JP2007278335A - Strainer water stopper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems on a conventional water stopper which mainly functions for water stop and has independent equipment separately set for filtering foreign matters, preventing a backflow and controlling a flow amount, that foreign matters often flow into a water distribution pipe in relation to a change in the installation environment of the water stopper, resulting in the need for incorporating a strainer mechanism into a piping system and for shortening a face-to-face distance of a stopper body. <P>SOLUTION: At the side on the secondary side of a ball valve 2, a water flow chamber 23 is provided to which a unit body 3 is fitted with a valve seat formed on the upper face and a filtering screen set on the side periphery. A valve chamber is provided at the upper part thereof, in which a valve rod water stop valve having a floating valve element attached to the front end so as to be seated on the valve seat of the unit body for elevating operation and a check valve 5 in a secondary side water flow port are set. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention sets a strainer mechanism that can be easily replaced and cleaned to a water stopcock having a ball valve mechanism that is turned as a sub-plug, and at the same time, a strainer that can also prevent backflow and adjust the flow rate. It relates to a stop cock.

  Conventionally, the stop cocks set at the required locations of the water distribution pipes from the water supply main are mainly for the water stop function, and separate equipment such as check valves are used for filtering foreign substances, preventing backflow, and adjusting the flow rate. Although it has been set, there is an urgent need to reduce the length space (so-called inter-surface distance) of the device arrangement as much as possible in relation to changes in the installation environment of water meters.

  Furthermore, with the development of apartment houses and other apartment buildings, the form of diversion pipes has also changed, and foreign objects often flow into the distribution pipes, making it necessary to incorporate a strainer mechanism to prevent and eliminate this in the piping system. I came.

Therefore, a stop cock that is integrally provided with a check valve and a strainer as described in Patent Document 1 and a stop cock that is integrally provided with a check valve as described in Patent Document 2 have been developed. As described in Japanese Patent Application Laid-Open No. 2004-228688, the distance between surfaces has been reduced by utilizing an elbow joint or using a cartridge type check valve.
Japanese Patent Laid-Open No. 06-129552 JP 07-280114 A Japanese Patent Laid-Open No. 2002-131997

  However, since the strainer is installed in a flow path such as a stop cock, its replacement and cleaning require extremely troublesome work such as disassembling the main body of the equipment, and also because of the installation space. There is a problem that it cannot be applied in a place where the installation space is narrow due to an increase in the distance and an increase in the height and an increase in the volume of the device body.

  In addition, the installation of a water meter that requires the installation of a minimum stop cock is installed in a distribution branch that divides water from the main, and a check valve for preventing backflow is indispensable. However, there is a difference in the water supply pressure depending on the distance from the main pipe, and it is desirable to adjust the water supply pressure by adjusting the flow rate at the meter installation part. With the increase in volume and the increase in piping space, there is a problem that cannot be fully met.

  The present invention is intended to provide a strainer stop cock having a function of preventing the backflow and adjusting the flow rate in addition to the original water stop function and the foreign matter filtering function. On the secondary side, a water flow chamber is provided with a unit body fitted with a valve seat on the upper surface and a filtration screen set on the side periphery. A floating valve body seated on the valve seat of the unit body is provided at the top. And a valve chamber in which a check valve is set at the secondary side water inlet.

  In other words, a water passage chamber for fitting a strainer is provided on the side of the ball valve that functions as a sub-plug, and a valve chamber for a stopper rod water stop valve that is a main plug is provided on the upper side, and the valve seat and strainer are unit bodies. In this configuration, the valve seat setting space is taken into the strainer setting space, and further, the strainer setting space is reduced by fitting the unit body into the water chamber. The ball valve setting space and the stopper rod water stop valve setting space arranged in series between the water inlet and the secondary water inlet are arranged side by side to greatly reduce the distance between the two water inlets.

  In addition, the rotation support shaft of the ball valve is set at a position that is decentered by a predetermined angle with respect to the central axis of the drain water passage hole formed in the ball, and the water passage has an oblique angle with respect to the drain water passage chamber. By configuring so that the drainage water passing chamber is disposed obliquely below the ball valve, it is possible to set the height of the plug bar to a corresponding extent.

  Further, the secondary end of the stop cock is configured as an expansion tube that is fitted to the primary end of the water meter, and a check valve is set in the expansion tube. It can be used as a stop cock, and it can be used as a stop cock attached to a water meter, eliminating the need to set a check valve on the secondary end of the meter. It can be used as a multi-function stop cock for installation with a meter.

