JP5674591B2 - Water stop cock with secondary water stop function - Google Patents

Description

  The present invention relates to a stopcock (a stopcock with a check valve) having a backflow prevention function installed in a water supply pipe for guiding tap water from a water main to each home such as a detached house or an apartment house. In particular, when replacing check valve parts (check valve body with a valve body packing), without using a tool with the stop cock installed in the water supply line. The secondary side of the check valve can be easily and easily stopped, and the tap water remaining in the secondary side water supply pipe can be prevented from flowing back and overflowing from the stop cock to the outside. This relates to a water stop cock with a secondary water stop function.

Conventionally, as a stop cock provided with a backflow prevention function, for example, a stop cock with a check valve disclosed in JP 2001-020329 A (Patent Document 1) is known.

  That is, as shown in FIG. 7, the stop cock with a check valve includes a main body body 40 having an inlet 40a, a stop cock chamber 40b, a water inlet 40c, a check valve chamber 40d, and an outlet 40e, and a stopper. A ball 41 is provided in the check valve chamber 40d, and is provided in the check valve chamber 40d. The water inlet 40c is opened by the forward flow (flow from the inlet 40a to the outlet 40e), and the water outlet 40c is closed by the reverse flow of tap water (flow from the outlet 40e to the inlet 40a). The check valve 42 and the like are configured.

  Further, as shown in FIG. 7, the check valve 42 is accommodated in the valve seat surface 40f formed at the inner peripheral edge of the water flow opening 40c on the check valve chamber 40d side and in the check valve chamber 40d so as to be movable in the vertical direction. The check valve body 43, the valve body packing 44 which is attached to the check valve body 43 and is separated from the valve seat surface 40f, and the back side of the check valve body 43 are provided. When the tap water flows from the inlet 40a to the outlet 40e, the pressure of the tap water reaching the water inlet 40c is increased. The check valve body 43 is pushed up against the elastic force of the spring 45 to open the water passage 40c, permitting the flow of tap water from the inlet 40a side to the outlet 40e side, and the tap water flows back. When trying to do so, the check valve body 43 Pushed down by sex force closes the passage Mizuguchi 40c, so as to prevent backflow of tap water to the inlet 40a from the outlet 40e.

  By the way, if the check valve 42 does not function normally due to the check valve body 43 being caught by foreign matter such as dust, wear of the valve body packing 44, or secular change, Risk of accidents.

  For example, in a directly connected water supply line, the water main and the faucet (faucet) in the building are directly connected to each other via a water pipe, etc. When water is cut off due to renewal work etc., tap water in the water supply pipe tends to flow down from the high place side to the low place side, and the pressure in the water supply pipe is lower than the atmospheric pressure (negative pressure state). If water is poured in a state where the hose attached to the faucet is immersed in the bathtub, unsanitary tap water may be taken into the water mains due to backflow due to negative pressure.

  Therefore, in the stop cock with a check valve installed in the water supply pipe, it is necessary to maintain and manage the backflow prevention performance. It is recommended that the valve body 43) be replaced regularly.

  When the check valve body 43 of the check valve 42 of the stopcock with check valve installed in the water supply pipe is replaced, as shown in FIG. 8, the ball 41 is rotated to the closed position to check the check valve. 42, after stopping the flow of tap water from the water main, the packing box 46 is removed from the main body 40, the check valve chamber 40d is opened, and the reverse in the check valve chamber 40d is opened. The valve stop 43 is replaced with a new one.

  However, since the stop cock with the check valve cannot stop the secondary side of the check valve 42, when the packing box 46 is removed from the main body body 40 and the check valve body 43 is taken out, The tap water remaining in the water supply pipe on the secondary side of the stop valve with a check valve flows backward and overflows from the main body trunk 40 and falls outside.

