Stopcock

Abstract

To provide a stop valve which can be opened / closed with smaller force than force to open / close a ball stop valve.SOLUTION: A stop valve 1 includes a housing 8, and a spindle 10 rotatably supported by the housing 8, the housing 8 having a primary side pipe part 21 including a primary side flow path 21a, a secondary side pipe part 22 including a secondary side flow path 22a, and a communication part 23 including an internal flow path 25 communicating the primary side flow path 21a with the secondary side flow path 22a, the internal flow path 25 being provided with an opening / closing mechanism 60, the opening / closing mechanism 60 having a fixed disc 62 having a seal part 67 for sealing the internal flow path 25, and an opening part 68 provided in part in the peripheral direction of the seal part 67, and a turn disc 63 including a communication port 71 which overlaps with the opening part 68 when arranged at a first angle position around an axis L of the spindle 10 and overlaps with the seal part 67 when arranged at a second angle position different from the first angle position, the fixed disc 62 and the turn disc 63 being each formed of ceramic.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a water stop valve disposed in the middle of a pipe through which water flows.

Background Art

[0002] As a water stop valve, a ball water stop valve that stops water by rotating a ball valve body is known. The ball water stop valve described in Patent Document 1 includes a water passage extending linearly, a valve chamber provided in the middle of the water passage, two annular valve seats arranged coaxially with the water passage in the valve chamber, a ball valve body accommodated in the valve chamber while being sandwiched between the two valve seats, and a valve rod connected to the valve body. The valve rod extends in a direction perpendicular to the water passage. The ball valve body has a communication passage penetrating through the center in a direction perpendicular to the axis of the valve rod. When an operator operating the water stop valve rotates the valve rod by 90°, the ball valve body rotates between a water passing position where the communication passage communicates with the water passage and a water stopping position where the communication passage and the water passage do not communicate.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The ball valve body is made of metal. The valve seat in close contact with the ball valve body is a sealing member made of resin or rubber. Further, when the ball water stop valve is opened and closed, the ball valve body slides in contact with the two valve seats in close contact. Due to these, a relatively large force is required to open and close the water stop valve.

[0005] In view of such points, an object of the present invention is to provide a water stop valve that can be opened and closed with a force smaller than the force for opening and closing a ball water stop valve.

Means for Solving the Problems

[0006] In order to solve the above problems, the water stop plug of the present invention includes a primary side pipe portion having a primary side flow path, a secondary side pipe portion having a secondary side flow path, and a communication portion having an internal flow path that communicates the primary side flow path and the secondary side flow path, a housing having the same, a spindle rotatably supported by the housing, having a protruding portion protruding into the internal flow path on one side in the axial direction, and having an exposed portion exposed outside the housing on the other side, and an opening / closing mechanism for opening and closing the internal flow path 、 and has, and the opening / closing mechanism is , a disk washer, and via the disk washer a rotating disk connected to the protruding portion and rotating integrally with the spindle, and a fixed disk fixed in the internal flow path and in surface contact with the rotating disk. The fixed disk includes a blocking portion that blocks the internal flow path and an opening provided in a part of the circumferential direction of the blocking portion. The rotating disk has a communication port that overlaps the opening when disposed at a first angular position around the axis of the spindle and overlaps the blocking portion when disposed at a second angular position different from the first angular position. The fixed disk and the rotating disk are made of ceramic The disk washer is a plate-shaped member made of resin, attached to the rotating disk and integrated with the rotating disk. It has a fitting hole in the center for the tip of the protruding portion to fit into, and a through hole communicating with the communication port on the outer peripheral side of the fitting hole. The through hole communicates with the fitting hole in the radial direction. When the protruding portion fits into the fitting hole, the spindle and the disk washer cannot rotate relative to each other, and the rotating disk is connected to the spindle via the disk washer and rotates integrally with the spindle. and is characterized by this.

