JP2996904B2 - How to make a piping connection block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a pipe connection block for connecting pipes having a very narrow pitch.

[0002]

2. Description of the Related Art Conventionally, piping for various facilities and equipment used in energy plants, nuclear power plants and the like has been required to assemble and construct narrow pipe arrays.
For example, the cooling pipe 3 of the first wall 2 of the blanket module 1 of the fusion reactor shown in FIG. 21 has a simple flow path configuration of one pass [in this example, FAPIG NO.
There is a first wall of the fusion experimental reactor disclosed in 135 (1993-3), pp. 18-24. ], The temperature difference of the coolant (water) cannot be made large. That is, since the flow path is short, it is difficult to obtain a temperature difference. In order to easily obtain a temperature difference, it is necessary to lengthen the flow path. In order to lengthen the flow path, it is conceivable that the flow path is folded to form an odd number of times, for example, three-pass pipes 4 as shown in FIG.

However, in the case of a three-pass pipe 4, FIG.
As shown in FIG. 3, the space between the tubes 4a can be expanded at most to the size of the tube 4a. This is because if the pitch of the tubes 4a is increased, the heat removal performance is reduced. Therefore, the pipe 4 needs to be bent as shown in FIG.

[0004] In general, when a circular pipe made of stainless steel or the like used in an energy plant, a nuclear power plant, or the like is to be bent without difficulty, a bending radius R is defined as an outer diameter d of the circular pipe.
It is necessary that 3d <R. Since the pipe 4 is a square tube, it is difficult to bend even if the bending radius R is three times the size of the square tube. Therefore, it is impossible to assemble and construct a narrower tube array.

[0005] However, in the case of a general pipe having a long length, it is necessary to support the middle thereof to prevent vibration.
In addition, when the pipe ends of a plurality of general parallel pipes are collectively supported or the flow direction is changed, a large jig or a joint device is required, and the communication with the header requires a pipe sheet. It will intervene. Therefore, the assembly workability is poor.

Accordingly, the present invention provides a bend pipe substitute function, a connection function with a collecting pipe, a flow control function, a pipe support function and a vibration damping function, in order to realize simplification and efficiency of assembling and narrowing a narrow pipe arrangement. An object of the present invention is to provide a method of manufacturing a pipe connection block having a header function.

[0007]

Means for Solving the Problems One of the methods for manufacturing the pipe connection block of the present invention for solving the above-mentioned problems is rectangular.
Prepare two metal blocks in the shape of
The mating surface of the lock must be
The groove is machined, and then a thin wall is formed in the groove of one metal block.
Set the piping of
Overlap the machined surface of one metal block to seal
Contact, and then hot isostatic bonding
It is.

[0008] The method of manufacturing a pipe connection block according to the present invention.
The other one is to make two metal blocks by sintering SUS powder and then to form grooves in the mating surface of the sintered blocks symmetrically along the required flow path pattern. Set the thin-walled pipe in the groove of the sintered block, superimpose the processed surface of the other sintered block on the processed surface of one sintered block, seal-weld, and then perform hot isostatic pressure bonding It is characterized by the following.

The method for manufacturing a pipe connection block according to the present invention is a hot isostatic pressure method in which a thin-walled pipe is sandwiched between two metal blocks formed by drilling and symmetrically grooved along a required flow path pattern. Since it is manufactured by joining or the like, it can be manufactured accurately without any trouble with a narrow flow path interval, and can contribute to the simplification and efficiency of assembling and constructing a narrow pipe array.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the structure of a pipe connection block manufactured by the method for manufacturing a pipe connection block according to the present invention will be described with reference to FIG. 1. An inlet channel 11 having a rectangular cross section is parallel to a rectangular metal block 10. Three inlet channels 11 are provided at an interval of 1.5 times the channel diameter, and two adjacent inlet channels 11 are communicated as a set of two inside the block 10 through a right-angled flow passage 12, and the remaining one inlet flow The road 11 is extended through the other surface. Piping connection block 13 having such a structure
Is a blanket module 1 of the fusion reactor shown in FIG.
To be applied as a 180-degree bend tube substitute to the folded end of the three-pass pipe 4 shown in FIG.
As a result, as shown in FIG. 2, narrow pipe arrangement assembling and construction can be performed.

