Container or piping connection mechanism

Abstract

To secure the rigidity (reliability) of connection by both welding and a support of a connection part while enhancing the connection rigidity of a weld part by suppressing the thermal stress of the connection part, to prevent the fracture of the whole circumference, and to avoid a risk of a fluid leak from a flange part.SOLUTION: In a vessel or a piping connection mechanism of this invention, in order to solve a problem, portions of two pieces of vessels or piping protruding in an axial direction are made to abut on each other, and the abutment portions are connected to each other by welding. Connection-part supports are arranged at vicinities of connection parts of the portions protruding in the axial direction of the two pieces of vessels or piping so as to oppose each other with a weld part sandwiched therebetween, and connection members for connecting the opposing connection-part supports are arranged at external peripheral sides of the opposing connection-part supports.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a container or a piping connection mechanism, and more particularly to a container or a piping connection mechanism suitable for a container having an internal fluid and being used under high temperature and pressure. [Background technology]

[0002] As a prior art document relating to a container or piping connection mechanism, for example, Patent Document 1 describes a joining structure between tubular members that can prevent fluid leakage when joining tubular members that are unavoidably subject to thermal expansion differences, such as a fuel nozzle for a gas turbine combustor.

[0003] This patent document 1 describes how a pair of pipe members through which a fluid passes are each formed with a flange, the flanges are butted together and seal welded at their joints, the welded flanges are then clamped together with clamping members and tightened with bolts and nuts to generate surface pressure between the flange end faces, thereby reducing thermal stress at the seal welds, and how, because the seal welds are subjected to compressive force, no fluid leakage will occur even if a crack occurs in the seal welds. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2004-68997 A Summary of the Invention [Problem to be solved by the invention]

[0005] In nuclear reactor facilities, the occurrence of full-circumference rupture must be taken into consideration when welding connections between pipes or between piping and vessels or valves. However, full-circumference rupture can be avoided by using flange connections with bolts to connect pipes to each other or between piping and vessels or valves.

[0006] That is, by using a double connection structure with welding and bolts, it is possible to avoid circumferential rupture, but the above-mentioned flange connection has the problem of increasing the potential for leakage from connections between pipes or between containers or valves and pipes.

[0007] The above-mentioned Patent Document 1 describes a joining structure for pipe components that can prevent fluid leakage when joining pipe components that cannot avoid thermal expansion differences, but there is still room for improvement in order to further reduce the risk of fluid leakage from the flange portion.

[0008] The present invention has been made in consideration of the above-mentioned points, and an object of the present invention is to provide a container or piping connection mechanism that can suppress thermal stress at the welded part to increase the connection strength of the welded part, while ensuring the strength (reliability) of the connection by both the weld and the connection support, thereby preventing all-around breakage and avoiding the risk of fluid leakage from the flange part. [Means for solving the problem]

[0009] In order to achieve the above object, the container or pipe connection mechanism of the present invention includes abutting the axially protruding portions of two containers or pipes, and connecting the axially protruding portions of the two containers or pipes to each other. tree If circle A vessel or piping connection mechanism, in which the connection parts are connected by welding, A connection support is provided near the connection of the axially protruding portions of the two containers or pipes, facing each other across the welded portion, and a bolt is provided on the outer periphery of the facing connection support to fasten the facing connection support to each other; The connection supports provided to face each other are fastened by a plurality of the bolts provided at predetermined intervals in the circumferential direction, The connection portion of the axially protruding portion of the container or piping is a pipe member integral with the container at a portion extending in the axial direction from a nozzle portion of the container, and a pipe member integral with the valve box at a portion extending in the axial direction from the valve box, The connection portion supports provided to face each other are fixed to the tube member of the container and the tube member of the valve box by drilling holes in the tube member of the container and the tube member of the valve box that do not radially penetrate the tube member of the container and the tube member of the valve box, and inserting the connection portion supports provided to face each other into each of the holes. 、 A gasket is attached to each of the connection supports fixed to the tube member of the container and the tube member of the valve body so as to be adjacent to and face each other, and a spacer is provided between the gaskets attached so as to face each other. It is characterized by: Effect of the Invention

