JP2017025543A - Water pipe joint and water meter unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water pipe joint capable of effectively preventing water leakage.SOLUTION: A water pipe joint comprises: a primary side support part 33; a position adjustment part 34, which is disposed so as to protrude from the primary side support part 33 to a secondary side or retreat and has a water passing channel in position adjustment part 341 that penetrates the position adjustment part; and a pressing member 35, which is disposed so as to protrude from the position adjustment part 34 to the secondary side or retreat and can be connected with a primary side end of a water supply device M and has a water passing channel in pressing member 351 that penetrates the pressing member. The pressing member 35 has an open hole 355, which extends in diameter direction from the water passing channel in pressing member 351 and penetrates an outer peripheral surface of the pressing member 35.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a water joint used when a water supply device such as a water meter is replaceably connected to a water pipe, and a water meter unit including the same.

  Patent Document 1 by the applicant of the present application describes a water supply joint that can connect a water supply device in a replaceable manner when connecting a water supply device such as a water meter into a water supply pipe.

  The joint for water supply described in Patent Document 1 (pressure-welded joint of Patent Document 1) includes a position adjusting unit ("spindle part" of Patent Document 1) located on the primary side of a water meter and a pressing member (" Crimping part "). The position adjusting unit is capable of moving back and forth in the axial direction with respect to the joint body to which the position adjusting unit is screwed. The presser member is positioned on the secondary side of the position adjusting unit, and is configured to move to the secondary side upon receiving water pressure.

  With this configuration, even if the distance between the position adjustment unit and the water meter is increased due to the influence of fluctuations in external temperature, external force, or the like, the presser member is pushed out of the position adjustment unit by water pressure. For this reason, it is hard to generate | occur | produce a water leak, for example by not producing a clearance gap between a position adjustment part and a water meter.

  Here, when replacing the water supply device, the water supply device may be removed from the water supply joint. As the position adjustment unit is moved to the primary side during removal, the presser member is sometimes pushed out of the position adjustment unit by being pushed by the remaining water pressure in the water joint.

JP 2007-139001 A

  Therefore, an object of the present invention is to provide a water supply joint that can prevent the pressing member from being removed due to the residual water pressure even when the water supply device is removed, and a water meter unit including the same.

  The present invention relates to a water supply joint used when a water supply device is replaceably connected in a water supply pipe, and is located on the primary side of the water supply device and is stationary in the installed state. A position adjustment unit provided so as to be able to advance and retreat from the primary side support part to the secondary side, and a position adjustment part through which a water passage in the position adjustment part passes therethrough, and provided so as to be able to advance and retreat from the position adjustment part to the secondary side, A presser member that is connectable to a primary side end of the water supply device and through which the water passage in the presser member passes, and the presser member has a diameter from the water passage in the presser member. It has a through hole extending in the direction and penetrating the outer peripheral surface of the pressing member.

  Moreover, this invention is located in the secondary side of the said water supply joint, and the water meter as said water supply apparatus, and the secondary side support part which is unmovable in an installation state, The said primary side support part, and said 2 It is a water meter unit provided with the base part which fixes a secondary side support part with a fixed distance.

  According to each said structure, a holding member has a through-hole extended from the water flow path in a holding member to radial direction, and penetrated the outer peripheral surface of the said holding member. This through-hole can release the water in the water passage in the press member to the outside of the press member when the press member moves to the secondary side. For this reason, when removing the water supply apparatus, it is possible to suppress the presser member from popping out and coming off due to the residual water pressure in the water passage in the presser member.

  And the said position adjustment part is equipped with the water stop member which prevents the water leak between the said position adjustment part and the said pressing member by contact | abutting on the outer peripheral surface of the said pressing member, and the said through-hole is the said water supply In the connected state of the equipment, it can be located on the primary side of the water stop member and closer to the primary side end of the presser member.

  According to the said structure, since a through-hole is a primary side rather than the said water stop member, and is located near the primary side edge part of the said press member, the water of the water flow path in a press member is carried out of a press member. The escape to the outside can be performed later in the movement of the presser member to the secondary side. Therefore, water can be prevented from being ejected from the through hole at the initial stage of the movement of the presser member to the secondary side.

