Heat insulation structure of high-temperature and high-pressure steam pipeline

Abstract

The utility model discloses a heat insulation structure of a high-temperature and high-pressure steam pipeline, which comprises a plurality of sections of composite heat insulation sleeves (1) and heat insulation strips (2) covered between the adjacent composite heat insulation sleeves (1), and heat insulation protective pipes (3) are arranged outside the composite heat insulation sleeves (1) and the heat insulation strips (2). A plurality of clamping teeth (21) are arranged on the surface of the heat preservation strip (2), a clamping buckle (22) connected with the clamping teeth (21) in a matched and clamped mode is arranged at one end of the heat preservation strip (2), and the heat preservation strip (2) sequentially comprises a first waterproof layer (23), a soft heat preservation layer (24), a heat reflecting layer (25) and a second waterproof layer (26) from inside to outside. The heat preservation sleeve has the advantages of improving the heat preservation effect of the heat preservation sleeve connecting part and prolonging the service life.

Description

Technical Field

[0001] The utility model relates to a steam pipeline, in particular to a heat insulation structure of a high-temperature and high-pressure steam pipeline. Background Art

[0002] There are a large number of pipelines used to transport high-temperature and high-pressure steam in thermal power plants. Traditional steam pipelines generally use soft insulation materials or high-temperature resistant cement to insulate the pipelines, but the insulation effect of such a single insulation structure is relatively general. In particular, since the total length of the steam pipeline is generally long, it is necessary to connect the steam pipelines of shorter lengths by welding or flange connection. Therefore, the insulation sleeve is usually installed in sections. However, due to the single structure of the existing insulation sleeve, heat loss is easily caused at the joints where the insulation sleeves are connected, resulting in poor insulation effect. After long-term use, the heat loss area will become larger, causing the insulation effect of the insulation sleeve to gradually decrease. Therefore, the existing pipeline insulation structure has the problem of heat loss easily caused at the connection parts and short service life. Utility Model Content

[0003] The purpose of the utility model is to provide a heat insulation structure for a high-temperature and high-pressure steam pipeline. The utility model has the characteristics of improving the heat insulation effect of the connection part of the heat insulation sleeve and extending the service life.

[0004] The technical solution of the utility model: a heat insulation structure for a high-temperature and high-pressure steam pipeline, comprising a plurality of sections of composite insulation sleeves and insulation strips covering adjacent composite insulation sleeves, a heat insulation protection tube is arranged outside the composite insulation sleeves and the insulation strips; a plurality of teeth are arranged on the surface of the insulation strips, a buckle is arranged at one end of the insulation strips for engaging with the teeth, and the insulation strips comprise, from the inside to the outside, a first waterproof layer, a soft insulation layer, a heat reflecting layer and a second waterproof layer.

[0005] In the aforementioned thermal insulation structure of the high-temperature and high-pressure steam pipeline, extension strips extending toward the composite insulation sleeve are provided on both sides of the insulation strip, and the inner side of the extension strip is connected to the composite insulation sleeve via Velcro.

[0006] In the aforementioned thermal insulation structure of the high-temperature and high-pressure steam pipeline, a limiting ring belt is provided between the two extension strips.

[0007] In the aforementioned thermal insulation structure of the high-temperature and high-pressure steam pipeline, the composite insulation sleeve includes a clay insulation layer, an inorganic insulation layer and a polyurethane foam layer from the inside to the outside, and the surface of the clay insulation layer is provided with a waterproof nano coating.

[0008] In the aforementioned thermal insulation structure of the high-temperature and high-pressure steam pipeline, one side of the clay insulation layer, the inorganic insulation layer and the polyurethane foam layer are each provided with a plurality of connecting grooves, and the other side of the clay insulation layer, the inorganic insulation layer and the polyurethane foam layer are each provided with a plurality of connecting protrusions corresponding to the connecting grooves.

[0009] In the aforementioned thermal insulation structure of the high-temperature and high-pressure steam pipeline, the joints between the clay insulation layer, the inorganic insulation layer and the polyurethane foam layer are staggered with each other.

