JP2008025613A - Plastic branch joint - Google Patents

Abstract

A resin in which a uniform or nearly uniform flow rate flows in a balanced manner from a predetermined pipe connection portion of a T-shaped joint body formed of a synthetic resin to all other pipe connection portions via branch portions. It is to provide a branch joint.
A resin branch joint having an inner water-stop structure having a T-shaped joint body 3 having pipe connection portions 2a, 2b, 2c in three directions, and a water passage portion that communicates horizontally in two directions of the joint body 3. A protrusion 6 for adjusting the flow rate balance having a height in the range of 20 to 60% of the inner diameter of the water passage is provided on the branch part 5 in 4a and 4b.
[Selection] Figure 1

Description

  The present invention relates to an all-resin-made resin branch joint used as a flexible pipe joint for water supply and hot water supply.

  Conventionally, a branch joint made of a T-shaped metal (gunmetal) has been used as one of the branch joints of a flexible pipe for water supply and hot water supply. The metal joint body 101 (FIG. 8) of this branch joint has a structure in which, for example, fluid flowing from one pipe connection portion 102 to the other pipe connection portions 104 and 105 via the branch portion 103 is caused by turbulent flow in the branch portion 103. The flow rate balance to each pipe connection part 104,105 mentioned above collapses by pressure loss, and a uniform flow rate does not flow. Therefore, in order to adjust the flow rate balance, a space portion 107 larger than the inner diameter of the water passage portion 106 is provided in the branch portion 103 so that the flow rates to the pipe connection portions 104 and 105 are uniform.

  By the way, there has been a problem that the manufacturing cost and the like of the conventional metal T-shaped branch joint is increased due to the recent rise in metal materials. Therefore, a T-shaped resin branch joint has been developed from the viewpoint of reducing manufacturing costs and the like.

  However, in the same manner as the metal T-shaped branch joint described above, a resin-made T-shaped branch joint formed by resin molding (injection molding) is also provided at the branch portion of the water passage portion of the joint body in order to adjust the flow rate balance. A large space portion must be formed, but when the large space portion as described above is formed at the branch portion, the mold after molding cannot be released.

  For this reason, the resin T-shaped branch joint cannot be provided with a large space portion in the branch portion similar to the conventional metal T-shaped branch joint, and the joint body does not have a large space portion in the branch portion. Therefore, when water was passed, there was a problem that the flow rate balance was poor and a uniform flow rate could not be passed through the branched water flow part.

  In addition, there exist the following patent documents 1 and 2 as a reference literature relevant to this invention. Patent Document 1 includes a conical shape in which an inner surface portion of a branch pipe protrudes inward toward the main pipe so that gas can be smoothly diverted without turbulent flow at the branching portion of the T-shaped branch pipe for the duct pipe. The structure which consists of is disclosed. However, the T-shaped branch pipe disclosed in Patent Document 1 is configured to smoothly divert the gas transferred from the main pipe into a branch pipe that crosses the main pipe and branches left and right. Therefore, a smooth and uniform flow rate cannot be diverted from the branch pipe to the main pipe and the other branch pipe.

  Patent Document 2 discloses a branch pipe having a configuration in which a protrusion is provided in the main pipe in order to make the flow rate to the plurality of branch pipes branched from the main pipe uniform. However, in the branch pipe disclosed in Patent Document 2, in order to make the flow rate to the plurality of branch pipes branched from the main pipe whose end portion is closed, the branch upstream of the most upstream branch pipe in the main pipe (fluid) Is provided on the upstream side of the main pipe to allow the fluid flowing from the upstream to the downstream of the main pipe to flow at a uniform flow rate through a plurality of branch pipes. Even if diverted as it is, a fluid having a uniform flow rate cannot flow through the branched pipe of the T-shaped branch joint.

Utility Model Registration No. 2536194 JP-A-6-11078

  The present invention has been developed in view of the above points, and the object of the present invention is from a predetermined pipe connection portion of a T-shaped joint body formed of synthetic resin to all other pipe connection portions. It is another object of the present invention to provide a resin-made branch joint that allows a uniform or nearly uniform flow rate to flow through the branch portion.

  The present invention is configured to effectively achieve the above object. That is, the present invention described in claim 1 is a resin branch joint having an inner water-stop structure having a T-shaped joint main body having pipe connection portions in three directions. The resin branch joint is characterized in that a protrusion for flow rate balance adjustment having a height in the range of 20 to 60% of the inner diameter of the water flow portion is provided at the branch portion in the portion.

  The present invention according to claim 2 is a resin branch joint having an inner water-stop structure having a T-shaped joint body having pipe connection portions in three directions. A cheese-type resin branch joint in which a step for adjusting the flow rate balance is provided in the inner diameter conversion part of both pipe connection parts formed in the above.

  According to a third aspect of the present invention, there is provided a resin branch joint having a water-blocking inner surface provided with a T-shaped joint body having pipe connection portions in three directions. A cheese-type resin branch joint in which a reduced diameter portion for adjusting a flow rate balance is provided on the inner diameter conversion portion side on the larger diameter side of both pipe connection portions formed in the above.

