JP2017082892A - Pipe cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe cover capable of reliably covering a pipe.SOLUTION: A pipe cover 400 includes a cover body 410 having a shape of covering a pipe so as to separate from an outside surface of the pipe, and a fibrous member 430 arranged on an inside surface of the cover body 410 and contacting with the outside surface of the pipe in a state of covering the pipe with the cover body 410. The fibrous member 430 is configured to separate the inside surface of the cover body 410 from the pipe in a state of covering the pipe with the cover body 410.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to a piping cover.

  Piping covers, which are members that cover piping from the outside, are used in various fields. Here, the term “pipe” includes not only a pipe but also a pipe member such as a flange, a joint, and a valve, and a heat insulating cover that covers the pipe.

  For example, Patent Document 1 discloses a substantially spherical cover body having two openings into which a bellows joint is fitted. A space between the outer side surface of the bellows joint and the inner side surface of the cover main body is filled with a fibrous member for damping vibration.

Japanese Patent Laid-Open No. 11-218021

  However, in the case of a pipe cover that is not manufactured integrally with the pipe (bellows joint) as described in Patent Document 1 but is manufactured separately from the pipe, the pipe may not be covered properly. This is because, due to tolerances and variations in the outer shape of the piping, it may occur that the piping cover cannot be fitted into the piping, or that the piping cover can only be attached to the piping in a loose state.

  The objective of this indication is providing the piping cover which can cover piping more reliably.

  The pipe cover according to the present disclosure is arranged on a cover main body having a shape that covers a pipe separately from an outer surface of the pipe, and an inner side surface of the cover main body, and the pipe in a state where the cover main body covers the pipe. And a fibrous member in contact with the outer surface.

  According to the piping cover of this indication, piping can be covered more certainly.

The perspective view which shows an example of the external appearance of the piping cover which concerns on one embodiment of this indication The top view which shows the state which removed a part of piping cover which concerns on this Embodiment Sectional drawing which shows the mode of the cross section of the piping cover which concerns on this Embodiment

  Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the drawings.

<Configuration of piping cover>
FIG. 1 is a perspective view illustrating an example of the appearance of a pipe and a pipe cover of the present disclosure that covers the pipe. FIG. 2 is a plan view showing a state in which a part of the piping cover is removed. FIG. 3 is a cross-sectional view illustrating a state of a cross section passing through a pipe axis of a pipe and a pipe cover of the present disclosure covering the pipe. Hereinafter, description will be given with reference to FIGS.

The piping system 10 includes a pipe 100 and a flange joint 200. The flange joint 200 includes first and second flange portions 210 ₁ and 210 ₂ and is connected to the first and second pipes 100 ₁ and 100 ₂ , respectively.

The first and second flange portions 210 ₁ and 210 ₂ are fixed to each other by being fastened by a plurality of flange bolts and nuts 220. Hereinafter, the first and second flange portions 210 ₁ and 210 ₂ are collectively referred to as “flange portion 210” as appropriate.

  The piping system 10 is, for example, a piping portion between an engine and an exhaust gas aftertreatment device in a vehicle engine exhaust system. In this case, in order to send the exhaust gas to the aftertreatment device while maintaining a high temperature as much as possible, there is a demand for suppressing heat dissipation from the piping system 10 as much as possible. Therefore, the tube 100 is covered with a heat insulating cover 300 including the cover member 310 and the heat insulating material 320. However, it is difficult to adequately cover the piping member such as the flange joint 200 with a heat insulating cover for a pipe that is mass-produced for each standardized pipe size.

  Therefore, the piping system 10 covers the flange joint 200 with a pipe cover 400 formed in accordance with the outer shape of the flange joint 200 with respect to the flange joint 200. Thereby, the piping system 10 aims at suppressing not only the heat radiation from the pipe 100 but also the heat radiation from the flange joint 200.

The pipe cover 400 includes first and second cover bodies 410 ₁ and 410 ₂ having a shape that covers the flange joint 200 from the outside. The first and second cover bodies 410 ₁ , 410 ₂ are connected to each other by fastening the first and second ear portions 411 ₁ , 411 ₂ formed thereon with a plurality of cover bolts and nuts 420, respectively. It is fixed and covers the flange joint 200 over the entire circumference around its axis. The first and second cover bodies 410 ₁ and 410 ₂ are collectively referred to as “cover body 410” as appropriate.