  The pressing member includes a pressure receiving surface facing the primary side in order to generate a force to move the pressing member to the secondary side by receiving water pressure, and the water passage in the pressing member has a primary side. The portion is formed with a large diameter and the secondary portion is formed with a small diameter, a step exists at the boundary between the two portions, and the step includes the pressure receiving surface.

  According to the above configuration, since the pressure receiving surface is also formed with the formation of the step, it is easy to process the press member provided with the pressure receiving surface, and the volume of the solid portion of the press member can be reduced by forming the step. For this reason, it is possible to reduce the weight of the pressing member by the amount corresponding to the decrease in the volume.

  And the diameter dimension of the secondary side part in the said position adjustment part water passage can be made larger than the diameter dimension of the primary side part in the said position adjustment part water passage.

  According to the said structure, the direction of a secondary side part is expanded rather than the primary side part about the cross-sectional area of the water flow path in a position adjustment part. For this reason, the area of the pressure receiving surface of the pressing member can be ensured in order to generate a force that can move to the secondary side by receiving water pressure while securing the nominal diameter of the water supply joint.

  In this invention, even when removing the water supply device, it is possible to provide a water supply joint capable of suppressing the pressing member from being removed due to the residual water pressure, and a water meter unit including the same.

1 is an overall view of a water meter unit according to an embodiment of the present invention. It is a longitudinal cross-sectional view of the primary side piping unit which concerns on one Embodiment of this invention.

  Next, the present invention will be described by taking up one embodiment. The vertical direction is the direction in the state shown in FIGS. The axial direction S is a direction parallel to the longitudinal direction of the base portion 2.

  This embodiment is a water meter unit 1 attached to a pipe shaft or the like of an apartment house, and is used for water supply used when a water meter (quantifier) M as a water supply device is connected to a water pipe in a replaceable manner. A joint J is provided. In this embodiment, the water meter M is used as the water supply device, but the present invention is not limited to this, and as the water supply device, for example, a valve such as an emergency shutoff valve, a sensor unit, or the like can be used alone or in combination.

  As shown in FIG. 1, the water meter unit 1 of the present embodiment includes a base portion 2, a primary side piping unit 3 located on the primary side of the water meter M, and a secondary side located on the secondary side of the water meter M. A side piping unit 4 is provided. As shown in FIG. 1 or FIG. 2, the primary side piping unit 3 of the present embodiment includes a stop cock 31, an elbow 32, a primary side support portion 33, a position adjustment portion 34, and a pressing member 35 in order from the primary side. It consists of The water joint J constitutes a part of the primary side piping unit 3. The secondary side piping unit 4 includes a secondary side support portion 41.

  The base portion 2 has an elongated shape along the pipe extension direction. The base portion 2 is made of, for example, aluminum die casting. However, the material is merely an example and is not limited thereto. This base part 2 is fixed to a pipe shaft floor surface, a bracket or the like of the apartment house. For this reason, the pedestal portion 21 is formed in a flat plate shape at both ends in the longitudinal direction, and a fixing bolt mounting hole 211 is formed so as to penetrate the pedestal portion 21. A through hole 22 through which bolts B1 and B2 for fixing the primary side support part 33 and the secondary side support part 41 pass is formed in the vertical direction in the figure. In the base portion 2, a resin meter receiving member 5 is attached below the primary side end of the water meter M. The meter receiving member 5 can support the water meter M by coming into contact with the connecting screw portion M1 on the primary side of the water meter M from below. The contact is allowed to allow the water meter M to move in the axial direction S.

  The primary side support part 33 includes a fixing part 331 and a water flow part 332. The fixing part 331 is fixed to the base part 2 by a bolt B1. For this reason, the primary side support part 33 does not move in the installed state. The water flow portion 332 has a space that allows water to pass through, and is formed in a substantially cylindrical shape. An elbow 32 is attached to the primary side of the water passage portion 332, and a stop cock 31 is provided on the primary side of the elbow 32. The elbow 32 can be directed in an arbitrary direction around the axis with respect to the water passage portion 332. Note that the configuration on the primary side of the primary support 33 is not limited to the configuration of the present embodiment. For example, a pressure reducing valve can be incorporated between the elbow 32 and the stop cock 31, and various other configurations can be adopted.

