JP2006329387A - Position variable valve mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that, in the case of connecting and installing a valve, there is no conventional valve mechanism capable of generally coping with various causes including falling and torsion of a pipe although there is a conventional technique to adjust distance between a valve box and piping and to adjust displacement of opposing bolt insertion holes in a pipe circumference direction. <P>SOLUTION: In the position variable valve mechanism, a ring-shape flexible packing is fit to an outer circumference near an opening of at least one flow passage pipe part of the valve box. The position variable valve mechanism has a loose packing receiver for receiving a back face of the flexible packing and a packing gland member for pressing a front face of the flexible packing. As an adjusting bolt is inserted through a support flange provided on an outer surface of the valve box, the packing gland member and the loose packing receiver, the flexible packing, the loose packing receiver and the packing gland member can be integrally moved in a pipe axis direction by the adjusting bolt. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the present invention, when maintaining and updating a position variable valve mechanism, particularly a water supply and sewerage facility, when a valve is connected and installed in the middle of an existing pipe or a new pipe, the difference in valve installation surface distance (dimensions) between the other pipe and The present invention relates to a variable position valve mechanism that can be easily connected and installed even if piping is tilted (tilted) or twisted.

  Generally, a valve in a water and sewage facility is connected and installed by aligning the flange of the opening of the flow pipe section of the valve box and the flange of the pipe end in the middle of the pipe that is divided and installed, and fastening with a bolt. Therefore, if there is a difference in the distance from the piping at the place where the valve box should be installed, or if the mating piping is tilted or twisted, the bolt insertion work cannot be performed and the target valve can be connected and installed. It will disappear.

  From this point, the technology described in the patent literature indicated by the applicant has been disclosed. According to Patent Document 1, a short flange pipe is inserted into the pipe body of the valve box, the short pipe and the pipe are connected with bolts, and a bolt insertion part and a short flange formed in two places on the pipe body of the valve box. Adjustment bolts are provided between the pipes to enable movement in the pipe axis direction along with the short flange pipe.

  However, according to the technique of Patent Document 1, even if the distance between the pipe body portion of the valve box and the pipe can be adjusted, it cannot cope with the collapse or twist of the pipe. There is only a seal ring that seals the gap, and if there is distortion in the tube axis direction, water leakage cannot be completely prevented.

  Further, according to Patent Document 2, the movable cylinder is fitted to the tube body part of the valve box, and the annular flange support part separated from the valve box is movable to the outer periphery of the valve body pipe part in the pipe circumferential direction. It is prepared and bolted.

According to the technique of this patent document 2, in addition to the distance adjustment by the movable cylinder, the positional deviation of the bolt insertion hole in the pipe circumferential direction can be eliminated. However, it is not possible to cope with the collapse or twisting of the piping, and the tube body portion of the valve box and the movable cylinder are sealed with an O-ring. It will not be possible to completely prevent water leakage.
JP 2003-314722 A JP 2004-245328 A

  The problem to be solved by the present invention is that, conventionally, when connecting and installing a valve, there has been a technique for adjusting the distance between the valve box and the pipe and adjusting the displacement in the pipe circumferential direction of the opposed bolt insertion hole. There is no valve mechanism that can deal with almighty causes such as tube collapse and twist.

  In order to solve the above-described problems, the position variable valve mechanism according to the present invention is configured such that an annular flexible packing is fitted to the outer periphery of the valve box near the opening of at least one flow path tube portion. A loose packing receiver for receiving the back surface and a packing pressing member for pressing the front surface of the flexible packing; a support flange provided on the outer surface of the valve box; and an adjustment bolt inserted through the packing pressing member and the loose packing receiver; The adjustment bolt enables the flexible packing, the loose packing receiver, and the packing pressing member to be integrally moved in the tube axis direction.

  Further, the position variable valve mechanism according to the present invention has a tapered surface formed on the front surface of the flexible packing, and an annular press working portion extending upright in the flexible packing direction on the packing pressing member. And a tapered portion that abuts the tapered surface of the flexible packing is formed at the tip of the press working portion. It is characterized in that a gap is provided between the surface and the above-described loose packing receiver and packing pressing member are rotatable.