At this time, if a stop cock with a check valve is installed in an outdoor meter box, the overflowing return water penetrates into the ground, but if there is a large amount of water, the overflowing return water becomes contaminated water. There is a possibility of entering a stop cock with a check valve.
In addition, when a stop valve with a check valve is installed indoors such as in a housing complex, a large amount of return water overflows from the stop valve with a check valve when the check valve body is replaced, and enters the building. There is a risk of damaging residents.

In this way, the conventional stop cock with a check valve is configured such that when the check valve body 43 is removed from the main body body 40 when the check valve body 43 is replaced, water remaining in the secondary side water supply pipe is removed. There is a problem that it takes time to remove the water because the water flows backward and overflows.
In addition, when a check valve with a check valve is installed in an outdoor meter box, if there is a large amount of secondary-side return water that overflows when the check valve body 43 is replaced, the water becomes reverse as contaminated water. There is a risk of entering a stop cock with a stop valve.
Furthermore, when a stop cock with a check valve is installed indoors such as in a housing complex, a large amount of return water overflows from the stop cock with a check valve when the check valve body 43 is replaced, and enters the building. May cause damage to residents.

JP 2001-020329 A

  The present invention has been made in view of such problems, and its purpose is to use a tool with the stop cock itself installed in the water supply line when replacing the check valve parts. The secondary side of the check valve can be stopped without causing the tap water remaining in the water supply pipe on the secondary side to flow backward and overflow from the stop cock to the outside. The purpose is to provide a water stop cock with a secondary water stop function.

In order to achieve the above-mentioned object, the invention of claim 1 of the present invention partitions the stop cock chamber communicating with the inflow port, the check valve chamber communicating with the outflow port, the stop cock chamber and the check valve chamber. A body body having a water passage opening formed in the partition wall and communicating with the water stop cock chamber and the check valve chamber, and is accommodated in the water stop cock chamber so as to be freely rotatable. A check valve that is provided in a check valve chamber with a ball having a water passage hole to be in a communicating state, and that opens the water flow port by the forward flow of tap water and closes the water flow port by the reverse flow of tap water. A cylinder with a valve and an annular second valve packing that is arranged around the check valve, is operably mounted on the body barrel, and is movable and adjustable. The second valve body is moved and adjusted to move the second valve body packing to the check valve chamber side. When brought into contact with the wall, a configuration in which the water stopping the secondary side of the check valve surrounds the check valve, further, the second valve body to face the lower end in the check valve chamber The second valve body presser and the cylindrical second valve body presser having a notch portion screwed to the main body barrel, the upper part protruding from the main body barrel of the second valve body is screwed to the main body barrel so as to be movable and adjustable. The lower part of the second valve body presser can be operated to rotate by being partially covered with a packing box opened at the lower part that also serves as a cover of the check valve chamber screwed to the inner peripheral surface of the valve body presser. There is a special feature.

According to the invention of claim 2 of the present invention, the second valve body has a flange portion facing the notch portion of the second valve body presser on the outer peripheral surface of the upper end portion, and a knurl is formed on the outer peripheral surface of the flange portion. There is a special feature.

The invention according to claim 3 of the present invention is provided with an opening degree adjusting mechanism for adjusting the opening degree of the check valve in the packing box, and the opening degree adjusting mechanism is rotatable in a state penetrating the packing box and not movable in the axial direction. The stopper rod is formed with a male threaded portion on the outer peripheral surface of the lower end, the round handle attached to the upper end of the stopper rod, and the male threaded portion of the stopper rod. It consists of a valve body presser that is movably accommodated to support the check valve and that comes into contact with the check valve pushed up by water pressure, and the plug bar has an air vent hole that vents air from the check valve chamber, and an air vent It is characterized by having a handle stop screw for closing the opening of the hole.

