JP4481227B2 - Pressure reducing valve - Google Patents

Description

  The present invention relates to a pressure reducing valve, and in particular, is interposed between a primary side water supply pipe and a water supply device such as a secondary side water tap, and controls the secondary side water supply pressure to be constant. It relates to a pressure reducing valve.

  Generally, tap water is distributed to a number of water distribution areas from the water distribution pipes (water pipes laid by the Waterworks Bureau for water supply), and then passes through the water supply pipes of tap water users in each distribution area. Supplied from a faucet (faucet). Here, the supply pressure of the tap water supplied from the distribution pipe to the supply pipe may become high. For example, when there is a certain level difference in the topography in the distribution area, the water supply pressure may be high where the altitude is low, and the water supply pressure may be excessive.

  Further, the water distribution pressure of the water distribution pipe is guaranteed to be 1.5 kgf / cm 2 (0.147 MPa) as a minimum secured level. However, this assumes a house with about 2 to 3 wooden floors, and with this water distribution pressure, it is not possible to supply water to a building higher than that with direct pressure (water pressure as it is). . Therefore, there is a case where high-pressure water supply having a pressure higher than the normal water distribution pressure is performed in a distribution area or a part of the water supply area having such a high building. Furthermore, when water is supplied to a high building such as a high-rise house, if the normal water distribution pressure is insufficient, the water supply is pressurized by using pressure means such as a pressure tank, elevated tank, and accumulator tank. In some cases, the water supply pressure is increased by installing a pressure-increasing line pump called a booster in the distribution pipe or the water supply pipe.

  However, if the supply pressure of tap water supplied to each user is high, the supply pressure for water supply equipment such as water taps and faucet parts will become excessive, and the water supply equipment will become fatigued or damaged early. And may have a short life. Alternatively, when the water flow in the water supply pipe is suddenly obstructed, such as when the water tap is closed, the water pressure to the pipe line etc. is suddenly changed by the kinetic energy and causes an impact. ) May occur. In addition, when using household water purifiers or household water conditioners, etc., it is preferable to protect them from excessive water pressure, and to maintain stable water purification performance, keep the water pressure constant. It is preferable to do.

  Therefore, in the case of excessive water pressure as described above, a water pressure reducing valve is provided in the middle of the water supply pipe (for example, a stop cock connection part) so that excessive water pressure is not applied to the watering equipment. There is. For example, a water pressure reducing valve reduces the water supply pressure or adjusts the flow rate by obstructing the water flow in the pipe or giving a loss to the water flow.

Conventionally, as this type of technology, for example, there is a technology described in Patent Document 1.
JP 61-191736 A

  Patent Document 1 discloses a water supply composite valve that functions as a pressure reducing valve. This composite valve for water supply is provided with a valve seat inside a main body connected to a water pipe, and a valve body that receives upstream pressure is disposed so as to be seated on the valve seat, and downstream of a stem that passes through the inside of the main body. A piston for receiving pressure is provided, and the valve element is movably attached to the stem by pressing it with a spring in the closing direction, and between a rotation-adjustable adjusting screw for closing the piston accommodating chamber of the main body and the piston A pressure regulating spring is interposed.

  However, the compound valve for water supply described in Patent Document 1 has a structure in which the upstream pipe and the downstream pipe are connected to a pair of plugs, respectively, so that the entire structure becomes relatively large and complicated, The piping work in the case of installing in the middle of a water supply pipe (for example, the connection part of a stop cock) becomes complicated.

  In particular, the compound valve for water supply described in Patent Document 1 does not correspond to an angle-type water stop cock for water pipes and cannot be used for such a water stop cock. In addition, simply attaching a pressure reducing valve to such a stop cock cannot provide the original stop function of the stop cock.

  Therefore, the present invention can be reduced in size and size as a whole, and when attached to a stop cock such as an angle stop cock of a water supply pipe, the faucet upper part (handle) of the stop cock is removed to remove water. Provide a pressure reducing valve that can be easily and quickly attached to a stop cock by simply replacing it with the top of the stop, allows piping work to be performed easily, and also provides a water stop function. Let it be an issue.

The pressure reducing valve according to claim 1 is an inflow side connection port connected to a primary side of a water supply pipe path, and a faucet upper connection port arranged facing the axial direction of the inflow side connection port, An outflow side connection port disposed in a direction intersecting with a line connecting the inflow side connection port and the faucet upper connection port, connected to the secondary side of the piping path, the inflow side connection port, and the outflow A valve seat arranged in a water flow path between the side connection port and a top attached to the faucet upper connection port, and a top received from the faucet upper connection port. A pressure reducing valve used by connecting to the faucet upper connection port of a water faucet comprising a water faucet upper portion that is watertightly closed with the valve seat seated on the valve seat. A valve body having a primary pressure chamber and a secondary pressure chamber communicating with each other; and a primary pressure chamber provided in the valve body. A water pressure control means for controlling the water pressure in the secondary pressure chamber, a connection portion provided in the valve body, and having a substantially annular shape that is watertightly connectable to a faucet upper connection port of the stop cock; and the valve body When the connection portion is connected in a watertight manner to the faucet upper connection port of the stop cock, the inside of the faucet upper connection port of the stop cock is formed. Inserted in the axial direction and seated on the valve seat of the stop cock in a watertight manner, and through the valve seat of the stop cock, the primary side pressure chamber is connected to the inlet side connection port of the stop cock. While forming the inflow path which connects, the outflow path which connects the said secondary side pressure chamber with the outflow side connection port of the said stop cock is formed between the outer peripheral surface and the inner peripheral surface side of the said connection part The flow path forming member is disposed between the inflow path and the outflow path of the flow path forming member and opens between the inflow path and the outflow path. Position and a movable water stopping means between a blocking position for blocking the watertight, the flow path forming member, focused placing the inlet passage and said outlet channel at its base end side, the valve body Further includes a substantially cylindrical water stop chamber that houses the water stop means, and a substantially cylindrical water pressure control chamber as the primary pressure chamber that houses the water pressure control means, and the water pressure control chamber. The secondary pressure chamber is disposed adjacent to the downstream side of the outside, and the inflow is converged and arranged on the base end side of the flow path forming member by the water stop chamber, the water pressure control chamber, and the secondary pressure chamber. A flowing water path extending from the inflow path to the outflow path was formed in a circular shape between the path and the outflow path.

The pressure reducing valve according to claim 2 is an inflow side connection port connected to a primary side of a water supply pipe path, and a faucet upper connection port disposed facing the axial direction of the inflow side connection port, An outflow side connection port that is disposed in a direction intersecting with a line connecting the inflow side connection port and the faucet upper connection port, and is connected to the secondary side of the piping path, the inflow side connection port, and the outflow A valve seat arranged in a water flow path between the side connection port and a top attached to the faucet upper connection port, and a top received from the faucet upper connection port. A pressure reducing valve used by connecting to the faucet upper connection port of a water faucet comprising a water faucet upper portion that is watertightly closed with the valve seat seated on the valve seat. A valve body having a primary pressure chamber and a secondary pressure chamber communicating with each other; and a primary pressure chamber provided in the valve body. A water pressure control means for controlling the water pressure in the secondary pressure chamber, a connection portion provided in the valve body, and having a substantially annular shape that is watertightly connectable to a faucet upper connection port of the stop cock; and the valve body When the connection portion is connected in a watertight manner to the faucet upper connection port of the stop cock, the inside of the faucet upper connection port of the stop cock is formed. Inserted in the axial direction and seated on the valve seat of the stop cock in a watertight manner, and through the valve seat of the stop cock, the primary side pressure chamber is connected to the inlet side connection port of the stop cock. While forming the inflow path which connects, the outflow path which connects the said secondary side pressure chamber with the outflow side connection port of the said stop cock is formed between the outer peripheral surface and the inner peripheral surface side of the said connection part The flow path forming member is disposed between the inflow path and the outflow path of the flow path forming member and opens between the inflow path and the outflow path. And a movable water stopping means between a blocking position for blocking the position and watertight, shape and dimensions of the distal end surface of the tubular flow path forming member is substantially coincident with the seating surface of the valve seat of the stop cock And at least part of a reduced portion that decreases in size from the distal end side toward the proximal end side, and the inner peripheral surface of the connection portion on the proximal end side from the reduced portion of the flow path forming member The part corresponding to the above forms the outflow path between the inner peripheral surface of the connection part.

  According to a third aspect of the present invention, there is provided the pressure reducing valve according to the second aspect, wherein the opening of the front end surface of the flow path forming member has a substantially circular shape, and a radial one side portion of the length direction part on the front end side is the center. While forming a substantially tapered peripheral wall and inclining toward the taper part where the other side portion in the radial direction forms a substantially semi-cylindrical peripheral wall, on the proximal side from a part in the length direction on the distal end side This portion is a partition portion that forms a substantially semi-cylindrical peripheral wall of substantially the same cross section that is continuous with the substantially semi-cylindrical peripheral wall of the other side portion in the radial direction, and the opening on the base end side is substantially semicircular. The

  According to a fourth aspect of the present invention, there is provided the pressure reducing valve according to the third aspect, wherein a portion of the flow path forming member on the tip side from a part in the length direction is a substantially cylindrical circumferential portion, and the flow path forming member is When it is inserted axially into the faucet upper connection port of the stop cock and its tip is seated in a watertight manner on the valve seat of the stop cock, the circulation part and the partition part of the flow path forming member A communication space that communicates the outflow path and the outflow side connection port of the stop cock is formed between the boundary portion and the inner peripheral surface of the pipe portion that communicates with the outflow side connection port of the stop cock It was made to be.

  According to a fifth aspect of the present invention, in the pressure reducing valve according to the fourth aspect, the connection portion protrudes substantially orthogonally from the outer peripheral surface of the valve body, and the outer periphery of the base end portion of the partition portion of the flow path forming member Is formed in the valve body so as to form a substantially semi-cylindrical space on the string side of the substantially semi-cylindrical partition portion, and for the upper part of the faucet of the stop cock The connection port has an attachment portion that can be connected in a watertight manner.

  According to a sixth aspect of the present invention, in the configuration of any one of the first to fifth aspects, the pressure reducing valve according to the sixth aspect includes a substantially cylindrical water stop chamber that houses the water stop means and the water pressure control means. And a substantially cylindrical water pressure control chamber as the primary pressure chamber, and the water pressure control chamber and the water stop chamber are integrally formed so that their axial directions are substantially orthogonal to each other.

The pressure reducing valve according to a seventh aspect is the configuration according to the first or sixth aspect , wherein the valve main body arranges the water stop chamber on a flowing water path between an inflow path of the flow path forming member and the hydraulic pressure control chamber. did.