In consideration of the connection of the pipe 4 with the header 5 shown in FIG.
As shown in FIG.
There is also a pipe connection block 13 ′ in which 4 is formed. In order to manufacture the pipe connection block 13 ', generally, three inlet channels 11 are formed in parallel with the metal block 10 as shown in FIG. Inlet channel 11
As shown in FIG. 4b, a hole is formed vertically from above to form a flow passage 12 and communicate therewith, and the remaining one inlet flow passage 1 is formed.
An outlet channel 14 is formed by drilling from the side surface at the end of the first channel 1 and communicates therewith. As shown in FIG.
2 'is sealed, but in one of the manufacturing methods of the present invention, FIG.
A, rectangular metal blocks 10a, 10a
Are prepared, and the two metal blocks 10a and 10
As shown in FIG. 5b, grooves 11a and 11b each having a rectangular cross section are machined symmetrically on the mating surface of a, and a hole 11c is formed through the hole 11c toward the outer surface at the deep end of the groove 11b of one of the metal blocks 10a. Then, as shown in FIG. 5c, the processing surfaces are joined together and sealed and welded, and then hot isostatically joined to form a pipe connection block 13 '.

[0012] Another example of the structure of the pipe connection block to manufacture in the fabrication method of the pipe connecting block of the present invention will be explained with reference to FIG. 6, the rectangular metallic block 10,
Three inlet channels 11 ′ having a circular cross section are provided in parallel at a narrow interval of one time the channel diameter, and these inlet channels 11 ′ are communicated with one outlet channel 15 at right angles in the block 10. ing. The piping connection block 16 having such a structure is shown in FIG.
Is used for connection with the parallel collecting pipe 17 as shown in FIG.

To manufacture the pipe connection block 16 of FIG. 6 by one of the manufacturing methods of the present invention, two rectangular metal blocks 10a, 10a are prepared as shown in FIG. On the mating surface of the body metal blocks 10a, 10a,
As shown in FIG. 8b, the cross section is symmetrical along a flow path pattern formed by three inlet flow paths 11 'shown in FIG. 6 and an outlet flow path 15 communicating with the ends thereof at right angles. The semicircular groove 19 is machined, and then, as shown in FIG. 8C, the machined surfaces are aligned and seal welded, and then hot isostatically joined.

[0014] To describe still another example of the structure of the pipe connection block to manufacture in the fabrication method of the pipe connecting block of the present invention by FIG. 9, a rectangular metal block 1
0, two large-diameter inlet channels 11a are provided in parallel, and small-diameter outlet channels 14a are respectively connected to the inlet channels 11a. The pipe connection block 20 having such a structure can control the flow rate by itself, and is useful as an orifice substitute.

To manufacture the piping connection block 20 of FIG. 9 by one of the manufacturing methods of the present invention, two rectangular metal blocks 10a, 10a are prepared as shown in FIG.
At the mating surface of the two metal blocks 10a, 10a, two large diameter inlet channels 11 shown in FIG.
A and a large and small groove 21 having a semicircular cross section as shown in FIG. 10B are formed along a flow path pattern composed of a and an outlet flow path 14a having a small diameter connected thereto. 10C, a thin pipe 22 composed of a large diameter portion 22a and a small diameter portion 22b is set in a groove 21 of one metal block 10a, and the other metal block is set as shown in FIG. The processing surface of 10a is overlapped with the processing surface of one metal block 10a and seal welding 23 is performed,
Thereafter, hot isostatic bonding is performed.

