Thermal insulation device

Abstract

The utility model relates to a heat insulation device which comprises an outer sleeve and an inner sleeve arranged in the outer sleeve, and the inner side of the inner sleeve and the outer side of the outer sleeve respectively form a flow channel for fluid to pass through. The heat insulation device further comprises an insulation cavity arranged between the outer sleeve and the inner sleeve, and at least one deformable deformation tube is arranged on the sleeve closest to the hot fluid among the outer sleeve and the inner sleeve. According to the thermal insulation device, the thermal insulation effect is achieved through the thermal insulation cavity, and through the deformation pipe arranged on the sleeve closest to the thermal fluid, when the sleeve expands thermally, the deformation pipe can help release thermal stress and reduce the probability of structural fatigue failure, and meanwhile thermal displacement in the deformable direction can be compensated.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power or petroleum chemical industry field especially, and relates to a heat insulation device. BACKGROUND

[0002] At present, the equipment of nuclear power, petroleum chemical industry and the like has the problem of great temperature difference of outside fluid in partial area, and the great temperature difference will influence the heat exchange efficiency of fluid, increase heat loss, and not only this, the great temperature difference will produce great thermal stress, thermal expansion and thermal fatigue, and cause adverse effect to the stress of structure. The present solution means is to set up complex flow channel in the area with great temperature difference, and reduce the radial temperature difference of the area through the flow of cold fluid in the flow channel, but due to the complex structure of complex flow channel, the manufacturing and installation are difficult, and the structure is poor in stress release of thermal expansion. SUMMARY

[0003] The utility model solves the technical problem of providing a heat insulation device.

[0004] The utility model adopts the technical scheme that a kind of heat insulation device is constructed, including outer sleeve and the inner sleeve being arranged in the outer sleeve, the inner side of the inner sleeve and the outside of the outer sleeve respectively form the flow channel for fluid passing;

[0005] The heat insulation device further includes isolation cavity being arranged between the outer sleeve and the inner sleeve, and at least one deformable deformation pipe is arranged on the sleeve closest to hot fluid among the outer sleeve and the inner sleeve.

[0006] In some embodiments, the heat insulation device includes a plurality of deformation pipes, at least two deformation pipes are arranged axially spaced apart, and / or at least two deformation pipes are arranged radially stacked.

[0007] In some embodiments, the sleeve closest to hot fluid among the outer sleeve and the inner sleeve includes a plurality of cylindrical portions arranged axially spaced apart, and each deformation pipe is connected between two adjacent cylindrical portions.

[0008] In some embodiments, the deformation pipe includes a bellows.

[0009] In some embodiments, the bellows is provided with two opposite straight cylinder ends and a plurality of wave crests between the two straight cylinder ends.

[0010] The circumferential outer wall of the end of the cylindrical portion is provided with an annular groove for embedding the straight cylinder end.

[0011] In some embodiments, the isolation cavity is provided with heat insulation material.

[0012] And / or, one of the outer sleeve and the inner sleeve is provided with an air extraction port in communication with the isolation cavity; the isolation cavity forms a vacuum cavity through the air extraction port.

[0013] In some embodiments, the heat insulation device further comprises a connecting sleeve connected to at least one end of the outer sleeve, the connecting sleeve has a structural strength greater than that of the outer sleeve, and the connecting sleeve is provided with a connecting structure for connecting a preset flow channel.

[0014] In some embodiments, one of the outer sleeve and the inner sleeve is provided with a skirt portion on a circumferential side wall of one end thereof, and the skirt portion seals one side of the isolation cavity.

[0015] In some embodiments, the other end of the inner sleeve is connected to the other end of the outer sleeve through the connecting sleeve, and the connecting sleeve seals the other side of the isolation cavity.

[0016] In some embodiments, at least one of the outer sleeve, the inner sleeve, the connecting sleeve and the deformation tube is made of stainless steel or carbon steel.

[0017] In some embodiments, the heat insulation device has a straight line structure as a whole, or the heat insulation device has a curved line structure as a whole.