According to an eighth aspect of the present invention, there is provided the pressure reducing valve according to the first, sixth, or seventh aspect , wherein the valve body has a substantially cylindrical outer wall that surrounds the hydraulic pressure control chamber, and one axial end of the hydraulic pressure control chamber is provided. Opening to form a pressure regulating valve seat and extending the water pressure control chamber in the axial direction in the outer wall so as to communicate between the outer wall and the water pressure control chamber via the pressure regulating valve seat The secondary pressure chamber is formed, and the water pressure control means is fixed to the valve rod that is reciprocally movable in the axial direction inside the water pressure control chamber of the valve body, and is fixed to the tip of the valve rod. A pressure adjusting top that is slidably opposed to the pressure adjusting valve seat outside the water pressure control chamber and approaches or separates from the pressure adjusting valve seat as the valve rod moves, and is coaxial with the base end of the valve rod And a pressure adjusting piston disposed in the secondary pressure chamber, and the pressure adjusting piston The valve rod by moving the pressure regulating piston in the axial direction by the biasing force of the biasing member according to the water pressure in the secondary pressure chamber. The pressure adjusting top is moved closer to or away from the pressure adjusting valve seat.

According to a ninth aspect of the present invention, in the configuration of any one of the first, sixth to eighth aspects, the water stop chamber of the valve body forms a water stop valve seat by opening one end in the axial direction. A water means is disposed inside the water stop chamber and is capable of operating its proximal end from the outside of the valve body so as to move forward or backward in the axial direction in the water stop chamber, and the plug A water stop top fixed to the tip of the rod and facing the water stop valve seat in the water stop chamber so as to be freely seated and approaching or moving away from the water stop valve seat as the plug rod moves. And shuts off the flowing water between the water flow path and the outflow path of the flow path forming member by moving the stopper rod forward and seating the water stop top on the water stop valve seat. .

A pressure reducing valve according to a tenth aspect of the present invention is the pressure reducing valve according to the ninth aspect , wherein the water stop means further includes a storage portion extending in the axial direction from the tip of the plug rod to the inside, and the plug rod storage portion. And a biasing member disposed on the outer periphery of the top shaft in the stopper rod receiving portion, and the water stop top is fixed to the tip of the top shaft. By energizing the water stop top toward the water stop valve seat by the biasing member, the water stop top functions as a reverse stop top.

The pressure reducing valve according to an eleventh aspect of the invention is the structure of the ninth or tenth aspect , further comprising a strainer disposed downstream of the water stop top in the water stop chamber.

According to a twelfth aspect of the present invention, in the configuration of the eleventh aspect , the pressure reducing valve further includes a cap for fixing the base end portion of the plug rod to the valve body, and the cap is connected to the plug rod. Separated and removable, the stopper rod is moved forward and the water stop is seated on the water stop valve seat, and the cap is removed from the valve body to remove the cap from the inside of the water stop chamber. Was exposed.

A pressure reducing valve according to a thirteenth aspect includes an inflow side connection port connected to a primary side of a liquid piping path, and a connection port for an upper part of a liquid stopper arranged to face the axial direction of the inflow side connection port, An outflow side connection port that is disposed in a direction intersecting with a line connecting the inflow side connection port and the connection port for the upper part of the liquid stopper, connected to the secondary side of the piping path, the inflow side connection port, and the outflow A valve seat disposed in a path between the side connection port and a top attached to the connection port for the upper part of the liquid stopper, and a top accommodated in the connection port for the upper part of the liquid stopper; A pressure reducing valve that is used by being connected to the liquid stopper upper connection port of a liquid stopper having a surface seated on the valve seat and the valve seat being liquid-tightly closeable. A valve body having a primary pressure chamber and a secondary pressure chamber communicating with each other, and a primary pressure chamber of the valve body, A hydraulic pressure control means for controlling the hydraulic pressure of the secondary pressure chamber, a connection portion provided in the valve body and having a substantially annular shape that can be liquid-tightly connected to a liquid stopper upper connection port of the stop cock; Formed in a tubular shape communicating with the inside of the valve body on the proximal end side, and when the connection portion is liquid-tightly connected to the liquid stopper upper connection port of the liquid stopper, the connection for the liquid stopper upper portion of the liquid stopper It is inserted axially into the mouth and its tip is seated liquid tightly on the valve seat of the stopcock, and the primary pressure chamber is connected to the stopcock of the stopcock through the valve seat of the stopcock. While forming an inflow path communicating with the inflow side connection port, the secondary side pressure chamber is communicated with the outflow side connection port of the liquid stopper between the outer peripheral surface and the inner peripheral surface side of the connection portion. A flow path forming member that forms an outflow path, and an opening that is disposed between the inflow path and the outflow path of the flow path forming member and that opens between the inflow path and the outflow path And a movable stop solution means between a blocking position for blocking the liquid-tight and location, the flow path forming member, focused placing the inlet passage and said outlet channel at its base end side, said valve The main body further includes a substantially cylindrical liquid stop chamber that houses the liquid stop means, and a substantially cylindrical liquid pressure control chamber as the primary pressure chamber that houses the liquid pressure control means, The secondary pressure chamber is disposed adjacent to the downstream side of the hydraulic pressure control chamber, and is converged on the base end side of the flow path forming member by the liquid stop chamber, the hydraulic pressure control chamber, and the secondary pressure chamber. A flowing liquid path extending from the inflow path to the outflow path was formed between the arranged inflow path and the outflow path.

  The pressure reducing valve according to claim 1 can be reduced in size and size as a whole, and when attached to a stop cock such as an angle stop cock of a water supply pipe, a faucet upper part (handle) of the stop cock is attached. By simply removing and replacing the faucet upper part, it can be easily and quickly attached to the faucet, the piping work can be easily performed, and the water shutoff function can also be exhibited.

In addition to the above-described effect, the pressure reducing valve according to claim 1 has an inflow path and an outflow path convergingly arranged on the proximal end side of the flow path forming member, and a flowing water path extending from the inflow path to the outflow path is circular. Therefore, it is possible to configure a running water path that returns from approximately one point (the base end of the inflow path) to the same point (the base end of the outflow path) in the almost shortest path, making the overall configuration even more compact. be able to.

  In the pressure reducing valve according to claim 2, the outflow path is formed between the portion corresponding to the inner peripheral surface of the connection portion and the inner peripheral surface of the connection portion on the proximal end side from the reduced portion of the flow path forming member. Then, the inflow path and the outflow path in the flow path forming member are arranged adjacent to each other with only the wall thickness of the flow path forming member being separated. As a result, the inflow path and the outflow path can be arranged in a concentrated manner, and the configuration of the portion can be made compact.

  In addition to the effect of the second aspect, the pressure reducing valve according to the third aspect has a substantially tapered peripheral wall because the flow path forming member has a substantially tapered peripheral wall at a part of the tip side in the longitudinal direction. However, it is possible to increase the water flow resistance in the inflow path that becomes the primary flow path inside the flow path forming member, and to control the water supply pressure more effectively. In addition, since the partition part on the base end side from the part in the length direction of the flow path forming member forms a substantially semi-cylindrical peripheral wall, the inflow path and the outflow path are the wall thickness of the peripheral wall in the partition part. The flow path is divided into two symmetrically arranged adjacent to each other, so that the inflow resistance and the outflow resistance in the section can be made substantially equal, and the water flow can be smoothly formed.

  In addition to the effect of the third aspect, the pressure reducing valve according to the fourth aspect can smoothly guide the water flowing out from the outflow passage to the outflow side connection port of the stop cock by the peripheral portion on the front end side of the flow path forming member. it can.

  In addition to the effect of the fourth aspect, the pressure reducing valve according to the fifth aspect forms an outflow path with the partition portion of the flow path forming member without providing a special separate member by the attachment portion of the connection portion. Therefore, the overall configuration can be made more compact.

  In addition to the effect of any one of claims 1 to 5, the pressure reducing valve according to claim 6 is integrally formed by arranging the water pressure control chamber and the water stop chamber so that their axial directions are substantially orthogonal to each other. Can be made more compact, and space saving can be accommodated.

In addition to the effect of claim 1 or 6 , the pressure reducing valve according to claim 7 adjusts the water stop amount of the water stop means before reaching the water pressure control chamber because the water stop chamber is located upstream of the water pressure control chamber. By doing so, the flow rate can be adjusted in the water stop chamber portion, and the water pressure can be controlled more effectively.

In addition to the effect of any one of the first, sixth and seventh aspects, the pressure reducing valve according to the eighth aspect is configured such that the secondary side pressure chamber has a simple structure by providing an outer wall outside the water pressure control chamber of the valve body. In addition, the water pressure can be adjusted with a simple structure such as a pressure adjusting piston.

In addition to the effects of any one of claims 1 and 6 to 8 , the pressure reducing valve according to claim 9 has a simple structure such as a water stop valve seat provided at one end of the water stop chamber, a stopper rod, and a water stop top. A water stopping means that exhibits a water stopping function and a water amount adjusting function can be configured.

In addition to the effect of the ninth aspect , the pressure reducing valve according to the tenth aspect can also be used as a non-return top, and the reverse flow of the water flow from the secondary side can be performed without increasing the overall structure. It can be surely prevented.

In addition to the effect of the ninth or tenth aspect , the pressure reducing valve according to the eleventh aspect can reliably prevent the passage of dust in the water stop chamber portion by the strainer. It is possible to reliably prevent problems such as these.

In addition to the effect of the eleventh aspect , the pressure reducing valve according to the twelfth aspect of the present invention is configured such that the cap is separated from the stopper rod and removed to approach the water stop chamber in a state where water is stopped by the water stop means. The strainer can be easily replaced and cleaned.

The pressure reducing valve according to the thirteenth aspect can be reduced in size and size as a whole, and when attached to a stop plug such as an angle stop plug of the liquid supply pipe, the top of the stop plug (handle) By simply removing and replacing the top of the liquid stopper, it can be easily and quickly attached to the stop cock, piping work can be easily performed, and the liquid stop function can also be exhibited.

In addition to the above effect, the pressure reducing valve according to the thirteenth aspect has an inflow path and an outflow path convergingly arranged on the base end side of the flow path forming member, and circulates in the liquid flow path extending from the inflow path to the outflow path. Because it is formed into a shape, it is possible to configure a liquid flow path that exits from approximately one point (base end of the inflow path) and returns to the same point (base end of the outflow path) in the almost shortest path, making the overall configuration even more compact Can be.

  Hereinafter, the best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described.

  FIG. 1 is a cross-sectional view showing the internal structure of a pressure reducing valve according to an embodiment of the present invention cut along the axial center of a water stop chamber of a valve body. FIG. 2 is a cross-sectional view showing the internal structure of a pressure reducing valve according to an embodiment of the present invention cut along the outer wall of the valve body or the axial center of the water pressure control chamber. FIG. 3 is a side view showing a pressure reducing valve according to an embodiment of the present invention. FIG. 4 is a front view showing a pressure reducing valve according to an embodiment of the present invention. FIG. 5 is a perspective view showing a state in which the cap of the pressure reducing valve according to the embodiment of the present invention is attached to the valve body. FIG. 6 is a perspective view showing a state where the cap of the pressure reducing valve according to the embodiment of the present invention is removed from the valve body and the strainer is taken out from the water stop chamber of the valve body. FIG. 7 is a cross-sectional view showing the flowing water path in the state where the pressure reducing valve according to the embodiment of the present invention is attached to the water stop cock in the cross-sectional structure of FIG. FIG. 8 is a cross-sectional view showing the water flow path in the state where the pressure reducing valve according to the embodiment of the present invention is attached to the water stop cock in the cross-sectional structure of FIG.

