JP2007255059A - Meter direct-coupled cut-off valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems in a conventional meter direct-coupled cut-off valve used only for cut-off/flow of water with a check valve separately set on the secondary side to require an extra face-to-face distance in addition to a problem in meter management and requiring much time and labor for parts replacement and repair at the occurrence of a water leakage due to a failure of an O-ring set to a drain hole water passage opening/closing part. <P>SOLUTION: A valve chamber 3 is provided at the upper part of a ball valve 2 for opening/closing a water passage. A guide frame 6 provided with a strainer 61 is fittingly mounted in the valve chamber to store a floating valve element 5 inside, and the upper part is provided with a valve stem 4 up and down operated within the guide frame to regulate the operation range of the floating valve element from the upper part. The secondary side end of a stop valve body is constituted into a direct-coupled joint structure to a city water meter. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is attached to the primary side end of a water meter, and distributes the authority of water supply / distribution to pipes, backflow prevention, foreign matter filtration, flow rate adjustment, water stoppage and water flow step by step. This is related to a water stop cock directly connected to a meter that can also manage the meter.

  Conventionally, when installing a water meter, a method has been adopted in which a stop cock is attached to the primary end and a check valve is attached to the secondary end across the meter. Since there is a limit to the length of the storage container to be buried, it has been necessary to shorten the distance between the surfaces as much as possible.

Therefore, for the check valve, for example, a cartridge type is used as described in Patent Document 1, and for the water stop valve, the upper handle plug as described in Patent Document 2 is simply rotated. Those that can stop and pass water are used, and those that have a very complicated mechanism cannot be used. On the other hand, as for an independent single stop cock, a stop cock integrally provided with a check valve as described in Patent Document 3, and a check valve and a strainer are integrally provided as described in Patent Document 4. There is also a stop cock.
JP 2002-327863 A Japanese Patent Laid-Open No. 2002-131997 JP 07-280114 A Japanese Patent Laid-Open No. 06-129552

  However, the water meter is installed in the distribution branch that divides water from the main, and there is a difference in the water supply pressure depending on the distance from the main, and by adjusting the flow rate at the meter installation part Although it is desired to adjust the water supply pressure, there is a problem that the above-mentioned single stop cock has not been dealt with.

  In addition, since the check valve corresponding to the reverse flow from the secondary side of the water meter is made of a floating valve body, it is difficult to reliably seat on the water stop valve seat due to the shape of the spherical valve body. In many cases, the smooth operation of the floating valve body is hindered in combination with the biting of the valve, and in particular, in the present invention, when the strainer function coexists, the check valve member must be replaced quickly because of the need to remove the filtrate. Is required.

  Conventionally, a water stop cock directly attached to a meter has a relationship of being attached to a primary side, and as described in Patent Document 2, the upper handle stopper is rotated to easily stop and pass water. I was able to do water. However, the management of water meters is performed in stages by water utilities such as local governments and waterworks construction contractors, etc., and if water stoppage or water flow is done without permission, it does not make sense for meter management. Absent.

  The present invention is intended to address the above-described problems. A valve chamber is provided in the upper part of a ball valve that opens and closes a water passage, and a guide frame provided with a strainer is set in the valve chamber. In addition, a plug rod that moves up and down in the valve chamber to regulate the operating range of the floating valve body is provided so that the flow rate can be adjusted by operating the plug rod.

  That is, the basic structure of the backflow prevention water stop cock is to provide a valve chamber above the ball valve, which is the main structure of the water stop opening / closing mechanism, and to set a floating valve body that prevents backflow in the valve chamber. The body is housed in a guide frame provided with a strainer, and the operating range of the floating valve body is regulated by the guide frame, and a stopper rod that moves up and down by the turning operation is set on the upper part of the floating valve body. The top portion was pressed by the tip of the plug rod to forcibly restrict the buoyancy of the floating valve body due to the feed water pressure, thereby adjusting the flow rate.

  In addition, the floating valve body is configured by forming the lower end of the cylindrical portion along the inner diameter of the guide frame in a conical shape, and the fitting protrusion provided on the outer wall portion of the guide frame and the fitting recess provided on the valve chamber wall portion are provided. A check valve unit having a fitting structure in which the guide frame and the valve chamber can be attached and detached is configured to accommodate quick replacement and repair of members.

  In addition, the strainer is constructed by stretching a screen on the valve seat frame made of a flexible material, and is detachably fitted to the tip of the guide frame, so that only the valve seat frame can be replaced by separating from the guide frame. The strainer, which is easily worn by sand and dust, can be easily replaced.

  Next, by attaching a cushioning material for buffering the contact with the tail end of the floating valve body to the tip of the plug rod, the tip of the plug rod set for flow rate regulation in the present invention is placed on the top of the floating valve body. The squeaking noise generated by the surface contact is eliminated, the adhesion of the surface contact is promoted, and the flow adjustment operation by the plug bar can be performed smoothly.

