JP4537627B2 - Water stop tap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a water draining stop cock that prevents a freezing accident by discharging accumulated water in a secondary side pipe at the same time as stopping water.
[0002]
[Prior art]
In cold regions, the outside air temperature in winter falls below freezing point, and the accumulated water in the piping may freeze at night when water is not used, and the piping may rupture. A water drain plug for discharging the accumulated water to the outside is connected to the secondary side pipe.
[0003]
On the other hand, when the main plug and the water drain are separate, it is necessary to operate the water drain after closing the main plug, but these two operations are cumbersome and it is easy to make mistakes in the operation procedure. Water faucets for draining that are integrated with a faucet and a water faucet and that can simultaneously stop and drain water with a single operation are widely used.
[0004]
FIG. 4 shows an example of a conventional water drain stop cock. Normally, water is passed from the primary side X on the left side of the drawing to the secondary side Y on the right side of the drawing in the state shown in FIG. However, when the cock 20 is twisted 90 degrees to the state shown in FIG. 5B, the water flow is cut off by the built-in ball valve 21 and the water is stopped. That is, the ball valve 21 is provided with an inverted L-shaped water passage 22 bent at 90 degrees in a longitudinal sectional view, and the ball valve 21 is rotated to switch between water flow and water stop. ing.
[0005]
On the other hand, regarding draining, a drain hole 24 is formed in the valve box 23, and a through hole 25 communicating with the drain hole 24 in the water stop position is formed in the ball valve 21 through the water passage 22. Has been. Therefore, according to this prior art, water can be drained at the same time as water stoppage by only one operation of twisting the cock 20.
[0006]
FIG. 5 shows another prior art, which is a drain stop cock utilizing a ball valve 30. The feature of this prior art is that the drainage sheet 31 can be replaced. is there. More specifically, first, the ball valve 30 is provided with an L-shaped water passage 32 bent through 90 degrees in a cross-sectional view. In the state shown in FIG. As shown in FIG. 5B, the water is opened to both the primary side X and the secondary side Y via the check valve 33, and water can be passed.
[0007]
On the other hand, with respect to drainage, a first drainage channel 35 communicating with the secondary side Y is formed in the valve box 34, and the valve shaft 36 is also communicated with the first drainage channel 35 at the water stop position. When the second drainage channel 37 is formed and the cock 38 is twisted 90 degrees to the state shown in FIG. 5C, the water flow on the primary side X is cut off and the second drainage channel 37 and the first drainage channel 35 communicate with each other, and the accumulated water on the secondary side Y is discharged from the outlet of the second drainage channel 37 so as to leak from the gap of the cock 38. Therefore, in this prior art, it is possible to stop and drain water by one operation of twisting the cock 38. Further, in this prior art, the water draining sheet 31 is interposed at the connecting portion of the first drainage path 35 and the second drainage path 37, and the drain 39 is removed by removing the plug 39 attached to and detached from the side surface of the valve box 34. Since the maintenance sheet 31 can be maintained, the water draining sheet 31 that deteriorates with time can be replaced, and the product life can be improved.
[0008]
[Problems to be solved by the invention]
The prior art described above has the following problems. First, both of the prior arts have a problem that the pressure loss during water passage is large because the water passage formed in the ball valve is bent and the flow path is complicated and narrow.
[0009]
Secondly, the former has a problem that since the water draining sheet is built in the sealed valve box, the sheet cannot be replaced, and the product life is shortened due to deterioration of the sheet over time.
[0010]
Thirdly, in the latter, the formation of the first and second drainage channels is complicated, and of course, it is necessary to provide a dedicated production line. In addition, there is a problem that the size of the valve box is increased because the drainage sheet is incorporated in a replaceable manner.
[0011]
The present invention has been made in order to solve the above-described problems, and the object of the present invention is to provide a water drain stop that has a small flow pressure loss during water flow, is easy to manufacture, is small in size, and has a long product life. To provide a faucet.