  As shown in FIGS. 1 to 8, the pressure reducing valve 100 according to the present embodiment is used by being connected to a faucet upper connection port 12 of a so-called angle stop cock 10 (see FIG. 7). As shown in FIG. 7, the angle stop cock 10 generally includes an inflow side (inlet side) connection port 11, a faucet upper connection port 12, an outflow side (outlet side) connection port 13, and a faucet. And an upper portion (not shown in FIG. 7). The inflow side connection port 11 is connected to a pipe 21 on the primary side (distribution pipe side) of a piping path such as a water pipe or a water purifier pipe. Further, the faucet upper connection port 12 is arranged coaxially with the inflow side connection port 11 and facing the axial direction. The outflow side connection port 13 is arranged in a direction substantially orthogonal to the line connecting the inflow side connection port 11 and the faucet upper connection port 12, and is on the secondary side of the piping path (water supply equipment such as a water faucet). Connected to the water supply pipe 22. Further, a valve seat 14 having a valve hole in the center is integrally formed in the flowing water path between the inflow side connection port 11 and the outflow side connection port 13. The faucet upper part is attached to the faucet upper connection port 12 and has a top accommodated therein from the faucet upper connection port 12, and the top surface of the top is seated on the valve seat 14. The valve hole of the valve seat 14 is closed in a watertight manner, and the water flow from the primary side pipe 21 to the secondary side water supply pipe 22 can be stopped (stopped) with the stop cock 10. . Further, the upper part of the faucet can adjust the amount of water flowing through the faucet 10 by adjusting the distance that the top is separated from the valve seat 14 of the faucet 10.

  On the other hand, the pressure reducing valve 100 includes a valve main body 110, a flow path forming member 120, a water pressure control chamber 130, water pressure control means 140, 150, 160, a connection part 170, and water stop means 181 to 185. The valve body 110 includes a primary pressure chamber P1 and a secondary pressure chamber P2 that communicate with each other. The water pressure control means 140, 150, 160 are provided in the primary pressure chamber P1 of the valve body 110, and the water pressure in the secondary pressure chamber P2 is controlled within a certain range by adjusting the amount of water flowing out from the primary pressure chamber P1. Alternatively, it is controlled and held at a constant value. The connecting portion 170 is provided in the valve body 110 and has a substantially annular shape that can be connected or connected to the faucet upper connection port 12 of the stop cock 10 in a watertight manner. The flow path forming member 120 has a tubular shape communicating with the inside of the valve body 110 on the proximal end side. Further, the flow path forming member 120 is pivoted into the faucet upper connection port 12 of the stop cock 10 when the connection portion 170 is watertightly connected to the faucet upper connection port 12 of the stop cock 10. It is inserted in the direction, and its tip is brought into contact with and seated on the valve seat 14 of the stop cock 10 in a watertight manner, and the inflow side connection port 11 of the stop cock 10 through the valve hole of the valve seat 14 of the stop cock 10. An inflow path R1 communicating with the primary pressure chamber P1 through a flowing water path in the valve body 110, which will be described later, is formed. On the other hand, the flow path forming member 120 has an outflow path R2 that communicates the secondary side pressure chamber P2 with the outflow side connection port 13 of the stop cock 10 between the outer peripheral surface and the inner peripheral surface side of the connection portion 170. Form. The water stop means is disposed between the inflow path R1 and the outflow path R2 of the flow path forming member 120, and is between an open position that opens between the inflow path R1 and the outflow path R2 and a blocking position that blocks watertightly. It can be moved freely.

  Specifically, the valve main body 110 includes a substantially cylindrical water stop chamber 111 that houses the water stop means, and the water pressure control chamber 130 that contains the water pressure control means. The water pressure control chamber 130 has a substantially cylindrical partition shape and constitutes a primary pressure chamber P1. In addition, the valve body 110 is integrally formed by arranging the water pressure control chamber 130 and the water stop chamber 111 so that the axial directions thereof are substantially orthogonal to each other. Further, in the valve body 110, the secondary pressure chamber P2 is disposed adjacent to the downstream side of the water pressure control chamber 130. Furthermore, in the state where the pressure reducing valve according to the present embodiment is attached to the stop cock 10, the valve main body 110 includes a stop water chamber 111 and a water pressure control chamber 130 which are arranged orthogonally to each other. It extends in a direction orthogonal to the side pipe 22, and the space is reduced by making the whole compact design. More specifically, the valve main body 110 communicates the water stop chamber 111 with the inflow path R1 of the flow path forming member 120 through the flow path W1. The flow path W1 of the valve main body 110 extends orthogonally from the front end of the inflow path R1 of the flow path forming member 120, and the water stop chamber 111 has a substantially cylindrical shape extending orthogonally from the front end of the flow path W1. The water stop chamber 111 is formed with a water stop valve seat 112 having one end in the axial direction opened and the opening as a valve hole. Further, a female screw portion 113 having a short cylindrical shape smaller in diameter than the water stop chamber 111 is integrally formed in the inner space of the water stop chamber 111 in a coaxial manner. The female screw portion 113 forms a female screw 113a on the inner peripheral surface thereof. Furthermore, the water stop chamber 111 has a bulge portion 114 that bulges outward, and the water that has flowed into the interior through the water stop valve seat 112 of the water stop chamber 111 from the flow path W1 is expanded. It flows smoothly along the inner peripheral surface of 114, and reverses toward the outlet 115 on the proximal end side of the water stop chamber 111 so as to effectively flow.

  On the other hand, the water stop means includes a stopper rod 181 and a water stop top 182. The stopper rod 181 has a stepped cylindrical shape or a columnar shape arranged inside the water stop chamber 111, and moves forward or backward in the axial direction in the water stop chamber 111. Specifically, the plug bar 181 includes a cylindrical male screw portion 181a that is screwed into the female screw 113a of the female screw portion 113, an intermediate portion 181b having a smaller diameter than the male screw portion 181a, and an intermediate portion. The operation portion 181c having a columnar shape smaller in diameter than 181b is integrally formed coaxially. Further, the water stop top 182 is fixed to the tip of the stopper rod 181 and faces the water stop valve seat 112 in the water stop chamber 111 so as to be freely seated, and the stopper rod 181 moves in the axial direction (forward movement). (Or double action), it approaches or separates from the water stop valve seat 112. Specifically, the plug bar 181 forms an accommodating portion 181d consisting of a stepped cylindrical recess extending in the axial direction from the center of the tip to the inside in the axial direction. In addition, a cylindrical shaft 183 having a cylindrical shape with the same diameter is inserted into the small diameter portion of the accommodating portion 181d of the plug bar 181 so as to be slidable in a reciprocating manner. The water stop top 182 is fixed to the tip of the top shaft 183 with a nut N. Further, a check spring 184 made up of a pressing coil spring as a biasing member is accommodated and disposed on the outer periphery of the top shaft 183 in the large-diameter portion on the distal end side of the accommodating portion 181d of the plug bar 181. The water stop top 182 fixed to the top end of the top shaft 183 is pressed against the water stop valve seat 112 by the check spring 184, thereby separating the water stop top 182 from the water stop valve seat 112. Thus, the water stop top 182 functions as a check top when it is opened. Furthermore, a substantially ring-shaped base end portion 185a of the guide piece 185 is interposed and fixed between the water stop top 182 and the nut N, and a protruding portion 185b protruding from the base end portion 185a of the guide piece 185. Is inserted into the valve hole of the water stop valve seat 112. The protrusion 185b of the guide piece 185 is held in the valve hole of the water stop valve seat 112 and abuts and locks the inner peripheral surface thereof even when the water stop top 182 is farthest from the water stop valve seat 112. Has a protruding length. As the water stop top 182 moves forward or backward, the protrusion 185b of the guide piece 185 slides in the valve hole of the water stop valve seat 112 in the axial direction, so that the water stop top 182 moves smoothly. To guide you.

  An opening 116 having a circular inner peripheral surface is formed coaxially at the proximal end of the water stop chamber 111 (on the side opposite to the water stop valve seat 112). A female screw 116 a is formed on the inner peripheral surface of the opening 116. Is formed. A cap 186 having a short ring shape with the same diameter as the opening 116 is fixed in the opening 116 by screwing a male screw 186a on the outer peripheral surface thereof into the female screw 116a of the opening 116, and an O-ring. The water tightness between the openings 116 is maintained by RG. On the other hand, the cap 186 is formed with a circular holding hole 186b having the same diameter as the operation portion 181c of the plug bar 181 at the center thereof. The operation portion 181c of the plug bar 181 is inserted and held in a watertight manner through the O-ring RG in the holding hole 186b of the cap 186. A locking groove 181e extending in the diameter direction is formed on the base end surface of the operation portion 181c, and a tool such as a flat-blade screwdriver is inserted into the locking groove 181e so that the operation portion 181c of the plug bar 181 is rotated clockwise or counterclockwise. , The male screw part 181a of the plug bar 181 is screwed in or screwed out of the female screw part 113 of the water stop chamber 111, and the operation part 181c of the plug bar 181 passes through the holding hole 186b of the cap 186. It slides in the axial direction to move forward or double. For example, at the water stop position of the water stop means shown above the alternate long and short dash line in FIG. 1, the stopper bar 181 moves forward by rotating the operation portion 181c of the plug bar 181 clockwise from the outside. The top 182 sits on the water stop valve seat 112 to close the valve hole, and shuts off the flowing water from the inflow path R1 of the flow path forming member 120 on the primary side. In the state where the flowing water pressure from the inflow path R1 of the flow path forming member 120 is not applied to the water stop top 182, the water stop top 182 protrudes corresponding to the length of the check spring 184 in the extended state (extension length). It is in a state of protruding from the tip of the plug rod 181 by the length. Therefore, when the water stop top 182 is seated, with the forward movement of the stopper rod 181, first, after the water stop top 182 in the protruding state contacts the water stop valve seat 112, the stopper rod 181 further moves forward. The water stop top 182 elastically approaches and abuts against the distal end surface of the stopper rod 181 against the urging force of the water stop spring 184, and the water stop top 182 is completely seated against the water stop valve seat 112. Thus, the water stop position is obtained.

