JPH1054498A - Pipe connecting part heat insulating material unit and its executing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate heat insulating material covering work without forming a clearance, by forming a heat insulating unit from a bolt and a nut which fixes connecting flanges, a flange cover packing having a hole part in which the head parts of the bolt and the nut can be inserted, and a split cylindrical heat insulating body with which the flange cover packing and the connecting flanges are covered. SOLUTION: In a piping connecting part 1, the flanges 3 of piping 2 are mutually fixed by bolts/nuts 4, and two half ring shapes of a flange cover packing 5 are inserted by coinciding with holes 5a parts of bolts 4a and head parts of nut 4b which are projected from a flange 3. At this time, the inner circumference of the flange cover packing 5 adheres to a piping outer member 6a mounted in the periphery of a piping 2. Next, the divided half fitting groove 7a of a cylindrical. heat insulating body 7 is fitted to two flanges 3 and the flange cover packing 5 so as to cover. At this time, the groove surface of the connecting groove 7b of the piping heat insulating body 7 is closely stuck to the piping outer member 6a. Therefore, the heat insulating body 7 can be closely arranged, thus heat insulating body attaching work can be easily executed without forming a clearance which is easily to be in dew condensation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating material at a joint of a cooling pipe and a heat insulating pipe, and more particularly to a heat insulating material of a joint of a cooling pipe and a method of installing the same.

[0002]

2. Description of the Related Art Pipes, such as cooling pipes for air conditioning, pipes for heat retention, and pipes for water supply and drainage, are covered with a tubular heat insulating unit (a heat insulating body and an exterior material) in a straight pipe, and heat loss from the pipe is obtained. It is conventionally known to prevent the occurrence of water and to prevent dew condensation on pipes and surfaces.

Usually, a cylindrical heat insulator is used as a heat insulator of a heat insulating unit of a pipe, and a cylindrical heat insulator is directly attached to a straight pipe portion of the pipe, and further covered with an exterior material on its outside. doing. This cylindrical heat insulator,
Exterior materials, heat insulators, and methods of applying the exterior materials are known.

[0004] At the joints of the pipes such as the cold insulation pipe, the heat insulation pipe and the water supply pipe, the flanges of the joints (joint portions) of the pipes are brought into contact with each other and fastened with bolts and nuts. Conventionally, as a heat insulating material, the outside is covered with a felt material or a blanket material, a joint sealer for moisture prevention is applied to seams between the cold insulating materials to prevent air from entering, and an exterior material is wrapped around the outer surface side. Was. The joint sealer has been made of a material based on oil or fat, or a material based on resin or rubber.

[0005]

In the conventional pipe joint, a gap is easily formed around the flange due to the unevenness of the flange and the bolt and nut for fixing the same. In the case of a felt material or a blanket material, the circumference of the pipe is closely adhered. There was a problem that voids were easily formed due to inability to cover.

[0006] In particular, in the case of a cold-holding pipe, if there is a gap around the pipe, moisture in the air entering through the gap will condense and cause the pipe to freeze and cause an accident. Therefore, it is desired to reduce the gap around the pipe as much as possible. Was rare.

[0007] Further, there is a problem that it is difficult and time-consuming to coat the felt material or the blanket material so as to make them close together without forming a gap as much as possible in the piping.

[0008]

In order to solve these problems, it is possible to insert a bolt nut for fixing between joint flanges and a head of a bolt nut protruding from the flange in a heat insulating unit covering a pipe joint. The present invention proposes a heat insulating material unit comprising: a flange cover packing having a large hole; and a divided cylindrical heat insulator having a groove covering the joining flange and the flange cover packing.

Further, in the heat insulating material unit for covering the joint of the pipe, the semi-circular body has a bolt nut for fixing the joint flange and a hole for inserting a head of the bolt nut protruding from the flange. A heat insulating material unit comprising a flange cover packing and a cylindrical heat insulator made up of two semi-cylindrical bodies having a groove covering the joining flange and the flange cover packing is proposed.

