JP3033944B2 - cock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a case where a container for treating a liquid is connected to a liquid pipe through which the liquid flows at a predetermined pressure, such as a water purifier installed at a faucet of a water supply pipe. And a cock for simultaneously controlling the inflow and outflow of liquid into and from said container.

[0002]

2. Description of the Related Art For example, the inflow and outflow of water to and from a water purifier connected to a faucet of a tap are controlled simultaneously by a faucet-side cock. With such a configuration, when a cock is provided in a water supply unit connected to the outlet side of the water purifier, and the inflow and outflow to the water purifier are controlled by the cock, an excessively large water is supplied to the water purifier having a larger cross-sectional volume than the piping. If pressure is applied and the structure of the water purifier is not made robust, the water purifier may be damaged or rapidly deteriorated.

[0003]

However, a container for purifying the liquid flowing through the liquid pipe, such as a water purifier, is installed, and the inflow and outflow to and from the container are performed in parallel by a cock installed upstream of the container. When the control is performed in such a manner, there are the following problems. That is, by stopping the inflow and outflow to the container, when the pressure of the liquid flowing through the pipe downstream of the container is lost, the germs in the downstream pipe move into the container and easily propagate. That is. In order to solve such a problem and prevent excessive pressure from being applied to the container when the outflow from the container is stopped, cocks are respectively installed on the upstream side and the downstream side of the container in the piping. When stopping the flow of liquid, close the upstream cock and then close the downstream cock.When starting the liquid flow, open the downstream cock and then open the upstream cock. It should just be operated.

However, as described above, it is troublesome to separately operate the cock provided on the downstream side of the vessel in the pipe and the cock provided on the upstream side, and there is a possibility that the order of the operations may be erroneous. Therefore, the structure of the container must be sufficiently strong for safety. An object of the present invention is to separately control the inflow to and out of the container installed in the liquid pipe as described above so that excessive pressure of the internal fluid is not applied to the container. It is another object of the present invention to provide a cock that can control both of them with good timing using one cock. Another object of the present invention is to provide two containers in a liquid pipe in order along the flow direction, and to use an upstream container and a downstream container in parallel, and to use only an upstream container. The purpose of the present invention is to provide a cock that can be selectively switched with one cock.

[0005]

A cock according to the present invention is configured as follows to solve the above-mentioned problem. That is, in the cock of the first aspect, the plug 2 is inserted into the main body 1 in a state where the plug 2 rotates in a liquid-tight manner and within a predetermined angle range, and the first flow hole 21 formed in the plug 2 allows First inlet 1 formed in main body 1
1st cock part 1 with which 1 and 1st outlet 12 are opened
a , a second cock portion 1b through which a second inlet 13 and a second outlet 14 formed in the main body 1 are opened by a second flow hole 22 formed in the plug 2; The first cock portion 1a and the second cock portion 1b are opened and closed in parallel by operation of the plug 2, and are configured as the following first or second. It is characterized by. First, the second inflow port 13 or the second outflow port 14 in the second cock portion 1b and the second flow hole 22 are connected to the first inflow port in the first cock portion 1a. 11 and the first outlet 12 start opening slightly earlier than the opening, and the first inlet 11 and the first outlet 12 close and close slightly later than the first outlet 12 starts to close. In a starting state, they are formed slightly shifted from each other. The second is the first cock portion 1a
The first inlet 11 or the first outlet 12 and the first flow hole 21 are open to the second inlet 13 and the second outlet 14 of the second cock 1b. The second opening 13 and the second outlet 14 start opening slightly later than starting, and slightly close to each other so as to start closing slightly earlier than starting to close. is there.

