JP2501344Y2 - Heat transfer tube support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a support device for a heat transfer tube such as a boiler or a heat exchanger.

[Prior Art] As shown in FIG. 2, when a heat transfer tube 2 arranged in a horizontal direction in a boiler or the like is supported by a heat transfer tube 1 arranged in a vertical direction, conventionally, FIG. 3 and FIG. The supporting device shown in FIG.

In the structure shown in FIG. 3, the support device 03 is welded to the heat transfer tube 2 arranged horizontally and the heat transfer tube 1 arranged vertically, and the heat transfer tube 2 is supported by the heat transfer tube 1. .

In the structure shown in FIG. 4, the supporting device shown in FIG. 3 is divided into supporting devices 03a and 03b, and the supporting device 03a is welded to the heat transfer tube 1 arranged in the vertical direction to form the supporting device 03b. Is welded to the heat transfer tube 2 arranged in the horizontal direction, and both supporting devices 03a,
The uneven portion of 03b is fitted to support the heat transfer tube 2 so as to be able to slide in the horizontal direction with respect to the heat transfer tube 1.
Stoppers 05 are fixed to the heat transfer tube 2 on both sides of b so as to restrain the horizontal movement of the heat transfer tube 2.

[Problems to be solved by the device]

In the conventional heat transfer tube support device shown in FIG. 3, the heat transfer tubes 1 and 2 are integrated by welding via the support device 03. Since the heat transfer tubes 1 and 2 usually have different internal fluid temperatures, different materials are used, and therefore the coefficients of thermal expansion are different. The supporting device 03 is made of the heat transfer tube 1 or 2 as an equivalent material, or the heat transfer tube 1 or 2 depending on usage conditions.
Different materials are used for each of the two, so
Thermal stress may act on the welded portions of the support device 03 and the heat transfer tubes 1 and 2 to cause cracks. Further, in this support device, since the heat transfer tubes 1 and 2 are completely restrained, a crack may occur in the welded portion due to vibration of the heat transfer tubes 2 due to the gas flow. In any of the above cases, there is a problem that the operation of the boiler or the like is hindered.

Further, the one shown in FIG. 4 is to supplement the problems of the one shown in FIG. 3 and the supporting device shown in FIG.
However, in order to prevent the movement of the heat transfer tube 2 in the horizontal (front-back) direction, it is necessary to attach the stopper 05, which greatly increases the number of manufacturing steps.

The present invention is intended to solve the above problems of the conventional heat transfer tube supporting device.

[Means for solving the problem]

The present invention relates to a heat transfer tube supporting device in which a heat transfer tube arranged in a horizontal direction is supported by a heat transfer tube arranged in a vertical direction, and two pieces are fixed to upper and lower portions of the heat transfer tube arranged in a horizontal direction. First supporting member and one second supporting member fixed to the heat transfer tube arranged in the vertical direction, and each of the first supporting member and the second supporting members are horizontal. It is fitted with an uneven portion that restricts the sliding in the vertical direction and the sliding in the vertical direction.

[Action]

In the present invention, the load of the heat transfer tubes arranged in the horizontal direction is applied to the heat transfer tubes arranged in the vertical direction by the uneven portion that restrains sliding of the fitted first and second support members in the vertical direction. Reportedly.

Further, the horizontal movement of the heat transfer tubes arranged in the horizontal direction is prevented by the concavo-convex portion that restrains sliding in the horizontal direction, and the first and second support members are arranged in the horizontal direction and the vertical direction, respectively. By fixing the heat transfer tubes to the fixed heat transfer tubes and fitting them together, they are not in a completely restrained state, so that the vibrations of the heat transfer tubes arranged in the horizontal direction cause the vibrations of the support members and the heat transfer tubes to be fixed. Stress concentration can be suppressed.

Furthermore, by forming the first and second support members with a material that is equivalent to the heat transfer tube to which they are fixed, the generation of thermal stress between the support member and the heat transfer tube can be suppressed.

〔Example〕

 One embodiment of the present invention will be described with reference to FIG.

This embodiment relates to a support device for heat transfer tubes such as a boiler shown in FIG. 2 as well as a support device for heat transfer tubes shown in FIGS. 3 and 4.

Reference numeral 3 is a support metal member fixed to the heat transfer tube 1 arranged in the vertical direction, and is provided with a concave circular arc-shaped cylindrical surface 3d corresponding to the outer periphery of the heat transfer tube 1 on its one side, and The side is provided with a concave arcuate cylindrical surface 3a corresponding to the outer circumference of the heat transfer tube 2 extending in the horizontal direction and arranged in the horizontal direction. Also,
On the upper and lower surfaces of the supporting metal piece 3, there are provided convex portions 3b projecting upward and downward respectively and extending in the horizontal direction, and a groove 3c is formed in the center thereof.

Reference numeral 4 denotes a supporting metal piece fixed to the heat transfer tube 2 arranged in the horizontal direction, and is a concave portion 4a fitted to the convex portion 3b of the supporting metal article 3 and a convex portion of the supporting metal article 3 at the center of the concave portion 4a. Groove 3c
And a slope 4c welded to the heat transfer tube 2 is provided on the side.

