JP2009185941A - Fluid tube sealing member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid tube sealing member capable of effectively sealing a pointed head section of a fluid tube in a simple structure. <P>SOLUTION: A plug section 2 capable of preparing inside a fluid tube and a cylinder section 3 arranged outside the fluid tube while the plug section 2 is prepared inside the fluid tube are provided, and a groove 5 having a circular opening 4 capable of receiving the pointed head section of the fluid tube is formed between the plug section 2 and the cylinder section 3. The groove 5 is formed in a shape that its groove width W is getting smaller toward a bottom section 5d side. A screw thread-shaped guide projection 7 for relatively approaching and moving the pointed head section of the fluid tube and a bottom section 5d of the groove 5 is formed on side walls 5a, 5b of the groove 5 so as to cut into an outer periphery or the inner periphery of the fluid tube by a circumferential rotary operation to the fluid tube, and is mountably formed to the fluid tube in order to seal the pointed head of the fluid tube by clamping force between both side walls 5a, 5b of the groove 5 by relative-approaching movement between the pointed head section of the fluid tube and the bottom section 5d of the groove 5 accompanying the circumferential rotary operation. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fluid pipe sealing member that is attached to the tip of a fluid pipe in a state in which the tip of the fluid pipe such as a water supply / drain pipe, a hot water supply pipe, a gas pipe, a chemical transport pipe, and a drainage transport pipe is sealed.

  Conventionally, as this kind of fluid pipe sealing member, a rubber seal made of synthetic rubber as a dedicated water-stopping member made of an elastomer material and a metal that can be clamped and operated from the axial direction of the pipe inside the fluid pipe What is comprised from the made clamping mechanism is known. That is, the fluid pipe sealing member is in a state where the outer peripheral surface of the rubber packing and the inner peripheral surface of the fluid pipe are crimped by pressing the rubber packing from the axial direction of the pipe inside the fluid pipe by the clamping mechanism. The rubber packing is expanded and expanded until it is attached to the tip of the fluid tube in a state where the tip of the fluid tube is sealed.

  However, the conventional fluid pipe sealing member as described above employs a structure in which the rubber packing is mechanically clamped by a clamping mechanism, so that a plurality of types of materials (elastomer-based elastic material and metal material, etc.) having completely different properties are used. Therefore, there is a problem that a complicated structure with a large number of parts inevitably increases production costs.

  The present invention has been made in view of the above circumstances, and its main problem is to provide a fluid pipe sealing member capable of efficiently sealing the tip of a fluid pipe with a simple structure. It is in.

A first characteristic configuration of the present invention relates to a fluid pipe sealing member,
A plug portion that can be arranged inside the fluid pipe; and a cylinder portion that is arranged outside the fluid pipe in a state in which the plug portion is arranged inside the fluid pipe, and is provided between the plug portion and the cylinder portion. A groove portion having an annular opening capable of receiving the tip of the fluid pipe is formed,
The groove portion is configured in such a form that its groove width becomes smaller toward the bottom side, and the side wall portion of the groove portion bites into the outer peripheral surface or inner peripheral surface of the fluid pipe or both of them by a circumferential rotation operation with respect to the fluid pipe. In the form, a thread-shaped guide convex portion is formed that relatively moves the tip of the fluid pipe and the bottom of the groove,
Mounted on the fluid pipe in a state where the tip of the fluid pipe is sealed by the clamping force between the both side walls of the groove by relative proximity movement between the tip of the fluid pipe and the bottom of the groove accompanying the circumferential rotation operation. It is in the point which is comprised.

  According to the above configuration, since the tip of the fluid pipe is sealed by the clamping pressure between the both side walls of the groove, the sealing against the tip of the fluid pipe is performed while eliminating the need for a dedicated water stop member made of an elastomeric material. Performance can be obtained effectively, thereby simplifying the structure effectively.

The second feature configuration of the present invention is a configuration suitable for the implementation of the first feature configuration.
To make the groove width of the groove portion smaller toward the bottom side,
The inner peripheral surface of the cylindrical portion is configured such that the diameter is reduced toward the bottom side of the groove portion.

