JP2008039022A - Pipe joint member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint member capable of effectively jointing one group of fluid pipe passages and the other group of pipe passages of piping simultaneously which is integrated as the whole and having two flow passages inside thereof respectively, and capable of achieving simplification of execution, and reduction of the execution cost and the piping space. <P>SOLUTION: The pipe joint member is provided with a cylinder part 18, and a pipe joint body 20 formed in a T shape and having a branch part 19 branched from the cylinder part, and an inside of the pipe joint body is partitioned by a cylinder part partition wall 24 extending to the cylinder axis direction of the cylinder part 18 and a branch part partition wall 23, and thereby, the inside is partitioned into a first flow passage 26 penetrating from an end opening to the other end opening of the cylinder part 18 and connected to one end of a first fluid pipe passage 16 or a second fluid flow pipe passage 17 of the piping 10, a bent second flow passage 21, and a bent third flow passage. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pipe joint member including a pipe joint for joining pipes in a water supply / hot water supply piping system and the like, a header for joining a plurality of pipes at their tips, and the like.

For example, in a hot water type hot water supply system, a pipe that is formed integrally as a whole and includes a two-fluid pipe, a hot water pipe and a steam pipe, for example, a hot water pipe and water in the hot water pipe are heated. It is known that the steam pipes are configured in a pair tube shape, and that the steam pipes and the hot water supply pipes are configured in an internal / external double pipe structure (see, for example, Patent Document 1).
Also, the hot water supply pipe is configured as a double pipe having an inner pipe and an outer pipe, and hot water is flown through the inner pipe and hot air is heated through the outer pipe to heat or keep the hot water in the inner pipe. It is publicly known (see, for example, Patent Document 2).

JP 61-89442 A (FIGS. 2 and 3) Japanese Patent Laying-Open No. 2006-10212 (FIGS. 2 and 3)

  By the way, if it is assumed that pipes having two fluid pipes are connected to each other while being integrated as a whole as described above, the ends of one of the fluid pipes are joined together by a pipe joining member. The ends of one of the fluid pipes are joined together by another pipe joining member, and the joint piping work is extremely troublesome, and there is a problem that a large piping space is required.

  The present invention has been made in order to solve such a problem, and the object of the present invention is to connect pipes having two fluid pipes inside while being integrated as a whole as described above. , Providing a pipe splicing member that can efficiently join one fluid pipe line and another fluid pipe line at the same time at the same time, simplifying construction, reducing construction cost, and narrowing piping space There is to do.

  As described in claim 1, the pipe joint member of the present invention will be described with reference to the reference numerals attached to FIGS. 1 to 5 in order to facilitate understanding of the contents of the invention. In a pipe joining member (8) for joining pipes (10) formed by partitioning into a first fluid pipe (16) and a second fluid pipe (17) with a partition wall (15) continuous in a direction, It has a pipe joint body (20) formed in a T shape having a cylindrical part (18) and a branch part (19) branched from the cylindrical part, and the inside of the pipe joint body is a cylindrical part 818). A cylindrical partition wall (24) extending in the cylinder axis direction, and an opening of the branch section (19) on a vertical plane perpendicular to the cylindrical partition wall from a position facing the branch section (19) of the cylindrical partition wall One end opening of the cylindrical part (18) by partitioning with a branch part partition wall (23) extending in the end direction From the opening end of the branching portion (19) and the first flow passage (26) passing through the other end opening and connected to the end of the first fluid conduit (16) or the second fluid conduit (17). A bent second flow passage (21) communicating with one end of the first fluid pipe (16) or the second fluid pipe (17) through one end opening of the cylindrical portion (18). And communicating with the other end of the first fluid conduit (16) or the second fluid conduit (17) from the opening end of the branch portion (19) to the other end opening of the cylindrical portion (18). It is characterized in that it is divided into a bent third flow passage (22).

  According to the pipe splicing member (8) having such a configuration, the first and the second are independent of each other by the cylindrical partition wall (24) and the branching partition wall (23) while having a T shape integrally formed as a whole. , 3 flow passages (26), (22), (23) are divided into three flow passages, so that the pipes (10) provided with the first and second fluid pipes (16), (17) are connected to each other. It is possible to joint at the same place and at the same time, and it is possible to improve the efficiency of the joining operation.

  As described in claim 2, the pipe joint member of the present invention will be described with reference to the reference numerals attached to FIGS. 6 and 7 for easy understanding of the contents of the invention. A pipe joint that joins a plurality of pipes (10), which are partitioned into a first fluid pipe (16) and a second fluid pipe (17), at the tip thereof by a partition wall (15) continuous in the axial direction. In the member (33), a plurality of pipe splicing components (33A), (33B), (33c) formed in a T shape having a cylindrical portion (34) and a branching portion (35) branched from the cylindrical portion. The inside of each pipe joint component member (33A), (33B), (33c)... Is a cylindrical part partition wall (40) extending in the cylinder axis direction of the cylindrical part (34), and A perpendicular portion of the cylindrical partition wall (40) perpendicular to the cylindrical partition wall (40) from a position facing the branch portion (35) of the cylindrical partition wall. A first flow passage (43) penetrating from one end opening of the cylindrical portion (34) to the other end opening by partitioning with a branching partition wall (36) extending in the direction of the opening end of the branching portion (35) on a plane. ) And the one end of the first fluid pipe (16) or the second fluid pipe (17) communicating from the opening end of the branch part (35) to the one end opening of the cylindrical part (34). The first fluid conduit (16) or the second fluid conduit communicated from the open end of the branch portion (35) to the other end opening of the cylindrical portion (34). Each of the pipe joining components (33A), (33B), (33c),..., Is formed by partitioning into a bent third flow passage (38) connected to the other end of (17).・ The cylindrical parts (34) are in a state where the ends of the cylindrical part partition walls (40) are butted together. The connected in series in the cylinder axis direction, the cylindrical portion end of the cylindrical axial end of the tube seaming components are those characterized in that they are closed by blind plug portion (44).

  According to the pipe joining member having such a configuration, the first, second, and third flow passages (44), (44), which are integrated as a whole but are independent by the cylindrical partition wall (40) and the branch partition wall (36). 37) and (38) are partitioned into three flow passages, so that the plurality of pipes (10) including the first and second fluid pipes (16) and (17) are arranged at the same place at the ends thereof. At the same time, seaming can be performed, and the efficiency of the seaming work can be improved.

