CN110181743B - Device and method for coating fiber reinforced foam heat insulation layer outside large-sized rotating body - Google Patents

Abstract

The invention discloses a device and a method for coating a fiber reinforced foam heat insulation layer outside a large rotating body, wherein the device comprises a running device and a single-sided coiled or napped sparse fabric, the running device comprises a bracket and a rotatable clamping mechanism arranged on the bracket, a tank body is clamped on the clamping mechanism, a guide rail is horizontally arranged on one side of the bracket, a working mechanism is slidably arranged on the guide rail, and a die and a spray gun are arranged on the working mechanism. Meanwhile, a layer of fabric is fixed on the surface of the finally formed foaming layer, and the coil of the fabric plays a role in hooking in the foam material, so that a composite body is formed by the fabric and the foam, the fabric and the coil play a role in enhancing the foam, and the overall strength is improved.

Description

Device and method for covering a large rotating body with a fiber-reinforced foam insulation layer

Technical field

The present invention relates to the technical field of liquefied gases, specifically a device and method for covering a large rotating body with a fiber-reinforced foam insulation layer.

Background technique

With the promotion of the use of liquefied gas, the use of low-temperature liquefied gas storage tanks is increasing. Since this kind of storage tank needs to be subjected to pressure, it is generally designed as a rotating body. Among them, cylinders and spheres are relatively easy to manufacture with reasonable stress, such as cylinders and spheres. In order to ensure safe storage, the liquefied gas in the storage tank needs to be at a very low temperature, which requires such storage tanks to be well insulated to prevent external temperature from transmitting into the tank. The existing thermal insulation materials with the most economic and practical value and relatively low thermal conductivity are micro-foam polymers, such as polystyrene foam, polyurethane foam, etc.

There are two main methods used today for covering foam insulation on similar large objects, assembly after molding and manual spraying on site. The former method is only suitable for large-scale batch production due to the mold relationship, while the latter method cannot guarantee the quality of the finished product and is inefficient. In addition, since most foam materials are low-strength materials, they themselves need reinforcement methods to ensure a good connection with the tank body. Inevitably, both of the above methods require additional structural reinforcement, which increases the manufacturing and weight reduction. Disadvantages. The purpose of the present invention is to solve the above problems.

Contents of the invention

The purpose of the present invention is to provide a device and method for covering a large rotating body with a fiber-reinforced foam insulation layer, so as to solve the problem in the above background technology that the quality of on-site manual foaming cannot be guaranteed, the molding module is not suitable for small batch production, and the existing method requires additional Added the problem of structural member reinforcement.

In order to achieve the above object, the present invention provides the following technical solution: a device for covering a large rotating body with a fiber-reinforced foam insulation layer, including an operating device and a single-sided coiled or fluffy sparse fabric, and the operating device includes a bracket. , and a rotatable clamping mechanism provided on the bracket, the tank is clamped on the clamping mechanism, a guide rail is horizontally installed on one side of the bracket, a working mechanism is slidably installed on the guide rail, and the working mechanism A mold and a spray gun are installed on the mold. One side of the mold is provided with a rotating curved surface that is parallel to the surface of the tank and has a radius of curvature larger than the radius of curvature of the tank. A rotary curved surface is formed between the rotating curved surface of the mold and the tank. The foaming cavity and the thermal curing cavity are arranged up and down, and the spray gun is installed at the top of the foaming cavity.

Preferably, the mold is provided with through holes for forming positive pressure and negative pressure on the surfaces of the foaming cavity and the thermal curing cavity, and the remaining surface of the thermal curing cavity around the through holes is a far-infrared heating element. .

Preferably, the bracket and the clamping mechanism are connected through a connecting rod, and a motor is provided at the connection point between the connecting rod and the clamping mechanism, and the output shaft of the motor is connected to the clamping mechanism.

Preferably, the rotational curved surface of the mold has the same rotational axis as the tank body, and the vertical distance from the tank rotational axis to the mold rotational curved surface is equal everywhere.

Preferably, the upper and lower edges of the rotating curved mold are arranged along the longitude of the tank, and the rotating curved surface of the mold has two sets of removable second baffles along the latitude of the tank. The rotating curved surface of the mold is located in the foaming cavity. There is a No. 1 baffle on the lower edge.