[0012]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention has a tubular valve box having joints connected to the primary side and the secondary side at both ends, and provided with a lever or cock on the side surface, and the lever and cock and the circuit. It consists of a ball valve having a water passage that is connected via a dynamic shaft and is capable of switching between water flow and water stop. The ball valve communicates with the water flow passage and is eccentric to the side surface from the rotation center point. The first drainage channel is formed, the second drainage channel is formed on the bottom surface, and the first axis centering on the rotation axis on the side surface opposite to the lever or cock of the valve box. A means is provided that is located on the rotation trajectory of the drainage channel, and provides a discharge channel that can drain the accumulated water on the secondary side in line with the first drainage channel when water stops.
[0013]
Further, the water passage of the ball valve is linearly connected so that the primary side and the secondary side communicate in a straight line, and the drainage sheet is replaceably attached to the discharge path of the valve box, and the drainage sheet Was used, and a plug was detachably provided in the discharge path.
[0014]
According to a second aspect of the present invention, the ball valve uses a means for flatly chamfering the contact portion with the drainage sheet.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a drain stop for each of the drainage stop cock according to an embodiment of the present invention (FIG. (A)) and water stop / drain (B). The side view longitudinal cross-sectional view of a stopper is shown. In the figure, the drain stop cock is on the left side of the primary side X from which water is supplied from the main water supply pipe, etc., and on the right side is the secondary side Y that feeds water into the house. Cylindrical valve box provided with joints 1a and 1b on the secondary side Y, 2 is a ball valve built in the valve box 1, 3 is located on the side surface of the valve box 1, via a rotating shaft 3a An operating lever connected to the ball valve 2. Reference numeral 4 denotes a synthetic resin ball sheet.
As is apparent from the figure, the water draining stop cock has a substantially straight tubular shape, and the valve box 1 does not have a large bulge and is very compact.
[0016]
Further, the ball valve 2 is formed with a water passage 5 in a straight line, and further with two water drain passages 6 and 7 communicating with the water passage 5. One of them is a first drainage passage 6 formed on the side surface of the ball valve 2 so as to be slightly eccentric from the center C of the rotation shaft 3a and communicating with a drainage mechanism 8 described later when the water stops. One is a second drainage passage 7 formed at the center of the bottom surface of the ball valve 2 and communicating with the secondary side Y when water stops.
[0017]
In the above configuration, first, the water flow and water stop structure of the water drain stop cock will be described. The ball valve 2 is provided with a water passage 5 that connects the primary side X and the secondary side Y in a straight line. As shown in FIG. 1A, in the state where the operation lever 3 is tilted to the right side, the water passage 5 is in a water passage state by communicating the primary side X and the secondary side Y. On the other hand, as shown in FIG. 1 (B), when the operation lever 3 is tilted to the left, the ball valve 2 rotates 90 degrees in conjunction with this, and the water passage 5 that has been horizontal until then is displaced vertically. For this reason, the primary side X is closed by the wall surface of the ball valve 2, and the water is stopped.
[0018]
Next, the water draining structure of the embodiment will be described with reference to FIG. (A) is a water-flowing state in which the operation lever 3 is tilted to the back, and (B) in FIG. A longitudinal sectional view is shown. As is clear from the figure, a drainage mechanism 8 is provided on the side surface of the valve box 1 opposite to the operation lever 3.
[0019]
A drainage mechanism 8 provided on one side surface (right side in the figure) of the valve box 1 includes a discharge path 9 formed in the valve box 1 and a water drain incorporated in the discharge path 9 so as to come into contact with the ball valve 2. A valve box 1 is connected to a seat 12 and a plug 12 screwed into the discharge passage 9 and having a T-shaped passage 11 communicating with the discharge passage 9 formed in the screw shaft, and the other end of the T-shaped passage 11. And a cap 14 that is screwed into the drain port 13 so that the opening degree of the drain port 13 can be adjusted. The drain port 13 formed in the valve box 1 is formed continuously with the female screw hole 13 a of the cap 14. In addition, since the male screw 14a of the cap 14 cannot be drained if it is a complete spiral screw, the screw shaft is processed so as to have a substantially square cross section, and a part of the screw thread is lost. The drain is drained from the lack. In order to adjust the tightening amount of the cap 14, a spacer (not shown) may be bitten.
