Branch pipe

Abstract

To provide a branch pipe etc., capable of ensuring uniform flow rates of concrete at respective discharge parts while branching off into three or more.SOLUTION: A branch pipe 1 branches off to transport pumped concrete C. The branch pipe 1 has three or more tubular discharge parts 12, discharging the concrete C, connected to a tubular inflow part 11 into which the concrete C flows perpendicularly so as to extend outward from the inflow part 11 on a horizontal plane. The discharge parts 12 are arranged on the horizontal plane at equal intervals in the circumferential direction around the inflow part 11.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a branch pipe or the like for branching and transporting pumped concrete. [Background technology]

[0002] Conventionally, in order to pour concrete over a wide area, a concrete pressure pipe is branched and concrete is poured at multiple locations simultaneously. For example, Patent Document 1 describes a method in which a vertical pipe is branched into two paths, left and right, by a branch pipe, and concrete is poured through the left and right horizontal pipes. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-193282 Summary of the Invention [Problem to be solved by the invention]

[0004] When a concrete pumping pipe is branched into three or more paths and poured over a wider area, multiple bifurcated branch pipes 100, the plan view of which is shown in Figure 5(a), are usually used. However, when multiple bifurcated branch pipes 100 are used, it is necessary to secure a large space for arranging the piping components and to provide a shutter valve or the like for adjusting the flow rate.

[0005] On the other hand, it is also possible to branch the branch pipe into three or more branches, but in this case, problems with the flow rate arise. For example, concrete C pumped into the inlet 101 of a three-way branch pipe 100a, the plan view of which is shown in Figure 5(b), flows more into the outlet 102 (the middle outlet 102 in Figure 5(b)) of the three outlets 12, which has a direction similar to that of the inlet 101, resulting in uneven flow rates of concrete C among the outlets 102.

[0006] In this way, in a branch pipe in which the inlet section 101 and the discharge section 102 are arranged on the same plane, if three or more discharge sections 102 are provided, the difference in orientation between the inlet section 101 and the discharge section 102 will differ depending on the discharge section 102, which will cause the flow rate of concrete C at each discharge section 102 to be uneven.

[0007] The present invention has been made in consideration of the above problems, and its object is to provide a branch pipe or the like that can branch into three or more branches while making the flow rate of concrete at each discharge port uniform. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the present invention provides a branch pipe for branching and transporting pumped concrete, in which a tubular inlet section into which the concrete flows in a vertical direction is connected to three or more tubular outlet sections for discharging the concrete so as to extend outward from the inlet section in a horizontal plane. The branch pipe is formed by a plurality of bent pipes of the same shape arranged radially on the horizontal plane and having bent portions that bend in the vertical direction, and at the position corresponding to the inlet portion, a wall surface at one end of each bent pipe is cut out, and the edges of the notched positions of the wall surfaces of adjacent bent pipes are joined together. This is a branch pipe characterized by the above.

[0009] In this invention, the discharge section is connected to the inlet section, into which concrete flows vertically, so that it extends outward from the inlet section in a horizontal plane. By not arranging the inlet section and the discharge section on the same plane in this way and by configuring the branch pipes in a three-dimensional manner, it is possible to equalize the difference in the orientation of the inlet section and the discharge section among three or more discharge sections, and to equalize the amount of concrete flowing from the inlet section to each discharge section.

[0010] It is desirable that three or more of the discharge sections are arranged at equal intervals in the circumferential direction around the inlet section on the horizontal plane, or that multiple discharge sections are arranged at equal intervals in the circumferential direction around the inlet section on the horizontal plane, and that another multiple discharge sections are arranged at positions obtained by rotating a set of the multiple discharge sections in the circumferential direction. This allows three or more discharge portions to be arranged in a balanced manner in each direction on a horizontal plane.