  Although the cover body 410 is not shown, for example, a layer made of a material having high heat insulation and sufficient heat resistance, such as a heat insulating sheet (e.g., silica mat), has a sufficient shape retention property such as stainless steel, impact resistance, It has a cross-sectional structure sandwiched between two layers having corrosion resistance and heat resistance.

  As in the flange joint 200, a pipe having a three-dimensional and complicated shape and configured by combining a large number of parts has a large variation in the outer shape of the pipe. Therefore, the cover main body 410 has a shape in which the inner side surface is slightly larger than the outer side surface of the flange joint 200, that is, a shape that covers the outer side surface of the pipe.

The cover body 410, a second side of the tube 100 ₂ as compared with the first side of the tube 100 ₁ is spread, has a bell-like shape. Then, the cover body 410 extends to the end of the first tube 100 _first flange joint 200 side. Hereinafter, an end portion of the first tube 100 _first side of the cover body 410 is referred to as "neck".

  The cover main body 410 is formed so that the separation distance between the flange joint 200 and the outer surface of the pipe 100 is the smallest at the neck portion and the portion covering the flange portion 210 (hereinafter referred to as “flange proximity portion”). Yes. The distance is, for example, 3 mm when the flange joint 200 has an outer shape as designed.

  And the piping cover 400 has the fibrous member 430 which contacts the outer surface of these piping in the state which the cover main body 410 covered the flange joint 200 and the pipe | tube 100 from the outer side. However, the fibrous member 430 is disposed only on the neck portion and the flange proximity portion on the inner side surface of the cover main body 410. In addition, illustration of the fibrous member 430 is abbreviate | omitted in FIG.

  The fibrous member 430 is, for example, a wire mesh made of a metal material, and is bonded to the cover body 410 by a known bonding technique such as spot welding. In this case, it is desirable that the cover main body 410 is made of only a metal material without including the above-described heat insulating material in a portion where the fibrous member 430 is disposed. In addition, the fibrous member 430 does not necessarily need to be strictly “fibrous”, and may be any member having a predetermined heat insulating property by including an air layer or a void.

  The distance between the outer surface of the flange joint 200 and the pipe 100 and the inner surface of the cover body 410 in the arrangement portion of the fibrous member 430 may vary depending on the flange joint 200 and the pipe 100. The maximum distance and the minimum distance that can be set can be set. The fibrous member 430 has a thickness (for example, 10 mm) greater than the allowable maximum distance in a state before the piping cover 400 is attached to the flange joint 200. Further, the fibrous member 430 can be compressed to the minimum allowable distance (for example, 1 mm) in the pressed state.

  The fibrous member 430 in the neck portion is arranged in a ring shape over the entire circumference (or substantially the entire circumference) around the axis of the tube 100. Further, the fibrous member 430 in the flange proximity portion is disposed at two locations that are symmetrical with respect to the axis of the flange joint 200. The fibrous member 430 in the flange proximity portion has a substantially U-shaped cross section that covers the flange portion 210 from two or three directions according to the shape of the flange portion 210.

Such a fibrous member 430 exhibits a function of fixing the cover body 410 to the flange joint 200. That is, the cover bolts and nuts 420 (fastening portions) that fasten the first and second cover bodies 410 ₁ and 410 ₂ are connected to the flange joint 200 and the pipe 100 via the fibrous member 430. The pressing force is generated.

  The fibrous member 430 receives the pressing force and is compressed in the thickness direction, but the position of the cover body 410 in the radial direction of the flange joint 200 with respect to the flange joint 200 is fixed by a repulsive force at the time of compression. Further, the flange portion 210 has a rectangular shape around the axis. The fibrous member 430 in the flange proximity portion is fitted to each of the two opposing sides of the rectangle and is disposed at a position that is substantially axially symmetric, and is fitted to each of the two sides. It has a shape. Therefore, the two fibrous members 430 in the flange proximity portion prevent the piping cover 400 from moving in the axial direction and the rotational direction of the flange joint 200. The pipe cover 400 is fixed to the pipe by tightening the cover bolt and nut 420 described above.

  In addition, the fibrous member 430 is arrange | positioned only in the neck part and the flange proximity | contact part among the inner surfaces of the cover main body 410. FIG. For this reason, in a state where the cover main body 410 covers the flange joint 200, there is a space between the portion of the inner surface where the fibrous member 430 is not disposed and the outer surface of the flange joint 200 (and the tube 100). 440 will be formed.

