JP2009108998A - On-off valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-off valve which can stably secure a predetermined sealing performance and waterproof performance against repeated use over a long time, achieving simplification of maintenance control and reduction of maintenance costs, and capable of being smoothly and lightly operated by almost use of the characteristics of ceramic properties. <P>SOLUTION: A movable ceramic disk 6 is held between a pair of fixed ceramic disks 5A, 5B fixed in parallel with each other with a space in the water flowing direction in a tubular valve body 4 having an inlet port 2 and an outlet port 3 with both sides placed in close contact with the opposing surfaces of the fixed disks. The valve can be switched to a valve open state of allowing the inlet port 2 and outlet port 3 to communicate with each other by overlapping the inlet port 2 and the outlet port 3 and a valve closed state of inhibiting the inlet port 2 and outlet 3 to communicate with each other by not overlapping the inlet port 2 and the outlet port 3 with each other by turning the movable disk 6 around the axis a of the valve body 4 to relatively turning the disk 6 to the disks 5A, 5B. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a faucet such as a two-handle type hot water / water mixing tap provided with a water handle and a hot water handle, or a single lever type hot water / water mixing tap in which the mixing amount of hot water can be adjusted by one lever operation. Opening and closing used between the branch port and the water hose to water treatment equipment such as showers, dishwashers, and water purifiers, or between the faucet of the bathroom vanity or sink, and the middle of the water supply pipe It relates to valves.

  This type of on-off valve basically has a fixed disk and a movable disk in close contact with it in a cylindrical valve body having a primary side inlet and a secondary side outlet, and the movable disk is connected via a lever. A valve opening state in which the valve holes formed in the fixed disk and the movable disk are overlapped to communicate with each other, and the valves of the both disks are operated by rotating around the axis of the valve body. The holes are non-polymerized and can be switched to a closed state in which communication between the inlet and the outlet is blocked.

  In the on-off valve having the basic configuration as described above, packing is generally used as a watertight seal means for preventing water leakage from the relative sliding surfaces of the fixed disk and the movable disk that are in close contact with each other in the closed state. In this way, when packing is interposed on the relative sliding surfaces of both discs, not only the valve opening / closing operation tends to be heavy, but also the packing is subject to wear and deterioration over time due to repeated valve opening / closing operations. There is also a problem that the predetermined water-tight sealing performance and water-stopping performance cannot be stably maintained for a long time due to the wear of the relative sliding surface.

  As means for solving such difficulties, both the fixed disk and the movable disk are made of ceramic having excellent durability, wear resistance, and surface smoothness, and the opposing smooth surfaces of the ceramic fixed disk and the movable disk are opposed to each other. Many open / close valves that have been brought into close contact with each other to have a relative sliding surface have been proposed (see, for example, Patent Documents 1 to 3).

  Japanese Patent No. 3967959   JP 2006-9955 A   JP-A-7-229573

  In the case of the conventional on-off valve shown in Patent Documents 1 to 3, the opposed surfaces excellent in surface smoothness, durability and wear resistance of the ceramic fixed disk and movable disk are in direct contact with each other. In order to form a relative sliding surface, it is possible to reduce the cost by reducing the number of parts by eliminating the use of packing. It is possible to prevent water leakage from the moving surface and improve the predetermined watertight sealing performance and water stopping performance.

  However, as described above, in the case of the conventional on-off valve in which the ceramic fixed disk and the ceramic movable disk are used one by one and their opposed surfaces are in close contact with each other, the other of the movable disks (relative sliding surface) In order to ensure a watertight seal between the non-operating side) and the fixed valve body part facing it, it is necessary to interpose a packing between the movable part (movable disc) and the valve body fixed part. As a result, it is not only unavoidable that the valve opening / closing operation becomes heavy due to the rotation of the movable disk, but the packing that slides on the other surface of the movable disk due to repeated valve opening / closing operation wears out in a short period of time. There is a problem that the sealing performance between the movable disk and the valve main body and the water stopping performance cannot be secured stably over a long period of time. In addition, it is necessary to frequently replace the packing, and there is a problem that the maintenance of the valve tends to be troublesome and the maintenance cost becomes high.

  The present invention has been made in view of the above circumstances, and can make the valve opening / closing operation smooth and nimble by making the best use of ceramic characteristics, simplifying maintenance and reducing maintenance costs. In addition, an object of the present invention is to provide an on-off valve that can stably ensure predetermined sealing performance and water stoppage performance even for repeated use over a long period of time.