  According to the above configuration, the distal end portion of the fluid pipe can be deformed and guided in a direction in which the opening size of the fluid pipe is reduced by relative proximity movement between the distal end portion of the fluid pipe and the bottom portion of the groove portion accompanying the circumferential rotation operation. Therefore, the area to be sealed can be easily reduced accordingly. Therefore, it is possible to easily improve the sealing performance with respect to the distal end portion of the fluid pipe by using a structure for reducing the groove width of the groove portion toward the bottom side.

The third characteristic configuration of the present invention is a configuration suitable for implementing the first or second characteristic configuration,
The plug diameter increasing member that expands the outer diameter of the plug section is configured to be selectively mountable according to the thickness dimension of the fluid pipe.

  According to the above configuration, even when the thickness dimension of the fluid pipe is smaller than the set dimension, by selectively mounting the plug diameter increasing member, the outer peripheral surface of the plug part whose outer diameter is expanded by the plug diameter increasing member and the inner part of the cylindrical part The tip of the fluid pipe can be sealed by the clamping pressure with the peripheral surface, and in this respect, versatility with respect to the type of the fluid pipe can be effectively enhanced.

The fourth feature configuration of the present invention is a configuration suitable for implementing any one of the first to third feature configurations,
The cylindrical portion is provided with a confirmation window for visually confirming the insertion depth of the fluid pipe into the groove portion.

  According to the above configuration, it is possible to determine whether or not the sealing measure for the tip of the fluid pipe has been completed by visually confirming the insertion depth of the fluid pipe into the groove through the confirmation window. Therefore, it is possible to effectively suppress construction defects such as insufficient sealing measures at the tip of the fluid pipe.

The fifth characteristic configuration of the present invention is a configuration suitable for implementing any one of the first to fourth characteristic configurations,
Wherein the fluid pipe is a liquid transport pipe for transporting liquid,
The inner peripheral surface of the cylindrical portion is provided with an engaging portion that enables attachment to the fluid pipe in a state of being engaged with the outer peripheral surface of the fluid pipe before the tip of the fluid pipe is sealed. With
The groove portion is provided with a communication port that communicates with the outside in a mounting posture of the fluid pipe by the engagement portion.

  That is, for example, the state of the fluid pipe under a predetermined pressure (for example, occurrence of leakage) is inspected by applying a predetermined liquid pressure to the fluid pipe in a state where the tip of the fluid pipe is sealed. Yes. In this case, in order to ensure the setting accuracy of the liquid pressure in the fluid pipe, it is necessary to discharge something other than the liquid existing in the fluid pipe to the outside.

  On the other hand, according to the above configuration, before the tip of the fluid pipe is sealed, the fluid pipe other than the fluid existing in the fluid pipe through the communication port in a state in which the fluid pipe is attached to the engagement portion ( For example, it becomes possible to discharge gas, dust, etc.) to the outside. Therefore, it is possible to easily and easily ensure the setting accuracy of the liquid pressure in the fluid pipe when inspecting the state of the fluid pipe under a predetermined pressure.

The sixth characteristic configuration of the present invention is a configuration suitable for the implementation of the fifth characteristic configuration.
To configure the engaging portion,
The cylindrical portion is configured in such a form that its fluid pipe side end protrudes toward the fluid pipe side from the fluid side end face of the plug portion,
The guide convex portion is formed in a region including a protruding portion toward the fluid pipe on the inner peripheral surface of the cylindrical portion.

  According to the above configuration, the cylindrical portion is configured in such a manner that the end portion on the fluid pipe side protrudes more toward the fluid pipe side than the end surface on the fluid side of the plug portion. Can be guided to the opening portion of the groove portion in a form of contacting the protruding portion of the inner peripheral surface of the cylindrical portion when moving the tube relatively close to each other.

  And since the said guide convex part is formed in the area | region containing the said protrusion part, the front-end | tip of a fluid pipe | tube is carried out by the circumferential direction rotation operation from the state which engaged the front-end | tip part of the fluid pipe | tube with the protrusion part of the cylinder part. The part can enter the inside of the groove part from the opening part of the groove part and can be moved to the bottom side of the groove part.

