JP7105479B2 - Pressure reducing valve unit and pressure reducing valve unit set - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pressure reducing valve unit including a pressure reducing valve. The present invention also relates to a pressure reducing valve unit set for installing the pressure reducing valve unit.

In a high-rise hotel, when trying to secure the water pressure in each guest room on the top floor, the water pressure in each guest room on the lower floor becomes too high. Therefore, a pressure reducing valve is installed in the middle of the water pipe extending to each guest room as necessary, and the water pressure of each guest room on each floor is adjusted to a predetermined water pressure. Patent Literature 1 describes a pressure reducing valve used in such a case.

The pressure reducing valve of Patent Document 1 has a housing with an inflow tube, an outflow tube coaxial with the inflow tube, and an internal flow path connecting the inflow tube and the outflow tube. An annular valve seat is provided in the middle of the internal flow path. Further, the pressure reducing valve includes a diaphragm that is displaced in accordance with the pressure downstream of the valve seat in the internal flow path, and a valve body that is fixed to the diaphragm via a stem inside the housing. The valve body moves toward and away from the valve seat as the diaphragm is displaced, thereby changing the distance from the valve seat. Thereby, the pressure reducing valve adjusts the pressure of the fluid passing through the pressure reducing valve to a predetermined pressure.

In this document, the pressure reducing valve is installed between a stopcock and an elbow that constitute a pipe. The pressure reducing valve has a cap nut on the inflow pipe, and the stop cock and the pressure reducing valve are fastened with the cap nut. In addition, the elbow has a cap nut on the pipe joint portion on the side of the pressure reducing valve, and the pressure reducing valve and the elbow are fastened with the cap nut.

JP-A-2005-314982

The pressure reducing valve diaphragm is displaced each time the cabin water supply is used. Therefore, the diaphragm is frequently loaded. Thus, pressure reducing valves may fail due to diaphragm damage.

Here, when the pressure reducing valve and the piping on the upstream side of the pressure reducing valve are fastened with a cap nut, or when the pressure reducing valve and the piping on the downstream side of the pressure reducing valve are fastened with a cap nut , when replacing the pressure reducing valve, it is not easy to release these fastenings. Moreover, when the pressure reducing valve is removed from the pipe, the pipes upstream and downstream of the pressure reducing valve become unstable, so the workability of exchanging the pressure reducing valve is not good.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pressure reducing valve unit in which the pressure reducing valve can be easily replaced and a pressure reducing valve unit set including the pressure reducing valve unit.

In order to solve the above problems, the pressure reducing valve unit of the present invention includes a pressure reducing valve including an inflow pipe and an outflow pipe coaxial with the inflow pipe; A stop cock arranged on the upstream side in the flow direction of the flowing fluid, a check valve arranged on the downstream side in the pipe axis direction in the flow direction, and the stop cock and the check valve are fixed. and a base member, wherein the stop cock, the pressure reducing valve, and the check valve are arranged in succession in this order, and the pressure reducing valve is secured to the stop cock and the It is fixed detachably between the check valve.

According to the present invention, the pressure reducing valve unit can be installed instead of installing the pressure reducing valve in the middle of the pipe. Here, in the pressure reducing valve unit, the pressure reducing valve is detachable between a stop cock fixed to the base member and the check valve. Therefore, even if the pressure reducing valve is removed from the pressure reducing valve unit, the upstream piping connected to the stop cock will not become unstable, and the downstream piping connected to the check valve will become unstable. Not at all. Also, the pressure reducing valve is detachably fixed between the stop cock and the check valve by a crimp fixing mechanism. According to the crimp fixing mechanism, it is easier to release these fastenings compared to the case where the pressure reducing valve is fastened to the stop cock and the check valve using cap nuts. Therefore, replacement of the pressure reducing valve is easy. Here, since the pressure reducing valve unit is provided with a stop cock on the upstream side of the pressure reducing valve, if the stop cock is closed at the time of replacement, water from the upstream side will not splash. Further, since the pressure reducing valve unit includes a check valve downstream of the pressure reducing valve, water from the downstream side will not splash when the pressure reducing valve is removed.

In the present invention, a pipe joint connected to the downstream side of the check valve in the flow direction in the pipe axial direction is provided, and the pipe joint is curved in a direction intersecting the pipe axial direction. can. By doing so, the direction of the pipe passing through the pressure reducing valve unit can be bent.

In the present invention, the crimping fixing mechanism includes a connecting pipe extending from the valve box of the stop cock in the axial direction of the pipe, and being coaxially supported by the connecting pipe in a state of being movable in the axial direction of the pipe. and a moving pipe moving mechanism that advances and retracts the moving pipe in the direction of the pipe axis toward and away from the pressure reducing valve, wherein the moving pipe moves from the direction of the pipe axis to the It is abuttable on the inflow pipe.

In the present invention, the pressure reducing valve includes a housing having an internal flow path connecting the inflow pipe and the outflow pipe, and a flow path in one of the orthogonal directions perpendicular to the pipe axial direction in the middle of the flow direction in the internal flow path. and an annular valve seat facing the side, and a downstream channel located at a position overlapping with the valve seat when viewed in the orthogonal direction, and located downstream of the valve seat in the flow direction in the internal channel. and a diaphragm forming part of a wall surface of the portion, the diaphragm having a circular profile when viewed in the orthogonal direction, an outer peripheral edge retained by the housing, and a central portion defining the internal flow path. The base member displaces in the orthogonal direction according to the pressure of the fluid on the downstream side of the valve seat in the It can be extended in the pipe axis direction. The diaphragm of the pressure reducing valve is a large member in the radial direction so that it can be displaced in response to fluctuations in the pressure in the downstream channel portion. Therefore, if the base member is arranged radially outside the diaphragm, the size of the pressure reducing valve unit will be increased. On the other hand, if the base member is arranged in the orthogonal direction crossing the radial direction of the diaphragm, the pressure reducing valve unit can be made compact.

In the present invention, the width dimension of the stop cock, the width dimension of the check valve, and the width dimension of the base member in the width direction orthogonal to the pipe axial direction and the orthogonal direction are the same as those of the diaphragm in the housing. The width dimension is equal to or less than the width dimension of the housing portion held on the inner peripheral side, and the base member may overlap the stop cock, the check valve, and the pressure reducing valve when viewed from the orthogonal direction. . In this way, the pressure reducing valve unit can be made compact in the width direction.

In the present invention, the base member includes a mounting portion extending in the pipe axis direction to which the stop cock and the check valve are fixed, and a mounting portion extending outward from one end of the mounting portion in the pipe axis direction. and an installation portion, and the installation portion may have an installation surface perpendicular to the pipe axis at an end face opposite to the installation portion. In this way, the pressure reducing valve unit can be installed in the building by placing the installation member with the installation surface in contact with the floor surface of the building such as a hotel. In addition, the pressure reducing valve unit can be installed in a posture in which the stop cock, the pressure reducing valve, and the check valve are vertically arranged. Therefore, the installation space for the pressure reducing valve unit can be suppressed.

Next, a pressure reducing valve unit set of the present invention includes the above pressure reducing valve unit and a unit installation member for installing the pressure reducing valve unit, the unit installation member comprising a unit installation portion having an installation surface. and a unit mounting portion extending in a direction perpendicular to the mounting surface from a side of the unit mounting portion opposite to the mounting surface, wherein the pressure reducing valve unit has the base member fixed to the unit mounting portion, It is characterized in that the pipe axis direction is oriented in the extending direction of the unit mounting portion.

According to the present invention, the pressure reducing valve unit can be installed by installing the unit installation member with the installation surface in contact with the floor surface of a building such as a hotel and fixing the pressure reducing valve unit to the unit mounting portion. Alternatively, the pressure reducing valve unit can be installed by fixing the pressure reducing valve unit to the unit mounting portion and installing the unit mounting portion on the building. Therefore, installation of the pressure reducing valve unit is easy. Moreover, in a state where the pressure reducing valve unit is installed, the stop cock, the pressure reducing valve and the check valve are vertically arranged. Therefore, the installation space for the pressure reducing valve unit can be suppressed.

