Cold insulation pipe with multi-layer composite structure

Abstract

The utility model provides a cold insulation pipe with a multi-layer composite structure, which comprises an inner pipeline, a heat insulation layer pipe sleeved on the outer surface of the inner pipeline, a heat preservation layer pipe sleeved on the periphery of the heat insulation layer pipe, a damp-proof layer pipe sleeved on the outer surface of the heat preservation layer pipe, a protective layer pipe sleeved on the periphery of the damp-proof layer pipe, and a fixing component arranged in the protective layer pipe. The heat insulation layer pipe is made of aerogel felt. During use, heat invasion is blocked for polyurethane foam through the heat preservation layer pipe, then external impact can be prevented from damaging the internal structure through the protection layer pipe, detachable assembly is achieved through the fixing assembly arranged in the protection layer pipe, installation and maintenance are convenient, the damp-proof layer pipe can be pressed tightly during installation, radial constraining force can be provided, and the service life of the damp-proof layer pipe is prolonged. And displacement of the multi-layer structure due to thermal expansion and cold contraction or vibration is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to cold insulation pipe technical field, concretely relates to a cold insulation pipe of multilayer composite structure. BACKGROUND

[0002] In many industries such as energy chemical industry, food processing, biological medicine, long-distance transportation and storage of low-temperature medium (such as liquefied natural gas, liquid oxygen, liquid nitrogen, etc.) is the key link to guarantee production operation. As the core equipment for isolating external heat transfer and maintaining the temperature stability of low-temperature medium in the pipe, the performance of cold insulation pipe is directly related to the quality of medium, transportation efficiency and safety of the system. For example, in the transportation process of liquefied natural gas (LNG), if the cold insulation effect is poor, LNG will gasify by absorbing external heat, which not only causes energy waste, but also may cause safety accidents due to sudden increase of pressure in the pipeline. In the cold chain logistics industry, the heat preservation performance of cold insulation pipe directly affects the quality of frozen food and medicine. If the temperature fluctuation is too large, the product will deteriorate, causing huge economic losses.

[0003] However, most of the current cold insulation pipes have low cold insulation efficiency, lack effective displacement resistance, mostly rely on adhesives, are prone to aging and failure, and the heat preservation layer has no supporting structure, which collapses and deforms after long-term pressure, and the cold insulation performance drops sharply. SUMMARY

[0004] The utility model provides a cold insulation pipe of multilayer composite structure to solve the problems in the background art.

[0005] The specific technical scheme is as follows:

[0006] A cold insulation pipe of multilayer composite structure comprises an inner pipeline, a heat insulation layer pipe is sleeved on the outer surface of the inner pipeline, a heat preservation layer pipe is sleeved on the outer periphery of the heat insulation layer pipe, a moisture-proof layer pipe is sleeved on the outer surface of the heat preservation layer pipe, a protective layer pipe is sleeved on the outer periphery of the moisture-proof layer pipe, a fixing assembly is arranged in the protective layer pipe, and the heat insulation layer pipe is made of aerogel felt.

[0007] As a preferred scheme of the utility model, the heat preservation layer pipe is made of polyurethane foam, the moisture-proof layer pipe is made of butyl rubber, and the heat preservation layer pipe is embedded with a spiral support ring.

[0008] As a preferred scheme of the utility model, the protective layer pipe is a stainless steel pipeline, the protective layer pipe is composed of four segment pipes, and a connecting block is fixedly connected to the upper surface of each adjacent segment pipe, and the fixing assembly comprises a rotating shaft, and the rotating shaft is rotatably installed between the plurality of segment pipes in the protective layer pipe.

[0009] As a preferred scheme of the utility model, the first clamping ring and the second clamping ring are respectively rotationally connected with the both sides of the rotating shaft, and the inner wall of the first clamping ring and the second clamping ring is respectively bonded with a soft rubber block.

[0010] As a preferred scheme of the utility model, the both sides of the first clamping ring and the second clamping ring are respectively bonded with a sealing strip, and the second clamping ring and the first clamping ring are respectively provided with the same threaded hole at one end of the lower surface.

[0011] As a preferred scheme of the utility model, the threaded hole is threadedly connected with a mounting bolt, the first clamping ring and the second clamping ring are closed by screwing the mounting bolt, and the soft rubber block is used to compress the moisture-proof layer pipe.