  From these facts, it is possible to easily and easily secure the effect of ensuring the setting accuracy of the liquid pressure in the fluid pipe simply and easily, and to secure high operability of mounting the fluid pipe to the tip.

[First Embodiment]
1 to 4, for example, as shown in FIG. 5, a synthetic resin water supply pipe P (an example of a fluid pipe, for the purpose of water pressure inspection (specifically, a water leakage confirmation inspection for a predetermined time under a predetermined water pressure)) and the like. 1 shows a hydraulic pressure test plug 1 (an example of a fluid pipe sealing member) used to seal a tip portion p2 of an example of a liquid transport pipe.

  The water pressure inspection plug 1 includes a plug portion 2 that can be disposed inside the water supply pipe P, and a cylinder portion 3 that is disposed outside the water supply pipe P in a state where the plug portion 2 is disposed inside the water supply pipe P. Is provided. Between the plug part 2 and the cylinder part 3, a groove part 5 having an annular opening 4 capable of receiving the tip of the water supply pipe P is formed.

  As shown in FIGS. 1, 3, and 4, the plug portion 2 is configured in a substantially cup-shaped cylindrical body in which the lower surface portion 2 a (water supply pipe side surface) is closed and opened upward. In addition, the cylindrical portion 3 is formed in a deformed square cylindrical shape in which the inner peripheral surface 3a is cylindrical and the outer peripheral surface 3b is a hexagonal cylindrical shape, and the lower end portion of the cylindrical portion 3 is the lower end surface of the plug portion 2 ( That is, it is configured with a height dimension that projects downward from the lower end surface line x2) of the plug portion 2. And the upper end part of the plug part 2 and the upper end part of the cylinder part 3 are connected via the substantially ring-shaped connection piece part 6. FIG.

  That is, the side wall portions 5 a and 5 b of the groove portion 5 are constituted by the outer peripheral surface 2 b of the plug portion 2 and the inner peripheral surface 3 a of the cylindrical portion 3, and the bottom portion 5 d of the groove portion 5 is the lower surface of the connecting piece portion 6. It consists of parts.

  The groove portion 5 is configured such that the groove width W thereof becomes smaller toward the bottom portion 5d. Specifically, as shown in FIG. 4, the outer peripheral surface 2 b of the plug portion 2 has a diameter-expanded form (in detail, a tapered surface) that is displaced to the opposite side (that is, the outer side) from the tube axis Y toward the upper side. Shape), and the inner peripheral surface 3a of the cylindrical portion 3 is configured in a reduced diameter form (specifically, a tapered surface shape) that is displaced toward the tube axis Y side (that is, inside) toward the upper side. ing.

  And the inner peripheral surface 3a of the said cylinder part 3 makes the front-end | tip part p2 of the water supply pipe P, and the bottom part 5d of the groove part 5 in the form which bites into the outer peripheral surface p1 of the water supply pipe P by the circumferential direction rotation operation with respect to the water supply pipe P. A thread-like guide convex portion 7 to be moved in proximity is formed. The guide convex portion 7 has a saw-blade shape or a substantially saw-blade shape cross-sectional shape so that it can exhibit a function like a female screw, and spirals over both upper and lower end portions of the inner peripheral surface 3a of the cylindrical portion 3. It is extended to.

  That is, the water pressure test plug 1 is sandwiched between the side wall surfaces 5a and 5b of the groove 5d by relative proximity movement between the tip part p2 of the water supply pipe P and the bottom part 5d of the groove part 5 accompanying the circumferential rotation operation with respect to the water supply pipe P. It is comprised so that attachment with respect to the water supply pipe P is possible in the state which sealed the front-end | tip part p2 of the water supply pipe P with a pressure.

