NL1016488C2 - Preparing insulation packages for e.g. dampers in gas turbine inlet and exit channels, by securing a cover material with strand and fasteners to an insulation block - Google Patents

Abstract

A cover material is secured to an insulation block with the aid of a strand secured to fasteners mounted on or in this material. A method for preparing an insulation package (20) comprises forming a block of insulation material and covering it with a layer of cover material, e.g. a heat-resistant fabric. The cover material is secured to the block with the aid of a strand secured to fasteners mounted on or in this material. Independent claims are also included for (a) the insulation package, and (b) a cover material comprising a rectilinear fabric or panel with fasteners (e.g. eyelets) for a strand on at least two opposing sides.

Description

Title: Method for manufacturing an insulation package, an insulation package and a cover material to be used for that insulation package

The present invention relates to a method for manufacturing an insulation package, wherein a block is formed from insulating material and that block is coated on the outside with a layer of covering material, such as a heat-resistant cloth.

The method according to the preamble is known in the prior art.

The insulation package according to the present invention can be used in the first place for coating boiler walls on the inside. The purpose of this coating is two-fold. In the first place, the covering can protect the wall of the venting channel against excessive heat. In addition to the protection against heat, the insulation material also ensures sound absorption. This means that 15 insulation material also serves as a silencer.

The insulation package according to the present invention can also be used for filling dampers and damper tubes which are arranged in inlet and outlet channels, for example of a gas turbine. The damping effect is formed by a number of panels (kulissen) placed next to each other or walls that are built up from a frame of cross-extending ribs. Clamping between these ribs. These boxes are filled with insulation packages. The damper panels are arranged in an inlet and / or outlet channel and must absorb the noise in the channel as much as possible. Because the damper is exposed to the hot exhaust gases, the outer surface of the damper panels must be made of heat-resistant material.

The insulation packages that are currently used for boiler walls and mufflers are usually filled on the inside with an insulation material, such as for example a mineral or ceramic wool. The insulation material is often not resistant to temperature changes, the high temperature and the mechanical load of air or other fluids that must be discharged through the discharge channel. It is therefore common practice to coat the insulation material on the outside with f t. ·· f V; f '.

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2 a heat-resistant and mechanically strong cover material. For this, a cloth made of covering material is usually used, for example from glass or silica.

The blocks of insulating material used according to the state of the art have substantially a block-shaped shape, with a relatively large front surface, a correspondingly large rear surface and four smaller side surfaces. These six surfaces in total must be covered with the heat-resistant material when manufacturing the insulation package. In the state of the art, it is customary to sew six pieces of cloth together and thus form a covering for the block of insulating material. The result is an insulation package that is similar to a pillow.

The method for manufacturing an insulation package according to the state of the art is time-consuming and therefore expensive. After all, for each block of insulating material, at least twelve sewing seams are required to sew the six pieces of covering material together. Moreover, the pieces of covering material must be precisely cut to size in advance. Depending on the thickness of the block of insulating material to be covered, the height of the pieces of covering material will also have to vary. This means that in addition to the sewing process, the cutting process for cutting the pieces of covering material to size will require a lot of time.

In view of the disadvantages of the method according to the prior art, the object of the present invention is to provide a method of the type mentioned in the preamble, wherein the disadvantages according to the prior art are substantially avoided.

That object is achieved in the present invention in that the covering material is fixed around the block of insulating material with the aid of a basting element which cooperates with fixing elements which are arranged on or in the layer of covering material.

According to the invention, a standard covering material, such as a heat-resistant cloth, with standard dimensions is made and this cloth is provided on at least two sides with fastening elements, such as eyes, which can cooperate with a basting device. It is noted that these "fastening elements" can also be formed by openings or recesses that are present or arranged in the cover material.

A basting element may, for example, consist of a metal wire. As will be explained below, it is advantageous to give the basting element a certain spring action or even to design it entirely as a spring. With the help of these springs, the covering material is kept under pre-stress on the insulation material. When manufacturing an insulation package, the cover material is folded around the block of insulation material. Subsequently, the heat-resistant material can be pulled around the block with a single rowing action and fixed on the block.

The starting material, the cloth made of heat-resistant material, can be produced by machine and quickly. Fastening the heat-resistant material around the insulation material can be done manually and quickly. This means that savings can be made on the production time of an insulation package, and thus on the total costs of the insulation of an exhaust duct, panel or wall.

