tower 200 can also be symmetrical along the center axis of the tower 200. Furthermore, the number of connecting rods 1 and ear supports 2 can be four, six, or more to enhance the stability of the connection between the tower 200 and the cold box 100. Preferably, the axial direction of the connecting rod 1 is parallel to the direction of gravity.

[0045] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0046] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A low-temperature cold box support structure, comprising a cold box and a tower, characterized in that: Also includes: A connecting rod, one end surface of which is axially recessed to form a cavity, and the end surface of the connecting rod having the cavity is connected to the inner wall of the cold box; An ear-type support is provided on the tower, and the ear-type support includes a mounting surface, the mounting surface is provided parallel to the axis of the connecting rod, and the mounting surface is connected to the connecting rod.

2. A low temperature cold box support structure according to claim 1, characterized in that: It also includes a heat insulation pad, which is arranged between the connecting rod and the mounting surface.

3. A low temperature cold box support structure according to claim 2, characterized in that: The thermal insulation plate is made of glass fiber reinforced plastic.

4. The low-temperature cold box support structure according to claim 1, characterized in that: The cavity penetrates from one end of the connecting rod to the other end along the axial direction of the connecting rod.

5. The low-temperature cold box support structure according to claim 1, characterized in that: The connecting rod is square steel.

6. The low-temperature cold box support structure according to claim 2, characterized in that: The mounting surface is connected to the connecting rod via a connecting piece.

7. The low-temperature cold box support structure according to claim 1, characterized in that: It also includes a connecting plate, one side of which is connected to the cold box, and the other side of which is connected to the end of the connecting rod.

8. The low-temperature cold box support structure according to claim 7, characterized in that: The connecting plate is welded to the cold box, the connecting rod is welded to the connecting plate, and the ear-type support is welded to the tower.

9. The low-temperature cold box support structure according to claim 1, characterized in that: The ear-type support includes a mounting portion and a connecting portion, the mounting portion is connected to the tower, the connecting portion is connected to the mounting portion, the connecting portion has the mounting surface, and the mounting portion and the tower have the same thickness.

10. A low temperature cold box support structure according to any one of claims 1 to 9, characterized in that: There are two connecting rods, which are arranged on both sides of the tower along the tangential direction; there are two ear-type supports, which are arranged on both sides of the tower corresponding to the two connecting rods and are respectively connected to the two connecting rods.

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