Further, as described in Patent Document 2, there is already a stop cock with a check valve. However, when a check valve operation check means is provided, or when the check valve setting unit is dissociated from the main body. There is no device provided with means for introducing air beforehand. According to the present invention, a vent hole provided with a cover mechanism is provided between the water stop portion and the check valve portion, so that the check valve operation check stopper or the stop cock main body is disassembled in the device. It can be used as a vent plug to avoid sudden air inflow.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is a water stopcock main body, and the water supply from the junction 11 with the water distribution branch pipe which is diverted from the main pipe passes through the discharge water passage hole 21 of the ball valve 2 and is a plug rod fitted in the water passage chamber 23. It comprises a main body 1a and a plug rod support body 1b that form a water passage 12 through a unit body 3 comprising a valve seat and a strainer of the water stop valve 4 to a joint structure 13 with a secondary side pipe. ing.

  The plug bar support barrel 1b is detachably screwed onto the upper portion of the main barrel 1a, and the female screw 14 engraved on the inner wall and the male screw 41 of the plug bar 4 are screwed together to support the plug bar 4. At the same time, the stopper rod 4 is screwed back and forth with respect to the valve chamber 42. An insertion hole 43b into which the support shaft 43a of the floating valve body 43 is inserted is formed at the tip of the plug rod 4, and the floating valve body 43 is attached to the plug rod 4 in a free state where the floating valve body 43 is lowered by its own weight by the insertion of the support shaft 43a. When the valve chamber 42 does not pass water, the valve element 43 is seated on the valve seat 44 by its own weight.

  A switching valve chamber 22 is formed at the lower end of the main body 1a, and the ball valve 2 having a water passage hole 21 for switching stop water is rotatably accommodated and provided on a side portion of the valve chamber 22. By inserting a handle key from the insertion port 24 and rotating the ball valve 2 via the fitting rotation shaft 25 with the ball valve 2, the water flow state and the water stop state can be switched.

  The switching valve chamber side water passage chamber 23 is fitted with a unit body 3 having an upper surface configured as a valve seat 44 and a filtration screen 31 set on the side periphery thereof, and the upper portion thereof serves as a stopper rod water stop valve chamber 42. When the water supply from the water distribution pipe flows into the valve chamber 42 through the unit body 3, the floating valve body 43 is pushed up and the water flow passes through the water passage 12.

  In this case, when the stopper rod 4 is screwed down by the handle 45, the valve element insertion hole 43b is also relatively lowered, and the operating range of the floating valve element 43 that operates only within the length range of the insertion hole is restricted, and the supply water pressure The flow rate can be adjusted according to the height of the valve. Finally, the floating valve body 43 is attached to the valve seat 44 and the passage between the switching valve chamber 22 and the stopper rod water stop valve chamber 42 is made. Stop water.

  A check valve 5 is set in the water channel from the water stop valve chamber 42 to the water passage 12, and the back flow from the secondary side distribution pipe side is prevented here. A vent hole 51 provided with a cover mechanism 52 is drilled, and when checking the check valve 5 to check whether the check valve 5 is operating normally, or when disassembling the stop cock main body, there is a sudden change in the device. It can be used as a vent plug to avoid air inflow.

  Moreover, if the joining structure of the water flow path 12 is configured to be an expansion and contraction pipe mechanism that joins the water meter primary side end, a multi-function that does not require separate installation of a check valve, a flow rate adjusting mechanism, and a strainer mechanism is provided. It can be used as a stop cock attached to a water meter.

  The strainer unit body 3 is formed by connecting an upper frame 3a made of a flexible material such as rubber and a lower frame 3b made of a material such as synthetic resin with an appropriate support column, and is configured in a cylindrical shape. A water passage is formed by setting a filtration screen 31 made of a metal mesh or the like, and the upper frame 3a is configured to have a valve seat 44 whose upper surface inner peripheral portion is fitted to the bottom portion of the floating valve body 43, and the outer peripheral portion is formed with the valve chamber 23 and the valve. It has a fitting structure for a fitting frame set in a partition wall with the chamber 42.

