Heat preservation structure of ultrahigh-pressure heat supply pipeline

Abstract

The utility model discloses an ultrahigh-pressure heat supply pipeline heat preservation structure in the technical field of external heat supply of thermal power plants. The ultrahigh-pressure heat supply pipeline heat preservation structure comprises heat preservation materials, a heat preservation sleeve, a fixed lantern ring and a waterproof cover. According to the utility model, the problems that the combination of heat preservation and economy needs to be optimized and the processing and maintenance are inconvenient are solved; by means of the sectional type heat preservation structure and the heat preservation sleeve formed by sleeving the multiple layers of heat preservation pipes from inside to outside, the heat preservation structure is more convenient to install, only the damaged heat preservation sleeve needs to be detached and replaced during maintenance, and the maintenance cost is reduced; meanwhile, the gaps are formed in the thermal insulation pipe, the gaps of the thermal insulation pipe only need to be fully paved with the thermal insulation material during processing, the thickness of the thermal insulation material does not need to be manually adjusted, and the processing difficulty is reduced; besides, on the premise that the temperature drop of the ultrahigh-pressure heat supply pipeline is guaranteed, the heat preservation thickness is effectively reduced, the heat preservation effect is stable, and the effect of optimizing the comprehensive cost of the heat preservation structure of the ultrahigh-pressure heat supply pipeline is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of external heat supply of thermal power plants, in particular to a superhigh pressure heat supply pipeline heat preservation structure. BACKGROUND

[0002] The application of superhigh pressure heat supply steam (pressure 9.8 MPa or above, temperature 500 DEG C or above) from heat source points (thermal power plants, etc.) to heat users in different industries such as chemical industry is obtained. When the superhigh pressure heat supply steam is delivered from the heat source points (thermal power plants, etc.) to the heat user interface, the temperature drop requirement of the pipeline needs to be guaranteed, and under this premise, how to effectively combine the heat preservation characteristics of different heat preservation materials and their various costs to achieve the optimization of the comprehensive cost of the superhigh pressure heat supply pipeline heat preservation structure becomes the key.

[0003] As disclosed in patent No. CN110239152B, "a multi-layer composite light heat preservation structure for high-temperature steam pipeline", solves the problems of serious heat loss and poor heat preservation effect of the existing heat preservation structure for high-temperature steam pipeline. The heat preservation structure comprises a heat insulation structure and a sealing structure, and the two heat insulation structures are sleeved on the steam pipeline, and the sealing structure is sleeved at the joint of the heat insulation structure. The heat insulation structure comprises, from inside to outside, a heat insulation medium layer filled with a high-temperature heat insulation coating, a high-temperature heat reflection layer, a nano aerogel heat insulation layer a, a medium-temperature heat reflection layer, a basic heat insulation heat insulation layer a, a compressible barrier layer and a rigid bearing layer a, and the sealing structure comprises, from inside to outside, a basic heat insulation heat insulation layer b, a rigid bearing layer b, a nano aerogel heat insulation layer b and a protective layer.

[0004] As disclosed in patent No. CN218719738U, "a composite heat insulation type heat preservation and corrosion resistant hot steam pipeline", comprising a working steel pipe and an outer protective layer, a heat insulation layer is arranged between the working steel pipe and the outer protective layer, and the heat insulation layer is a gas gel layer, a high-temperature glass cotton felt layer, a microporous calcium silicate layer and a long-distance heat network special anti-radiation layer from the working steel pipe to the outer protective layer. By improving the heat preservation layer, the existing heat preservation layer is changed to two layers of aerogel + one layer of high-temperature glass cotton felt + one layer of microporous calcium silicate + long-distance heat network special anti-radiation layer, which can effectively reduce the loss in heat transfer.

[0005] Therefore, at present, the heat preservation structure sacrifices part of the economy under the premise of ensuring the heat preservation effect, at the same time, the processing and thickness control of the heat preservation material in the heat preservation structure are mainly processed and controlled by manual, there is a certain error, and most of them are integrated design, which is relatively inconvenient and expensive in later maintenance. Therefore, the current technology mainly has the problems of optimization of the combination of heat preservation and economy and inconvenience of processing and maintenance. UTILITY MODEL CONTENTS

[0006] The utility model discloses a purpose lies in providing a kind of superhigh pressure heat supply pipeline heat preservation structure, to solve the combination of heat preservation and economy in the background art proposed needs optimization and the problem of inconvenient processing and maintenance.

[0007] To achieve the above object, the utility model provides the following technical scheme: a kind of superhigh pressure heat supply pipeline heat preservation structure, including heat preservation material, heat preservation sleeve and fixed collar;

[0008] The heat preservation sleeve is provided with multiple groups, and each group of heat preservation sleeve is formed by a plurality of heat preservation pipes from inside to outside, and the multiple groups of heat preservation sleeves are arranged along the length direction of the working pipe.