[0016] another example of the structure of the pipe connection block to manufacture in the fabrication method of the pipe connecting block of the present invention will be explained with reference to FIG. 11, a rectangular metal block 10, the passage diameter 0.8 times the Three straight passages 24a are provided at the center at narrow intervals, and two bending passages 24b are provided on both sides thereof. Piping connection block 25 having such a structure
As shown in FIG. 12, the block 25 is fixed to a fixing portion 26 in equipment or equipment, and a long pipe 27 is connected to each of the flow paths 24a and 24b, so that the long pipe 27 is supported. As a result, vibration is prevented, so that the tube has a tube supporting function and a vibration isolating function.

In order to manufacture the pipe connection block 25 shown in FIG . 11, three straight passages 24a are generally formed in the metal block 10 in parallel with the center thereof as shown in FIG. Then, as shown in FIG. 13b, a flow path 24b 'is formed on both sides of the flow path 24b' from the opposite surfaces to the middle, and a flow path 24b "is formed on both ends of the flow path 24b 'at the back end thereof. The advancing channel 24b is formed, but in the present invention, it is manufactured in the same process as in FIGS.

[0018] another example of the structure of the pipe connection block to manufacture in the fabrication method of the pipe connecting block of the present invention will be explained with reference to FIG. 14, a rectangular metal block 10, the inlet (or outlet) channel 11 Are parallel to each other and
Four flow paths 11 are provided at twice the narrow interval, and these flow paths 11 are communicated with one communication path 28 in a block at right angles inside the block.
In the case of this example, one outlet (or inlet) channel 29 is connected from the opposite direction of the channel 11. The piping connection block 30 having such a structure can be used not only as a header, but also for changing a flow path, and can also be used as an outlet or an entrance of a collecting pipe.

In order to manufacture the pipe connection block 30 of FIG. 14 by another method of the present invention, as shown in FIG. 15A, two metal blocks are sintered with SUS powder. Then, on the mating surface of the sintered block 31, FIG.
5b, the flow path 11, the communication path 28, and the flow path 2
The grooves 32 having a semicircular cross section are formed symmetrically along the flow path pattern consisting of 9 and then a thin pipe 33 is set in the grooves 32 of one sintered block 31 as shown in FIG. Next, the work surface of the other sintered block 31 is overlapped with the work surface of the one sintered block 31 as shown in FIG. 15D, seal welding 34 is performed, and then hot isostatic pressing is performed.

[0020] Thus the respective pipes connecting block was manufactured by a manufacturing method of the pipe connecting block of the present invention 13, 1
The required flow paths of 6, 20, 25, and 30 are shown in FIGS.
Piping units 36, 37, 38, 39, and 40 are formed by butt-welding the piping 35 as shown in FIG. These piping units 36, 37, 38,
39 and 40 are used in the right places for various facilities and equipment in energy plants and nuclear power plants.
Piping work is simplified and streamlined.

[0021]

As can be seen from the above description, the method for manufacturing a pipe connection block according to the present invention is characterized in that a thin pipe is sandwiched between two metal blocks symmetrically grooved along a required flow path pattern. Function, bend pipe replacement function, connection function with collecting pipe, flow rate control, etc. We manufacture pipe connection blocks that have at least one of the functions, pipe support function, vibration isolation function, and header function. In this case, a conventional jig and a joint device are not required, and a narrow pipe arrangement can be easily assembled and constructed. Various piping units are configured by butt-welding the respective pipes to required flow paths of the pipe connection block manufactured by the manufacturing method of the present invention. And streamline.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of the structure of a piping connection block manufactured by the method for manufacturing a piping connection block of the present invention.

FIG. 2 is a perspective view showing a state in which the piping connection block of FIG. 1 is applied to a folded end of a three-pass piping on a first wall of a blanket module of a fusion reactor.

FIG. 3 is a perspective view showing a partially modified example of the piping connection block of FIG. 1;

FIG. 4 is a view showing a general method of manufacturing the piping connection block of FIG. 3, and FIGS.