  As shown in FIG. 5 (b), the groove portion 5 can be attached to the water supply pipe P in a state in which it engages with the outer peripheral surface p1 of the water supply pipe P before the front end portion p2 of the water supply pipe P is sealed. An engaging portion 8 is provided. The engaging portion 8 includes a protruding portion 3d that protrudes downward from the lower surface portion 2a of the plug portion 2 in the cylindrical portion 3, and the guide convex portion 7 that is positioned on the inner peripheral surface of the protruding portion 3d. .

  The groove portion 5 is provided with a communication port 9 that communicates with the outside in the mounting posture of the water supply pipe P by the engaging portion 8. The communication port 9 is composed of a plurality of elongated holes formed in the connection piece 6 so as to be dispersed in the circumferential direction of the water supply pipe P. Further, the water pressure test plug 1 is provided with a guide portion that guides the distal end portion of the water supply pipe P to the opening portion 4 of the groove portion 5. The guide portion is constituted by the protruding portion 3 d of the cylindrical portion 3.

  Note that a plurality of gripping operation pieces 3e that are used when the operator performs a gripping operation project from the lower portion of the outer peripheral surface 3b of the cylindrical portion 3. Moreover, in this example, the water pressure test plug 1 is integrally molded from a synthetic resin material.

Next, a method of using the water pressure inspection plug 1 configured as described above will be described.
As shown in FIG. 5 (a), the water pressure test plug 1 is operated close to the water supply pipe P so that the tip end of the water supply pipe P is inserted into the opening of the cylindrical portion 3, and then the water pressure test plug 1 is attached. Rotate the water supply pipe P in the circumferential direction. With this rotation operation, the tip of the water supply pipe P moves toward the opening 4 of the groove 5. And as shown in FIG.5 (b), before the front-end | tip part of the water supply pipe P reaches the opening part 4 of the groove part 5, rotation operation is once stopped.

  At this time, the water pressure inspection plug 1 is mounted and held on the water supply pipe P in a state in which the engaging portion 8 is engaged with the tip end portion p2 of the water supply pipe P. In addition, the base end part of the water supply pipe P is connected to a water supply source etc. through the water tap.

  Incidentally, the rotation operation is performed by rotating the outer peripheral surface 3b of the cylindrical portion with an operating tool (operating tool such as a wrench engaged) or holding the grip operation piece 3e formed on the outer peripheral surface 3b of the cylindrical portion 3. It can be performed by rotating in a state.

  Next, as shown in FIG. 5 (b), water supply to the water supply pipe P is started, and the inside of the water supply pipe P together with the water through the opening 4 of the groove 5, the inside of the groove 5, and the communication port 9 of the groove 5. Releases gas (bubbles and, in some cases, dust) to the outside.

  After releasing the internal gas of the water supply pipe P to the outside, the water pressure test plug 1 is rotated again while water is supplied to the water supply pipe P so that the distal end portion p2 of the water supply pipe P and the bottom portion 5d of the groove portion 5 are relatively close to each other. I will move it. And as shown in FIG.5 (c), that the outflow of the water from the communicating port 9 was stopped by the clamping pressure of the both-side wall parts 5a and 5b of the groove part 5 (namely, the front-end | tip part p2 of the fluid pipe P was sealed. The rotation operation of the water pressure inspection plug 1 is finished. Thereby, the water pressure test plug 1 is attached to the distal end portion p2 of the water supply pipe P in a state in which the distal end portion p2 of the water supply pipe P is sealed.

  That is, the water pressure inspection plug 1 allows the internal gas of the water supply pipe P to be exposed to the outside through the communication port 9 in a state where the water supply pipe P is attached to the engaging portion 8 before the front end portion p2 of the water supply pipe P is sealed. While being able to discharge | release, the front-end | tip part p2 of the water supply pipe P and the bottom part 5d of the groove part 5 can be relatively closely moved by the continuous circumferential direction rotation operation from this state. Therefore, while the setting accuracy of the water pressure in the water supply pipe P can be easily and easily ensured, the mounting operability of the water supply pipe P with respect to the distal end portion p2 can be ensured high.

[Second Embodiment]
As shown in FIGS. 6 and 7, the hydraulic pressure test plug 1 of the second embodiment is provided with a water stop improvement means 10 having water stop and elasticity between the plug portion 2 and the tube portion 3. Yes.