  The on-off valve according to the present invention devised to achieve the above object includes a cylindrical valve body having a primary side inlet and a secondary side outlet, and an interval in the direction of water flow in the valve body. A pair of ceramic fixed disks arranged parallel to each other and fixed in a watertight seal to the valve body, and both surfaces of the pair of fixed disks are in close contact with the opposing surfaces of the pair of fixed disks. A ceramic movable disk that is sandwiched and held in a state and supported rotatably around the axis of the valve body, and an opening / closing operation lever that rotates the movable disk around the axis. Valve holes formed in the pair of fixed and movable disks are overlapped by the relative rotation of the fixed and movable disks in accordance with the rotation operation, and the inlet and the outlet are communicated with each other. A valve state, the valve hole between the two discs is characterized in that the communication between the non-polymerized and has been the inlet and the outlet is configured to be switched between a closed state to be cut off.

  According to the on-off valve according to the present invention having the above-described characteristic configuration, both surfaces of the ceramic movable disk excellent in surface smoothness and wear resistance and the surfaces of the pair of ceramic fixed disks sandwiching and holding the movable disk Since the relative sliding surface is formed by the close contact with the opposing surfaces with excellent smoothness and wear resistance, the resistance during rotation of the movable disk is reduced and the valve opening and closing operation is smooth and light. In addition, since the wear of the relative sliding surfaces hardly occurs, even if the valve opening / closing operation is repeated, high sealing performance that reliably prevents water leakage from the relative sliding surfaces can be obtained. Moreover, it is only necessary to provide a watertight seal between a pair of fixed disks that do not slide relative to each other and a fixed valve body portion, for example, with a sealant such as a packing, and the sealant such as a seal for the watertight seal is movable. Since there is no risk of being worn or damaged by the rotation of the disk, it is not necessary to replace the seal material frequently, simplifying maintenance and reducing maintenance costs, but a pair of fixed Water leakage from between the disc and the valve main body portion can be reliably prevented and high sealing performance can be obtained. By adopting a configuration that makes the most effective use of ceramic characteristics in this way, there is an effect that the predetermined sealing performance and water stop performance of the entire valve can be stably secured for long-term use.

In the on-off valve according to the present invention, as described in claim 2, the valve main body is divided into two parts, a main body having the primary inlet and a main body having a secondary outlet. The pair of fixed disks are positioned by a plurality of pins that pass through the pair of fixed disks and are spanned between the opposing surface portions of the two divided main body portions, and the valve from one divided main body side. Two split main body parts are fixedly joined to each other by screwing the male screw end of one support shaft through the pair of fixed and movable disks along the axial center of the main body into the female screw on the other split main body side. It is preferable that it is comprised.
In this case, a pair of fixed disks can be reliably and highly accurately positioned with the plurality of pins, and each disk can be assembled and fixed and the split main body spacer can be fixed and joined using a single support shaft. The assembly work of the whole valve can be simplified by using as few parts as possible, and the assembly accuracy can be increased, thereby further improving the valve performance and reducing the cost.

  Further, as the opening / closing operation lever in the opening / closing valve according to the present invention, as described in claim 3, the opening / closing operation lever is formed integrally with the ceramic movable disk and protrudes outward from the valve body. Thus, although there are some difficulties in ceramic processing, it is possible to reduce costs and reduce assembly man-hours by reducing the number of parts.

Furthermore, as an on-off valve according to the present invention, as described in claim 4, the valve body is divided into two parts, a main body part having the primary side inlet and a main body part having a secondary side outlet. The pair of fixed disks and the movable disk are formed in a disc shape concentric with the axis of the valve body, and the same circle around the axes of the pair of fixed disks and the movable disk of the disk shape. A plurality of valve holes are formed in the circumferential portion at equal intervals in the circumferential direction, and a pair of fixed disks and a movable body are formed along the axial center portion of the valve body from one divided body side. It may be configured such that the two divided main body portions are fixedly joined to each other by screwing the male screw portion of one support shaft penetrating the disk into the female screw on the other divided main body portion side. .
In this case, ease of assembly and cost reduction can be achieved, and when the valve is opened, a plurality of valve holes formed in a pair of disk-shaped fixed disks and a plurality of valve holes formed in a movable disk Is a concentric circumferential part of the valve body axis, and the valve opening is polymerized at equal intervals in the circumferential direction. Water can be passed almost evenly.