In the present invention, the base member is fixed to the unit mounting portion by a screw fixing mechanism, and the screw fixing mechanism includes a through portion provided in the base member, a hole portion provided in the unit mounting portion, and the a bolt having a shaft portion extending through the through portion and the hole; A nut sandwiched between the head of the bolt may be provided. In this way, it is easy to fix the pressure reducing valve unit to the unit installation member.

In the present invention, it is preferable that the hole portion is an elongated hole extending in the extending direction of the unit mounting portion. With this configuration, the fixing position of the pressure reducing valve unit by the screw fixing mechanism can be moved within the range of the long hole.

In the present invention, when the pressure reducing valve unit is fixed to the unit installation member, the width dimension of the stop cock, the width dimension of the check valve, the width dimension of the check valve, and the The width dimension of the base member and the width dimension of the unit mounting portion are equal to or less than the width dimension of the housing portion that holds the diaphragm on the inner peripheral side of the housing, and the unit mounting portion is viewed from the orthogonal direction. In this case, the stop cock, the check valve, the pressure reducing valve, and the base member can be overlapped. With this configuration, when the unit mounting member is installed with the pressure reducing valve unit fixed to the unit mounting member, the space occupied by the pressure reducing valve unit and the unit mounting member can be reduced.

In the present invention, the first pressure reducing valve unit has a first pressure reducing valve unit, a second pressure reducing valve unit, and a unit installation member for installing the first pressure reducing valve unit and the second pressure reducing valve unit. and the second pressure reducing valve unit are the pressure reducing valve units described above, and the unit installation member includes a unit installation portion having an installation surface, and the installation surface of the unit installation portion opposite to the installation surface. a unit mounting portion extending in a vertical direction, the first pressure reducing valve unit having the base member fixed to the unit mounting portion such that the pipe axial direction of the first pressure reducing valve unit extends to the unit mounting portion; In the extending direction, the second pressure reducing valve unit is configured such that the base member is fixed to the unit mounting portion at a position different from that of the first pressure reducing valve unit in the extending direction. The direction of the pipe axis can be oriented in the extending direction of the unit mounting portion. In this way, the two pressure reducing valve units can be installed in a state of being arranged in the pipe axis direction, so the installation space for these units can be reduced.

In the present invention, the first pressure reducing valve unit has a first pressure reducing valve unit, a second pressure reducing valve unit, and a unit installation member for installing the first pressure reducing valve unit and the second pressure reducing valve unit. and the second pressure reducing valve unit are the pressure reducing valve units described above, and the unit installation member includes a unit installation portion having an installation surface, and the installation surface of the unit installation portion opposite to the installation surface. a unit mounting portion extending in a vertical direction, the unit mounting portion comprising: a first mounting plate portion extending from the unit mounting portion in a direction perpendicular to the mounting surface; a second mounting plate portion extending from the unit installation portion along the first mounting plate portion, the end on the first mounting plate portion side being continuous with the first mounting plate portion; The thickness direction of the plate portion and the thickness direction of the second mounting plate portion intersect, and the first pressure reducing valve unit is configured such that the base member is fixed to the first mounting plate portion to form the first pressure reducing valve. The pipe axis direction of the unit is oriented in the extending direction of the unit mounting portion, and the second pressure reducing valve unit is configured such that the base member is fixed to the second mounting plate portion so that the second pressure reducing valve unit of the second pressure reducing valve unit The direction of the tube axis can be oriented in the extending direction of the unit mounting portion. With this configuration, the first pressure reducing valve unit and the second pressure reducing valve unit are fixed to the first mounting plate portion and the second mounting plate portion facing in mutually intersecting directions. Therefore, when two pressure reducing valve units are installed in parallel, the space occupied by them can be reduced.

In the pressure reducing valve unit of the present invention, the pressure reducing valve is detachable between the stop cock fixed to the base member and the check valve. Therefore, even if the pressure reducing valve is removed from the pressure reducing valve unit, the upstream piping connected to the stop cock will not become unstable, and the downstream piping connected to the check valve will become unstable. Not at all. Also, the pressure reducing valve is detachably fixed between the stop cock and the check valve by a crimp fixing mechanism. According to the crimp fixing mechanism, attachment and detachment of the pressure reducing valve is easy. Furthermore, since the pressure reducing valve unit is provided with a stopcock upstream of the pressure reducing valve, if the stopcock is closed during replacement, water from the upstream side will not splash. Further, since the pressure reducing valve unit includes a check valve downstream of the pressure reducing valve, water from the downstream side will not splash when the pressure reducing valve is removed.

Further, according to the pressure reducing valve unit set of the present invention, the pressure reducing valve unit is fixed to the unit mounting portion by installing the unit installation member with the installation surface in contact with the floor surface of a building such as a hotel. A valve unit can be installed. Alternatively, the pressure reducing valve unit can be installed by fixing the pressure reducing valve unit to the unit mounting portion and installing the unit mounting portion on the building. Therefore, installation of the pressure reducing valve unit is easy. Moreover, in a state where the pressure reducing valve unit is installed, the stop cock, the pressure reducing valve and the check valve are vertically arranged. Therefore, the installation space for the pressure reducing valve unit can be suppressed.

It is a side view of a pressure-reduction valve unit set. It is explanatory drawing of a unit installation member. It is a cross-sectional view of a pressure reducing valve unit. FIG. 10 is an explanatory diagram of a pressure reducing valve unit set of Modification 1; FIG. 11 is an explanatory diagram of a pressure reducing valve unit set of Modification 2; It is explanatory drawing of the pressure-reduction-valve unit of a modification. It is an explanation of the base member of the pressure reducing valve unit of the modified example.

A pressure reducing valve unit set and a pressure reducing valve unit according to embodiments of the present invention will be described below with reference to the drawings.

(Reducing valve unit set)
FIG. 1(a) is a side view of the pressure reducing valve unit set as viewed from the pressure reducing valve unit side. FIG. 1(b) is a side view of the pressure reducing valve unit set viewed from a direction perpendicular to FIG. 1(a). A pressure reducing valve unit set 1 includes a pressure reducing valve unit 3 having a pressure reducing valve 2 and a unit installation member 4 for installing the pressure reducing valve unit 3 .

The pressure reducing valve unit set 1 is used in a high-rise hotel to install a pressure reducing valve unit 3 in the middle of the pipe of the water supply system that supplies water to the tap of each guest room. That is, the water supply system of a high-rise hotel has a main pipe (not shown) that delivers water to each floor, and a plurality of branch pipes 6 that branch off from the main pipe on each floor and extend toward each guest room. In such a water supply system, if it is attempted to secure the water pressure from the taps of the guest rooms on the top floor, the taps of the guest rooms on the lower floors will have too high a water pressure. Therefore, a pressure reducing valve unit 3 is installed in the middle of each branch pipe 6 on each floor to adjust the water pressure of the tap water in each guest room to a predetermined pressure.

(unit installation member)
FIG. 2 is an explanatory diagram of the unit installation member. As shown in FIGS. 2A and 2B, the unit installation member 4 includes a unit installation portion 11 having an installation surface 11a and an installation surface 11a from the opposite side of the unit installation portion 11 to the installation surface 11a. and a unit mounting portion 12 extending in a vertical direction. As shown in FIG. 2(c), the unit installation portion 11 is plate-shaped and has a substantially square planar shape. The unit attachment portion 12 protrudes from the central portion of the unit installation portion 11 . Notch portions 14 are provided on the edges of the four sides of the unit installation portion 11 . When fixing the unit installation part 11 to the floor surface of each floor of the high-rise hotel, the installation surface 11a is brought into contact with the floor surface. Moreover, the notch 14 is made to penetrate the anchor which protrudes from the floor surface of each floor. Then, the unit installation portion 11 and the anchor are welded or fastened with a nut. When the unit installation portion 11 is installed on the floor surface, the unit attachment portion 12 extends upward from the floor surface.