Since the stop cock with a secondary side water stop function of the present invention is configured to include a second valve body that can be moved and adjusted from the outside in the main body and stops the secondary side of the check valve, When the part (check valve body) is replaced, the secondary side of the check valve can be stopped with the stop cock itself installed in the water supply line by operating the second valve body. Therefore, the return water remaining in the water supply pipe on the secondary side of the stop cock does not overflow from the stop cock, and the work for removing the return water is not required and the working time is greatly shortened. Can do.
In addition, since the water stop cock with a secondary side water stop function of the present invention can stop the secondary side of the check valve when replacing the check valve parts, the contaminated water due to the return water on the secondary side No worries about the occurrence of intrusion or entering the building.
Therefore, if the water stop cock with the secondary side water stop function of the present invention is used, the water stop on the secondary side of the check valve can be easily and easily performed, and the check valve parts can be replaced without any problem. The work time can be shortened, and problems such as inundation accidents in the building can be solved.

  In the stop cock with a secondary side water stop function of the present invention, the second valve body is screwed to the main body barrel so that the lower end portion faces the check valve chamber so as to be freely adjustable. The upper part protruding from the body of the valve body is partially covered by the second valve body presser and the packing box and can be rotated from the notch formed in the second valve body presser, so a tool is used. Without this, the secondary side of the check valve can be stopped.

  The water faucet with a secondary side water shutoff function of the present invention is such that the second valve body has a flange portion facing the notch portion of the second valve body presser on the outer peripheral surface of the upper end portion, Since the knurling is formed, the second valve body can be easily rotated, and the water stop on the secondary side of the check valve can be quickly performed.

  The water stop cock with a secondary side water stop function of the present invention is provided with an opening adjustment mechanism for adjusting the opening of the check valve in the packing box, and the stopper rod of the opening adjustment mechanism is provided with air in the check valve chamber. Air removal hole and a handle stop screw that closes the opening of the air release hole. Remove the handle stop screw and check whether water comes out of the air release hole. Since it can be confirmed whether or not water is reliably stopped by the second valve body, it is possible to reliably prevent the return water on the secondary side from overflowing.

It is a front view of the stop cock with a secondary side water stop function concerning an embodiment of the invention. It is a side view of a stop cock with a secondary side water stop function. It is an enlarged vertical front view of the water stop cock with a secondary side water stop function. It is an expansion vertical side view of the water stop cock with a secondary side water stop function. It is an expanded vertical front view of the state which stopped the primary side and secondary side of the water stop cock with a secondary side water stop function. It is a vertical front view at the time of check valve replacement | exchange of the water stop cock with a secondary side water stop function. It is an enlarged vertical front view of a conventional stop valve with a check valve. It is a vertical front view at the time of check valve exchange of the conventional stop cock with a check valve.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 6 show a stop cock with a secondary water stop function according to an embodiment of the present invention, and the stop cock with a secondary water stop function is a tap water from a water main. It is installed in a directly connected water supply system (such as in the middle of a water supply pipe or on the primary side of a water meter) to lead to a home such as a house or an apartment house. It is used when the tap water must be stopped, such as for repairing appliances, and has a backflow prevention function, a secondary water stop function, a flow rate adjustment function, and an air vent function in addition to the water stop function.

  That is, as shown in FIGS. 3 and 4, the water stop cock with the secondary side water stop function has an inlet 1a, a stop cock chamber 1b, an outlet 1c, a check valve chamber 1d, a partition wall 1e, and a water inlet 1f. The main body cylinder 1 is formed, and the ball 2 is rotatably accommodated in the water faucet chamber 1b and formed with the water passage hole 2a. The main body cylinder 1 is connected to the ball 2 and is connected to the ball 2 to rotate the ball 2. A ball opening / closing operation mechanism 3 that is provided, a check valve 4 that is provided in the check valve chamber 1d and prevents backflow of tap water, and a body cylinder 1 that adjusts the opening degree (opening amount) of the check valve 4 Opening degree adjusting mechanism 5, a second valve body 6 that is operable and adjustable in movement in main body cylinder 1, and is provided in main body cylinder 1. It is comprised from the 2nd valve body presser 7 which has the notch 7a which can operate the 2 valve body 6. FIG.