[0007] The water stop plug of the present invention opens and closes the internal flow path by an opening / closing mechanism including a fixed disk and a rotating disk to conduct and stop water flow. That is, by rotating the spindle, the rotating disk is rotated, and water flow is conducted by overlapping the opening of the fixed disk and the communication port of the rotating disk, and water flow is stopped by overlapping the blocking portion of the fixed disk and the communication port of the rotating disk. Here, the fixed disk and the rotating disk are made of ceramic and have high hardness. Therefore, compared with the case where a metal valve body slidably contacts two valve seats made of resin or rubber, the friction when the rotating disk slidably contacts the fixed disk can be reduced. Thus, a metal ball valve When compared with the case of opening and closing a ball stopcock having a body and two valve seats made of resin or rubber, the stopcock can be opened and closed with a small force. Also, since the fixed disk and the rotating disk are made of ceramic, they are less likely to adhere compared to the case where they are made of metal, and even when they adhere, the frictional force due to adhesion is small compared to the case where they are made of metal. Therefore, the stopcock can be opened and closed with a small force compared to the case where the fixed disk and the rotating disk are made of metal. Furthermore, since the fixed disk and the rotating disk are made of ceramic, it is possible to prevent or suppress wear of the fixed disk and the rotating disk compared to the case where they are made of resin. Therefore, it becomes easy to ensure the product life.

[0008] In the present invention, It has an electric actuator fixed to the housing and connected to the exposed portion, and the actuator rotates the spindle. it can be made to be

[0009] Here, the stopcock of the present invention can be opened and closed with a relatively small force. Therefore, according to the present invention, even if the torque for the actuator to rotate the spindle is small, the stopcock can be opened and closed. Thus, the actuator can be provided with a battery as a power source. That is, the actuator can be provided with a battery as a power source inside.

[0010] In the present invention, the primary side pipe portion includes an upstream side pipe portion extending in a direction orthogonal to the axis of the spindle at the upstream end portion in the water flow direction, the secondary side pipe portion includes a downstream side pipe portion extending in a direction orthogonal to the axis at the downstream end portion in the flow direction, and the internal flow path can extend in the axial direction along the axis.

[0011] In this case, the upstream side pipe portion and the downstream side pipe portion can be coaxial. In this way, the stopcock can be installed in the middle of a linearly extending pipe.

[0012] Further, the first pipe axis of the upstream pipe portion and the second pipe axis of the downstream pipe portion can intersect. In this way, by installing a stop valve in the middle of the pipe, the pipe can be bent at the stop valve.

Advantages of the Invention

[0013] According to the present invention, a stop valve that can be opened and closed with a small force can be provided as compared with the case of opening and closing a ball stop valve having a metal ball valve body and two resin valve seats.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0015] Hereinafter, with reference to the drawings, a stop valve which is an embodiment of the present invention will be described.

[0016] Fig. 1 is a perspective view of a stop valve to which the present invention is applied. Fig. 2 is a cross-sectional view of the stop valve in a water passing state. Fig. 3 is an exploded perspective view of the stop valve when viewed from one side in the axial direction of the spindle. Fig. 4 is an exploded perspective view of the stop valve when viewed from the other side in the axial direction of the spindle. Fig. 5 is an explanatory view of the opening and closing mechanism in a water passing state.

[0017] As shown in FIG. 1, the water stop valve 1 of this example is installed between the primary side pipe 2 and the secondary side pipe 3 laid in a straight line. The water stop valve 1 has a water stop valve body 5 and an electric actuator 6 fixed to the water stop valve body 5. The water stop valve body 5 includes a housing 8 and a spindle 10 having an exposed portion 9 exposed to the outside from the housing 8. The housing 8 includes an upstream pipe portion 11 connected to the primary side pipe 2 and a downstream pipe portion 12 connected to the secondary side pipe 3. The upstream pipe portion 11 and the downstream pipe portion 12 are coaxial, and the first pipe axis N1 of the upstream pipe portion 11 and the second pipe axis N2 of the downstream pipe portion 12 coincide. The axis L of the spindle 10 is orthogonal to the first pipe axis N1 and the second pipe axis N2. The water passing through the water stop valve 1 flows in from the upstream pipe portion 11 and flows out from the downstream pipe portion 12.