[0010] In the aforementioned heat insulation structure of the high-temperature and high-pressure steam pipeline, a felt surface is provided on one side of the outer surface of the polyurethane foam layer, and a sticky wool strip is provided on the other side of the outer surface of the polyurethane foam layer.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model adopts a composite insulation sleeve to wrap the outside of the steam pipe, and adopts insulation strips to cover the joints of multiple insulation strips, so as to strengthen the insulation function of the connection structure between the insulation sleeves, which can effectively reduce heat leakage and loss, and then protect it through the heat insulation protection pipe to form a multi-layer insulation protection structure to improve the insulation effect; the insulation strip is wrapped between two adjacent composite insulation sleeves, and is fixed by means of clamping teeth and buckles, so as to improve the installation tightness of the composite insulation sleeve and the insulation strip, facilitate installation, reduce installation gaps, and reduce heat loss; the insulation strip adopts a soft insulation layer, which can meet good covering performance and is not easy to cause heat loss; and the heat reflection layer is used to reflect the lost heat into the steam pipe again, so as to reduce heat loss, minimize the heat dissipation of the high-temperature and high-pressure steam pipe, and improve the thermal efficiency of the system; the first waterproof layer and the second waterproof layer are used to prevent the water vapor inside the steam pipe and the water vapor in the external environment from damaging the insulation strip, so as to increase the service life.

[0013] The utility model has the characteristics of improving the heat preservation effect of the connection part of the heat preservation sleeve and prolonging the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a schematic diagram of the unfolded structure of the insulation strip.

[0016] Figure 3 It is a structural diagram of the cross section of the insulation strip.

[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of the composite thermal insulation sleeve.

[0018] Figure 5 It is a schematic diagram of the unfolded structure of the polyurethane foam layer.

[0019] The markings in the attached drawings are: 1. composite insulation sleeve; 11. clay insulation layer; 12. inorganic insulation layer; 13. polyurethane foam layer; 14. connecting groove; 15. connecting protrusion; 16. felt surface; 17. adhesive strip; 2. insulation strip; 21. latch; 22. buckle; 23. first waterproof layer; 24. soft insulation layer; 25. heat reflecting layer; 26. second waterproof layer; 27. extension strip; 28. limiting ring belt; 3. thermal insulation protection tube. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Example:

[0023] like Figure 1-Figure 5 As shown, the thermal insulation structure of the high-temperature and high-pressure steam pipeline includes several sections of composite insulation sleeves 1 and insulation strips 2 covering adjacent composite insulation sleeves 1, and a thermal insulation protection tube 3 is provided on the outside of the composite insulation sleeves 1 and the insulation strips 2; the surface of the insulation strip 2 is provided with a plurality of teeth 21, and one end of the insulation strip 2 is provided with a buckle 22 that cooperates with the teeth 21, and the insulation strip 2 includes a first waterproof layer 23, a soft insulation layer 24, a heat reflecting layer 25 and a second waterproof layer 26 from the inside to the outside.

[0024] The utility model adopts a composite insulation sleeve 1 to wrap the outside of the steam pipe, adopts an insulation strip 2 to cover the joints of multiple insulation strips 2, and then uses an insulation protection tube 3 for protection, adopts a multi-layer insulation protection structure to improve the insulation effect; the insulation strip 2 is wrapped between two adjacent composite insulation sleeves 1, and is fixed by a clamping tooth 21 and a buckle 22, so as to improve the installation tightness of the composite insulation sleeve 1 and the insulation strip 2, facilitate installation, reduce installation gaps, and reduce heat loss; the insulation strip 2 adopts a soft insulation layer 24, which can meet good covering performance, so that the joints of the composite insulation sleeve 1 have good sealing performance and are not easy to cause heat loss; and the heat reflection layer 25 is used to reflect the lost heat into the steam pipe again, so as to reduce heat loss; the first waterproof layer 23 and the second waterproof layer 26 are used to prevent the water vapor inside the steam pipe and the water vapor in the external environment from damaging the insulation strip 2, so as to improve the service life.

[0025] The heat reflection layer 25 can be made of multiple layers of stacked aluminum foil reflection layers, and the soft insulation layer 24 can be made of a rubber insulation layer, a glass wool insulation layer, etc.

[0026] Both sides of the insulation strip 2 are provided with extension strips 27 extending toward the composite insulation sleeve 1, and the inner side of the extension strip 27 is connected to the composite insulation sleeve 1 through Velcro. When the insulation strip 2 wraps the composite insulation sleeve 1, the extension strip 27 is connected to the composite insulation sleeve 1 to improve the installation stability.

[0027] A limiting ring band 28 is provided between the two extension strips 27. When the insulation strip 2 is wrapped around and installed, one end of the insulation strip 2 passes through the limiting ring band 28 and is then fixed by the clamping teeth 21 and the buckle 22, thereby improving the installation stability and accuracy and avoiding deviation.