[0009] The adjacent two groups of heat preservation sleeves are detachably connected by the fixed collar.

[0010] The heat preservation pipe is provided with a gap, and the heat preservation material is installed in the gap of the heat preservation pipe.

[0011] The heat preservation material is sequentially from inside to outside a nano aerogel layer, an aluminum silicate needle punching blanket and a high-temperature glass wool layer.

[0012] Preferably, the heat preservation pipe includes a heat preservation pipe outer plate, a heat preservation pipe gap separation plate and a heat preservation pipe inner plate, the heat preservation pipe gap separation plate is detachably installed between the heat preservation pipe outer plate and the heat preservation pipe inner plate, and the cavity composed of the heat preservation pipe outer plate, the heat preservation pipe gap separation plate and the heat preservation pipe inner plate contains the heat preservation material.

[0013] Preferably, the heat preservation pipe outer plate and the heat preservation pipe inner plate outer surface on the interface of each layer of heat preservation material are covered with a reflective layer, which is sequentially from inside to outside a high-temperature resistant reflective layer, a medium-temperature resistant reflective layer and a common reflective layer.

[0014] Preferably, the heat preservation pipe outer plate, the heat preservation pipe gap separation plate and the heat preservation pipe inner plate are all flexible deformable rings with the head portion telescopically fitted into the tail portion.

[0015] Preferably, the aluminum silicate needle punching blanket is provided with two layers, and the high-temperature glass wool layer is provided with four layers.

[0016] Preferably, the high-temperature resistant reflective layer is provided with two layers, the medium-temperature resistant reflective layer is provided with two layers, and the common reflective layer is provided with three layers.

[0017] Preferably, waterproof covers are installed at both ends of the working pipe.

[0018] Preferably, the heat preservation pipe outer plate of the heat preservation pipe located in the outermost layer is a color steel plate.

[0019] Compared with the prior art, the utility model discloses the beneficial effect is: the utility model discloses the installation of heat preservation structure is more convenient through setting up segmented heat preservation structure and the heat preservation sleeve that sets up by multilayer heat preservation sleeve, and only needs to replace the heat preservation sleeve of disassembling damage when maintaining, saves the maintenance cost of heat preservation structure, simultaneously, the gap is equipped with heat preservation pipe, only needs to spread the gap of heat preservation pipe with heat preservation material when processing, does not need manual regulation the thickness of heat preservation material, reduces the processing difficulty, in addition, the heat preservation structure that the utility model provides can reduce the heat preservation thickness under the premise of guaranteeing the temperature drop of ultrahigh pressure heat supply pipeline, and the stable heat preservation effect plays the role of optimizing the comprehensive cost of ultrahigh pressure heat supply pipeline heat preservation structure. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be to the embodiment description needed to use the drawing briefly introduces, obviously, the following description in the drawing is only some embodiments of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0021] Figure 1 It is the structure schematic diagram of the utility model;

[0022] Figure 2 It is the exploded view of the utility model parts;

[0023] Figure 3 It is the heat preservation sleeve inner heat preservation material structure assembly drawing of the utility model;

[0024] Figure 4 It is the heat preservation pipe structure schematic diagram of the utility model;

[0025] Figure 5 It is the heat preservation pipe sectional view of the utility model.

[0026] 1, nanometer aerogel layer;2, aluminum silicate needle blanket;201, first aluminum silicate needle blanket;202, second aluminum silicate needle blanket;3, high-temperature glass wool layer;301, first high-temperature glass wool layer;302, second high-temperature glass wool layer;303, third high-temperature glass wool layer;304, fourth high-temperature glass wool layer;4, working tube;5, high-temperature resistant reflective layer;501, first high-temperature resistant reflective layer;502, second high-temperature resistant reflective layer;6, medium-temperature resistant reflective layer;601, first medium-temperature resistant reflective layer;602, second medium-temperature resistant reflective layer;7, ordinary reflective layer;701, first ordinary reflective layer;702, second ordinary reflective layer;703, third ordinary reflective layer;8, color steel plate;9, waterproof cover;10, heat preservation pipe;1001, heat preservation pipe outer plate;1002, heat preservation pipe gap partition plate;1003, heat preservation pipe inner plate;11, fixed sleeve ring;12, bolt;13, nut. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] One embodiment of this utility model:

[0029] like Figures 1-5 As shown, it includes insulation material, waterproof cover 9, insulation sleeve and fixing collar 11;

[0030] Multiple sets of insulation sleeves are provided, which wrap around the outer surface of the working pipe 4 along its length. A fixing ring 11 is provided at the connection between two adjacent sets of insulation sleeves. If any insulation sleeve is damaged, the damaged insulation sleeve can be removed by removing the fixing ring 11 for repair. In addition, waterproof caps 9 are installed at the beginning and end of the working pipe 4. The waterproof caps 9 are adapted to the inner surface of the working pipe 4 and the outer surface of the insulation sleeve. They can be fitted onto the exposed surface of the insulation sleeve to prevent external liquids and contaminants from damaging the insulation material inside the insulation sleeve and to avoid a decrease in the insulation performance of the insulation structure.