  The pipe splicing member of the present invention will be described with reference to the reference numerals attached to FIGS. 8 to 14 in order to facilitate understanding of the contents of the invention as described in claim 3. Three distributions of the first, second, and third flow passages (44), (37), and (38) in which the pipe splicing member of the described invention is independent by the cylindrical partition wall (40) and the branching partition wall (36). In contrast to the configuration provided with the path, the inside of the cylindrical portion (34) of each pipe joining component (33A), (33B), (33c). By partitioning with a wall (45), it is divided into a first flow path (46) and a second flow path (47), and the interior of each branch part (35) is each branch of the cylindrical part partition wall (45). In the same plane as the cylindrical partition wall (45) extending from the location facing the section (35) toward the opening end of each branch section (35) By partitioning with a certain partition wall (48), it communicates with the first flow passage (46) and is connected to one end of the first fluid pipe (16) or the second fluid pipe (17). A fourth flow passage (communication to the third flow passage (49) and the second flow passage (47) and connected to the other end of the first fluid pipe (16) or the second fluid pipe (17). 50), except that it is formed in the same manner as that of the pipe splicing member according to the second aspect of the present invention.

  According to the present invention, the pipes having the first and second fluid pipes can be spliced together at the same place and at the same time. Therefore, the simplification of the splicing work, the construction cost can be reduced, and the piping space can be narrowed. This is advantageous.

  A preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a circulating hot water supply system showing an example of use of a pipe splicing member according to an embodiment of the present invention, and shows a state when all of the taps are in a closed state, and FIG. 2 is a circulating type of FIG. FIG. 3A to FIG. 3F are views showing a state when one of the hot water taps is opened in the hot water supply system, and FIGS. 3A to 3F are hot water supply / return hot water having various cross-sectional shapes used in the circulating hot water supply system of FIG. 4 is a cross-sectional view showing a connection structure between a terminal end of a hot water supply / return hot water common pipe used in the circulating hot water supply system of FIG. 1 and a hot water tap.

  As shown in FIG. 1, a circulating hot water supply system 1 in which a pipe splicing member according to the present invention is used includes a hot water storage tank 2 for storing hot water for hot water supply, and a plurality of taps and shower heads at the end of the hot water supply piping system. Hot water tap 3 (first, second, and third hot water taps 3A, 3B, and 3C in the illustrated example), a hot water supply single pipe 4 and a water supply pipe 5 each connected to the hot water storage tank 2, and a water supply pipe 5 The hot water single pipe 7 whose tip is connected to the first bypass pipe 6 branched from the pipe, the individual ends of the hot water single pipe 4 and the single hot water pipe 7, and the taps 3 according to the present invention. Piping 10 for hot water supply / returning hot water connected via a member 8 (first and second pipe joining members 8A and 8B in the illustrated example) (first, second, third and fourth pipes 10A and 10B in the illustrated example) , 10C, 10D) and a circulation pump 11 disposed in the return hot water single pipe 7 That.

  A hot water supply pipe 5 is piped between the lower part of the hot water storage tank 2 and a water supply source such as a water supply, and a single hot water supply pipe 4 is piped between the upper part of the hot water storage tank 2 and the first pipe joining member 8A. The single pipe 7 is piped between the first bypass pipe 6 and the first pipe joining member 8A. A first check valve 12 for preventing the backflow of hot water into the hot water storage tank 2 is provided in the vicinity of the connecting portion of the hot water supply single pipe 4 with the hot water storage tank 2. The first bypass pipe 6 is provided with a second check valve 13 that prevents back flow of hot water into the return hot water single pipe 7.

  As shown in FIGS. 3A to 3F, the pipes 10 (10A, 10B, 10C, 10D) shared with each hot water supply / returning hot water are first divided by a partition wall 15 in which the inside of the pipe is continuous in the pipe axis direction. The fluid pipe line 16 and the second fluid pipe line 17 are partitioned, and the first fluid pipe line 16 is used for hot water feeding and the second fluid pipe line 17 is used for hot water feeding.

  FIGS. 3A to 3F illustrate pipes 10 having various cross-sectional shapes for sharing hot water and returning hot water. The piping 10 shown to Fig.3 (a) forms the partition wall 15 which partitions off the inside of the piping 10 with a circular cross section in the cross-sectional shape extended straightly in a diameter direction. The piping 10 shown in FIG.3 (b) forms the partition wall 15 which partitions off the inside of the piping 10 with a circular cross section in the S direction in the diameter direction. In the pipe 10 shown in FIG. 3C, the partition wall 15 for partitioning the inside of the pipe 10 having a circular cross section is formed in a concentric circular shape. The pipe 10 shown in FIG. 3 (d) has a partition wall 15 that partitions the inside of the pipe, and the cross-sectional shape of the pipe 10 is a spectacle shape in which both the first fluid pipe line 16 and the second fluid pipe line 17 are circular in cross section. It is formed into a shape. A pipe 10 shown in FIG. 3E forms a partition wall 15 in which both the first fluid pipe 16 and the second fluid pipe 17 in the pipe 10 having a circular cross section have a circular cross section. In the pipe 10 shown in FIG. 3F, a partition wall 15 that partitions the inside of the pipe 10 having a circular cross section is formed in a circular shape inscribed in a part of the inner periphery of the pipe 10.

The pipe joint member (pipe joint) 8 according to the present invention has a pipe joint body 20 formed in a T shape having a cylindrical part 18 and a branch part 19 branched from the cylindrical part 18. The inside of the pipe joining main body 20 is orthogonal to the cylindrical partition wall 24 from a portion facing the cylindrical portion partition wall 24 extending in the cylinder axis direction of the cylindrical portion 18 and the branch portion 19 of the cylindrical partition wall 24. A first flow passage 26 that penetrates straight from one end opening of the cylindrical portion 18 to the other end opening by partitioning with a branching partition wall 23 that extends in the direction of the opening end of the branching portion 19 on a vertical plane, and the branching portion 19. A bent second flow passage 21 communicating from the opening end of the cylindrical portion 18 to one end opening portion of the cylindrical portion 18, and a bent third flow passage 22 communicating from the opening end of the branch portion 19 to the other end opening portion of the cylindrical portion 18. It forms a partition.
As will be described later, the pipes 10 are connected to the ends of the partition wall 15 and the ends of the cylinder partition wall 24 at the both ends of the cylindrical part 18 of the pipe joint member 8 and the opening of the branch part 19. And the end of the branching partition wall 23 are connected to each other so as to join each other. For this reason, each cross-sectional shape of the cylindrical part partition wall 24 of the cylindrical part 18 and the branch part partition wall 23 of the branch part 19 is the cross-sectional shape of the partition wall 15 of the pipe 10 connected to the cylindrical part 18 and the branch part 19. It is formed in the cross-sectional shape according to.