Next, one side of the valve chamber that houses the ball valve for opening and closing the water passage is joined to the turning operation portion of the ball valve, and the other end is fitted into the fitting recess of the handle key inserted from the insertion port. A handle key insertion hole for fitting a rotation shaft configured on a fitting convex portion that enables rotation of the ball valve by the handle key is provided, and a guide key groove set for the handle key is provided on the inner wall thereof. A guide pin that is fitted to restrict the turning operation of the handle key is provided in a protruding manner, and the handle key is provided with only a guide key groove that can be turned in the water stopping direction, and is rotated in both the water stopping direction and the water passing direction. By providing a handle key with a guide key groove that can be operated dynamically, meter management can be performed in stages.

Embodiments of the present invention will be described below with reference to the drawings. 1 is a stop cock main body, and the water supply from the junction 11 with the water distribution branch branched from the main pipe passes through the water passage 21 of the ball valve 2 and is a check valve fitted in the check valve chamber 3. It consists of a main body portion 1a and a plug rod support body 1b that form a water passage 12 that reaches the joint structure 13 with the primary side end of the water meter through the unit. In the drawing, the joint structure portion 13 with the water meter is a joint structure with the cap nut 15, but it goes without saying that a press joint structure with the holder body may be used.

  The stopper rod support barrel 1b is detachably screwed onto the upper portion of the main barrel portion 1a, and the female screw 14 engraved on the inner wall and the male screw 41 of the stopper rod 4 are screwed together to support the stopper rod 4. At the same time, the stopper rod 4 is screwed back and forth with respect to the valve chamber 3. A shock absorbing material 43 made of a flexible material such as a synthetic resin is attached to the tip 42 of the stopper rod 4, and even if the stopper rod 4 descends and contacts the tail end 51 of the floating valve body 5 and rotates, No itching sound is generated.

  A switching valve chamber 22 is formed at the lower end portion of the main body 1a, and the ball valve 2 including a water passage 21 for switching stop water is rotatably accommodated and provided at a side portion of the valve chamber 22. By inserting the handle key A from the insertion port 23 and rotating the ball valve 2 via the fitting rotation shaft 24 with the ball valve 2, the water passage state and the water stop state can be switched.

  There are two types of handle key A, a handle key Aa that can be held only by a specific person and can pass and stop water, and a handle key Ab that can only stop water. A handle key that allows only water to pass through can also be prepared.) The handle key can be managed so that a water user or the like operates the valve to prevent fraud such as stealing.

  That is, as shown in FIGS. 5 and 6, the handle key Aa is fitted with a guide pin 25 set in the insertion port 23, and there are two guide key grooves 26a and 26b for restricting the insertion position and the rotation direction. When the guide key groove 26a is fitted to the pin 25, the ball valve 2 can be rotated only in the water stop direction.

When the guide key groove of 26b is fitted to the pin 25, the ball valve 2 can be rotated only in the direction of water flow. Therefore, water users and construction personnel have a handle key Ab in which only the guide keyway 26a is set, and when the water leaks or starts construction, the water is stopped at the primary side to stop the progress of the meter. When the water leakage is eliminated or the construction is completed, an administrator is requested to open the valve 2 with the handle key Aa and allow water to pass.
The insertion port 23 is normally covered with a cap 27 that is screwed with the male screw 23a.

  An upper portion of the switching valve chamber 22 is a check valve chamber 3, in which a guide valve 6 that houses a floating valve body 5 and is provided with a strainer 61 is fitted. In this way, the operating range of the floating valve body 5 is restricted, and a plug bar 4 that moves up and down in the valve chamber 3 by a turning operation is set at the upper part thereof.

  The stopper rod 4 moves up and down by screwing back and forth with the female screw 14 of the stopper rod support barrel 1b, and finally the check valve seat in which the tip 5b of the floating valve body 5 is fitted to the lower end of the guide frame 6 is inserted. The water flow between the switching valve chamber 22 and the check valve chamber 3 is stopped.

  The floating valve body 5 includes a cylindrical portion 5a along the inner diameter of the guide frame 6 and a conical lower end portion 5b. The cylindrical portion 5a is in sliding contact with the frame wall of the guide frame 6 and has a conical lower end portion 5b. Is in contact with the valve seat 62 made of a flexible material, so that the operation of the floating valve body 5 is smoothly performed by accurate guide regulation.

  When the stopper rod 4 is lowered by the turning operation, the tip 42 comes into contact with the tail end 51 of the floating valve body 5 via the cushioning material 43 and pushes down the valve body 5 against the buoyancy caused by the water pressure from the lower valve chamber 22. Therefore, the water flow path 63 formed in the side wall portion of the guide frame 6 is sequentially closed, and the flow rate of water passing through the meter is reduced.

  When the flow rate decreases and an appropriate amount of water cannot be obtained, raising the plug rod 4 pushes up the valve body 5 and sequentially opens the water passage 63, increasing the flow rate of water passing through the meter. The position of the valve body 5 in the guide frame 6 is adjusted by rotating the rod 4 to adjust the flow rate corresponding to the water supply pressure.

