JP2008151674A - Water meter system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water meter system capable of preventing water discharge from an intermediate metal fixture, when a water meter or a check valve are dismounted, while the intermediate metal fixture is connected to a water pipe. <P>SOLUTION: In this water meter system 100, when a rotary cylinder part 30 is rotated and arranged on a water stop position, the interval between each end channel 12, 13 provided in each intermediate metal fixture 10 and each relay channel 35, 32A provided in the rotary cylinder part 30 is blocked, to thereby prohibit inflow of service water into the rotary cylinder part 30. When the water meter 20 is dismounted from the rotary cylinder part 30 in this state, water is not discharged from the intermediate metal fixture 10, even if the intermediate metal fixture 10 is still connected to the water pipe. Water is not discharged also from the intermediate metal fixture 10, even when the check valve 38 is dismounted. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a water meter system capable of preventing water discharge from an intermediate fitting when the water meter is removed while the intermediate fitting is connected to a water pipe.

In this type of conventional water meter system, a water meter is removably received at the center of the intermediate fitting, and a stop valve and a check valve are provided upstream and downstream of the water meter. The thing of the structure provided is known (for example, refer patent document 1).
JP 2001-21404 ([0012] to [0018], FIG. 1)

  However, in the conventional water meter system described above, there is a case where not only the water meter but also the check valve is removed from the intermediate fitting for replacement or maintenance, but the check valve is removed while the intermediate fitting is connected to the water pipe. And there was a problem that water was discharged from the intermediate bracket.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a water meter system that does not discharge water from the intermediate fitting even if the water meter and the check valve are removed while the intermediate fitting is connected to the water pipe. And

  In order to achieve the above object, a water meter system according to the invention of claim 1 is a water meter system in which a water meter is assembled to an intermediate fitting, and the intermediate fitting has a pair connected to a water pipe. A water pipe connecting portion, a meter receiving portion that removably receives a water meter, and a pair of end flow passages that pass through the pair of water pipe connecting portions and communicate with the meter receiving portion. In a water meter system that allows water to flow from one end channel through the water meter to the other end channel, the water meter system is fitted inside the meter receiving portion to receive the water meter and receive the meter. A rotating cylinder part that can be rotated between a first position and a second position with respect to the part, and a rotating cylinder part that is formed in the rotating cylinder part, and the rotating cylinder part is disposed at the first position In communication with each of the pair of end flow paths, A pair of relay flow paths that are disconnected from the pair of end flow paths in the state of being disposed at position 2, and a check valve housing that protrudes from the outer surface of the rotating cylinder and that has a through-passage through the interior. While the water meter is received inside the cylinder and the rotating cylinder part, the water meter prevents the pipe from coming into the check valve housing cylinder, while the water meter is removed from the inside of the rotating cylinder part. A check valve that can be inserted and removed from the inside of the stop valve housing cylinder, an O-ring groove formed in the opening peripheral edge of the relay flow path in the front end surface of the check valve housing cylinder, an O-ring housed in the O-ring groove, and a meter A side bulging portion in which a part of the side wall of the receiving portion is bulged outward to form a bag structure, and a check valve accommodating tube is swiveled inside, and the check valve accommodating tube among the side bulging portions And provided with a sliding surface on which the O-ring slides when the rotating cylinder portion rotates. Having the features the time.

  According to a second aspect of the present invention, in the water meter system according to the first aspect, the sliding plate is a separate component from the intermediate fitting at a portion where the tip surface of the check valve accommodating cylinder is abutted inside the laterally bulging portion. The sliding plate is formed with an arc-shaped smooth curved surface centered on the rotating shaft of the rotating cylinder portion as a sliding surface, and communicates between the end channel and the relay channel. It is characterized in that the communication hole that can be formed is formed through.

  The invention of claim 3 is the water meter system according to claim 2, wherein the sliding plate includes a cylindrical projecting portion projecting from the opening edge of the communication hole toward the inside of the water pipe connecting portion. The part is abutted against the stepped part on the inner surface of the water pipe connection part in the direction of insertion into the water pipe connection part, and penetrates the side bulge part from the outside to the inside, and the tip part projects to the outer surface of the sliding plate. It is characterized in that it is provided with an applied positioning member.

  The invention of claim 4 is characterized in that in the water meter system according to claim 3, a male screw member having a side bulging portion penetrating from the outside to the inside and having a tip portion screwed to the sliding plate is provided. Have

  According to a fifth aspect of the present invention, in the water meter system according to any one of the second to fourth aspects, the O-ring slides when the rotating cylinder portion rotates in the opening of the communication hole in the sliding plate. Thus, an O-ring detachment preventing wall for preventing detachment of the O-ring from the O-ring groove is provided.

  According to a sixth aspect of the present invention, in the water meter system according to the fifth aspect, the O-ring detachment preventing wall is passed in the rotating direction of the rotating cylinder portion, and the rotating cylinder is provided at a sliding portion with the O-ring. It has a feature in that it has an arcuate sliding surface centered on the rotation axis of the part.

  The invention according to claim 7 is characterized in that, in the water meter system according to claim 6, the sliding surface of the O-ring separation preventing wall and the sliding surface of the sliding plate are flush with each other.

  The invention of claim 8 is characterized in that, in the water meter system according to any of claims 5 to 7, the O-ring detachment preventing wall is integrally formed with the sliding plate.

  A ninth aspect of the present invention is the water meter system according to any one of the first to eighth aspects, wherein a pair of end flow paths are provided between the outer surface of the rotating tube portion and the inner surface of the meter receiving portion. Is characterized in that a pair of O-rings are provided so as to be sandwiched in the axial direction of the rotating cylinder portion.

  A tenth aspect of the present invention is the water meter system according to any one of the first to ninth aspects, wherein the water meter has a substantially cylindrical shape fitted into the inside of the rotating cylinder portion and has a measurement flow path therein. And is configured to measure the passage volume of tap water flowing through the measurement channel using ultrasonic waves, electromagnetic induction, or an impeller, and the measurement channels are separated from each other by 180 degrees on the outer peripheral surface of the water meter. And a pair of end flow paths, a pair of relay flow paths, and both openings of the measurement flow path when the rotating cylinder portion is disposed at the first position. Is characterized in that it is arranged on a coaxial line.

  The invention according to claim 11 is the water meter system according to claim 10, wherein the water meter is allowed to be inserted into and removed from the inside of the rotating cylinder part between the rotating cylinder part and the water meter. Is provided with a convex portion and a concave portion that engage with each other so that the pair of relay flow passages and both openings of the measurement flow passage communicate with each other when inserted into the rotating cylinder portion.

  The invention of claim 12 is the water meter system according to any one of claims 1 to 11, wherein the water meter system is formed between the outer peripheral surface of the rotating tube portion and the inner peripheral surface of the meter receiving portion. Communicates between the pair of end flow channels when the second cylinder is disposed at the second position, while the pair of end flow channels from the pair of end flow channels when the rotating cylinder portion is disposed at the first position. It is characterized in that it is provided with a bypass flow path that is cut off.

  The invention of claim 13 is characterized in that, in the water meter system according to any one of claims 1 to 12, the intermediate fitting is made of stainless steel.

[Inventions of Claims 1 and 2]
In the configuration of claim 1, when the rotating cylinder portion is arranged at the first position, the tap water flows into the water meter through one end channel and the relay channel, and from the water meter to the other relay channel. It flows through the channel and end channel to the downstream side of the water meter system. Thereby, the passage volume of the tap water which flows between a pair of edge part flow paths is measured with a water meter.