  An O-ring 333, a retaining ring 334, and a set screw 335 are located in order from the end on the outer peripheral portion on the primary side of the water passage portion 332. The O-ring 333 prevents water leakage between the water passage portion 332 and the elbow 32. The retaining ring 334 prevents the elbow 32 from coming out of the water passage portion 332 while allowing the elbow 32 to rotate around the axis with respect to the water passage portion 332. The set screw 335 penetrates the elbow 32 in the radial direction, and the tip abuts against the outer peripheral surface of the water passage portion 332. Thereby, the elbow 32 can be fixed to the water passage 332 while maintaining a constant angle with respect to the axial direction S. An inner thread 336 is formed on the inner surface of the water passage portion 332 on the secondary side, and the position adjusting portion 34 can be screwed together.

  Similar to the primary side support portion 33, the secondary side support portion 41 includes a fixed portion 411 and a water flow portion 412. As with the primary side support portion 33, the fixing portion 411 is fixed to the base portion 2 with a bolt B2. The water passage portion 412 has a substantially cylindrical shape with a space that allows water to pass therethrough. A pressure detection plug 413 is screwed into the water passage portion 412 of the secondary side support portion 41. At the time of inspection, the pressure gauge 413 can be attached by removing the pressure-detecting plug 413 from the water passage 412. Further, a check valve 414 formed in a cartridge shape is incorporated in the water flow portion 412, and the back flow from the secondary side to the primary side is prevented in the water flow portion 412.

  The position adjustment unit 34 is a substantially cylindrical portion through which a water passage 341 in the position adjustment unit through which water that flows from the primary side passes. An external screw 342 is formed on a part of the outer periphery of the position adjusting portion 34 and is screwed with the internal screw 336 of the primary side support portion 33. Therefore, by rotating the position adjusting unit 34 around the axis, the position adjusting unit 34 can be advanced and retracted in the axial direction S with respect to the primary support 33. In order to perform this rotation, a plurality of rotation protrusions 343 protrude from the outer peripheral portion of the secondary side end portion of the position adjusting portion 34. The position adjustment unit 34 can be rotated by placing a hand on the rotation protrusion 343 or engaging a tool.

  By moving (retracting) the position adjusting unit 34 to the primary side, the distance between the secondary side end surface of the primary side piping unit 3 and the primary side end surface of the secondary side piping unit 4 is increased. In this state, the water meter M is disposed between the both end faces, and the secondary side piping unit 4 is connected by inserting the secondary side end of the water meter M. Thereafter, the position adjusting unit 34 is moved (advanced) to the primary side, and the primary side end of the water meter M is inserted into the primary side piping unit 3 to be connected. When removing the water meter M, the procedure is reversed. Therefore, the water meter M can be attached and detached. As described above, the position adjustment unit 34 can be moved forward and backward with respect to the primary side support unit 33 for the purpose of attaching and detaching the water meter M.

  An O-ring 344 is attached to the primary side of the outer peripheral portion of the position adjusting unit 34 to prevent water leakage between the position adjusting unit 34 and the primary side support unit 33.

  An enlarged diameter portion 345 having an enlarged inner diameter is formed at the secondary side end of the position adjusting portion 34. The presser member 35 is located in the enlarged diameter portion 345. An O-ring 346 as a water stop member is attached to the inner peripheral portion of the enlarged diameter portion 345, and the O-ring 346 comes into contact with the outer peripheral surface of the presser member 35, so that the position adjusting unit 34 and the presser member 35 are placed. Leakage between the two is prevented.

  In the position adjusting portion water passage 341, the primary side portion is a small diameter portion 3411 having a relatively small diameter, and the secondary side portion is a large diameter portion 3412 having a relatively large diameter. In the present embodiment, the diameter of the small diameter portion 3411 is 18 mm, and the diameter of the large diameter portion 3412 is 21.5 mm. The small diameter portion 3411 and the large diameter portion 3412 each have a constant inner diameter in the axial direction S, and a step 3413 is formed at a boundary portion between the small diameter portion 3411 and the large diameter portion 3412. As the flow path area increases, the flow velocity of the water flow passing through the position adjusting portion water passage 341 decreases at the large diameter portion 3412.

  As described above, in the present embodiment, the secondary side portion (large diameter portion 3412) is enlarged more than the primary side portion (small diameter portion 3411) with respect to the cross-sectional area of the position adjusting portion water passage 341. For this reason, it can move to the secondary side by receiving water pressure while ensuring the nominal diameter of the water supply joint J inside (without forming a portion smaller than the nominal diameter inside the water supply joint J). In order to generate force, the area of the pressure receiving surface 354 included in the pressing member 35 can be secured.

