JP2009133423A - Leakage preventive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a leakage preventive device usable regardless of its dimension, even in the device having no outer peripheral surface concentric with a pipe, by forming a connecting part of a connecting member in a hexagonal nut. <P>SOLUTION: This leakage preventive device has a side surface 5 crossing with the outer peripheral surface 4 of a pipe material 1 in the connecting part with the pipe material 1 of the connecting member 2 connected by being fitted around the pipe material 1 for passing fluid inside, and prevents the fluid from leaking outside from a crossing part between the side surface 5 and the outer peripheral surface 4 of the pipe material 1, and has a seal member 6 abutting on both surfaces 4 and 5 of the outer peripheral surface 4 and the side surface 5 of the crossing part, and a pressure contact means 7 for bringing the seal member 6 into pressure contact with both the surfaces 4 and 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a leakage prevention device such as a pipe connection portion.

  As this type of leakage prevention device, one disclosed in Patent Document 1 (Japanese Utility Model Publication No. 2-17272) is known.

This conventional one is a seal member that is externally fitted to the outer peripheral surfaces of both the pipe and the connection member in order to prevent leakage of fluid from a connection portion between the pipe and a connection member such as a socket connected to the pipe. And sealing the sealing member to close the leakage space to prevent external leakage of fluid from the connecting portion.
No. 2-17272

  In the conventional device, since the seal member is pressed against the outer peripheral surfaces of both the pipe and the connecting member, for example, when the connecting member is a valve or other equipment, the outer peripheral surface is a hex nut or the like. When it was formed in a non-circular irregular shape or did not have an outer peripheral surface concentric with the pipe, it could not be used.

  Therefore, the present invention provides a leak-proof device that can be used regardless of its dimensions even if the connecting portion of the connecting member is formed on a hexagon nut or does not have an outer peripheral surface concentric with the pipe. The purpose is to do.

  In order to achieve the above object, the present invention has taken the following measures. That is, the feature of the present invention is that the connecting portion of the connecting member that is externally fitted and connected to the pipe material through which the fluid passes has a side surface that intersects the outer peripheral surface of the pipe material. In the leakage preventing device for preventing the fluid from leaking to the outside from the intersecting portion between the side surface and the outer peripheral surface of the tube material, a seal member that contacts both the outer peripheral surface and the side surface of the intersecting portion; Pressure sealing means for pressing the seal member on both sides.

  The seal member includes a deformable member having an inner peripheral surface in contact with the pipe member, an outer peripheral surface in contact with the press contact means, and an end surface in contact with a side surface of the connection member, and the press contact means has the outer peripheral surface of the seal member in the radial direction. It is preferable that the end face of the sealing member is deformed to the side face side of the connecting member by pressing in the direction.

  Preferably, the seal member has a second end surface opposite to the end surface, and the pressure contact means is provided with a position restricting portion for restricting the position of the second end surface.

  The outer peripheral surface of the seal member may be formed as a tapered surface that increases in diameter toward the connection member side.

It is preferable to have position restricting means for restricting the axial position of the pressure contact means.
The press contact means may comprise a split ring that presses the seal member in the outer diameter direction.

The pressure contact means may have a diameter that can be reduced by a winding means.
The deformable member is elastically deformed or plastically deformed.

  According to the present invention, even if the connecting member does not have an outer peripheral surface that is concentric with the pipe material, the leakage space is blocked by the seal member that press-contacts the side surface of the connecting member and the outer peripheral surface of the pipe material. Leakage of fluid from the connecting portion is prevented.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 and FIG. 2 show an embodiment of the leakage preventing device of the present invention. This leakage preventing device prevents the internal fluid from leaking to the outside from the connecting portion between the pipe member 1 and the connecting member 2 that is externally connected to the pipe member 1.

  The tube material 1 is a hard tube made of a metal tube such as a steel tube or a cast tube, a concrete tube, or a synthetic resin, and the material thereof is not limited. The connecting member 2 is a pipe joint such as an elbow or a tee, a valve or a fluid device. The connecting member 2 is provided with a hole 3 for connecting to the tube material 1. The tube material 1 is connected to the hole 3. In general, the connection is made by screw connection between a male screw provided on the outer peripheral surface 4 of the pipe member 1 and a female screw provided on the connection member 2, but may be made by other connection means.

  In the connection portion between the tube material 1 and the connection member 2, the connection member 2 has a side surface 5 that intersects the outer peripheral surface 4 of the tube material 1.

  The leakage preventing apparatus according to the present invention includes a seal member 6 that contacts both the outer peripheral surface 4 of the pipe member 1 and the side surface 5 of the connecting member 2 at the intersection. In addition, a pressure contact means 7 for pressing the seal member 6 against the both surfaces 4 and 5 is provided.

