JP2504209Y2 - Water meter connection device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water meter connecting device for connecting a water meter to a water pipe.

[0002]

2. Description of the Related Art In general, a water meter connected to the middle of a water pipe needs to be replaced with a new water meter after the expiration of a predetermined certification expiration date. A connecting device is attached for easy attachment and detachment.

Conventionally, as this type of connecting device, for example, a water meter attaching / detaching device in Japanese Patent Laid-Open No. 4-209219 is known. A connection device (attachment / detachment device) disclosed in the publication has a base portion having a pair of connection plates facing each other, which has a connection port for connecting a water pipe side to an outer surface and a water meter unit portion on an inner surface. The water meter and the check valve section for blocking the backflow are provided, and the water meter unit section having the connection ends connectable to the connection port is provided at both ends.

When the water meter (water meter unit) is replaced, the water stopcock provided on the upstream side of the connecting device is closed to stop the water supply to the water meter, and then the attachment / detachment jig is used. Replace the water meter.

[0005]

However, the above-mentioned conventional connecting device has the following problems to be solved.

First, when the water meter is replaced, it is necessary to close the water stopcock to stop the water supply to the water meter, and then the replacement work must be carried out, which requires time and effort. .

Secondly, normally, a water stopcock (valves) for water supply or water stop operation is connected to the downstream side of the water meter,
When the conventional connecting device is used, a water stopcock that stops water at the time of replacing the water meter is indispensable on the upstream side of the water meter, which may complicate the construction equipment and increase costs. There is.

The present invention solves the problems existing in the prior art as described above, and realizes the replacement by the touch-up operation, which can significantly reduce the labor and time at the time of replacement and complicate the construction equipment. An object of the present invention is to provide a water meter connection device that can prevent an increase in cost.

[0009]

In the present invention, in constructing a water meter connecting device 1 for connecting a water meter M in the middle of a water pipe P, in particular, a pair of connecting block parts facing each other in the front and rear direction. An external connection part 3 that includes a base part 2 having 3 and 4 and that connects the downstream (faucet side) and upstream (water source side) water pipes Pd and Pu to the outer surface sides of the connection block parts 3 and 4, respectively.
o and 4o are provided, and the connection block part 3 on the downstream side is provided.
To the inner surface side of the inner connection part 3 with which one end Mx of the water meter M is in pressure contact
i is provided on the other hand, on the other hand, on the inner surface side of the upstream side connection block portion 4, the upstream first spring 6, the downstream second spring 7 and the respective springs 6 and 7 which are configured to expand and contract The valve unit 5 composed of the supported valve body 8 is urged in the extending direction, has an inner connecting portion 4i capable of press-contacting the other end My of the water meter M at the time of extending, and is attached to the valve body 8 at the time of shortening. It is characterized in that a cylinder portion 10 having a valve seat portion 9 which is brought into pressure contact to stop water is provided.

In this case, the urging force Eu of the first spring 6
And the urging force Ed of the second spring 7 are selected under the condition of Eu> Ed, and the opening diameter Di of the inner connection portion 4i capable of being pressed against the inner diameter Dc of the cylinder portion 10 and the other end My of the water meter M.
Is preferably selected under the condition of Dc> Di. In addition, the base portion 2 includes a pair of left and right connecting stay portions 11 and 12 that connect the connection block portions 3 and 4, and a water meter mounting portion 13 that is installed between the stay portions 11 and 12. Furthermore, if the outer diameter of the tip of the cylinder portion 10 is different,
By making it possible, a step that allows the attachment / detachment jig S to be gripped from the outside
To form a part .

[0011]

According to the water meter connecting device 1 of the present invention, the water meter M is mounted between the pair of connecting block portions 3 and 4 facing each other in the front-rear direction. That is, one end Mx of the water meter M is in pressure contact with the inner connection portion 3i of the downstream connection block portion 3, and the other end My is connected to the inner connection portion 4i of the cylinder portion 10 provided in the upstream connection block portion 4. Pressure contact. At this time, the cylinder part 1
0 is biased in the extending direction by a valve unit 5 including a built-in first spring 6, a second spring 7 and a valve body 8 supported between the springs 6 and 7. When the cylinder portion 10 is in the extended state, the valve body 8 is separated from the valve seat portion 9, the cylinder portion 10 is in the water supply state, and the inner diameter Dc of the cylinder portion 10 and the other end My of the water meter M are provided. Since the opening diameter Di of the inner connection portion 4i capable of press contact is selected in the condition of Dc> Di, one end Mx and the other end My of the water meter M are respectively connected to the inner connection portion 3i and the inner connection portion 4i by the principle of Pascal. Press against it with sufficient pressing force.