[0010] According to the present invention, the connection support suppresses thermal stress at the weld and increases the connection strength of the weld, while ensuring the strength (reliability) of the connection through both the weld and the connection support, thereby preventing all-around fracture and avoiding the risk of fluid leakage from the flange portion. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a cross-sectional view showing a first embodiment of the container or piping connection mechanism of the present invention, illustrating the connection mechanism between the container and the valve body. [Diagram 2] FIG. 11 is a cross-sectional view showing a second embodiment of the container or piping connection mechanism of the present invention, illustrating the connection mechanism between the container and the valve body. [Diagram 3] FIG. 3 is a half cross-sectional view showing a connection support cover employed in the connection mechanism between the container and the valve body in FIG. 2. [Figure 4] FIG. 11 is a cross-sectional view showing a third embodiment of the container or piping connection mechanism of the present invention, illustrating the connection mechanism between the container and the valve body. [Diagram 5] FIG. 10 is a cross-sectional view showing a fourth embodiment of the container or piping connection mechanism of the present invention, illustrating the connection mechanism between the container and the valve body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The container or piping connection mechanism of the present invention will be described below based on the illustrated embodiments. In each embodiment, the same reference numerals are used for the same components.

[0013] In addition, the embodiments described below will be explained using the connection mechanism between the container 1 and the valve box 2 as an example, but the present invention is not limited to the connection mechanism between the container 1 and the valve box 2, and can also be applied to connection mechanisms with other elements, such as between pipes, containers and pipes, and valve boxes and pipes. EXAMPLES

[0014] 1 shows a first embodiment of the container or piping connection mechanism of the present invention. The embodiment shown in the figure is a connection mechanism between a container 1 and a valve body 2.

[0015] In the connection mechanism between the container 1 and the valve box 2 of this embodiment shown in Figure 1, the tube member 3 of the container 1 is a part that extends in the axial direction (a part that protrudes in the axial direction) from the nozzle portion 1a of the container 1 without a welding connection, while the tube member 4 of the valve box 2 is a part that extends in the axial direction (a part that protrudes in the axial direction) from the valve box 2 without a welding connection, and the tube member 3 of the container 1 and the tube member 4 of the valve box 2 are each provided with disk-shaped connection supports 7 and 8 at a position (a position distant by a distance "W" in Figure 1) at least 2T or more (T is the thickness of the tube member 4 of the valve box 2 or the tube member 3 of the container 1) away from the welded part 10 (the same applies to Examples 2 and 3 described below).

[0016] The above-mentioned connection supports 7 and 8 are fixed at a position at least 2T or more away from the weld 10 between the pipe member 3 of the vessel 1 and the pipe member 4 of the valve box 2 (positions at a distance "W" in Figure 1) because, in consideration of the inspectability of welding inspection (e.g., ultrasonic testing) after welding the pipe member 3 of the vessel 1 and the pipe member 4 of the valve box 2, if the connection supports 7 and 8 are positioned at a distance required for inspecting the weld 10 (e.g., a distance at which ultrasonic testing of the weld 10 can be performed using an inspection device) (W is 2T or more), there will be no problem in performing ultrasonic testing, for example (the same applies to Examples 2 and 3 described below).

[0017] In addition, in this embodiment, the height (indicated by the symbol "C" in Figure 1) of the connection supports 7 and 8 from the pipe member 3 of the container 1 or the pipe member 4 of the valve box 2 is set to be D / 10 or more, where "D" is the outer diameter dimension of the pipe member 3 of the container 1 or the pipe member 4 of the valve box 2 (the same applies to embodiments 2 and 3 described below).

[0018] This is based on the fact that the height "C" of the connection supports 7 and 8 from the pipe member 3 of the container 1 or the pipe member 4 of the valve box 2, which does not interfere with the fastening of the connection supports 7 and 8 with the bolt 9, is sufficient if it is greater than or equal to D / 10 of the outer diameter dimension "D" of the pipe member 3 of the container 1 or the pipe member 4 of the valve box 2 (the same applies to Examples 2 and 3 described below).