[0018] The actuator 6 is fixed to the housing 8 and connected to the exposed portion 9 of the spindle 10. The actuator 6 includes a battery 15 as a power source. The battery 15 is a dry battery or a rechargeable secondary battery. Further, the actuator 6 includes a drive unit such as a motor driven by a power source. The actuator 6 rotates the spindle 10 around its axis L. In this example, the actuator 6 rotates the spindle 10 in a predetermined rotation direction R1 around the axis L.

[0019] In this example, the drive signal for driving the actuator 6 is input to the actuator 6 by wireless communication. The actuator 6 rotates the spindle 10 by 90° every time a drive signal is input. Note that the drive signal may be input to the actuator 6 from a device connected by wire. Further, the actuator 6 may include a drive switch for inputting a drive signal to the actuator 6, and the spindle 10 may be rotated by 90° every time the drive switch is operated.

[0020] In the following description, the direction along the axis L of the spindle 10 is defined as the Z-axis direction. The tube axis direction in which the first tube axis N1 and the second tube axis N2 extend is defined as the X-axis direction. The direction orthogonal to the Z-axis direction and the X-axis direction is defined as the Y-axis direction. Also, in the Z-axis direction, the side where the stopcock body 5 is located is defined as the Z1 direction, and the side where the actuator 6 is located is defined as the Z2 direction. In the Y-axis direction, the side where the upstream tube portion 11 is located is defined as the X1 direction, and the side where the downstream tube portion 12 is located is defined as the X2 direction. Also, in the following description, the direction in which water flows through the stopcock 1 is referred to as the flow direction.

[0021] As shown in FIG. 2, the housing 8 includes a primary side tube portion 21, a secondary side tube portion 22, and a communication portion 23 located between the primary side tube portion 21 and the secondary side tube portion 22. The primary side tube portion 21 includes a primary side flow path 21a inside. The secondary side tube portion 22 includes a secondary side flow path 22a inside. The communication portion 23 includes an internal space 23a that communicates the primary side flow path 21a and the secondary side flow path 22a. An internal flow path 25 is partitioned in the internal space 23a by a flow path partitioning member 24. The internal flow path 25 extends in the Z-axis direction.

[0022] The primary side tube portion 21 includes, in order from upstream to downstream, an upstream tube portion 11 and an upstream extension portion 27. The upstream extension portion 27 is located in the Z1 direction of the internal flow path 25. The upstream extension portion 27 communicates with the internal flow path 25 from the Z1 direction side. The secondary side tube portion 22 includes, in order from upstream to downstream, a downstream extension portion 28 and a downstream tube portion 12. The downstream extension portion 28 is located in the Z2 direction of the flow path partitioning member 24. The downstream extension portion 28 communicates with the internal flow path 25 on the Z2 direction side.

[0023] Here, as shown in FIG. 1, the housing 8 includes a main body member 31 and a lid member 32 that covers the main body member 31 from the Z2 direction side. The main body member 31 and the lid member 32 are bronze castings. As shown in FIG. 2, the lid member 32 defines the inner wall surface in the Z2 direction of the downstream extension portion 28. The lid member 32 includes a support portion 35 that rotatably supports the spindle 10 and an It has a fixing portion 36 for fixing the actuator 6. As shown in FIG. 1, the lid member 32 is fastened to the main body member 31 by four bolts 37.

[0024] As shown in FIG. 2, the spindle 10 includes a large-diameter shaft portion 41 supported by the support portion 35 and a small-diameter shaft portion 42 extending in the Z1 direction from the support portion 35. Two O-rings are interposed between the support portion 35 and the large-diameter shaft portion 41. The end portion of the large-diameter shaft portion 41 in the Z2 direction is an exposed portion 9 that is exposed outside the housing 8. The small-diameter shaft portion 42 reaches the internal flow path 25 through the downstream extension portion 28. A plate portion 43 (protrusion) having a rectangular shape when viewed in the Z-axis direction is provided at the end of the small-diameter shaft portion 42 in the Z1 direction.