On the other hand, the connection block parts 3 and 4 are connected by a pair of left and right connecting stay parts 11 and 12 to form an integrated base part 2. As a result, the water meter M
The left and right positions are regulated by the connecting stay portions 11 and 12, and the bottom surface is supported by the water meter mounting portion 13 installed between the stay portions 11 and 12. The downstream and upstream water pipes Pd and Pu are connected to the outer connection portions 3o and 4o of the connection block portions 3 and 4, respectively. Therefore, the upstream water pipe Pu and the downstream water pipe Pd
Are communicatively connected via the cylinder unit 10 and the water meter M.

On the other hand, when replacing the water meter M, if the cylinder section 10 is shortened by using the attachment / detachment jig S, the inner connecting portion 4i is separated from the other end My of the water meter M. At this time, since the urging force Eu of the first spring 6 and the urging force Ed of the second spring 7 are selected to satisfy the condition of Eu> Ed, the valve seat portion 9 is displaced and the valve body 9 is displaced at the same time when the cylinder portion 10 is shortened. Press against 8 to stop water. Therefore, the water meter M can be replaced in this state. And if you set a new water meter M,
When the cylinder portion 10 is extended again, the inner connecting portion 4i comes into pressure contact with the other end My of the water meter M.

Due to such an action, the connection device 1 according to the present invention is provided with the connection device 1 at a position where the operator can reach, because the hole for accommodating the connection device 1 is shallow, such as in an area with little snowfall. It is most suitable for, and even one worker can easily perform the replacement work with one touch.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

First, the configuration of the connection device 1 according to this embodiment will be described with reference to FIGS.

The connecting device 1 includes a base portion 2, and the base portion 2 has a pair of connecting block portions 3 and 4 facing each other in the front-rear direction. Each of the connection block portions 3 and 4 is formed in a plate shape, and a pair of left and right leg portions 3c ... 4c ...
Have.

A tubular connecting member 21 is fixed by a nut 22 in a hole provided in the upper portion of the connecting block portion 3. Then, a screw hole 23 is formed in the connection member 21 on the outer surface side of the connection block portion 3, and the water pipe Pd on the downstream side is formed.
Is provided with an outer connecting portion 3o, and the inner connecting portion 3i is provided by forming a concave portion 24 on the inner surface side of the connecting block portion 3 with which one end Mx of the water meter M is pressed.

Furthermore, one end of the cylinder portion 10 is fixed by a nut 25 in a hole provided in the upper portion of the connection block portion 4. Then, a screw hole 26 is formed in an end portion of the cylinder portion 10 on the outer surface side of the connection block portion 4 to provide an outer connection portion 4o to which the water pipe Pu on the upstream side is connected. The cylinder portion 10 is configured to be expandable and contractable by a combination of an outer cylinder member 10o fixed to the connection block portion 4 and an inner cylinder member 10i slidably inserted inside the outer cylinder member 10o. Note that 27 is a sealing member, and 28 is a stopper member that regulates the maximum extension position of the inner cylinder member 10i. On the other hand, the inner cylinder member 1
The connecting member 29 is attached to the end portion inside 0i.
At the tip of the connecting member 29, a concave portion 30 against which the other end My of the water meter M is pressed is formed to provide an inner connecting portion 4i and an opening 31. The opening diameter Di of the opening 31 is equal to the cylinder portion 10 ( D with respect to the inner diameter Dc of the inner cylinder member 10i)
Select so that the condition of c> Di is satisfied. The inside of the cylinder of the opening 31 serves as the valve seat portion 9.