Further, in the method of installing a heat insulating material unit for covering a pipe joint, the joint flanges are fixed with bolts and nuts, and the heads of the bolts and nuts protruding from the flanges are inserted into holes of the flange cover packing. Fix, then connect the joint flange and flange cover packing
The present invention proposes a method of constructing a heat insulating unit characterized in that it is closely fitted to and covered with a groove of a cylindrical heat insulator that can be divided into two.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings showing an embodiment. 1 is a cross-sectional explanatory view of a pipe joint, FIGS. 2 to 5 are explanatory views of a method of installing a heat insulating unit at the pipe joint, and FIG. 2 is a side view of a state in which a bolt and nut are attached to a flange of the pipe joint. Explanatory drawing, FIG. 3 is a side view showing a state in which a pipe cover is covered with a flange cover packing, FIG. 4 is a partial cross-sectional view showing a state in which a cylindrical heat insulator is attached to the pipe connection, and FIG. FIG. 6 is a perspective view of a half portion of the cylindrical heat insulator, and FIG. 7 is a perspective view of the flange cover packing.

Reference numeral 1 denotes a pipe joint. The pipe 2 is joined by flanges 3 at the pipe end.

The outer diameter of the flange 3 of the pipe joint 1 is generally twice or more the outer diameter of the pipe 2.

The pipe joint 1 is joined by inserting bolts 4a into a plurality of bolt holes of the flange 3 with which the pipes 1 are in contact, and fastening both sides of the bolt 4a with nuts 4b.

The bolts 4a and the nuts 4b projecting from the flange 3 are put into holes 5a of the flange cover packing 5 and covered. Flange cover packing 5 is 2
The two half-ring shaped plate-like bodies are combined to form one ring shape.

The flange cover packing 5 has a ring-shaped outer diameter corresponding to the outer diameter of the flange 3 and an inner diameter corresponding to the outer diameter of the pipe 2. The thickness of the flange cover packing 5 is about 15 mm to 20 mm, but it is sufficient that the thickness is such that the bolt 4a does not protrude from the hole 5a.

The flange cover packing 5 is made of a material such as cross-linked polyethylene foam, and after fixing the flange 3 with bolts and nuts, the flange cover packing 5 covers the pipe heat insulator 6 of the pipe 2 and the pipe exterior material 6a from both sides in half.

Reference numeral 7 denotes a cylindrical heat insulator which is a joint heat insulator. The cylindrical heat insulator 7 which is divided into two parts has an inner fitting groove 7.
The flange cover packing 5 and the flange 3 are fitted to a. The cylindrical heat insulator 7 is formed by vertically dividing the cylindrical body into two along the center of the cylinder, and each semi-cylindrical body has a pipe heat insulator joint groove 7b which is a concave portion extending in the vertical direction.
A fitting groove 7a, which is a further concave part in the circumferential direction, is provided at the center of the pipe heat insulating body joining groove 7b.

The width of the fitting groove 7a is substantially the same as the combined thickness of the flange cover packing 5 and the flange 3, and the depth is the outer diameter of the flange cover packing 5 and the flange 3 and the diameter of the pipe heat insulator 6 of the pipe 2. This is the difference from the outer diameter.

The cylindrical heat insulator 7 may be made of a material having heat insulating properties when cured by heating and pressing. In this embodiment, it is made of glass wool fiber. In another embodiment, a material obtained by adding a phenol resin which is a thermosetting resin to an inorganic fiber such as a cotton-like ceramic fiber is used.
The cylindrical heat insulator 7 is coated with an aluminum foil as an exterior material 8 on the outer periphery on the surface side at the time of manufacturing.

Next, a method of installing the heat insulating unit of the present invention will be described.

The pair of cylindrical heat insulators 7 forming the pipe joint heat insulating unit correspond to the outer diameter of the pipe 2 of the pipe joint 1 to be coated, the two joint surfaces 11 are matched, and the outer periphery is covered with the outer material. Wrap with 8 and paste. The exterior material 8 is cut in accordance with the outer peripheral joint surface of the cylindrical heat insulator 7. As a result, the pair of cylindrical heat insulators 7 are connected to be freely bent by the exterior material 8 and can be opened and closed.