[0018] The heat insulation device of the present application has the following advantages: the heat insulation device of the present application plays a heat insulation role through the heat insulation cavity, and the deformation tube arranged on the sleeve closest to the hot fluid can help release thermal stress when the sleeve is thermally expanded, thereby reducing the probability of structural fatigue failure, and can compensate for thermal displacement in the deformable direction. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 is a structural schematic diagram of the isolation device in some embodiments of the present application;

[0021] Figure 2 is Figure 1 is an enlarged schematic diagram of the structure framed by the A frame in FIG.

[0022] REFERENCE NUMERALS:

[0023] Heat insulation device 100; outer sleeve 1; inner sleeve 2; cylindrical portion 21; annular groove 211; skirt portion 22; isolation cavity 3; heat insulation material 31; air extraction port 32; deformation tube 4; straight cylinder end 41; wave crest 42; connecting sleeve 5. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, objects and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or positional relationships shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the present technical solution, and do not indicate that the indicated device or element must have a particular direction, therefore it cannot be understood as a limitation on the present application.

[0025] It should be further pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing", "setting" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. When an element is referred to as "on" or "below" another element, the element can be "directly" or "indirectly" above the other element, or there can be one or more intervening elements. The terms "first", "second", "third" and the like are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, therefore, the features with "first", "second", "third" and the like can be explicitly or implicitly included one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In the following description, specific details such as specific system structures, techniques, etc. are presented for the purpose of illustration, not for the purpose of limitation, so as to thoroughly understand the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed description of well-known systems, devices, circuits and methods is omitted to avoid unnecessary details that hinder the description of the present application.

[0027] Reference can be made to Figure 1 The present application constructs a heat insulation device 100, mainly including an outer sleeve 1 and an inner sleeve 2 arranged in the outer sleeve 1, the inner side of the inner sleeve 2 and the outer side of the outer sleeve 1 form a flow channel for fluid, and hot fluid and cold fluid can flow through the inner side of the inner sleeve 2 and the outer side of the outer sleeve 1 respectively.

[0028] As Figure 1As shown, the heat insulation device 100 also includes an isolation cavity 3 disposed between the outer sleeve 1 and the inner sleeve 2, and at least one deformable tube 4 is provided on the sleeve closest to the hot fluid in the outer sleeve 1 and the inner sleeve 2.

[0029] For ease of explanation, the sleeve closest to the hot fluid will be referred to as the preset sleeve. Understandably, since the deformable tube 4 can deform, when the preset sleeve undergoes thermal expansion, the deformable tube 4 can release thermal stress, reducing the probability of structural fatigue failure, and simultaneously compensating for thermal displacement in the deformable direction. For example, in the illustrated embodiment, the deformable sleeve is disposed on the inner sleeve 2; therefore, the inner side of the inner sleeve 2 can be configured for the flow of hot fluid, and the outer side of the outer sleeve 1 for the flow of cold fluid.

[0030] The specific configuration of the heat insulation device 100 in some embodiments is described below.

[0031] The outer sleeve 1, as the load-bearing component of the entire heat insulation device 100, can be connected to other flow channels to receive hot / cold fluids. The outer sleeve 1 can be designed with a structural form matching the interface type of the external equipment; for example, when the interface type of the external equipment is internally threaded, the outer sleeve 1 can be designed with the same diameter and have external threads on its outer circumference. Alternatively, at least one connecting sleeve 5 with a structural strength greater than that of the outer sleeve 1 can be additionally provided. This connecting sleeve 5 is connected to the end of the outer sleeve 1 for connecting to a pre-defined flow channel; the connecting sleeve 5 can have a connecting structure such as threads for connecting to the pre-defined flow channel.

[0032] like Figure 1 As shown, the outer sleeve 1 and the inner sleeve 2 can be cylindrical. It can be understood that in the illustrated embodiment, the overall structure of the heat insulation device is a straight structure; however, the overall structure of the heat insulation device is not limited to this, and the overall structure of the heat insulation device can also be a curved structure, that is, a long strip structure with at least one curved part.