In the hot water supply circulation pipe, the end of the single hot water supply pipe 4 is connected to the second flow passage 21 of the first pipe joint member 8A, and the end of the single hot water return pipe 7 is the third flow passage of the pipe joint member 8A. 22 is connected.
The first and second flow passages 26 and 21 of the first pipe joining member 8A and the hot water inlet of the first hot water tap 3A are connected by a first pipe 10A.
At that time, the end of the first pipe 10A is located at one end opening of the cylindrical portion 18 of the first pipe joining member 8A at the end of the partition wall 15 in the pipe 10A and the same cross-sectional shape as the partition wall 15. The cylindrical part partition wall 24 is inserted so that the end part of the cylindrical part partition wall 24 is in abutted state, and is joined together by heat fusion, electric fusion, or adhesive means. Thereby, the tip of the first fluid pipe 16 of the first pipe 10A is in the second flow passage 21 of the first pipe joint member 8A, and the tip of the second fluid pipe 17 of the pipe 10A is the first pipe. They are connected so as to communicate with the first flow passages 26 of the joining member 8A.
As shown in FIG. 4, the first ends of the first fluid line 16 and the second fluid line 17 of the first pipe 10 </ b> A are arranged so as to face the inside of the hot water inlet 27 of the first hot water tap 3 </ b> A. The hot water tap 3 </ b> A is connected to the hot water tap 3 </ b> A via the tubular pipe joining member 28, so that when the hot water tap 3 </ b> A is closed, hot water from the end of the first fluid pipe 16 is always in the hot water inlet 27. The end of the fluid pipe 17 is turned to circulate to the inside of the hot water inlet 27.

  As shown in FIG. 1, the first pipe joining member 8A, the second hot water tap 3B, and the third hot water tap 3C are connected to the second, third, and fourth pipes via the second pipe seaming member 8B. 10B, 10C, and 10D are connected. That is, the first pipe joining member 8A and the second pipe joining member 8B are connected by the second pipe 10B. At this time, the tip of the second pipe 10B is connected to the first pipe joining member. The end of the partition wall 15 in the pipe 10B and the end of the cylindrical partition wall 24 having the same cross-sectional shape as the partition wall 15 are in contact with the other end opening of the cylindrical portion 18 of 8A. The end of the second pipe 10B is inserted into the opening end of the branch part 19 of the second pipe joint member 8B, and the end of the partition wall 15 in the pipe 10B and the partition wall 15 in the branch part 19 are connected. They are inserted so that the end portions of the branching partition walls 23 having the same cross-sectional shape are in abutted state, and are joined together by heat fusion, electric fusion, or adhesive means. As a result, the first flow passage 26 of the first pipe joint member 8A and the second flow passage 21 of the second pipe joint member 8B are the first fluid pipe line 16 of the second pipe 10B, and the first The third flow passage 22 of the pipe joint member 8A and the third flow passage 22 of the second pipe joint member 8B are connected to communicate with each other through the second fluid pipe line 17 of the second pipe 10B.

When connecting the second hot water tap 3B and the second pipe joint member 8B, the tip of the third pipe 10C is connected to one end opening of the cylindrical portion 18 of the second pipe joint member 8B. 10C is inserted so that the end of the partition wall 15 in 10C and the end of the cylindrical partition wall 24 having the same cross-sectional shape as the partition wall 15 are in contact with each other by heat fusion, electric fusion or bonding means. Join together. As a result, the tip of the first fluid conduit 16 of the third pipe 10C is in the first flow passage 21 of the second pipe joint member 8B, and the tip of the second fluid conduit 17 is the second pipe joint member 8B. The first flow passages 26 are connected to communicate with each other.
Then, each end of the first fluid pipe line 16 and the second fluid pipe line 17 of the third pipe 10C is connected to the second hot water tap 3B so as to face the inside of the hot water inlet 27 of the second hot water tap 3B. Thus, as in the case of the first hot water tap 3A shown in FIG. 4, the second hot water tap 3B is always closed from the end of the first fluid pipe line 16 in the hot water inlet 27. The hot water is turned to the end of the second fluid conduit 17 and circulates to the inside of the hot water inlet 27.

When connecting the third hot water tap 3C and the second pipe joint member 8B, the tip of the fourth pipe 10D is connected to the other end opening of the cylindrical portion 18 of the second pipe joint member 8B. The end of the partition wall 15 in 10D and the end of the cylindrical partition wall 24 having the same cross-sectional shape as the partition wall 15 in the cylindrical portion 18 are inserted so as to be in contact with each other, heat fusion, electric fusion Alternatively, they are joined together by an adhesive means. As a result, the tip of the first fluid pipe 16 of the fourth pipe 10D is in the first flow passage 26 of the second pipe joint member 8B, and the tip of the second fluid pipe 17 is the second pipe joint member 8B. The third flow passages 22 are connected to communicate with each other.
Then, each end of the first fluid pipe 16 and the second fluid pipe 17 of the fourth pipe 10D is connected to the third hot water tap 3C so as to face the inside of the hot water inlet 27 of the third hot water tap 3C. Thus, as in the case of the first hot-water tap 3A shown in FIG. 4, the hot water from the end of the first fluid conduit 16 is always within the hot-water inlet 27 when the third hot-water tap 3C is closed. Is turned to the end of the second fluid pipe 17 and circulates to the inside of the hot water inlet 27.

  In this way, the hot water supply pipe and the hot water return pipe are installed at the same location by piping the hot water supply / return water common pipes 10A to 10D in the hot water supply circulation pipe connecting the plurality of taps 3A, 3B, 3C. At the same time, piping can be performed. Further, by using the pipe joining members 8A and 8B, the hot water supply single pipe 4 and the return hot water single pipe 7 and the hot water supply / return water common use pipe 10 are joined together, and the hot water supply / return hot water use common pipes 10 are connected to each other. The jointing work is efficiently performed and the workability is excellent.