Specifically, as shown in FIG. 3, the main body cylinder 1 includes an inlet 1a located on the upstream side of the water supply pipe, a stop cock chamber 1b that communicates with the inlet 1a and is open at the bottom, An outlet 1c located on the downstream side of the water supply pipe, a check valve chamber 1d that communicates with the outlet 1c and that opens upward, and a partition wall 1e that partitions the stop cock chamber 1b and the check valve chamber 1d And a water passage opening 1f which is formed in the partition wall 1e and allows the stop cock chamber 1b and the check valve chamber 1d to communicate with each other. It flows through the check valve chamber 1d to the outlet 1c.
Further, the opening of the water faucet chamber 1 b is closed by a lid-like ball presser 9 that is detachably screwed to the inner peripheral surface of the water faucet chamber 1 b of the main body barrel 1 via an O-ring 8.
Furthermore, the opening of the check valve chamber 1d includes a stepped cylindrical second valve body presser 7 that is detachably screwed to the outer peripheral surface of the opening portion of the check valve chamber 1d of the main body barrel 1, and the second valve body. The presser 7 is closed by a packing box 10 that is detachably screwed to the inner peripheral surface of the small diameter portion of the presser 7 and that also serves as a lid of the check valve chamber 1d.

  An expansion joint 11 is attached to the outlet 1 c of the main body barrel 1. The expansion joint 11 includes an expansion tube 12, an expansion tube packing 13, a guide leaf 14, a fixing cap nut 15 and a tube connecting cap nut 16.

As shown in FIG. 3, the ball 2 has a water passage hole 2 a that allows the inlet 1 a and the water inlet 1 f to be in a communication state or a non-communication state. It is rotatably accommodated via an annular ball seat 17.
The ball 2 is rotated 90 ° by a ball opening / closing operation mechanism 3 to be described later so that the open / close state is switched. When the ball 2 is in the open position (position shown in FIG. 3), the ball 2 passes through. The water hole 2a communicates with the inlet 1a and the water inlet 1f chamber, tap water entering from the inlet 1a flows into the check valve chamber 1d through the water hole 2a and the water inlet 1f, and the ball 2 When in the closed position (position shown in FIG. 5), the upstream opening of the water flow opening 1f is closed to block water flow.

As shown in FIG. 4, the ball opening / closing operation mechanism 3 is inserted into and supported by a main body barrel 1 via an O-ring 8 so as to be rotatable, and has a sub-plug bar 18 in a lateral position with a tip portion connected to the ball 2 and a main body. A sub-plug bar retainer 19 that is screwed to the barrel 1 and prevents the sub-plug bar 18 from coming off, and a lever that is detachably fitted to the base end of the sub-plug bar 18 and that rotates the sub-plug bar 18 and the ball 2. The handle 20 includes a handle cap 210 that is detachably screwed to the auxiliary stopper bar presser 19 and prevents the lever handle 20 from coming off. By rotating the lever handle 20 by 90 °, the ball 2 is opened or opened. It can be switched to the closed position.
The lever handle 20 is regulated so that the rotation angle is 90 ° by a pin 18a provided on the sub plug rod 18 and a notch (not shown) formed on the body barrel 1 and fitted with the pin 18a. Has been.
The lever handle 20 can be prevented from being stolen by removing it. At this time, a dust cap (not shown) is put on the auxiliary plug bar presser 19 so that dust does not enter the auxiliary plug bar 18 side.