[0019] In addition, the above-mentioned connection supports 7 and 8 are fixed to the pipe member 3 of the container 1 and the pipe member 4 of the valve box 2 by drilling bolt holes in the pipe member 3 of the container 1 and the pipe member 4 of the valve box 2 and inserting the connection supports 7 and 8 into the respective bolt holes.

[0020] Furthermore, the connection portion 5 of the pipe member 3 of the container 1 and the connection portion 6 of the pipe member 4 of the valve box 2 are connected by welding over their entire circumferences and from the outer surface to the inner surface of both the connection portions 5, 6.

[0021] Moreover, in this embodiment, after the above welding, the connection supports 7 and 8 are connected with bolts 9 at at least four or more points (four points in this embodiment) at equal angular intervals in the circumferential direction. The connection of the connection supports 7 and 8 with bolts 9 applies a compressive stress in the axial direction to the welded parts 10 of the connections 5, 6, so that the force tending to separate the welded parts 10 can be alleviated and the reliability of the welded parts 10 of the connections 5, 6 is improved.

[0022] According to the configuration of this embodiment, the strength (reliability) of the connections 5 and 6 between the pipe member 3 of the container 1 and the pipe member 4 of the valve box 2 can be ensured by both welding and bolted connections using the connection supports 7 and 8, and leak resistance is ensured by all-around welding. Even if the weld 10 breaks, the probability that at least four bolts 9 will break simultaneously is extremely small, so the bolted connection between the weld supports 7 and 8 can avoid the risk of all-around breakage. Therefore, the connection supports 7 and 8 suppress the thermal stress of the weld 10 and increase the connection strength of the weld 10, while the strength (reliability) of the connection is ensured by both welding and the connection supports 7 and 8, preventing all-around breakage and avoiding the risk of fluid leakage from the flange portion. EXAMPLES

[0023] 2 and 3 show a second embodiment of the container or piping connection mechanism of the present invention.

[0024] FIG. 2 shows a connection mechanism between a vessel 1 and a valve body 2 according to this embodiment, and FIG. 3 shows a connection portion support cover 11 employed in the connection mechanism between the vessel 1 and the valve body 2 of FIG.

[0025] The connection mechanism between the container 1 and the valve box 2 in this embodiment shown in the figure has a configuration that is approximately the same as that of embodiment 1, but in this embodiment, a ring gasket 12 is fitted into a fitting groove formed in the connection supports 7 and 8, and the connection portion 5 of the pipe member 3 of the container 1 and the connection portion 6 of the pipe member 4 of the valve box 2 are fixed by welding around the entire circumference and from the outer surface to the inner surface of both connection portions 5, 6. Moreover, in this embodiment, after welding the connection portion 5 of the pipe member 3 of the container 1 and the connection portion 6 of the pipe member 4 of the valve box 2, the connection portion supports 7, 8 are sandwiched between semi-disc-shaped connection portion support covers 11, and after the connection portion supports 7, 8 are sandwiched between the connection portion support covers 11, the semi-disc-shaped connection portion support covers 11 are connected using bolts 13, as shown in FIG. 3.

[0026] By fastening the semi-disk-shaped connection support cover 11 with the bolts 13, the ring gasket 12 can be crushed by surface pressure, thereby ensuring leak resistance.

[0027] With the configuration of this embodiment, it is of course possible to obtain the same effects as in embodiment 1, and although there is a possibility of small leaks at the welded joints 10 of the connections 5, 6 of the connection supports 7, 8, the connection support cover 11 and the ring gasket 12 make it possible to further prevent leaks.

[0028] Although the fitting groove and ring gasket 12 are provided on the connection support 7, 8 side, the same effect can be obtained even if they are provided on the weld support cover 11 side. EXAMPLES

[0029] 4 shows a third embodiment of the container or piping connection mechanism of the present invention. The embodiment shown in this figure is a connection mechanism between a container 1 and a valve body 2.

[0030] The connection mechanism between the container 1 and the valve box 2 of this embodiment shown in the figure has a configuration that is approximately the same as that of embodiment 1, but in this embodiment, gaskets 15a and 15b are attached to the tube member 3 of the container 1 and the tube member 4 of the valve box 2, respectively, and a spacer 14 is installed between the gaskets 15a and 15b attached to the tube member 3 of the container 1 and the tube member 4 of the valve box 2.