[0033] Secondly, the outer diameter of the inner sleeve 2 can be smaller than the inner diameter of the outer sleeve 1, and it is coaxially arranged with the outer sleeve 1 to form an annular isolation cavity 3.

[0034] In some embodiments, reference may be made to Figure 1 The isolation cavity 3 is equipped with a heat-insulating material 31, which is a material with a low thermal conductivity. In other embodiments, further reference may be made to... Figure 1 One of the outer sleeve 1 and the inner sleeve 2 is provided with an air extraction port 32 that communicates with the isolation chamber 3; by extracting air from the isolation chamber 3 through the air extraction port 32, a vacuum can be formed.

[0035] Understandably, the isolation chamber 3 may only be equipped with insulation material 31, or it may only be evacuated, or it may be equipped with both insulation material 31 and evacuated; no specific limitation is made here. By using insulation material 31 and / or evacuation to increase thermal resistance, heat transfer from the hot fluid to the cold fluid can be effectively prevented, thereby improving the insulation effect.

[0036] Secondly, to ensure the airtightness of the isolation cavity 3 and to facilitate the filling of the insulation material 31 into the isolation cavity 3, please refer to... Figure 1 The inner sleeve 2 may have a skirt 22 on its outer circumferential wall at one end. The skirt 22 is fixedly connected to one end of the outer sleeve 1, and the other end of the inner sleeve 2 is fixedly connected to the other end of the outer sleeve 1 through a connecting sleeve 5. The fixed connection method may include welding, riveting, etc.

[0037] Understandably, when assembling this heat insulation device 100, one end of the inner sleeve 2 with the skirt portion 22 can be connected to one end of the outer sleeve 1 to form a semi-closed isolation cavity 3. Then, heat insulation material 31 can be filled into the isolation cavity 3. Finally, the other end of the inner sleeve 2 and the other end of the outer sleeve 1 can be connected via the connecting sleeve 5.

[0038] In some other embodiments, the skirt portion 22 may also be provided at the outer sleeve 1; or, both ends of the inner sleeve 2 and the outer sleeve 1 may be connected by the skirt portion 22; or, both ends of the inner sleeve 2 and the outer sleeve 1 may be connected by the connecting sleeve 5, without specific limitation.

[0039] Next, examine the structure of the pre-set sleeve and continue reading. Figure 1 The pre-set sleeve may include multiple cylindrical portions 21 arranged axially at intervals; the deformable tube 4 is connected between two adjacent cylindrical portions 21. It can be noted that the deformable tubes 4 connected at different positions may have different or the same length, and no specific limitation is made here.

[0040] Understandably, the deformable tube 4 is generally placed where the thermal displacement tendency of the preset sleeve is severe. For example, when the insulation device is U-shaped, the deformable tube 4 can be placed at the bend of the preset sleeve; when the preset sleeve is connected to other flow channels, the deformable tube 4 can be placed at the connection point between the preset sleeve and other flow channels. The thickness of the deformable tube 4 can be adjusted according to the corrosion of the fluid and the possible pressure conditions during its service life. Secondly, single-layer or multi-layer deformable tubes 4 can be arranged radially according to the number of fatigue cycles.

[0041] In some embodiments, the deformable tube 4 may be a bellows. Since the bellows can deform in the axial and / or radial directions, it can compensate for the thermal displacement of the preset sleeve in the axial and / or radial directions. In other embodiments, the deformable tube 4 may also be a sleeve compensator.

[0042] Reference can be made to Figure 2 The corrugated pipe is provided with two opposite straight tube ends 41 and a plurality of wave crests 42 between the two straight tube ends 41. The number of wave crests 42 on the corrugated pipe can be adjusted according to the temperature difference of the fluid inside and outside, which is not specifically limited herein.