Because use is made of a basting element, wherein the total length of the basting element is flexible, it is possible to cover blocks of 20 different thicknesses with a standard size of covering material. A seam will form between the ends of the heat-resistant material. When placing the blocks, however, these "seams" will be covered by the material of the blocks placed next to them. This means that the heat or air to be discharged cannot make direct contact with the bare surface of the blocks. It is possible, during the fabrication of the blocks, before the layers of covering material are applied to the insulating material, to first coat the insulating material with a protective layer. This protective layer is applied at the place where a seam will be formed. The protective layer can protect the vulnerable insulation material so that it cannot be damaged during storage and transport. Moreover, the protective layer can protect the user because he cannot come into direct contact with the insulating material, which sometimes has an irritating effect on the skin. Finally, the protective layer can also be used for applying, for example, a brand name or a recognition mark to the insulation package. This includes the use of colors to represent different quality grades of the insulation packages.

According to the invention, it is possible for a block of insulating material, a first layer and a second layer of covering material to be arranged which is respectively attached to each other and fixed to the block of insulating material with the aid of at least one basting element.

When a block of insulating material is coated with a first and a second layer of covering material, it is possible to use two different types of heat-resistant material. The higher the temperature at which a material is resistant, the higher the price of the product per square meter. For many applications, it is sufficient if the side facing the drain is provided with a heat-resistant material that is suitable for relatively high temperatures. Examples are materials that can withstand temperatures up to, for example, 750 ° C - 1000 ° C. Such materials currently cost around NLG 110.m. The side of the insulation block that is directed away from the hot air during use will be subjected to less thermal stress and can be of cheap design. Materials that have a heat resistance of, for example, 145 ° C are currently for sale at a price of approximately NLG 10 / m2. Due to the presence of a first and second layer, it can be achieved that only the side that is directly loaded by the hot air or hot gases is covered with the relatively expensive layer of covering material in this way, the cost price of the insulation package can further be kept low.

According to the invention, it is furthermore possible to connect a first side of the first layer of covering material to a first side of the second layer of covering material with the aid of a first stringing element, wherein a second side of the first layer of covering material is connected to a second side of the second layer of covering material with the aid of a second string member or a further part of the first string member. According to this method, the first and the second layer of covering material are connected to each other with the aid of, for example, a first and second stringing member. The gaps that arise between the ends of the different cover layers can be positioned such that, in use, they are not directed to the side in which heat and mechanical stress are received.

Alternatively, it is possible to connect a first side of the first layer of covering material with the aid of fastening elements such as hooks to a first side of the second layer of covering material, and then to connect the second side of the first layer of covering material with the aid of a basting element with the second side of the second layer of covering material. According to this method, a first side of a first layer of cover material is clicked onto a first side of a second layer of cover material. The opposite side of both layers is then connected with the aid of a basting element.

The invention furthermore relates to an insulation package which comprises an insulating material which is provided on the outside with a covering of covering material. The insulation package according to the invention is characterized in that the covering of covering material is provided with fastening elements which cooperate with a basting element for fixing the layer of covering material around the block of insulating material.

According to the invention, it is possible for the basting element to be in the form of a spring, for keeping the layer of covering material under bias. It is thereby possible for the basting element to form an eye for the passage of an element for attaching the insulation package to a substrate.

Securing the cover material to the insulating material is further facilitated by designing the basting element as springs. Such springs can for instance be provided at both ends with a hook element for engaging an eye which is present in the covering material. Moreover, it is possible to design the springs so that they comprise an eye. This eye can be used for securing the blocks on a surface. For example, 30 bars or stakes can be inserted through the eyes, which are fixed on the ground on the one hand and which intervene on the other hand through the eyes of the springs. These fixing members are, for example, arranged in a hook-shaped manner so that the members hold the blocks and press them onto a surface.

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According to the invention it is advantageous for the covering to comprise a first layer of covering material and to comprise a second layer of covering material, wherein a first and an opposite second side of the first layer of covering material are connected via basting members 5 to a first and an opposite second side of the second layer of covering material.

As already indicated above, it is advantageous to attach the layer of covering material to the insulating material to be enclosed by means of a stringing operation. Due to the presence of a first and a second layer, the quality of the different covering materials can be varied.

Furthermore, the present invention provides a covering material, such as a heat-resistant material, which comprises a cloth or a plate. The covering material, such as heat-resistant material, according to the invention is characterized in that the cloth or the plate of covering material is substantially in the form of a quadrangle, wherein at least two opposite sides thereof are provided with fastening elements, such as eyes, for the passage of a basting element .

As stated, the production of insulation packages according to the present invention can be worked with standard dimensions for the covering material. The presence of these standard dimensions means that further savings can be made on the manufacturing costs of the insulation packages.