  The pressing member 35 is made of resin and has a substantially disk shape. The presser member 35 has a presser member water passage 351 that passes through in the axial direction S and through which the water flowing from the position adjustment portion water passage 341 passes. For this reason, it is possible to pass water from the position adjusting unit 34 to the water meter M through the water passage 351 in the holding member.

  The holding member water passage 351 has the same diameter as the large diameter portion 3412 of the position adjusting portion water passage 341 in the large diameter portion 3511 which is the primary side portion, and the small diameter portion 3512 which is the secondary side portion has a large diameter. The diameter is smaller than that of the portion 3511. The large diameter part 3511 and the small diameter part 3512 are formed concentrically. Since the large-diameter portion 3511 and the small-diameter portion 3512 have different diameter dimensions, there is a step at the secondary side end of the large-diameter portion 3511. In the present embodiment, the step has a plane orthogonal to the axial direction S, and this plane functions as the pressure receiving surface 354.

  The pressure receiving surface 354 is located at the primary end of the small diameter portion 3512 and faces the primary side. Therefore, a pressing force toward the water meter M is generated in the pressing member 35 that has received the water pressure on the pressure receiving surface 354. Therefore, since a mechanism for pressing the presser member 35 toward the water meter M can be formed together with the step, for example, the mechanism in the presser member 35 is more solid than that formed on the primary end surface of the presser member 35. The volume of the part can be reduced. Accordingly, it is possible to reduce the weight of the presser member 35 having a function of generating a pressing force by the amount corresponding to the decrease in the volume. Further, since the pressure receiving surface 354 can be formed together with the formation of the step, the pressing member 35 provided with the pressure receiving surface 354 can be easily processed.

  A meter support portion 352 for supporting the water meter M in the inserted state is formed on the secondary side of the presser member 35, and a primary side end portion of the water meter M is connected thereto. On the other hand, an O-ring 353 is attached to the secondary side end face to prevent water leakage between the pressing member 35 and the water meter M.

  The pressing member 35 is provided so as to be able to advance and retreat from the position adjusting unit 34 to the secondary side. In particular, the movement (advance) of the presser member 35 to the secondary side is performed in response to water pressure applied to the presser member 35.

  Due to the presence of the pressure receiving surface 354 inside the holding member 35, the pressure receiving surface 354 receives the water pressure of the water flow passing through the water passage 351 in the holding member, so that the holding member 35 receives the secondary side (the side of the water meter unit 1). ) Is generated. For this reason, it can suppress that water leaks between the water meter unit 1 and the primary side piping unit 3.

  As described above, since the pressure receiving surface 354 of the present embodiment is a plane orthogonal to the axial direction S, the water pressure can be efficiently converted into a force toward the secondary side.

  A through hole 355 penetrating the presser member 35 in the radial direction is formed on a side surface 3513 located at the periphery of the large-diameter portion 3511 of the water passage 351 in the presser member. The through hole 355 is located on the primary side of the pressure receiving surface 354.

  By means of the through-hole 355, when the presser member 35 moves to the secondary side (specifically, when the through-hole 355 moves to the secondary side from the O-ring 346), the water in the presser member water passage 351 is pressed down. It can escape to the outside of the member 35. For this reason, since the water pressure applied to the presser member 35 can be reduced, when the water meter M is removed, the presser member is moved by the water pressure of the water passage 351 in the presser member as the position adjusting unit 34 is moved to the primary side upon removal. It is possible to suppress 35 from jumping out of the position adjustment unit 34 and coming off. Further, in the through hole 355, the distance from the primary side end surface of the holding member 35 to the through hole 355 is smaller than the distance from the through hole 355 to the secondary side end surface. The through-hole 355 is located on the primary side of the O-ring 346 and close to the primary side end portion of the pressing member 35 in the connected state of the water meter M to the water supply joint J. The “near the primary side end” means the distance from the contact portion between the outer peripheral surface of the pressing member 35 and the O-ring 346 in the connected state of the water meter M to the primary side end of the pressing member 35. This means that it is closer to the primary side end than 1/2 of this. With this configuration, the through-hole 355 is not located on the secondary side of the O-ring 346 and does not allow water to flow until the later stage of the movement of the presser member 35 to the secondary side. Can be released to the outside of the presser member 35 later in the movement of the presser member 35 to the secondary side. Therefore, it is possible to prevent water from being ejected from the through-hole 355 at the initial stage of the movement of the presser member 35 to the secondary side (a state in which the presser member 35 has moved slightly).