  On the other hand, when the rotating cylinder part is rotated and arranged at the second position, the pair of end flow paths and the pair of relay flow paths are disconnected, and tap water into the rotating cylinder part is disconnected. Inflow is prohibited. If the water meter is removed from the rotating cylinder in this state, water will not be discharged from the intermediate fitting even if the intermediate fitting remains connected to the water pipe. Also, when the water meter is removed, the opening on the base end side of the check valve housing cylinder opens to the inner surface of the rotating cylinder portion that received the water meter, so the check valve is opened from the base end side opening. Insertion / extraction becomes possible. At this time, since the opening of the front end surface of the check valve accommodating cylinder is closed by the sliding surface provided in the side bulging portion, water is not discharged from the intermediate fitting even if the check valve is pulled out.

  Thus, according to the present invention, even if the water meter and the check valve are removed while the intermediate fitting is connected to the water pipe, water is not discharged from the intermediate fitting.

  Here, the sliding surface on which the O-ring slides when the rotating cylinder portion rotates may be formed by machining on the inner surface of the wall body constituting the side bulging portion. Since the recessed part of the side bulge part must be processed, the processing work is difficult and the manufacturing efficiency of the intermediate metal fitting is poor. On the other hand, as in the invention of claim 2, a sliding plate having a sliding surface which is a separate part from the intermediate metal fitting and which is formed in advance so as to be an arc-shaped smooth curved surface, If the structure is provided in the part where the tip of the check valve accommodating cylinder is abutted in the bulging part, there is no need to process the sliding surface on the deep inner surface of the side bulging part. Manufacturing efficiency is improved.

[Invention of claim 3]
According to the invention of claim 3, the sliding plate is abutted at two locations of the stepped portion on the inner surface of the water pipe connecting portion and the positioning member penetrating the side bulging portion. The positioning accuracy is improved.

[Invention of claim 4]
According to the invention of claim 4, by tightening the male screw member from the outside of the intermediate metal fitting, the sliding plate bulges laterally while keeping the outer surface of the sliding plate and the tip of the positioning member in contact with each other. It is fixed inside the part. Thereby, the check valve housing cylinder and the sliding plate can be smoothly slid.

[Invention of claim 5]
When the rotating cylinder portion is rotated, the O-ring provided on the tip surface of the check valve accommodating cylinder slides on the sliding surface of the sliding plate and crosses the opening of the communication hole. At this time, since the O-ring detachment preventing wall formed in the opening of the communication hole holds the O-ring, the O-ring is prevented from being caught by the opening edge of the communication hole and coming off from the O-ring groove when crossing the communication hole. .

[Inventions of Claims 6 and 7]
According to the sixth and seventh aspects of the present invention, the sliding between the O-ring and the O-ring detachment preventing wall is performed smoothly.

[Invention of Claim 8]
According to the configuration of the eighth aspect, the O-ring detachment preventing wall can be provided without increasing the number of parts with respect to the one provided with the sliding plate.

[Invention of claim 9]
According to the structure of Claim 9, the force applied to the axial direction of a rotation cylinder part with the water pressure of the tap water which flowed into the meter receiving part is absorbed by the frictional force of a pair of O-rings. Thereby, the force which presses the one end part of the axial direction of a rotation cylinder part to the inner surface of an intermediate metal fitting can be weakened or eliminated, and it becomes possible to rotate a rotation cylinder part smoothly.

[Invention of Claim 10]
According to the structure of Claim 10, water can be smoothly flowed in or out of the measurement flow path of the water meter.

[Invention of Claim 11]
According to the structure of Claim 11, when a water meter is inserted in the inside of a rotation cylinder part so that a recessed part and a convex part may carry out uneven | corrugated engagement, a pair of relay flow path and both opening parts of a measurement flow path are Positioned on the coaxial line. Further, since the relative rotation between the rotating cylinder and the water meter is prohibited, the measurement channel and the pair of relay channels are always in communication. Furthermore, the rotating cylinder part can be integrally rotated by holding and turning the water meter.

[Invention of Claim 12]
According to the twelfth aspect of the present invention, in the case where the end channel and the relay channel are disconnected by setting the rotating cylinder portion to the second position, the pair of end channels are separated by the bypass channel. Can be attached and detached without water interruption. Moreover, when the rotating cylinder part is set to the first position, the bypass flow path is separated from the pair of end flow paths, so that all tap water can be passed through the water meter, Weighing can be performed accurately. In addition, since the bypass flow path is formed between the rotating cylinder part and the case receiving part, the number of parts is reduced compared to a configuration in which a pair of end flow paths are connected by a bypass pipe. Therefore, the dimensions of the water meter system can be reduced.

[Invention of Claim 13]
According to the thirteenth aspect of the present invention, corrosion and depletion of the intermediate fitting due to aging can be prevented, and the sealing performance at the contact portion with the O-ring can be maintained.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the overall structure of a water meter system 100 of the present invention. In the water meter system 100, the intermediate metal fitting 10 has a structure in which a pair of water pipe connection portions 11J and 11K are extended in opposite directions from the outer surface of the tubular meter receiving portion 11 having both ends open. Pipe connection parts 11J and 11K are connected to a water pipe (not shown). For example, the left water pipe connecting portion 11J in FIG. 1 is connected to the upstream water pipe, and the upstream end flow passage 12 penetrates the inside. Further, the opposite water pipe connecting portion 11K is connected to the downstream water pipe, and the downstream end flow passage 13 passes through the inside. The upstream end flow channel 12 and the downstream end flow channel 13 (corresponding to “a pair of end flow channels” of the present invention) extend on the same axis with the meter receiving portion 11 in between. It communicates with the inside of the receiving portion 11. The intermediate fitting 10 of the present embodiment is made of stainless steel, and is formed by casting, for example. The intermediate metal fitting 10 may be made of a metal other than stainless steel or a synthetic resin. However, if it is made of stainless steel, corrosion and wear due to aging can be prevented.

  A rotating cylinder portion 30 is received inside the meter receiving portion 11. The rotating cylinder part 30 is inserted from the lower end opening part 14B of the meter receiving part 11, for example, and is prevented from coming off inside the meter receiving part 11 by a retaining ring 36 screwed into the lower end opening part 14B. The rotating cylinder portion 30 has a water passage position (corresponding to the “first position” in the present invention) shown in FIG. 2 inside the meter receiving portion 11 and a water stop position (the “second position” in the present invention). (Corresponding to “position”). Furthermore, a water meter 20 described below is accommodated inside the rotating cylinder portion 30 so as to be integrally rotatable.

  The water meter 20 is a so-called “impeller water meter”, and includes an impeller unit 121 in a cylindrical housing 120 with one end as shown in FIG. As shown in FIG. 2, the cylindrical housing 120 has a structure in which a part of the outer peripheral surface of the cylindrical body protrudes in a stepped shape, and an outer surface protrusion 120 </ b> B (corresponding to the “convex portion” of the present invention). The outer side surface 120C is a flat surface extending in the axial direction of the water meter 20 (vertical direction in FIG. 1).

  The outer protrusion 120B is formed with an outflow hole 21B penetrating the cylindrical housing 120 in and out, and communicates with a downstream relay channel 32A (corresponding to the “relay channel” of the present invention) described later. On the other hand, an inflow hole 21A is formed at a position 180 degrees away from the outflow hole 21B in the circumferential direction of the cylindrical housing 120, and an upstream side relay channel 35 described later (corresponding to the “relay channel” of the present invention). To contact. Then, the tap water flows into the cylindrical housing 120 from the inflow hole 21A, rotates the impeller of the impeller unit 121, and flows out of the water meter 20 through the outflow hole 21B.