According to the invention, it is furthermore possible that the cloth or the plate of cover material is provided with an extension which connects to one of the rows of fastening elements on the cover material. When an insulation wall is built up from an insulation package according to the present invention, it is possible that a strip of covering material is protruded at one end of the insulation package. In use, this strip 30 will protrude over the adjacent insulation package. In this way a further improvement of the insulating effect of adjacent insulation packages is achieved.

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The dimensions that can be used for insulation packages according to the present invention are preferably determined by the manageability of the packages by a user. That is, the packages are preferably no heavier than 25 kg. Furthermore, maximum dimensions of, for example, 190 x 90 cm apply.

The present invention will be further elucidated in the accompanying figures in which:

Figure 1 schematically shows the construction of an outlet channel, wherein insulation packages are arranged against the wall.

Figure 2 shows the manufacture of an insulation package according to the present invention.

Figure 3 shows an insulation package made according to the method shown in Figure 2.

Figure 4 shows schematically the construction of a damper, with walls placed substantially parallel.

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Figure 5 shows an insulation package according to the present invention, wherein use is made of basting elements that are designed as springs.

Figure 1 schematically shows a discharge channel 1. The discharge channel 1 can for instance be used as an outlet of a space in which a gas turbine is placed. It is clear that the walls of such an outlet channel are exposed to both a high temperature and the mechanical load of the gases to be discharged. To protect the walls of the outlet channel 1 against these gases, the walls are covered with the aid of a plurality of insulation packages 20 according to the invention.

The specific construction of these insulation packages 20 is particularly apparent from Figures 2 and 3.

The insulation packages 20 comprise a heat-resistant exterior and are filled with an insulation material, such as, for example, mineral wool. The insulation packages 20 serve δ as protection against the heat which must be removed via the discharge channel 1. Moreover, the insulation packages 20 can absorb sound, which means that the insulation material can serve as a sound damper.

The walls 2, 3 of the outlet channel 1 are provided with fastening elements 4. According to figure 1, the fastening elements 4 are substantially square-shaped. The insulation packages 20 can be slid over the fastening elements 4, so that they are held against the wall 2, 3 by the fastening elements 4. When the walls 2, 3 are filled, the packages are placed row by row on the elements 4. It is possible to design the fastening elements 4 in such a way that a pivoting movement is possible between the part of the fastening element 4 placed substantially transversely to the wall 2, 3 and the part running substantially perpendicularly along the wall 2, 3 '. By providing a pivot point between these parts, it is possible to puncture the packages 20 on the fastening elements 4 and then pivot against the wall 2, 3.

Figure 2 shows an insulation package 20 according to the present invention. The insulation package 20 comprises a first heat-resistant material 21, such as, for example, a cloth made of heat-resistant plastic and a second heat-resistant material such as a heat-resistant cloth 22. Both the first and the second heat-resistant material 21, 22 are provided with fastening members such as eyes 23. Between the first and second heat-resistant material 21, 22, a block of insulating material 24 is placed. The insulating material can for instance comprise a mineral wool, such as for example glass wool or rock wool.

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The first heat-resistant material and the second heat-resistant material 21, 22 are fastened around the insulating core 24 by means of a basting device 25. This batting device 25 can be threaded between the respective eyes 23 on the parts 21 and 22. Because the parts 21 and 22 provided with the fixing eyes 23, the fixing of the parts 21 and 22 around the core 24 can take place relatively quickly. This means that savings can be made on production time, and therefore on production costs.

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Because the length of the basting element 25 is flexible, a core 24 with a varying thickness can be coated with the aid of first and second parts 21, 22. When the core 24 is made thicker, the distance between the eyes 23 of the first and the second part 21, 22 respectively will be greater. When the thickness of the core 24 is chosen to be smaller, the eyes 23 of the respective parts 21, 22 will be closer to each other.

In use, only one side, for example the first material 21, will make direct contact with the air to be discharged. That is, it is precisely this side 10 that must be made of a high-quality, heat-resistant material. On the other side of the core 24, the thermal load of the material, in this case the second material 22, will be much lower. That is, the second material 22 needs to be less heat-resistant than the first material 21. Because a distinction can be made in a simple manner between the relatively heavily loaded front side of an insulation package and the less heavily loaded rear side of a package, be saved on the production costs of the insulation package 20.

It can be seen from Figure 2 that the first material 21 is provided with an extension or flap 26. This flap 26 can be used to ensure an effective sealing of a wall lined with insulation packages. The flap 26 will rest on the outside of an adjacent insulation package 20. This can be seen, inter alia, in figure 1. The presence of the flaps results in a closed front.

