CN113757488B

CN113757488B - Prepreg type pipeline heat preservation device, construction method and construction equipment thereof

Info

Publication number: CN113757488B
Application number: CN202111050915.XA
Authority: CN
Inventors: 张继承; 董会娜; 何凤霞; 张珂; 张东生; 刘喜宗; 陈帅; 李帅帅
Original assignee: Gongyi Van Research Yihui Composite Material Co Ltd
Current assignee: Gongyi Van Research Yihui Composite Material Co Ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2023-07-07
Anticipated expiration: 2041-09-08
Also published as: CN113757488A

Abstract

The invention relates to a prepreg type pipeline heat preservation device, a construction method and construction equipment thereof, which are wrapped outside a pipeline body and are characterized in that: the heat insulation mechanism is wrapped on the outer wall of the pipeline body through a sheet-shaped heat insulation piece or a strip-shaped heat insulation piece, and the outer protection mechanism is wrapped on the outer wall of the heat reflection mechanism through a sheet-shaped prepreg or a strip-shaped prepreg and then is solidified and formed. The method comprises the specific steps of paving a heat insulation mechanism, a heat reflection mechanism and uncured prepreg along the outer wall of a pipeline main body; the uncured prepreg is then cured by either ambient temperature or by heating with the heating mechanism of the construction equipment. The invention has good structural integrity, reduces heat loss during pipe network operation, and has simple and convenient construction method.

Description

Prepreg type pipeline heat preservation device, construction method and construction equipment thereof

Technical Field

The invention belongs to the technical field of heat preservation, and particularly relates to a prepreg type pipeline heat preservation device, a construction method and construction equipment thereof.

Background

In the industrial production processes of petroleum, chemical industry, metallurgy, electric power and the like, high-temperature medium pipeline transportation, such as high-temperature high-pressure steam, exists. In the heat transmission process, the heat preservation effect is poor, so that the heat loss along the path is serious, the great energy waste is caused, and the more serious consequence is that the temperature and the pressure of the steam point at the tail end cannot meet the production process requirement due to the fact that the heat loss along the path is too great, and the product quality is affected.

In recent years, with the development of heat insulation material technology, heat supply pipe network heat insulation structure technology has also been correspondingly developed. The heat-insulating structure of the heating pipeline at present at home is in the forms of felt, double-layer tiles, single-layer microporous calcium silicate tiles, single-layer section bars and the like, and rock wool (slag and cotton) and products thereof, glass wool and products thereof, hard-molded microporous calcium silicate heat-insulating products, aluminum silicate cotton and products thereof and the like are generally selected as heat-insulating materials. The long-distance conveying pipeline generally adopts an insulation structure formed by combining an inner microporous calcium silicate tile layer and an outer composite silicate felt soft material layer, but the inner microporous calcium silicate tile layer and the outer composite silicate felt soft material layer cannot form an organic whole, are used at a high temperature for a long time and are influenced by factors such as steam pressure fluctuation, hydraulic impact, artificial treading and the like in the pipeline, and the insulation material deforms, slides and sinks, so that the heat loss at the upper part of the insulation pipeline is increased. In addition, gaps exist at the butt joint positions of the multi-layer sectional materials, and after vibration, the gaps are increased, so that the heat preservation effect is greatly reduced. In addition, for the heat-insulating structure form of the pipe shell, the joint is generally a coating fixing joint, and although the heat-insulating material does not sink, the joint of the heat-insulating material is cracked more commonly, so that the heat loss is increased, and the heat-insulating effect is gradually deteriorated along with the extension of the service time.

Disclosure of Invention

In order to solve the problems, the invention provides the prepreg type pipeline heat preservation device, the construction method and the construction equipment thereof, the structural integrity of the pipeline heat preservation device is good, the heat loss during the operation of a pipe network is reduced, and the construction method is simple and convenient.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

the utility model provides a prepreg formula pipeline heat preservation device, wraps up in the outside of pipeline body, its characterized in that: the thermal insulation mechanism and the outer protection mechanism are sequentially arranged from inside to outside, the outer protection mechanism is made of prepreg, and the prepreg is wrapped outside the outer protection mechanism and is then solidified and formed.