  Here, O-ring grooves are formed on the outer peripheral surfaces of the openings of the inflow hole 21A and the outflow hole 21B on the outer surface of the cylindrical housing 120, and O-rings 80 and 80 are fitted therein, respectively. The O-ring 80 provided at the peripheral edge of the inflow hole 21 </ b> A is crushed by the inner peripheral surface of the meter fitting cylinder 31, which will be described later, in the rotating cylinder portion 30, and is formed between the inflow hole 21 </ b> A and the upstream relay flow path 35. The connecting part is sealed. On the other hand, an O-ring 80 provided at the peripheral edge of the outflow hole 21B is crushed by a base end surface of a check valve housing cylinder 32 to be described later, and a downstream relay penetrating the inside of the check valve housing cylinder 32. The connecting portion between the flow path 32A and the outflow hole 21B is sealed. The inner region of the cylindrical housing 120 (portion in which the impeller unit 121 is accommodated) corresponds to the “measurement channel” of the present invention.

  In the water meter 20, the display unit M is screwed into the upper end opening of the cylindrical housing 120. For example, the outer peripheral edge of the display unit M is locked by a plurality of snap fits erected from the upper end of the cylindrical housing 120 and is magnetically coupled to the impeller unit 121. The accumulated volume of tap water that has passed through the inside of the water meter 20 is displayed on the display unit M.

  In order to prevent the water meter 20 inserted in the rotating cylinder part 30 from being detached, a locking groove 24 is formed on the outer peripheral surface of the cylindrical housing 120 exposed from the rotating cylinder part 30. 24 is locked with a locking fitting 16 fixed to the upper end of the intermediate fitting 10 (specifically, the meter receiving portion 11). The locking metal fitting 16 is detachable by a bolt 25, and the water meter 20 can be removed from the rotating cylinder portion 30 by removing the locking metal fitting 16. Note that if the bolt 25 is a special screw (for example, a registered trademark “Torx” screw), it is possible to prevent the locking bracket 16 from being illegally removed. The above is the description of the water meter 20, and the rotating cylinder portion 30 that has received the water meter 20 will now be described.

  As shown in FIGS. 2 and 3, the rotating cylinder portion 30 includes a resin meter fitting cylinder 31 that receives the water meter 20, and a resin reverse that protrudes laterally from the outer peripheral surface of the meter fitting cylinder 31. And a stop valve housing cylinder 32. The meter fitting cylinder 31 as a whole has a cylindrical shape with one end. As shown in FIG. 2, a portion of the meter fitting tube 31 from which the check valve housing tube 32 protrudes is an outer surface bulging portion 31 </ b> B that bulges outward, and an inner side of the outer surface bulging portion 31 </ b> B. The outer surface protrusion 120B of the water meter 20 (cylindrical housing 120) is concavo-convexly fitted (corresponding to the “concave portion” of the present invention) (see FIG. 2). As a result, the water meter 20 and the rotating cylinder part 30 cannot be rotated relative to each other (integral rotation is possible), and the upstream relay flow path 35 of the rotating cylinder part 30, the inflow hole 21A of the water meter 20, and the rotating cylinder part. 30 downstream relay flow path 32A and outflow hole 21B of water meter 20 are always in communication. Here, the inner side surface 31C (see FIG. 3) of the outer surface bulging portion 31B forms a flat surface, and is in surface contact with the outer side surface 120C (see FIG. 2) of the outer surface protrusion 120B provided in the water meter 20. ing.

  As shown in FIGS. 3 and 4, O-ring grooves 91 and 91 are formed at the upper end and lower end of the meter fitting cylinder 31 over the entire circumference, respectively, and O-rings 81 and 81 (“ Corresponding to a pair of O-rings). In addition, the outer diameter of the upper end part and lower end part in which O-rings 81 and 81 were inserted is the same diameter among the meter fitting cylinders 31.

  As shown in FIG. 1, the O-ring 81 provided at the upper end portion of the meter fitting cylinder 31 is in close contact with the inner peripheral surface of the upper end opening portion 14 </ b> A of the meter receiving portion 11. On the other hand, the O-ring 81 provided at the lower end of the meter fitting cylinder 31 is in close contact with the inner peripheral surface of the retaining ring 36 screwed into the lower end opening 14B. As a result, water leakage from between the intermediate fitting 10 (specifically, the meter receiving portion 11) and the rotating cylinder portion 30 (specifically, the meter fitting cylinder 31) is prevented. The space between the retaining ring 36 and the lower end opening 14B of the meter receiving portion 11 is also sealed by the O-ring 86.

  As shown in FIG. 3, a tubular portion attachment hole 34 that penetrates the meter fitting tube 31 inward and outward is formed through the outer surface bulging portion 31 </ b> B of the meter fitting tube 31. Further, as described above, the upstream-side relay flow path 35 that is always in communication with the inflow hole 21 </ b> A of the water meter 20 is formed in the meter fitting cylinder 31 at a position 180 degrees away from the cylinder portion mounting hole 34. .

  An O-ring groove 92 is formed in the outer peripheral surface of the meter fitting cylinder 31 at the opening periphery of the upstream relay flow path 35, and an O-ring 82 fitted in the O-ring groove 92 is in contact with the inner surface of the meter receiving portion 11. The contact portion between the upstream end channel 12 and the upstream relay channel 35 is sealed.

  As shown in FIGS. 1 and 2, an O-ring detachment preventing wall 50 is provided inside the upstream end flow channel 12. The O-ring detachment preventing wall 50 has a band plate shape and is integrally formed with a cylindrical body 51 fitted and fixed inside the water pipe connecting portion 11J. Further, the O-ring detachment preventing wall 50 crosses the inside of the upstream end flow path 12 in the rotating direction of the rotating cylinder portion 30, and the O-ring 82 slides at a portion where the rotating cylinder portion 30 slides. An arcuate sliding surface 52 around the rotation axis Q is formed.

  And when the rotation cylinder part 30 rotates in the meter receiving part 11 and crosses the opening of the upstream end flow path 12, the outer peripheral surface of the meter fitting cylinder 31 (specifically, the upstream relay flow path) The O-ring 82 attached to the peripheral edge of the opening 35 is pressed by the O-ring detachment preventing wall 50 and is prevented from detaching from the O-ring groove 92.

  Of the cylindrical body 51 in which the O-ring detachment preventing wall 50 is formed, a mesh-like strainer 51S is integrally provided at the upstream opening end. The cylindrical body 51 and the O-ring detachment prevention wall 50 may be made of synthetic resin or metal.

  As shown in FIG. 2, a bypass channel 39 is formed between the outer peripheral surface of the meter fitting cylinder 31 and the inner peripheral surface of the meter receiving portion 11. The bypass passage 39 is formed by recessing the outer peripheral surface of the meter fitting cylinder 31 in a groove shape over about a half circumference (see FIG. 4). More specifically, a bypass inlet 39A is formed in the meter fitting cylinder 31 at a position about 45 degrees away from the upstream relay flow path 35 in one circumferential direction (counterclockwise direction in FIG. 2). A bypass outlet portion 39B (see FIG. 4) is formed at a position about 45 degrees away from the downstream relay flow path 32A in one circumferential direction. The bypass passage 39 extends from the bypass inlet portion 39A so as to bypass the opening of the upstream relay passage 35 in the vertical direction, extends in the circumferential direction of the meter fitting cylinder 31, and is connected to the bypass outlet portion 39B. The above is the description of the meter fitting cylinder 31.