[0011] In the present inventionThe branch pipe is formed by a plurality of bent pipes of the same shape arranged radially on the horizontal plane and having bent portions that bend in the vertical direction, and at the position corresponding to the inlet portion, the wall surface of one end of each bent pipe is cut out, and the edges of the cutout positions of the wall surfaces of adjacent bent pipes are joined together. To This makes it easier to manufacture the branch pipe. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a branch pipe or the like that can branch into three or more branches while making the flow rate of concrete at each discharge port uniform. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] 12 is an example of a discharge section 12. [Figure 4] 10 shows an example of the arrangement of the discharge portion 12 on a horizontal plane. [Figure 5] FIG. 2 is a diagram showing branch pipes 100 and 100a. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0015] FIG. 1(a) is a diagram showing a branch pipe 1 according to an embodiment of the present invention. The branch pipe 1 is a piping component for branching and transporting pressure-fed concrete C. The branch pipe 1 has a tubular inlet section 11 through which pressure-fed concrete C in a pipe 3a flows vertically, and three tubular outlet sections 12 through which the concrete C is discharged into each of three pipes 3b. In this embodiment, the inlet section 11 and the outlet section 12 are made of steel, but the materials of the inlet section 11 and the outlet section 12 are not particularly limited.

[0016] 1(b) is a view of the branch pipe 1 as seen from above. The three discharge sections 12 described above are connected so as to extend radially outward from the inlet section 11 in a horizontal plane. The three discharge sections 12 are also arranged at equal intervals (approximately 120° intervals) in the circumferential direction around the inlet section 11 in the horizontal plane.

[0017] The branch pipe 1 can be manufactured using three bent pipes 2 of the same shape as shown in Figure 2. The bent pipes 2 are cylindrical pipes bent into an arc of approximately 90°, and are arranged so that one end 21 faces vertically. In addition, a bent portion 23 is provided midway along the bent pipe 2, where the bent pipe 2 is bent vertically.

[0018] The wall surface of the bent pipe 2 is cut out in the vertical direction at the end 21 of the bent pipe 2. Three bent pipes 2 are radially arranged on a horizontal plane so that the edges 22 at the cutout positions are in contact with each other between adjacent bent pipes 2, and the edges 22 are joined together to form the branch pipe 1 shown in Fig. 1(a).

[0019] The end 21 of each bent pipe 2 constitutes the inlet section 11 of the branch pipe 1. The edges 22 of adjacent bent pipes 2 are joined by welding, and the bottom of the inlet section 11 is closed by welding a plate. Reference numeral 13 in Fig. 1(a) indicates the joint between the edges 22, and reference numeral P in Fig. 1(b) indicates the plate.

[0020] As described above, in the branch pipe 1 of this embodiment, the discharge section 12 is connected to the inlet section 11, into which the concrete C flows in the vertical direction, so as to extend outward from the inlet section 11 in a horizontal plane. By not arranging the inlet section 11 and the discharge section 12 on the same plane in this way and by configuring the branch pipe 1 in a three-dimensional manner, it is possible to equalize the difference in orientation between the inlet section 11 and the discharge section 12 among three or more discharge sections 12, and it is possible to uniform the amount of concrete C flowing from the inlet section 11 to each discharge section 12.

[0021] In this embodiment, the discharge sections 12 are arranged at equal intervals in the circumferential direction around the inlet section 11, so that the discharge sections 12 can be arranged in a balanced manner in each direction on a horizontal plane, making it easy to pour concrete C over a wide area through the branch pipe 1. Furthermore, in the case where the branch pipe 1 is arranged with the discharge section 12 facing downward as shown in Figure 1(a), the branch pipe 1 can be placed on the ground or the like to ensure that it stands upright, and the arrangement of the branch pipe 1 is stable.

[0022] Furthermore, as described above, the branch pipe 1 of this embodiment has a rational shape that can be easily formed using a bent pipe 2 of the same shape having a bent portion 23, which makes it easy to manufacture the branch pipe 1.

[0023] However, the present invention is not limited to the above embodiment. For example, the method of manufacturing the branch pipe 1 is not limited to that described with reference to FIG.