A switching unit 29 such as a three-way valve for switching the direction of hot water flow is provided between the second bypass pipe 14 branched from the single hot water supply pipe 4 and the intermediate portion of the single hot water return pipe 7.
When all of the outlet taps 3A, 3B, 3C are in the closed state by the switching unit 29, as shown in FIG. 1, hot water is supplied from the hot water storage tank 2 to the first check valve 12 → the single hot water supply pipe 4 → the first pipe. The second flow passage 21 of the joining member 8A → the first fluid pipe 16 of the first pipe 10A → the hot water inlet 27 of the first tap tap 3A → the second fluid pipe 17 of the first pipe 10A → the second. The first flow passage 26 of the first pipe joint member 8A → the first fluid pipe 16 of the second pipe 10B → the second flow passage 21 of the second pipe joint member 8B → the first of the third pipe 10C. Fluid pipe line 16 → Hot water inlet 27 of second outlet tap 3B → Second fluid pipe line 17 of third pipe 10C → First flow path 26 of second pipe joining member 8B → Fourth pipe 10D First fluid pipe 16 → third hot water inlet 27 of third tap 3C → second fluid pipe 17 of fourth pipe 10D → second pipe joint The third flow passage 22 of the member 8B → the second fluid conduit 17 of the second pipe 10B → the third flow passage 22 of the first pipe joining member 8A → the single hot water return pipe 7 → the circulation pump 11 → first The flow is switched from the bypass pipe 6 to the second check valve 13 to the water supply pipe 5 so as to return to the hot water storage tank 2.

  Then, the first of the third pipe 10C facing the inlet 27 of the second hot-water tap 3B by opening one of the hot-water taps 3A, 3B, 3C, for example, opening the second hot-water tap 3B. At the same time as the hot water from the fluid pipe 16 is discharged, the hot water is supplied from the single hot water supply pipe 4 to the single hot water return pipe 7 via the second bypass pipe 14 as shown in FIG. The third flow passage 22 of the first pipe joining member 8A → the second fluid pipe line 17 of the second pipe 10B → the third flow passage 22 of the second pipe joint member 8B → the fourth pipe 10D. Second fluid conduit 17 → third inlet port 27 of third outlet tap 3C → first fluid conduit 16 of fourth pipe 10D → first fluid passage 26 of second pipe joining member 8B → third The second fluid pipe 17 of the pipe 10C of the second pipe → the inlet 27 of the second hot water tap 3B. That is, when the second hot water tap 3B is opened, hot water is supplied from both the first fluid pipe 16 and the first fluid pipe 17 of the third pipe 10C by the switching of the switching portion 29. Sent to.

  Next, the operation of the circulating hot water supply system 1 configured as described above will be described.

As shown in FIG. 1, when all of the first, second, and third hot-water taps 3A, 3B, and 3C are closed, the circulation pump 11 is operated at a low speed or intermittently to return to the second bypass pipe 14 and return. The three-way valve as the switching unit 29 is switched so that the communication state with the hot water single pipe 7 is blocked. Accordingly, the hot water storage tank 2 → the first check valve 12 → the single hot water supply pipe 4 → the second flow passage 21 of the first pipe joining member 8B → the first fluid pipe 16 of the first pipe 10A → the first. The hot water inlet 27 of the hot water tap 3A → the second fluid line 17 of the first pipe 10A → the first flow path 26 of the first pipe joining member 8A → the first fluid line 16 of the second pipe 10B → the second flow passage 21 of the second pipe joining member 8B → the first fluid pipe 16 of the third pipe 10C → the hot water inlet 27 of the second outlet tap 3B → the second fluid of the third pipe 10C Pipe 17 → first flow passage 26 of the second pipe joining member 8B → first fluid pipe 16 of the fourth pipe 10D → hot water inlet 27 of the third outlet tap 3C → of the fourth pipe 10D 2nd fluid pipe line 17 → 3rd flow path 22 of 2nd pipe joint member 8B → 2nd fluid pipe line 17 of 2nd piping 10B → 1st pipe joint The third flow passage 22 of the member 8A → the single hot water return pipe 7 → the circulation pump 11 → the first bypass pipe 6 → the second check valve 13 → the water supply pipe 5 flows back to the hot water storage tank 2 and the hot water storage tank 2 To the first check valve 12 and flow in the same order as described above, and circulate repeatedly.
Thus, the temperature of the hot water in each pipe can be maintained by circulating the hot water in the hot water storage tank 2 little by little.

Now, of the first, second, and third outlet taps 3A, 3B, and 3C, for example, when the second outlet tap 3B is opened, the electrical signal generated from the outlet tap 3B or the return hot water single pipe 7 The three-way valve, which is the switching unit 29, is switched so that hot water flows from the second bypass pipe 14 to the return hot water single pipe 7 as shown in FIG. At this time, the operation of the circulation pump 11 is stopped. At that time, when the second hot-water tap 3B is opened, the first of the third pipe 10C facing the inlet 27 of the second hot-water tap 3B is caused by the internal pressure (tap pressure) in the hot water storage tank 2. Hot water from the fluid line 16 is immediately discharged, and at the same time, hot water is supplied from the single hot water supply pipe 4 to the single hot water return pipe 7 via the second bypass pipe 14 in accordance with the switching of the three-way valve as the switching unit 29. The third flow passage 22 of the first pipe joining member 8A → the second fluid pipe line 17 of the second pipe 10B → the third flow passage 22 of the second pipe joint member 8B → the fourth pipe 10D. Second fluid conduit 17 → third inlet port 27 of third outlet tap 3C → first fluid conduit 16 of fourth pipe 10D → first fluid passage 26 of second pipe joining member 8B → third The first fluid pipe 17C of the third pipe 10C flows from the second fluid pipe line 17 to the inlet 27 of the second hot water tap 3B. 16 is discharged along with the hot water from the.
As described above, when the second hot-water tap 3B is opened, hot water is discharged immediately, so that no waste water is generated. Further, hot water is sent from both the first fluid pipe line 16 and the first fluid pipe line 17 of the third pipe 10C to the second hot water tap 3B which is opened by switching the three-way valve which is the switching unit 29. Therefore, the fluctuation | variation of the fall of the discharge flow rate from the 2nd tap tap 3B can be reduced.