  A check valve 38 is assembled to the downstream relay flow path 32 </ b> A penetrating through the inside of the check valve accommodating cylinder 32 in the rotating cylinder portion 30 so that it can be inserted and removed. As shown in FIG. 3, the check valve 38 includes, for example, a mounting body 38B fixed to the inner peripheral surface of the check valve housing cylinder 32, and includes a valve body 38V that can move directly on the mounting body 38B. . The valve body 38 </ b> V is biased toward the upstream side (water meter 20 side) by the spring 38 </ b> S, and the tap water flows in the forward direction from the upstream end channel 12 to the downstream end channel 13. In this case, the valve body 38V moves directly to the downstream side while pressing and contracting the spring 38S by water pressure, and is separated from the valve seat 38A. Thereby, between the water meter 20 and the downstream end flow path 13 communicates via the downstream relay flow path 32A, and the flow of tap water is permitted. On the other hand, when the tap water flows in the reverse direction from the downstream end channel 13 to the upstream end channel 12, the valve body 38V is pressed against the valve seat 38A by the biasing force of the spring 38S. It contacts closely and the downstream edge part flow path 13 and the water meter 20 are interrupted | blocked, and the reverse flow of tap water is prevented. An O-ring 38R is fitted on the base end side outer peripheral surface of the mounting body 38B, and the space between the check valve 38 and the check valve accommodating cylinder 32 is sealed by the O-ring 38R.

  The check valve accommodating cylinder 32 has a cylindrical structure with both ends open, and is inserted and assembled into the cylinder portion mounting hole 34 from the inside of the meter fitting cylinder 31. An O-ring 85 is fitted on the outer peripheral surface of the check valve housing cylinder 32 on the proximal end side, and the space between the check valve housing cylinder 32 and the cylinder portion mounting hole 34 is sealed by the O-ring 85.

  A flange portion 32F projecting laterally is formed at the proximal end portion of the check valve accommodating cylinder 32, and this flange portion 32F is formed on the opening edge of the cylinder portion mounting hole 34 in the inner side surface 31C of the outer surface bulging portion 31B. The concave and convex stepped portion 34D is engaged with the concave and convex portions. Further, in order to prevent the check valve housing cylinder 32 from being detached and prevented from rotating with respect to the cylinder portion mounting hole 34, as shown in FIG. 1, a plurality of spiral holes are formed at equal intervals on the outer peripheral surface of the flange portion 32F. A plurality of set screws 29 and 29 (in detail, hexagon socket set screws) protruding through the meter fitting cylinder 31 and protruding into the cylinder mounting hole 34 are screwed into the spiral holes. .

  The base end surface of the check valve accommodating cylinder 32 is a flat surface substantially flush with the inner side surface 31C of the outer surface bulging portion 31B, and is in surface contact with the outer side surface 120C of the outer surface protruding portion 120B provided in the water meter 20. ing. As described above, the O-ring 80 provided on the outer side surface 120C of the outer surface protruding portion 120B is crushed by the base end surface of the check valve accommodating cylinder 32, and the communication portion between the outflow hole 21B and the downstream relay flow path 32A. Is sealed.

  Here, the outer side surface 120C of the outer surface protrusion 120B is addressed to the opening on the base end side where the check valve 38 can be inserted and removed in the check valve accommodating cylinder 32, and the check valve accommodating cylinder 32 The opening on the distal end side is narrowed to be smaller than the outer diameter of the check valve 38. Accordingly, the check valve 38 is prevented from coming off inside the check valve housing cylinder 32.

  As shown in FIG. 2, the front end surface of the check valve accommodating cylinder 32 forms an arc surface centered on the rotation axis Q of the rotation cylinder portion 30, and will be described later assembled inside the meter receiving portion 11. It is abutted against the sliding plate 60. Further, as shown in FIG. 4, an O-ring groove 93 according to the present invention is formed on the opening peripheral edge of the downstream relay flow path 32 </ b> A on the front end surface of the check valve accommodating cylinder 32, and is fitted into the O-ring groove 93. The O-ring 83 is crushed by the sliding surface 61 of the sliding plate 60 to seal the connecting portion between the downstream relay channel 32A and the downstream end channel 13. The above is the description of the check valve accommodating cylinder 32.

  Here, when the rotating cylinder part 30 is rotated in the meter receiving part 11, the O-rings 81 and 82 fitted on the outer peripheral surface of the meter fitting cylinder 31 slide on the inner side surface of the meter receiving part 11. The O-ring 83 fitted to the tip surface of the check valve accommodating cylinder 32 slides on the sliding surface 61 of the sliding plate 60. In order to smoothly rotate the rotating cylinder 30. The surfaces of these O-rings 81, 82, 83 are coated with a resin having a low friction coefficient (for example, a fluororesin, specifically “Teflon” (registered trademark)), or the O-rings 81, 82, 83 are configured. You may mix | blend the particle | grains of resin with a low friction coefficient with rubber | gum. The above is the description regarding the rotating cylinder part 30.

  By the way, the meter receiving portion 11 of the intermediate fitting 10 extends in the rotating direction of the rotating cylinder portion 30 in order to accommodate the check valve accommodating cylinder 32 protruding to the side of the rotating cylinder portion 30 in a pivotable manner. A lateral bulging portion 40 is formed. As shown in FIG. 2, the side bulging portion 40 accommodates a check valve in the peripheral wall of the meter receiving portion 11 between a water passage position (see FIG. 2) and a water stop position (see FIG. 7). According to the turning range of the tube 32, the tube 32 bulges to the side. That is, the side bulging portion 40 extends in the clockwise direction in FIG. 2 from the portion of the meter receiving portion 11 where the downstream water pipe connecting portion 11K protrudes, and is open only to the inner surface side of the meter receiving portion 11. The bag structure is made. In the side bulging portion 40, the portion where the tip end face of the check valve accommodating cylinder 32 is abutted, more specifically, a bulge located at a position laterally separated from the outer peripheral surface of the meter fitting cylinder 31. A sliding plate 60 corresponding to the “sliding plate” of the present invention is assembled to the inner side surface of the protruding rear wall 40A.

  The sliding plate 60 is made of, for example, metal or synthetic resin, and has an arc shape extending in the rotating direction of the rotating cylinder portion 30. The sliding surface 61 on which the tip end portion (O-ring 83) of the check valve accommodating cylinder 32 slides is centered on the rotation axis Q of the rotating cylinder portion 30 (the tip end surface of the check valve accommodating cylinder 32). It has a smooth arcuate curved surface (with the same curvature as). Here, the sliding surface 61 can be formed by machining (for example, milling) when the material of the sliding plate 60 is metal, and resin molding (when the material is synthetic resin). For example, it can be formed by injection molding.

  A circular communication hole 64 is formed through the portion of the sliding plate 60 that overlaps the downstream end flow path 13. An O-ring detachment prevention wall 63 is provided inside the communication hole 64. The O-ring detachment preventing wall 63 is formed integrally with the sliding plate 60 and is passed across the inside of the communication hole 64 in the rotating direction of the rotating cylinder portion 30. Due to the O-ring detachment preventing wall 63, when the rotating cylinder portion 30 is rotated, the O-ring 83 attached to the distal end surface of the check valve accommodating cylinder 32 is caught by the opening edge of the communication hole 64 and the O-ring groove. 93 is prevented from coming off. Further, the surface of the O-ring detachment prevention wall 63 on which the O-ring 83 slides is an arc-shaped sliding surface 63A centering on the rotation axis Q of the rotation cylinder portion 30, and the sliding plate 60. It is flush with the sliding surface 61. Thereby, the front-end | tip part of the non-return valve accommodation cylinder 32 can be slid smoothly with respect to the sliding plate 60. FIG.

  From the opening edge of the communication hole 64 on the outer surface of the sliding plate 60, a cylindrical tubular protruding portion 62 protrudes toward the inner side of the water pipe connecting portion 11K. The cylindrical protrusion 62 is inserted and fitted from the opening on the inner surface side of the side bulging portion 40 in the water pipe connecting portion 11K, and the distal end thereof is the inner end of the proximal end of the water pipe connecting portion 11K. It is abutted against the step portion 11D formed on the peripheral surface. The downstream end flow path 13 and the downstream relay flow path 32 </ b> A can communicate with each other through the communication hole 64 of the sliding plate 60. Here, a drainage hole 65 is formed through the cylindrical projecting portion 62, and the space between the inner side of the side bulging portion 40 and the downstream end flow path 13 is formed through the drainage hole 65. Communicate.