  Furthermore, the position variable valve mechanism according to the present invention is characterized in that a plurality of support flanges provided on the outer surface of the valve box are formed radially at a predetermined angular pitch.

  The variable position valve mechanism according to the present invention is characterized in that the diameter of the insertion hole of the adjustment bolt of the support flange is formed to be at least larger than the diameter of the insertion hole of the adjustment bolt of the loose packing receiver.

  Furthermore, the position variable valve mechanism according to the present invention is characterized in that the pipe connected to the flow path pipe portion of the valve box is bolted between the flange and the packing pressing member described above.

  The variable position valve mechanism according to the present invention is configured as described above. According to the first aspect of the present invention, the flexible packing, the loose packing receiver, and the packing pressing member can be moved in the tube axis direction by the adjusting bolt in an integrated state. ). In addition, since the flexible packing is fitted on the outer periphery of the flow path tube portion of the valve box, a much larger size and volume can be used than a conventional O-ring or the like. Therefore, the sealing property can be maintained satisfactorily.

  Further, according to the invention described in claim 2, even if the packing pressing member is bent by the pressure caused by the distortion, the sealing performance of the flexible packing is not impaired by the pressure contact between the tapered surfaces. I can do it.

  Furthermore, according to the invention described in claim 3, it is possible to absorb distortion and deflection by the provided gap, and it is possible to prevent the sealing performance of the flexible packing from being impaired.

  According to the fourth aspect of the present invention, it is possible to cope with the twist of the flange of the pipe to be mated and the displacement of the bolt insertion hole.

  Further, according to the invention described in claim 5, the connection structure can be made stronger, the installation stability of the packing pressing member and the loose packing receiver can be improved, and the flexible packing and the loose packing There is little backlash in the operation of moving the receiving and packing pressing members as a unit.

  Furthermore, according to the invention described in claim 6, it is possible to allow the packing pressing member to bend or twist in response to the distortion.

  And according to invention of Claim 7, a valve box and piping will be airtightly connected by setting it as such a structure, and the position of a packing pressing member will be in the stable state after connection installation.

  This is realized by configuring as in the embodiment shown in the drawings.

  Next, an example of a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a position variable valve mechanism embodying the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a sectional view taken along line XX in FIG.

  In these drawings, reference numeral 1 denotes a valve box, and reference numeral 1a denotes a flow path pipe portion. An annular flexible packing 4 formed of rubber or the like is fitted on the outer periphery of the flow path tube portion 1a near the opening. In the figure, reference numeral 2 denotes a ring-shaped loose packing receiver that is fitted to the outer periphery of the flow path pipe portion 1a at the rear position of the flexible packing 4, and a concave portion 2a having a flat plate shape is formed on the front surface of the loose packing receiver. And the back surface of the flexible packing 4 is received by the bottom surface of the recess 2a.

  The flexible packing 4 described above has a pentagonal cross-sectional shape with a tapered surface A of approximately 45 degrees formed on the front surface thereof.

  On the other hand, reference numeral 3 in the figure denotes a packing pressing member that presses the flexible packing 4 from the front and holds the flexible packing 4 between the bottom surface of the concave portion 2a of the loose packing receiver 2, and this packing pressing member. 3 is provided with a cylindrical pressing work portion 3a which is integrally provided upright. The inner diameter size of the pressing work portion 3a is slightly larger than the outer diameter size of the flow path tube portion 1a. It fits along the outer peripheral surface from the opening side of the road pipe part 1a. The packing pressing member 3 is also formed in an annular shape, and the diameter of the through hole 3d at the center thereof is set so as to coincide with the inner diameter of the flow path pipe portion 1a and piping to be described later.

  A tapered surface 3b that is approximately 45 degrees toward the inner surface is formed at the tip of the pressing work portion 3a, and this tapered surface 3b comes into contact with the tapered surface A of the flexible packing 4. At this time, a gap 5 is formed between the portion B that is forward of the flexible packing 4 and the inner surface C of the pressing work portion 3a on the outer peripheral surface of the flow path tube portion 1a.

  In the present embodiment, four support flanges 7, 7,... Are integrally formed on the outer surface of the valve box 1, and these support flanges 7, 7,. However, the number increases at an even number as the valve diameter increases.