  FIG. 5 shows a configuration of a circulating hot water supply system 1 according to another embodiment. In this embodiment, the circulating hot water supply system 1 of the above embodiment returns the return hot water to the lower part in the hot water storage tank 2 by connecting the tip of the return hot water single pipe 7 to the water supply pipe 5 via the first bypass pipe 6. On the other hand, the point which connected the front-end | tip of the return hot water single piping 7 to the middle part of the hot water supply single piping 4 differs from the said Example. In this case, a reheating part 31 such as a heat exchanger or a heat pump is provided between the circulating pump 11 on the return hot water single pipe 7 and the connection part of the hot water supply single pipe 4 to reheat the return hot water. Then, it is circulated back to the hot water supply single pipe 4 through the check valve 32. Since the other structure is the same as that of the circulating hot water supply system 1 of the above embodiment, the same elements and the same reference numerals are assigned to the same members, and the duplicate description thereof is omitted.

  FIG. 6 shows a circulating hot water supply system 1 in which a pipe joining member 33 according to another embodiment of the present invention is used. The pipe joining member 33 of this embodiment is similar to the pipe 10 of the above-described embodiment, and each of the plurality of pipes 10 having an interior partitioned into a first fluid pipe line 16 and a second fluid pipe line 17 by a partition wall 15. This is a header that joins (first, second, and third pipes 10A, 10B, and 10C) at their tips.

The pipe seaming member 33 of this embodiment includes a plurality of first, second, and third pipe seaming components 33A having the same cross-sectional shape as the T-shaped pipe seaming member 8 shown in FIGS. 33B and 33C are integrally formed in a shape connected in series.
That is, each of the pipe seaming members 33A, 33B, 33C is formed in a T shape having a cylindrical portion 34 and a branching portion 35 branched from the cylindrical portion 34. The inside of each pipe joining component 33A, 33B, 33C is formed from the cylindrical part partition wall 40 extending in the cylinder axis direction of the cylindrical part 34 and the cylindrical part partition from a position facing the branch part 35 of the cylindrical part partition wall 40. A first flow passage 43 penetrating from one end opening of the cylindrical portion 34 to the other end opening by partitioning with a branching partition wall 36 extending in the direction of the opening end of the branching portion 35 on a vertical plane orthogonal to the wall 40; A bent second flow passage 37 that communicates from the opening end of the branch portion 35 to one end opening portion of the cylindrical portion 34, and a bent third flow passage that communicates from the opening end of the branch portion 35 to the other end opening portion of the cylindrical portion 34. A compartment is formed with the flow passage 38. And each pipe joint component 33A, 33B, 33C connects the cylindrical parts 34 in series in the cylinder axial direction so that the ends of the cylindrical part partition walls 40 are in abutted state, The end of the cylindrical portion 34 of the pipe joining component 33C is closed by a blind plug portion 44.

  In the hot water supply circulation piping, the second flow passage 37 of the first pipe seaming component 33A at the tip in the cylinder axis direction of the pipe seaming member 33 and the upper part of the hot water storage tank 2 are connected by the hot water feeding single pipe 4; The first flow passage 43 of the pipe joining component member 33 </ b> A and the intermediate portion of the single hot water supply pipe 4 are connected by the single hot water return pipe 7. A circulation pump 11 is provided in the single hot water return pipe 7, and a switching unit 29 such as a three-way valve is provided between the second bypass pipe 14 branched from the single hot water supply pipe 4 and the intermediate portion of the single hot water return pipe 7. A first check valve 12 for preventing the backflow of hot water into the hot water storage tank 2 is provided in the vicinity of the connection portion of the single hot water supply pipe 4 with the hot water storage tank 2, and for circulation on the single hot water return pipe 7. The reheating part 31 by a heat exchanger, a heat pump, or the like is provided between the pump 11 and the connection part of the hot water supply single pipe 4 as in the case of the circulating hot water supply system 1 shown in FIG.

The branch portions 35 of the first, second, and third pipe joint members 33A, 33B, and 33C and the first to third outlet taps 3A, 3B, and 3C are the same as those used in the above embodiments. The first, second, and third pipes 10A, 10B, and 10C, which are the same as the hot water / return hot water pipe 10, are connected in series.
That is, the tips of the first, second, and third pipes 10A, 10B, and 10C are respectively connected to the opening ends of the branch portions 35 of the first, second, and third pipe joint members 33A, 33B, and 33C. The end portions of the partition walls 15 in 10B and 10C and the end portions of the branch portion partition walls 36 having the same cross-sectional shape as the partition walls 15 in each branch portion 35 are inserted into each other. They are joined together by heat fusion, electric fusion or adhesive means. As a result, the tips of the first fluid pipes 16 of the first, second, and third pipes 10A, 10B, and 10C are respectively connected to the second flow passages 37 of the first, second, and third pipe joint members 33A, 33B, and 33C. In addition, the tip of each second fluid pipe line 17 is connected so as to communicate with each third flow passage 38 of the pipe joining component 33A, 33B, 33C.
The ends of the first fluid lines 16 and the ends of the second fluid lines 17 of the first, second, and third pipes 10A, 10B, and 10C are the hot water flows of the first, second, and third outlet taps 3A. It connects with each 1st, 2nd, 3rd hot-water tap 3A, 3B, 3C so that it may each face the inside of the inlet 27 (refer FIG. 4), Thereby, as shown in FIG. 4, each hot-water tap 3A, 3B, When 3C is closed, the hot water from the end of the first fluid pipe 16 is turned to the end of the second fluid pipe 17 in each hot water inlet 27 and circulates into the hot water inlet 27. .

  Next, operation | movement of the circulation type hot-water supply system 1 of the Example shown in FIG. 6 is demonstrated.

  As shown in FIG. 6, when all of the first, second, and third hot water taps 3A, 3B, and 3C are in the closed state, the circulation pump 11 is operated at a low speed or intermittently to return to the second bypass pipe 14 and return. The three-way valve as the switching unit 29 is switched so that the communication state with the hot water single pipe 7 is blocked. Accordingly, the hot water storage tank 2 → the first check valve 12 → the single hot water supply pipe 4 → the second flow passage 37 of the first pipe joint component 33A → the first fluid pipe 16 of the first pipe 10A → the first. The hot water inlet 27 of the first hot water tap 3A → the second fluid pipe 17 of the first pipe 10A → the third flow passage 38 of the first pipe seaming component 33A → the second pipe seaming member 33B Second flow passage 37 → first fluid pipe 16 of second pipe 10B → hot water inlet 27 of second tap tap 3B → second fluid pipe 17 of second pipe 10B → second pipe splicing The third flow passage 38 of the component 33B → the second flow passage 37 of the third pipe joining component 33C → the first fluid pipe 16 of the third pipe 10C → the hot water inlet 27 of the third outlet tap 3C. → the second fluid line 17 of the third pipe 10C → the third flow path 38 of the third pipe joining component 33C → the third and second 1 each flow passage 43 → return hot water single pipe 7 → switching section 29 → circulation pump 11 → reheating section 31 → return valve 32 → returning hot water supply single pipe 4 and the first reverse from the hot water storage tank 2 It flows through the stop valve 12 in the same order as described above, and it is circulated repeatedly. Thus, the temperature of the hot water in each pipe can be maintained by circulating the hot water in the hot water storage tank 2 little by little.