  On the other hand, as shown below the alternate long and short dash line in FIG. 1, the water stop means 180 rotates the operation portion 181c of the plug bar 181 from the outside in the counterclockwise direction from the water stop position. Is moved back, the water stop top 182 is separated from the water stop valve seat 112 to open its valve hole, and an open position allowing the passage of flowing water from the inflow passage R1 of the flow path forming member 120 on the primary side, Become. As described above, in the present embodiment, the operation portion 181c on the base end side can be freely rotated from the outside of the valve body 110 via the locking groove 181e of the plug rod 181 so that the plug rod 181 is reciprocated. The water stop top 182 is seated on or separated from the water stop valve seat 112 to block or open the water flow between the water flow path R1 and the outflow path R2 of the flow path forming member 120. . Note that, as described above, in the state where the flowing water pressure from the inflow path R1 of the flow path forming member 120 is not applied to the water stop piece 182, the water stop piece 182 has a protrusion length corresponding to the extension length of the check spring 184. Although it is in a state of protruding from the tip of the stopper rod 181, when the flowing water pressure from the inflow path R 1 of the flow path forming member 120 is applied to the water stop top 182, the water stop top 182 biases the check spring 184. Against this, it abuts against the distal end surface of the plug bar 181 and maintains that state until the flowing water pressure disappears. Therefore, when the water stop top 182 is opened, the stopper rod 181 is moved backward until the tip end surface of the water stop top 182 protruding by the protrusion length corresponding to the extension length of the water stop spring 183 is separated from the water stop valve seat 112. Instead, the stopper rod 181 is moved backward within a range in which the tip end surface of the protruding water stop top 182 maintains contact with the water stop valve seat 112 within the extension length of the check spring 183. To do. In this way, when water flows backward from the secondary side (outflow passage R2 side), the inside of the water stop chamber 111 becomes positive pressure, and the inflow passage R1 side (flow passage W1 side) of the flow path forming member 120 is negative pressure. Thus, the water stop top 182 is separated from the distal end surface of the stopper rod 181 by the urging force of the water stop spring 184 and is seated on the water stop valve seat 112 to function as a check top (check valve).

  As shown in FIGS. 4 to 6, a locking groove 186 c extending in the diameter direction is formed on the outer end surface of the cap 186, and a tool such as a flat-blade screwdriver is inserted into the locking groove 186 c so that the cap 186 is rotated counterclockwise. , The cap 186 can be screwed out and removed from the opening 116 of the valve body 110. At this time, the stopper bar 181 slides relatively in the axial direction in the holding hole 186b of the cap 186 and maintains its axial position, so that the stopper bar 181 moves in the axial direction and the water stop top 182 It does not move from its axial position (sitting position or open position). Here, a strainer 191 made of a cylindrical net body is disposed in the water stop chamber 111 on the downstream side of the moving range of the water stop top 182. Specifically, the strainer 191 has a cylindrical shape slightly smaller in diameter than the axial base end corresponding to the outflow port 115 of the water stop chamber 111, and the axial base end side corresponding to the outflow port 115 in the water stop chamber 111. In the position, it is arranged coaxially so as to surround the stopper rod 181. In addition, the strainer 191 is partially accommodated in the outlet 115 of the water stop chamber 111 and covers the entire outlet 115. As a result, water flowing from the water stop chamber 111 to the water flow path after the adjacent water pressure control chamber 130 through the outlet 115 flows out in a state where foreign matters such as dust are completely filtered by the strainer 191. ing. Further, as described above, the water stop means has the cap 186 that fixes the base end portion of the plug rod 181 to the valve body 110, while the cap 186 is separated from the plug rod 181 and can be removed. Therefore, by removing the cap 186 from the valve body 110 in a state where the stopper rod 181 is moved forward and the water stop top 182 is seated on the water stop valve seat 112, the inside of the water stop chamber 111 is exposed and the strainer is exposed. 191 can be easily replaced and cleaned.

  The flow path forming member 120 is integrally formed so as to protrude substantially orthogonally to a side portion of the valve body 110 facing the water pressure control chamber 130. Further, the tubular flow path forming member 120 has a shape and a dimension in which the distal end surface substantially coincides (matches) with the seating surface of the valve seat 14 of the water stop cock 10, and from the distal end side to the proximal end side. It has at least part of a reduced portion that shrinks toward it. Further, the flow path forming member 120 forms the outflow path R <b> 2 between a portion corresponding to the inner peripheral surface of the connecting portion 170 on the proximal side from the reduced portion and the inner peripheral surface of the connecting portion 170. Specifically, the flow path forming member 120 has a substantially tapered peripheral wall in which the opening on the distal end surface has a substantially circular shape, and one radial portion of the distal end in the longitudinal direction is inclined toward the center. And the portion on the other side in the radial direction forms a substantially semi-cylindrical peripheral wall, while the portion on the base end side from the part in the length direction on the tip side is substantially semi-cylindrical in the other side in the radial direction. A substantially semi-cylindrical peripheral wall having substantially the same cross section that is continuous with the peripheral wall is formed, and the opening on the base end side is substantially semicircular. More specifically, the flow path forming member 120 has an annular shape with a front end surface (left end surface in FIG. 1) that substantially matches the annular seating surface of the valve seat 14 of the water stop cock 10. It has a tubular shape having a portion that reduces the diameter or size toward the end side. In addition, the flow path forming member 120 has the base end opening facing the flow path W1 constituting a part of the flowing water path reaching the primary pressure chamber P1 of the valve body 110, so that the valve seat 14 of the water stop cock 10 is provided. The size is smaller than the opening of the tip surface facing the surface.

  That is, the flow path forming member 120 has a substantially circular opening at the tip end surface, and a radial one side portion of the tip end portion in the longitudinal direction is inclined (reduced diameter) toward the center. The other side portion in the radial direction forms a substantially semi-cylindrical peripheral wall, while the other side portion in the length direction on the tip side is the other side portion in the radial direction. A substantially semicircular peripheral wall having substantially the same cross section is formed continuously with the substantially semicircular peripheral wall, and the opening on the base end side is substantially semicircular. Specifically, the distal end portion of the flow path forming member 120 (the portion corresponding to the outflow side connection port 13 of the water stop cock 10 in the distal end side) is a substantially cylindrical circumferential portion 121. Further, a part in the length direction on the proximal end side from the rotating portion 121 of the flow path forming member 120 is a tapered portion 123. Further, a portion on the proximal end side from the tapered portion 123 of the flow path forming member 120 is a substantially semi-cylindrical partition portion 122. When the flow path forming member 120 is inserted axially into the faucet upper connection port 12 of the stop cock 10 and its tip is seated watertight on the valve seat 14 of the stop cock 10. , A boundary portion between the circulation portion 121 and the partition portion 122 of the flow path forming member 120 and a pipe portion communicating with the outflow side connection port 13 of the water stop cock 10 (from the faucet upper connection port 12 to the outflow side connection port 13 A communication space that communicates the outflow path R2 and the outflow side connection port 13 of the stop cock 10 is formed between the inner peripheral surface of the angled portion). The partition part 122 has a flat surface (that is, a semicircular shape) whose outer surface is a semicircular outer peripheral surface 122a having a semicircular cross section and whose upper surface side matches the diameter of the outer peripheral surface 122a. The outer surface 122b is a flat surface corresponding to the strings of In addition, the taper portion 123 has a diameter of the upper portion of the boundary portion between the circulation portion 121 and the partition portion 122 of the flow path forming member 120 reduced from the upper outer peripheral surface of the circulation portion 121 toward the outer surface 122b of the partition portion 122. Alternatively, it has an inclined taper shape.

  A circular concave accommodating portion 121a for accommodating the top packing 125 is formed on the inner periphery of the distal end side (the left end side in FIG. 1) of the circumferential portion 121 of the flow path forming member 120, and the top packing is provided in the accommodating portion 121a. 125 is elastically inserted. A circular hole 121b is formed in the bottom wall of the accommodating portion 121a of the rotating portion 121. Accordingly, the flow path forming member 120 has a circular opening corresponding to the valve seat 14 of the water stop cock 10 at the front end surface, and at a part in the length direction on the front end side (left end portion in FIG. 1). The one side portion in the radial direction (the upper side portion in FIG. 1) is reduced or inclined toward the center to form a tapered portion 123 as a substantially tapered peripheral wall, and the other side portion in the radial direction is substantially half. A cylindrical peripheral wall is formed. Accordingly, the inner peripheral surface of the flow path forming member 120 in the longitudinal direction is a tapered inner peripheral surface of the tapered portion 123 and a short semi-cylindrical inner peripheral surface of the substantially semi-cylindrical peripheral wall. It becomes the shape which joined. On the other hand, the flow path forming member 120 has a section 122 as a peripheral wall in which a portion other than a part in the length direction on the distal end side forms a substantially semi-cylindrical shape substantially the same as a substantially semi-circular peripheral wall on the other side in the radial direction. Is forming. Therefore, the opening on the base end side of the flow path forming member 120, that is, the base end opening of the partition part 122 is substantially semicircular.

  On the other hand, the valve body 110 has a substantially cylindrical outer wall 117 that surrounds the hydraulic control chamber 130 (having a larger diameter than the hydraulic control chamber 130). As shown in FIG. 2, the outer wall 117 of the valve body 110 is formed by forming circular openings at both axial ends (left and right ends in FIG. 2), and inserting internal structural components into the inside from both openings. It has become. A spring cover 118 is detachably attached to the opening at the right end of the outer wall 117 so as to be coaxial with the outer wall 117. The spring cover 118 closes one end in the axial direction (the right end in FIG. 1) and has a substantially short cylindrical shape in which a male screw is threaded on the outer peripheral surface of the other end in the axial direction, and the male screw is connected to the right end of the outer wall 117. By screwing into a female screw formed on the inner peripheral surface of the opening, the outer wall 117 is detachably attached. Between the spring cover 118 and the inner peripheral surface of the right end opening portion of the outer wall 117, a sealing member made of an O-ring RG or the like is attached over the entire periphery, and between the spring cover 118 and the right end opening of the outer wall 117. It is designed to maintain watertightness. Further, at the center of the back surface of the spring cover 118 (left surface in FIG. 2), an engagement projection 118a having a block shape such as a short columnar shape is directed toward the inside of the outer wall 117 (left side in FIG. 1). It is integrally formed to extend in the axial direction. On the other hand, a sealing plate 119 made of a tightening nut or the like is detachably attached to the opening at the left end of the outer wall 117 so as to be coaxial with the outer wall 117. The sealing plate 119 is formed in a disk shape having an outer shape matching one end in the axial direction (left end in FIG. 2) with the left end surface of the outer wall 117, and the other end in the axial direction is substantially aligned with the inner peripheral surface of the left end of the outer wall 117. A short cylindrical shape with a diameter to be formed, and a male screw is screwed on the outer peripheral surface of the short cylindrical portion. The sealing plate 119 is detachably attached to the outer wall 117 by screwing the male screw into a female screw formed on the inner peripheral surface of the left end opening of the outer wall 117. Between the sealing plate 119 and the inner peripheral surface of the left end opening portion of the outer wall 117, a sealing member made of an O-ring RG or the like is mounted over the entire periphery, and the sealing plate 119 and the left end opening of the outer wall 117 are connected. The water tightness between them is maintained. Moreover, the center part of the back surface (right surface in FIG. 2) of the sealing plate 119 is a curved surface that curves in a concave shape.