  The water supply joint of the present embodiment configured as described above and the water meter unit 1 including the same generate a pressing force toward the water meter M on the pressing member 35 by the pressure receiving surface 354 of the pressing member 35. Be made. This pressing force makes it difficult for a gap to be formed between the pressing member 35 and the water meter M, so that it is difficult to cause water leakage. That is, it can be said that the presser member 35 can be advanced and retracted with respect to the position adjusting unit 34 for the purpose of preventing water leakage.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the summary of this invention.

  For example, the primary side support portion 33 does not have to have a structure that allows water to flow inside. For example, the primary side support portion 33 supports the elbow 32 from the outside, and the position adjustment portion 34 is provided so as to be able to advance and retreat with respect to the elbow 32. Can also be done.

  In addition, the pressure receiving surface 354 of the present embodiment is a plane orthogonal to the axial direction S, but may be a plane inclined with respect to the axial direction S. It can also be a curved surface.

  Further, the pressure receiving surface 354 of the present embodiment is provided at an intermediate position in the axial direction S of the presser member 35. For example, the presser member water passage 351 is formed to have the same diameter in the axial direction S (with the large diameter portion 3511). The primary end surface of the pressing member 35 may be the pressure receiving surface 354 without forming the small diameter portion 3512).

  Further, in the present embodiment, a step 3423 exists between the small diameter portion 3411 and the large diameter portion 3422 in the position adjustment portion internal water passage 341 of the position adjustment portion 34, but the small diameter portion 3411 and the large diameter portion 3422 are secondary. As the diameter gradually increases toward the side, the two can be connected without any step.

DESCRIPTION OF SYMBOLS 1 Water meter unit 2 Base part 33 Primary side support part 34 Position adjustment part 341 Water flow path in position adjustment part 3411 Small diameter part 3412 Large diameter part 3413 Step 346 Water stop member, O-ring 35 Press member 351 Press member internal flow path 3511 Large Diameter part 3512 Small diameter part 354 Pressure receiving surface 355 Through hole 41 Secondary side support part J Joint for water supply M Equipment for water supply, water meter S Axial direction

Claims (5)

In the joint for water supply used when connecting the water supply equipment in the water supply pipe in a replaceable manner,
A primary support that is located on the primary side of the water supply equipment and is stationary in the installed state;
A position adjustment unit provided so as to be capable of advancing and retreating from the primary side support unit to the secondary side, and having a water passage in the position adjustment unit passing therethrough;
A presser member provided so as to be able to advance and retreat from the position adjusting unit to the secondary side, connectable to a primary side end of a water supply device, and having a water passage in the presser member passing therethrough; Prepared,
The said press member has a through-hole extended in the radial direction from the said water flow path in a press member, and penetrated the outer peripheral surface of the said press member, The coupling for waterworks characterized by the above-mentioned. The position adjustment unit includes a water stop member that prevents water leakage between the position adjustment unit and the presser member by contacting the outer peripheral surface of the presser member,
The said through hole is a primary side rather than the said water stop member in the connection state of the said water supply apparatus, and is located in the primary side edge part of the said pressing member, It is characterized by the above-mentioned. The joint for water supply as described in 4. The pressing member includes a pressure receiving surface facing the primary side in order to generate a force to move the pressing member to the secondary side by receiving water pressure,
The water passage in the holding member is formed such that the primary side portion has a large diameter and the secondary side portion has a small diameter, a step is present at the boundary between the both portions, and the step includes the pressure receiving surface. The water joint according to claim 1 or 2.   The diameter dimension of the secondary side part in the said water passage in a position adjustment part is larger than the diameter dimension of the primary side part in the water flow path in a said position adjustment part, It is any one of Claims 1-3 characterized by the above-mentioned. Fitting for water supply. Water supply joint according to any one of claims 1 to 4,
A secondary side support that is located on the secondary side of the water meter as the water supply device and is stationary in the installed state;
A water meter unit comprising: a base portion that fixes the primary side support portion and the secondary side support portion at a fixed distance.

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