Now, of the first, second, and third outlet taps 3A, 3B, and 3C, for example, when the second outlet tap 3B is opened, the electrical signal generated from the outlet tap 3B or the return hot water single pipe 7 The three-way valve that is the switching unit 29 is switched so that hot water flows from the second bypass pipe 14 to the return hot water single pipe 7 as shown in FIG. At this time, the operation of the circulation pump 11 is stopped. When the second hot-water tap 3B is opened, the first of the second pipe 10B facing the inlet 27 of the second hot-water tap 3B is caused by the internal pressure (water pressure) in the hot water storage tank 2. Hot water from the fluid line 16 is immediately discharged, and at the same time, hot water is supplied from the single hot water supply pipe 4 to the single hot water return pipe 7 via the second bypass pipe 14 in accordance with the switching of the three-way valve as the switching unit 29. The first flow passage 43 of each of the first, second, and third pipe jointing members 33A, 33B, and 33C → the third flow passage 38 of the third pipe jointing member 33C → the first of the third pipe 10C. 2 fluid conduit 17 → hot water inlet 27 of the third outlet tap 3C → first fluid conduit 16 of the third pipe 10C → second flow passage 37 of the third pipe joining component 33C → second The third flow passage 38 of the pipe joining component 33B → the return hot water flow passage 17 of the second pipe 10B → the second hot water discharge. 3B flows into the inlet 27 and discharges with hot water from the first fluid conduit 16 of the second pipe 10B.
As described above, when the second hot-water tap 3B is opened, hot water is discharged immediately, so that no waste water is generated. Further, hot water is sent from both the first fluid pipe line 16 and the first fluid pipe line 17 of the third pipe 10C to the second hot water tap 3B which is opened by switching the three-way valve which is the switching unit 29. Therefore, the fluctuation | variation of the fall of the discharge flow rate from the 2nd tap tap 3B can be reduced.

In the embodiment shown in FIG. 6, a plurality of taps 3A, 3B, 3C are connected in series to the pipe joining member 33 via the first, second, and third pipes 10A, 10B, 10C. As shown in FIG. 5, a plurality of taps 3A, 3B, 3C can be connected to the pipe joining member 33 in parallel via the first, second, and third pipes 10A, 10B, 10C. However, in this case, as the pipe joining member 33, a parallel specification type having a shape having an internal flow path that allows a plurality of taps 3A, 3B, 3C to be connected in parallel is used.
That is, each of the pipe joining components 33A, 33B, and 33C has a T shape having each cylindrical portion 34 (34A, 34B, 34C) and each branch portion 35 (35A, 35B, 35C) branched from each cylindrical portion 34. To form. The inside of each cylindrical portion 34 of each pipe joining component 33A, 33B, 33C is partitioned into a first flow passage 46 and a second flow passage 47 by partitioning with a cylindrical portion partition wall 45 extending in the tube axis direction. (See FIG. 14). The inside of each branch part 35A, 35B, 35C is a cylindrical part partition wall extending from the portion facing the branch part 35A, 35B, 35C of the cylindrical part partition wall 45 toward the opening end of each branch part 35A, 35B, 35C. 45 is divided into a third flow passage 49 that communicates with the first flow passage 46 and a fourth flow passage 50 that communicates with the second flow passage 47. (See FIG. 14). And each pipe joint constituent member 33A, 33B, 33C connects each cylindrical part 34A, 34B, 34C in series in the direction of a cylinder axis so that the end parts of cylindrical part partition wall 45 may be in abutting state, The end of the cylindrical portion 34C of the end pipe joint component 33C is closed by a blind plug portion 44.

The end of the single hot water supply pipe 4 is at the tip of the first flow passage 46 of the cylindrical portion 34A of the first pipe joining member 33A, and the end of the single hot water return pipe 7 is the second flow passage 47 of the cylindrical portion 34A. Each is connected to the tip.
The branch portions 35A, 35B, and 35C of the first, second, and third pipe joint members 33A, 33B, and 33C and the first to third hot water taps 3A, 3B, and 3C are used in each of the above embodiments. The first, second, and third pipes 10A, 10B, and 10C, which are the same as the pipe 10 shared with the hot water supply / return hot water, are connected in parallel.
That is, the tips of the first, second, and third pipes 10A, 10B, and 10C are respectively connected to the opening ends of the branch portions 35 of the first, second, and third pipe joint members 33A, 33B, and 33C. The end of the partition wall 15 in 10B and 10C and the end of the branch section partition wall 48 having the same cross-sectional shape as the partition wall 15 in each of the branch sections 35A, 35B and 35C are in a butted state. Each is inserted and joined together by heat fusion, electric fusion or adhesive means. As a result, the tips of the first fluid pipes 16 of the first, second, and third pipes 10A, 10B, and 10C are connected to the branch portions 35A and 35B of the first, second, and third pipe joint members 33A, 33B, and 33C. , 35C and the third flow passage 49 are connected so that the tips of the second fluid conduits 17 communicate with the fourth flow passages 50 in the branch portions 35, respectively.