In the cock according to the second aspect, the plug 4 is inserted into the main body 3 in a liquid-tight and rotating manner within a predetermined angle range, and the first cock portion 3a and the second cock portion 3b are connected to each other. When the plug 4 is rotated in one direction by a predetermined angle, a first inlet 31 and a first outlet 32 respectively formed in the main body 3 are connected to the first cock portion 3a. When the plug 4 is opened by the first flow hole 41 formed in the plug 4 and the plug 4 is rotated by a predetermined angle in the other direction,
The first inflow port 31 and the first outflow port 32 are configured to be opened by a second flow hole 42 formed in the plug 4, and the second cock portion 3b is When the body 4 is rotated by a predetermined angle in one direction, the body 3
A second inflow port 33 and a second outflow port 34 are respectively formed in the plug 4, and a third flow hole 43 formed in the plug 4 and a fourth flow hole 44 communicating with the flow hole 43.
And a third inflow port 35 and a third outflow port 36 formed in the main body 3 respectively.
When the plug 4 is opened by a fifth flow hole 45 formed in the plug 4 and the plug 4 is rotated by a predetermined angle in the other direction, the second inlet 33 and the third outlet 36 are connected to the second outlet 33. The first cock portion 3a and the second cock portion 3b are configured so as to be opened by the fourth communication hole 44, and the first cock portion 3a and the second cock portion 3b are configured as follows. . The first is the second cock part 3b
, The third inflow port 35 or the third outflow port 36 and the fifth flow hole 45, and the second inflow port 33 or the third
The first outlet 31 and the first outlet 32 of the first cock 3a are connected to the outlet 36 and the fourth flow hole 44 of the first cock 3a.
Start opening slightly earlier than the first opening, and start closing slightly later than the first inlet 31 and the first outlet 32 start closing. It is to form. The second is a first inlet 31 or a first inlet 31 in the first cock portion 3a.
The outlet 32 and the first flow hole 41 start opening slightly later than the opening of the third inlet 35 and the third outlet 36 in the second cock portion 3b,
The third inflow port 35 and the third outflow port 36 are formed so as to be slightly shifted from each other so as to start closing slightly earlier than the closing operation, and the first inflow port 3a of the first cock portion 3a is formed. The inflow port 31 or the first outflow port 32 and the second flow hole 42 are slightly smaller than the second inflow port 33 and the third outflow port 36 in the second cock portion 3b start opening. To the second inlet 33
And the third outlet 36 begin to close slightly earlier than they begin to close.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a cock according to the present invention will be described with reference to the drawings. Cross-sectional view of a state in the first embodiment (present invention to the corresponding claim 1) FIG. 1 is connected to the container equippedwith a cock of the first embodiment faucet portion of water (water purifier), 2 the first of the cock One Kot
FIG. 4 is a schematic cross-sectional view illustrating a relationship between a hook portion and a second cock portion .

[0008] 1 is a main body in which the insertion portion 10 is formed,
The insertion portion 10 of the main body 1 has a handle 20 at one end.
Is inserted so as to rotate in a liquid-tight manner and within a predetermined angle range. The plug 2 is appropriately braked so that it does not rotate freely by appropriately screwing a nut 24 through a spring washer (not shown) to the male screw portion 23 at the end protruding from the main body 1.

The main body 1 and the plug 2 have a first cock 1a for controlling the flow into a container 5 (water purifier) connected to a faucet of a water supply pipe (not shown), and control the flow out of the container 5. A second cock portion 1b is formed.

Each of the first cock portions 1a has an insertion portion 1
A first inflow port 11 and a first outflow port 12 are formed in a part of the main body 1 so as to reach the outer circumference from 0, and a first flow hole 21 formed in the plug 2 is provided. . First
When the plug 2 is turned 90 degrees counterclockwise from the closed position of the cock 1a, the inflow port 11 and the first outflow port 12 are opened by the flow hole 21 and the plug 2 is turned clockwise by 90 degrees. It is configured to be closed when turned.

The second cock portion 1b has a second inlet 13 and a second outlet 14 formed in another portion of the main body 1, and a second flow hole 22 formed in the plug 2. And The second inflow port 13 and the second outflow port 14
The first inflow port 11 and the first outflow port 12 are connected to the flow hole 2.
When opened by one, the second
The opening of the flow hole 22, is configured to substantially be closed simultaneously when the outlet port 12 and the first inlet 11 is closed. O-rings 25, 26 and 27 are provided at required portions of the contact portion between the main body 1 and the plug 2 in order to seal the water passing portions of the first cock portion 1a and the second cock portion 1b.
Is interposed.