  The water stop improvement means 10 is composed of an O-ring 10a made of synthetic rubber and disposed with the outer peripheral surface protruding outward from the outer peripheral surface 2b of the plug portion 2.

  Specifically, an annular mounting step 2d is formed at the lower end of the plug portion 2, and the O-ring 10a is externally mounted on the mounting step 2d in an elastically expanded state. That is, the O-ring 10a is mounted in a state where the cylindrical peripheral wall surface 2e of the mounting step 2d is pressed by the inner peripheral surface of the O-ring 10a.

  Further, as shown in FIG. 7, a tapered surface portion p <b> 3 that gradually increases in diameter toward the distal end side is formed on the inner peripheral surface of the distal end portion p <b> 2 of the water supply pipe P. Therefore, when the front end portion p2 of the water supply pipe P enters the inside of the groove portion 5, it is effective that the O-ring 10a is caught inside the groove portion 5 due to the frictional force with the front end portion p2 of the water supply pipe P. Deter.

  In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Third Embodiment]
As shown in FIGS. 8 to 10, in the hydraulic pressure test plug 1 of the third embodiment, the plug diameter increasing member 11 that expands the outer diameter of the plug portion 2 is selectively mounted according to the inner diameter of the water supply pipe P. It is configured to be possible.

  On the lower end side of the plug portion 2, a mounting step portion 2e (an example of a mounting portion) for mounting the plug diameter increasing member 11 in a fitted state is formed. The plug diameter enlarging member 11 is composed of a cup-shaped cap body having an upper opening that can be mounted on the mounting step 2e in an externally fitted state from below.

  The outer peripheral surface 11a of the plug diameter increasing member 11 is configured in a reduced diameter form (specifically, a tapered surface shape) that is reduced in diameter toward the lower side. The outer peripheral surface 11 a constitutes the side wall portion 5 b of the groove portion 5 when attached to the plug portion 2. The plug diameter increasing member 11 has a chamfered outer peripheral portion at the lower end portion, and an annular flange 11b protruding outward at the upper end portion of the plug diameter expanding member.

  As shown in FIG. 9, when the thickness dimension of the water supply pipe P is relatively large, the water pressure test plug 1 is attached to the water supply pipe P without the plug diameter increasing member 11 being attached. The tip portion p2 of the tube P can be sealed. On the other hand, as shown in FIG. 10, when the thickness dimension of the water supply pipe P is small, the water pressure test plug 1 is attached to the water supply pipe P in a state where the plug diameter expanding member 11 is attached to the attachment step 2e of the plug part 2. By doing so, the front-end | tip part of the water supply pipe P can be sealed.

  In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Other Embodiments]
(1) As an improvement of the above-described embodiments, for example, as shown in FIG. 11, one or a plurality of confirmation windows 12 for visually confirming the insertion depth of the fluid pipe P into the groove portion 5 is provided in the cylinder. The unit 3 may be provided.

  In this case, it is possible to determine whether or not the sealing of the tip of the fluid pipe P has been completed by visually confirming the insertion depth of the fluid pipe P into the groove through the confirmation window 12. Therefore, it is possible to effectively prevent construction defects such as insufficient sealing measures for the tip portion p2 of the fluid pipe P.

  It should be noted that a mark indicating the insertion depth target line or the like is preferably attached to the peripheral edge of the confirmation window 12 or the like.

(2) The specific configuration such as the shape of the cylindrical portion 3 is not limited to the configuration shown in the above-described embodiments, and various configuration changes are possible. For example, as shown in FIG. 12, the outer peripheral surface 3b of the cylindrical portion 3 is configured in a substantially hexagonal cylindrical shape, and the gripping operation piece 3e is configured by projecting the hexagonal cylindrical corner portion along one direction. Alternatively, although not shown, a hexagonal cylindrical shape or a cylindrical shape in which the gripping operation piece 3e is absent may be used.