  10 to 14 show detailed specific structural examples of the first, second, and third pipe jointing members 33A, 33B, and 33C. In each figure, each pipe joining component 33A, 33B, 33C is inserted into the inner periphery of one end opening of the cylindrical portion 34 through the seal ring 52 (see FIG. 10) such as an O-ring. It is formed in a shape that can be connected. A cylindrical partition wall 45 in each cylindrical portion 34 is provided so as to extend from the inside of one end opening of the cylindrical portion 34 to the lower position inside the branch portion 35. When one end opening of the other pipe seaming component 33B is inserted into and connected to the other end opening of one pipe seaming member 33A, the cylindrical partition wall of the one pipe seaming member 33A One end portion on the one end opening side of the cylindrical partition wall 45 in the one end opening portion of the other pipe splicing component 33B is joined to the other end portion on the other end opening portion side of 45 in a butted manner. It is composed. In the joining means, a projection (tenon) 53 is provided at one end of each cylindrical partition wall 45 (see FIG. 12), and a groove (tenon groove) 54 into which the projection 53 is inserted is provided at the other end. (See FIG. 13). In order to be able to butt and join the cylindrical partition walls 45 and 45 reliably and easily when connecting the pipe joint members 33A and 33B, the one end opening of each pipe joint member 33A, 33B and 33C is provided. An alignment protrusion 55 is provided on a part of the outer periphery (see FIGS. 11 and 12), and an alignment groove 56 in which the alignment protrusion 55 is fitted is provided on a part of the inner periphery of the other end opening (see FIGS. 11 and 12). 13). Therefore, when the one end opening of the other pipe joint constituent member 33B is inserted into the other end opening of one pipe joint constituent member 33A, the alignment protrusion 55 is fitted in the alignment groove 56. By inserting, the cylindrical partition walls 45 and 45 can be butt-joined reliably through the fitting of the projection 53 and the groove 54. The abutting structure between the ends of the cylindrical partition walls 45 and 45 can be similarly applied to the butting between the ends of the cylindrical partition walls 40 and 40 in the embodiment shown in FIG. A blind plug portion 44 is inserted into the other end opening portion of the cylindrical portion 34 of the end pipe joint component 33C to close it.

  On the other hand, in each branch part 35 of the pipe joint component members 33A, 33B, 33C, the branch part partition wall 48 is formed in an S-shaped cross section in accordance with the cross sectional shape of the partition wall 15 of the pipe 10 in FIG. is doing. When the tip of the pipe 10 is inserted into the branch portion 35, the end portion of the partition wall 15 in the pipe 10 is joined to the end portion of the branch portion partition wall 48 in a butted manner. As shown in FIG. 14, the joining means is provided with a projection (tenon) 57 at the end of the branch partition wall 48 and a groove (tenon groove) into which the projection 57 is inserted into the end of the partition wall 15 of the pipe 10. 58). The butt joining means of the end of the partition wall 15 of the pipe 10 and the end of the branch partition wall 48 is the same as the end of the partition wall 15 of the pipe 10 of the embodiment shown in FIGS. The same applies to the butt joint with the end of the wall 36.

  In the embodiment shown in FIG. 8, as in the case of the embodiment shown in FIG. 1, as shown in FIG. 4, the first fluid pipes 16 of the first, second, and third pipes 10A, 10B, and 10C are shown. The first, second and third outlet taps so that the ends of the second fluid pipes 17 face the insides of the first, second and third outlet taps 3A, 3B and 3C. 3A, 3B, 3C are connected to each other via the tubular fitting 28, so that when the taps 3A, 3B, 3C are closed, hot water from the end of the first fluid pipe 16 is always in the hot water inlet 27. The second fluid pipe 17 is circulated to the end of the hot water inlet 27 after being turned to the end.

  Further, the circulation pump 11 is provided in the single hot water return pipe 7, and a switching unit such as a three-way switching valve is provided between the bypass pipe 26 branched from the single hot water supply pipe 4 and the intermediate portion of the single hot water return pipe 7. 29, a first check valve 12 for preventing the backflow of hot water into the hot water storage tank 2 is provided in the vicinity of the connection portion of the hot water supply single pipe 4 with the hot water storage tank 2, and for circulating the return hot water single pipe 7 The reheating unit 13 such as a heat exchanger or a heat pump is provided between the pump 11 and the connection part of the hot water supply single pipe 4 as in the case of the circulating hot water supply system 1 shown in FIG.

  Next, the operation of the circulating hot water supply system 1 shown in FIG. 8 will be described.

  As shown in FIG. 8, when all of the first, second, and third hot water taps 3A, 3B, and 3C are in the closed state, the circulation pump 11 is operated at low speed or intermittently, and the bypass pipe 26 and the hot water alone are operated. The three-way switching valve that is the switching unit 29 is switched so that the communication state with the pipe 7 is blocked. Accordingly, the hot water storage tank 2 → the first check valve 12 → the single hot water supply pipe 4 → the first flow passages 46 of the first, second, and third cylindrical portions 34A, 34B, and 34C of the pipe joining member 33 → the first. , 2, 3 branch passages 35A, 35B, 35C, third flow passages 49 → first, second, third pipes 10A, 10B, 10C, first fluid pipes 16 → first, second, third tapping water Each of the hot water inlets 27 of the plugs 3A, 3B, 3C → the second fluid conduits 17 of the first, second, third pipes 10A, 10B, 10C → the first, second, third branch portions 35A, 35B, 35C Each fourth flow passage 50 → second flow passage 47 of each of the first, second, and third cylindrical portions 34A, 34B, 34C → return water single pipe 7 → switching portion 29 → circulation pump 11 → reheating portion 13 → first 2 Check valve 14 → Returns to the hot water supply single pipe 4 and flows from the hot water storage tank 2 through the first check valve 12 in the same order as described above. Circulated by repeating it. Thus, the temperature of the hot water in each pipe can be maintained by circulating the hot water in the hot water storage tank 2 little by little.

Now, of the first, second, and third outlet taps 3A, 3B, and 3C, for example, when the second outlet tap 3B is opened, the electrical signal generated from the outlet tap 3B or the return hot water single pipe 7 As shown in FIG. 9, the three-way switching valve, which is the switching unit 29, causes hot water to flow from the hot water supply single pipe 4 to the return hot water single pipe 7 via the bypass pipe 26, as shown in FIG. 9. Is also switched to flow. At this time, the operation of the circulation pump 11 is stopped. When the second hot-water tap 3B is opened, the first of the second pipe 10B facing the inlet 27 of the second hot-water tap 3B is caused by the internal pressure (water pressure) in the hot water storage tank 2. Hot water from the fluid line 16 is immediately discharged, and at the same time, hot water flows from the single hot water supply pipe 4 to the single hot water return pipe 7 via the bypass pipe 26 in accordance with the switching of the three-way switching valve as the switching unit 29. The second flow passage 47 of the pipe joining member 33 → the fourth flow passage 50 of the second branch portion 35B → the second fluid pipe 17 of the second pipe 10B → to the inlet 27 of the second outlet tap 3B. It flows and is discharged together with hot water from the first fluid line 16 of the second pipe 10B.
As described above, when the second hot-water tap 3B is opened, hot water is discharged immediately, so that no waste water is generated. In addition, hot water is sent from both the first fluid line 16 and the first fluid line 17 of the second pipe 10B to the second hot water tap 3B that is opened by switching of the three-way switching valve that is the switching unit 29. Therefore, it is possible to reduce the fluctuation of the discharge flow rate from the second hot water tap 3B.