  The seal member 6 is composed of a deformable member that can be elastically deformed or plastically deformed. Typical examples of elastically deformed materials include rubber and the like, and plastically deformed materials include putty and the like, but are not limited thereto. The seal member 6 has an inner peripheral surface 8 that is in contact with the outer peripheral surface 4 of the pipe member 1, an outer peripheral surface 9 that is in contact with the press contact means 7, and an end surface 10 that is in contact with the side surface 5 of the connecting member 2. In this embodiment, the seal member 6 is made of a cylindrical rubber.

  The press contact means 7 only needs to press the outer peripheral surface 9 of the seal member 6 radially inward to deform the end surface 10 of the seal member 6 toward the side surface 5 of the connection member 2.

  In this embodiment, the press contact means 7 includes a split ring 11 that presses the seal member 6 from the outer diameter direction. The dividing ring 11 is divided into two on the diameter line. At both ends of each of the split rings 11, 11, flanges 12 projecting in the radially outward direction are formed. A bolt insertion hole is formed in one of the opposing flanges 12 and 12, and a bolt screwing screw hole is formed in the other. By inserting the bolt 13 through the insertion hole and screwing the bolt 13 into the screw hole, the split rings 11 are formed as an integral ring.

  The seal member 6 made of a rubber cylinder disposed on the inner peripheral surface of the split ring 11 is also divided into two parts on the diameter line so as to be separable. The seal member 6 and the pressure contact means 7 are preferably fixed with an adhesive or the like.

  In the above-described embodiment, when the fluid inside leaks from the connection portion between the pipe member 1 and the connection member 2, the fluid leaks outside the pipe member 1 without stopping the fluid flowing inside the pipe member 1. can do.

  That is, the seal member 6 and the pressure contact means 7 that are divided into two are fitted on the outer peripheral surface 4 of the pipe member 1 at the connecting portion where leakage occurs. At this time, the end surface 10 of the seal member 6 is externally fitted so as to contact the side surface 5 of the connection member 2. Then, the split rings 11, 11 of the press contact means 7 are tightened with the bolts 13. In order to secure this tightening allowance, a predetermined gap is formed between the opposing flanges 12 and 12. By this tightening force, the seal member 6 is compressed from the inner and outer peripheral surfaces 8 and 9 and elastically deformed. Due to this elastic deformation, the end surface 10 of the seal member 6 comes into pressure contact with the side surface 5 of the connection member 2. Thus, the inner peripheral surface 8 and the end surface 10 of the seal member 6 are brought into close contact with the outer peripheral surface 4 of the tube material 1 and the side surface 5 of the connection member 2, so that the fluid leakage space is blocked and External leakage of fluid is prevented.

  In this embodiment, in order for the end face 10 of the seal member 6 to come into strong pressure contact with the side face 5 of the connection member 2, position restriction means 14 for restricting the axial position of the pressure contact means 7 is provided. The position restricting means 14 is composed of a sled bolt 15 screwed to the split ring 11 so as to be able to advance and retreat in the radial direction.

  By tightening the dowel bolt 15, the axial movement of the pressure contact means 7 is prevented, and the pressing force of the end face 10 of the seal member 6 is maintained.

  In order to strengthen the pressing force of the end surface 10 of the seal member 6, the seal member 6 has a second end surface 16 opposite to the end surface 10. A position restricting portion 17 for restricting the position is provided in the pressure contact means 7. That is, the position restricting portion 17 is composed of a stepped portion formed on the inner peripheral surface of the split ring 11 so as to protrude in the radial direction. When the second end surface 16 comes into contact with the stepped portion 17, the elastic deformation in the direction of the seal member 6 is restrained, and the elastic deformation is directed toward the side surface 5 of the connection member 2. The pressing force on the member 2 becomes strong.

  In the present invention, the number of divisions of the division ring 11 of the pressure contact means 7 is not limited to two divisions, and may be a larger division.

  When there is a possibility that the tightening force of the split ring 11 is weakened by the dowel bolt 15 of the position restricting means 14, a strip steel plate (not shown) or the like is provided between the outer peripheral surface 9 of the seal member 6 and the inner peripheral surface of the split ring 11. And the band steel plate may be pressed radially inward by a screw bolt (not shown) screwed to the split ring 11 so as to be able to advance and retract in the radial direction.

  3 and 4 show another embodiment of the present invention. A valve is illustrated as the connection member 2. The main difference from the above embodiment is the specific configuration of the position restricting means 14 that restricts the axial position of the press contact means 7.

That is, the position restricting means 14 is provided as a separate body from the press contact means 7.
5 to 7 are drawings showing specific shapes of the seal member 6 and the pressure contact means 7 used in the embodiment shown in FIGS. About this structure, since it is substantially the same as the previous embodiment, the description is used.

  8 to 10 are drawings showing specific shapes of the position restricting means 14 used in the embodiment shown in FIG. 3 and FIG. The position restricting means 14 includes a split ring 18. The configuration of the split ring 18 is basically the same as that of the split ring 11 of the press contact means 7, and the split ring 18 is fixed to the outer peripheral surface 4 of the tube material 1 by tightening a bolt 19.