  An abutting wall 66 is formed at the end of the sliding plate 60 opposite to the end where the cylindrical protrusion 62 is formed. The abutting wall portion 66 protrudes from the outer surface of the sliding plate 60 toward the inner corner of the side bulging portion 40, and a positioning bolt 70 that penetrates the bulging portion inner wall 40A. (Corresponding to the “positioning member” of the present invention).

  Specifically, a screw hole 43 is formed in a portion of the bulging portion inner wall 40A facing the abutting wall portion 66, and a positioning bolt is inserted into the screw hole 43 from the outside of the bulging portion inner wall 40A. 70 is inserted and screwed together. The positioning bolt 70 protrudes inward of the side bulging portion 40 in a state where the head portion 70H hits the outer surface of the bulging portion inner wall 40A, and the tubular protruding portion 62 is connected to the water pipe. It abuts against the abutting wall portion 66 from the direction opposite to the insertion direction to the portion 11K (left direction in FIG. 2). The outer surface of the sliding plate 60 is slightly lifted from the inner surface of the bulging portion inner wall 40A by the butting of the positioning bolt 70 and the butting of the cylindrical protruding portion 62 against the stepped portion 11D, and The sliding surface 61 is positioned so as to be an arc surface centered on the rotation axis Q of the rotating cylinder portion 30. The sliding plate 60 is lifted from the inner side surface of the bulging portion inner wall 40A, so that the sliding surface 61 can be accurately adjusted even if the inner surface of the bulging portion inner wall 40A has slight irregularities formed during casting. Can be positioned.

  Here, an O-ring 71 fitted in an O-ring groove is provided on the back surface of the head portion 70H of the positioning bolt 70, and this O-ring 71 is crushed on the outer surface of the bulging portion inner wall 40A. Water leakage from the screw hole 43 is prevented.

  Further, the portion of the abutting wall portion 66 against which the positioning bolt 70 is abutted is slightly depressed, and the tip of the positioning bolt 70 enters the depressed portion. Moreover, in order to eliminate the protrusion to the exterior of the positioning bolt 70, the peripheral part of the screw hole 43 is recessed among 40 A of bulging part inner walls, and the head part 70H of the positioning bolt 70 is accommodated here. .

  As shown in FIG. 15, a fixing bolt 75 (specifically, a registered trademark “Torx” screw) corresponding to the “male screw member” of the present invention passes through the axial center portion of the positioning bolt 70. The fixing bolt 75 is screwed into the axial center portion of the positioning bolt 70 and protrudes from the front end surface of the positioning bolt 70, and the protruding portion is screwed into a spiral hole formed in the abutting wall portion 66. . Thereby, the inner surface (the inner surface of the bulging portion inner wall 40A) in which the sliding plate 60 is recessed in the state where the abutting wall portion 66 and the tip of the positioning bolt 70 are in contact with each other. It is fixed to.

  Here, an O-ring groove is formed on the front end surface of the positioning bolt 70 so as to surround the fixing bolt 75, and the O-ring 76 fitted therein is crushed by the abutting wall portion 66, and the positioning bolt 70. Water leakage from the threaded portion between 70 and the fixing bolt 75 is prevented. Further, in order to eliminate the protrusion of the fixing bolt 75 to the outside, the center of the head portion 70H of the positioning bolt 70 is depressed, and the head portion 75H is accommodated in the depressed portion.

  The fixing bolt 75 is passed through the screw hole 43 common to the positioning bolt 70, so that the trouble of separately forming the screw hole for the fixing bolt 75 in the bulging portion inner wall 40A can be saved.

  The configuration related to the water meter system 100 of the present embodiment is as described above. This water meter system 100 can be assembled as follows.

  First, the sliding plate 60 is attached to the intermediate metal fitting 10. That is, the sliding plate 60 is pushed into the bulging portion inner wall 40A side of the side bulging portion 40, the cylindrical protruding portion 62 is inserted into the water pipe connecting portion 11K, and the tip thereof is pushed into the step portion 11D. Hit it. In this state, the positioning bolt 70 is inserted into the screw hole 43 from the outside of the bulging portion inner wall 40A and is tightened with a rotating tool (not shown). Then, the head portion 70H of the positioning bolt 70 abuts against the outer surface of the bulging portion inner wall 40A, the tip of the positioning bolt 70 abuts against the abutting wall portion 66 of the sliding plate 60, and the sliding plate 60 is laterally moved. The bulging portion 40 is positioned so as to float slightly from the inner surface. In this state, the fixing bolt 75 provided in the axial center portion of the positioning bolt 70 is screwed into the spiral hole of the abutting wall portion 66 by a rotating tool (not shown). Thus, the sliding plate 60 is fixed to the inner back portion of the side bulging portion 40.

  Next, the cylindrical body 51 is inserted into the upstream water pipe connecting portion 11J so that the sliding surface 52 of the O-ring detachment preventing wall 50 is flush with the inner peripheral surface of the meter receiving portion 11, for example. Attach while visually checking.

  Next, the meter fitting cylinder 31 is assembled to the meter receiving portion 11. That is, in a state where the meter fitting tube 31 is inserted from the lower end opening 14B of the meter receiving portion 11 and the upper end portion of the meter fitting tube 31 is locked to the opening edge of the upper end opening portion 14A of the meter receiving portion 11, The retaining ring 36 is screwed into the lower end opening 14 </ b> B of the meter receiving portion 11, so that the meter fitting cylinder 31 is prevented from being detached into the meter receiving portion 11. The retaining ring 36 may be fastened to the lower end opening 14B by engaging and rotating a dedicated rotary tool (not shown) in a plurality of recesses 36A formed on the lower surface thereof.

  Here, since the side bulging portion 40 is formed in a part of the meter receiving portion 11 in the circumferential direction, the insertion of the meter fitting tube 31 into the meter receiving portion 11 is performed in the process of inserting the meter fitting tube 31. Unevenness occurs in the deformation of the O-ring 81 provided at the upper end. In order to correct this deviation, a correction groove 200 is formed on the inner peripheral surface near the upper end of the meter receiving portion 11 over the entire circumference. That is, the O-ring 81 at the upper end of the meter fitting cylinder 31 is positioned inside the correction groove 200 immediately before the upper end of the meter fitting cylinder 31 is locked to the opening edge of the upper end opening 14A of the meter receiving portion 11. The deviation of the deformation of the O-ring 81 is corrected.

  Next, the check valve accommodating cylinder 32 is inserted into the cylinder portion mounting hole 34 from the inside of the meter fitting cylinder 31, and the check valves 29 and 29 are used to check the valve with the flange portion 32F engaged with the step portion 34D. The accommodating cylinder 32 is fixed to the cylinder portion mounting hole 34. At this time, the opening on the proximal end side of the check valve accommodating cylinder 32 is open to the inside of the meter fitting cylinder 31.

  Next, the check valve 38 is inserted from the opening on the proximal end side of the check valve housing cylinder 32 opened to the inside of the meter fitting cylinder 31. When the water meter 20 is inserted from the upper end opening of the meter fitting cylinder 31, the opening edge on the base end side of the check valve housing cylinder 32 is covered with the outer surface of the water meter 20 (tubular housing 120), and the check valve 38 is retained. Finally, if the locking metal fitting 16 is locked in the locking groove 24 of the water meter 20 and the bolt 25 is tightened, the water meter system 100 is completed, and if this water meter system 100 is attached in the middle of the water pipe, The passing volume of tap water passing through the water meter 20 can be measured.