Preferably, the single-sided coiled or piled sparse fabric is placed between the tank and the mould.

Preferably, a method of covering a large rotating body with a fiber reinforced foam insulation layer includes the step of using an operating device to cover the large rotating body with a fiber reinforced foam insulation layer:

S1: Place the sparse fabric with coils on one side between the tank and the mold, with the coiled or fleece side facing the tank to be covered, rotate one side of the tank to the rotating curved surface of the mold and then fix it. The through hole in the molding cavity of the mold is in a negative pressure state, so that the single-sided coiled or fluffy sparse fabric is pushed by atmospheric pressure to adhere to a foaming cavity with an open upper end formed by the surface of the mold and the surface of the tank;

S2: The spray gun fills the foaming cavity with foaming material. After the foaming material is initially solidified, the through hole in the molding cavity is changed to a positive pressure state, and the next baffle is removed;

S3: Rotate the tank to be covered with the fiber-reinforced foam insulation layer, the rotation distance is equivalent to the arc length of the molding cavity, so that the arc length of the tank that has been filled with foam material enters the heat curing cavity of the mold. Far-infrared irradiation heats and solidifies. At the same time, the sparse fabric with coils on one side or fluffy fabric is also brought in with the rotation. After the rotation stops, the mold in the mold forming cavity turns to negative pressure, and the fabric is pushed by the atmospheric pressure to adhere to the mold. A new cavity is formed between the surface of the mold and the surface of the tank, which is repeatedly filled with foam material. After the surface of the foam material is dry, the through holes of the mold's molding cavity and the mold's heat curing cavity are turned to positive pressure, and the rotation is completed until the coating is completed. The fiber-reinforced foam insulation layer tank is equivalent to the arc length of the mold's molding cavity. This process is repeated until it approaches a circumference, and the remaining arc length is made up manually.

Preferably, after a circumference of the fiber-reinforced foam insulation layer is covered, the working mechanism can move along the guide rail by the width of the mold and repeat the processes of S1, S2 and S3.

The invention provides a device and method for coating a large rotating body with a fiber-reinforced foam insulation layer, which has the following beneficial effects:

In the present invention, since the perfusion is carried out in a fixed cavity and the curing is completed in a constant temperature environment, the foaming quality is fully guaranteed. At the same time, there is a layer of fabric fixed on the surface of the final foam layer, and the coils of the fabric play a connecting role in the foam material, so the fabric and the foam form a complex, and the fabric and coils play a role in reinforcing the foam. Therefore, the overall strength is greatly improved, and this method of covering the fiber-reinforced foam insulation layer outside the rotating body has high work efficiency and guaranteed quality.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the present invention;

Figure 2 is a schematic structural diagram of the present invention after removing the No. 2 baffle;

Figure 3 is a schematic rear structural view of the present invention.

In the picture: 1. Bracket; 2. Connecting rod; 3. Clamping mechanism; 4. Tank; 5. Spray gun; 6. Foaming cavity; 7. No. 1 baffle; 8. Mold; 9. Guide rail; 10 , through hole; 11. Heat curing cavity; 12. No. 2 baffle; 13. Far-infrared heating element; 14. Motor.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in Figures 1-3, the present invention provides a technical solution: a device and method for covering a large rotating body with a fiber-reinforced foam insulation layer, which is characterized in that it includes an operating device and a single-sided coil or generator. Plush sparse fabric, the operating device includes a bracket 1 and a rotatable clamping mechanism 3 arranged on the bracket 1. The clamping mechanism 3 holds a tank 4. One side of the bracket 1 A guide rail 9 is installed horizontally, a working mechanism is slidably installed on the guide rail 9, and a mold 8 and a spray gun 5 are installed on the working mechanism. One side of the mold 8 is provided with a structure parallel to the surface of the tank 4 and with a radius of curvature larger than the tank body. 4 is a curved surface of revolution with a radius of curvature larger than a fixed value. A foaming cavity 6 and a thermal curing cavity 11 are formed between the rotating curved surface of the mold 8 and the tank 4, and the foaming cavity 6 and the thermal curing cavity are 11 are arranged up and down, and the spray gun 5 is installed on the top of the foaming cavity 6 .