Further, a heat reflection mechanism is further arranged between the heat insulation mechanism and the outer protection mechanism, the heat reflection mechanism is one of copper foil, aluminum foil and heat reflection paint, and the heat reflection paint can be obtained through commercial purchase.

Further, the heat insulation mechanism is wrapped on the outer wall of the pipeline body through a heat insulation piece, the heat insulation piece is an aerogel felt or a heat insulation hose, the heat insulation piece is further wrapped through a corrosion-resistant layer, the aerogel felt can be a sheet-shaped aerogel felt, a strip-shaped aerogel felt or a coiled aerogel felt, the corrosion-resistant layer comprises corrosion-resistant cloth or corrosion-resistant paint, the corrosion-resistant cloth is one of Teflon cloth, tetrafluoro cloth and polytetrafluoroethylene cloth, and the corrosion-resistant paint can be obtained through commercial purchase.

Further, the heat-insulating hose is a hose filled with heat-insulating filler; the heat preservation and insulation filler is one or a combination of more of aerogel powder, titanium dioxide particles, silicon dioxide particles, zinc oxide particles, hollow glass beads, white mica powder, corundum powder, mullite powder, hollow phenolic resin microspheres and hollow carbon microspheres, and the hose is one of a rubber hose and a silica gel hose.

Further, the prepreg is a matrix material impregnated with reinforcing fibers, wherein the reinforcing fibers are one of carbon fibers, glass fibers, aramid fibers, boron fibers, biological fibers, polyester fibers and polyamide fibers, and the matrix material is one of epoxy resin, phenolic resin and polyester resin.

A construction method of a prepreg type pipeline heat preservation device is characterized by comprising the following steps: the method comprises the following specific steps:

1) Paving a heat insulation mechanism along the outer wall of the pipeline main body, and surrounding the sheet-shaped heat insulation piece or the strip-shaped heat insulation piece into a cylinder with a continuous cylinder wall;

2) Paving uncured prepreg outside the heat insulation mechanism obtained in the step 1);

3) And (3) performing normal-temperature curing molding on the prepreg in the step (2) or performing heating curing molding through construction equipment.

Further, in the step 4), when the thermal curing molding is performed, one end of the prepreg is fixed on the surface of the heat insulation mechanism during laying of the uncured prepreg, and the construction equipment starts from the fixed end of the prepreg and heats and cures the laid prepreg along the pipeline body.

Further, the curing molding temperature is 25-160 ℃.

The construction equipment used in the construction method is characterized in that: the construction equipment comprises a cylinder body, a telescopic mechanism and a heating mechanism, wherein the telescopic mechanism and the heating mechanism are connected to the cylinder body, the cylinder body comprises a first cylinder body and a second cylinder body which are symmetrically arranged, the first cylinder body and the second cylinder body are two semi-cylindrical shells which are symmetrically arranged, one side wall of the first cylinder body and one side wall of the second cylinder body are mutually hinged, and the other side wall of the first cylinder body and the other side wall of the second cylinder body are fixed through bolts; the heating mechanism is driven by the cylinder to rotate at the outer wall of the laid prepreg and move along the direction of the pipeline body, the prepreg is heated and solidified on the surface of the prepreg, the heating mechanism comprises a heating roller and two connecting columns which are respectively connected to the end faces of the heating roller, the heating roller is also connected with a power supply and a temperature controller, and the heating mechanism is connected with the cylinder through the telescopic mechanism; the telescopic mechanism comprises a mounting seat and a hydraulic rod, the hydraulic rod is connected to the inner wall of the cylinder body through the mounting seat, and a through hole for the connecting column to pass through is reserved in the movable rod end of the hydraulic rod.

Further, the terminal surface of heated roll is connected the round platform of the feeding of being convenient for, and the top surface of round platform passes through the spliced pole is connected hydraulic stem, the generating line of round platform is 5~15 with the contained angle of axle.