(3) The specific configuration of the plug portion 2 is not limited to the configuration shown in each of the above-described embodiments, and various configuration changes are possible. For example, in each of the above-described embodiments, the internal space is on the upper side. Although the case where it is configured in a substantially cup shape that opens is shown as an example, a solid configuration that does not have an internal space may be used.

(4) In each of the above-described embodiments, the case where the water pressure test plug 1 is integrally formed is shown as an example. However, the water pressure test plug 1 includes a plurality of members (for example, a plug portion side member and a tube constituting the plug portion 2). The cylinder part side member etc. which comprise the part 3 may be comprised.

  As described above, when the water pressure test plug 1 is composed of the plug part side member and the cylinder part side member, for example, the plug part side member and the cylinder part side member are engaged with each other in a state in which relative rotation is impossible in the circumferential direction. Structure (that is, a structure in which the plug-side member and the tube-side member rotate integrally by the circumferential rotation operation), or the tube-side member and the plug-side member are engaged so as to be relatively rotatable. Any structure (structure in which the plug-side member or the cylinder-side member rotates independently by the circumferential rotation operation) may be used. In addition, what is necessary is just to provide the said guide convex part in the member of the side rotated by circumferential direction rotation operation, when taking the structure mentioned later.

(5) The fluid pipe is not limited to the water supply pipe P shown in each of the above-described embodiments, but may be a drain pipe, a hot water supply pipe, a gas pipe, or various pipes such as a pipe for transporting a chemical solution or a drainage liquid. .

(6) In each of the above-described embodiments, the hydraulic pressure test plug used for the hydraulic pressure test is shown as an example of the fluid pipe sealing member. However, the fluid pipe sealing member is attached to the tip of the fluid pipe in a state of sealing the tip of the fluid pipe. As long as it is used, it may be used for any purpose.

(7) In each of the above-described embodiments, the case where the inter-fluid sealing member 1 is made of a synthetic resin has been described as an example, but may be made of metal or glass.

(8) In each of the above-described embodiments, the case where the guide convex portion is provided on the inner peripheral surface 3a of the cylindrical portion 3 is shown as an example, but the guide convex portion may be provided on the outer peripheral surface 2b of the plug portion 2, Alternatively, both of the inner peripheral surface 3 a of the cylindrical portion 3 and the outer peripheral surface 2 b of the plug portion 2 may be provided.

(9) The specific configuration of the guide projection 7 is not limited to the configuration shown in the above-described embodiments, and various configuration changes can be made. For example, in each of the above-described embodiments, the case where the saw blade has a cross-sectional shape is shown as an example, but a simple mountain-like cross-sectional shape may be used. Further, in each of the above-described embodiments, the case where they are continuously formed in a spiral shape has been described as an example, but they may be formed in a dispersed manner.

(10) In each of the above-described embodiments, the case where the inner peripheral surface 3a of the cylindrical portion 3 is configured to be reduced in diameter toward the bottom side of the groove portion 5 has been described as an example, but the outer peripheral surface 2a of the plug portion 2 is illustrated. However, if it is comprised in the form which diameter-expands the bottom part side of the groove part 5, it is not necessary to make it the diameter reduction form as mentioned above.

(11) In each of the above-described embodiments, the case where the outer peripheral surface 2a of the plug portion 2 is configured to expand in diameter toward the bottom side of the groove portion 5 has been described as an example, but the inner peripheral surface 3a of the cylindrical portion 3 is If the diameter of the groove 5 is reduced toward the bottom side, the diameter may not be increased as described above.

(12) In each of the above-described embodiments, the specific configuration for expanding the outer peripheral surface 2a of the plug portion 2 or the specific configuration for reducing the diameter of the inner peripheral surface 3a of the tube portion 3 is the same as that of each of the above-described embodiments. The shape is not limited to the tapered surface shape shown, but may be a stepped shape.

(13) The specific configuration such as the structure of the engaging portion 8 and the specific configuration such as the position and shape of the communication port 9 are not limited to the configurations shown in the above-described embodiments, and various configurations can be changed. .