[0028] The composite thermal insulation sleeve 1 includes a clay thermal insulation layer 11, an inorganic thermal insulation layer 12 and a polyurethane foam layer 13 from the inside to the outside, and a waterproof nano coating is provided on the surface of the clay thermal insulation layer 11. By coating the clay thermal insulation layer 11 with a waterproof nano coating on the innermost side of the composite thermal insulation sleeve 1, the water vapor overflowing from the steam pipe can be isolated first, and the water vapor can be prevented from causing the loss of the polyurethane foam layer 13. The inorganic thermal insulation layer 12 has good stability and can relatively well stabilize the structure of the clay thermal insulation layer 11 and the polyurethane foam layer 13, avoiding deformation and affecting the comprehensive coverage of the pipeline and causing heat loss; the polyurethane foam layer 13 has good thermal insulation performance, and can also absorb and disperse pressure when subjected to compression force, and reduce the impact of external forces on other thermal insulation components.

[0029] The clay insulation layer 11, the inorganic insulation layer 12 and the polyurethane foam layer 13 are provided with a plurality of connection grooves 14 on one side, and the clay insulation layer 11, the inorganic insulation layer 12 and the polyurethane foam layer 13 are provided with a plurality of connection protrusions 15 correspondingly connected to the connection grooves 14 on the other side. Through the connection between the connection protrusions 15 and the connection grooves 14, the composite insulation sleeve 1 is not easily twisted and dislocated after installation. The joints of the clay insulation layer 11, the inorganic insulation layer 12 and the polyurethane foam layer 13 are staggered with each other, so that each insulation layer forms a staggered structure, which effectively reduces heat loss.

[0030] A plurality of felt surfaces 16 are provided on one side of the outer surface of the polyurethane foam layer 13, and a plurality of adhesive strips 17 are provided on the other side of the outer surface of the polyurethane foam layer 13. The adhesive strips 17 and the felt surfaces 16 are adhered and fixed to the composite thermal insulation cover 1, and the adhesive strips 17 can cover the connection grooves 14 of the polyurethane foam layer 13, thereby improving the thermal insulation effect.

[0031] The parts not described in detail in the present invention are prior art and thus will not be described in detail here.

Claims

1. The thermal insulation structure of the high-temperature and high-pressure steam pipeline is characterized by: The invention comprises a plurality of sections of composite thermal insulation sleeves (1) and thermal insulation strips (2) covering adjacent composite thermal insulation sleeves (1); a thermal insulation protection tube (3) is arranged outside the composite thermal insulation sleeves (1) and the thermal insulation strips (2); a plurality of latch teeth (21) are arranged on the surface of the thermal insulation strips (2); a latch (22) is arranged at one end of the thermal insulation strips (2) for latching with the latch teeth (21); and the thermal insulation strips (2) comprise, from the inside to the outside, a first waterproof layer (23), a soft thermal insulation layer (24), a heat reflecting layer (25) and a second waterproof layer (26).

2. The heat insulation structure of the high-temperature and high-pressure steam pipeline according to claim 1 is characterized in that: Extension strips (27) extending in the direction of the composite thermal insulation sleeve (1) are provided on both sides of the thermal insulation strip (2), and the inner side of the extension strip (27) is connected to the composite thermal insulation sleeve (1) via Velcro.

3. The heat insulation structure of the high-temperature and high-pressure steam pipeline according to claim 2 is characterized in that: A limiting ring belt (28) is provided between the two extension strips (27).

4. The heat insulation structure of the high-temperature and high-pressure steam pipeline according to claim 1, characterized in that: The composite thermal insulation sleeve (1) comprises, from the inside to the outside, a clay thermal insulation layer (11), an inorganic thermal insulation layer (12) and a polyurethane foam layer (13), and the surface of the clay thermal insulation layer (11) is provided with a waterproof nano coating.

5. The heat insulation structure of the high-temperature and high-pressure steam pipeline according to claim 4, characterized in that: A plurality of connection grooves (14) are provided on one side of the clay thermal insulation layer (11), the inorganic thermal insulation layer (12) and the polyurethane foam layer (13), and a plurality of connection protrusions (15) corresponding to the connection grooves (14) are provided on the other side of the clay thermal insulation layer (11), the inorganic thermal insulation layer (12) and the polyurethane foam layer (13).

6. The heat insulation structure of the high-temperature and high-pressure steam pipeline according to claim 5, characterized in that: The joints between the clay thermal insulation layer (11), the inorganic thermal insulation layer (12) and the polyurethane foam layer (13) are staggered with each other.

7. The heat insulation structure of the high-temperature and high-pressure steam pipeline according to claim 5, characterized in that: One side of the outer surface of the polyurethane foam layer (13) is provided with a felt surface (16), and the other side of the outer surface of the polyurethane foam layer (13) is provided with a wool adhesive strip (17).

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