[0025] As shown in FIGS. 3 and 4, in this example, the spindle 10 is configured by coaxially connecting two members, a spindle main body 45 and an upper spindle 46. The spindle main body 45 includes the small-diameter shaft portion 42 and the plate portion 43. The spindle main body 45 is made of stainless steel. The upper spindle 46 includes the large-diameter shaft portion 41. The upper spindle 46 is a bronze continuous casting bar.

[0026] Here, as shown in FIG. 2, the flow path partitioning member 24 includes a disk case 51 and a disk holder 52 that covers the disk case 51 from the side in the Z2 direction. The disk case 51 and the disk holder 52 are made of resin. As shown in FIGS. 3 and 4, the disk case 51 includes a circular case bottom portion 53 and a case cylindrical portion 54 that extends in the Z2 direction from the outer peripheral edge of the case bottom portion 53. The case bottom portion 53 is provided with a plurality of case openings 55. The disk case 51 is fixed to the communication portion 23, and the case openings 55 communicate with the upstream side extending portion 27. The disk holder 52 includes a circular holder ceiling portion 56 and a holder cylindrical portion 57 that extends in the Z1 direction from the outer peripheral edge of the holder ceiling portion 56. The holder ceiling portion 56 is provided with a plurality of holder openings 58. As shown in FIG. 2, in the disk holder 52, the holder cylindrical portion 57 is inserted into the case cylindrical portion 54 from the side in the Z2 direction and fixed to the disk case 51. In the disk case 51, the holder openings 58 in the holder ceiling portion 56 communicate with the downstream side extending portion 28.

[0027] An opening / closing mechanism 60 for opening and closing the internal flow path 25 is provided in the internal flow path 25. As shown in FIGS. 2, 3, and 4, the opening / closing mechanism 60 includes, in order from the case bottom portion 53 of the disk case 51 toward the Z2 direction, a packing 61, a fixed disk 62, a rotating disk 63, and a disk washer 64.

[0028] The fixed disk 62 is made of ceramic. The fixed disk 62 is fixed to the disk case 51. Therefore, the fixed disk 62 is fixed to the communication portion 23 via the disk case 51. The end face of the fixed disk 62 in the Z2 direction is a smooth surface. As shown in FIGS. 3 and 4, the fixed disk 62 includes a blocking portion 67 that blocks the internal flow path 25 and a pair of openings 68 provided at two locations in the circumferential direction of the blocking portion 67. Each opening 68 has a fan-shaped shape that expands toward the outer peripheral side when viewed from the direction of the axis L. The pair of openings 68 are provided at an angular interval of 180° around the axis L.

[0029] The packing 61 is made of silicone rubber. The packing 61 is interposed between the disk case 51 and the rotating disk 63 in the Z-axis direction to seal between each opening 68 of the fixed disk 62 and the blocking portion 67.

[0030] The rotating disk 63 is made of ceramic. As shown in FIGS. 3 and 4, the rotating disk 63 is a disk having communication ports 71 at two locations in the circumferential direction. The pair of communication ports 71 are provided at an angular interval of 180° around the axis L. The rotating disk 63 is coaxially overlapped with the fixed disk 62. The rotating disk 63 and the fixed disk 62 are in surface contact. The outer diameter dimension of the rotating disk 63 is slightly shorter than the outer diameter dimension of the fixed disk 62. In the rotating disk 6 3, the end face in the Z1 direction that contacts the fixed disk 62 is a smooth surface. The rotating disk 63 is provided with a plurality of notch recesses 72 at the outer peripheral edge of the end face in the Z1 direction.

[0031] The disk washer 64 is a plate-shaped member having a circular contour shape. The disk washer 64 is made of resin. The disk washer 64 is provided with fan-shaped through holes 75 at two locations in the circumferential direction. Further, the disk washer 64 is provided with a fitting hole 76 at the center. The two through holes 75 communicate with the fitting hole 76 in the radial direction. Furthermore, the disk washer 64 is provided with a plurality of locking protrusions 77 at the outer peripheral edge of the end face in the Z1 direction.