The beneficial effects of the invention are as follows:

1. according to the prepreg type heat preservation device, the outer protection mechanism is wrapped by the uncured prepreg, the prepreg is cured and molded after wrapping is finished, and certain strength is generated after the prepreg is cured, so that the mechanical property of the whole pipeline heat preservation device can be improved; the heat insulation mechanism is directly coated or wound on the outer wall of the pipeline body through the heat insulation piece, so that the heat insulation effect is good;

2. the prepreg has strong designability, and can be laminated according to the thickness and mechanical property requirements of an external protection mechanism required by the pipeline heat preservation device under different environmental conditions, and the obtained external protection mechanism can adapt to different environmental requirements; the construction method of directly curing at normal temperature after on-site coating or performing heating curing through construction equipment can also simplify construction steps, can obtain the outer protection mechanism attached to the heat insulation mechanism without additional fixing pieces, does not have installation gaps, and saves construction time.

Drawings

FIG. 1 is a schematic view of a pipeline heat preservation device;

FIG. 2 is a schematic structural view of construction equipment;

FIG. 3 is a mating view of a first cylinder and a second cylinder;

FIG. 4 is a diagram showing the cooperation of the first cylinder with the heating mechanism and the telescoping mechanism;

FIG. 5 is a schematic view of a heating mechanism;

FIG. 6 is a schematic view of a telescopic mechanism;

fig. 7 is a schematic structural view of a hose filled with thermal insulation material.

Wherein, each reference sign in the figure is: 1. a cylinder; 101. a first cylinder; 102. a second cylinder; 2. a heating roller; 3. a connecting column; 4. a power supply; 5. a temperature controller; 6. rotating the handle; 7. a mounting base; 8. a hydraulic rod; 9. a through hole; 10. round bench; 11. a heat insulation mechanism; 12. a heat reflecting mechanism; 13. an outer protective mechanism; 14. thermal insulation materials; 15. and (3) a hose.

Detailed Description

In order that those skilled in the art will better understand the technical solutions provided by the present invention, the following description is made with reference to specific embodiments.

Example 1

Fig. 1 is a schematic structural diagram of a pipe heat insulation device, which is wrapped outside a pipe body to be insulated, specifically includes a heat insulation mechanism 11, a heat reflection mechanism 12 and an outer protection mechanism 13, which are arranged from inside to outside, wherein the heat insulation mechanism 11 and the outer protection mechanism 13 are both arranged in a form of directly wrapping with a sheet material or wrapping with a strip material after winding. The sheet-shaped heat insulating piece adopted by the heat insulating mechanism 11 is a sheet-shaped aerogel felt, and the periphery of the aerogel felt is coated with corrosion-resistant paint for protection in the using process. The outer protection mechanism 13 is a cured prepreg layer, the prepreg is a matrix material impregnated by reinforced fibers, wherein the reinforced fibers are one of carbon fibers, glass fibers, aramid fibers, boron fibers, biological fibers, polyester fibers and polyamide fibers, and the matrix material is polyester resin.

The construction method comprises the following specific steps:

1) A heat insulation mechanism 11 is paved along the outer wall of the pipeline main body, and the sheet-shaped heat insulation pieces or strip-shaped heat insulation pieces are all surrounded into a cylinder with continuous cylinder walls; when the heat insulation mechanism 11 is made of aerogel felt, the periphery of the aerogel felt is also coated with corrosion-resistant paint for protection in advance, and the aerogel felt is wrapped after the corrosion-resistant paint is firmly dried;

2) Paving a heat reflection mechanism 12 outside the heat insulation mechanism 11 obtained in the step 1);

3) Paving an uncured prepreg outside the heat reflection mechanism 12 obtained in the step 2);

4) The uncured prepreg in step 3) is cured directly outside the heat reflection mechanism 12.

Wherein, the base material of the prepreg is an unsaturated polyester material added with an initiator and an accelerator, wherein, the initiator adopts benzoyl peroxide, the accelerator adopts N, N-dimethylaniline, and the reinforcing fiber can select one of carbon fiber, glass fiber, aramid fiber, boron fiber, biological fiber, polyester fiber and polyamide fiber according to different strength requirements and different budget of a pipeline heat preservation device, and the prepreg is stored at a low temperature (usually below 4 ℃) after being prepared. When the prepreg is used, the prepreg is taken out from the low-temperature environment and rapidly wound outside the heat reflecting mechanism 12 (corresponding to the step 3), and the wound prepreg gradually tends to be normal temperature and is cured and molded at the normal temperature.

