Resin pipe joint

A resin tube and synthetic resin technology, applied in the direction of pipe joints, pipes/pipe joints/pipe fittings, pipeline connection layout, etc., can solve the problems of inability to visually confirm, difficult to confirm with the naked eye, etc., and achieve good assembly workability and good handling. Effect

Active Publication Date: 2011-11-02
NIPPON PILLAR PACKING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the arrangement position of the pipe joint is a narrow place between other devices or a hidden place behind a suspended ceiling (ceiling), it is often impossible or difficult to confirm with the naked eye, and the pipe connection is often performed by trial and error. Nut tightening work

Method used

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  • Resin pipe joint
  • Resin pipe joint
  • Resin pipe joint

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example 〕

[0048] Such as figure 1 As shown, the resin pipe joint A of the first embodiment is used to connect the pipe 3 made of fluororesin (an example of synthetic resin represented by PFA, PTFE, etc.) Equal pipes are communicated and connected, and the joint main body 1 made of fluororesin (an example of synthetic resin represented by PFA, PTFE, etc.) and fluororesin (an example of synthetic resin represented by PFA, PTFE, etc.) Made of these two components of the union nut 2. also, figure 1 The tightening completed state (assembled state) after the union nut 2 has been screwed in by a predetermined amount is shown.

[0049] Such as figure 1 , figure 2 , Figure 4 As shown, the joint main body 1 is formed as a cylindrical member, and has: an inner cylinder (an example of a fitting cylinder) 4 at one end, which can expand the diameter of the end of the pipe 3 and is mounted on it; a cover cylinder portion 6, which Covering the outer peripheral side of the deep side part of th...

no. 2 example

[0083] The resin pipe joint A of the second embodiment is the same as the resin pipe joint A of the first embodiment except for the structure of the torque varying portion 26 . Therefore, only the different torque varying portion 26 will be described. Such as Figure 6 ~ Figure 8 As shown, the torque changing part 26 of the second embodiment is a structure composed of four convex parts 20 and eight concave parts 19, wherein the outer diameter of the convex parts 20 is smaller than the outer diameter of the outer peripheral flange 1A, and the concave parts 19 are not connected through The state to the radially outer side is formed at the female thread side end of the union nut 2 .

[0084] That is, if Figure 8 As shown, the recess 19 on the union nut 2 of the first embodiment (refer to image 3 etc.) is a shape covered by the protrusion 24 extending in the axis P direction. Thus, if Figure 6 As shown in (c), the part of the convex part 20 entering the concave part 19 can...

no. 3 example

[0089] Such as Figure 9 , Figure 10 , Figure 12 As shown, the resin pipe joint A of the third embodiment is used to connect the pipe 3 made of fluororesin (an example of synthetic resin represented by PFA, PTFE, etc.) Equal pipes are communicated and connected, and the joint main body 1 made of fluororesin (an example of synthetic resin represented by PFA, PTFE, etc.) and fluororesin (an example of synthetic resin represented by PFA, PTFE, etc.) Made of these two components of the union nut 2. also, Figure 9 The tightening completed state (assembled state) after the union nut 2 has been screwed in by a predetermined amount is shown.

[0090] Such as Figure 9 , Figure 10 , Figure 12 As shown, the joint main body 1 is formed as a cylindrical member, and has: an inner cylinder (an example of a fitting cylinder) 4 at one end, which expands the diameter of the end of the pipe 3 and can fit the pipe 3 over the outside; a cover cylinder 6 , which covers the outer perip...

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PUM

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Abstract

Provided is a resin pipe joint which is improved to have excellent assembling workability and handling performance by making it possible to check that a union nut has been tightened or almost has been tightened even when the pipe joint portion is invisible or difficult to recognize, and even at a noisy job site. A resin pipe joint is configured in such a manner that a diameter enlargement region (9) is pressed by a seal press portion (10) when a union nut (2) advances by screwing as a female screw (8) is screwed into a male screw (5) under a state where a tube (3) is fitted over an inner tube(4) to form a enlarged diameter portion (3A), wherein a torque variation portion (26) is configured so that the protrusion (20) of the joint body (1) and the recess (19) of the union nut (2) are fitted to or separated from each other by the flexural displacement of the protrusion (20) in the direction of the central axis (P) thereof when the seal press portion (10) presses the diameter enlargement region (9) to cause the turning and tightening of the union nut (2) that occurs approximately ahead of the end of the advancing by screwing of the screw nut.

Description

technical field [0001] The present invention relates to a resin pipe joint having a structure for expanding the diameter (outward expansion) of a pipe as a fluid conveyance path and connecting it. It is a resin pipe joint used as a connection unit for fluid equipment such as pumps, valves, filters, etc., or as a pipe connection unit for fluid delivery channels, which is suitable for piping of high-purity liquid or ultrapure water used in the technical manufacturing process. Background technique [0002] A pipe joint disclosed in Patent Document 1 is known as such a resin pipe joint. That is, the pipe (1) made of synthetic resin is forcibly pressed into the fitting cylinder (5) of the joint main body (4), or as in Patent Document 1 figure 2 As shown, the diameter of the tube end (2) is expanded in advance and inserted into the fitting cylinder (5). Then, the union nut (6) pre-embedded on the pipe is screwed to the joint body, and the union nut (6) is forced to be in the axi...

Claims

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Application Information

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IPC IPC(8): F16L33/22
CPCF16L2201/10F16L19/005F16L47/04F16L19/028F16L47/041F16L19/06F16L33/22F16L47/12F16L35/00
Inventor 今西良山田真照手岛一清中村岳宽岸本贵之增田昭宏中川健
Owner NIPPON PILLAR PACKING CO LTD
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