The unit mounting portion 12 includes a first mounting plate portion 15 extending with a constant width in a direction perpendicular to the installation surface 11a, and a second mounting plate portion 15 extending along the first mounting plate portion 15 with a constant width in a direction perpendicular to the installation surface 11a. a plate portion 16; The end of the first mounting plate portion 15 on the second mounting plate portion 16 side and the end of the second mounting plate portion 16 on the first mounting plate portion 15 side are continuous, and the thickness of the first mounting plate portion 15 is The direction W1 and the thickness direction W2 of the second mounting plate portion 16 are orthogonal. Therefore, the shape of the unit attachment portion 12 when viewed from the extending direction U perpendicular to the installation surface 11a is an L shape. As shown in FIG. 2A, the first mounting plate portion 15 is provided with a first hole portion 17 and a second hole portion 18 at positions spaced apart in the extending direction U. As shown in FIG. Each of the two first hole portions 17 and the second hole portions 18 is an elongated hole extending in the extending direction U. As shown in FIG.

(Reducing valve unit)
FIG. 3 is a cross-sectional view of the pressure reducing valve unit. The pressure reducing valve unit 3 comprises a pressure reducing valve 2 having an inflow pipe 21 and an outflow pipe 22 coaxial with the inflow pipe 21 . In addition, the pressure reducing valve unit 3 includes a stop cock 24 arranged upstream in the direction S of the flow of the fluid flowing through the pressure reducing valve 2 in the X direction along the pipe axis L of the inflow pipe 21 and the outflow pipe 22; It has a check valve 25 arranged downstream in the flow direction S, and a base member 26 to which the stop cock 24 and the check valve 25 are fixed. The base member 26 is located on one side of the stop cock 24 , the pressure reducing valve 2 and the check valve 25 . The pressure reducing valve 2 is detachably fixed between the stop cock 24 and the check valve 25 by a crimp fixing mechanism 27 . As a result, the stopcock 24 is connected to the inflow pipe 21 of the pressure reducing valve 2 and the check valve 25 is connected to the outflow pipe 22 of the pressure reducing valve 2 . Furthermore, the pressure reducing valve unit 3 comprises a pipe joint 28 connected to the check valve 25 . The pipe joint 28 is curved in a direction intersecting with the pipe axis direction X. As shown in FIG. In this example, fitting 28 is an elbow. Water flows through the stopcock 24, the pressure reducing valve 2, the check valve 25, and the pipe joint 28 in this order.

Here, in the following description, the direction along the pipe axis L of the inflow pipe 21 and the outflow pipe 22 of the pressure reducing valve 2 is defined as the pipe axis direction X of the pressure reducing valve unit 3 . The side on which the stop cock 24 is located in the pipe axis direction X is defined as the X1 direction. The side on which the check valve 25 is located in the pipe axis direction X is defined as the X2 direction. The direction perpendicular to the pipe axial direction X is defined as the perpendicular direction Y of the pressure reducing valve unit 3 , and the direction perpendicular to the pipe axial direction X and the perpendicular direction Y is defined as the width direction Z of the pressure reducing valve unit 3 . The orthogonal direction Y is the direction in which the pressure reducing valve 2 and the base member 26 face each other. In the orthogonal direction Y, one side where the base member 26 is positioned is the Y1 direction, and the other side where the pressure reducing valve 2 is positioned is the Y2 direction. When the pressure reducing valve unit 3 is attached to the unit installation portion 11, the pipe axial direction X and the extension direction U of the unit installation portion 12 are the same.

(Pressure reducing valve)
The pressure reducing valve 2 comprises a housing 34 having an internal channel 31 connecting the inflow pipe 21 and the outflow pipe 22 . As shown in FIG. 3, the internal channel 31 has a channel portion 31a extending in the orthogonal direction Y. As shown in FIG. An annular valve seat 32 facing in the Y1 direction is provided in the middle of the flow path portion 31a. The pressure reducing valve 2 also has a diaphragm 33 that constitutes part of the wall surface of a downstream channel portion 31b that is located downstream of the valve seat 32 in the flow direction S in the internal channel 31 .

The diaphragm 33 is arranged at a position overlapping the valve seat 32 when viewed in the orthogonal direction Y. As shown in FIG. As indicated by the dashed line in FIG. 1A, the diaphragm 33 has a circular contour when viewed in the orthogonal direction Y, and the outer peripheral edge is held by the housing 34 . Further, as shown in FIG. 3, the diaphragm 33 is supported at a predetermined position in the orthogonal direction Y by the coil spring 30 arranged inside the housing 34 . The diaphragm 33 is displaced in the orthogonal direction Y at its central portion according to the pressure of the fluid in the downstream channel portion 31b. Here, as shown in FIG. 1(a), in the pressure reducing valve 2, when viewed in the orthogonal direction Y, the width of the housing portion 34a that holds the diaphragm 33 on the inner peripheral side of the housing 34 is the widest.

The pressure reducing valve 2 also includes a stem 35 fixed to the central portion of the diaphragm 33 and extending in the Y1 direction. The stem 35 passes through the valve seat 32 via an upstream channel portion 31c located upstream in the flow direction S of the valve seat 32 in the internal channel 31, and its tip end is the upstream channel portion. 31c is reached. A valve body 36 is fixed to the tip of the stem 35 (the end opposite to the diaphragm 33 ). The valve body 36 has an annular shape. The valve body 36 is located in the downstream channel portion 31b and faces the valve seat 32 from the Y1 direction side.

When the central portion of the diaphragm 33 is displaced in the orthogonal direction Y according to the pressure of the fluid in the downstream channel portion 31b, the stem 35 is displaced in the orthogonal direction Y along with the displacement of the diaphragm 33 . As a result, the valve body 36 is displaced toward and away from the valve seat 32 to change the distance from the valve seat 32 . That is, the check valve 25 changes the opening degree of the valve according to the displacement of the diaphragm 33 . Thereby, the pressure reducing valve 2 adjusts the pressure of the water passing through the pressure reducing valve 2 to a predetermined pressure.

(water stop valve)
The stop cock 24 is a ball stop cock in this example. As shown in FIG. 3 , the stopcock 24 includes a ball valve body 41 , a valve box 43 , and a handle 42 for rotating the ball valve body 41 . The ball valve element 41 is housed in a valve chamber 44 defined inside the valve box 43 . The valve box 43 has a stop cock fixing portion 45 fixed to the base member 26 at the end portion in the Y1 direction.

The handle 42 has a shaft portion 42a extending in the orthogonal direction Y. As shown in FIG. The Y1-direction end of the shaft portion 42a is fixed to the ball valve element 41, and the Y2-direction end protrudes from the valve casing 43 in the Y2 direction. A knob portion 42b is provided at the end portion of the shaft portion 42a in the Y2 direction. The stop cock fixing portion 45 has a cylindrical shape and protrudes from the valve box 43 in the direction opposite to the handle 42 . The stop cock fixing portion 45 has a male thread 45a on its outer peripheral surface.