[0031] Two sets of fixing collars 11 are provided, and the two sets of fixing collars 11 are connected by bolts 12 and nuts 13. The inner surface of the fixing collar 11 is adapted to the outer surface of the insulation sleeve. When any insulation sleeve is damaged, the fixing collar 11 can be removed by loosening the bolts 12 and nuts 13, and the damaged insulation sleeve can be removed for repair.

[0032] Each group of the heat preservation sleeve is formed by a plurality of heat preservation pipes 10 from inside to outside, the heat preservation pipe 10 comprises a heat preservation pipe outer plate 1001, a heat preservation pipe gap separation plate 1002 and a heat preservation pipe inner plate 1003, and the heat preservation pipe outer plate 1001, the heat preservation pipe gap separation plate 1002 and the heat preservation pipe inner plate 1003 are all flexible deformable rings with the head connected to the tail and the head sleeved in the tail telescopic opening, the diameter of the heat preservation pipe outer plate 1001, the heat preservation pipe gap separation plate 1002 and the heat preservation pipe inner plate 1003 can be adjusted by adjusting the overlap of the head and the tail telescopic opening cavity, and at the same time, the thickness of the heat preservation pipe gap separation plate 1002 is a fixed value, the height of the heat preservation pipe gap separation plate 1002 is less than the heat preservation pipe outer plate 1001 and the heat preservation pipe inner plate 1003, and the heat preservation pipe outer plate 1001, the heat preservation pipe gap separation plate 1002 and the heat preservation pipe inner plate 1003 form an open cavity with a required width by arranging the heat preservation pipe gap separation plate 1002 with a required thickness between the heat preservation pipe outer plate 1001 and the heat preservation pipe inner plate 1003, and then the heat preservation material is contained in the open cavity to form a heat preservation layer with a required thickness. At the same time, the heat preservation pipe gap separation plate 1002 is taken out after the heat preservation material is shaped in the open cavity, so that the continuity of the heat preservation material between each group of the heat preservation sleeve is ensured.

[0033] The heat preservation material contained between each layer of the heat preservation pipe outer plate 1001 and the heat preservation pipe inner plate 1003 is sequentially nano aerogel layer 1, aluminum silicate needle blanket 2 and high-temperature glass wool layer 3 from the working pipe 4. The nano aerogel layer 1 contains 10 layers, and the thickness of each layer is 10 mm, and the 10 layers of nano aerogel layer 1 are collectively installed in the innermost layer of the heat preservation pipe 10; the aluminum silicate needle blanket 2 is provided with two layers, and the thickness of each layer is 40 mm, which are first aluminum silicate needle blanket 201 and second aluminum silicate needle blanket 202, and the two layers of aluminum silicate needle blanket 2 are installed in two layers of heat preservation pipe 10; the high-temperature glass wool layer 3 is provided with four layers, and the thickness of each layer is 50 mm, which are first high-temperature glass wool layer 301, second high-temperature glass wool layer 302, third high-temperature glass wool layer 303 and fourth high-temperature glass wool layer 304, and the four layers of high-temperature glass wool layer 3 are installed in four layers of heat preservation pipe 10. In addition, the heat preservation pipe outer plate 1001 of the outermost layer of the heat preservation pipe 10 is a color steel plate 8, and the thickness of the color steel plate 8 is 0.7 mm.

[0034] The outer plate 1001 and the inner plate 1003 of the multi-layer insulation pipe 10 constituting the insulation sleeve are covered with a reflective layer, and from the working pipe 4 outward, there are a high-temperature-resistant reflective layer 5, a medium-temperature-resistant reflective layer 6 and a common reflective layer 7; wherein the outer surface of the outer plate 1001 and the inner plate 1003 at the interface between the nanometer aerogel layer 1 and the insulation material aluminum silicate needle blanket 2 is covered with a first high-temperature-resistant reflective layer 501; the outer surface of the outer plate 1001 and the inner plate 1003 at the interface between each layer of the insulation material aluminum silicate needle blanket 2 is covered with a second high-temperature-resistant reflective layer 502; the outer surface of the outer plate 1001 and the inner plate 1003 at the interface between the insulation material aluminum silicate needle blanket 2 and the high-temperature glass wool layer 3 is covered with a first medium-temperature-resistant reflective layer 601; the outer surface of the outer plate 1001 and the inner plate 1003 at the interface between each layer of the high-temperature glass wool layer 3 from inside to outside is sequentially covered with a second medium-temperature-resistant reflective layer 602, a first common reflective layer 701 and a second common reflective layer 702, and the inner side of the color steel plate 8 is covered with a third common reflective layer 703.