Example 2

The pipeline heat preservation device is provided with a heat insulation mechanism 11, a heat reflection mechanism 12 and an outer protection mechanism 13 from inside to outside. The heat insulation mechanism 11 can be wrapped by adopting a hose 15 filled with a heat insulation material 14, the heat insulation material 14 in the hose 15 filled with the heat insulation material 14 comprises one or more of aerogel powder, titanium dioxide particles, silicon dioxide particles, zinc oxide particles, hollow glass beads, white mica powder, corundum powder, mullite powder, hollow phenolic resin microspheres and hollow carbon microspheres, the hose 15 is one of a rubber hose, a silica gel hose and the like, and the outer wall of the hose 15 can be wrapped with a corrosion-resistant step or coated with a corrosion-resistant coating to realize corrosion protection. The outer protection mechanism 13 is a prepreg layer which is subjected to heating and curing, and the prepreg is glass fiber reinforced epoxy resin prepreg, specifically, the uncured prepreg is directly coated in a sheet shape or is arranged outside the heat reflection mechanism 12 in a strip winding and coating mode, and then the prepreg is subjected to heating and curing through construction equipment to generate certain strength, so that the mechanical property of the integral pipeline heat insulation device can be improved.

The construction method comprises the following specific steps:

1) A hose 15 as a heat insulation mechanism 11 is wound along the outer wall of the pipeline main body to form a cylinder with a continuous cylinder wall;

3) Cladding the uncured glass fiber reinforced epoxy resin prepreg outside the heat reflecting mechanism 12 obtained in the step 2), wherein one end of the prepreg is also fixed on the surface of the heat reflecting layer when cladding the uncured prepreg, and the prepreg is preferably laid continuously and seamlessly;

4) And 3) a heating mechanism of construction equipment keeps a certain temperature, rotates at the outer wall of the laid uncured prepreg and advances along the direction of the pipeline body, the surface of the laid prepreg in the step 3) is heated in a moving way through the construction equipment, the prepreg is heated and cured, and the heating and curing temperature is 130-140 ℃, so that the prepreg type pipeline heat preservation device is obtained. And when the prepreg is heated and cured, the construction equipment starts from the fixed end of the prepreg and heats and cures the laid prepreg along the pipeline body.

Fig. 2 and 3 are schematic structural views of construction equipment; the construction equipment in the step 4) comprises a cylinder body 1, a telescopic mechanism and a heating mechanism, wherein the telescopic mechanism and the heating mechanism are connected with the cylinder body 1, the cylinder body 1 comprises a first cylinder body 101 and a second cylinder body 102 which are symmetrically arranged, the first cylinder body 101 and the second cylinder body 102 are two semicircular cylinder-shaped shells which are symmetrically arranged, one side wall of the first cylinder body 101 and one side wall of the second cylinder body 102 are mutually hinged, and the other side wall of the first cylinder body is fixed through bolts; fig. 5 is a schematic structural diagram of a heating mechanism, the heating mechanism comprises a plurality of heating rollers 2 and a connecting column 3 connected to the end face of the heating rollers 2, one end of each heating roller 2 is connected with a round table 10 which is convenient for prepreg to enter construction equipment, the top face of the round table 10 is connected with a hydraulic rod 8 through the connecting column 3, an included angle between a bus of the round table 10 and a shaft is 5-15 degrees, and an inclined plane reserved on the side face of the round table 10 is used for buffering the space of prepreg which the prepreg just enters the construction equipment, so that uncured prepreg can enter smoothly, and the phenomenon that the prepreg is blocked at the construction equipment is avoided; the heating roller 2 can be an electric heating roller 2, the electric heating roller 2 is also connected with a power supply 4, a temperature controller 5 and a rotating handle 6, and also can be an electromagnetic heating roller 2 with better precision and matched facilities thereof, and the power supply 4, the temperature controller 5 and other matched facilities are also fixed on the outer surface of the cylinder body 1, so that the electric heating roller can rotate along with the rotation of the cylinder body 1, and the maneuverability of the electric heating roller is improved. The heating mechanism is connected with the cylinder body 1 through a telescopic mechanism. Fig. 6 is a schematic structural diagram of a telescopic mechanism, the telescopic mechanism comprises a mounting seat 7 and a hydraulic rod 8, the hydraulic rod 8 is connected to the inner wall of the cylinder body 1 through the mounting seat 7, and a through hole 9 for the connecting column 3 to pass through is reserved in the movable rod end of the hydraulic rod 8.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Example 3