The stop cock 24 also includes a first connecting pipe 46 projecting from the valve box 43 in the X1 direction, and a second connecting pipe 47 extending from the valve box 43 in the X2 direction. Further, the water stop valve 24 includes a movable pipe 48 supported by the second connecting pipe 47 in a state of being movable in the pipe axial direction X, and a direction in which the movable pipe 48 approaches and separates from the pressure reducing valve 2 in the pipe axial direction X. and a moving tube moving mechanism 40 that advances and retreats in the direction to move. The moving tube moving mechanism 40 includes an operating ring 49 supported on the outer peripheral side of the second connecting tube 47 in a state that it can rotate about the tube axis L and cannot move in the tube axis direction X. As shown in FIG. The moving pipe 48 is supported coaxially with the second connecting pipe 47 on the outer peripheral side of the second connecting pipe 47 . An O-ring 50 is interposed between the second connecting pipe 47 and the moving pipe 48 in the radial direction. The moving tube moving mechanism 40 also includes a female thread 49 a provided on the inner peripheral surface of the operating ring 49 and a male thread 48 b provided on the outer peripheral surface of the moving tube 48 . The male thread 48 b is screwed into the female thread 49 a of the operating ring 49 . Therefore, by rotating the operating ring 49 around the tube axis L, the moving tube 48 moves in the first direction X1 or the second direction X2 of the tube axis direction X. As shown in FIG.

The moving tube 48 has an annular recess 51 on an annular end face 48a in the X2 direction. The inner diameter dimension of the recess 51 is larger than the outer dimension of the end of the inflow pipe 21 of the pressure reducing valve 2 in the X1 direction. An annular groove 52 is provided on the annular bottom surface of the recess 51 facing in the X2 direction. An annular gasket 53 is mounted in the annular groove 52 . The bottom surface of the recessed portion 51 and the gasket 53 are crimped portions with which the end surface of the inflow pipe 21 of the pressure reducing valve 2 abuts. Further, the moving tube 48 includes a receiving portion 54 projecting in the X2 direction from a portion of the annular end surface 48a in the circumferential direction. The receiving portion 54 protrudes from the angular position at which the base member 26 is located on the annular end face 48a. The receiving portion 54 has a circular shape and supports the inflow pipe 21 of the pressure reducing valve 2 from the Y1 direction side (the base member 26 side).

(Check valve)
The check valve 25 includes a check valve main body 61 and a valve box 63 that defines a valve chamber 62 that houses the check valve main body 61 . The check valve 25 also includes a first connecting pipe 64 extending from the valve box 63 in the X1 direction, and a second connecting pipe 65 extending from the valve box 63 in the X2 direction. The valve box 63 has a check valve fixing portion 66 fixed to the base member 26 at the end portion in the Y1 direction.

The check valve fixing portion 66 protrudes from the valve box 63 in the Y1 direction. The check valve fixing portion 66 has a cylindrical shape and has a male thread 66a on its outer peripheral surface. The first connecting pipe 64 is detachably attached to the valve box 63 . Here, when the first connecting pipe 64 is removed from the valve box 63, the valve chamber 62 is opened in the X1 direction, and the check valve main body 61 can be replaced.

The first connecting pipe 64 has an annular concave portion 67 on an annular end surface 64a in the X1 direction. The inner diameter dimension of the recess 67 is larger than the outer dimension of the end of the outflow pipe 22 of the pressure reducing valve 2 in the X2 direction. An annular groove 68 is provided in the annular bottom surface of the recess 67 facing in the X1 direction. An annular gasket 69 is mounted in the annular groove 68 . The bottom surface of the recess 67 and the gasket 69 are crimped portions with which the end surface of the outflow pipe 22 of the pressure reducing valve 2 abuts. The first connection pipe 64 also includes a receiving portion 70 that protrudes in the X1 direction from a portion of the annular end surface 64a in the circumferential direction. The receiving portion 70 protrudes from the angular position at which the base member 26 is located on the annular end surface 64a. The receiving portion 70 has a circular shape and supports the outflow pipe 22 of the pressure reducing valve 2 from the Y1 direction side (the base member 26 side).

Here, the second connecting pipe 47 of the stop cock 24, the moving pipe 48, the moving pipe moving mechanism 40 (the operation ring 49, the internal thread 49a of the operation ring 49, the external thread 45a of the moving pipe 48), the gasket 69, and the reverse The first connecting pipe 64 and the gasket 69 of the stop valve 25 constitute a crimping fixing mechanism 27 that detachably connects the pressure reducing valve 2 between the stop cock 24 and the check valve 25 .

The check valve 25 also has a cap nut 71 at the tip of the second connection pipe 65 . The cap nut 71 is rotatably supported by the second connection pipe 65 . Here, the pipe joint 28 is connected to the second connecting pipe 65 of the check valve 25 using a cap nut 71 .

(base member)
Next, the base member 26 extends in the pipe axial direction X on the Y1 direction side of the stop cock 24, the pressure reducing valve 2, and the check valve 25. As shown in FIG. As shown in FIG. 1A, the width dimension of the base member 26 in the width direction Z is equal to or less than the width dimension of the housing portion 34a that holds the diaphragm 33 on the inner peripheral side of the pressure reducing valve 2. As shown in FIG. The base member 26 includes a stop cock mounting portion 73 positioned at an end portion in the X1 direction, a check valve mounting portion 74 positioned at an end portion in the X2 direction, and a stop cock mounting portion 73 extending in the pipe axis direction X. and a connection portion 72 that connects the check valve attachment portion 74 with the check valve attachment portion 74 . The stop cock attachment portion 73 and the check valve attachment portion 74 protrude in the Y2 direction from the connection portion 72 . The stop cock mounting portion 73 and the check valve mounting portion 74 are provided with a through hole 73a and a through hole 74a passing through in the orthogonal direction Y, respectively. The stop cock 24 is fixed to the stop cock mounting portion 73 by inserting the stop cock fixing portion 45 into the through hole 73 a and screwing the male screw 45 a of the stop cock fixing portion 45 to the nut 75 . The check valve 25 is fixed to the check valve mounting portion 74 by inserting the check valve fixing portion 66 into the through hole 74 a and screwing the male screw 66 a of the check valve fixing portion 66 to the nut 76 . When the stop cock 24, the pressure reducing valve 2, and the check valve 25 are fixed to the base member 26 and viewed from the orthogonal direction Y, the base member 26, the water stop cock 24, the pressure reducing valve 2, and the check valve 25 are The stop valve 25 overlaps.

The base member 26 also includes a first fixed plate portion 77 that protrudes in the X1 direction from the Y1 direction edge of the stop valve mounting portion 73, and a check valve mounting portion 74 that protrudes in the X2 direction from the Y1 direction end edge. A second fixing plate portion 78 is provided. A first notch portion 77a (penetrating portion) for bolt fixing is provided on the edge of the first fixing plate portion 77 in the X1 direction. A second notch portion 78a (penetrating portion) for bolt fixing is provided on the edge of the second fixing plate portion 78 in the X2 direction. Note that the first notch portion 77a and the second notch portion 78a may be through holes.

(Fixing the pressure reducing valve unit to the unit installation part)
The pressure reducing valve unit 3 is fixed to the unit mounting portion 12 by a screw fixing mechanism 81 . The screw fixing mechanism 81 includes a first cutout portion 77a and a second cutout portion 78a provided in the base member 26, and a first hole portion 17 and a second hole portion 18 provided in the unit mounting portion 12. . Further, the screw fixing mechanism 81 includes a first bolt 82 extending through the first notch portion 77a and the first hole portion 17, and a second bolt extending through the second notch portion 78a and the second hole portion 18. 83 , a first nut 84 screwed onto the first bolt 82 and a second nut 85 screwed onto the second bolt 83 . The first nut 84 sandwiches the opening edge of the first cutout portion 77a in the base member 26 and the opening edge of the first hole portion 17 in the unit mounting portion 12 between the head portion of the first bolt 82 to reduce pressure. The valve unit 3 is fixed to the unit installation member 4 . The second nut 85 sandwiches the opening edge of the second notch portion 78a in the base member 26 and the opening edge of the second hole portion 18 in the unit mounting portion 12 between the head portion of the second bolt 83 to reduce pressure. The valve unit 3 is fixed to the unit installation member 4 .