Furthermore, as the opening / closing operation lever in the opening / closing valve according to claim 4, as described in claim 5, a small-diameter annular portion for fitting and holding a disk-shaped movable disk and two split main body portions. A large-diameter annular portion that is externally fitted to the fixed joint portion, and a lever portion that protrudes outward; and further, the small-diameter annular portion is engaged with a recess formed on an outer peripheral surface of the movable disk. It is desirable that the movable disk is formed of a separate material and a separate material from the movable disk with a convex portion that allows the movable disk to rotate integrally.
In this case, the ceramic movable disk only needs to be formed in a simple disk shape, so that ceramic processing becomes easier, and it is possible to finish both sides of the disk serving as the sliding surface with better smoothness. The sealing performance of the sliding surface can be further improved, and the amount of ceramic that is an expensive material can be reduced as much as possible.

Embodiments of the present invention will be described below.
FIG. 1 is an exploded perspective view showing a first embodiment of the on-off valve according to the present invention, FIG. 2 is a longitudinal side view in an assembled state, and FIG. 3 is a longitudinal front view taken along line XX in FIG.

  The on-off valve 1 shown in the first embodiment includes a cylindrical valve body 4 having a primary side inlet 2 and a secondary side outlet 3 and an appropriate interval in the water flow direction in the valve body 4 (this is A pair of fixed disks 5A, 5B arranged parallel to each other with a gap (corresponding to the thickness of a movable disk described later) and the axis a of the valve body 4 being held between the pair of fixed disks 5A, 5B. A movable disk 6 supported so as to be rotatable around and an opening / closing operation lever 7 for rotating the movable disk 6 about the axis a are provided.

  The valve body 4 is divided into two parts, a main body part 4A having the primary inlet 2 and a central water passage 8A connected thereto, and a main body part 4B having the secondary outlet 3 and a central water passage 8B connected thereto. Among them, connecting screw portions 9A and 9B are formed on the outer peripheral surfaces of the small-diameter portion 4a1 near the inlet 2 of one divided main body portion 4A and the small-diameter portion 4b1 near the outlet 3 of the other divided main body portion 4B. In addition, the large diameter portions 4a2 and 4b2 of the divided main body portions 4A and 4B have end portions with respect to the recesses 10A and 10B for storing and holding the fixed disks 5A and 5B and the movable disk 6 and the axis a. Eccentric water passages 11A and 11B communicating with the central water passages 8A and 8B are formed at the deviated portions, and the outer circumferences of the large diameter portions 4a2 and 4b2 of the divided main body portions 4A and 4B are concentric with each other. Uneven portion 4a5,4b5 to be fitted (see FIG. 2) is formed on.

Each of the pair of fixed disks 5A, 5B is processed into a disk shape from a ceramic such as Si ₂ O _3, and through holes 11a, 11b for attachment to the valve body 4 are formed at the center thereof. In addition, a plurality of (two, but three or more) through-holes 12A and 12B for positioning with respect to the valve body 4 are formed in the eccentric part, and the eccentric main parts 4A and 4B pass through the eccentric part. Valve holes 13A and 13B are formed at locations corresponding to the water channels 11A and 11B.

On the other hand, the movable disk 6 is processed into a substantially fan shape from a ceramic such as Si ₂ O ₃ , for example, and a through hole 14 for attachment to the valve body 4 is formed at the center of the fan. A valve hole 15 is formed in the eccentric portion, and the opening / closing operation lever 7 is integrally formed from the top of the fan of the movable disk 6. That is, the movable disk 6 and the opening / closing operation lever 7 are integrally formed of ceramic, and the opening / closing operation lever 7 has a central angle of 90 ° between the ends of the large-diameter portions 4a1 and 4b1 of the two divided body portions 4A and 4B. It protrudes outward of the valve body 4 through a notch 20 formed over the range.