  The guide frame 6 is made of a material such as a synthetic resin, and the upper frame 6a and the lower frame 6b are connected by an appropriate support column 64 and configured in a cylindrical shape. A water passage 63 is formed between the support column and the support column. A fitting projection 65 that fits into a fitting recess provided in the guide frame fitting inlet of the valve chamber 3 is provided at an appropriate location outside the support column. The lower end of the lower frame 6b has a fitting structure with the upper surface of the check valve seat 62 made of a flexible material such as rubber, and the check valve seat 62 is detachably fitted.

  As described above, the check valve seat 62 has a fitting structure in which the upper surface thereof is fitted with the guide frame lower frame 6 b and the lower surface is fitted with a filtration screen made of a wire mesh or the like constituting the strainer 61. Yes. Note that the strainer set in the guide frame is not limited to the above-described configuration, and may be set by stretching a filtration screen in the water passage portion of the guide frame side wall.

Since the present invention is configured as described above, it has conventionally been necessary to provide a management stop cock, a check valve, a strainer, a flow rate adjusting mechanism and the like separately from the stop cock directly provided on the meter. On the other hand, all can be dealt with only by the stop cock according to the present invention, and parts replacement and repair can be dealt with simply and quickly.

BRIEF DESCRIPTION OF THE DRAWINGS It is the whole structure front view which shows the Example of the meter direct connection stop cock by this invention, and made the whole the longitudinal cross section. Similarly, it is a right side view of FIG. 1 in which the left half is a longitudinal section showing the internal structure and the right half is an external view. Similarly, it is a whole structure front view which shows the state which lowered | hung the stopper rod in FIG. Similarly, it is the elements on larger scale which show the state of the guide frame inserted in the check valve chamber. Similarly, it is a front view of the handle key for turning off the stop water switching valve of the meter direct stop water tap according to the present invention. Similarly, it is a bottom view of a switching valve turning handle key that can perform both stop water. Similarly, it is a bottom view of a switching valve turning handle key that performs only water stop. Similarly, it is a right view of the handle key of FIG. Similarly, it is a right side view of the handle key of FIG. Similarly, it is the whole figure which made the principal part the section showing the state where the direct stop cock according to the present invention was directly connected to the water meter by the 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 distribution branch of a water stopcock main body 12 Water flow path to the junction structure part with a water meter 13 Joint structure with water meter 14 Plug rod threaded female screw of plug rod support barrel 15 Cap nut 2 Switching ball valve 21 Ball valve water passage 22 Switching valve chamber 23 Handle key insertion port 23a Cap for covering the insertion port Threaded male screw 24 Rotating shaft for fitting the ball valve and handle key 25 Cap 26a for covering the insertion port Guide key groove 26b for restricting the rotational direction only in the water-stopping direction Rotating direction only in the water-passing direction Guide key groove to be regulated 27 Guide pin 3 Check valve chamber 4 Plug rod 41 Male screw of the plug rod 42 Tip of the plug rod 43 Buffer material at the tip of the plug rod 5 Floating valve body 5a Cylindrical portion of the floating valve body 5b Floating valve body Conical lower end of 51 Tail end of floating valve body 6 Floating valve body guide frame 6a Upper frame of guide frame 6b Lower frame of guide frame 61 Strainer 62 Check valve seat 63 Water flow path of guide frame 64 Connection support column of guide frame 65 Fit of guide frame Joint key A Handle key Aa Handle key that can pass water and stop water Ab Handle key that can only stop water M Water meter

Claims (5)

  A valve chamber is provided in the upper part of the ball valve that opens and closes the water passage by a turning operation, a guide frame provided with a strainer is fitted in the valve chamber to accommodate the floating valve body, and the guide frame is provided in the upper part thereof. A stopper rod that regulates the operating range of the floating valve body from above is provided by moving up and down in the guide frame, and the secondary side end of the stop cock body is configured to have a direct connection structure with a water meter. A meter direct stop cock   The floating valve body is configured by forming the lower end of the cylindrical part along the inner diameter of the guide frame into a conical shape, and the fitting protrusion provided on the outer wall part of the guide frame and the fitting recess provided on the valve chamber wall part are fitted. The meter directly connected water faucet according to claim 1, wherein the fitting structure is configured such that the guide frame and the valve chamber are detachable.   The meter direct-coupled faucet according to claim 1 or 2, wherein the strainer is configured by stretching a screen on a valve seat frame made of a flexible material, and detachably fitted to the tip of the guide frame.   The meter direct stop water faucet according to claim 1, 2 or 3, wherein a shock absorbing material for buffering contact with the tail end of the floating valve body is attached to the tip of the stopper rod.   One side of the valve chamber that houses the ball valve for opening and closing the water passage is joined to the turning operation part of the ball valve, and the other end is fitted into the fitting recess of the handle key inserted from the insertion port. Provided with a handle key insertion hole for fitting the rotation shaft configured on the fitting convex part that enables rotation of the ball valve by the key, and fitted on the inner wall of the guide key groove set for the handle key A guide pin that restricts the turning operation of the handle key is projected, and the handle key provided only with a guide key groove that can be turned in the water stopping direction, and the turning operation in both the water stopping direction and the water passing direction. The meter direct stop water faucet according to claim 1, 2, 3, or 4, wherein meter management can be performed step by step by providing a handle key having a guide key groove that can be formed.

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