As shown in FIGS. 3 and 4, the check valve 4 includes a valve seat surface 1g formed on the upper surface of the partition wall 1e on the check valve chamber 1d side at the inner peripheral edge of the water flow opening 1f, and a check valve chamber 1d. The bottomed cylindrical check valve body 22 made of synthetic resin is guided to the inner peripheral surface of the packing box 10 and is mounted on the lower surface of the check valve body 22 and is mounted on the valve seat surface 1g. The valve body packing 23 made of synthetic rubber that contacts and separates from the valve body and the back side (upper surface side) of the check valve body 22, and the back face pressing force is applied to the check valve body 22 so that the valve body packing 23 is valved. When the tap water flows from the inlet 1a to the outlet 1c, the check valve body 22 resists the elastic force of the spring 24 due to the water pressure of the tap water reaching the water inlet 1f. Then, the water passage hole 2a is opened to allow the tap water to flow from the inlet 1a to the outlet 1c. In addition, when the tap water is about to flow backward, the check valve body 22 is pushed down by the elastic force of the spring 24 to close the water passage 1f, thereby preventing the backflow of tap water from the outlet 1c to the inlet 1a. It is supposed to be.
The check valve 4 can be adjusted in flow rate by adjusting the opening degree (opening amount) by an opening degree adjusting mechanism 5 described later.

As shown in FIGS. 3 and 4, the opening adjusting mechanism 5 is supported by a packing box 10 so as to be rotatable in a penetrating state and immovable in the axial direction, and has a male screw portion formed on the outer peripheral surface of the lower end portion. And a round handle 26 attached to the upper end portion of the stopper rod 25 and a male threaded portion of the stopper rod 25, and accommodated in the packing box 10 so as not to be rotatable and vertically movable so that the spring 24 of the check valve 4 is accommodated. And a valve body presser 27 with which the check valve body 22 pushed up by water pressure comes into contact. When the stopper rod 25 is rotated forward and backward by the round handle 26, the valve body presser 27 is prevented from rotating. Moves up and down.
Therefore, the opening adjustment mechanism 5 adjusts the opening / closing position (opening amount) of the check valve 4 by adjusting the vertical position of the valve body presser 27 to change the position of the check valve body 22 in the open position. It is possible to adjust the flow rate.

A plurality of protrusions 27 a that are engaged with a plurality of vertical grooves 10 a formed on the inner peripheral surface of the packing box 10 and prevent the valve body presser 27 from rotating are formed on the outer peripheral surface of the flange portion of the valve body presser 27. Has been.
Further, a cushioning material 28 made of a synthetic resin that absorbs an impact when the check valve body 22 collides is attached to the lower surface of the flange portion of the valve body presser 27.
Further, the stopper rod 25 is formed with a penetrating air vent hole 25a at the center thereof so that the air in the check valve chamber 1d can be discharged to the outside. This air vent hole 25 a is closed by a handle stop screw 29 of the round handle 26.
Therefore, by removing the handle stop screw 29, the air in the check valve chamber 1d can be discharged to the outside. This air vent hole 25a is used for confirming the water stop condition on the secondary side of the check valve 4 or for discharging the air remaining in the water supply pipe etc. to the outside after the construction of the piping work, etc. It is also used to measure the water pressure in the pipe line by attaching a pressure gauge here.

  The second valve body 6 is disposed around the check valve 4 and is provided on the main body 1 so as to be operable and adjustable. When the check valve body 22 of the check valve 4 is replaced, the second valve body 6 is provided. The check valve 4 is surrounded so that the secondary side of the check valve 4 can be stopped.

Specifically, the second valve body 6 is formed in a cylindrical shape, and an annular second valve made of synthetic rubber that sits on and separates from the check valve chamber 1d side to the partition wall 1e. The body packing 30 is fixed by baking. The second valve body packing 30 may be detachably attached to the second valve body 6.
Further, a flange portion 6a facing the notch portion 7a of the second valve body presser 7 is formed on the outer peripheral surface of the upper end portion of the second valve body 6, and an anti-slip is provided on the outer peripheral surface of the flange portion 6a. Knurls are formed.
Furthermore, a male screw portion that is screwed into a female screw portion formed on the inner peripheral surface of the opening of the check valve chamber 1 d of the main body barrel 1 is formed on the outer peripheral surface of the intermediate portion of the second valve body 6.