The pipeline heat preservation device is integrally wrapped outside the pipeline body, and the heat insulation mechanism 11, the heat reflection mechanism 12 and the outer protection mechanism 13 are all in a cylindrical shape with continuous outer walls. The heat insulation mechanism 11 is wound by adopting a strip-shaped heat insulation piece, the strip-shaped heat insulation piece can be a cylindrical strip or a rectangular strip, the strip-shaped heat insulation piece is a rectangular strip commonly used, and the strip-shaped aerogel felt is also coated with corrosion-resistant paint for protection in the use process. The outer protective mechanism 13 is a cured carbon fiber reinforced phenolic resin prepreg.

A preparation method of a prepreg efficient heat-preserving pipeline comprises the following steps:

1) Coating corrosion-resistant paint on the periphery of the strip aerogel blanket, and then wrapping the pretreated aerogel blanket heat insulation layer on the outer side of the pipeline main body to obtain a heat insulation mechanism 11;

2) Coating a heat reflection mechanism 12 on the outer side of the heat insulation mechanism 11 obtained in the step 1);

3) Winding uncured carbon fiber reinforced phenolic resin prepreg at the end of the structure obtained in the step 2) along the length direction of the pipeline body;

4) And (3) simultaneously arranging movable construction equipment at the end part of the structure in the step (3), wherein the construction equipment is the same as that of the embodiment 2. And (3) paving carbon fiber reinforced phenolic resin prepreg along the length direction of the pipeline body by construction equipment, and heating and curing the carbon fiber reinforced phenolic resin prepreg to obtain the required prepreg high-efficiency heat-insulation pipeline.

The temperature of a heating roller 2 arranged in construction equipment is controlled to be 160 ℃, and uncured carbon fiber reinforced phenolic resin prepreg is cured under the rolling and high-temperature actions of the heating roller 2. The uncured prepreg is paved while being heated and cured along the length direction of the pipeline through construction equipment, and the heating roller is arranged, so that the prepreg can be shaped and stretched and cured, the outer protection mechanism prepared by the prepreg can be better attached to the outermost side of the pipeline heat insulation structure, the structure of the outer protection mechanism 13 is smooth, and the construction time is saved.

Example 4

The pipeline heat preservation device wraps the outside of the pipeline body to be preserved, and specifically comprises a heat insulation mechanism 11 and an outer protection mechanism 13 which are arranged from inside to outside, and does not comprise a heat reflection mechanism 12 and a corrosion-resistant coating outside the aerogel felt. The heat insulation device and the construction method of the heat insulation device are the same as those of the embodiment 1.

Example 5

The pipeline heat preservation device wraps the outside of the pipeline body to be preserved, and specifically comprises a heat insulation mechanism 11, a heat reflection mechanism 12 and an outer protection mechanism 13 which are arranged from inside to outside, and does not comprise the anti-corrosion coating outside the aerogel felt. The heat insulation device and the construction method of the heat insulation device are the same as those of the embodiment 1.