The on-off valve 1 composed of the above components is assembled as follows.
That is, the ceramic movable disk 6 is sandwiched and held between the opposing surfaces of the pair of ceramic fixed disks 5A and 5B, and watertight sealing O-rings 18A and 18B are engaged with the other surfaces of the fixed disks 5A and 5B. After being held, a plurality of (two) parallel pins 16 are passed through the through holes 12A and 12B of the pair of fixed disks 5A and 5B, and both ends of these parallel pins 16 are connected to the two divided main body portions 4A and 4B. The two divided main body portions 4A and 4B are brought close to each other so as to be inserted into the holes formed in the opposing surface portions of the large diameter portions 4a2 and 4b2, and the irregularities on the outer periphery of the end portions of the large diameter portions 4a2 and 4b2 in these divided main body portions 4A and 4B When the parts 4a5 and 4b5 are fitted to each other, the parallel pin 16 is spanned between the two divided main body parts 4A and 4B, and a pair of sections are connected. Mick made fixed disk 5A, 5B and two split main body 4A, 4B recess 10A of, and housed in 10B, and performs temporary assembled in a state of being positioned with each other.

  Next, in the temporarily assembled state as described above, one support shaft 17 inserted from the inlet 2 of one divided main body portion 4A is moved from the projecting portion 4a3 connected to the large diameter portion 4a2 of the divided main body portion 4A. The through hole 11a, 11b of the pair of fixed disks 5A, 5B and the through hole 14 of the movable disk 6 sandwiched and held between the pair of fixed disks 5A, 5B are inserted into the other split main body portion. Each of the discs 5A, 5A and 5B is brought into close contact with the opposing surfaces of the pair of fixed discs 5A, 5B by screwing and tightening to a female screw formed on the protruding portion 4b3 connected to the large-diameter portion 4b2 of 4B. 2B and 6 are attached to the valve body 4, and the two split body portions 4A and 4B are fixedly joined in parallel and concentric to each other, so that the entire on-off valve 1 is disconnected as shown in FIG. Constitute assembled to the structure.

  In the opening / closing valve 1 assembled as described above, the movable disk 6 is turned into a pair of fixed disks 5A and 5B by rotating the opening / closing operation lever 7 protruding outward from the valve body 4 through the notch portion 20. On the other hand, by reciprocally rotating in the range of 90 °, the valve holes 13A and 13B of the pair of fixed disks 5A and 5B and the valve holes 15 of the movable disk 6 are superposed as shown by the phantom line in FIG. As shown by the solid line in FIG. 3, the valve holes 13A, 13B and 15 are connected to the inlet 2 and the outlet 3 through the central water passages 8A and 8B and the eccentric water passages 11A and 11B. The valve holes 15 of the movable disk 6 are closed by a pair of fixed disks 5A and 5B, and the valve is switched to a closed state in which the communication between the inlet 2 and the outlet 3 is blocked. Because That.

  For example, as shown schematically in FIG. 4, the on-off valve 1 as described above includes a branch port of a faucet 22 such as a single lever type hot and cold water mixing tap that can adjust the amount of hot water mixed by operating one lever 21. One of the connecting screw portions 9A of the valve body 4 is connected to the portion 23, and the other connecting screw portion 9B is connected to a water treatment device (not shown) such as a shower, a dishwasher, or a water purifier via a joint 24. It is used as a branch plug by being connected to the water guide hose 25, or although not shown, it is used by interposing between a water faucet such as a bathroom vanity or a sink and an intermediate portion of the water supply pipe.

  In the on-off valve 1 of the first embodiment described above, the movable disk 6 and the pair of fixed disks 5A and 5B sandwiched and held by the movable disk 6 are both ceramics having excellent surface smoothness, durability and wear resistance. Since the ceramic surfaces are in close contact with each other to form a relative sliding surface, the rotational resistance of the movable disk 6 can be reduced, and the valve opening / closing operation can be performed smoothly and lightly. Since the sliding surface is hardly worn or damaged, even if the valve opening / closing operation is repeated, high sealing performance that reliably prevents water leakage from the relative sliding surface can be obtained. Further, between the pair of fixed disks 5A, 5B that do not slide relative to each other and the fixed valve body 4 portion, for example, a watertight seal such as an O-ring 18A, 18B for watertight sealing may be interposed, Since the sealing material for watertight sealing is not worn or damaged by the rotation of the movable disk 6 and there is no risk of water leakage etc., it is not necessary to replace the sealing material frequently, simplifying maintenance and maintenance-free, reducing maintenance costs. While the reduction can be achieved, it is possible to maintain high sealing performance between the pair of fixed disks 5A and 5B and the valve body 4 portion. Therefore, combined with the high sealing performance of the relative sliding surface, the sealing performance and water stopping performance of the entire valve can be ensured stably for long-term use.