The first inlet 11 is connected to a tap of a water supply pipe (not shown) by a pipe (not shown), and the first outlet 12 is connected to an inlet 50 of the container 5 via a packing 15. The second inlet 13 is a packing 16
The outflow portion 51 of the container 5 through the second outlet 14 is in communication respectively communicated with a water supply pipe (not shown).

FIG. 1 shows that a first inlet 11 and a second outlet 12 and a second inlet 13 and a second outlet 14 are respectively opened, and tap water flows through the first cock 1a. This shows a state where the water flows into the container 5 via the second cock part 1b after being purified and flows into the water supply pipe. In this state, as shown in FIG.
2, the first flow hole 21 and the second inflow / outflow ports 13 and 14
Are vertically coincident with each other in the vertical direction in the same figure, whereas the flow hole 22 of the second cock portion 1b is inclined at a slight angle θ along the rotation direction of the plug 2 when the cock is opened. It is formed so as to be shifted. As a result, the second inlet 13 and the outlet 14 connect the plug 2 to the cock portions 1a, 1b.
When turned in the closing direction, the first inlet 11 and the outlet 12
When the plug 2 is rotated in the opening direction of the cocks 1a and 1b, the plug 2 is opened slightly earlier than the inlet 11 and the outlet 12.

As described above, according to the cock of this embodiment, when the cock is operated in the opening direction, the outflow side of the container 5 is opened slightly earlier than its inflow side, and when the cock is operated in the opposite direction. Since the outlet side of the container is closed slightly later than the inlet side, no excessive water pressure is applied to the container 5. Therefore, since the container 5 does not need to be manufactured in a strong structure, it can be manufactured at a lower cost. In addition, since the above-described operation can be performed by one cock, there is no mistake in the order of operation of inflow into the container 5 and outflow from the container 5.

Modification of the Cock of the First Embodiment In the first embodiment, the inflow / outlet port 1 on the first cock portion 1a side is used.
The entrances and exits 13 and 14 of the second cock portion 1b begin to be opened slightly earlier than the openings of the first and second cocks 1b start, and the latter starts closing slightly later than the former starts closing.
Although the flow hole 22 on the second cock portion 1b side is slightly shifted, the same effect can be obtained by, for example, the following configuration instead of the above configuration. The first is that the inlet 13 and / or the outlet 14 on the side of the second cock portion 1b are slightly shifted so that the cock operates as described above. Second, the flow hole 21 on the first cock portion 1a side is slightly shifted so that the cock operates as described above. The third
Means that the inflow port 11 and / or the outflow port 12 on the first cock portion 1a side are slightly shifted so that the cock operates as described above.

Second Embodiment (corresponding to the cock of claim 2) FIGS. 3 to 6 show a cock according to a second embodiment of the present invention. 3 is a partially cutaway front view showing a state in which the cock is connected to a container (water purifier) installed in the liquid pipe along the flow direction, FIG. 4 is an enlarged sectional view of the cock, and FIG. 5 is an arrow A- in FIG. 6A and 6B are cross-sectional views for explaining the operation of the cock. FIG. 6A is a cross-sectional view along arrow BB in FIG. 5, and FIG. 6B is a cross-sectional view along arrow CC in FIG. 5 (c) is a cross-sectional view along the arrow DD in FIG. 5, and FIG.
The figure is a cross-sectional view of a state in which the plug is rotated counterclockwise from the state of FIG.

Reference numeral 3 denotes a main body composed of an outer cylindrical body 3c and a sleeve 3d inserted and fixed into the outer cylindrical body 3c. In the sleeve 3d of the main body 3, a plug 4 having a handle 40 at one end is provided. It is inserted so as to rotate in a liquid-tight manner and within a predetermined angle range. The plug 4 is appropriately braked so as not to rotate freely by properly screwing a nut 46a through a spring washer 46b to a male screw portion 46 at an end protruding from the main body 1.