  Inside the outer wall 117, the water pressure control chamber 130 has a substantially cylindrical shape having a smaller diameter than the outer wall 117, and the outer wall 117 is spaced a predetermined distance from the outer peripheral surface thereof and the inner peripheral surface of the outer wall 117. It arrange | positions so that a part of axial direction length may be extended. Specifically, the hydraulic pressure control chamber 130 has a substantially cylindrical insertion portion 131 on one end side in the axial direction (right end side in FIG. 2) and a bulging portion 132 on the other end side in the axial direction. The bulging portion 132 has a drum shape or a barrel shape that bulges outward in such a manner that the central portion in the axial direction has a larger diameter than the insertion portion 131. That is, the water pressure control chamber 130 extends substantially coaxially with the outer wall 117, and the right half is the cylindrical insertion portion 131, and the left half is expanded outward. The protruding portion 132 is formed integrally with the inside of the outer wall 117. Further, the hydraulic pressure control chamber 130 has one end in the axial direction closed watertightly with another member, and the other end in the axial direction is opened in a substantially circular shape. Accordingly, the primary pressure chamber P <b> 1 is formed on the inner peripheral surface side of the water pressure control chamber 130 so as to be a substantially cylindrical space by the inner peripheral surface of the water pressure control chamber 130. On the other hand, between the outer peripheral surface of the water pressure control chamber 130 and the inner peripheral surface of the outer wall 117, the secondary pressure chamber P2 has a shape between the outer peripheral surface of the water pressure control chamber 130 and the inner peripheral surface of the outer wall 117. A corresponding substantially cylindrical space is formed. Furthermore, the water pressure control chamber 130 forms a pressure regulating valve seat 133 at the opening at the other end in the axial direction, and communicates the primary pressure chamber P1 and the secondary pressure chamber P2 via the pressure regulating valve seat 133. is doing. As described above, the valve main body 110 has the substantially cylindrical outer wall 117 surrounding the water pressure control chamber 130 (having a larger diameter than the water pressure control chamber 130), while opening one end in the axial direction of the water pressure control chamber 130. The pressure regulating valve seat 133 is formed, and the water pressure control chamber 130 is extended in the axial direction in the outer wall 117 so as to communicate with the outer wall 117 and the water pressure control chamber 130 via the pressure regulating valve seat 133. A secondary pressure chamber P2 is formed.

  The water pressure control means includes a valve rod 140 and a pressure adjusting top 146. The valve rod 140 is coaxially arranged inside the water pressure control chamber 130 and can reciprocate in the axial direction. The valve stem 140 includes a guide portion 141 and a rod portion 144. The guide portion 141 has a substantially short cylindrical shape, and is fitted into the insertion portion 131 of the hydraulic pressure control chamber 130 in a watertight manner so as to be slidable in the axial direction. Moreover, the guide part 141 forms the circular accommodation groove 142 in the axial direction center. The accommodation groove 142 of the guide portion 141 extends the entire outer circumferential surface of the guide portion 141 in the circumferential direction. A sealing member such as an O-ring RG is elastically attached to the accommodation groove 142 of the guide portion 141, and is between the outer peripheral surface of the guide portion 141 and the inner peripheral surface of the insertion portion 131 of the water pressure control chamber 130. Maintains watertightness. The rod portion 144 has a substantially columnar shape or a substantially cylindrical shape, is integrally formed coaxially with the guide portion 141, extends to the left (in FIG. 1) in the axial direction of the hydraulic pressure control chamber 130, and is used for the pressure adjustment. It protrudes outward beyond the valve seat 133. That is, the distal end portion of the rod portion 144 protrudes into a space between the other axial end of the hydraulic pressure control chamber 130 and the other axial end of the valve body 110. A flange-like locking portion 145 is integrally provided on the distal end side of the rod portion 144 at a position outward from the pressure regulating valve seat 133 of the water pressure control chamber 130. A male screw (not shown) is threaded on the outer peripheral surface of the rod portion 144 on the distal end side from the locking portion 145.

  On the other hand, the pressure adjusting top 146 is fixed to the tip of the valve rod 140 and faces the pressure adjusting valve seat 133 so as to be seated outside the water pressure control chamber 130, that is, in the secondary pressure chamber P2. Further, the pressure adjusting top 146 approaches or separates from the pressure adjusting valve seat 133 as the valve rod 140 moves. Specifically, the pressure adjusting top 146 is disposed between the other axial end of the outer wall 117 and the pressure adjusting valve seat 133 at the other axial end of the water pressure control chamber 130. The pressure adjusting top 146 has a disk shape in which the top packing 146b is accommodated inside the top washer 146a, and is fixed to the tip (the left end in FIG. 1) of the rod portion 144 of the valve stem 140 by the washer WS and the nut N. ing. The pressure adjustment top 146 is seated on the pressure adjustment valve seat 133 of the water pressure control chamber 130 to form a disk shape that can seal the pressure adjustment valve seat 133 in a liquid-tight manner. Opposed. Then, the pressure adjustment top 146 is moved toward and away from the pressure adjustment valve seat 133 of the water pressure control chamber 130 to adjust the gap between them, or the pressure adjustment top 146 is seated on the pressure adjustment valve seat 133. By closing the primary pressure chamber P1 in the water pressure control chamber 130, the water pressure in the secondary pressure chamber P2 is controlled.

  In addition, the valve stem 140 is coaxially fixed to the proximal end and disposed in the secondary pressure chamber P2, and the pressure regulating piston 150 is urged in the axial direction (from the pressing coil spring). The pressure adjusting piston 150 is moved in the axial direction by the urging force of the urging member 160 according to the water pressure of the secondary side pressure chamber P2, and is adjusted via the valve rod 140. The water pressure in the secondary pressure chamber P2 is controlled by moving the pressure top 146 toward or away from the pressure regulating valve seat 133. Specifically, the water pressure control means further includes a pressure adjusting piston 150 and a pressure adjusting spring 160 as an urging member. The pressure regulating piston 150 is fitted into the inner peripheral surface of the outer wall 117 in a watertight manner so as to be slidable in the axial direction, and has a substantially disk shape facing the secondary pressure chamber P2 on the outer peripheral surface side of the hydraulic pressure control chamber 130. Eggplant. Specifically, the pressure adjusting piston 150 has a cylindrical portion 151 having an outer diameter substantially the same as the inner diameter of the valve body 110 and extending coaxially with the valve body 110, and one axial end of the cylindrical portion 151 (the right end in FIG. 2). ). A pair of circular accommodation grooves 151 a are formed on the outer peripheral surface of the cylindrical portion 151 of the pressure regulating piston 150 at intervals in the axial direction. The accommodation groove 151a of the cylindrical portion 151 extends the entire outer circumferential surface of the cylindrical portion 151a in the circumferential direction. A sealing member such as an O-ring RG is elastically attached to each of the pair of receiving grooves 151a of the cylindrical portion 151, so that water tightness between the outer peripheral surface of the cylindrical portion 151 and the inner peripheral surface of the outer wall 117 is reduced. It is maintained in a stage configuration. Further, a circular hole 152 a is formed through the central portion of the disk portion 152 of the pressure regulating piston 150.

  On the other hand, a stepped columnar engaging portion 149 is integrally provided at the right end of the guide portion 141 of the valve stem 140. A male screw (not shown) is threaded on the outer peripheral surface of the right end portion of the engaging portion 149. Then, the engaging portion 149 is inserted into the circular hole 152a of the disk portion 152 of the pressure adjusting piston 150, and the nut N is screwed into the male screw of the engaging portion 140 via the washer WS, thereby adjusting the pressure adjusting piston 150. Is fixed to the upper end side of the guide portion 141 of the valve rod 140 so as to be substantially coaxial. Thus, the cylindrical portion 151 of the pressure regulating piston 150 is accommodated and disposed in a substantially annular secondary pressure chamber P2 formed on the outer peripheral surface side of the hydraulic pressure control chamber 130. At this time, a predetermined gap is formed between the inner peripheral surface of the cylindrical portion 151 of the pressure regulating piston 150 and the outer peripheral surface of the insertion portion 131 of the water pressure control chamber 130. In other words, the inner diameter of the cylindrical portion 151 is slightly larger than the outer diameter of the insertion portion 131. Thus, the water in the secondary pressure chamber P2 comes into contact with the left end surface of the cylindrical portion 151 and the left surface of the disc portion 152 of the pressure regulating piston 150, and the left end surface of the cylindrical portion 151 and the left surface of the disc portion 152 are in contact with each other. The water pressure in the secondary side pressure chamber P2 is received.

  The pressure regulating spring 160 as the urging member is composed of a pressing coil spring or the like, and is interposed between one axial side surface of the pressure regulating piston 150 and one axial end of the outer wall 117. The pressure adjusting spring 160 has one end in the axial direction (the right end in FIG. 2) engaged with the engaging protrusion 118a of the spring cover 118 and the other end in the axial direction engaged with the nut N on the right surface side of the pressure adjusting piston 150. By combining, the spring cover 118 and the pressure regulating piston 150 are stably held. In addition, the pressure adjusting spring 160 always presses the pressure adjusting piston 150 in the axial direction, thereby pressing the valve rod 140 integrated with the pressure adjusting piston 150 leftward in the axial direction. In the non-pressurized state in which no water pressure is generated in the pressure reducing valve 100, in particular, in the primary pressure chamber P1 and the secondary pressure chamber P2, the pressure regulating piston 150, the valve rod is caused by the spring force of the pressure regulating spring 160. 140 and the pressure adjusting top 146 are the leftmost positions, and the gap between the pressure packing top 146 b of the pressure adjusting top 146 and the pressure adjusting valve seat 133 of the water pressure control chamber 130 is maximized.

  On the other hand, in a specific pressurizing state in which a water pressure of a predetermined value or more is generated in the pressure reducing valve 100, particularly in the secondary pressure chamber P2, the water pressure acts on the pressure regulating piston 150 in the secondary pressure chamber P2. Depending on the applied pressure (water pressure), a pressure is generated that pushes the pressure regulating piston 150 in the secondary pressure chamber P2 to the right. The pressure to the right moves the pressure adjusting piston 150, the valve rod 140 and the pressure adjusting top 146 to the right against the spring force of the pressure adjusting spring 160, and the top packing 146 b of the pressure adjusting top 146. And the pressure regulating valve seat 133 of the water pressure control chamber 130 are reduced. Accordingly, the gap between the top packing 146b of the pressure adjusting top 146 and the pressure adjusting valve seat 133 of the water pressure control chamber 130 is adjusted in accordance with the water pressure fluctuation acting on the pressure adjusting piston 150 in the secondary pressure chamber P2. . At this time, the water flow from the primary pressure chamber P1 to the secondary pressure chamber P2 is adjusted, so that the water pressure in the secondary pressure chamber P2 is finally maintained constant. In this embodiment, an opening with a female screw is formed in the disk-shaped portion of the spring cover 118, and a disk-shaped adjusting plate is screwed into the opening to adjust the screwing amount. The biasing force of the pressure spring 160 may be adjusted.