On the other hand, the valve unit 5 is built in the cylinder portion 10. The valve unit 5 includes a first spring 6 on the upstream side, a second spring 7 on the downstream side, and a valve body 8 supported between the springs 6 and 7,
Is compressed to urge the cylinder portion 10 in the extension direction. In this case, the urging force Eu of the first spring 6 and the urging force Ed of the second spring 7 are selected under the condition of Eu> Ed. Further, as shown in FIGS. 1 and 4, the valve body 8 is formed to have a large diameter so that a locking portion 33 for locking the springs 6 and 7 and a protruding portion formed at one end of the locking portion 33. The valve body 34 having a small diameter is integrally formed, and the valve body 34 has an opening 3 formed at the center of the upstream end surface.
5i and the internal passage 35 which connects the four openings 35o ... which were formed in the peripheral surface.

On the other hand, the connection block portions 3 and 4 are connected by a pair of left and right connecting stay portions 11 and 12, and a U-shaped water meter mounting portion 13 is installed between the stay portions 11 and 12. If the outer diameter of the tip of the cylinder 10 is different,
By making it possible, a step that allows the attachment / detachment jig S to be gripped from the outside
To form a part .

Next, a method of using the connection device 1 according to this embodiment will be described with reference to FIGS.

In FIG. 6, reference numeral 51 is a meter box buried in the ground G, and the connecting device 1 according to the present invention is installed inside the meter box 51. At this time, each of the connection block parts 3 and 4 has a pair of left and right leg parts 3c ...
Since it has c ..., it can be placed stably by a total of four legs. The downstream water pipe Pd is connected to the outer connection portion 3o of the one connection block portion 3, and the upstream water pipe Pu is connected to the outer connection portion 4o of the other connection block portion 4.

Further, the water meter M includes the connection block parts 3 and 4 respectively.
Install in between. That is, one end Mx of the water meter M is connected to the inner connecting portion 3 of the connecting block portion 3 on the downstream side via the rubber packing 41.
The cylinder portion 1 which is pressed against i and has the other end My provided on the upstream side connection block portion 4 via the rubber packing 42.
It is pressed against the inner connecting portion 4i on the 0 side. At this time, the cylinder portion 10 is urged in the extending direction by the valve unit 5 including the built-in first spring 6, the second spring 7, and the valve body 8 supported between the springs 6 and 7. When the cylinder portion 10 is in the extended state, the valve body 8 is separated from the valve seat portion 9, and the cylinder portion 10 is in the water supply state,
The inner diameter Dc of the cylinder portion 10 and the opening diameter Di of the inner connecting portion 4i that can be pressed against the other end My of the water meter M are selected under the condition of Dc> Di. And the other end My are pressed against the inner connecting portion 3i and the inner connecting portion 4i with sufficient pressing force. Also, the water meter M
The lateral position of each of the connecting stay portions 11 and 12 is restricted, and the bottom surface is supported by the water meter mounting portion 13 installed between the stay portions 11 and 12. Therefore, the water pipe Pu on the upstream side and the water pipe Pd on the downstream side are connected to the cylinder portion 1.
It is connected through 0 and the water meter M. The flow of water is in the direction of arrow W in FIG.

On the other hand, the water meter M can be replaced by using the attachment / detachment jig S. The attachment / detachment jig S can be opened and closed in the direction of arrow F, and can hold the cylinder portion 10 when closed. Therefore, if the cylinder part 10 is shortened using the attachment / detachment jig S, the inner connection part 4i is separated from the other end My of the water meter M, and the urging force Eu of the first spring 6 and the second spring 7 are separated. Since the urging force Ed is selected in the condition of Eu> Ed, the valve seat 9 is displaced at the same time as the cylinder 10 is shortened, and the valve seat 8 is pressed against the valve body 8 to stop water. Therefore, the water meter M can be replaced in this state. Then, when a new water meter M is set, the cylinder portion 10 may be extended again. As a result, the inner connecting portion 4i comes into pressure contact with the other end My of the water meter M.

As a result, when the meter box 51 for accommodating the connecting device 1 has a shallow depth and the connecting device 1 is provided within a reach of the operator, as in an area where the amount of snowfall is small, the operator alone. Even if there is one, the replacement work can be done easily with one touch, and there is no need to close the stopcock.
Further, it is not necessary to provide a water stopcock for stopping water at the time of replacing the water meter also on the upstream side of the water meter, and it is possible to prevent complication of construction equipment and increase in cost. Furthermore, since the connecting device 1 according to the present invention includes the valve body 8 supported by the pair of springs 6 and 7 inside the cylinder portion 10, the valve body 8 does not protrude from the cylinder portion 10 and the overall size is reduced. In particular, the advantage that the volume of the meter box 51 can be reduced can be enjoyed.