The main body 3 and the plug 4 have a first cock portion 3a for controlling the flow into a first container 6 (water purifier) connected to a tap of a water supply pipe (not shown), and a first container 6 A second cock portion 3b for controlling the outflow from the container 6 to the water supply side, controlling the outflow from the container 6 to the water supply side and the second container 7 side, and controlling the outflow from the container 7 is formed. Have been.

As shown in FIGS. 4 to 6, the first cock portion 3a has a first inlet 31 formed in a part of the main body 3 so as to reach from the inner peripheral portion to the outer peripheral portion. 1 outlet 32 and first flow hole 4 formed in plug 4
The first and second communication holes 42 are provided. First inlet 3
1 and the first outlet 32 are selectively opened by the first through hole 41 and the second through hole 42 by rotating the plug 4 in the forward and backward directions by 90 degrees, and the opening thereof. When the plug 4 is rotated 45 degrees in one direction from the state, the plug 4 is closed.

The second cock portion 3b includes a second inlet 33, a second outlet 34, a third inlet 35, and a third outlet 36 formed in another portion of the main body 3. Third communication holes 43 formed in the plug 4 and the communication holes 4
A fourth communication hole 44 communicating with the third communication hole 3 and a fifth communication hole 45
And In the second cock portion 3b, the inflow / outflow ports 31 and 32 of the first cock portion 3a are
1, the second inlet 33 is connected to the third outlet 43 and the fourth outlet 44 by the second outlet 3.
Opened with 4. In parallel with this opening, the third inlet 35
Is configured to be opened to the third outlet 36 by the fifth flow hole 45. On the other hand, when the inflow / outflow ports 31 and 32 in the first cock portion 3a are opened by the second flow holes 42, the second flow ports 33 are connected to the fourth flow holes 44.
Is switched from the side of the second outlet 34 to the side of the third outlet 36 to be opened. Therefore, the second cock 3b closes in parallel with the closing of the first cock 3a.

Each inlet / outlet 31, 32, 33, 3 of the main body 3
Connection members 90, 62 , 63, 72, 73 and 80 are respectively attached to 4, 35 and 36 via respective packings 37. In order to seal the water passage portion between the first cock portion 3a and the second cock portion 3b , each packing 38 is interposed at a required portion of a contact portion between the outer cylindrical body 3c of the main body 3 and the sleeve 3d. O-rings 47, 48 and 49 are interposed at required portions of the contact portion between the plug 3 and the plug 4 , respectively.

As shown in FIG. 3, the first cock portion 3a has the first
Is connected to an unillustrated water tap via a connector 90 and a communication pipe 9 , and the first outlet 32 is connected to an inlet 60 of the first container 6. In the second cock <br/> click portion 3b, a second inlet 33 and the outlet portion 61 of the first container 6, the second outlet 34 of the second container 7 through the communicating pipe 74 The inflow portion 70 and the third inflow port 35 are connected to the outflow portion 71 of the second container 7 through a communication pipe 75,
The third outlets 36 are respectively connected to the water supply pipe 8.

4 to 6 (a), (b) and (c) are as follows.
The first inflow / outlet 31, 32 is formed by the first flow hole 41,
The second inflow / outflow ports 33 and 34 are connected to the third flow hole 43 and the fourth
The circulation holes 44 of the third inflow outlet 35, 36 5
Are opened by the respective communication holes 45. Therefore, the tap water flows into the first container 6 through the first cock 3a and is first purified, and then flows into the second container 7 through the second cock 3b, and is subjected to the secondary purification. Then, water is supplied again from the water supply pipe 8 through the second cock portion 3b .