  Bolt insertion holes 8 are formed in the support flange 7, and the bolt insertion holes 8 are centered on the bolt insertion holes 9 formed in the loose packing receiver 2 and the bolts provided in the packing pressing member 3. It is arranged in a straight line with each center of the receiving hole 3e.

  Further, the diameter of the bolt insertion hole 8 in the support flange 7 is formed larger than that of the bolt insertion hole 9 in the general loose packing receiver 2. The adjustment bolt 5 is inserted into the bolt insertion holes 8 and 9, and the tip of the adjustment bolt 5 is screwed into the bolt receiving hole 3e of the packing pressing member. In the bolt insertion hole 8 in the support flange 7, nuts 11, 11 are screwed and positioned at the front and rear positions with respect to the adjustment bolt 5, and in the bolt insertion hole 9 of the loose packing receiver 2, the nut 11 is screwed only in the rear part thereof. To be positioned. By increasing the diameter of the bolt insertion hole 8, it is possible to allow the packing pressing member 3 to be flexible or twisted by the play portion when the adjustment bolt 5 is inserted.

  Further, the loose packing receiver 2 and the packing pressing member 3 described above are rotatable in the pipe circumferential direction of the flow path pipe portion 1a, and the flange 6 of the pipe 6a is twisted, that is, the position of the bolt insertion hole is displaced. Even if there is, there is something that can be easily handled.

  The pipe 6a to be connected is faced to the packing holding member 3 with its flange 6 and is firmly connected with the seal member 12 held between the connecting bolts 10, 10,... Thus, the positioning of the packing presser member 3 and the like is maintained in a stable state.

  The variable position valve mechanism according to the present invention is configured as described above. Although the present embodiment has been described for water and sewage facilities, the present invention can be widely applied to the distribution of various gases and powders and the connection of valves in the transfer piping without being particular about this.

It is a front view which shows the position variable valve mechanism which implemented this invention. It is a side view. It is arrow sectional drawing along the XX line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Valve box 1a Flow path pipe part 2 Loose packing receptacle 2a Recessed part 3 Packing pressing member 3a Holding work part 3b Tapered surface 3d Through hole 3e Bolt receiving hole 4 Flexible packing 5 Adjustment bolt 6 Flange 6a Piping 7 Support flange 8 Bolt insertion Hole 9 Bolt insertion hole 10 Connection bolt 11 Nut A Tapered surface B Outer peripheral surface of channel tube portion C Inner surface of presser working portion S Clearance

Claims (7)

  An annular flexible packing is fitted on the outer periphery of at least one flow path tube portion of the valve box, a loose packing receiver for receiving the back surface of the flexible packing, and a packing presser for pressing the front surface of the flexible packing. The adjustment bolt is inserted into the support flange provided on the outer surface of the valve box, the packing pressing member and the loose packing receiver, and the flexible packing, the loose packing receiver and the packing pressing member are integrated with the adjusting bolt. The position variable valve mechanism is characterized in that it can move in the direction of the tube axis.   A taper surface is formed on the front surface of the flexible packing described above, and the packing pressing member includes an annular pressing working portion extending upright in the flexible packing direction, and at the tip of the pressing working portion. 2. The position variable valve mechanism according to claim 1, wherein a tapered portion that abuts against a tapered surface of the flexible packing is formed.   The position variable valve mechanism according to claim 1 or 2, wherein a gap is provided between an inner surface of the pressing work portion and an outer surface of a flow path pipe portion of the valve box.   4. The position variable valve mechanism according to claim 1, wherein the loose packing receiver and the packing pressing member are rotatable.   5. A plurality of support flanges provided on the outer surface of the valve box are radially formed at a predetermined angular pitch. Position variable valve mechanism.   The diameter of the insertion hole of the adjustment bolt of the support flange described above is formed to be at least larger than the diameter of the insertion hole of the adjustment bolt of the loose packing receiver. The position variable valve mechanism according to claim 4 or 5. The piping connected to the flow path pipe portion of the valve box described above is bolted between the flange and the packing pressing member described above. The position variable valve mechanism according to claim 4, 5 or 6.

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