The embodiment has been described in detail above.
The present invention is not limited to such an embodiment,
The detailed configuration, shape, etc. can be arbitrarily changed without departing from the gist of the present invention.

[0028]

As described above, the water meter connecting device according to the present invention includes the base portion having the pair of connecting block portions facing each other in the front and rear direction, and the downstream side and the upstream side of the outer surface side of each connecting block portion. In addition to providing an outer connecting portion for connecting each of the water pipes, an inner connecting portion to which one end of the water meter is pressed is provided on the inner surface side of the downstream connecting block portion, while the other inner surface side of the upstream connecting block portion is provided. In addition, the valve unit, which is configured to be expandable and contractible and has a built-in upstream side first spring, a downstream side second spring, and a valve element supported between the springs, is urged in the extending direction and A cylinder part having an internal connection part that can be pressed into contact with the other end of the water meter, and a valve seat part that presses against the valve element to stop water when shortened is provided. Play.

Since it is not necessary to close the water stopcock when the water meter is replaced, the water meter can be replaced by a touch operation, and the time and effort at the time of replacement can be greatly reduced.

Since the water stopcock provided on the upstream side of the water meter is unnecessary, it is possible to prevent the construction equipment from becoming complicated and the cost from increasing.

Since the valve body supported by the pair of springs is provided inside the cylinder portion, the valve body does not project from the cylinder portion, and the connection device as a whole can be downsized and the meter box can be downsized. .

[Brief description of drawings]

1 is a sectional side view of the connecting device according to the present invention taken along the line AA in FIG. 2;

FIG. 2 is a plan view of the connecting device,

FIG. 3 is a sectional view taken along line BB in FIG.

FIG. 4 is a cross-sectional view of the valve body of the connecting device taken along the line CC in FIG. 1,

FIG. 5: A- in FIG. 2 when a water meter is replaced in the same connection device
A line cross-sectional side view,

FIG. 6 is an explanatory diagram of use of the connecting device,

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connection device 2 Base part 3 Connection block part 4 Connection block part 5 Valve unit 6 1st spring 7 2nd spring 8 Valve body 9 Valve seat part 10 Cylinder part 11 Connection stay part 12 Connection stay part 13 Water meter placement part P Water pipe Pu Upstream water pipe Pd Downstream water pipe M Water meter Mx One end of water meter My Other end of water meter S Attachment jig

Claims (6)

(57) [Scope of utility model registration request] 1. A water meter connecting device for connecting a water meter in the middle of a water pipe, comprising a base part having a pair of connecting block parts facing each other in front and back, and on the outer surface side of each connecting block part. While providing an external connection portion that connects the downstream and upstream water pipes respectively, on the inner surface side of the downstream connection block portion, an internal connection portion at which one end of the water meter is pressure contacted,
On the other hand, on the inner surface side of the upstream side connection block portion, by a valve unit composed of an expandable and built-in upstream first spring, a downstream second spring, and a valve element supported between the springs. A cylinder part is provided that is biased in the extension direction, has an inner connection part that can be pressed against the other end of the water meter when it is expanded, and has a valve seat part that presses against the valve body to stop water when it is shortened. A connecting device for a water meter, which is characterized in that 2. The water meter connecting device according to claim 1, wherein the urging force Eu of the first spring and the urging force Ed of the second spring are selected in a condition of Eu> Ed. 3. The water meter according to claim 1, wherein the inner diameter Dc of the cylinder section and the opening diameter Di of the inner connecting section which can be pressed against the other end of the water meter are selected under the condition of Dc> Di. Connection device. 4. The water meter connecting device according to claim 1, wherein the base portion includes a pair of left and right connecting stay portions that connect the respective connecting block portions. 5. The water meter connecting device according to claim 4, wherein the base part includes a water meter mounting part provided between the stay parts. 6. The outer diameter of the tip of the cylinder portion is different.
This makes it possible to form a step that allows the attachment / detachment jig to be gripped from the outside.
Water meter of the connection device according to claim 1, characterized in that formed.