[0020]
The operation of the drainage mechanism 8 having the above configuration will be described. First, in the water flow state shown in FIG. 2 (A), the first water drain passage 6 formed on the side surface of the ball valve 2 is not communicated with the discharge passage 9 of the water drain mechanism 8 and is in a closed state. Therefore, no water is drained from the drainage mechanism 8. That is, in the ball valve 2 in a water flow state, the first drainage path 6 is provided eccentrically slightly above the ball valve 2, while the discharge path 9 of the drainage mechanism 8 is provided on the ball valve 2. This is because the first drainage path 6 and the discharge path 9 do not coincide with each other in a water-flowing state. More specifically, as is clear from FIG. 1 (A), the discharge passage 9 of the drainage mechanism 8 is a first drainage centering around the rotation axis 3a of the ball valve 2 on the side surface of the valve box 1. In the case of this embodiment, the first drainage path 6 and the discharge path 9 of the drainage port 13 are formed with a phase difference of 90 degrees. Yes. In addition, in the water flow state, the other second drainage path 7 formed on the bottom surface of the ball valve 2 does not communicate with the secondary side Y and is closed by the ball seat 4.
[0021]
On the other hand, in the water stop state shown in FIG. 2B, the ball valve 2 rotates by water stop operation of the operation lever 3, that is, by tilting the operation lever 3 forward 90 degrees from the state of FIG. The water passage 5 is vertically oriented and closed by the ball seat 4 to stop the water, and at the same time, the first drainage passage 6 formed on the side surface of the ball valve 2 is formed on the side surface of the valve box 1. The first drainage path 6 and the discharge path 9 are in communication with each other. At the same time, the second drainage passage 7 formed on the bottom surface of the ball valve 2 communicates with the secondary side Y. Therefore, in this state, the primary side X is closed, while the secondary side Y is connected to the discharge path 9 of the drainage mechanism 8 via the second drainage path 7, the water passage 5, and the first drainage path 6. The accumulated water on the secondary side Y is discharged from the drain port 13 through the discharge passage 9 and the T-shaped passage 11 of the plug 12.
[0022]
Thus, according to the water stop cock for draining of this embodiment, water operation / water stop can be switched only by operating the operating lever 3, and water can be drained simultaneously with water stop. Further, since the water passage 5 of the ball valve 2 is formed in a straight tube shape, the primary side X and the secondary side Y are connected linearly during water passage, so that almost no fluid pressure loss occurs.
[0023]
In addition, since the drainage sheet 10 that deteriorates with time can be easily maintained and replaced from the outside by removing the plug 12, it is not necessary to replace the entire product due to the deterioration of the drainage sheet 10, and it is consumed. Since only the part can be exchanged, it is reasonable and economical.
[0024]
Furthermore, since the configuration itself is substantially the same as the conventional ball stop cock, parts can be diverted, the increase in production cost can be suppressed, and manufacturing and assembly can be performed very easily.
[0025]
In addition, in embodiment illustrated here, it comprised so that the drainage sheet | seat 10 could be replaced | exchanged suitably by removing the plug 12 which can be attached or detached to the discharge path 9 of the valve box 1. FIG. For this reason, as described above, the advantage of improving the product life can be obtained, but on the other hand, the flow path from the discharge path 9 to the water drain port 13 is somewhat complicated. Therefore, as a simpler configuration, the plug 12 and the drain port 13 are omitted, and the cap 14 is directly attached to the discharge passage 9 of the valve box 1. Even with this simple configuration, by adjusting the tightening amount of the cap 14, the discharge path 9 can function as the water drain port 13, and water can be drained simultaneously with water stoppage. Further, since the water passage 5 of the ball valve 2 does not need to be changed, it is possible to provide a water drain stop cock with a small pressure loss.