  A screw hole of a screw 32 screwed into a female screw hole 26 provided at the bottom of the water flow chamber 23 is formed at the bottom of the lower frame 3b made of a material such as a synthetic resin, and the fixing strength that can withstand water pressure by screw fixing. Can be obtained. With these fitting structures, the unit body 3 is detachably fitted into the water flow chamber 23 to facilitate replacement of the valve seat 44 of the floating valve body 43 that is easily worn and cleaning of the strainer portion.

  To replace and clean the unit body, the ball valve 2 is closed to stop the water flow from the primary side, and the plug bar 4 is removed together with the plug bar support barrel 1b. The ball valve 2 is opened by attaching the plug rod 4 and the plug rod support cylinder 1b after performing a predetermined operation.

  In order to confirm and check the backflow prevention performance of the check valve 5, the stopper rod water stop valve 43 (the floating valve is pushed down to the valve seat 44 by the handle 45 and closed) and / or the ball valve 2 or both are closed. Water from the next side is stopped, and the check plug 51 is opened. If the check valve 5 operates normally, no water leaks from the check plug. However, if the check valve is abnormal, water leaks from the secondary side due to water pressure from the secondary side. Therefore, the operation of the check valve can be confirmed immediately.

  Since the present invention is configured as described above, the distance between the faces of the stop cock can be greatly reduced, and conventionally, a check valve, a strainer, a flow rate adjusting mechanism, etc. are provided in the piping separately from the stop cock. In contrast to the necessity to provide them, all of the stopcocks according to the present invention can be used, and parts replacement and repair can be easily and quickly handled.

An embodiment of a strainer stop cock according to the present invention is shown, and the ball valve is set at a position where the rotation support shaft is decentered by a predetermined angle so that the water is discharged obliquely to the discharge water passage. It is the whole structure front view which made the whole state of having constituted in a longitudinal section. Similarly, it is the left view of FIG. 1 shown as an external view. Similarly, it is the whole structure top view which made the whole the cross section. Similarly, it is the whole structure top view which showed FIG. 3 as an external view. Similarly, it is the decomposition | disassembly longitudinal cross-section side view which decomposed | disassembled the whole structure and showed as a longitudinal cross-section.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water stopcock main body 1a Main body part of a water stopcock main body 1b Plug bar support cylinder of a water stopcock main body 11 Joint port with the water distribution branch of a water stopcock main body 12 Water flow path to a secondary side junction structure part 13 Secondary Joint structure with side pipe 14 Plug rod threaded female screw of plug rod support barrel 2 Switching ball valve 21 Water passage hole of ball valve 22 Switching valve chamber 23 Unit body fitting water passage chamber 24 Handle key insertion port 25 Ball valve Rotating shaft for fitting with handle key 26 Unit body fixing female screw hole 3 Strainer unit body 3a Upper frame of strainer unit body 3b Lower frame of strainer unit body 31 Filtration screen of strainer unit body 32 Fixing screw for strainer unit body 4 Plug rod 41 Plug screw male screw 42 Plug rod water stop valve chamber 43 Floating valve body 43a Floating valve body support shaft 43b Insertion hole of floating valve body support shaft at the end of the plug bar 44 Plug rod water stop valve seat 5 covering caps operation check stopper operation check plug 52 a check valve of the handle 5 the check valve 51 check valve Senbotome water valve

Claims (5)

  On the secondary side of the ball valve that opens and closes the water passage by turning operation, a water passage chamber is provided with a unit body with a top face configured as a valve seat and a filtration screen set on the side circumference. A floating valve body seated on the valve seat of the unit body is operably fitted to the tip, and a stopper rod water stop valve that moves up and down, and a valve chamber in which a check valve is set at the secondary side water inlet are provided. Strainer stopcock   The pivot support shaft of the ball valve is set at a position that is eccentric by a predetermined angle with respect to the central axis of the drain water passage hole drilled in the ball, and the water is drained at an oblique angle with respect to the drain water passage chamber. The strainer stop cock according to claim 1 configured to be configured as described above.   The secondary side end of the water stop cock has an expansion tube configuration that is fitted to the primary side end of a water meter, and a check valve is set in the expansion tube. Strainer stopcock   The ball valve valve chamber and the stopper rod water stop valve chamber are set side by side and in parallel with respect to the central axis of the water flow pipe so as to shorten the distance between the longitudinal surfaces of the water flow pipe. Or a strainer stop cock according to claim 3 5. A strainer stop cock according to claim 1, wherein a vent hole provided with a cover mechanism is provided between the water stop portion and the check valve portion.

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