  The connection portion 170 protrudes from the outer peripheral surface of the side portion where the flow path forming member 120 is formed in the valve main body 110 so as to surround the base end portion of the flow path forming member 120. That is, the connection part 170 surrounds the outer periphery of the base end part of the partition part 122 of the flow path forming member 120 to form a substantially semi-cylindrical space on the string side of the substantially semi-cylindrical partition part 122. As described above, the valve body 110 has a mounting portion 171 formed integrally with the valve body 110 and having a substantially short semicylindrical shape. The attachment portion 171 is freely watertightly connectable to the faucet upper connection port 12 of the stop cock 10. Specifically, the attachment portion 171 has a substantially semi-cylindrical shape that is substantially symmetrical to the substantially semi-cylindrical shape of the proximal end portion of the partition portion 122 of the flow path forming member 120, and is approximately half as long as the partition portion 122. Have Also, a predetermined length having a substantially semicircular cross section is formed between the tip of the mounting portion 171 (left end in FIG. 2) and the other axial end of the circumferential portion 121 of the flow path forming member 120 (left end in FIG. 1). A gap is formed. Furthermore, the connection part 170 has sealing members, such as the cap nut 172, the ring 173, and O-ring RG. The cap nut 172 is attached across the outer peripheral surface of the base end side of the partition portion 122 of the flow path forming member 120 and the outer peripheral surface of the mounting portion 171. The ring 173 is fitted in a housing groove 171 a formed on the outer peripheral surface of the base end side of the partition portion 122 of the flow path forming member 120 and the outer peripheral surface of the mounting portion 171. Further, the seal member made of an O-ring RG or the like is provided between the inner peripheral surface of the substantially central portion of the cap nut 172 in the axial direction and the outer peripheral surface of the partition portion 122 and the outer peripheral surface of the mounting portion 171 of the flow path forming member 120. It is installed and maintains watertightness between them. The cap nut 172 can be moved a little in the axial direction via the ring 173.

  Then, the attachment portion 171 is opposed to the faucet upper connection port 12 of the stop cock 10, and the cap nut 172 is externally fitted to the faucet upper connection port 12 of the stop cock 10 and screwed together. The portion 170 is fixed to the faucet upper connection port 12 of the stop cock 10, whereby the pressure reducing valve 100 is fixed to the faucet upper connection port 12 of the stop cock 10. At this time, the flow path forming member 120 is inserted into the faucet upper connection port 12 of the water stop cock 10, and the top packing 125 is seated on the valve seat 14 of the water stop cock 10. The inflow passage R1 inside the forming member 120 and the valve hole of the valve seat 14 are communicated in a watertight manner. In addition, as described above, the inflow channel R1 includes a tapered space in the tapered portion 123 portion formed inside the flow path forming member 120 and a semi-cylindrical space in the partition portion 122 portion. On the other hand, when the pressure reducing valve 100 is attached to the stop cock 10, the outflow path R <b> 2 is formed between the outer surface of the partition part 122 of the flow path forming member 120 and the inner peripheral surface of the mounting part 171. The first space (base end side space) having a substantially semicircular cross section, the outer surface of the partition part 122 of the flow path forming member 120 and the faucet upper connection port of the water stop cock 10 continuous with the first space. 12, a second space (center space) having a substantially semicircular cross section formed between the inner peripheral surface of 12, the outer peripheral surface of the rotating portion 121 of the flow path forming member 120, and the stopcock 10 (three connections). It is formed from a substantially annular third space (front end side space) formed between the inner peripheral surface (at the connecting portion of the mouths 11, 12, 13). Further, the second space of the outflow path R2 is a space formed between the outer surface of the partition part 122 of the flow path forming member 120 and the inner peripheral surface of the faucet upper connection port 12 portion of the stop cock 10. And a space formed between the outer surface of the tapered portion 123 of the flow path forming member 120 and the inner peripheral surface of the faucet upper connection port 12 portion of the water stop cock 10.

  Here, as described above, the pressure reducing valve 100 moves the flow path forming member 120 to the side portion of the valve body 110 so as to protrude substantially orthogonally to the axial direction of the outer wall 117 at a position facing the water pressure control chamber 130. Are integrally formed. A part of the base end side portion of the flow path forming member 120 extends into the valve body 110, and the base end side opening is a flow path communicating with the water stop chamber 111 adjacent to the water pressure control chamber 130. It communicates with the base end of W1. The primary pressure chamber P1 is formed between the inner peripheral surface of the lower end portion of the bulging portion 132 and the insertion portion 131 of the hydraulic pressure control chamber 130 and the outer peripheral surface of the rod portion 144 of the valve rod 140. It has a generally annular shape. Further, the secondary pressure chamber P2 has a substantially annular shape formed between the outer peripheral surface of the hydraulic pressure control chamber 130 and the inner peripheral surface of the outer wall 117 opposed thereto. Further, the secondary pressure chamber P2 has a larger diameter than the primary pressure chamber P1. Furthermore, the valve main body 110 has a flow path orthogonal to the inflow path R1 between the inflow path R1 of the flow path forming member 120 and the water pressure control chamber 130, that is, on the water flow path on the downstream side of the water pressure control chamber 130. The water stop chamber 111 is arranged via W1. In addition, the flow path forming member 120 has the inflow path R1 and the outflow path R2 convergingly arranged on the base end side. On the other hand, the flowing water path composed of the flow path W1 of the valve body 110 and the water stop chamber 111 forms an angled flowing water path with respect to the flowing water path R1 of the flow path forming member 120 extending in parallel with the primary side pipe. Further, the primary pressure chamber P1 and the secondary pressure chamber P2 formed of the water pressure control chamber 130 are an angled water flow path with respect to the outflow path R2 that extends adjacent to and parallel to the inflow path R1 of the flow path forming member 120. Form. That is, in this embodiment, the flow path W1, the water stop chamber 111, the water pressure control chamber 130 as the primary pressure chamber P1, and the secondary pressure chamber P2 are converged and arranged on the proximal end side of the flow path forming member 120. Between the inflow path 41 and the outflow path R2, the flowing water path from the inflow path R1 to the outflow path R2 is formed in a circular shape so as to be a substantially shortest path and a flowing water path that smoothly flows. ing. Thereby, the pressure reducing valve 100 forms a polygonal circulating water flow path as a whole, and has a compact configuration as a whole.

Operation and Effect Next, the operation and effect of the pressure reducing valve 100 according to the present embodiment will be described with reference to FIGS. The white arrow in FIG.7 and FIG.8 shows a water flow direction thru | or a water flow path. First, as an example, a description will be given of a case where the pressure reducing valve 100 is used by being attached to an angle stop cock 10 of a water supply pipe. The pressure reducing valve 100 is connected to a faucet upper connection port of the stop cock 10 through a connection portion 170. 12, the flow path forming member 120 is inserted into the faucet upper connection port 12 of the stop cock 10 and the top packing 125 is seated on the valve seat 14 of the stop cock 10 as described above. Thus, the inflow path R1 inside the flow path forming member 120 and the valve hole of the valve seat 14 are communicated in a watertight manner. Here, when tap water is caused to flow from the pipe 21 to the stop cock 10 with the stopper rod 181 of the stop means being in the open position, the tap water is supplied from the inlet side connection port 11 of the stop cock 10 to the valve seat. It flows into the inflow path R1 in the flow path forming member 120 of the pressure reducing valve 100 through the 14 valve holes. At this time, the tap water flows into the inflow path R <b> 1 in the flow path forming member 120 through the circular hole and the circular hole 121 b of the top packing 125 at the tip of the flow path forming member 120. Here, since the inflow channel R1 reduces the cross-sectional area at the tapered portion 123 portion, the inflowing tap water is water pressure controlled by the fluid resistance in the tapered space (tapered inner peripheral surface) of the tapered portion 123. Then, it flows into the semi-cylindrical space of the partition part 122 and flows into the flow path W1 of the valve body 100. Next, after the tap water flows into the water stop chamber 111 from the water stop valve seat 112 of the water stop chamber 111, the adjacent water pressure control chamber 130 passes through the strainer 191 from the outlet 115 of the water stop chamber 111. It flows into the primary pressure chamber P1 in the inside (see the numeral “1” portion in FIGS. 7 and 8). At this time, even when the tap water contains dust, the passage is blocked by the strainer 191 and does not flow into the water pressure control chamber 131 and thereafter. As a result, it is possible to prevent problems with water pressure control means due to garbage biting and the like and downstream (downstream) watering devices. Further, when it is necessary to replace or clean the strainer 191 due to clogging due to use, etc., by inserting a tool such as a flathead screwdriver into the locking groove 186c of the cap 186 and rotating the cap 186 counterclockwise, The cap 186 can be screwed out and removed from the opening 116 of the valve body 110. Further, the cap 186 can be detached from the stopper rod 181 and removed, and the strainer 191 is disposed at a position downstream of the water stop valve seat 112. As a result, the cap rod 181 is moved forward, the water stop top 182 is seated on the water stop valve seat 112 to be in the water stop position, and the water flow into the water stop chamber 111 is stopped. By removing the valve body 110 from the valve body 110, the inside of the water stop chamber 111 is exposed, and the strainer 191 can be easily replaced or cleaned.

  The tap water that has flowed into the water pressure control chamber 130 is regulated to move straight by the inner peripheral surface of the bulging portion 132 of the water pressure control chamber 130, and the water pressure is increased along the inner peripheral surface of the bulging portion 132 or the outer peripheral surface of the rod portion 144. It flows so as to go around the substantially annular primary pressure chamber P1 in the control chamber 130. Thereafter, the tap water flows downward from the valve hole of the pressure regulating valve seat 133 of the water pressure control chamber 130. Then, the tap water flows so as to circulate around the rod portion 144 in the space between the pressure regulating valve seat 133 and the pressure regulating top 146 and flows out into the secondary pressure chamber P2 in the outer wall 117 ( (See the numeral “2” in FIGS. 7 and 8). At this time, the water pressure (feed water pressure) of the tap water flowing out from the primary pressure chamber P1 is adjusted and controlled according to the gap (interval) between the pressure regulating valve seat 133 and the pressure regulating top 146. Thereafter, the tap water passes from the secondary pressure chamber P2 to the gap between the mounting portion 171 of the connecting portion 170 and the rotating portion 121 of the flow path forming member 120 (the first space to the proximal side space of the outflow passage R2). ) And flows into the faucet connection port 12 of the stop cock 10. Subsequently, the tap water flows from the first space (base end side space) of the outflow passage R2 through the second space (central space) to the third space (tip end side space), and the stop cock 10 The valve seat 14 part of the valve seat 14 is restricted from going straight and flows around the circulation part 121 of the flow path forming member 120, and then flows into the outflow side connection port 13 of the water stop cock 10, and is connected to the outflow side. It flows out from the mouth 13 to the water supply pipe 22.