[0012] The utility model has the following beneficial effects:

[0013] 1. The cold insulation pipe with the multi-layer composite structure has the following beneficial effects: the heat conduction caused by air convection can be reduced by the aerogel felt heat insulation layer pipe during use, the heat exchange between the inner pipe and the outside is effectively blocked, the low-temperature fluid circulating in the inner pipe is not affected, the heat invasion is blocked by the polyurethane foam heat preservation layer pipe, the performance of the heat preservation layer pipe is not reduced due to the deformation caused by the pressure, the moisture-proof layer pipe is made of butyl rubber and has high air tightness and water resistance, the moisture in the outside is prevented from penetrating into the heat preservation layer pipe and the heat insulation layer pipe, the heat conductivity is prevented from being increased due to the condensation of the moisture, the cold insulation performance of the inner pipe is effectively improved by the design of the heat insulation layer pipe and the moisture-proof layer pipe, the internal structure is prevented from being damaged by the external impact by the protective layer pipe, the detachable assembly is realized by the fixing assembly arranged in the protective layer pipe, the installation and maintenance are facilitated, the moisture-proof layer pipe is compressed during installation, the radial restraint force is provided, and the displacement of the multi-layer structure caused by thermal expansion and contraction or vibration is prevented.

[0014] 2. The cold insulation pipe with the multi-layer composite structure has the following beneficial effects: the rotating shaft, the soft rubber block and the sealing strip are designed, when the multi-layer structure is installed on the surface of the inner pipe, the protective layer pipe is inserted into the periphery of the multi-layer structure, then the first clamping ring and the second clamping ring are connected by the mounting bolt, the soft rubber block in the inner wall is compressed to the moisture-proof layer pipe, the pressure is sequentially transmitted to the heat insulation layer pipe, the multi-layer structure can be stably fixed on the outer surface of the inner pipe, the cold insulation effect of the inner pipe is not affected by the loosening and misplacement of the multi-layer structure caused by external factors, the sealing strip is compressed to fill the gap between the clamping rings, the double-layer sealing is realized, the external impurities are prevented from entering, the four-section pipe of the protective layer pipe is designed and fixedly connected by the connecting block, so the four-section pipe is not rotated due to the design of the rotating shaft, the position deviation during the installation of the protective layer pipe is avoided, the fixing effect of the first clamping ring is not affected, the adhesive bonding is not needed, and the anti-displacement ability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The whole structure schematic diagram of the cold-keeping pipe with the multi-layer composite structure provided by the embodiment of the present application is shown in the figure.

[0016] Figure 2 The heat insulation layer structure schematic diagram of the cold-keeping pipe with the multi-layer composite structure provided by the embodiment of the present application is shown in the figure.

[0017] Figure 3 The spiral support ring structure schematic diagram of the cold-keeping pipe with the multi-layer composite structure provided by the embodiment of the present application is shown in the figure.

[0018] Figure 4 The fixed assembly structure schematic diagram of the cold-keeping pipe with the multi-layer composite structure provided by the embodiment of the present application is shown in the figure.

[0019] Figure 5 The sealing strip structure schematic diagram of the cold-keeping pipe with the multi-layer composite structure provided by the embodiment of the present application is shown in the figure.

[0020] Figure 6 The soft rubber block structure schematic diagram of the cold-keeping pipe with the multi-layer composite structure provided by the embodiment of the present application is shown in the figure.

[0021] In the drawings:

[0022] 1, inner pipe; 101, heat insulation layer pipe; 102, heat preservation layer pipe; 103, moisture-proof layer pipe; 104, spiral support ring;

[0023] 2, protective layer pipe; 201, connecting block;

[0024] 3, fixed assembly; 301, rotating shaft; 302, first clamping ring; 303, second clamping ring; 304, soft rubber block; 305, sealing strip; 306, mounting bolt. DETAILED DESCRIPTION

[0025] The technical scheme of the present application will be further described below in combination with the drawings and through specific embodiments.

[0026] Among them, the drawings are only used for example explanation, and the representation is only a schematic diagram, not a real object diagram, and cannot be understood as a limitation of the present patent; in order to better illustrate the embodiment of the present application, some components of the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some known structures and their descriptions in the drawings can be omitted.