Next, operation | movement of the water meter system 100 of this embodiment is demonstrated.
When measuring the passing volume of tap water using the water meter system 100 of this embodiment, the rotating cylinder part 30 is arranged at the water passing position. Then, as shown in FIGS. 1 and 2, the upstream end flow channel 12 and the downstream end flow channel 13 of the intermediate fitting 10, the upstream relay flow channel 35 and the downstream relay flow of the rotating cylinder portion 30. The channel 32A communicates with the inflow hole 21A and the outflow hole 21B of the water meter 20. That is, tap water flows from the upstream end flow channel 12 through the water meter 20 to the downstream end flow channel 13, and the impeller is moved when passing through the water meter 20 (measurement flow channel). Rotate. At this time, between the upstream end channel 12 and the upstream relay channel 35 and between the downstream relay channel 32A and the downstream end channel 13 are sealed by O-rings 82 and 83, respectively. Since the space between the meter fitting cylinder 31 and the meter receiving portion 11 is sealed by O-rings 81, 81, tap water does not leak out of the meter receiving portion 11.

  Now, when replacing or maintaining the water meter 20 and the check valve 38, the locking fitting 16 is removed while the intermediate fitting 10 is connected to the water pipe, and the rotating cylinder portion 30 is passed from the water position to the water stop position. In this state, the water meter 20 and the check valve 38 are removed from the intermediate fitting 10. Specifically, in the water meter 20, the upper end portion exposed from the upper end opening 14 </ b> A of the meter receiving portion 11 is gripped and rotated in the clockwise direction in FIG. 2. Then, the rotating cylinder part 30 rotates inside the meter receiving part 11 integrally with the water meter 20.

  When the rotating cylinder part 30 rotates, the upstream relay channel 35 and the downstream relay channel 32A of the rotating cylinder part 30 are connected to the upstream end channel 12 and the downstream end channel 13 of the intermediate metal fitting 10, respectively. (See FIG. 6). Then, when the rotating cylinder part 30 is rotated by a predetermined angle (for example, about 45 degrees) from the water passing position and reaches the water stopping position, as shown in FIG. The opening of the downstream relay flow path 32A is closed with the sliding plate 60, and the upstream end flow path 12 and the upstream relay flow path 35 and the downstream side. The relay channel 32A and the downstream end channel 13 are disconnected. Instead, the bypass inlet portion 39A opens to the upstream end flow passage 12, and the bypass outlet portion 39B opens to the inner side of the side bulging portion 40, so that the upstream end flow passage 12 and the downstream side are opened. The end channel 13 communicates with the bypass channel 39. That is, the tap water that has flowed into the water meter system 100 from the water pipe does not flow into the inside of the rotating cylinder portion 30, but passes through the water meter system 100 through the bypass channel 39. That is, water is not cut off when the water meter 20 and the check valve 38 are attached or detached.

  In this state, as shown in FIG. 8, when the upper end portion of the water meter 20 is gripped and pulled upward, the water meter 20 can be extracted from the upper end opening of the rotating cylinder portion 30. At this time, since tap water does not flow into the inside of the rotating cylinder part 30, even if the water meter 20 is removed while the intermediate fitting 10 is connected to the water pipe, the water is not discharged from the intermediate fitting 10. Moreover, when the water meter 20 is removed, the opening on the base end side of the check valve accommodating cylinder 32 opens to the inside of the meter fitting cylinder 31, so that the check valve 38 can be inserted and removed from the opening on the base end side. it can. At this time, the opening on the distal end side of the check valve accommodating cylinder 32 is blocked by the sliding surface 61, so that the water is not discharged from the intermediate fitting 10 even if the check valve 38 is pulled out.

  In addition, although the force of an axial direction (upward or downward in FIG. 1) is given to the rotation cylinder part 30 with water pressure, the upper end part of the rotation cylinder part 30 (meter fitting cylinder 31) like this embodiment If the O-rings 81 and 81 are attached to the outer peripheral surface of the lower end portion, such an axial force can be absorbed. Thereby, the force which presses the rotation cylinder part 30 to the lower end opening part 14B side or the upper end opening 14A side of the intermediate | middle metal fitting 10 can be weakened or eliminated, and it becomes possible to rotate the rotation cylinder part 30 smoothly. . Moreover, if the outer diameter of the upper end part and lower end part to which O-rings 81 and 81 are mounted | worn is made into the same diameter among the rotation cylinder parts 30 like this embodiment, the axial direction provided to the rotation cylinder part 30 will be given. It is possible to balance the power of the two, and it is possible to rotate more smoothly.

  The case where the water meter 20 and the check valve 38 are assembled again is as follows. First, the check valve 38 is inserted from the opening on the proximal end side of the check valve housing cylinder 32, and then the water meter 20 is inserted from the upper end opening of the meter fitting cylinder 31. At this time, the water meter 20 is inserted so that the outer surface protruding portion 120 </ b> B of the water meter 20 fits inside the outer surface bulged portion 31 </ b> B of the meter fitting cylinder 31. Thereby, the upstream relay flow path 35 and the downstream relay flow path 32 </ b> A of the rotating cylinder part 30 are brought into a communication state via the water meter 20. Further, by inserting the water meter 20 into the meter fitting cylinder 31, the check valve 38 is prevented from coming off from the opening on the proximal end side of the check valve housing cylinder 32.

  Then, when the water meter 20 is rotated from the water stop position to the water passage position (counterclockwise direction in FIG. 7), the rotating cylinder portion 30 rotates inside the intermediate fitting 10 (meter receiving portion 11). It is moved back to the water passage position (state shown in FIG. 2). That is, the bypass channel 39 is disconnected from the upstream end channel 12 and the downstream end channel 13, and instead, the upstream end channel 12, the upstream relay channel 35, and the downstream relay The flow path 32 </ b> A and the downstream end flow path 13 communicate with each other, and water flow to the water meter 20 is resumed, and the water meter 20 can measure the passing volume of tap water. Thereafter, the locking metal fitting 16 is attached to the original position, locked with the locking groove 24 of the water meter 20, and fixed with the bolt 25. At this time, if the locking metal fitting 16 cannot be locked with the locking groove 24, it can be determined that the rotating cylinder part 30 has not returned to the water passing position, It is possible to prevent displacement from the water flow position.

  Here, when the rotating cylinder portion 30 is rotated between the water-water position and the water-stop position, the O-ring 82 attached to the opening peripheral edge of the upstream-side relay flow path 35 is attached to the inner surface of the meter receiving portion 11. The O-ring 83 that slides and is attached to the distal end surface of the check valve accommodating cylinder 32 slides on the sliding surface 61 of the sliding plate 60. In the process of reaching the water flow position or the water stop position, the O-ring 82 crosses the opening of the upstream end flow passage 12 formed on the inner surface of the meter receiving portion 11, and the O-ring 83 is formed on the sliding surface 61. Cross the opening of the communication hole 64 made. At this time, as shown in FIG. 6, the O-ring 82 slides on the O-ring detachment preventing wall 50 in the upstream side end flow passage 12, and the O-ring 83 contacts the O-ring detachment preventing wall 63 in the communication hole 64. Slide. That is, since the O-rings 82 and 83 are pressed by the O-ring detachment preventing walls 50 and 63 when crossing the openings of the upstream end flow path 12 and the communication hole 64, the O-rings 82 and 83 are held by the O-ring groove 92. , 93 is prevented from coming off.