<Effects of the present disclosure>
As described above, the pipe cover 400 of the present disclosure is disposed on the inner surface of the cover main body 410 and the cover main body 410 having a shape that covers the pipe separately from the outer surface of the pipe, and the cover main body 410 covers the pipe. And a fibrous member 430 that contacts the outer surface of the pipe in the state.

  With such a configuration, the pipe cover 400 of the present disclosure can fix the cover main body 410 to the pipe while dealing with variations in the outer shape of the pipe, and can more reliably cover the pipe.

  In the piping cover 400 of the present disclosure, the fibrous member 430 separates the inner surface of the cover main body 410 from the piping in a state where the cover main body 410 covers the piping.

  With such a configuration, the piping cover 400 of the present disclosure can prevent direct heat transfer between the piping and the cover main body 410 and realize higher heat insulation.

  In the piping cover 400 of the present disclosure, the fibrous member 430 is disposed on a part of the inner side surface of the cover main body 410.

  With such a configuration, the pipe cover 400 of the present disclosure can suppress heat transfer via the fibrous member 430 between the pipe and the cover main body 410 and can realize higher heat insulation.

<Modified example of the present disclosure>
Note that the pipe to which the pipe cover 400 of the present disclosure is applied and the purpose of covering the pipe are not limited to the above example. For example, the pipe cover 400 of the present disclosure may be applied to a valve of a water pipe whose temperature is lower than that of the outside air.

  Further, the specific configuration of the piping cover 400 is not limited to the above example. For example, the cover body 410 may have other shapes such as a cylindrical shape or a spherical shape, or may be made of other materials such as polystyrene. Further, the fibrous member 430 may be another fibrous member such as rock wool. However, when it employ | adopts about piping used as high temperature like the exhaust system of a vehicle, especially the fibrous member 430 needs to have sufficient heat resistance.

  In addition, as a member which fixes a cover main body with respect to piping, it is also considered to employ | adopt other members which are not fibrous, such as clay and rubber, but have flexibility and flexibility. However, from the viewpoints of heat resistance, corrosion resistance, heat insulation, and the like, it is necessary to use a material suitable for the applied piping.

  Further, the arrangement of the fibrous member 430 is not limited to the above example. For example, the fibrous member 430 in the neck portion and the fibrous member 430 in the flange proximity portion may be connected. In each of the neck portion and the flange proximity portion, a plurality of separated fibrous members 430 may be arranged. However, it is desirable that the fibrous member 430 is disposed so as to contact the flange joint 200 at three or more points such that the center of gravity of the entire contact region is close to the axis of the flange joint 200. Furthermore, it is desirable that the fibrous member 430 is disposed so as to be in contact with the flange joint 200 at two or more places separated in the axial direction of the flange joint 200.

  The piping cover of this indication is useful as a piping cover which can cover piping more certainly.

DESCRIPTION OF SYMBOLS 10 Piping system 100 Pipe 200 Flange joint 210 Flange part 220 Flange bolt and nut 300 Thermal insulation cover 310 Cover member 320 Thermal insulation material 400 Piping cover 410 Cover main body 411 Ear part 420 Cover bolt and nut 430 Fibrous member 440 Space

Claims (8)

A cover body having a shape that covers the pipe separately from the outer surface of the pipe;
A fibrous member disposed on the inner surface of the cover body and in contact with the outer surface of the pipe in a state where the cover body covers the pipe;
Piping cover. The fibrous member is
In the state where the cover body covers the pipe, the inner side surface is separated from the pipe.
The piping cover according to claim 1. The fibrous member is
Arranged on a part of the inner surface,
The piping cover according to claim 1. A fastening portion for generating a pressing force that presses the cover body against the pipe via the fibrous member;
The cover body is
Fixed to the pipe by the pressing force,
The piping cover according to claim 1. The pipe includes a flange joint,
The piping cover according to claim 1. The fibrous member is a wire mesh,
The piping cover according to claim 1. Of the cover body, at least the portion where the fibrous member is disposed, and the fibrous member are each made of metal,
The fibrous member is
Bonded to the cover body by welding,
The piping cover according to claim 1. The cover body is
Consisting of thermal insulation or having a layer of thermal insulation,
The piping cover according to claim 1.

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