5 shows one of the manufacturing methods of the present invention for manufacturing the piping connection block of FIG. 3, and a to c are process diagrams.

FIG. 6 is a perspective view showing another example of the structure of the pipe connection block manufactured by the method for manufacturing a pipe connection block of the present invention.

FIG. 7 is a perspective view showing a use state of the piping connection block of FIG. 6;

8 shows one of the manufacturing methods of the present invention for manufacturing the piping connection block of FIG. 6, wherein a to c are process diagrams.

FIG. 9 is a perspective view showing still another example of the structure of the piping connection block manufactured by the method for manufacturing a piping connection block of the present invention.

FIG. 10 shows one of the manufacturing methods of the present invention for manufacturing the piping connection block of FIG. 9, and a to d are process diagrams thereof.

FIG. 11 is a perspective view showing still another example of the structure of a piping connection block manufactured by the method for manufacturing a piping connection block of the present invention.

FIG. 12 is a perspective view showing a usage state of the piping connection block of FIG. 11;

13 shows a general method of manufacturing the pipe connection block of FIG. 11, and FIGS.

FIG. 14 is a perspective view showing still another example of the structure of the pipe connection block manufactured by the manufacturing method of the present invention.

15 shows another one of the manufacturing methods of the present invention for manufacturing the piping connection block of FIG. 14, and FIGS.

FIG. 16 is a perspective view showing a pipe connection structure using the pipe connection block of FIG. 1;

FIG. 17 is a perspective view showing a pipe connection structure using the pipe connection block of FIG. 6;

FIG. 18 is a perspective view showing a pipe connection structure using the pipe connection block of FIG. 9;

19 is a perspective view showing a pipe connection structure using the pipe connection block of FIG. 11;

20 is a perspective view showing a pipe connection structure using the pipe connection block of FIG.

FIG. 21 is a cross-sectional view showing a blanket module of the fusion reactor.

FIG. 22 is a perspective view showing three-pass piping of the first wall of the blanket module of FIG. 21;

FIG. 23 is a sectional view of the three-pass pipe of FIG. 22;

FIG. 24 is an enlarged perspective view of the three-pass pipe of FIG. 23.

[Explanation of symbols]

 10, 10a, 10a Metal block 11, 11a, 11 'Inlet flow path 11a, 11b Groove 11c hole 12 Flow path 13, 13' Piping connection block 14, 14a, 15 Outlet flow path 16 Piping connection block 19 Half section Circular groove 20 Pipe connection block 21 Semicircular cross section groove 22 Thin-walled pipe 22a Large-diameter part of pipe 22 b Small-diameter part of pipe 22 Seal welding 24a Straight flow path 24b Curved flow path 25 Pipe connection block 28 Passage 29 Flow path 30 Piping connection block 31 Sintered block 32 Semi-circular groove 33 Thin pipe 34 Seal welding

──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. ⁷ Identification code FIG21C 15/22 F16L 58/08 // F16L 58/08 41/02 A B23K 101: 04 (56) References JP-A-4- 15390 (JP, A) JP-A-5-281378 (JP, A) JP-A-60-121202 (JP, A) JP-A-5-57768 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16L 39/00 B23K 20/00 F16L 58/08

Claims (2)

(57) [Claims] 1. A method for manufacturing a pipe connection block.
To prepare two rectangular metal blocks,
Follow the required flow path pattern on the mating surface of the block
To form a groove symmetrically and then into the groove of one metal block
Set thin-walled piping and process the other metal block
Surface on one metal block
And then hot isostatic welding
How to make a piping connection block. 2. In manufacturing a pipe connection block.
To make two metal blocks by sintering SUS powder.
Next, the required passage pattern is placed on the mating surface of the sintered block.
The groove is machined symmetrically along the
Set a thin-walled pipe in the groove of the block, and set the other sintered block.
The processing surface of the block to the processing surface of one sintered block
It is characterized by seal welding and then hot isostatic bonding
How to make a piping connection block.