The mold 8 is provided with through holes 10 for forming positive and negative pressure on the surfaces of the foaming cavity 6 and the thermal curing cavity 11. The rest of the surface of the thermal curing cavity 11 around the through holes 10 is far away. The infrared heating element 13 uses the positive and negative pressure generated by the through hole 10 to absorb single-sided coiled or fluffy sparse fabrics; the bracket 1 and the clamping mechanism 3 are connected through a connecting rod 2, and the connecting rod 2 and A motor 14 is provided at the connection point of the clamping mechanism 3. The output shaft of the motor 14 is connected to the clamping mechanism 3, and the motor 14 is used to drive the clamping mechanism 3 to perform a spiral motion; the rotating curved surface of the mold 8 has a shape consistent with the can body. 4 have the same rotation axis, and the vertical distance from the rotation axis of the tank 4 to the rotating curved surface of the mold 8 is equal everywhere, so that the mold 8 wraps the tank 4 during the rotation; the upper and lower edges of the rotating curved surface of the mold 8 are along the The warp lines are arranged, and the rotating curved surface of the mold 8 has two sets of detachable No. 2 baffles 12 along the latitude of the tank 4. The rotating curved surface of the mold 8 is located at the lower edge of the foaming cavity 6 and is provided with the No. 1 baffle 7. Utilize The first baffle 7 and the second baffle 12 form a sealed cavity. The single-sided coiled or fluffy sparse fabric is placed between the tank 4 and the mold 8, between the tank 4 and the mold 8. The space is convenient for wrapping on the surface of the tank body 4.

It should be noted that when the device is working, the tank 4 to be processed is installed on the bracket 1 using the clamping mechanism 3. Before pouring the foaming material, a special single-sided tape is laid into the foaming cavity 6. The coiled or piled sparse fabric has the coiled or piled side facing the can 4 to be covered, and one end thereof is fixedly connected to the covered can 4 at the bottom of the foaming cavity 6, and then foamed The curved surface through hole 10 of the cavity 6 is under negative pressure. The single-sided coiled or fluffy sparse fabric is pushed by the atmospheric pressure and adsorbed on the curved surface of the foaming cavity 6. After it is stabilized and flattened, the spray gun 5 is then used to inject the foaming cavity into the cavity. 6 is filled with foam material until the upper edge is flush. After the foam material is initially solidified, change the through hole 10 in the molding cavity of mold 8 to a positive pressure state, and remove the next baffle 7; turn the fiber reinforcement to be coated The rotation distance of the tank 4 with the foam insulation layer is equivalent to the arc length of the molding cavity of the mold 8, so that the arc length of the tank 4 that has been filled with foam material enters the heat curing cavity 11 of the mold 8, and the distance is further extended. Infrared irradiation heats and solidifies. At the same time, the sparse fabric with coils on one side or fleece is also brought in with the rotation. After the rotation stops, the mold 8 in the molding cavity of the mold 8 turns to negative pressure, and the fabric is pushed by the atmospheric pressure to adhere to the mold. A new cavity is formed between the surface of mold 8 and the surface of tank 4. The foam material is filled repeatedly. After the surface of the foam material is dry, the through hole 10 of the molding cavity of mold 8 and the heat curing cavity 11 of mold 8 is turned to positive pressure. , rotate the fiber reinforced foam insulation layer tank 4 to be coated, which is equivalent to the arc length of the molding cavity of the mold 8, cycle this process until it approaches a circumference, and the remaining arc length is made up by hand, until the fiber reinforcement of a circumference After the foam insulation layer is covered, the working mechanism can move the width of the mold 8 along the guide rail 9 and repeat the processes of S1, S2 and S3. The rotating curved surface of the mold 8 is also a rotating curved surface like the tank 4 being processed and has the same characteristics as the processed tank 4. The similar rotation curve of the tank 4 is processed, but the rotation radius is larger than the tank by a fixed value, and the fixed value depends on the design thickness of the foam.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principles and spirit of the invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (4)