  Here, the pressure reducing valve 100 is in a fully open state in which the pressure regulating top 146 is fully separated from the pressure regulating valve seat 133 in a state where the tap water flowing through the internal space is pressure-adjusted. The tap water on the side (pipe 21 side) is depressurized and flows to the secondary side (water supply pipe 22 side). On the other hand, when the stop valve of the water supply equipment such as a water faucet on the secondary side is closed, a part of the tap water that has flowed out after being depressurized to the secondary side is left side of the pressure regulating piston 150 (secondary side The side pressure chamber P2) is filled. Then, the water pressure on the secondary side increases. At this time, the water flow that fills the left side of the pressure regulating piston 150 acts as a force that pushes up the pressure regulating piston 150 against the spring force of the pressure regulating spring 160. Due to the pressure of the water flow, the pressure adjusting top 146 approaches the pressure adjusting valve seat 133 from the fully opened state to reduce the gap with the pressure adjusting valve seat 133 or is seated on the pressure adjusting valve seat 133 to be primary. The water flow flowing out from the side pressure chamber P1 is further regulated. Therefore, the water pressure rise on the secondary side is suppressed. And the pressure by the said water flow finally balances with the spring load of the pressure regulation spring 160, and keeps the secondary side water pressure constant. Further, when the stop valve of the water-side appliances on the secondary side is opened again and the tap water is allowed to flow through the space in the pressure reducing valve 100, the water pressure on the secondary side decreases. Then, the spring load of the pressure adjusting spring 160 overcomes the upward force acting on the pressure adjusting piston 150, and the pressure adjusting top 146 is separated from the pressure adjusting valve seat 133 and leaves a gap with the pressure adjusting valve seat 133. Enlarged or the fully opened state. And the tap water pressure-reduced from the primary side pressure chamber P1 flows out to a secondary side, and keeps the water pressure of a secondary side constant.

  At this time, the water stop chamber 111 from the water supply pipe 22, the stop cock 10, the outflow passage R2, the secondary pressure chamber P2 and the like on the secondary side of the water flow path passes through the water pressure control chamber 130 as the primary pressure chamber P1. When tap water flows backward, the water stop top 182 of the water stop means functions as a check valve. That is, when water flows backward from the secondary side (outflow path R2 side), the inside of the water stop chamber 111 becomes positive pressure, and the inflow path R1 side (flow path W1 side) of the flow path forming member 120 becomes negative pressure. The water stop top 182 separated from the water stop valve seat 112 is separated (protruded) from the distal end surface of the plug bar 181 by the urging force of the water stop spring 184 and is seated on the water stop valve seat 112 to stop the water stop. The valve hole of the valve seat 112 is shielded to prevent back flow of tap water.

  Here, when it is desired to shut off and stop water flow to the secondary side pipe 22 in order to replace a watering device or the like attached to the secondary side pipe 22, the operation portion 181c of the stopper rod 181 of the water stop means is set. By rotating clockwise from the outside by a flathead screwdriver or the like, the stopper rod 181 moves forward, the water stop top 182 sits on the water stop valve seat 112 and closes its valve hole, and the flow on the primary side The flowing water from the inflow path R1 of the path forming member 120 is blocked. Thereafter, when it is desired to resume the water flow to the secondary side pipe 22, the operation portion 181c of the stopper rod 181 of the water stopping means at the water stopping position is rotated counterclockwise from the outside, so that the stopper rod 181 The water stop top 182 moves away from the water stop valve seat 112 and opens its valve hole to the open position, allowing passage of flowing water from the inflow passage R1 of the flow path forming member 120 on the primary side. . Thus, the pressure reducing valve 100 of the present embodiment can also be used as a water stop cock by the water stop means. Further, by adjusting the movement of the stopper rod 181 between the water stop position and the open position, the gap between the water stop top 182 and the water stop valve seat 112 is adjusted to increase and decrease to the water stop chamber 111. The amount of tap water inflow can be adjusted, and the flow rate can be adjusted in the pressure reducing valve 100.

Installation Work Next, the installation work (attachment method) to the stop cock 10 of the pressure reducing valve 100 according to the present embodiment will be briefly described. First, from the stop cock 10 interposed between the pipe 21 and the water supply pipe 22, the cap nut on the faucet is turned counterclockwise to remove the upper part of the faucet from the stop cock 10. At this time, the top of the faucet is also removed from the stop cock 10 together. Next, the connecting portion 170 of the pressure reducing valve 100 is brought close to the faucet upper connection port 12 of the stop valve 10, and the cap nut 172 of the connecting portion 170 of the pressure reducing valve 100 is connected to the upper portion of the faucet 10. It is fitted to the mouth 12 and turned clockwise. Accordingly, as shown in FIG. 7, the pressure reducing valve 100 can be attached and fixed to the faucet upper connection port 12 of the stop cock 10. At this time, it is preferable to attach the pressure reducing valve 100 to the water stop cock 10 so that the valve body 100 is horizontal or vertical (that is, the spring cover 118 is sideways or upward).

  The pressure reducing valve 100 according to the present embodiment configured as described above can be reduced in size and size as a whole, and when attached to a stop cock 10 such as an angle stop cock of a water supply pipe, By simply removing the faucet upper part (handle) from the faucet 10 and replacing it with the faucet upper part, the faucet can be easily and quickly attached to the faucet 10, piping work can be easily performed, and the water stop function Can also be demonstrated. In other words, the pressure reducing valve 100 according to the present embodiment is a simple type pressure reducing valve that is attached to the primary side of a water purifier or the like in addition to a water faucet. Protects water-related equipment such as dishwashers, water purifiers (under-sink type water purifiers, bath water purifiers, RO water purifiers, etc.), alkaline ion water purifiers, etc. It is possible to extend the life of the water faucet and the consumables of the water faucet (ceramic cartridge, Kelep, etc.). In addition, the pressure reducing valve 100 according to the present embodiment can reduce water hammer in an area where the water supply pressure is high and can suppress the water force, so that it is possible to prevent water splashing at the time of water discharge at the sink. . Furthermore, since the pressure reducing valve 100 according to the present embodiment keeps the secondary water pressure constant, the water purifying performance of the water purifier can be stably extracted, and in addition, the watering range of the automatic water sprinkler etc. can be made constant. can do. On the other hand, the pressure reducing valve 100 according to the present embodiment can be used as a water stop cock by tightening the stopper rod of the water stop means, and can exhibit functions such as flow rate adjustment and water stop, Etc. can be easily performed. Furthermore, since the pressure reducing valve 100 according to the present embodiment is a faucet upper exchange type that can be replaced by removing the handle upper part such as the faucet upper part of the faucet to be attached such as the stop cock 10, Anyone can easily change with one tool such as a spanner. It can also be attached to individual watering devices such as a water purifier, and can easily reduce the pressure or hold the pressure of the watering device for which pressure reduction or pressure is to be kept constant. Further, since the water pressure control means employs a pressure balance system using a pressure regulating piston, a valve rod, etc., the secondary pressure can be kept constant without being influenced by the primary pressure. In addition, since the water pressure control means adopts a piston system using a pressure regulating piston instead of the conventional diaphragm system, there is no problem such as the diaphragm film breaking, and the durability is excellent. Thus, since the pressure reducing valve 100 according to the present embodiment is excellent in durability, it is possible to greatly reduce the labor of management after installation. Furthermore, since the pressure reducing valve 100 according to the present embodiment incorporates a strainer in the water stop chamber, it is possible to protect the watering devices from problems due to garbage biting and the like, and the strainer itself is removed in a water stop state. It can be easily cleaned and replaced. Moreover, since the water stop means incorporates the water stop top as a check top, the back flow from the primary side can be reliably prevented. Furthermore, since the pressure reducing valve 100 according to the present embodiment has a structure in which the water stop chamber and the water pressure control chamber are compactly arranged as described above, the pressure reducing valve 100 has both functions of a pressure reducing valve function and a water stop cock function. The whole is ultra-compact and has a space-saving design, and can support space-savings such as under the sink.

  By the way, the pressure reducing valve of the present invention can be used as a pressure reducing valve for the liquid by installing it in an arbitrary liquid piping, in addition to being used as the pressure reducing valve for the stop cock of the above embodiment. . Further, the pressure reducing valve of the present invention can be used by being attached to a water stop cock or a piping component other than the angle water stop cock of the above embodiment.

FIG. 1 is a cross-sectional view showing the internal structure of a pressure reducing valve according to an embodiment of the present invention cut along the axial center of a water stop chamber of a valve body. FIG. 2 is a cross-sectional view showing the internal structure of a pressure reducing valve according to an embodiment of the present invention cut along the outer wall of the valve body or the axial center of the water pressure control chamber. FIG. 3 is a side view showing a pressure reducing valve according to an embodiment of the present invention. FIG. 4 is a front view showing a pressure reducing valve according to an embodiment of the present invention. FIG. 5 is a perspective view showing a state in which the cap of the pressure reducing valve according to the embodiment of the present invention is attached to the valve body. FIG. 6 is a perspective view showing a state where the cap of the pressure reducing valve according to the embodiment of the present invention is removed from the valve body and the strainer is taken out from the water stop chamber of the valve body. FIG. 7 is a cross-sectional view showing the flowing water path in the state where the pressure reducing valve according to the embodiment of the present invention is attached to the water stop cock in the cross-sectional structure of FIG. FIG. 8 is a cross-sectional view showing the water flow path in the state where the pressure reducing valve according to the embodiment of the present invention is attached to the water stop cock in the cross-sectional structure of FIG.

10: Stop valve, 11: Inlet side connection port, 12: Connection port for faucet upper part, 13: Outlet side connection port, 14: Valve seat, 100: Pressure reducing valve, 110: Valve body, 111: Water stop chamber, 112 : Valve seat for water stop 117: Outer wall, 120: Flow path forming member, 121: Circulation part, 122: Partition part 123: Tapered part, 130: Water pressure control chamber, 133: Valve seat for pressure regulation 140: Valve rod (water pressure control Means), 146: Pressure regulating top (water pressure control means)
150: Pressure regulating piston (water pressure control means), 160: Pressure regulating spring (biasing member) (water pressure control means)
170: connection portion, 171: mounting portion, 181: plug rod (water stop means), 181d: storage portion 182: water stop top (water stop means), 183: top shaft, 184: check spring (biasing member)
186: Cap, 191: Strainer P1: Primary pressure chamber, P2, Secondary pressure chamber, R1: Inflow path, R2: Outflow path

Claims (13)