[0027] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Example 1

[0030] The multi-layer composite structure cold insulation pipe provided in this embodiment, such as Figures 1-6 As shown, it includes: an inner pipe 1, an insulation layer pipe 101 sleeved on the outer surface of the inner pipe 1, a heat insulation layer pipe 102 sleeved around the heat insulation layer pipe 101, a moisture-proof layer pipe 103 sleeved on the outer surface of the heat insulation layer pipe 102, a protective layer pipe 2 sleeved around the moisture-proof layer pipe 103, and a fixing component 3 inside the protective layer pipe 2. The heat insulation layer pipe 101 is made of aerogel felt. The heat insulation layer pipe 102 is made of polyurethane foam. The moisture-proof layer pipe 103 is made of butyl rubber. A spiral support ring 104 is embedded inside the heat insulation layer pipe 102.

[0031] Through the design of the protective layer tube 2, fixing component 3, and moisture-proof layer tube 103, the aerogel felt insulation layer tube 101 can reduce heat conduction caused by air convection during use, effectively blocking heat exchange between the inner pipe 1 and the outside, ensuring that the low-temperature fluid flowing inside the inner pipe 1 is not affected. The insulation layer tube 102, made of polyurethane foam, blocks heat intrusion, while the embedded spiral support ring 104 prevents the insulation layer tube 102 from deforming under pressure and reducing its performance. The moisture-proof layer tube 103, made of butyl rubber, has high airtightness and water resistance, and can block... External moisture seeps into the insulation layer pipe 102 and the heat insulation layer pipe 101, preventing the thermal conductivity from increasing due to moisture condensation. The design of the heat insulation layer pipe 101 and the moisture-proof layer pipe 103 and the insulation layer pipe 102 effectively improves the cold insulation performance of the inner pipe 1. The protective layer pipe 2 can prevent external impacts from damaging the internal structure. The fixing component 3 inside the protective layer pipe 2 enables detachable assembly, which is convenient for installation and maintenance. During installation, it can press the moisture-proof layer pipe 103 to provide radial restraint force and prevent the multi-layer structure from shifting due to thermal expansion and contraction or vibration.

[0032] Example 2

[0033] The multi-layer composite structure cold insulation pipe provided in this embodiment, such as Figures 3-6 As shown, the system includes: a protective layer pipe 2 made of stainless steel, consisting of four pipe segments, with connecting blocks 201 fixedly connected to the upper surfaces of adjacent pipe segments; a fixing assembly 3 including a rotating shaft 301 rotatably mounted between the multiple pipe segments in the protective layer pipe 2; a first clamping ring 302 and a second clamping ring 303 rotatably connected to both sides of the rotating shaft 301; and soft rubber blocks 304 adhered to one side of the inner wall of both the first and second clamping rings 302 and 303. Sealing strips 305 are adhered to both sides of the first and second clamping rings 302 and 303, respectively. The second and first clamping rings 303 have identical threaded holes at one end of their lower surfaces. Mounting bolts 306 are threaded into the threaded holes, and tightening the mounting bolts 306 closes the first and second clamping rings 302, thus pressing the moisture-proof layer pipe 103 together with the soft rubber blocks 304.

[0034] By rotating shaft 301, soft rubber block 304, sealing strip 305 design, when the multi-layer structure is installed on the surface of inner pipeline 1, by inserting protective layer pipe 2 into the periphery of the multi-layer structure, then connecting first clamping ring 302 and second clamping ring 303 by installing bolt 306, and screwing it closed, the soft rubber block 304 of its inner wall is pressed tightly to moisture-proof layer pipe 103, and the pressure is transmitted to heat insulation layer pipe 101 in turn, so that the multi-layer structure can be stably fixed on the outer surface of inner pipeline 1, and the cold insulation effect of inner pipeline 1 will not be affected by external factors causing the multi-layer structure to loosen and dislocate, and at the same time, sealing strip 305 is pressed to fill the gap between the clamping rings, realizing double sealing, preventing external impurities from entering, and the four-section pipe design of protective layer pipe 2 is fixed by connecting block 201, so that the four-section pipe will not rotate due to the design of rotating shaft 301, so that the positional deviation during installation of protective layer pipe 2 can be avoided to affect the fixing effect of first clamping ring 302, and the displacement resistance is improved without relying on adhesive bonding.