  Further, when the water accumulated in the side bulging portion 40 is drawn out of the intermediate fitting 10, the fixing bolt 75 is slightly set in a state where the rotating cylinder portion 30 is in the water passing position (state shown in FIG. 2). Loosen and form a gap between the O-ring 76 provided at the tip of the positioning bolt 70 and the abutting wall 66. Then, the water in the side bulging portion 40 is gradually pulled out of the intermediate fitting 10 from the gap between the fixing bolt 75 and the positioning bolt 70 by water pressure.

  As described above, according to the present embodiment, when the rotating cylinder portion 30 is rotated and disposed at the water stop position, the end flow passages 12 and 13 provided in the intermediate fittings 10 and the rotating cylinder portion 30 are provided. Further, the connection between the relay flow paths 35 and 32A is interrupted, and the inflow of tap water into the rotating cylinder portion 30 is prohibited. If the water meter 20 is removed from the rotating cylinder part 30 in this state, water will not be discharged from the intermediate metal fitting 10 even if the intermediate metal fitting 10 remains connected to the water pipe. Moreover, when the water meter 20 is removed, the opening on the base end side of the check valve accommodating cylinder 32 opens to the inner surface side of the meter fitting cylinder 31, so that the check valve can be inserted and removed from the opening on the base end side. Of course, the water will not be discharged from the intermediate fitting 10 even if the check valve 38 is pulled out.

  By the way, the sliding surface on which the O-ring 83 provided on the front end surface of the check valve accommodating cylinder 32 slides is formed on the inner side surface of the side bulging portion 40, that is, the inner side surface of the bulging portion inner wall 40A. In the case of forming by machining (milling), a processing tool is inserted into the side bulging portion 40 from the upper end opening 14A or the lower end opening 14B of the meter receiving portion 11, or the side bulging portion. It is necessary to perform processing by inserting a processing tool from a tool insertion hole separately formed on the upper surface or the lower surface of 40. For this reason, a special processing tool is required, or processing takes a long time due to poor workability. Moreover, since the intermediate | middle metal fitting 10 is normally manufactured with the automatic manufacturing line which consists of a several process, if the process of machining a sliding surface as mentioned above is included in the automatic manufacturing line, there exists a possibility that a manufacturing line may be overdue. is there.

  On the other hand, according to the water meter system 100 of the present embodiment, the sliding surface 61 is formed on the sliding plate 60, which is a separate component from the intermediate metal fitting 10, and is previously finished into a smooth curved surface having an arc shape. Since the sliding plate 60 is assembled to the inner surface of the bulging portion inner wall 40A, as compared with the case where the inner surface of the bulging portion inner wall 40A is processed to form a sliding surface as described above, The sliding surface 61 can be easily and quickly provided in the side bulging portion 40. Moreover, since it is not necessary to process a sliding surface on the inner side surface of the bulging portion inner wall 40A, the manufacturing efficiency of the intermediate fitting 10 is improved.

  The sliding plate 60 is positioned at two locations in the longitudinal direction (specifically, both end portions), and a positioning bolt 70 penetrating the stepped portion 11D on the inner surface of the water pipe connecting portion 11K and the bulging portion inner wall 40A. Therefore, the positioning accuracy of the sliding plate 60 is improved.

  Moreover, since the side bulging portion 40 is formed only in the turning range of the check valve receiving cylinder 32 when the rotating cylinder portion 30 is rotated between the water passage position and the water stop position, Compared to the case where the bulging portion is formed on the entire circumference of the meter fitting cylinder 31, it can be made compact.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In the above embodiment, the O-ring detachment preventing walls 50 and 63 are provided. However, if the O-rings 82 and 83 are attached to the O-ring grooves 92 and 93 so as not to be detached, the O-ring detachment is not necessarily performed. The prevention walls 50 and 63 are not necessary.

  (2) In the above embodiment, the bypass passage 39 is provided, but the bypass passage 39 may not be provided.

  (3) The check valve 38 is not limited to the structure of the above embodiment. For example, a ball that floats in the downstream relay channel 32A is provided. For example, when tap water flows in the forward direction, the ball is disposed at a position away from the downstream end channel, while the tap water is reversed. When flowing in the direction, the ball may be pushed by water pressure to close the opening of the measurement flow path 21 to prevent backflow.

  (4) As shown in FIG. 9A, a plurality of O-ring detachment prevention walls 63 may be passed in parallel with each other along the rotation direction of the rotation cylinder portion 30 inside the communication hole 64. Further, as shown in FIG. 9B, an auxiliary wall 67 that intersects the O-ring detachment preventing wall 63 that is passed in the rotating direction of the rotating cylinder portion 30 may be provided. Although not shown, a plurality of O-ring detachment prevention walls 63 and a plurality of auxiliary walls 67 may intersect with each other to form a lattice shape. The O-ring detachment preventing wall 50 provided in the upstream end flow channel 12 may have the same configuration.

  (5) It is good also as a structure by which the rotation cylinder part 30 is positioned by a water flow position and a water stop position. Specifically, when the rotating cylinder part 30 is in the water passage position and the water stop position, the outer surface bulging part 31B of the check valve accommodating cylinder 32 or the meter fitting cylinder 31 is changed to the side bulging part 40. What is necessary is just to make it the structure which contact | abuts the side wall of both ends of this, and controls the further rotation.

  (6) The fixing bolt 75 may not be configured to penetrate the positioning bolt 70, and the fixing bolt 75 is provided on the side of the screw hole 43 through which the positioning bolt 70 penetrates in the bulging portion inner wall 40 </ b> A. A screw hole may be formed so as to penetrate the slide plate 60 from there.

  (7) The water meter 20 is an impeller water meter, but may be an ultrasonic or electromagnetic water meter.

  (8) Although not shown, a tool insertion hole for machining the sliding surface 61 is formed through the lower surface or upper surface of the side bulging portion 40, and a machining tool is inserted from the tool insertion hole. A sliding surface 61 may be formed by machining on the inner surface on the back side where the tip surface of the check valve accommodating cylinder 32 is abutted in the bulging portion 40. Further, the tool insertion hole may be closed in a watertight state by the lid member after the processing of the sliding surface 61 is completed. However, in this configuration, as described above, it is difficult to process the sliding surface 61, and the tool insertion hole must be separately formed after the intermediate fitting 10 is cast. Further, since the tool insertion hole is larger than the screw hole 43 formed through the side bulging portion 40 in the above embodiment, the structure for achieving watertightness becomes large compared to the above embodiment. From the above points, a configuration in which the sliding surface 61 is formed on the sliding plate 60 which is a separate part from the intermediate fitting 10 and the sliding plate 60 is assembled to the intermediate fitting 10 as in the above embodiment is preferable. .

  (9) Instead of the water meter 20 provided in the water meter system 100, a filter device (not shown) (for example, a ceramic filter, a nonwoven fabric, a mesh of a predetermined mesh, etc.) is received inside the rotating cylinder portion 30, and the filter device It is possible to remove foreign substances in the tap water by passing the water through.

  Further, instead of the water meter 20, a water leakage inspection device (not shown) (for example, a device that detects water leakage based on vibrations transmitted through the water pipe) is received inside the rotating cylinder portion 30, and the water leakage inspection device in the water pipe network is received. The presence or absence of water leakage may be inspected.

  Further, in place of the water meter 20, a water quality inspection device (for example, a pH meter, a chlorine concentration meter, etc.) is received inside the rotating cylinder portion 30, and the water quality is inspected by passing water through the water quality inspection device. It may be possible.

  (10) In the above-described embodiment, the rotating cylinder portion 30 is rotated between the water position and the water stop position by gripping and rotating the upper end portion of the water meter 20. A gear portion is formed on the outer peripheral surface of the portion 30 exposed from the upper end opening portion 14A of the intermediate fitting 10, and a flat gear or a worm gear meshed with the gear portion is rotated by a rotating tool, thereby rotating. It is good also as a structure which rotates the cylinder part 30. FIG.