  In the present invention having the above-described configuration, the other pipe connection part branched from one pipe connection part of the water passage part that leads horizontally in the two directions of the joint body or from both pipe connection parts via the branch part. Even when a fluid is allowed to flow, the flow rate can be adjusted by allowing the fluid to pass through the protrusion, step, or diameter-reduced portion provided at the branch portion, and the fluid can be adjusted in a straight line direction and a branch direction. Alternatively, the flow rate can flow uniformly.

The best mode for carrying out the invention will be described below with reference to the drawings.
1-4 is a figure regarding the resin branch joint of 1st Example which concerns on this invention, Comprising: The resin branch joint 1 of this example is injection-molded by PPSU (polyphenyl sulfone), and is three directions. It is a joint (cheese type) of an inner surface water stop structure provided with a T-shaped joint body 3 having pipe connection portions 2a, 2b, and 2c.

  The inner diameters of the water passage portions 4a, 4b, and 4c of the pipe connection portions 2a, 2b, and 2c of the joint body 3 are the same in the illustrated example, and the water passage portions 4a and 4b of the pipe connection portion 2a and the pipe connection portion 2b are the same. Is horizontally communicated in two directions, and communicates with the water flow portion 4c in the right angle direction through the branch portion 5 between the water flow portions 4a and 4b.

  A projection 6 for adjusting the flow rate balance is provided at the center line position of the water flow portion 4c of the branch portion 5 between the water flow portions 4a and 4b. The protrusion 6 has a vertical cross-sectional triangle shape with a height of about 40% of the inner diameter of the water flow portions 4a and 4b, and partitions a place slightly lower than the lower half in the branch portion 5 of the water flow portions 4a and 4b. Is provided. If the protrusion 6 is too high, it is difficult for the fluid to flow to the water passage 4b side, and if it is too low, a large flow rate flows to the water flow portion 4b side, and the flow rate to the branched water passage portion 4c decreases, resulting in a flow balance. It gets worse. Therefore, the protrusion 6 preferably has a height in the range of 20 to 60% of the inner diameter of the water flow portions 4a and 4b, and a height of about 60% can adjust the flow rate balance most, and the water flow portion of the pipe connection portion 2a. A fluid having a uniform flow rate can be distributed from 4a to the water passing portions 4b and 4c of the pipe connecting portions 2b and 2c (see Table 1). When the height of the protrusion 6 is higher than 60% of the inner diameter of the water flow portions 4a and 4b, the total flow rate is reduced even if the flow rate balance flowing from the water flow portion 4a to the water flow portions 4b and 4c is maintained to some extent. Therefore, the height in the above range is preferred.

※ 表中の樹脂継手は本発明に係る樹脂製分岐継手を示し、砲金継手は従来の金属製分岐継手を示す。

* The resin joint in the table indicates the resin branch joint according to the present invention, and the gun metal joint indicates the conventional metal branch joint.

  The inner water stop structure in the resin branch joint 1 is the inner surface of a synthetic resin pipe (hose or the like) 7 formed of a resin such as crosslinked polyethylene or polybutene at the pipe connecting portions 2a, 2b and 2c. It is a structure which waters, Comprising: The tip part side of each pipe connection part 2a, 2b, 2c of the resin branch joint 1 is made into the structure as shown in FIG. 4 as an example. That is, it is possible to change from a diameter-expanded state having a diameter larger than that of the pipe connection part (nipple) 2a (2b, 2c) to a reduced diameter state, and the pipe end part of the synthetic resin pipe 7 is tightened by the pipe connection part (nipple) 2a. A compression ring 8 made of an elastic material, a diameter expansion piece 9 for holding the compression ring 8 in an expanded state, a transparent or translucent resin joint outer cylinder 10 covering the compression ring 8, and a tip of the joint outer cylinder 10 A cap nut 11 fitted to the outside of the joint side, a retaining ring 12 provided at the tip of the joint outer cylinder 10, and an O-ring 13 fitted into the groove of the pipe connecting portion (nipple) 2a. The diameter of the compression ring 8 is reduced by detaching the diameter-expanding piece 9 at the tip of the synthetic resin pipe 7 inserted into the pipe connection part 2a (2b, 2c) at the time of connection, and the inner surface of the synthetic resin pipe 7 is connected to the pipe connection part 2a ( Press against the outer peripheral surface of the O-ring 13 side of 2b and 2c) It is a structure in which the water shut-off.

  FIG. 5 is a sectional view of the joint body of the resin branch joint of the second embodiment according to the present invention, and the resin branch joint of this example is similar to the resin branch joint of the first embodiment, It is a joint (cheese type) of an inner surface water stop structure provided with a T-shaped joint body 3 having pipe connection portions 2a, 2b, and 2c in three directions. The resin branch joint according to the second embodiment has an inner diameter conversion portion (branch portion 5) of the water passage portions 4a and 4b of the pipe connection portions 2a and 2b formed in the horizontal direction in two directions of the joint body 3 and having different inner diameters. 14), a tapered step 15a for adjusting the flow rate balance is provided so as to be inclined from the end of the water flow portion 4a on the branch portion 5 side to the central portion of the branch portion 5. The inner diameter (16φ) of the water passage portion 4a is larger than the inner diameters of the other water passage portions 4b and 4c, and the water passage portion 4b and the water passage portion 4c have the same diameter (13φ). The external appearance of the joint body 3 of this example is slightly different from the resin branch joint of the first embodiment described above, but the other configuration is the same as that of the resin branch joint of the first embodiment, and the illustration and description are omitted. To do.