And this 2nd valve body 6 screw | threads the external thread part in the internal thread part formed in the opening inner peripheral surface of the non-return valve chamber 1d, and is in the opening of the non-return valve chamber 1d of the main body trunk | drum 1. The check valve 4 is screwed onto the peripheral surface so as to be adjustable in the vertical direction, and the check valve 4 is adjusted by moving the second valve body 6 downward and bringing the second valve body packing 30 into contact with the partition wall 1e. It surrounds to have become a secondary side of the check valve 4 to allow water stop.
In addition, the 2nd valve body 6 becomes the shape arrange | positioned around the cylindrical part of the check valve 4 and the packing box 10, and between the 2nd valve body 6 and the cylindrical part of the packing box 10, and The space between the second valve body 6 and the main body body 1 is sealed by an O-ring 8.

The second valve body presser 7 is formed in a cylindrical shape with a small diameter at the upper end, and is screwed to the outer peripheral surface of the opening portion of the check valve chamber 1 d of the main body barrel 1. The second valve body presser 7 is for preventing the second valve body 6 from coming off.
In addition, two cutout portions 7a facing the flange portion 6a of the second valve body 6 are formed on the large diameter portion of the second valve body presser 7 so as to face each other. The body 6 can be rotated.

  Next, the effect | action of the water stop cock with a secondary side water stop function mentioned above is demonstrated.

  When the ball 2 is in the open position, the tap water that has entered from the inlet 1 a reaches the water inlet 1 f through the water passage hole 2 a of the ball 2 and pushes up the check valve body 22 against the elastic force of the spring 24. . As a result, the tap water on the primary side flows into the check valve chamber 1d from the water inlet 1f and is discharged from the outlet 1c to the secondary side.

  When the inflow of tap water stops or tap water tries to flow backward, the check valve body 22 is pushed by the elastic force of the spring 24 and the valve body packing 23 of the check valve body 22 is moved to the valve seat. It sits on the surface 1g and closes the water inlet 1f to prevent backflow of tap water.

  Further, by turning the round bundle 25 to move the valve body presser 27 up and down, adjusting the vertical position of the valve body presser 27 and adjusting the opening degree (opening amount) of the check valve 4, the water flow rate can be freely adjusted. Can be adjusted.

  In addition, if the handle stop screw 29 is removed, the check valve chamber 1d and the outside communicate with each other through the air vent hole 25a, so that air can be easily vented from the check valve chamber 1d and the pipe line.

  When the check valve body 22 of the check valve 4 is replaced using the second valve body 6, first, the lever handle 20 is turned 90 ° to bring the ball 2 into the closed position, and the primary side is moved. Stop water (see FIG. 5).

Next, the flange portion 6a of the second valve body 6 located at the notch 7a of the second valve body presser 7 is turned by hand to move the second valve body 6 downward, and the lower end portion of the second valve body 6 The second valve body packing 30 attached to is attached to the upper surface of the partition wall 1e of the main body barrel 1. Thereby, the secondary side of the check valve 4 is stopped (see FIG. 5).
At this time, the flange part 6a of the second valve body 6 is exposed to the outside from the opposed notch part 7a formed in the second valve body presser 7, and a knurl is formed on the outer peripheral surface of the flange part 6a. Therefore, the secondary side of the check valve 4 can be stopped without using a tool, and the second valve body 6 can be extremely easily rotated. Can be done quickly.

  When the secondary side of the check valve 4 is stopped by the second valve body 6, the handle stop screw 29 is removed to open the air vent hole 25 a formed in the plug rod 25. In this state, the secondary water stoppage of the check valve 4 can be confirmed by checking whether the secondary return water comes out from the air vent hole 25a of the stopper rod 25.

When the secondary water stoppage of the check valve 4 is confirmed, as shown in FIG. 6, the packing box 10 is removed from the second valve body holder 7 to open the check valve chamber 1d, and the check valve chamber 1d is opened. Replace the check valve body 22 with a new one.
At this time, since the secondary side of the check valve 4 is stopped by the second valve body 6, the return water remaining in the water supply pipe on the secondary side of the stop cock overflows from the stop cock. This eliminates the need for a return water removal operation and the like, and can greatly reduce the work time, and eliminates the risk of contaminated water from entering the building due to the return water on the secondary side.