The supporting metal 3 is made of a material equivalent to the heat transfer tube 1, and the supporting metal 4 is made of a material equivalent to the heat transfer tube 2.

In this embodiment, as shown in FIGS. 1 (a) and 1 (b),
On both sides of the heat transfer tube 1 arranged in the vertical direction, the cylindrical surfaces 3d are brought into contact with the outer circumference of the heat transfer tube 1 and the two supporting metal members 3 are opposed to each other and welded, and arranged in the axial direction of the heat transfer tube 1. To do. At this time, the cylindrical surface 3a of the supporting metal is in contact with the outer circumference of the heat transfer tube 2 arranged in the horizontal direction. On the other hand, the inclined surfaces 4c of the two supporting metal pieces 4 are welded in the axial direction of the upper and lower outer peripheries of the heat transfer tube 2 arranged in the horizontal direction, and the concave portions 4a thereof are fitted into the convex portions 3b of the supporting metal piece 3, The protrusion 4b is fitted into the groove 3c of the support metal 3.

In this way, the supporting metal piece 1 on one side of the heat transfer tube 1 and the two supporting metal pieces 4, 4 of the heat transfer tube 2 on the one side and the supporting metal piece on the other side of the heat transfer tube 1 which are also fitted to each other The heat transfer tube 2 on both sides is supported by the heat transfer tube 1 by the two support metal members 4, 4 of the heat transfer tube 3 on the other side and the heat transfer tube 2 on the other side.

In this embodiment, as described above, the vertical movement of the heat transfer tubes 2 arranged in the horizontal direction is restricted by the upper and lower convex portions 3b of the supporting metal piece 3 and the concave portions 4a of the upper and lower supporting metal pieces 4. And is supported by the heat transfer tube 1 arranged in the vertical direction.

On the other hand, the groove 3c of the support metal 3 and the protrusion 4b of the support metal 4 restrain the horizontal movement of the heat transfer tube 2 with respect to the heat transfer tube 1.

Further, the supporting metal 3 and the supporting metal 4 are fitted and connected to each other,
Since it is not completely restrained, even if the heat transfer tube 2 vibrates due to a gas flow or the like, stress concentration does not occur in the welded portions between the supporting metal parts 3 and 4 and the heat transfer tubes 1 and 2.

Furthermore, since the supporting metal 3 is made of a material equivalent to the heat transfer tube 1 and the supporting metal 4 is made of a material equivalent to the heat transfer tube 2,
No thermal stress is generated between each support metal and each heat transfer tube.

[Effect of device]

 The present invention can bring the following effects.

(1) Each of the two first support members fixed to the heat transfer tubes arranged in the horizontal direction and the one second support member fixed to the heat transfer tubes arranged in the vertical direction are arranged in the horizontal direction. Since the heat transfer tubes arranged in the horizontal direction are securely supported by the heat transfer tubes arranged in the vertical direction because they are fitted with the uneven parts that restrain the movement in the horizontal direction, the former moves in the horizontal direction with respect to the latter. Can be restrained.

(2) Since the first and second support members fixed to both heat transfer tubes are fitted to each other, the first and second support members are attached.
The support member is not completely restrained, and stress concentration between the support member and the heat transfer pipe is prevented from occurring due to vibration of the heat transfer pipe arranged in the horizontal direction due to gas flow or the like.

(3) Unlike the conventional heat transfer tube supporting device, it is not necessary to provide a stopper in addition to the supporting member, and the number of steps for construction can be reduced.

(4) When each of the first and second support members is made of a material equivalent to the heat transfer tube to which it is fixed, it is possible to prevent the occurrence of thermal stress in the fixing portion between the support member and the heat transfer tube. .

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 (a) is a plan view thereof, FIG. 1 (b) is an elevation view thereof, and FIG. 1 (c) is an explanatory view of a supporting metal member thereof. FIG. 2 is an explanatory view of a conventional heat transfer tube of a boiler or the like, FIGS. 3 and 4 show an example of a conventional heat transfer tube supporting device in a portion A of FIG. 2, and FIGS.
Figure (b) is a plan view and an elevation view of the example, respectively.
Drawing (a) and Drawing 4 (b) are the top views and elevation views of other examples, respectively. 1 ... Vertically arranged heat transfer tube, 2 ... Horizontally arranged heat transfer tube, 3 ... Support metal object, 3b ... Support metal projection, 3c ... Support metal groove, 4 ... Support hardware, 4a ... Recessed support metal recess, 4b ... Support metal projection.

Claims (1)

(57) [Scope of utility model registration request] 1. A support device for a heat transfer tube in which a heat transfer tube arranged in a horizontal direction is supported by a heat transfer tube arranged in a vertical direction. A plurality of first supporting members and one second supporting member fixed to the heat transfer tubes arranged in the vertical direction, each of the first supporting members and the second supporting member being horizontal. A support device for a heat transfer tube, wherein the heat transfer tube support device is fitted with concave and convex portions that respectively restrain the sliding in the vertical direction and the sliding in the vertical direction.