[0032] The disk washer 64 is integrated with the rotating disk 63 by fitting each locking protrusion 77 into each notch recess 72 of the rotating disk 63. When the disk washer 64 is integrated with the rotating disk 63, each through hole 75 of the disk washer 64 communicates with each communication port 71 of the rotating disk 63. Here, when the plate portion 43 of the spindle 10 is fitted into the fitting hole 76 of the disk washer 64, the rotating disk 63 is connected to the spindle 10 via the disk washer 64. Thereby, the rotating disk 63 rotates integrally with the spindle 10.

[0033] In this example, the fixed disk 62 and the rotating disk 63 are made of alumina. The fixed disk 62 and the rotating disk 63 can be made of silicon nitride, silicon carbide, zirconia, etc.

[0034] (Opening and closing operation of the stop valve) FIG. 5 is an explanatory diagram of the opening and closing mechanism 60 in the water passing state. In FIG. 5, the positional relationship among the fixed disk 62, the rotating disk 63, and the disk washer 64 in the water passing state is shown. FIG. 6 is a cross-sectional view of the stop valve 1 in the water shut-off state. FIG. 7 is an explanatory diagram of the opening and closing mechanism 60 in the water shut-off state. In FIG. 7, the positional relationship among the fixed disk 62, the rotating disk 63, and the disk washer 64 is shown.

[0035] As shown in FIGS. 2 and 5, in the water passing state, the rotating disk 63 is arranged at the first angular position 63A. When the rotating disk 63 is arranged at the first angular position 63A, the communication port 71 of the rotating disk 63 and the through hole 75 of the disk washer 64 overlap the opening 68 of the fixed disk 62. Thereby, since the internal flow path 25 is in an open state, the primary side pipe 2 and the secondary side pipe 3 communicate with each other via the stop valve 1. In this example, the opening 68 of the fixed disk 62 is provided larger in the circumferential direction than the communication port 71 of the rotating disk 63. Therefore, as shown by the dashed line in FIG. 5, in the water passing state, the opening 68 of the fixed disk 62 has an opening portion 68a that does not overlap the communication port 71 behind the communication port 71 in the rotation direction R1.

[0036] When changing the stop valve 1 from the water - passing state to the water - stopping state, a drive signal is input to the actuator 6. When the drive signal is input, the actuator 6 rotates the spindle 10 by 90° in the rotation direction R1 indicated by the arrows in FIGS. 2 and 5. As a result, the rotating disk 63 rotates by 90° and is disposed at the second angular position 63B. When the rotating disk 63 is disposed at the second angular position 63B, the stop valve 1 assumes the water - stopping state shown in FIGS. 6 and 7. In the water - stopping state, the communication port 71 of the rotating disk 63 and the through - hole 75 of the disk washer 64 overlap the blocking portion 67 of the fixed disk 62. Thereby, the internal flow path 25 is in a closed state, so the primary - side pipe 2 and the secondary - side pipe 3 are blocked from each other.

[0037] After that, when a drive signal is input to the actuator 6, the actuator 6 rotates the spindle 10 by a further 90°. As a result, when the rotating disk 63 rotates by 90°, the stop valve 1 assumes the same water - passing state as shown in FIGS. 2 and 5.

[0038] (Function and effect) The stop valve 1 in this example opens and closes the internal flow path 25 by the opening - closing mechanism 60 including the fixed disk 62 and the rotating disk 63 to perform water - passing and water - stopping operations. That is, by rotating the spindle 10, the rotating disk 63 is rotated, and water - passing is performed by overlapping the opening 68 of the fixed disk 62 and the communication port 71 of the rotating disk 63, and water - stopping is performed by overlapping the blocking portion 67 of the fixed disk 62 and the communication port 71 of the rotating disk 63.