[0031] According to the configuration of this embodiment, not only can the same effects as in the first embodiment be obtained, but also, even if the welded portion 10 is slightly broken, the gaskets 15a, 15b and the spacer 14 can prevent fluid leakage from the pipe (welded portion 10). EXAMPLES

[0032] 5 shows a fourth embodiment of the container or piping connection mechanism of the present invention. The embodiment shown in this figure is a connection mechanism between a container 1 and a valve body 2.

[0033] As shown in Figure 5, in this embodiment, connection parts 5 and 6 of the pipe member 3 of the vessel 1 and the pipe member 4 of the valve box 2 are connected by a welded part 10. Furthermore, a connection part support 7 is provided on the pipe member 4 of the valve box 2, and a bolt hole 1b is drilled in the wall of the vessel 1. The connection part support 7 is fixed by inserting a bolt 9 into the bolt hole 1b drilled in the wall of the vessel 1.

[0034] In Figure 5, a connection support 7 is provided on the pipe member 4 of the valve box 2, a bolt hole 1b is drilled in the wall of the container 1, and the connection support 7 is fixed by inserting a bolt 9 into the bolt hole 1b drilled in the wall of the container 1; however, the connection support 7 may be provided on the pipe member 3 of the container 1, a bolt hole is drilled in the wall of the valve box 2, and the connection support 7 may be fixed by inserting a bolt 9 into the bolt hole drilled in the wall of the valve box 2.

[0035] According to such a configuration of the present embodiment, it is possible to obtain the same effects as those of the first embodiment, and in addition, the connection mechanism between the container 1 and the valve box 2 is simplified as compared to the first embodiment.

[0036] The present invention is not limited to the above-mentioned embodiment, but includes various modified examples. For example, the above-mentioned embodiment has been described in detail to clearly explain the present invention, and is not necessarily limited to those having all of the configurations described. Also, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add another embodiment to the configuration of one embodiment. Also, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration. [Explanation of symbols]

[0037] 1...container, 1a...nozzle portion of container, 1b...bolt hole, 2...valve box, 3...tube member of container, 4...tube member of valve box, 5...connection portion of tube member of container, 6...connection portion of tube member of valve box, 7, 8...connection support, 9, 13...bolt, 10...welded portion, 11...connection support cover, 12...ring gasket, 15a, 15b...gasket, 14...spacer.

Claims

1. A container or pipe connection mechanism in which axially protruding portions of two containers or pipes are butted together and the butted portions are connected by welding, A connection support is provided near the connection of the axially protruding portions of the two containers or pipes, facing each other across the welded portion, and a bolt is provided on the outer periphery of the facing connection support to fasten the facing connection support to each other; The connection supports provided to face each other are fastened by a plurality of the bolts provided at predetermined intervals in the circumferential direction, The connection portion of the axially protruding portion of the container or piping is a pipe member integral with the container at a portion extending in the axial direction from a nozzle portion of the container, and a pipe member integral with the valve box at a portion extending in the axial direction from the valve box, The connection portion supports provided to face each other are fixed to the tube member of the container and the tube member of the valve box by drilling holes in the tube member of the container and the tube member of the valve box, respectively, that do not radially penetrate the tube member of the container and the tube member of the valve box, and inserting the connection portion supports provided to face each other into each of the holes; A container or piping connection mechanism characterized in that a gasket is attached to each of the connection supports fixed to the pipe member of the container and the pipe member of the valve box so as to be adjacent to and facing the connection support, and a spacer is installed between the gaskets attached so as to face each other.

2. 2. The container or piping connection mechanism according to claim 1, A container or piping connection mechanism characterized in that the connection support is connected to a position at least 2T or more (where T is the thickness of the tube member of the valve box or the tube member of the container) away from the welded portion of the tube member of the container and the tube member of the valve box.

3. 3. The container or piping connection mechanism according to claim 2, A container or piping connection mechanism characterized in that the height of the connection support from the container pipe member or the valve box pipe member is D / 10 or more, where "D" is the outer diameter dimension of the container pipe member or the valve box pipe member.

Images