  (11) A vertical rib perpendicular to the O-ring detachment preventing wall 50 is formed in the opening on the meter receiving portion 11 side in the upstream end flow path 12, and the rotating cylinder portion 30 (meter) for the meter receiving portion 11 is formed. When the fitting cylinder 31) is inserted, the O-ring 82 may be pressed against the vertical rib to prevent the O-ring 82 from being detached. Similarly, a vertical rib is provided at the end of the check valve 38 facing the outflow hole 21B of the water meter 20, and provided at the peripheral portion of the outflow hole 21B when the water meter 20 is inserted into the rotating cylinder portion 30. Alternatively, the O-ring 80 may be pressed against the vertical ribs to prevent the O-ring 80 from being detached. Further, a vertical rib is provided inside the upstream relay flow path 35 so that when the water meter 20 is inserted into the meter fitting cylinder 31, the O-ring 80 provided at the peripheral edge of the inflow hole 21A is held by the vertical rib. The O-ring 80 may be prevented from being detached.

Side sectional view of a water meter system according to an embodiment of the present invention. Plan sectional view of the water meter system in a state where the rotating cylinder part is located at the water passing position. Side sectional view of the rotating cylinder Side view of rotating cylinder Front view of O-ring detachment prevention wall provided on sliding plate Plan sectional view of the water meter system in a state where the rotating cylinder is located between the water stop position and the water passage position. Plan sectional view of the water meter system in a state where the rotating cylinder is located at the water stop position Side sectional view of the water meter system while the water meter is being extracted Front view of O-ring detachment prevention wall according to other embodiment (4)

Explanation of symbols

10 Intermediate bracket 11 Meter receiving portion 11D Stepped portion 11J, 11K Water pipe connection portion 12 Upstream end channel (end channel)
13 Downstream end channel (end channel)
20 Water meter 21 Measuring flow path 30 Rotating cylinder part 31 Meter fitting cylinder 31B Outer surface bulging part (concave part)
32 Check valve housing cylinder 32A Downstream relay flow path 35 Upstream relay flow path 38 Check valve 39 Bypass flow path 40 Side bulging part 40A Swelling part inner wall 63 O-ring detachment preventing wall 60 Sliding plate 61 Sliding Moving surface 62 Cylindrical protruding portion 63 O-ring detachment preventing wall 63A Sliding surface 65 Drain hole 64 Communication hole 70 Positioning bolt 75 Fixing bolt 83 O ring 93 O ring groove 100 Water meter system 120B External protruding portion (convex portion)

Claims (13)

A water meter system in which a water meter is assembled to an intermediate fitting, wherein the intermediate fitting includes a pair of water pipe connection portions connected to a water pipe, and a meter receiving portion that detachably receives the water meter. A pair of end passages that penetrate through the pair of water pipe connection portions and communicate with the meter receiving portion, and tap water passes through the water meter from one end passage. In the water meter system adapted to flow in the other end channel,
A rotating tube portion that is fitted inside the meter receiving portion to receive the water meter and is rotatable between a first position and a second position with respect to the meter receiving portion;
The rotating cylinder part is formed in the rotating cylinder part and communicates with the pair of end flow paths in a state where the rotating cylinder part is disposed at the first position, and the rotating cylinder part is the second cylinder part. A pair of relay flow paths that are disconnected from the pair of end flow paths in a state of being disposed at a position of
A check valve accommodating cylinder that protrudes from the outer surface of the rotating cylinder part and through which the relay channel passes,
While the water meter is received inside the rotating cylinder part, the water meter is prevented from falling into the check valve accommodating cylinder by the water meter, while the water meter is removed from the inside of the rotating cylinder part. A check valve that can be inserted and removed from the check valve housing cylinder in a state;
An O-ring groove formed in an opening peripheral edge of the relay flow channel in a front end surface of the check valve housing cylinder and an O-ring housed in the O-ring groove;
A side bulge portion in which a part of the side wall of the meter receiving portion is bulged outward to form a bag structure, and the check valve accommodating cylinder is accommodated in a swivel manner inside,
A sliding surface provided on a portion of the side bulging portion where the tip surface of the check valve accommodating cylinder is abutted and on which the O-ring slides when the rotating cylinder portion rotates; A water meter system characterized by comprising.   A sliding plate, which is a separate part from the intermediate fitting, is provided at a portion where the tip surface of the check valve accommodating cylinder is abutted inside the side bulging portion, and the sliding plate is provided with a sliding plate of the rotating cylinder portion. An arc-shaped smooth curved surface centered on the rotation axis is formed as the sliding surface, and a communication hole that allows communication between the end channel and the relay channel is formed. The water meter system according to claim 1, wherein A cylindrical projecting portion that projects from the opening edge of the communication hole out of the sliding plate toward the inside of the water pipe connecting portion,
The cylindrical protrusion is abutted against the stepped portion of the inner surface of the water pipe connection portion in the insertion direction to the water pipe connection portion,
3. The water meter system according to claim 2, further comprising a positioning member that penetrates the side bulging portion from the outside to the inside and has a leading end abutted against an outer surface of the sliding plate.   The water meter system according to claim 3, further comprising a male screw member that penetrates the side bulging portion from the outside to the inside and has a tip portion screwed into the sliding plate.   An O-ring detachment that prevents the O-ring from detaching from the O-ring groove by sliding the O-ring into the opening of the communication hole in the sliding plate when the rotating cylinder portion rotates. The water meter system according to any one of claims 2 to 4, wherein a prevention wall is provided.   The O-ring detachment preventing wall is passed in the rotating direction of the rotating cylinder part, and the arc-shaped sliding centered on the rotating axis of the rotating cylinder part at the sliding part with the O-ring The water meter system according to claim 5, further comprising a surface.   The water meter system according to claim 6, wherein a sliding surface of the O-ring separation preventing wall and a sliding surface of the sliding plate are flush with each other.   8. The water meter system according to claim 5, wherein the O-ring detachment preventing wall is integrally formed with the sliding plate.   A pair of O-rings are provided between the outer side surface of the rotating cylinder part and the inner side surface of the meter receiving part so as to sandwich the pair of end flow paths in the axial direction of the rotating cylinder part. The water meter system according to any one of claims 1 to 8, wherein the water meter system is provided. The water meter has a substantially cylindrical shape fitted inside the rotating cylinder portion and has a measurement flow path therein, and the passing volume of tap water flowing through the measurement flow path is determined by ultrasonic and electromagnetic Configured to meter using a guide or impeller,
The measurement channel has openings at positions 180 degrees apart from each other on the outer peripheral surface of the water meter,
When the rotating cylinder portion is disposed at the first position, the pair of end flow paths, the pair of relay flow paths, and both openings of the measurement flow path are on a coaxial line. The water meter system according to claim 1, wherein the water meter system is arranged.   Between the rotating cylinder part and the water meter, while allowing the water meter to be inserted into and extracted from the rotating cylinder part, when the water meter is inserted into the rotating cylinder part, The water meter system according to claim 10, further comprising a convex portion and a concave portion that are engaged so that the pair of relay flow channels and both openings of the measurement flow channel communicate with each other. The pair of end flow is formed between the outer peripheral surface of the rotating cylinder portion and the inner peripheral surface of the meter receiving portion, and the rotating cylinder portion is disposed at the second position. While communicating between the roads
The bypass flow path that is separated from the pair of end flow paths when the rotating cylinder portion is disposed at the first position is provided. Water meter system.   The water meter system according to any one of claims 1 to 12, wherein the intermediate fitting is made of stainless steel.

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