[0039] Here, the fixed disk 62 and the rotating disk 63 are made of ceramic and have high hardness. Therefore, compared with the case where a metal valve body like a ball stopcock slides on two valve seats made of resin or rubber, the friction when the rotating disk 63 slides on the fixed disk 62 can be reduced. Thus, the stopcock 1 can be opened and closed with a smaller force compared with the case of opening and closing the ball stopcock 1 having a metal ball valve body and two valve seats made of resin or rubber that are in close contact with the ball valve body. Also, since the fixed disk 62 and the rotating disk 63 are made of ceramic, they are less likely to adhere compared with the case where they are made of metal, and even when they adhere, the frictional force due to adhesion is smaller compared with the case where they are made of metal. Therefore, the stopcock 1 can be opened and closed with a smaller force compared with the case where the fixed disk 62 and the rotating disk 63 are made of metal.

[0040] Also, since the fixed disk 62 and the rotating disk 63 are made of ceramic, wear of the fixed disk 62 and the rotating disk 63 can be prevented or suppressed compared with the case where they are made of resin. Therefore, it becomes easy to ensure the product life of the stopcock 1.

[0041] Here, the stopcock 1 of this example has an electric actuator 6 fixed to the housing 8 and connected to the spindle 10. Therefore, by inputting a drive signal to the actuator 6, the stopcock 1 can be opened and closed. Also, the stopcock 1 of this example can be opened and closed with a relatively small force. Therefore, even if the force with which the actuator 6 rotates the spindle 10 is small, the stopcock 1 can be opened and closed. Thus, as in this example, as the actuator 6, one having a battery 15 as a power source can be adopted.

[0042] In this example, the primary side pipe portion 21 includes an upstream side pipe portion 11 that extends in a direction perpendicular to the axis L of the spindle 10 at the upstream end portion in the water flow direction. Also, the secondary side pipe portion 22 includes a downstream side pipe portion 12 that extends in a direction perpendicular to the axis L at the downstream end portion in the flow direction. The internal flow path 25 extends in the direction of the axis L along the axis L. The upstream side pipe portion 11 and the downstream side pipe portion 12 are coaxial. Therefore, the stopcock 1 can be installed between the primary side pipe 2 and the secondary side pipe 3 laid in a straight line.

[0043] (Modified Example) FIG. 8 is a perspective view of the water stop plug of the modified example. As shown in FIG. 8, in the water stop plug 1A of the modified example, the upstream pipe portion 11 and the downstream pipe portion 12 extend in intersecting directions. In this example, the first pipe axis N1 of the upstream pipe portion 11 and the second pipe axis N2 of the downstream pipe portion 12 are perpendicular to each other. Other configurations of the water stop plug 1A are the same as those of the water stop plug 1.

[0044] The water stop plug 1A of this example can bend the pipe by being installed in the middle of the pipe. That is, the extending direction of the primary side pipe 2 and the extending direction of the secondary side pipe 3 can be made to intersect.

[0045] Here, in the ball water stop plug 1 that rotates the ball valve body by 90° to conduct and stop water, a communication passage extending linearly is formed in the ball valve body. Therefore, in the ball water stop plug 1, it is necessary to provide a straight water passage through the valve chamber and accommodate the ball valve body in the valve chamber. Otherwise, it will be difficult to conduct and stop water by rotating the ball valve body by 90°. This is because.

[0046] In contrast, the water stop plugs 1 and 1A are provided with an internal flow path 25 extending in a direction perpendicular to the first pipe axis N1 of the upstream pipe portion 11 and the second pipe axis N2 of the downstream pipe portion 12 between the upstream pipe portion 11 connected to the primary side pipe 2 and the downstream pipe portion 12 connected to the secondary side pipe 3, and the internal flow path 25 is opened and closed by the fixed disk 62 and the rotating disk 63. Therefore, it is not necessary to linearly provide the downstream pipe portion 12 connected to the primary side pipe 2 and the upstream pipe portion 11 connected to the secondary side pipe 3, and the downstream pipe portion 12 and the upstream pipe portion 11 can be provided at desired angular positions around the axis L of the spindle 10. Thus, by making the first pipe axis N1 of the upstream pipe portion 11 and the second pipe axis N2 of the downstream pipe portion 12 perpendicular to each other, as in the water stop plug 1A of this example, the pipe can be bent by 90° in the water stop plug 1.

[0047] Note that the actuator 6 may rotate the spindle 10 in both directions around the axis L.