[0026]
In addition, in the present embodiment, the rod-shaped operation lever 3 is adopted as the operation means of the ball valve 2, but it goes without saying that a knob-shaped cock may be employed instead.
[0027]
Furthermore, in this embodiment, as shown in FIG. 2 and FIG. 3, the contact portion of the ball valve 2 with the water draining sheet 10 is chamfered flat 2a, so that even if the ball valve 2 rotates, There is an advantage that good adhesion to the water draining sheet 10 is maintained, and the water draining sheet 10 does not need a complicated shape. However, forming the chamfer 2a on the ball valve 2 is an example, and the chamfer 2a can be omitted.
[0028]
【The invention's effect】
As described above, according to the present invention, the drainage path provided eccentrically on the side surface of the ball valve matches the drainage discharge path provided in the valve box at the time of water stoppage, so that the secondary side accumulated water is drained. Since it comprised so that water stop and draining can be performed by one operation. Therefore, the operability is improved and the operation is not mistaken as compared with the conventional case where the main plug and the water drain plug are separate.
[0029]
Further, by making most of the structure the same as that of a conventional ball-type water stop cock, it is possible to make a water stop cock for draining rationally and economically, such as being able to divert parts.
[0030]
In addition, since the water passage for the ball valve is provided linearly and the primary side and the secondary side are made to flow in a straight line, inconveniences such as pressure loss and flow velocity reduction during water passage can be avoided.
[0031]
Furthermore, since the drainage sheet can be replaced by removing the detachable plug from the drainage discharge passage of the valve box, the product life can be improved.
[Brief description of the drawings]
FIG. 1 (A) is a side cross-sectional view showing a water passing state of a drain plug according to an embodiment of the present invention, and FIG. Side view vertical cross-sectional view showing the water / drainage state [FIG. 2] FIG. 2 (A) is a front view vertical cross-sectional view showing the water passage state of the drain plug, and FIG. Fig. 3 is a front sectional view showing the water stop and drain state of the water stop cock. Fig. 3A is an enlarged perspective view of the main part showing the water flow state of the water stop cock. (B) is an enlarged perspective view of the main part showing the water stop / drain state of the drain plug. FIG. 4 (A) is a side view showing the water flow state of the conventional drain plug. Fig. 5 (B) is a side sectional view showing the water stop / drain state (B) of the drain plug. [Fig. 5] (A) is another conventional drain stop. Side view longitudinal sectional view showing the water flow state of the faucet, the same figure (B) is a water stop cock for draining the same Cross-sectional view showing a water passage state, FIG. (C) a side view cross-sectional view which shows waterproofing-drainage state of the stop cock for the water drain may EXPLANATION OF REFERENCE NUMERALS
DESCRIPTION OF SYMBOLS 1 Valve box 2 Ball valve 3 Operation lever 4 Ball seat 5 Water flow path 6 First drainage path 7 Second drainage path 8 Drainage mechanism 9 Drain discharge path 10 Drainage sheet 11 T-shaped path in plug 12 Plug 13 Drain outlet 14 Cap

Claims (2)

It consists of a valve box and a ball valve that is housed in the valve box and has a water passage that can be switched between water flow and water stop, and the water passage of the ball valve is a straight line that connects the primary side and the secondary side in a straight line. The ball valve communicates with the water passage, and forms a first water drain passage opening on the side surface of the ball valve from the rotation center point, and the bottom surface communicates with the water passage. In addition, the valve box is located on the rotation trajectory of the first drainage path centered on the rotation axis, and the second drainage path is used when water stops. The secondary side and the water passage of the ball valve communicate with each other, and a discharge passage is formed that matches the first drainage passage and communicates the secondary side stagnant water to the outside so that the water can be drained. A drainage sheet is replaceably attached to the discharge path, and the drainage sheet is sealed and a plug is connected to the discharge path. Draining for stop cock, characterized in that detachably provided. The drain valve according to claim 1 , wherein the ball valve is formed by chamfering a contact portion with a drain sheet.

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