In the state shown in FIG. 6A, the cock portions 3a, 3b
Is closed, the plug 4 is turned 45 degrees counterclockwise. When the plug 4 is turned 90 degrees counterclockwise from the state shown in the figure, the first inflow / outflow ports 31 and 32 of the first cock portion 3a pass through the second flow holes 42,
(D) As shown in the drawing, the second inlet 33 and the fourth outlet 36 of the second cock 3b communicate with each other through the fourth flow hole 44. This cock operation, the portion of the second cock portion 3b is switched flow of water, primary purified water in the first container 6 does not flow to the second vessel 7, first from the first container 6 The water flows into the water supply pipe 8 via the second inlet 33, the fourth flow hole 44, and the third outlet 36. (D) When closing the cock portions 3a and 3b in the state shown in the figure, the plug 4 is turned clockwise by 45 degrees. In this embodiment,
As described above, the handle 4
An indication panel (not shown) fixed to the main body 3 and other supporting members is installed on or around the back of
By turning 0 to position one part of the handle 40 in any direction, both containers 6 and 7 can be used,
The indication panel indicates whether only one of the containers 6 can be used and whether or not the use thereof can be stopped.

Next, the operation and effect of the cock of this embodiment will be described. In a state where water is flowing to the water supply pipe 3 via the first container 6 and the second container 7, as shown in FIGS. 6A and 6B, the first Inflow / outflow ports 31 and 32, first flow hole 41, and second flow port 3
3, the third flow hole 43, the fourth flow hole 44, and the second outlet 34 are in a state where the holes are aligned in the flow direction. On the other hand, the flow hole 4 of the second cock portion 3b
Outlet 5, together are formed by slightly shifting from the outlet 36 is inclined by an angle of .theta.1, fifth through channels 4
5 is formed so as to be slightly shifted downward from the third inlet 35. As a result, when the plug 4 is turned in the counterclockwise direction in FIG. 5A, that is, when the cocks 3a and 3b are closed, the third inflow port 35 and the third outflow port 36 form the first inflow port. When the plug 4 is turned in the opening direction of the cocks 3a and 3b , the plug is opened slightly earlier than the inlet 11 and the outlet 12.

The second inlet 33 and the third outlet 3
6 is formed such that the outlet side to the third outlet 36 has a slight angle in the rotation direction when the inlets 33 and 36 are opened as shown in FIG. It is formed shifted by θ2. As a result, the inflow / outflow ports 33 and 36 of the second cock portion 3b move from the state shown in FIG.
(D) When this is opened in the state shown in the figure, the inflow / outlet ports 31 and 32 in the figure (b) are opened slightly earlier than the opening through the second flow hole 42, and when they are closed, they are slightly more open than the latter. Closed late.

As described above, according to the cock of this embodiment, three pairs of inflow / outflow ports 31 and 32, 33 and 34, and 35 and 36 are formed in the main body 3, and the plug 4 opens and closes them. Are formed so that the second inflow port 33 can be switched between the second outflow port 34 side and the third outflow port 36 side, Further, the opening and closing of the first cock 3a and the opening and closing of the second cock 3b are configured so that the timing is slightly shifted. As a result, when two containers are installed along the flow direction in the liquid pipe and the use of the container on the upstream side and the use of both containers are switched, the inflow and outflow to the container are performed in parallel. When controlled, excessive pressure can be prevented from being applied to the container. Therefore,
Since the container does not need to be manufactured in a rigid structure, it can be manufactured at lower cost. Further, since the above-mentioned operation can be performed by one cock, there is no possibility that the operation order of the inflow to the container and the outflow from the container is confused.