Claims

1. A construction method of a prepreg type pipeline heat preservation device is characterized by comprising the following steps: the method comprises the following specific steps:

1) A heat insulation mechanism (11) is paved along the outer wall of the pipeline main body, and the sheet-shaped heat insulation piece or the strip-shaped heat insulation piece is surrounded into a cylinder with a continuous cylinder wall;

2) Paving uncured prepreg outside the heat insulation mechanism (11) obtained in the step 1);

3) Performing normal-temperature curing molding on the prepreg obtained in the step 2) or performing heating curing molding through construction equipment;

in the step 3), during heating and curing molding, one end of the prepreg is fixed on the surface of the heat insulation mechanism (11) when the uncured prepreg is paved, and the construction equipment starts from the fixed end of the prepreg and heats and cures the paved prepreg along the pipeline body;

the pipeline heat preservation device is wrapped outside the pipeline body and comprises a heat insulation mechanism (11) and an outer protection mechanism (13) which are sequentially arranged from inside to outside, wherein the outer protection mechanism (13) is prepreg, and the prepreg is wrapped outside the heat insulation mechanism (11) on site and then subjected to normal-temperature curing molding or heating curing molding through construction equipment.

2. The construction method of the prepreg type pipeline heat preservation device according to claim 1, wherein the construction method comprises the following steps: and a heat reflection mechanism (12) is further arranged between the heat insulation mechanism (11) and the outer protection mechanism (13).

3. The construction method of a prepreg type pipe heat preservation apparatus according to claim 1 or 2, characterized in that: the heat insulation mechanism (11) is wrapped on the outer wall of the pipeline body through a heat insulation piece, and the heat insulation piece is an aerogel felt or a heat insulation hose; the heat insulating piece is further wrapped by a corrosion-resistant layer.

4. A method of constructing a prepreg tubing insulation apparatus according to claim 3, wherein: the heat-insulating hose is a hose filled with heat-insulating filler; the heat preservation and insulation filler (14) is one or a combination of more of aerogel powder, titanium dioxide particles, silicon dioxide particles, zinc oxide particles, hollow glass beads, white mica powder, corundum powder, mullite powder, hollow phenolic resin microspheres and hollow carbon microspheres; the hose (15) is one of a rubber hose and a silica gel hose.

5. The construction method of the prepreg type pipeline heat preservation device according to claim 1, wherein the construction method comprises the following steps: the prepreg is a matrix material impregnated with reinforcing fibers; the reinforced fiber is one of carbon fiber, glass fiber, aramid fiber, boron fiber, biological fiber, polyester fiber and polyamide fiber; the matrix material is one of epoxy resin, phenolic resin and polyester resin.

6. The construction method of the prepreg type pipeline heat preservation device according to claim 1, wherein the construction method comprises the following steps: the temperature of the solidification forming is 25-160 ℃.

7. Construction equipment according to claim 1, characterized in that: the construction equipment comprises a cylinder body (1) and a telescopic mechanism and a heating mechanism which are connected with the cylinder body (1), wherein the cylinder body (1) comprises a first cylinder body (101) and a second cylinder body (102) which are symmetrically arranged, the first cylinder body (101) and the second cylinder body (102) are two semicircular cylinder-shaped shells which are symmetrically arranged, one side wall of the first cylinder body (101) and one side wall of the second cylinder body (102) are mutually hinged, and the other side wall of the first cylinder body and the other side wall of the second cylinder body are fixed through bolts; the heating mechanism is driven by the cylinder body (1) to rotate at the outer wall of the laid prepreg and move along the direction of the pipeline body, the prepreg is heated and solidified on the surface of the prepreg, the heating mechanism comprises a plurality of heating rollers (2) and connecting columns (3) connected to the end faces of the heating rollers (2), the heating rollers (2) are also connected with a power supply (4), a temperature controller (5) and a rotating handle (6), and the heating mechanism is connected with the cylinder body (1) through the telescopic mechanism; the telescopic mechanism comprises a mounting seat (7) and a hydraulic rod (8), the hydraulic rod (8) is connected to the inner wall of the cylinder body (1) through the mounting seat (7), and a through hole (9) for the connecting column (3) to pass through is reserved in the movable rod end of the hydraulic rod (8).

8. The construction equipment according to claim 7, wherein: the end face of the heating roller (2) is connected with a round table (10) which is convenient for feeding, the top surface of the round table (10) is connected with the hydraulic rod (8) through the connecting column (3), and the included angle between a bus of the round table (10) and a shaft is 5-15 degrees.