  An anti-slip portion 20 is provided on the inner peripheral surface of the two-divided ring 18 of the position regulating means 14 instead of the seal member 6. The anti-slip portion 20 is configured by forming a rubber layer on the inner peripheral surface. Note that the anti-slip portion 20 may have a blade shape on the inner peripheral surface of the split ring 18 and bite into the outer peripheral surface 4 of the tube material 1.

  The position restricting means 14 prevents the pressing means 7 from moving in the axial direction (on the side opposite to the connecting member).

  In another embodiment shown in FIG. 11, one end portion of the split ring 11 of the press contact means 7 is hinged by a pin 21 so as to be rotatable, and a bolt 13 is provided on the flange 12 at the other end to be tightened. is there.

  In another embodiment shown in FIG. 12, the press contact means 7 is constituted by a winding fastening means 22.

  That is, the outer peripheral surface 9 of the seal member 6 fitted on the tube 1 is wound with a band steel plate 23 and the outer periphery thereof is further tightened with a chain 24. Since the detailed configuration is described in Japanese Patent Application Laid-Open No. 2000-266275, the description is used.

  In another embodiment shown in FIG. 13, the outer peripheral surface 9 of the seal member 6 is formed on a tapered surface 25 whose diameter increases toward the connecting member 2 side. By adopting such a shape, the pressing force to the pipe member outer peripheral surface 4 and the connecting member side surface 5 of the seal member 6 can be made substantially uniform.

  In addition, this invention is not limited to what is shown to the said embodiment. For example, the embodiments may be combined. The fluid is not limited to liquid but may be gas. In this embodiment, the outer peripheral surface 4 and the side surface 5 intersect at 90 degrees, but the angle is not limited to this. Moreover, both the outer peripheral surface 4 and the side surface 5 in contact with the seal member 6 are not limited to smooth or flat surfaces, and for example, a screw may be formed on the outer peripheral surface 4.

  The present invention can be used in various piping industries.

FIG. 1 is a partial cross-sectional view showing an embodiment of a leak-proof device according to the present invention. FIG. 2 is an assembled front view of the seal member and the pressure contact means shown in FIG. FIG. 3 is a front view showing another embodiment. 4 is a plan view of FIG. FIG. 5 is a front view of the pressure contact means shown in FIG. 6 is a partial cross-sectional side view of FIG. 5. 7 is a plan view of FIG. 8 is a front view of the position regulating means shown in FIG. 9 is a partial cross-sectional side view of FIG. FIG. 10 is a plan view of FIG. FIG. 11 is a front view showing another embodiment of the pressure contact means. FIG. 12 is a perspective view in which the press contact means is a tightening means. FIG. 13 is a cross-sectional view showing an embodiment in addition to a seal member.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Pipe material, 2 Connection member, 4 Outer peripheral surface of 5 Pipe member, Side surface of 6 Connection member, 6 Seal member, 7 Pressing means, 8 Inner peripheral surface of a seal member, 9 Outer surface of a seal member, 10 End surface of a seal member, 11 Division | segmentation Ring, 14 Positioning restricting means, 16 Second end face, 17 Position restricting portion, 22 Tightening means, 25 Tapered surface.

Claims (8)

The connecting portion of the connecting member that is externally fitted and connected to the pipe material through which the fluid passes has a side surface that intersects the outer peripheral surface of the pipe material, and the side surface and the outer peripheral surface of the pipe material In the leakage preventing device for preventing the fluid from leaking to the outside from the intersection,
A leakage preventing device comprising: a seal member that abuts on both the outer peripheral surface and the side surface of the intersecting portion; and a pressure contact means that presses the seal member against the both surfaces.   The seal member includes a deformable member having an inner peripheral surface in contact with the pipe member, an outer peripheral surface in contact with the press contact means, and an end surface in contact with a side surface of the connection member, and the press contact means has the outer peripheral surface of the seal member in the radial direction. The leakage preventing device according to claim 1, wherein the end face of the seal member is deformed to the side of the connecting member by pressing in the direction.   3. The seal member has a second end face opposite to the end face, and the pressure contact means is provided with a position restricting portion for restricting a position of the second end face. The leak-proof device as described.   The leakage preventing device according to claim 2, wherein an outer peripheral surface of the seal member is formed as a tapered surface having a diameter increasing toward the connection member.   The leak preventing apparatus according to claim 1, further comprising a position restricting unit that restricts an axial position of the press contact unit.   The leakage preventing device according to claim 1, wherein the pressure contact means includes a split ring that presses the seal member from an outer diameter direction.   The leakage preventing device according to any one of claims 1 to 6, wherein the press contact means is capable of reducing its diameter by a winding means.   The leakage preventing apparatus according to claim 2, wherein the deformable member is elastically deformed or plastically deformed.

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