JPH0315532Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to packing of flange connections of ducts mainly used for air conditioning, heat insulation, smoke exhaust, etc.

[Conventional technology]

Conventionally, synthetic rubber products such as neoprene (trade name) and asbestos products have been used for this type of flange packing.

[Problem that the invention attempts to solve]

However, synthetic rubber packing has disadvantages such as being susceptible to deterioration and hardening due to heat, resulting in gaps in the joints, premature aging of the sealing properties, and poor durability.Additionally, asbestos packing has the disadvantages of being easily deteriorated and hardened by heat. Heavy asbestos dust is generated, which poses the risk of developing pneumoconiosis, an occupational disease.Duct construction also poses a similar health risk.As asbestos absorbs water during use, repeated water absorption and drying causes it to harden and shrink, becoming crumbling. There were some drawbacks such as:

[Means for solving problems]

In order to solve the above-mentioned problems, this invention consists of providing an adhesive layer on the surface of a felt of a required thickness made of carbon fibers, and covering this adhesive layer with a release paper.

[Effect]

According to this invention, construction is easy because of the adhesive layer, and the polymeric joints are beautifully finished due to the elasticity against pressure peculiar to the flange, and it also has heat resistance, chemical resistance, smoke resistance, oil resistance, It has excellent water resistance and is completely pollution-free and safe to handle.

〔Example〕

FIG. 1 shows an embodiment of this invention. This devised flange packing has fineness x
An adhesive layer 2 is provided on one side of a felt tape 1 made of compressed felt of a required thickness, for example, approximately 5 mm, using carbon fiber with a fiber length of approximately 1 d x 75 mm, and this adhesive layer 2 is a tape-shaped release paper. 3, and is usually used by winding it into a spiral.

The thickness and width of the felt tape 1 made of carbon fiber can be appropriately selected depending on the application. Carbon fibers include carbonized organic fibers such as acrylic fibers, as well as petroleum pitch carbon fibers, which are lighter and more elastic than asbestos or glass fibers, and can be used as packing material when made into felt. is also suitable.

In addition to compressed felt, woven felt is also available for the flange packing of this invention, and thick non-woven fabric is also applicable.

Figures 2 and 3 show this invention applied to a common plate flange for air conditioning, smoke exhaust, etc. ducts. The common plate flange of this duct is easy to join, and a female flange 5 is connected to the end of the rectangular cylindrical duct body 4, and the female flange 5 is connected to the end of the other rectangular cylindrical duct body 4 to be connected. A male flange 7 with a protruding elastic inner flange 6 is provided in series, and the male flange 7 is engaged with the female flange 5 and the two are joined together with a clip 8 to prevent them from coming out. The felt tape 1 is adhesively interposed around the entire periphery using the adhesive layer 2 from which the release paper 3 has been peeled off, thereby forming the packing.

The seam 9 of the felt tape 1 (see Figure 2) is
The overlap dimension should be 25mm or more. The felt tape 1 has great elasticity against pressure,
Even if there is a polymerized seam 9, the thickness will not increase, and since there is an adhesive layer 2, it is extremely easy to apply adhesive to the protruding plane of the male flange 7 or the female flange 5, and it will not shift. Nothing.

Figures 4 and 5 show this invention applied to an ordinary flange of a duct. The normal flange of this duct is attached to the end of the duct body 4.
Separate planar rectangular flanges 10 made of shaped steel are each fixed with screws 11, and a felt tape 1 is adhesively interposed around the entire joint of one flange 10 using an adhesive layer 2 to form a packing. Both are connected by bolts and nuts 12.

In addition, the flange packing of this invention is not limited to the two usage examples mentioned above.
Of course, it can be used for air conditioning, heat insulation, and smoke exhaust ducts of various shapes.

〔effect〕

As mentioned above, the packing for flanges according to this invention is mainly made by providing an adhesive layer on the surface of felt made of heat-resistant carbon fiber, and covering this adhesive layer with release paper to make it easier to handle. It is in the form of a tape and can be easily applied to the joint surface of the flange, making it easy to operate and non-polluting. Due to the excellent elasticity unique to felt, it does not create gaps and hardens further. Heat resistant, chemical resistant, smoke resistant, oil resistant, moisture resistant,
It has excellent water resistance, perfect sealing performance over a long period of time, and can be supplied at low cost.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of this invention, FIGS. 2 and 3 are perspective views and sectional views of essential parts showing the same as the above used for a common plate flange of a duct, and FIG.
Figures 5 and 5 are a perspective view and a sectional view of essential parts, respectively, showing a state in which the same as above is used for a normal flange of a duct. 1...Felt tape, 2...Adhesive layer, 3...
Release paper, 4...Duct body, 5...Female flange, 7...Male flange, 10...Flange.

Claims (1)

[Scope of utility model registration request] A flange packing made by providing an adhesive layer on the surface of a felt of a required thickness made of carbon fiber, and covering this adhesive layer with release paper.