Here, when the pressure reducing valve unit 3 is attached to the unit installation member 4, the pipe axis direction X of the pressure reducing valve unit 3 and the extension direction U of the unit attachment portion 12 match. In addition, when viewed from the orthogonal direction Y, the unit mounting portion 12 overlaps the stop cock 24 , the check valve 25 , the pressure reducing valve 2 , and the base member 26 .

(Installation of the pressure reducing valve unit and replacement of the pressure reducing valve)
When installing the pressure reducing valve unit 3, first, as shown in FIG. 1, the unit installation member 4 is installed on the floor of the building. After that, the screw fixing mechanism 81 fixes the pressure reducing valve unit 3 to the unit installation portion 11 . Here, in the screw fixing mechanism 81 , the first hole portion 17 and the second hole portion 18 provided in the unit installation portion 11 are long holes extending in the extending direction U of the unit attachment portion 12 . Therefore, when fixing the pressure reducing valve unit 3, the fixing position can be adjusted by moving it vertically within the range of the long hole.

When the pressure reducing valve unit 3 is fixed to the unit installation member 4 installed on the floor of the building, the pipe axis direction X of the pressure reducing valve unit 3 is the vertical direction, and the stop cock 24, the pressure reducing valve 2, the check valve 25, and the The pipe joints 28 are arranged vertically in this order.

Next, the branch pipe 6 is connected to the first connection pipe 46 of the stop cock 24 . That is, the stop cock 24 is connected to the upstream pipe portion 85 located upstream of the pressure reducing valve unit 3 in the branch pipe 6 . In addition, the second connecting pipe 47 of the check valve 25 is connected to the downstream pipe portion 86 located downstream of the pressure reducing valve unit 3 in the branch pipe 6 .

Alternatively, the pressure reducing valve unit 3 may be fixed to the unit installation member 4 in advance, and the unit installation member 4 to which the pressure reducing valve unit 3 is fixed may be installed on the floor of the building.

Here, when the pressure reducing valve unit 3 is installed in a high-rise hotel and used, the diaphragm 33 of the pressure reducing valve 2 is displaced each time the tap water in the guest room is used. Therefore, the diaphragm 33 is frequently loaded. Therefore, the pressure reducing valve 2 may fail due to damage to the diaphragm 33 .

In such a case, first, the stop cock 24 is operated to stop water from flowing into the pressure reducing valve 2 from the upstream pipe portion 85 . Next, the operation ring 49 of the stopcock 24 is rotated to move the moving pipe 48 away from the pressure reducing valve 2 in the X1 direction. As a result, the fixation of the pressure reducing valve 2 by the crimp fixing mechanism 27 is released, and the pressure reducing valve 2 is removed from between the stop cock 24 and the check valve 25 .

After that, a new pressure reducing valve 2 is arranged between the stop cock 24 and the check valve 25 and supported by the receiving portion 54 of the stop cock 24 and the receiving portion 70 of the check valve 25 . After that, the operation ring 49 of the water shutoff valve 24 is rotated to move the moving pipe 48 in the X2 direction to approach the check valve 25 . As a result, the pressure reducing valve 2 is crimped and fixed between the stop cock 24 and the check valve 25 . After that, the stop cock 24 is operated. As a result, water flows from the upstream piping portion 85 to the downstream piping portion 86 via the pressure reducing valve unit 3 .

(Effect)
According to this example, instead of installing the pressure reducing valve 2 in the middle of the branch pipe 6, the pressure reducing valve unit 3 can be installed. When installing the pressure reducing valve unit 3 , the unit installation portion 11 may be installed on the floor of the building, and the pressure reducing valve unit 3 may be fixed to the unit mounting portion 12 . Therefore, installation of the pressure reducing valve unit 3 is easy. Furthermore, in the state where the pressure reducing valve unit 3 is installed, the stop cock 24, the pressure reducing valve 2 and the check valve 25 are vertically arranged. Therefore, the installation space for the pressure reducing valve unit 3 can be suppressed.

Further, in this example, the pressure reducing valve unit 3 is fixed to the unit installation portion 11 by the screw fixing mechanism 81 . Therefore, it is easy to fix the pressure reducing valve unit 3 to the unit mounting portion 12 .

Furthermore, the first hole portion 17 and the second hole portion 18 of the unit installation member 4 are long holes extending in the extension direction U (pipe axis direction X) of the unit attachment portion 12 . Therefore, the fixing position for fixing the pressure reducing valve unit 3 to the unit installation member 4 can be moved within the range of the long holes (the first hole portion 17 and the second hole portion 18).

Here, in the pressure reducing valve unit 3, the pressure reducing valve 2 has a stop cock 24 fixed to a base member 26.
and the check valve 25 can be attached and detached. Further, the pressure reducing valve unit 3 is fixed to a unit installation portion 11 installed on the floor of the building. Therefore, even if the pressure reducing valve 2 is removed from the pressure reducing valve unit 3, the upstream pipe portion 85 to which the stop cock 24 is connected will not become unstable, and the downstream pipe portion to which the check valve 25 is connected will not become unstable. 86 will not become unstable. Therefore, workability when exchanging the pressure reducing valve 2 is improved.

The pressure reducing valve 2 is detachably fixed between the stop cock 24 and the check valve 25 by a crimp fixing mechanism 27 . According to the crimp fixing mechanism 27, it is easier to release these fastenings compared to the case where the pressure reducing valve 2 is fastened to the stop cock 24 and the check valve 25 using cap nuts. Further, according to the crimping fixing mechanism 27, it is easier to fasten them compared to the case where the pressure reducing valve 2 is fastened to the stop cock 24 and the check valve 25 using a cap nut. That is, in this example, the pressure reducing valve 2 can be attached and detached by rotating the operating ring 49 . Therefore, replacement of the pressure reducing valve 2 is easy. In addition, the configuration of the crimping fixing mechanism is not limited to the above example.

Here, since the pressure reducing valve unit 3 has the stop cock 24 on the upstream side of the pressure reducing valve 2, if the stop cock 24 is closed when the pressure reducing valve 2 is replaced, water from the upstream side will not splash. Further, since the pressure reducing valve unit 3 includes the check valve 25 downstream of the pressure reducing valve 2, water from the downstream side will not splash when the pressure reducing valve 2 is removed.

In addition, in this example, a pipe joint 28 connected to the downstream side of the check valve 25 in the flow direction S is provided. Therefore, the direction of the branch pipe 6 passing through the pressure reducing valve unit 3 can be bent. This makes it easy to lay the downstream pipe portion 86 downstream of the pressure reducing valve unit 3 in the direction along the floor surface of the building.

Furthermore, in this example, in the pressure reducing valve unit 3 , the base member 26 extends in the pipe axial direction X in the Y1 direction of the perpendicular direction Y of the stop cock 24 , the pressure reducing valve 2 and the check valve 25 . Here, the diaphragm 33 of the pressure reducing valve 2 is a large member that expands in the radial direction, and expands in the pipe axial direction X and the width direction Z. As shown in FIG. Therefore, if the base member 26 is positioned in the orthogonal direction Y perpendicular to the tube axis direction X and the width direction Z, the base member 26 can be prevented from being positioned at the outer peripheral edge of the diaphragm 33 . Therefore, the pressure reducing valve unit 3 becomes compact.

Further, in this example, the width dimension of the stop cock 24, the width dimension of the check valve 25, and the width dimension of the base member 26 are equal to or less than the width dimension of the housing portion 34a that holds the diaphragm 33 on the inner peripheral side of the housing 34. is. In addition, as shown in FIG. 1(a), the base member 26 overlaps the stop cock 24, the check valve 25, and the pressure reducing valve 2. As shown in FIG. Therefore, the pressure reducing valve unit 3 can be made compact.