Modification of the Cock of the Second Embodiment In the second embodiment, the outlet of the second cock 3b starts to be opened slightly earlier than the first cock 3a starts to open, and the former closes. The fifth in the second cock part 3b , so that the latter starts closing slightly later than
Although the flow hole 45 and the fourth flow hole 44 are slightly displaced from the outlet 36, the same effect can be obtained by, for example, the following configuration instead of such a configuration. Play. The first is that the third inlet 35 and / or the third outlet 36 are slightly shifted from the fifth flow hole 45 so that the cock operates as described above, and The second inflow port 33 and / or the third outflow port 36 are formed so as to be slightly shifted with respect to the fourth flow hole 44. Its Secondly, the state where the cock acts as described above, one or both of the first inflow outlet 31, with slightly displaced from each other to form with respect to the first flow hole 41, first inflow outlet That is, both or one of 31, 32 is formed to be slightly shifted with respect to the second flow hole 42. Third, in the state where the cock operates as described above, the first circulation hole 41 is inserted into the first inflow / outflow ports 31 and 3.
The second flow holes 42 are formed so as to be slightly shifted with respect to both or one of the first and second inlets 31 and 32.

[0029]

According to the cock according to the first aspect, when the cock is operated in the opening direction, the second cock is opened slightly earlier than the first cock, and the cock is operated in the opposite direction. The second cock is closed slightly later than the first cock, so that the second cock is connected to the vessel used in the liquid pipe and the pipe, and the second cock is closed on the inflow side of the vessel. And the outflow side can be controlled in a timely manner so that excessive water pressure is not applied to the container. Therefore, the container does not need to be manufactured in a strong structure, and can be manufactured at lower cost. In addition, since the inflow and outflow can be controlled in parallel by one cock as described above, there is no mistake in the order of operation of inflow into the container and outflow from the container.

According to the cock according to the second aspect, the first cock portion and the second cock portion are formed in one cock, and the first cock portion has two flow ports for a pair of inflow / outlet ports. A hole is formed, and an opening / closing portion that communicates from the inflow port to the outflow port is provided in the second cock section corresponding to each of the flow holes of the first cock section, and another inflow port is provided from the inflow port to the other outflow port. And an opening / closing section for returning to the outlet again through the outlet, so that the two containers provided in the liquid pipe and the pipe are connected to each other, so that the use of both the upstream and downstream containers and the upstream It can be easily operated so that the use of only the container on the side is appropriately switched. Further, since the opening and closing of the second cock is performed at a slightly different timing from the opening and closing of the first cock, the inflow and outflow to one or two containers provided in the liquid pipe are performed. Can be controlled so that excessive pressure is not applied. Therefore, since each container does not need to be manufactured in a strong structure, it can be manufactured at lower cost. In addition, since the above-mentioned inflow and outflow can be controlled in parallel by one cock, there is no possibility that the operation order of the inflow into the container and the outflow from the container is mistaken.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a cock according to the present invention.

FIG. 2 is a schematic cross-sectional view for explaining the operation of the cock of FIG.

FIG. 3 is a partially broken front view showing another embodiment of the cock according to the present invention.

FIG. 4 is an enlarged sectional view of the cock of FIG. 2;

FIG. 5 is a sectional view taken along arrow AA in FIG. 4;

FIG. 6 is a view for explaining the operation of the cock of FIG. 3;
5A is a schematic cross-sectional view taken along arrow BB in FIG. 5, FIG. 5B is a schematic cross-sectional view taken along arrow CC in FIG. 5, and FIG. 5C is a schematic cross-sectional view taken along arrow DD in FIG. (D) is a schematic cross-sectional view of a state where the plug is turned by a predetermined angle from FIG. (A).

[Explanation of symbols]

 1, 3 Main body 1a, 3a First cock portion 1b, 3b Second cock portion 10 Insertion portion 11 First inlet 12 First outlet 13 Second inlet 14 Second outlet 15, 16 Packing 2,4 Plug 20 Handle 21 First communication hole 22 Second communication hole 23 Male screw part 24 Nut 25,26,27 O-ring 3c Outer cylinder 3d Sleeve 31 First inlet 32 First outlet 33 2nd inflow port 34 2nd outflow port 35 3rd inflow port 36 3rd outflow port 37,38 Packing 40 Handle 41 1st flow hole 42 2nd flow hole 43 3rd flow hole 44th 4 circulation hole 45 5th circulation hole 46 male screw portion 46a nut 46b spring washer 47, 48, 49 O-ring 5 container 50 inflow portion 51 outflow portion 6 first container 60 inflow portion 61 outflow portion 62, 63, 72, 73, 80, 90 Connector 7 Second container 70 Inlet 71 Outlet 74, 75, 9 Communication pipe 8 Water supply pipe

