JPH0635781U - Header fittings - Google Patents

Abstract

(57) [Summary] [Object] The present invention is to provide a compact header-joint in which the pitch interval between the branch pipes provided in the header can be reduced. A header having a main pipe and a plurality of branch pipes projecting in the direction perpendicular to the axis on the outer periphery of the main pipe, and having a wrench-hanging corner portion on the outer circumference of the branch pipe, a pair of the corner portions facing each other. The header-joint is characterized in that corners are provided in the axial direction of the main pipe and the inner angles of the corners are respectively 145 to 170 degrees.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a header having a plurality of branch pipes protruding on the outer surface of the main pipe in a direction perpendicular to the axis of the main pipe, and having a wrench-engaging corner portion on the outer circumference of the branch pipe.

[0002]

[Prior art]

 Conventionally, as shown in FIG. 4, a hexagonal portion 21 is provided on the outer periphery of the end portion of the main pipe 11 of the header 10 where three branch pipes 20 are branched. The hexagonal portion 21 is used to fix the header 10 with the wrench 3 when connecting a joint or the like to the connection port 22 of the branch pipe 20, and usually a pair of diagonals 23 and 24 of the hexagonal portion 21 are the main pipe 11. It was in the direction of the axis of, and was a regular hexagon or regular octagon.

[0003]

[Problems to be solved by the device]

 When attempting to hang the wrench 3 on the hexagonal portion 21 of the branch pipe, as shown in the figure, the spanner 3 is inclined with respect to the axis of the main pipe 11, so that the shoulder 31 of the wrench 3 is positioned on the adjacent branch pipe. Therefore, it is necessary to provide a sufficient space for the spanner 3 to be hung, and it is necessary to provide a large space between the branch pipe 20 and the adjacent branch pipe 20.

Therefore, in the case of a header having the same number of branch pipes, the overall size becomes large, and handling is difficult. The present invention solves the above problems and provides a compact header joint in which the pitch between the branch pipe provided in the header and the branch pipe can be reduced.

[0005]

[Means for Solving the Problems]

 The gist of the present invention is a header having a main pipe and a plurality of branch pipes protruding in a direction perpendicular to an axis on the outer periphery of the main pipe, and having a wrench-hanging corner portion on the outer circumference of the branch pipe, the corner portions are opposed to each other. The header joint is characterized in that a pair of corners are provided in the axial direction of the main pipe and the inner angles of the corners are respectively 145 degrees to 170 degrees.

[0006]

[Action]

 Since the present invention has the above-mentioned structure, the spanner is applied in a direction substantially perpendicular to the axis of the main pipe. Therefore, the shoulder of the spanner does not go to the position of the adjacent branch pipe, and the pitch interval between the branch pipes can be reduced. It is appropriate that the inner angle of the corner at this axial position is 145 degrees or more in relation to the shoulder of the wrench, and when forming the header by casting etc. from the manufacturing surface When the parting surface of the mold is provided in the axial direction Considering the mold removal gradient, it is preferably 170 degrees or less, which is less than 180 degrees.

[0007]

【Example】

 1 to 3 show an embodiment of the present invention, and FIG. 1 shows a state in which a spanner 3 is attached to a corner portion of a branch pipe. The header joint 4 is composed of a main pipe 41 and three branch pipes 51, 52, 53 which are arranged in a row in the axial direction of the main pipe 41 and project to the outer peripheral side. The inside is a pipe passage through which a fluid passes, respectively. At the end of the, there is a connection port that can be connected to a joint or the like. A hexagonal portion 55 for hanging a wrench is provided on the outer surface of the connection port 54 at the ends of the branch pipes 51, 52 and 53. The hexagonal portion 55 is used for fixing when connecting the joint.

The hexagonal portion 55 is not a regular hexagon, and the inner angles of the corners 56 and 57 of the portion matching the axial direction of the main pipe 41 are set to 160 degrees. When the wrench 3 shown in FIG. 1 is hung on the hexagonal portion 55, the wrench 3 is put in a direction substantially perpendicular to the axis. Therefore, the shoulder 31 of the spanner is not positioned to the adjacent branch pipe, and the distance between the branch pipes can be reduced to a position where the spanner 3 does not hit.

Therefore, if the number of branch pipes is the same, the total length of the header can be made smaller than in the conventional case. Therefore, the weight is reduced and the handling becomes easy. In this embodiment, the corner of the branch pipe is described as a hexagon, but an octagon is also the same.

[0010]

[Effect of device]

 As described above, the header joint of the present invention has a short overall length, is compact, and is easy to handle.

[Brief description of drawings]

FIG. 1 is a plan view showing a state in which a spanner is hung on a branch pipe according to an embodiment of the present invention.

FIG. 2 is a diagram showing a front view of FIG.

3 is a plan view of the branch pipe connection port of FIG. 2. FIG.

FIG. 4 is a plan view showing a state in which a spanner is applied to a branch pipe of a conventional example.

Claims (1)

[Scope of utility model registration request] 1. A header having a main pipe and a plurality of branch pipes projecting in a direction perpendicular to an axis on an outer circumference of the main pipe, and having a corner portion for wrench hanging on the outer circumference of the branch pipe, wherein a pair of the corner portions facing each other is provided. Are provided in the axial direction of the main pipe, and the inner angles of these angles are 145 degrees to 17 degrees, respectively.
Header joint characterized by being 0 degree.