Furthermore, in this example, when the pressure reducing valve unit 3 is fixed to the unit installation portion 11, the width dimension of the stop cock 24, the width dimension of the check valve 25, the width dimension of the base member 26, and the unit installation portion 12 is equal to or smaller than the width of the housing portion 34a that holds the diaphragm 33 on the inner peripheral side of the housing 34. As shown in FIG. As shown in FIG. 1(a), when viewed in the orthogonal direction Y, the unit mounting portion 12 overlaps the stop cock 24, the check valve 25, the pressure reducing valve 2, and the base member . Therefore, when the unit installation member 4 is installed with the pressure reducing valve unit 3 fixed to the unit installation member 4, the space occupied by the pressure reducing valve unit 3 and the unit installation member 4 can be reduced.

(Other embodiments)
FIG. 4 is an explanatory diagram of a pressure reducing valve unit set according to Modification 1. FIG. FIG. 5 is an explanatory diagram of a pressure reducing valve unit set of Modification 2. FIG. Note that the pressure reducing valve unit set 1A of Modification 1 and Modification 2
The pressure reducing valve unit set 1B has a configuration corresponding to that of the pressure reducing valve unit set 1 described above.

The pressure reducing valve unit set 1A has a first pressure reducing valve unit 3A, a second pressure reducing valve unit 3B, and a unit installation portion 11 for installing the first pressure reducing valve unit 3A and the second pressure reducing valve unit 3B.

As shown in FIG. The first pressure reducing valve unit 3A and the second pressure reducing valve unit 3B are the same as the pressure reducing valve unit 3 described above. The unit installation portion 11 includes a unit installation portion 11 having an installation surface 11a, and a unit mounting portion 12 extending from the opposite side of the installation surface 11a of the unit installation portion 11 in a direction perpendicular to the installation surface 11a. The screw fixing mechanism 81 includes a first hole portion 17 , a second hole portion 18 , a third hole portion 87 and a fourth hole portion 88 in the unit mounting portion 12 . The first hole portion 17 , the second hole portion 18 , the third hole portion 87 , and the fourth hole portion 88 are provided in this order from the bottom to the top in the extending direction U of the unit mounting portion 12 . Each of the first hole portion 17, the second hole portion 18, the third hole portion 87, and the fourth hole portion 88 is an elongated hole extending in the extending direction U. As shown in FIG.

The first pressure reducing valve unit 3A is fixed to the unit mounting portion 12 using the first hole portion 17 and the second hole portion 18 of the screw fixing mechanism 81 . The second pressure reducing valve unit 3B is fixed to the unit mounting portion 12 using the third hole portion 87 and the fourth hole portion 88 of the screw fixing mechanism 81 . As a result, the base member 26 of the first pressure reducing valve unit 3</b>A is fixed to the unit mounting portion 12 , and the pipe axis direction X is oriented in the extending direction U of the unit mounting portion 12 . In the second pressure reducing valve unit 3B, the base member 26 is fixed to the unit mounting portion 12 at a position different from that of the first pressure reducing valve unit 3A in the extending direction U, and the pipe axial direction X is fixed to the extending direction of the unit mounting portion 12. Turn to U.

According to this example, the two pressure reducing valve units 3 can be installed in a state of being arranged in the pipe axis direction X, so the installation space for these can be reduced.

Next, the pressure reducing valve unit set 1B of Modification 2 includes a first pressure reducing valve unit 3A and a second pressure reducing valve unit 3B, and a unit installation portion for installing the first pressure reducing valve unit 3A and the second pressure reducing valve unit 3B. 11 and. As shown in FIG. 5, in this example, the first pressure reducing valve unit 3A is fixed to the first mounting plate portion 15 of the unit mounting portion 12 of the unit mounting portion 11, and the second pressure reducing valve unit is fixed to the second mounting plate portion 16. 3B is fixed.

That is, in this example, the screw fixing mechanism 81 includes the first hole portion 17 and the second hole portion 18 in the first mounting plate portion 15 , and the third hole portion 87 and the fourth hole portion in the second mounting plate portion 16 . A portion 88 is provided. The first hole portion 17 and the second hole portion 18 are arranged in the extending direction U in the first mounting plate portion 15 . The third hole portion 87 and the fourth hole portion 88 are arranged in the extending direction U in the second mounting plate portion 16 . Each of the first hole portion 17, the second hole portion 18, the third hole portion 87, and the fourth hole portion 88 is an elongated hole extending in the extending direction U. As shown in FIG.

The first pressure reducing valve unit 3A is fixed to the first mounting plate portion 15 using the first hole portion 17 and the second hole portion 18 of the screw fixing mechanism 81 . As a result, the base member 26 of the first pressure reducing valve unit 3</b>A is fixed to the unit mounting portion 12 , and the pipe axis direction X is oriented in the extending direction U of the unit mounting portion 12 . The second pressure reducing valve unit 3B is fixed to the second mounting plate portion 16 using the third hole portion 87 and the fourth hole portion 88 of the screw fixing mechanism 81 . As a result, the base member 26 of the second pressure reducing valve unit 3B is fixed to the unit mounting portion 12, and the pipe axis direction X is oriented in the extending direction U of the unit mounting portion 12. As shown in FIG.

According to this example, the first pressure reducing valve unit 3A and the second pressure reducing valve unit 3B are fixed to the first mounting plate portion 15 and the second mounting plate portion 16 facing in mutually intersecting directions. Therefore, when two pressure reducing valve units 3 are installed in parallel, the space occupied by them can be reduced.

(Another example of pressure reducing valve unit)
FIG. 6 is an explanatory diagram of a pressure reducing valve unit of a modified example. FIG. 7 is an explanation of the base member of the pressure reducing valve unit of the modified example. As shown in FIG. 6, the pressure reducing valve unit 3C of this example includes a stop cock 24, a pressure reducing valve 2, and a check valve 25 along the pipe axis direction X in this order. The pressure reducing valve 2 is detachably fixed between the stop cock 24 and the check valve 25 by a crimp fixing mechanism 27 . Furthermore, the pressure reducing valve unit 3</b>C includes a pipe joint 28 connected to the check valve 25 . The pressure reducing valve unit 3C also includes a base member 26 to which the stop cock 24 and the check valve 25 are fixed. Water flows through the stopcock 24, the pressure reducing valve 2, the check valve 25, and the pipe joint 28 in this order. Since the pressure reducing valve unit 3C of this embodiment has a structure corresponding to that of the pressure reducing valve unit 3, the corresponding structures are denoted by the same reference numerals, and the description thereof will be omitted.

In this example, the base member 26 also serves as the unit installation member 4 in the pressure reducing valve unit set 1 described above. That is, the base member 26 includes a mounting portion 91 extending in the pipe axis direction X to which the stop cock 24 and the check valve 25 are fixed, a mounting portion 92 extending outward from the end of the mounting portion 91 in the X2 direction, Prepare. The installation portion 92 has an installation surface 92a perpendicular to the tube axis L at the end surface opposite to the mounting portion 91 .

More specifically, the base member 26 of the pressure reducing valve unit 3C includes an installation portion 92 having an installation surface 92a, and an attachment portion extending from the opposite side of the installation surface 92a of the installation portion 92 in a direction perpendicular to the installation surface 92a. 91 and. The mounting portion 91 extends in the pipe axial direction X of the pressure reducing valve 2 on one side of the stop cock 24 , the pressure reducing valve 2 , the check valve 25 , and the pipe joint 28 .

As shown in FIG. 7, the installation portion 92 is plate-shaped and has a substantially square planar shape. The attachment portion 91 protrudes from the central portion of the installation portion 92 . Notch portions 14 are provided at the edges of four sides of the installation portion 92 . When fixing the installation portion 92 to the floor surface of each floor of the high-rise hotel, the installation surface 92a is brought into contact with the floor surface. Moreover, the notch 14 is made to penetrate the anchor which protrudes from the floor surface of each floor. Then, the installation portion 92 and the anchor are welded or fastened with a nut. When the installation portion 92 is installed on the floor surface, the attachment portion 91 extends upward from the floor surface.