[0043] In order to realize the compact structure, as shown in Figure 2 two annular grooves 211 can be arranged on the circumferential outer walls of the two adjacent cylindrical portions 21 respectively, and the two straight tube ends 41 of the corrugated pipe are embedded in the two annular grooves 211 and fixedly connected; the fixed connection can be welding, riveting, etc. For example, the straight tube end 41 of the corrugated pipe can be sleeved on the annular groove 211 of the cylindrical portion 21 and welded on the cylindrical portion 21.

[0044] Optionally, the material of at least one of the outer sleeve 1, the inner sleeve 2, the connecting sleeve 5 and the corrugated pipe can be stainless steel or carbon steel. In some embodiments, the materials of the outer sleeve 1, the inner sleeve 2, the connecting sleeve 5 and the corrugated pipe are all stainless steel or carbon steel.

[0045] In summary, the heat insulation device 100 of the present application can be used for heat insulation of cold and hot fluids, wherein the device is simple to manufacture and install, compact in structure, has good heat insulation capacity, and can effectively release thermal stress and thermal expansion.

[0046] It can be understood that the above embodiments only express the preferred embodiments of the present application, which are described in detail and specifically, but should not be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and some modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, any equivalent transformation and modification within the scope of the claims of the present application should belong to the scope of the claims of the present application.

Claims

1. A thermal insulation device, characterized in that The heat insulation device comprises an outer sleeve (1) and an inner sleeve (2) arranged in the outer sleeve (1), and the inner side of the inner sleeve (2) and the outer side of the outer sleeve (1) form flow channels for fluid to pass through; The heat insulation device further comprises an isolation cavity (3) arranged between the outer sleeve (1) and the inner sleeve (2), and at least one deformable deformation tube (4) is arranged on the sleeve closest to the hot fluid among the outer sleeve (1) and the inner sleeve (2).

2. The insulating device of claim 1, wherein The heat insulation device comprises a plurality of deformation tubes (4); among the plurality of deformation tubes (4), at least two deformation tubes (4) are arranged axially spaced apart, and / or at least two deformation tubes (4) are arranged radially stacked.

3. The insulating device of claim 2, wherein, The sleeve closest to the hot fluid among the outer sleeve (1) and the inner sleeve (2) comprises a plurality of cylindrical portions (21) arranged axially spaced apart; each deformation tube (4) is connected between two adjacent cylindrical portions (21).

4. The insulating device of claim 3, wherein The deformation tube (4) comprises a bellows.

5. The insulating device of claim 4, wherein, The bellows is provided with two opposite straight cylinder ends (41) and a plurality of wave crests (42) between the two straight cylinder ends (41). The circumferential outer wall of the end of the cylindrical portion (21) is provided with an annular groove (211) for embedding the straight cylinder end (41).

6. The insulating device of claim 1, wherein The isolation cavity (3) is provided with a heat insulation material (31); And / or one of the outer sleeve (1) and the inner sleeve (2) is provided with an air outlet (32) communicating with the isolation cavity (3); the isolation cavity (3) forms a vacuum cavity through the air outlet (32).

7. The insulating device of claim 1, wherein The heat insulation device further comprises a connecting sleeve (5) connected to at least one end of the outer sleeve (1), the connecting sleeve (5) has a structural strength greater than that of the outer sleeve (1), and the connecting sleeve (5) is provided with a connecting structure for connecting a predetermined flow channel.

8. The insulating device of claim 7, wherein, One end of the circumferential side wall of one of the inner sleeve (2) and the outer sleeve (1) is provided with a skirt portion (22), which seals one side of the isolation cavity (3); And the other end of the inner sleeve (2) and the other end of the outer sleeve (1) are connected through the connecting sleeve (5), and the connecting sleeve (5) seals the other side of the isolation cavity (3).

9. The insulating device of claim 7, wherein, The material of at least one of the outer sleeve (1), the inner sleeve (2), the connecting sleeve (5) and the deformation tube (4) is stainless steel or carbon steel.

10. The insulating device of claim 1, wherein, The heat insulation device is linear in structure, or the heat insulation device is curved in structure.

Images