1. The device for coating the fiber reinforced foam heat insulation layer outside the large rotating body is characterized by comprising a running device and a single-sided coiled or fluffed sparse fabric, wherein the running device comprises a bracket (1) and a rotatable clamping mechanism (3) arranged on the bracket (1), a tank body (4) is clamped on the clamping mechanism (3), a guide rail (9) is horizontally arranged on one side of the bracket (1), a working mechanism is slidably arranged on the guide rail (9), a mould (8) and a spray gun (5) are arranged on the working mechanism, a rotating curved surface which is parallel to the surface of the tank body (4) and has a curvature radius which is larger than the curvature radius of the tank body (4) by a certain value is arranged on one side of the mould (8), a foaming cavity (6) and a heat curing cavity (11) are formed between the rotating curved surface of the mould (8) and the tank body (4), the foaming cavity (6) and the heat curing cavity (11) are arranged up and down, and the spray gun (5) is arranged at the top end of the foaming cavity (6);

the surfaces of the mold (8) positioned in the foaming cavity (6) and the heat curing cavity (11) are provided with through holes (10) for forming positive pressure and negative pressure, and the rest surfaces of the heat curing cavity (11) positioned around the through holes (10) are far infrared heating elements (13);

the sparse fabric with single-sided loops or napping is arranged between the tank body (4) and the die (8);

the rotating surface of the die (8) is provided with a rotating shaft which is the same as that of the tank body (4), and the vertical distance from the rotating shaft of the tank body (4) to the rotating surface of the die (8) is equal everywhere;

the upper edge and the lower edge of the rotating curved surface of the die (8) are arranged along the warp of the tank body (4), the rotating curved surface of the die (8) is provided with two groups of detachable second baffle plates (12) along the weft of the tank body (4), and the rotating curved surface of the die (8) is positioned at the lower edge of the foaming cavity (6) and is provided with a first baffle plate (7).

2. The apparatus for coating a fiber-reinforced foamed heat insulating layer on a large rotating body according to claim 1, wherein: the support (1) is connected with the clamping mechanism (3) through a connecting rod (2), a motor (14) is arranged at the joint of the connecting rod (2) and the clamping mechanism (3), and an output shaft of the motor (14) is connected with the clamping mechanism (3).

3. A method of coating a fiber reinforced foamed insulation layer on a large rotating body using the apparatus of claim 1, characterized by: the method comprises the steps of coating a fiber reinforced foam heat insulation layer outside a large rotating body by using a running device:

s1, placing a single-sided coiled sparse fabric between a tank body (4) and a mold (8), enabling one side with coils or raised wool to face the tank body (4) to be coated, rotating one side of the tank body (4) to a rotating curved surface of the mold (8) and then fixing, wherein a through hole (10) in a forming cavity of the mold (8) is in a negative pressure state, so that the single-sided coiled or raised wool sparse fabric is pushed by atmospheric pressure to be attached to a foaming cavity (6) with an open upper end formed by the surface of the mold (8) and the surface of the tank body (4);

s2, filling foaming materials into the foaming cavity (6) by the spray gun (5), changing a through hole (10) in a forming cavity of the die (8) into a positive pressure state after the foaming materials are primarily solidified, and removing a next baffle plate (7);

and S3, rotating the tank body (4) to be coated with the fiber reinforced foam heat insulation layer, wherein the rotating distance is equal to the arc length of a forming cavity of the die (8), enabling the section of arc length of the tank body (4) filled with foam material to enter a heat curing cavity (11) of the die (8), performing far infrared irradiation heating curing, simultaneously bringing sparse fabric with a coil or napping on one side into rotation, enabling the die (8) of the forming cavity of the die (8) to be converted into negative pressure after stopping rotating, enabling the fabric to be pushed by atmospheric pressure to be attached to the surface of the die (8) and the surface of the tank body (4) to form a new cavity, repeatedly filling foam material, enabling a through hole (10) of the forming cavity of the die (8) and a heat curing cavity (11) of the die (8) to be converted into positive pressure, rotating the tank body (4) to be equal to the arc length of the forming cavity of the die (8), and circulating the process until the rest section of arc length is approximately equal to one circumference, and manually making up for the rest section of arc length.

4. A method of coating a fiber reinforced foamed insulation layer over a large rotating body according to claim 3, wherein: after the coating of the fiber reinforced foam heat insulation layer with one circumference is completed, the working mechanism can move the width of one mold (8) along the guide rail (9), and the processes of S1, S2 and S3 are repeated.