An inflow side connection port connected to the primary side of the water supply piping path, a faucet upper connection port disposed facing the axial direction of the inflow side connection port, the inflow side connection port, and the faucet An outflow side connection port disposed in a direction intersecting with a line connecting the upper connection port and connected to the secondary side of the piping path, and a flowing water path between the inflow side connection port and the outflow side connection port The valve seat is disposed on the faucet upper connection port, and the top is accommodated in the faucet upper connection port. The front end surface of the top is seated on the valve seat. A pressure reducing valve used by connecting to the faucet upper connection port of a water faucet provided with a water faucet upper portion that is watertightly closing the valve seat,
A valve body having a primary pressure chamber and a secondary pressure chamber communicating with each other;
A water pressure control means provided in the primary pressure chamber of the valve body, for controlling the water pressure of the secondary pressure chamber;
A connection part that is provided in the valve body and has a substantially annular shape that is watertightly connectable to a connection port for a faucet upper part of a stop cock;
The valve body has a tubular shape communicating with the base end side, and when the connection portion is connected watertight to the faucet upper connection port of the stopcock, the faucet upper connection port of the stopcock Is inserted axially into the interior of the water stop so that its tip is seated in a watertight manner on the valve seat of the stop cock, and the primary pressure chamber is connected to the inflow side of the stop cock through the valve seat of the stop cock An outflow path that forms an inflow path that communicates with the connection port, and that communicates the secondary pressure chamber with the outflow side connection port of the water stopcock between the outer peripheral surface and the inner peripheral surface side of the connection portion A flow path forming member for forming
A water stop that is disposed between the inflow path and the outflow path of the flow path forming member and is movable between an open position that opens between the inflow path and the outflow path and a blocking position that shuts off watertightly. and means,
The flow path forming member concentrically arranges the inflow path and the outflow path on the base end side thereof,
The valve body further includes a substantially cylindrical water stop chamber that houses the water stop means, and a substantially cylindrical water pressure control chamber as the primary pressure chamber that houses the water pressure control means, The secondary pressure chamber is adjacently arranged on the downstream side outside the water pressure control chamber, and is converged and arranged on the base end side of the flow path forming member by the water stop chamber, the water pressure control chamber, and the secondary pressure chamber. A pressure reducing valve characterized in that a flowing water path extending from the inflow path to the outflow path is formed between the inflow path and the outflow path . An inflow side connection port connected to the primary side of the water supply piping path, a faucet upper connection port disposed facing the axial direction of the inflow side connection port, the inflow side connection port, and the faucet An outflow side connection port disposed in a direction intersecting with a line connecting the upper connection port and connected to the secondary side of the piping path, and a flowing water path between the inflow side connection port and the outflow side connection port The valve seat is disposed on the faucet upper connection port, and the top is accommodated in the faucet upper connection port. The front end surface of the top is seated on the valve seat. A pressure reducing valve used by connecting to the faucet upper connection port of a water faucet provided with a water faucet upper portion that is watertightly closing the valve seat,
A valve body having a primary pressure chamber and a secondary pressure chamber communicating with each other;
A water pressure control means provided in the primary pressure chamber of the valve body, for controlling the water pressure of the secondary pressure chamber;
A connection part that is provided in the valve body and has a substantially annular shape that is watertightly connectable to a connection port for a faucet upper part of a stop cock;
The valve body has a tubular shape communicating with the base end side, and when the connection portion is connected watertight to the faucet upper connection port of the stopcock, the faucet upper connection port of the stopcock Is inserted axially into the interior of the water stop so that its tip is seated in a watertight manner on the valve seat of the stop cock, and the primary pressure chamber is connected to the inflow side of the stop cock through the valve seat of the stop cock An outflow path that forms an inflow path that communicates with the connection port, and that communicates the secondary pressure chamber with the outflow side connection port of the water stopcock between the outer peripheral surface and the inner peripheral surface side of the connection portion A flow path forming member for forming
A water stop that is disposed between the inflow path and the outflow path of the flow path forming member and is movable between an open position that opens between the inflow path and the outflow path and a blocking position that shuts off watertightly. Means and
The tubular flow path forming member has a shape and size whose front end surface substantially coincides with the seating surface of the valve seat of the water stop cock, and is reduced to reduce the size from the front end side toward the base end side. A portion corresponding to the inner peripheral surface of the connecting portion on the proximal end side of the reduced portion of the flow path forming member, and the outflow path between the inner peripheral surface of the connecting portion. A pressure reducing valve characterized by forming.   The flow path forming member forms a substantially tapered peripheral wall in which the opening on the distal end surface is substantially circular and one radial side portion of the length direction on the distal end side is inclined toward the center. In addition, the other side portion in the radial direction is a tapered portion forming a substantially semi-cylindrical peripheral wall, while the portion on the base end side from a part in the length direction on the distal end side is a substantially half cylinder in the other side portion in the radial direction. 3. The pressure reducing valve according to claim 2, wherein the pressure reducing valve is a partition portion forming a substantially semi-cylindrical peripheral wall having substantially the same cross section that is continuous with the substantially peripheral wall, and the base end side opening is substantially semi-circular.   A portion of the flow path forming member on the tip side from a part in the length direction is a substantially cylindrical circumferential portion, and the flow path forming member is axially directed to the inside of the faucet upper connection port of the water stop cock Inserted into the valve seat of the stop cock and seated tightly on the valve seat of the stop cock, at the boundary between the circulation part and the partition part of the flow path forming member and the outlet side connection port of the stop cock 4. A decompression system according to claim 3, wherein a communication space is formed between the inner peripheral surface of the communicating pipe portion and the outflow path and the outflow side connection port of the stop cock. valve.   The connecting portion protrudes substantially orthogonally from the outer peripheral surface of the valve main body, surrounds the outer periphery of the base end portion of the partition portion of the flow path forming member, and the string side of the substantially semi-cylindrical partition portion The valve body has a cylindrical shape integrally formed so as to form a substantially semi-cylindrical space, and has a mounting portion that can be connected in a watertight manner to the faucet upper connection port of the stop cock. The pressure reducing valve according to claim 4.   The valve main body includes a substantially cylindrical water stop chamber that houses the water stop means, and a substantially cylindrical water pressure control chamber as the primary pressure chamber that houses the water pressure control means, and the water pressure control The pressure reducing valve according to any one of claims 1 to 5, wherein the chamber and the water stop chamber are integrally formed such that their axial directions are substantially orthogonal to each other. The pressure reducing valve according to claim 1 or 6 , wherein the valve body has the water stop chamber disposed on a water flow path between an inflow path of the flow path forming member and the water pressure control chamber. The valve body has a substantially cylindrical outer wall that surrounds the water pressure control chamber, opens one end in the axial direction of the water pressure control chamber to form a pressure regulating valve seat, and places the water pressure control chamber in the outer wall. Extending in the axial direction, forming the secondary pressure chamber so as to communicate between the outer wall and the hydraulic control chamber via the pressure regulating valve seat,
The water pressure control means includes a valve rod disposed so as to be reciprocally movable in the axial direction inside the water pressure control chamber of the valve body, and the pressure regulating valve fixed to the tip of the valve rod and outside the water pressure control chamber. A pressure-controlling top that is slidably opposed to the seat and moves toward or away from the pressure-control valve seat as the valve stem moves, and is fixed coaxially to the base end of the valve stem and the secondary side A pressure adjusting piston disposed in the pressure chamber; and an urging member for urging the pressure adjusting piston in the axial direction, wherein the urging member is urged according to a water pressure in the secondary pressure chamber. 8. The pressure reducing device according to claim 1 , wherein the pressure adjusting top is moved closer to or away from the pressure adjusting valve seat via the valve rod by moving in the axial direction by an urging force. valve. The water stop chamber of the valve body forms a water stop valve seat by opening one end in the axial direction,
The water stop means is disposed inside the water stop chamber and has a stopper rod that can be operated from the outside of the valve main body to move back and forth in the axial direction in the water stop chamber. A stopper which is fixed to the tip of the stopper rod and is slidably opposed to the water stop valve seat inside the water stop chamber, and approaches or separates from the water stop valve seat as the stopper rod moves. A water top, and by moving the stopper rod forward and seating the water stop on the water stop valve seat, water flowing between the water flow path and the outflow path of the flow path forming member The pressure reducing valve according to claim 1 , wherein the pressure reducing valve is cut off. The water stop means further includes a housing portion extending in the axial direction from the tip of the plug rod to the inside, and a top shaft that is reciprocally inserted into the housing portion of the plug rod, A biasing member disposed on an outer periphery of the top shaft in the housing portion, and the water stop top is fixed to a tip end of the top shaft, and the water stop top is fixed to the water stop valve seat by the biasing member. The pressure reducing valve according to claim 9 , wherein the pressure stop valve causes the water stop top to function as a check top. 11. The pressure reducing valve according to claim 9 , further comprising a strainer disposed in a downstream side of a moving range of the water stop piece inside the water stop chamber. The water stop means further includes a cap for fixing the base end portion of the plug rod to the valve body, and the cap is separated from the plug rod to be removable, and the plug rod is moved forward. The reduced pressure according to claim 11, wherein the inside of the water stop chamber is freely exposed by removing the cap from the valve body in a state where the water stop top is seated on the water stop valve seat. valve. An inflow side connection port connected to the primary side of the liquid piping path, a connection port for an upper part of the liquid stopper arranged opposite to the axial direction of the inflow side connection port, the inflow side connection port, and the liquid plug An outlet connecting port connected to the secondary side of the piping path, and a path between the inlet connecting port and the outlet connecting port, arranged in a direction crossing a line connecting the upper connecting port; A valve seat, and a top that is attached to the connection port for the upper part of the liquid stopper, and that is accommodated in the inside from the connection port for the upper part of the liquid stopper, and the tip surface of the top is seated on the valve seat. A pressure reducing valve used by connecting to the liquid stopper upper connection port of a liquid stopper having a liquid stopper upper portion that is capable of liquid-tightly closing the valve seat,
A valve body having a primary pressure chamber and a secondary pressure chamber communicating with each other;
A hydraulic pressure control means provided in the primary pressure chamber of the valve body for controlling the hydraulic pressure of the secondary pressure chamber;
A connection part that is provided in the valve main body and has a substantially annular shape that can be liquid-tightly connected to a connection port for a liquid stopper upper part of a stopcock;
Formed in a tubular shape communicating with the inside of the valve body on the proximal end side, and when the connection portion is liquid-tightly connected to the liquid stopper upper connection port of the liquid stopper, the connection for the liquid stopper upper portion of the liquid stopper It is inserted axially into the mouth and its tip is seated liquid tightly on the valve seat of the stopcock, and the primary pressure chamber is connected to the stopcock of the stopcock through the valve seat of the stopcock. While forming an inflow path communicating with the inflow side connection port, the secondary side pressure chamber is communicated with the outflow side connection port of the liquid stopper between the outer peripheral surface and the inner peripheral surface side of the connection portion. A flow path forming member that forms an outflow path;
A stop that is disposed between the inflow path and the outflow path of the flow path forming member and is movable between an open position that opens between the inflow path and the outflow path and a blocking position that blocks liquid tightly. Liquid means ,
The flow path forming member concentrically arranges the inflow path and the outflow path on the base end side thereof,
The valve body further includes a substantially cylindrical liquid stop chamber that houses the liquid stop means, and a substantially cylindrical liquid pressure control chamber as the primary pressure chamber that houses the liquid pressure control means. The secondary pressure chamber is disposed adjacent to the downstream side of the hydraulic pressure control chamber, and the proximal end side of the flow path forming member is formed by the liquid stop chamber, the hydraulic pressure control chamber, and the secondary pressure chamber. A pressure reducing valve characterized in that a fluid flow path extending from the inflow path to the outflow path is formed in a circular shape between the inflow path and the outflow path that are concentrically arranged .

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