[0035] By installing waterproof covers 9 at the head and tail of the working pipe 4 which are adapted to the inner surface of the working pipe 4 and the outer surface of the insulation sleeve, the decrease or damage of the insulation performance of the insulation material caused by the entry of pollutants from both sides is prevented; the segmented insulation structure formed by multiple insulation sleeve groups and the insulation sleeve structure formed by the multi-layer insulation pipe 10 can only replace the damaged insulation material when the insulation material is damaged, thus saving the maintenance cost; the gap provided on the insulation pipe 10 for accommodating the insulation material only needs to adjust the gap width of the insulation pipe 10 during processing, without manual adjustment of the thickness of the insulation material, thus speeding up the construction speed, reducing the construction difficulty and avoiding human errors to a certain extent.

[0036] In addition, under the premise of ensuring the temperature drop of the superhigh-pressure heating pipeline and meeting the steam parameter requirements of the heat user interface, the thickness of the insulation structure and the cost of the insulation material are reduced, the energy-saving insulation effect is achieved, the economy of the insulation structure is considered, and the comprehensive cost of the superhigh-pressure heating pipeline insulation structure is optimized.

[0037] In the description of the specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The preferred embodiments disclosed above are only used to help describe the utility model. The preferred embodiments do not describe all the details and do not limit the utility model to the specific embodiments. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the persons skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the entire scope and equivalents thereof.

Claims

1. An ultra-high pressure heat supply pipeline insulation structure, characterized by: The heat preservation material, the heat preservation sleeve and the fixing ring (11); The heat preservation sleeve is provided with multiple groups, and each group of heat preservation sleeve is sleeved by multiple layers of heat preservation pipes (10) from inside to outside, and the multiple groups of heat preservation sleeves are arranged along the length direction of the working pipe (4); The adjacent two groups of heat preservation sleeves are detachably connected through the fixing ring (11); The heat preservation pipe (10) is provided with a gap, and the heat preservation material is installed in the gap of the heat preservation pipe (10); The heat preservation material is sequentially provided with a nano aerogel layer (1), an aluminum silicate needle punching blanket (2) and a high-temperature glass wool layer (3) from inside to outside.

2. An ultra-high pressure heating pipe insulation structure according to claim 1, characterized in that: The heat preservation pipe (10) comprises a heat preservation pipe outer plate (1001), a heat preservation pipe gap separation plate (1002) and a heat preservation pipe inner plate (1003), the heat preservation pipe gap separation plate (1002) is detachably installed between the heat preservation pipe outer plate (1001) and the heat preservation pipe inner plate (1003), and the cavity composed of the heat preservation pipe outer plate (1001), the heat preservation pipe gap separation plate (1002) and the heat preservation pipe inner plate (1003) contains the heat preservation material.

3. An ultra-high pressure heating pipe insulation structure according to claim 2, characterized in that: The outer surfaces of the heat preservation pipe outer plate (1001) and the heat preservation pipe inner plate (1003) on the interfaces of the layers of the heat preservation material are covered with a reflective layer, which is sequentially provided with a high-temperature resistant reflective layer (5), a medium-temperature resistant reflective layer (6) and a common reflective layer (7) from inside to outside.

4. The ultra-high pressure heating pipe insulation structure according to claim 2, characterized in that: The heat preservation pipe outer plate (1001), the heat preservation pipe gap separation plate (1002) and the heat preservation pipe inner plate (1003) are all flexible and deformable rings which are connected in a telescopic manner with the head part sleeved in the tail part.

5. The ultra-high pressure heating pipe insulation structure according to claim 1, characterized in that: The aluminum silicate needle punching blanket (2) is provided with two layers, and the high-temperature glass wool layer (3) is provided with four layers.

6. An ultra-high pressure heating pipe insulation structure according to claim 3, characterized in that: The high-temperature resistant reflective layer (5) is provided with two layers, the medium-temperature resistant reflective layer (6) is provided with two layers, and the common reflective layer (7) is provided with three layers.

7. The ultra-high pressure heating pipe insulation structure according to claim 1, characterized in that: The working pipe (4) is provided with waterproof covers (9) at both ends.

8. The ultra-high pressure heating pipe insulation structure according to claim 1, characterized in that: The heat preservation pipe outer plate (1001) of the outermost heat preservation pipe (10) is a color steel plate (8).

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