Claims (2)

(57) [Claims] 1. A plug 2 is inserted into a main body 1 in a liquid-tight and rotatable manner within a predetermined angle range, and is formed in the main body 1 by a first flow hole 21 formed in the plug 2. The first cock portion 1a through which the first inlet 11 and the first outlet 12 are opened, and the second flow hole 22 formed in the plug 2 are formed in the main body 1. A second cock portion 1b through which a second inlet 13 and a second outlet 14 are opened, wherein the first cock portion 1a and the second cock portion 1b It is opened and closed in parallel by the operation, and
A cock configured as described in (1) or (2). (1). The second inlet 1 in the second cock part 1b.
3 or the second outlet 14 and the second flow hole 22
The first inflow port 11 and the first outflow port 12 of the first cock 1a start opening slightly earlier than the opening of the first inflow port 11, and the first inflow port 11 and the first outflow port are opened. 12 are formed slightly offset from each other so that they begin to close slightly later than they do. (2). The first inlet 1 in the first cock part 1a.
The first or first outlet 12 and the first flow hole 21 are
The second inlet 13 and the second outlet 14 of the second cock portion 1b start opening slightly later than the opening of the second outlet 13 and the second outlet 13 and the second outlet 13 and the second outlet. 14 are slightly offset from each other so that they begin to close slightly earlier than they do. 2. A first cock portion 3a and a second cock portion 3b are inserted into the main body 3 in a state where the plug 4 is rotated in a liquid-tight manner and within a predetermined angle range. When the plug 4 is rotated by a predetermined angle in one direction, a first inlet 31 and a first outlet 32 respectively formed in the main body 3 are formed in the plug 4. Opened by the first circulation hole 41
When the plug 4 is rotated by a predetermined angle in the other direction, the first inlet 31 and the first outlet 32 are opened by a second flow hole 42 formed in the plug 4. When the plug 4 is rotated at a predetermined angle in one direction, the second cock portion 3b has a second inlet 33 and a second outlet 34 formed in the main body 3, respectively. Opened by a third flow hole 43 formed in the plug 4 and a fourth flow hole 44 communicating with the flow hole 43, a third flow inlet 35 formed in the main body 3, The third outlet 36 is opened by a fifth flow hole 45 formed in the plug 4, and when the plug 4 is rotated by a predetermined angle in the other direction, the second inlet 33 and the third 3 and the fourth outlet hole 4
4 wherein the first cock 3a and the second cock 3b are configured as in the following (3) or (4). . (3). The third inlet 3 in the second cock part 3b.
The fifth or third outlet 36 and the fifth flow hole 45 and the second inlet 33 or the third outlet 36 and the fourth flow hole 44 are connected to each other in the first cock portion 3a. The first inlet 31 and the first outlet 32 start opening slightly earlier than the opening of the first inlet 31 and the first inlet 31
The first outlet 32 and the first outlet 32 are formed so as to slightly close to each other so as to start closing later. (4). The first inflow port 3 in the first cock portion 3a.
The first or first outlet 32 and the first flow hole 41 are
The third inlet 35 and the third outlet 36 of the second cock 3b start opening slightly later than the opening of the third outlet 35, and the third inlet 35 and the third outlet 36 Are slightly shifted from each other so as to start closing slightly earlier than closing, and the first inlet 31 or the first outlet 32 and the second outlet 32 in the first cock portion 3a are formed. The communication hole 42 starts opening slightly later than the opening of the second inlet 33 and the third outlet 36 in the second cock portion 3b.
The inlet 33 and the third outlet 36 are slightly shifted from each other so as to start closing slightly earlier than they start closing.