The mounting portion 91 includes a mounting plate portion 94 extending with a constant width in the pipe axis direction X, and a first side plate portion 95 extending in the pipe axis direction X along the mounting plate portion 94 on one side of the mounting plate portion 94 in the width direction Z. Prepare. The first side plate portion 95 protrudes in a direction orthogonal to the mounting plate portion 94 from one edge of the mounting plate portion 94 in the width direction Z. As shown in FIG. The mounting portion 91 also includes a second side plate portion 96 extending in the tube axis direction X along the mounting plate portion 94 on the other side in the width direction Z of the mounting plate portion 94 . The second side plate portion 96 protrudes from the edge of the mounting plate portion 94 on the other side in the width direction Z in a direction perpendicular to the mounting plate portion 94 and faces the first side plate portion 95 . Therefore, the shape of the attachment portion 91 when viewed from the extending direction U perpendicular to the installation surface 92a is a U-shape.

The mounting plate portion 94 has a protruding portion 97 protruding in the Y2 direction in the middle of the tube axial direction X. As shown in FIG. The protruding portion 97 includes a first bending plate portion 98 bent and extending in the Y2 direction, a base plate portion 99 extending in the X2 direction from the end of the bending plate portion in the Y2 direction, and an end portion of the base plate portion 99 in the X2 direction. and a second bending plate portion 100 bending and extending in the Y1 direction. The pedestal plate portion 99 includes a stop cock fixing portion 101 for fixing the stop cock 24 at the end portion in the X1 direction. The base plate portion 99 also has a check valve fixing portion 102 for fixing the check valve 25 at the end portion in the X1 direction. The stop cock fixing portion 101 and the check valve fixing portion 102 are holes provided in the base plate portion 99 . Further, the base plate portion 99 has an opening 103 between the stop cock fixing portion 101 and the check valve fixing portion 102 in the pipe axis direction X. As shown in FIG.

The pressure reducing valve 2, the check valve 25, and the pipe joint 28 have the same configuration as the pressure reducing valve unit 3 described above.

The stop cock 24 includes a first connecting pipe 46 projecting from the valve box 63 in the X1 direction, and a second connecting pipe 47 extending from the valve box 63 in the X2 direction. The second connection pipe 47 includes an extension pipe 104 extending from the valve box 63 and a connecting pipe 106 coaxially connected to the extension pipe 104 in the X2 direction via a cap nut 105 .

Further, the water stop cock 24 includes a movable pipe 107 supported on the inner peripheral side of the second connection pipe 47 (connection pipe 106) in a state of being movable in the pipe axial direction X. As shown in FIG. The moving pipe 107 protrudes from the second connecting pipe 47 at its end portion in the X2 direction (on the pressure reducing valve 2 side). An O-ring 50 is interposed between the second connecting pipe 47 and the moving pipe 107 in the radial direction. The stopcock 24 also includes a moving tube moving mechanism 40 that moves the moving tube 107 forward and backward in the axial direction X of the pressure reducing valve 2 toward and away from the pressure reducing valve 2 . The moving tube moving mechanism 40 includes an operating portion 108 projecting outward from the end portion of the moving tube 107 in the X2 direction, a female thread 106 a provided on the inner peripheral surface of the connecting tube 106 , and an outer peripheral surface of the moving tube 107 . and an external thread 107a that is threadedly engaged with the internal thread 106a. Therefore, by rotating the operating portion 108 around the tube axis L, the moving tube 107 moves to one side or the other side in the tube axis direction X. As shown in FIG.

Here, the connection pipe 106 of the second connection pipe 47 is provided with the stop cock fixing portion 45 . The stop cock fixing portion 45 protrudes from the connecting pipe 106 in the Y2 direction. The stop cock fixing portion 45 has a cylindrical shape and has a male thread 45a on its outer peripheral surface.

The moving tube 107 has an annular recess 111 on an annular end face 107b in the X2 direction. The inner diameter dimension of the recess 111 is larger than the outer dimension of the end of the inflow pipe 21 of the pressure reducing valve 2 in the X1 direction. An annular groove 112 is provided on the annular bottom surface of the recess 111 facing in the X2 direction. An annular gasket 113 is mounted in the annular groove 112 . The bottom surface of the concave portion 111 and the gasket 113 are crimped portions with which the end surface of the inflow pipe 21 of the pressure reducing valve 2 abuts.

Here, the second connecting pipe 47 of the stop cock 24, the moving pipe 107, the moving pipe moving mechanism 40 (the operation part 108, the female thread 49a of the second connecting pipe 47, the external thread 107a of the moving pipe 107), the gasket 113, and , the first connecting pipe 64 and the gasket 69 of the check valve 25 constitute a crimping fixing mechanism 27 that detachably connects the pressure reducing valve 2 between the stop cock 24 and the check valve 25 .

The stop cock 24 is fixed to the base member 26 by inserting the stop cock fixing portion 45 into the stop cock fixing portion 101 of the base member 26 and screwing the stop cock fixing portion 45 into the nut. The check valve fixing portion 66 of the check valve 25 is inserted into the check valve fixing portion 102 of the base member 26 , and the check valve 25 is fixed to the base member 26 by a nut screwed onto the check valve fixing portion 66 . Also, the pressure reducing valve 2 is fixed between the stop cock 24 and the check valve 25 by a crimp fixing mechanism 27 .

Here, the opening 103 of the mounting plate portion 94 receives the Y1 side end portion of the housing 34 of the pressure reducing valve 2 . Further, the opening 103 of the mounting plate portion 94 can receive the outer peripheral portion of the operation portion 108 when the operation portion 108 is moved around the pipe axis L to move the moving pipe 107 of the stop cock 24. is.

According to this example, the base member 26 of the pressure reducing valve unit 3C includes the installation portion 92 having the installation surface 92a perpendicular to the pipe axis direction X. As shown in FIG. Therefore, the pressure reducing valve unit 3C can be installed in a building by installing the installation portion 92 with the installation surface 92a in contact with the floor surface of a building such as a high-rise hotel. In addition, the pressure reducing valve 2 can be installed with the stop cock 24, the pressure reducing valve 2 and the check valve 25 arranged vertically. Therefore, the installation space for the pressure reducing valve 2 can be suppressed.

1, 1A, 1B... pressure reducing valve unit set, 2... pressure reducing valve, 3, 3A, 3B, 3C... pressure reducing valve unit, 4... unit installation member, 6... branch pipe, 11... unit installation portion, 11a... installation surface, DESCRIPTION OF SYMBOLS 12... Unit attachment part 14... Notch part 15... 1st attachment plate part 16... 2nd attachment plate part 17... 1st hole part 18... 2nd hole part 21... Inflow pipe 22... Outflow Pipe 24 Stopcock 25 Check valve 26 Base member 27 Crimping fixing mechanism 28 Pipe joint 30 Coil spring 31 Internal flow path 31a Flow path portion 31b Downstream side Flow path part 31c...Upstream flow path part 32...Valve seat 33...Diaphragm 34...Housing 34a...Housing part 35...Stem 36...Valve element 40...Moving tube moving mechanism 41...Ball valve Body 42 Handle 42a Shaft 42b Knob 43 Valve box 44 Valve chamber 45 Stop cock fixing part 46 Stop cock first connection pipe 47 Stop cock Second connecting pipe 48 Moving pipe 48a Annular end face 48b Male screw 49 Operation ring 49a Female screw 50 O-ring 51 Concave portion 52 Annular groove 53 Gasket 54 Receiving part 61 Check valve main body 62 Valve chamber 63 Valve box 64 First connecting pipe of check valve 64 a Annular end surface 65 Second connecting pipe of check valve 66 Check valve fixing part 67... Recessed part 68... Annular groove 69... Gasket 70... Receiving part 71... Cap nut 72... Connection part 73... Stop cock mounting part 73a... Through hole 74... Reverse Stop valve mounting portion 74a Through hole 75, 76 Nut 77 First fixing plate portion 77a First notch portion 78 Second fixing plate portion 78a Second notch portion 81 Screw fixing mechanism 82...First bolt 83...Second bolt 84...First nut 85...Second nut 85...Upstream side pipe portion 86...Downstream side pipe portion 87...Third hole portion 88 Fourth hole portion 91 Mounting portion 92 Mounting portion 92a Mounting surface 94 Mounting plate portion 95 First side plate portion 96 Second side plate portion 97 Protruding portion 98 First Bending plate portion 99 Base plate portion 100 Second bending plate portion 101 Stop cock fixing portion 102 Check valve fixing portion 103 Opening 104 Extension pipe 105 Cap nut DESCRIPTION OF SYMBOLS 106... Connecting pipe, 107... Moving pipe, 107b... Annular end surface, 108... Operation part, 111... Recessed part, 112... Annular groove, 113... Gasket