[0024] Furthermore, the branch pipe 1 of this embodiment is arranged with the inlet section 11 at the top and the outlet section 12 at the bottom, as shown in the side view of Fig. 3(a), but as shown in Fig. 3(b), it may be arranged with the inlet section 11 at the bottom and the outlet section 12 at the top, and concrete C pumped vertically from below into the inlet section 11 is discharged from the upper outlet section 12. However, in the case of Fig. 3(a), as described above, the branch pipe 1 can be placed on the ground or the like to make it self-standing, which has the advantage of stably positioning the branch pipe 1.

[0025] Furthermore, in the branch pipe 1 of this embodiment, the tip of the discharge portion 12 faces horizontally as shown in Fig. 3(a), and concrete C is discharged horizontally, but concrete C may be discharged obliquely relative to the horizontal as shown in Fig. 3(c), or concrete C may be discharged vertically as shown in Fig. 3(d). In either case, it is sufficient that the discharge portion 12 is disposed so as to extend outward from the inlet portion 11 when viewed from a horizontal plane. For example, as shown in Fig. 3(e), the discharge portion 12 may be configured linearly extending obliquely relative to the inlet portion 11.

[0026] Furthermore, as shown schematically in Fig. 4(a), the branch pipe 1 of this embodiment has three discharge sections 12 arranged at equal intervals around the inlet section 11, but the number of discharge sections 12 is not limited to three, and it is also possible to provide four or more discharge sections 12. Fig. 4(b) shows an example in which four discharge sections 12 are arranged at equal intervals (approximately 90° apart).

[0027] Furthermore, the arrangement of the discharge sections 12 is not limited to the above-described arrangement in which all of the discharge sections 12 are arranged at equal intervals. For example, as shown in Fig. 4(c), a configuration may be adopted in which two discharge sections 12 (12-1) are arranged at equal intervals (approximately 180° apart) in the circumferential direction around the inlet section 11, and two discharge sections 12 (12-2) are arranged at positions obtained by rotating the pair of discharge sections 12 (12-1) in the circumferential direction. A total of four discharge sections 12 are arranged symmetrically with respect to two orthogonal axes (see symbols x and y) in a horizontal plane passing through the center of the inlet section 11.

[0028] Although the above is an example in which two discharge units 12 are used as a set, three or more discharge units 12 may be used as a set. In the example of Figure 4(d), the configuration includes three discharge units 12 (12-1) arranged at equal intervals (approximately 120° intervals) in the circumferential direction, and three discharge units 12 (12-2) arranged at positions obtained by rotating the set of discharge units 12 (12-1) in the circumferential direction. Even in the cases of Figures 4(c) and (d), the discharge units 12 can be arranged in a balanced manner in each direction on the horizontal plane.

[0029] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that those skilled in the art can conceive of various modifications and alterations within the scope of the technical ideas disclosed in this application, and it is understood that these modifications and alterations also fall within the technical scope of the present invention. [Explanation of symbols]

[0030] 1, 100, 100a: Branch pipe 2: Bent pipe 11, 101: Inflow section 12, 102: Discharge part 21:End 22: Edge 23: Bend point

Claims

1. A branch pipe for branching and transporting pumped concrete, Three or more tubular discharge portions for discharging the concrete are connected to a tubular inlet portion through which the concrete flows in vertically so as to extend outward from the inlet portion in a horizontal plane, the branch pipe is formed by a plurality of bent pipes of the same shape arranged radially on the horizontal plane and having bent portions that bend in the vertical direction, A branch pipe characterized in that the wall of one end of each bent pipe is notched at the position corresponding to the inlet section, and the edges of the notched positions on the wall of adjacent bent pipes are joined together.

2. On the horizontal plane, three or more of the discharge portions are arranged at equal intervals in a circumferential direction around the inlet portion, or 2. The branch pipe according to claim 1, wherein, on the horizontal plane, a plurality of the discharge portions are arranged at equal intervals in a circumferential direction around the inlet portion, and another plurality of the discharge portions are arranged at positions obtained by rotating a set of the plurality of the discharge portions in the circumferential direction.

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