[0048] Also, in the stop valves 1 and 1A, the actuator 6 may be omitted. In this case, a handle for operating the spindle 10 can be attached to the exposed portion 9 of the spindle 10.

Explanation of Reference Numerals

[0049] 1... Stop valve, 2... Primary side pipe, 3... Secondary side pipe, 5... Stop valve body, 6... Actuator, 8... Housing, 9... Exposed portion, 10... Spindle, 11... Upstream side pipe portion, 12... Downstream side pipe portion, 15... Battery, 21... Primary side pipe portion, 21a... Primary side flow path, 22... Secondary side pipe portion, 22a... Secondary side flow path, 23... Communication portion, 23a... Internal space, 24... Flow path partitioning member, 25... Internal flow path, 27... Upstream side extended portion, 28... Downstream side extended portion, 31... Body member, 32... Cover member, 35... Support portion, 36... Fixing portion, 37... Bolt, 41... Large diameter shaft portion, 42... Small diameter shaft portion, 43... Plate portion, 45... Spindle body, 46... Upper spindle, 51... Disk case, 52... Disk holder, 53... Case bottom portion, 54... Case cylindrical portion, 55... Case opening, 56... Holder ceiling portion, 57... Holder cylindrical portion, 58... Holder opening, 61... Packing, 62... Fixed disk, 63... Rotating disk, 64... Disk washer, 67... Blocking portion, 68... Opening portion, 71... Communication port, 72... Notch recess, 75... Through hole, 76... Fitting hole, 77... Locking projection, L... Axis of the spindle, N1... First pipe axis, N2... Second pipe axis, R1... Rotation direction

Claims

1. A housing having a primary side pipe portion provided with a primary side flow path, a secondary side pipe portion provided with a secondary side flow path, and a communication portion provided with an internal flow path that communicates the primary side flow path and the secondary side flow path, A spindle rotatably supported by the housing, having a protruding portion that protrudes into the internal flow path on one side in the axial direction and an exposed portion that is exposed outside the housing on the other side, An opening / closing mechanism for opening and closing the internal flow path, The opening / closing mechanism includes a disk washer, a rotating disk connected to the protruding portion via the disk washer and rotating integrally with the spindle, and a fixed disk fixed in the internal flow path and in surface contact with the rotating disk, The fixed disk includes a blocking portion that blocks the internal flow path and an opening provided in a circumferential part of the blocking portion, The rotating disk includes a communication port that overlaps the opening when disposed at a first angular position around the axis of the spindle and overlaps the blocking portion when disposed at a second angular position different from the first angular position, The fixed disk and the rotating disk are made of ceramic, The disk washer is a resin-made plate-like member attached to the rotating disk and integrated with the rotating disk, and includes a fitting hole in the center into which the tip portion of the protruding portion fits, and a through hole that communicates with the communication port on the outer peripheral side of the fitting hole, The through hole communicates with the fitting hole in the radial direction, When the protruding portion fits into the fitting hole, the spindle and the disk washer are non-rotatable relative to each other, and the rotating disk is connected to the spindle via the disk washer and the rotating disk rotates integrally with the spindle. A water stop plug characterized by this.

2. Having an electric actuator fixed to the housing and connected to the exposed portion, The actuator rotates the spindle. The water stop plug according to claim 1, characterized by this.

3. The actuator includes a battery as a power source inside, and rotates the spindle. The water stop plug according to claim 2, characterized by this.

4. The primary side pipe portion includes an upstream side pipe portion extending in a direction perpendicular to the axis of the spindle at an upstream end portion in the water flow direction, The secondary side pipe portion includes a downstream side pipe portion extending in a direction perpendicular to the axis at a downstream end portion in the flow direction. ​ The stop valve according to any one of claims 1 to 3, wherein the internal flow path extends in an axial direction along the axis.

5. The stop valve according to claim 4, wherein the upstream pipe portion and the downstream pipe portion are coaxial.

6. The stop valve according to claim 4, wherein a first pipe axis of the upstream pipe portion and a second pipe axis of the downstream pipe portion intersect.

Images