Figure 3 again shows the insulation package 20 according to the present invention. The two parts 21 and 22 are fixedly fastened to the core 24 by means of the basting element 25.

For the insulation package according to the present invention, for example, as fixing members 23, metal eyelets can be used which are arranged in the first and second material 21, 22, respectively. As a stringing member, use can be made, for example, of a steel wire, for example made of stainless steel.

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Figure 4 shows diagrammatically the structure of a damper 30. This damper 30 comprises a plurality of walls 31, which are placed substantially parallel to each other. . These cavities 34 can be filled with the packages 20 according to the present invention. Due to the coating on the outer walls, the insulation material 24 of the packages 20 cannot be directly exposed to the heat or the mechanical action of the gases passing through the damper.

Figure 5 shows an alternative embodiment of the insulation package according to the present invention. Figure 5 shows an insulation package 40 which has a similar structure to the insulation package 20 according to Figures 2 and 3. The insulation package 40 comprises a core 44 which is covered on both sides with a covering material, such as heat-resistant material 41, 42. The covering material 41, 42 is provided with eyes 43 which cooperate with a basting member 45. According to Figure 5, the birding member 45 is designed as a spring. As a result of the spring action, the basting element 45 will keep the material 41, 42 under a certain pretension against the core 44. Moreover, the basting element 45 according to Figure 5 is designed such that the basting element 45 forms an eye. This eye can be engaged by a fastening element, for example the fastening element 4 shown in figure 1. When the fastening element engages one or more eyes that are present in one or more basting members 45, good fastening is not only obtained from the insulation package 40 on a substrate, moreover it is ensured that the cover material 21, 22 cannot move relative to the core 44.

Both in figure 2 and in figure 5 it can be seen that between the layer of cover material 21, 22 and 41, 42, respectively, an uncovered part is free of the insulation material 24, 44, respectively. This "seam" between the different layers of insulation material (21 , 22; 41, 42) can be covered by first wrapping the insulating material 24, 44 with the aid of a protective layer prior to fixing the cover material. This protective layer can protect the relatively vulnerable insulating material 24, 44 during storage and transport. Moreover, this cover material protects the user, who cannot be directly exposed to the insulation material 24,44, which often has an irritating effect on the skin.

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In addition, the cover material can also be used to indicate a mark or, for example, a quality indication of the insulation package 20, 40 respectively.

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Claims (10)

A method for manufacturing an insulation package, wherein a block is formed from insulating material and that block is coated on the outside with a layer of covering material, such as a heat-resistant cloth, characterized in that the covering material is fixed around the block of insulating material with by means of a basting element which cooperates with fixing elements which are arranged on or in the layer of covering material. A method according to claim 1, characterized in that a first and a second layer of covering material is arranged around the block of insulating material, which layer is respectively attached to each other and fixed to the block of insulating material with the aid of at least one basting element. 3. Method as claimed in claim 2, wherein a first side of the first layer of covering material is connected to a first side of the second layer of covering material by means of a first stringing element, wherein a second side of the first layer of covering material is connected to a second side of the second layer of covering material with the aid of a second string member or a further part of the first string member. 20 4. Method as claimed in claim 2, characterized in that a first side of the first layer of covering material is connected to a first side of the second layer of covering material with the aid of fastening elements such as hooks, and then the second side of the first layer of covering material connects to the second side of the second layer of covering material. 5. Insulation package, comprising a block of insulating material, provided on the outside with a covering made of covering material, characterized in that the layer of covering material is provided with fastening elements which cooperate with a basting element for fixing the layer of covering material around the block of insulating material. Insulation package according to claim 5, characterized in that the basting element is designed as a spring for keeping the layer of covering material under bias. 10 1 6 'S Tj ¥ Insulation package according to claim 5 or 6, characterized in that the basting element forms an eye for the passage of an element for attaching the insulation package to a substrate. 5 Insulation package according to claim 6 or 7, characterized in that the covering comprises a first layer of covering material and a second layer of covering material, wherein a first and an opposite second side of the first layer of covering material are connected via basting elements to a first and an opposite second side of the second layer of covering material. 9. Cover material comprising a cloth or a plate, characterized in that the cloth or the plate of cover material is substantially in the form of a quadrangle, wherein at least two opposite sides thereof are provided with fastening elements, such as eyes, for passage of a string. Cover material as claimed in claim 9, characterized in that the cloth or the plate of cover material is provided with an extension which connects to one of the rows of fastening elements on the cover material. 20