The top view (top view) which shows the fluid pipe | tube obstruction | occlusion member in 1st Embodiment. The side view which shows the fluid pipe | tube obstruction | occlusion member in 1st Embodiment. The bottom view (bottom view) which shows the fluid pipe | tube obstruction | occlusion member in 1st Embodiment. IV-IV sectional view of FIG. Sectional drawing which shows the usage method of the fluid pipe | tube obstruction | occlusion member in 1st Embodiment (a) Initial process (b) Middle process (c) Final process Sectional drawing which shows the fluid pipe | tube obstruction | occlusion member in 2nd Embodiment. Sectional drawing which shows the usage method of the fluid pipe | tube obstruction | occlusion member in 2nd Embodiment (a) Initial process (b) Middle process (c) Final process Sectional drawing which shows the fluid pipe | tube obstruction | occlusion member in 3rd Embodiment. Sectional drawing which shows the use condition of the fluid pipe | tube obstruction | occlusion member in 3rd Embodiment. Sectional drawing which shows the use condition of the fluid pipe | tube obstruction | occlusion member in 3rd Embodiment. The side view which shows the fluid pipe | tube obstruction | occlusion member in other embodiment. The top view which shows the fluid pipe | tube obstruction | occlusion member in other embodiment.

Explanation of symbols

P Fluid pipe p2 Tip 1 Fluid pipe sealing member (Hydraulic test plug)
2 Plug part 2b Outer peripheral surface 3 Cylinder part 3a Inner peripheral surface 3d Projection part 4 Opening part 5 Groove part 5d Bottom part 5a Side wall part 5b Side wall part 5b Guide convex part W Groove width 8 Engagement part 9 Communication port 11 Plug diameter expansion member 12 Confirmation window

Claims (6)

A plug portion that can be arranged inside the fluid pipe; and a cylinder portion that is arranged outside the fluid pipe in a state in which the plug portion is arranged inside the fluid pipe, and is provided between the plug portion and the cylinder portion. A groove portion having an annular opening capable of receiving the tip of the fluid pipe is formed,
The groove portion is configured in such a form that its groove width becomes smaller toward the bottom side, and the side wall portion of the groove portion bites into the outer peripheral surface or inner peripheral surface of the fluid pipe or both of them by a circumferential rotation operation with respect to the fluid pipe. In the form, a thread-shaped guide convex portion is formed that relatively moves the tip of the fluid pipe and the bottom of the groove,
Mounted on the fluid pipe in a state where the tip of the fluid pipe is sealed by the clamping force between the both side walls of the groove by relative proximity movement between the tip of the fluid pipe and the bottom of the groove accompanying the circumferential rotation operation. A fluid pipe sealing member configured as described above. To make the groove width of the groove portion smaller toward the bottom side,
The fluid pipe sealing member according to claim 1, wherein an inner peripheral surface of the cylindrical portion is configured to be reduced in diameter toward a bottom side of the groove portion.   The fluid pipe sealing member according to claim 1 or 2, wherein the plug diameter increasing member for expanding the outer diameter of the plug section is configured to be selectively mountable according to the thickness dimension of the fluid pipe.   The fluid pipe sealing member according to any one of claims 1 to 3, wherein the cylinder part is provided with a confirmation window for visually confirming an insertion depth of the fluid pipe into the groove part. Wherein the fluid pipe is a liquid transport pipe for transporting liquid,
The inner peripheral surface of the cylindrical portion is provided with an engaging portion that enables attachment to the fluid pipe in a state of being engaged with the outer peripheral surface of the fluid pipe before the tip of the fluid pipe is sealed. With
The fluid pipe sealing member according to any one of claims 1 to 4, wherein the groove part is provided with a communication port that communicates with the outside in a mounting posture of the fluid pipe by the engaging part. To configure the engaging portion,
The cylindrical portion is configured in such a form that its fluid pipe side end protrudes toward the fluid pipe side from the fluid side end face of the plug portion,
The fluid pipe sealing member according to claim 5, wherein the guide convex part is formed in a region including a protruding part toward the fluid pipe on the inner peripheral surface of the cylindrical part.

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