  Also in the resin branch joint of the second embodiment, the fluid flowing from the water flow portion 4a passes through the tapered step 15a of the inner diameter conversion portion (location of the branch portion 5) 14, thereby causing the step 15a. The balance is adjusted by causing the turbulent flow, and a fluid having a flow rate that is uniform or nearly uniform can be made to flow toward the water passing portions 4b and 4c.

  FIG. 6 is a cross-sectional view of the joint body of the resin branch joint of the third embodiment according to the present invention. The resin branch joint of the inner water stop structure of this example is also the resin branch joint of the second embodiment. Similarly to the inner diameter conversion part 14 (the central part of the water flow part 4c of the branch part 5) of the water flow parts 4a and 4b formed in two directions different in inner diameter of the joint body 3 in the horizontal direction. Step 15b is provided. In the resin branch joint of the third embodiment as well, the fluid flowing from the water flow portion 4a passes through the step 15a of the inner diameter conversion portion (location of the branch portion 5) 14 to the water flow portions 4b and 4c side. The fluid is smoothly diverted, and a fluid having a uniform or nearly uniform flow rate can flow toward the water flow portions 4b and 4c. The external appearance of the joint body 3 of this example is slightly different from the resin branch joint of the first embodiment described above, but the other configuration is the same as that of the resin branch joint of the first embodiment, and the illustration and description are omitted. To do.

  FIG. 7 is a cross-sectional view of the joint body of the resin branch joint of the fourth embodiment according to the present invention. In the resin branch joint of this example, both pipe connections formed horizontally in two directions of the joint body 3 are shown. The inner diameters of the portions 2a and 2b are different, and the concentric water-passing portion 4a and the water-flowing portion 4b on the large-diameter side of the water-passing portion 4b have a slightly tapered shape for adjusting the flow balance. The reduced diameter portion 17 is provided. Further, in this example, the inner diameter of the water flow portion 4a: the inner diameter of the water flow portion 4c = 0.75 to 0.95: 1, and the inner diameter of the water flow portion 4a is reduced to increase the thickness.

  The resin branch joint of the fourth embodiment also adjusts the fluid flowing from the water passage portion 4a by the inner diameter difference by passing through the reduced diameter portion 17 of the inner diameter conversion portion 14 (location of the branch portion 5). It is possible to flow a fluid having a flow rate that is smoothly divided and is uniform or nearly uniform toward the water flow portions 4b and 4c. The external appearance of the joint body 3 of this example is slightly different from the resin branch joint of the first embodiment described above, but the other configuration is the same as that of the resin branch joint of the first embodiment, and the illustration and description are omitted. To do.

It is sectional drawing of the coupling main body of the resin branch joint of 1st Example of this invention. It is the end elevation seen from the side of the pipe connection part 2b of FIG. It is a front view of the resin branch joint of the first embodiment of the present invention. It is explanatory drawing of the cross section of the inner surface water stop structure in the pipe connection part of the resin branch joint which concerns on this invention. It is sectional drawing of the coupling main body of the resin branch joint of 2nd Example of this invention. It is sectional drawing of the coupling main body of the resin branch joint of 3rd Example of this invention. It is sectional drawing of the coupling main body of the resin branch joint of 4th Example of this invention. It is sectional drawing of the joint main body of the metal branch joint of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Resin branch joint 2a, 2b, 2c Pipe connection part 3 Joint body 4a, 4b, 4c Water flow part 5 Branch part 6 Protrusion 14 Inner diameter conversion part 15a, 15b Step 17 Reduced diameter part

Claims (3)

  In a resin branch joint having an inner water-stop structure having a T-shaped joint body having a pipe connection portion in three directions, the inner diameter of the water passage section is set to 20 at the branch section in the water passage section that communicates horizontally in two directions of the joint body. A resin branch joint provided with a protrusion for flow rate balance adjustment having a height in a range of ˜60%.   Inner water-stopping resin branch joint with a T-shaped joint body having pipe connection parts in three directions, the inner diameters of both pipe connection parts formed horizontally in two directions with different inner diameters of water passage parts of the joint body A cheese-type resin branch joint, characterized in that a step for adjusting the flow rate balance is provided in the conversion part.   In a resin branch joint with a water-blocking inner surface provided with a T-shaped joint body having pipe connection parts in three directions, both pipe connection parts formed horizontally in two directions with different inner diameters of water passage parts of the joint body A cheese-type resin branch joint in which a reduced diameter portion for adjusting a flow rate balance is provided on the inner diameter conversion portion side on the diameter side.

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