The flange cover packing 5 forming the pipe joint heat insulating unit is composed of two semi-circular plate-like bodies 2 each having a plurality of holes 5 a corresponding to the size of the pipe flange 3.
Consists of one.

The pipe joint 1 fixes the flanges 3 of the pipe 2 with bolts and nuts 4. Next, the holes 5a of the two half-rings of the flange cover packing 5 are fitted to the heads of the bolts 4a and the nuts 4b projecting from the flanges 3, respectively. At this time, the inner periphery of the flange cover packing 5 comes into close contact with the piping exterior material 6a attached to the outer periphery of the piping 2.

The flange cover packing 5 is attached from both sides of the flange 3 of the two pipes 2 by this operation.

Next, the fitting grooves 7a of the divided half cylindrical heat insulators 7 are fitted and covered with the two flanges 3, 3 and the flange cover packings 5, 5, respectively. At this time, the groove surface of the pipe heat insulator joint groove 7b of the cylindrical heat insulator 7 is
It comes into close contact with the piping exterior material 6a. Furthermore, a joint sealer for moisture prevention is applied to joints between the cold insulating materials to prevent intrusion of air.

[0027]

According to the pipe joint heat insulator of the present invention,
Since it is difficult to form a gap between the pipe surface including the pipe joint and the inner surface of the heat insulating body, dew condensation is hard to occur over the entire pipe. In particular, since no voids are formed at the junction of the cold-holding pipes, the cold-holding effect is hardly impaired.

Further, the work of attaching the joint heat insulator at the joint of the pipes can be performed very easily because they are closely connected without forming a gap where dew condensation easily occurs.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view of a pipe joint.

FIG. 2 is an explanatory side view of a state in which a bolt and nut are mounted on a flange of a pipe joint.

FIG. 3 is an explanatory side view showing a state in which a pipe joint is covered with a flange cover packing.

FIG. 4 is a partial cross-sectional explanatory view of a state where a cylindrical heat insulator is attached to a pipe joint.

FIG. 5 is an explanatory side view of the same.

FIG. 6 is a perspective view of a half portion of a cylindrical heat insulator.

FIG. 7 is a perspective view of a flange cover packing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe joint part 2 Pipe (for cold insulation) 3 Flange 4 Bolt nut 4a Bolt 4b Nut 5 Flange cover packing 5a Hole 6 Pipe heat insulator 6a Pipe exterior material 7 Cylindrical heat insulator 7a Fitting groove 7b Pipe heat insulator joint groove 8 Cylindrical heat insulation Body cladding

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[Procedure amendment]

[Submission date] October 17, 1997

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 6

[Correction method] Change

[Correction contents]

FIG. 6

Claims (3)

[Claims] 1. A heat insulating unit for covering a pipe joint, a flange nut for fixing between joint flanges, a flange cover packing having a hole through which a head of the bolt nut protruding from the flange can be inserted, and a joint flange. And a pipe joint heat insulating unit comprising: a split cylindrical heat insulator having a groove covering the flange cover packing. 2. A heat insulating material unit for covering a pipe joint, comprising: a bolt nut for fixing between joint flanges; and two semicircular bodies having holes for inserting a head of the bolt nut protruding from the flange. A pipe joint heat insulating unit comprising: a flange cover packing; and a split cylindrical heat insulator formed of two semi-cylindrical bodies having a groove covering the joining flange and the flange cover packing. 3. A method of installing a heat insulating material unit for covering a pipe joint, wherein the joint flanges are fixed with bolts and nuts, and a head of the bolt and nut projecting from the flange is inserted into a hole of the flange cover packing. A method for constructing a pipe joint insulation unit, comprising: fixing and then fitting and covering a joint flange and a flange cover packing in a groove of a cylindrical heat insulator which can be divided into two parts.