  Thus, if the stop cock with the secondary side water stop function is used, the water stop on the secondary side of the check valve can be easily and easily performed, and the check valve parts can be replaced without any problem. The work time can be shortened, and problems such as inundation accidents in the building can be solved.

  1 is a main body, 1a is an inlet, 1b is a stop cock chamber, 1c is an outlet, 1d is a check valve chamber, 1e is a partition wall, 1f is a water inlet, 2 is a ball, 2a is a water inlet, Check valve, 5 is an opening adjusting mechanism, 6 is a second valve body, 6a is a flange portion of the second valve body, 7 is a second valve body presser, 7a is a notch portion of the second valve body presser, and 10 is a packing Box, 25 is a stopper rod, 25a is an air vent hole, 26 is a round handle, 27 is a valve body retainer, 29 is a round handle retaining screw, and 30 is a second valve body packing.

Claims (3)

The stop cock chamber (1b) communicating with the inlet (1a), the check valve chamber (1d) communicating with the outlet (1c), the stop cock chamber (1b) and the check valve chamber (1d) are partitioned. A body trunk (1) having a water passage (1f) formed in the partition wall (1e) and formed in the partition wall (1e) to communicate the water stop cock chamber (1b) and the check valve chamber (1d); A ball (2) that is accommodated in (1b) so as to be rotatable and has a water passage hole (2a) that allows the inflow port (1a) and the water passage port (1f) to be in a communication state or a non-communication state; A check valve (4) provided in (1d) for opening the water inlet (1f) by a forward flow of tap water and closing the water inlet (1f) by a reverse flow of tap water; It is arranged around the valve (4) and is provided on the main body barrel (1) so as to be operable and adjustable. And a cylindrical second valve body (6) to which a ring-shaped second valve body packing (30) is attached, and the second valve body (6) is adjusted by moving the second valve body (6). When the valve body packing (30) is brought into contact with the partition wall (1e) on the check valve chamber (1d) side, the check valve (4) is surrounded and the secondary side of the check valve (4) is stopped. Further, the second valve body (6) is screwed to the main body barrel (1) so that the lower end of the second valve body (6) faces the check valve chamber (1d), A cylindrical second valve body presser (7) and a second valve, the upper part of the second valve body (6) protruding from the body body (1) has a notch (7a) screwed to the body body (1). The second valve body presser (7) is partially covered by a packing box (10) whose lower part also serves as a lid of the check valve chamber (1d) screwed to the inner peripheral surface of the body presser (7). Rotating from the notch (7a) Secondary side water stop function with stop cock, characterized in that it has become possible work. The 2nd valve body (6) is provided with the flange part (6a) which faces the notch part (7a) of a 2nd valve body holder (7) in the upper end outer peripheral surface, The outer peripheral surface of the said flange part (6a) The water stop cock with a secondary side water stop function according to claim 1, wherein a knurling is formed in the water stop. The packing box (10) is provided with an opening degree adjusting mechanism (5) for adjusting the opening degree of the check valve (4), and the opening degree adjusting mechanism (5) is rotatable in a state of penetrating the packing box (10). A stopper rod (25) supported so as not to move in the axial direction and having a male threaded portion on the outer peripheral surface of the lower end, a round handle (26) attached to the upper end of the stopper rod (25), and a stopper rod (25) And is accommodated in the packing box (10) in a non-rotatable and vertically movable manner to support the check valve (4) and the check valve (4) pushed up by water pressure The valve body presser (27) is in contact with the stopper rod (25), and the stopper rod (25) closes the opening of the air vent hole (25a) for venting the air in the check valve chamber (1d) and the air vent hole (25a). secondary waterproofing function with stop according to claim 1, characterized in that it comprises a screw (29) Plug.

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