  The pipe joining member according to the present invention is not limited to joining pipes provided with a two-fluid pipe line of a hot water supply pipe system, and other pipes provided with a two-fluid pipe such as a heating pipe system are joined. It goes without saying that the same applies to the matching.

It is a block diagram which shows the state when all the hot-water taps are in the closure state, in the circulation type hot-water supply system which shows the usage example of the pipe splicing member of one Example of this invention. It is a block diagram which shows the state when one of the taps is opened in the circulation type hot-water supply system of FIG. (A)-(f) is sectional drawing of the piping of the hot water supply / return hot water common use of various cross-sectional shapes used for the circulation type hot-water supply system of FIG. It is sectional drawing which shows the connection structure of the terminal part of piping shared with the hot water supply / returning hot water used for the circulation type hot-water supply system of FIG. It is a block diagram of the circulation type hot-water supply system of another example. It is a block diagram which shows the state when all the hot-water taps are plugged in the circulation type hot-water supply system which shows the usage example of the pipe joint member of the other Example of this invention. It is a block diagram which shows a state when one of the taps is opened in the circulation type hot-water supply system of FIG. It is a block diagram which shows the state when all the hot-water taps are in the closed state in the circulation type hot-water supply system which shows the usage example of the pipe joint member of other Example of this invention. It is a block diagram which shows a state when one of the taps is opened in the circulation type hot-water supply system of FIG. It is a top view which shows the specific structural example of a pipe jointing structural member. FIG. 11 is a front view showing two pipe joining components of FIG. 10 side by side. It is a left view of the pipe joint component of FIG. FIG. 11 is a right side view of the pipe joint component of FIG. 10. It is the sectional view on the AA line in FIG.

Explanation of symbols

8 (8A, 8B), 33 Pipe joining member 10 (10A, 10B, 10C) Piping shared with hot water supply / returning hot water 15 Partition wall 16 First fluid pipe 17 Second fluid pipe 18, 34 Cylindrical part 19, 35 Branching portion 20 Pipe joint body 21, 37, 47 Second flow passage 22, 38, 49 Third flow passage 23, 36, 48 Branching partition wall 24, 40, 45 Cylindrical partition wall 26, 43, 46 First 1 flow path 33A, 33B, 33C Pipe joining component 44 Blind plug part 50 4th flow path

Claims (3)

In a pipe joining member for joining pipes formed by partitioning into a first fluid pipe and a second fluid pipe with a partition wall in which the inside of the pipe is continuous in the pipe axis direction,
A pipe joint main body formed in a T shape having a cylindrical part and a branch part branched from the cylindrical part, and the inside of the pipe joint main body is a cylindrical part partition wall extending in the cylinder axis direction of the cylindrical part One end opening of the cylindrical part by partitioning with a branch part partition wall extending in a direction perpendicular to the cylindrical part partition wall from a position facing the branch part of the cylindrical part partition wall toward the opening end direction of the branch part A first flow passage that penetrates from the opening to the other end opening and is connected to the end of the first fluid conduit or the second fluid conduit, and communicates from the opening end of the branching portion to the one end opening of the cylindrical portion. A bent second flow passage connected to one end of either the first fluid conduit or the second fluid conduit, and the first fluid passage communicating from the opening end of the branching portion to the other end opening of the cylindrical portion. Bend connected to the other end of either the fluid line or the second fluid line Wherein the the third flow passage Jo are partitioned and formed tube seaming members. In a pipe splicing member that joins a plurality of pipes formed by partitioning into a first fluid pipe line and a second fluid pipe line by a partition wall in which the inside of each pipe is continuous in the pipe axis direction at its tip,
It consists of a plurality of pipe splicing components formed in a T shape having a cylindrical portion and a branched portion branched from this cylindrical portion,
The inside of each pipe joining component member is formed on a cylindrical partition wall extending in the cylinder axis direction of the cylindrical portion, and on a vertical plane orthogonal to the cylindrical partition wall from a location facing the branch portion of the cylindrical partition wall. A first flow passage penetrating from one end opening of the cylindrical portion to the other end opening by partitioning with a branching partition wall extending toward the opening end of the branching portion; and one end of the cylindrical portion from the opening end of the branching portion A bent second flow passage that communicates over the opening and is connected to one end of either the first fluid conduit or the second fluid conduit; and the other end opening of the cylindrical portion from the opening end of the branch portion And a section formed into a bent third flow passage connected to the other end of the first fluid pipe or the second fluid pipe,
Each pipe joint component is connected in series in the cylinder axis direction so that the ends of the cylindrical partition walls are in abutted state with each other, and the cylinder of the pipe joint component at the end in the cylinder axis direction. A pipe splicing member characterized in that the end of the part is closed by a blind plug. In a pipe splicing member that joins a plurality of pipes formed by partitioning into a first fluid pipe line and a second fluid pipe line by a partition wall in which the inside of each pipe is continuous in the pipe axis direction at its tip,
It consists of a plurality of pipe splicing components formed in a T shape having a cylindrical portion and a branched portion branched from this cylindrical portion,
The inside of the cylindrical part of each pipe joint component is partitioned into a first flow path and a second flow path by partitioning with a cylindrical part partition wall that is continuous in the cylinder axis direction. The cylindrical part partition wall communicates with the first flow passage by partitioning the cylindrical part partition wall with a branch part partition wall that is in the same plane as the cylindrical part partition wall extending from the portion facing the branch part to the opening end direction of each branch part. A third flow path connected to one end of either the first fluid pipe or the second fluid pipe; and the first fluid pipe or the second fluid pipe connected to the second flow path. Comparting with a fourth flow passage connected to the other end,
Each pipe joint component is connected in series in the cylinder axis direction so that the ends of the cylindrical partition walls are in abutted state with each other, and the cylinder of the pipe joint component at the end in the cylinder axis direction. A pipe splicing member characterized in that the end of the part is closed by a blind plug.

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