[0035] In summary, the multi-layer composite structure cold insulation pipe provided by the embodiment has the following advantages: the multi-layer composite structure can improve the cold insulation efficiency of the pipeline, and the compression force of the fixing assembly 3 directly suppresses the interlayer sliding caused by thermal expansion and contraction or vibration to improve the displacement resistance effect, and the spiral support ring 104 can improve the support capacity of the heat preservation layer pipe 102 to avoid deformation caused by long-term pressure and affect the cold insulation performance.

[0036] In use, when heat insulation layer pipe 101, heat preservation layer pipe 102 and moisture-proof layer pipe 103 are installed on the surface of inner pipeline 1, protective layer pipe 2 is inserted into the periphery of the multi-layer structure, then first clamping ring 302 and second clamping ring 303 are connected by installing bolt 306, and the rotating shaft 301 is screwed closed, the soft rubber block 304 of its inner wall is pressed tightly to moisture-proof layer pipe 103, and the pressure is transmitted to heat insulation layer pipe 101 in turn, so that the multi-layer structure can be stably fixed on the outer surface of inner pipeline 1, and at the same time, sealing strip 305 is pressed to fill the gap between the clamping rings, realizing double sealing, preventing external impurities from entering, and the four-section pipe design of protective layer pipe 2 is fixed by connecting block 201, so that the four-section pipe will not rotate due to the design of rotating shaft 301, so that the positional deviation during installation of protective layer pipe 2 can be avoided to affect the fixing effect of first clamping ring 302, and the cold insulation efficiency can be improved by the multi-layer structure design.

[0037] The above is only the preferred embodiment of the present application, and does not limit the implementation and protection scope of the present application. For those skilled in the art, it should be realized that any equivalent replacement and obvious changes made according to the content of the present application can be included in the protection scope of the present application.

Claims

1. A cold-insulating tube of a multilayer composite structure, characterized by, Include: The inner pipeline (1), the outer surface of the inner pipeline (1) is sleeved with a heat insulation layer pipe (101), the outer periphery of the heat insulation layer pipe (101) is sleeved with a heat preservation layer pipe (102), the outer surface of the heat preservation layer pipe (102) is sleeved with a moisture-proof layer pipe (103), the outer periphery of the moisture-proof layer pipe (103) is sleeved with a protective layer pipe (2), the protective layer pipe (2) is provided with a fixing assembly (3) in the inside, and the heat insulation layer pipe (101) is made of aerogel felt.

2. The multiwall composite structure cold pipe of claim 1, wherein, The heat preservation layer pipe (102) is made of polyurethane foam, the moisture-proof layer pipe (103) is made of butyl rubber, and the heat preservation layer pipe (102) is embedded with a spiral support ring (104).

3. The multiwall composite structure cold pipe of claim 1, wherein, The protective layer pipe (2) is a stainless steel pipe, the protective layer pipe (2) is composed of four segment pipes, and the upper surfaces of adjacent segment pipes are respectively fixedly connected with connecting blocks (201), and the fixing assembly (3) comprises a rotating shaft (301), and the rotating shaft (301) is rotatably installed between the plurality of segment pipes in the protective layer pipe (2).

4. The multiwall, composite structure, cold pipe of claim 3, wherein, The rotating shaft (301) is rotatably connected with a first clamping ring (302) and a second clamping ring (303) on both sides, respectively, the inner wall of the first clamping ring (302) and the second clamping ring (303) is adhered with a soft rubber block (304) on one side.

5. The multiwall composite structure cold pipe of claim 4, wherein, The first clamping ring (302) and the second clamping ring (303) are respectively adhered with a sealing strip (305) on both sides, and the second clamping ring (303) and the first clamping ring (302) are provided with the same threaded holes at one end of the lower surface.

6. The multiwall composite structure cold pipe of claim 5, wherein, The threaded holes are threadedly connected with mounting bolts (306), the first clamping ring (302) and the second clamping ring (303) are closed by tightening the mounting bolts (306), and the moisture-proof layer pipe (103) is pressed by the soft rubber block (304).

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