Claims (12)

a pressure reducing valve comprising an inflow tube and an outflow tube coaxial with the inflow tube;
a stopcock disposed upstream in the flow direction of the fluid flowing through the pressure reducing valve in the tube axial direction of the inflow pipe and the outflow pipe;
a check valve disposed downstream in the flow direction in the pipe axial direction;
a base member to which the stop cock and the check valve are fixed;
The water stop cock, the pressure reducing valve, and the check valve are arranged continuously in this order,
A pressure reducing valve unit, wherein the pressure reducing valve is detachably fixed between the stop cock and the check valve by a crimp fixing mechanism. a pipe joint connected to the downstream side of the check valve in the direction of flow in the direction of the pipe axis;
2. The pressure reducing valve unit according to claim 1, wherein the pipe joint is curved in a direction intersecting with the pipe axial direction. The crimping fixing mechanism includes a connecting pipe extending from the valve box of the stop cock in the axial direction of the pipe, and being coaxially supported by the connecting pipe in a state of being movable in the axial direction of the pipe and moving in communication with the connecting pipe. a pipe, and a moving pipe moving mechanism that advances and retracts the moving pipe in a direction toward and away from the pressure reducing valve in the axial direction of the pipe,
3. The pressure reducing valve unit according to claim 1, wherein the moving pipe can come into contact with the inflow pipe from the pipe axis direction. The pressure reducing valve includes a housing having an internal flow path connecting the inflow pipe and the outflow pipe, and an annular and a wall surface of a downstream channel portion that is arranged at a position overlapping with the valve seat when viewed in the orthogonal direction and located downstream of the valve seat in the flow direction in the internal channel. a diaphragm forming part of
The diaphragm has a circular contour when viewed in the orthogonal direction, has an outer peripheral edge held by the housing, and has a central portion that is responsive to fluid pressure downstream of the valve seat in the internal flow path. Displaced in the orthogonal direction,
4. Any one of claims 1 to 3, wherein the base member extends in the pipe axial direction on one side of the stop cock, the pressure reducing valve, and the check valve in the orthogonal direction. The pressure reducing valve unit described in the paragraph. In the width direction orthogonal to the pipe axis direction and the orthogonal direction, the width dimension of the stop cock, the width dimension of the check valve, and the width dimension of the base member are set so that the diaphragm is located on the inner peripheral side of the housing. is less than or equal to the width dimension of the housing portion to be held,
5. The pressure reducing valve unit according to claim 4, wherein the base member overlaps the stop cock, the check valve, and the pressure reducing valve when viewed from the orthogonal direction. The base member includes: a mounting portion extending in the pipe axis direction to which the stop cock and the check valve are fixed; and an installation portion extending outward from one end of the mounting portion in the pipe axis direction; with
The pressure reducing valve unit according to any one of claims 1 to 5, wherein the installation portion has an installation surface perpendicular to the pipe axis at an end surface opposite to the mounting portion. . a pressure reducing valve unit according to claim 4;
a unit installation member for installing the pressure reducing valve unit;
The unit installation member includes a unit installation portion having an installation surface, and a unit installation portion extending in a direction perpendicular to the installation surface from a side of the unit installation portion opposite to the installation surface,
A pressure reducing valve unit set, wherein the base member of the pressure reducing valve unit is fixed to the unit mounting portion, and the pipe axis direction is oriented in the extending direction of the unit mounting portion. The base member is fixed to the unit mounting portion by a screw fixing mechanism,
The screw fixing mechanism includes a through portion provided in the base member, a hole provided in the unit mounting portion, a bolt having a shaft portion extending through the through portion and the hole portion, and a bolt having a shaft portion extending through the through portion and the hole portion. 8. A nut that is screwed together to sandwich the opening edge of the through portion in the base and the opening edge of the hole in the unit mounting portion between the head of the bolt. The described pressure reducing valve unit set. 9. The pressure reducing valve unit set according to claim 8, wherein the hole portion is an elongated hole extending in the extending direction of the unit mounting portion. In a state where the pressure reducing valve unit is fixed to the unit installation member, the width dimension of the stop cock, the width dimension of the check valve, and the width of the base member in the width direction orthogonal to the pipe axis direction and the orthogonal direction The dimensions and the width dimension of the unit mounting portion are equal to or less than the width dimension of the housing portion that holds the diaphragm on the inner peripheral side of the housing,
10. Any one of claims 7 to 9, wherein the unit mounting portion overlaps the stop cock, the check valve, the pressure reducing valve, and the base member when viewed from the orthogonal direction. The pressure reducing valve unit set according to any one of the items. a first pressure reducing valve unit and a second pressure reducing valve unit;
a unit installation member for installing the first pressure reducing valve unit and the second pressure reducing valve unit;
The first pressure reducing valve unit and the second pressure reducing valve unit are pressure reducing valve units according to any one of claims 1 to 5,
The unit installation member includes a unit installation portion having an installation surface, and a unit installation portion extending in a direction perpendicular to the installation surface from a side of the unit installation portion opposite to the installation surface,
The first pressure reducing valve unit is configured such that the base member is fixed to the unit mounting portion and the pipe axis direction of the first pressure reducing valve unit is oriented in the extending direction of the unit mounting portion,
In the second pressure reducing valve unit, the base member is fixed to the unit mounting portion at a position different from that of the first pressure reducing valve unit in the extension direction, and the pipe axial direction of the second pressure reducing valve unit is oriented to the unit. A pressure reducing valve unit set characterized in that it is oriented in the extending direction of the mounting portion. a first pressure reducing valve unit and a second pressure reducing valve unit;
a unit installation member for installing the first pressure reducing valve unit and the second pressure reducing valve unit;
The first pressure reducing valve unit and the second pressure reducing valve unit are pressure reducing valve units according to any one of claims 1 to 5,
The unit installation member includes a unit installation portion having an installation surface, and a unit installation portion extending in a direction perpendicular to the installation surface from a side of the unit installation portion opposite to the installation surface,
The unit mounting portion includes: a first mounting plate portion extending from the unit mounting portion in a direction perpendicular to the mounting surface; a second mounting plate portion extending such that an end on the side of the first mounting plate portion is continuous with the first mounting plate portion;
the thickness direction of the first mounting plate portion and the thickness direction of the second mounting plate portion intersect,
In the first pressure reducing valve unit, the base member is fixed to the first mounting plate portion and the pipe axis direction of the first pressure reducing valve unit is oriented in the extending direction of the unit mounting portion,
The second pressure reducing valve unit is characterized in that the base member is fixed to the second mounting plate portion and the pipe axis direction of the second pressure reducing valve unit is oriented in the extending direction of the unit mounting portion. valve unit set.

Images