  Further, as in the first embodiment, in the on-off valve 1 in which the valve main body 4 is divided, the pair of fixed disks 5A and 5B can be reliably and accurately positioned using a plurality of parallel pins 16. Since the disc 5A, 5B, 6 can be assembled and fixed and the divided main body portions 4A, 4B can be fixed and joined simply by tightening with a single support shaft 17 without requiring special tools or special skills. The assembly work of the entire on-off valve 1 can be simplified by using as few parts as possible, and the assembly accuracy can be improved, and the valve performance is further improved and the cost is reduced while stabilizing the quality. be able to.

  5 to 10 show a second embodiment of the on-off valve according to the present invention, FIG. 5 is a longitudinal side view of the assembled state, FIG. 6 is a longitudinal front view taken along line YY of FIG. -FIG. 10 is explanatory drawing of each component.

The on-off valve 1 ′ shown in the second embodiment includes a main body portion 4 </ b> A in which the valve main body 4 has a primary side inlet 2 and a central water passage 8 </ b> A, and a main body portion 4 </ b> B having a secondary side outlet 3 and a central water passage 8 </ b> B. The movable disk 6 is arranged around the axis a of the valve body 4 between a pair of fixed disks 5A and 5B which are divided in two and are arranged in parallel in the valve body 4 with an appropriate interval in the direction of water flow. The discs 5A, 5B, and 6 that are sandwiched and held rotatably are processed from ceramic such as Si ₂ O _3, for example, and have the same basic configuration as that of the first embodiment. In the configuration related to them, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and the configuration different from the first embodiment is mainly described. This will be described below.

  In this second embodiment, the pair of ceramic fixed disks 5A and 5B are formed in a disc shape as shown in FIGS. Two arcuate valve holes 12A and 12B are formed in the same circumferential portion near the outer periphery centering on the holes 11A and 11B, with an interval of 180 ° in the circumferential direction. Further, as shown in FIGS. 8A and 8B, the ceramic movable disk 6 is also formed in a disk shape having a smaller diameter than the fixed disks 5A and 5B, and a mounting penetration at the center thereof. Two arcuate valve holes are spaced 180 ° apart in the circumferential direction at the same circumferential portion near the outer periphery and having the same diameter as the valve holes 12A and 12B of the fixed disks 5A and 5B with the hole 14 as the center. 15 is formed.

  The large-diameter portions 4a2 and 4b2 of the two divided main body portions 4A and 4B are formed with disk-like wall portions 4a4 and 4b4 concentric with the central water passage holes 8A and 8B. As shown in FIG. 9, equidistantly spaced in the circumferential direction on the same circumferential portion near the outer circumference, which has the same diameter as the valve holes 12A, 12B, 15 of the disks 5A, 5B, 6 in the walls 4a4, 4b4. A plurality of water passage holes 11a, 11b having a diameter equal to the radial width of the valve holes 12A, 12B, 15 are formed.

  And one support shaft penetrated from the center part of the disk-shaped wall part 4a4 of one division | segmentation main-body part 4A to the through-holes 11A and 11B of a pair of said fixed disk 5A, 5B, and the through-hole 14 of the movable disk 6. FIG. The distal male screw portion 17a of 17 is screwed into a female screw formed at the center of the disc-shaped wall portion 4b4 of the other divided main body portion 4B, and is tightened, so that the opposing surfaces of the pair of fixed disks 5A and 5B and the movable disk 6 The discs 5A, 5B, and 6 are attached to the valve body 4 in a state where both surfaces are in close contact with each other, and the two divided body portions 4A and 4B are fixedly joined to each other.

  The opening / closing operation lever 7 for rotating the ceramic movable disk 6 is made of a separate material from the movable disk 6. That is, as shown in FIGS. 10A and 10B, the opening / closing operation lever 7 includes a small-diameter annular portion 7a for fitting and holding the disc-shaped movable disk 6 and the two divided main body portions 4A and 4B. A large-diameter annular portion 7b that fits outside the fixed joint portion and a lever portion 7c that protrudes outward are integrally formed from a resin such as ABS, and the small-diameter annular portion 7a includes the movable disk. A convex portion 7d is formed on the outer peripheral surface of the convex portion 6 so as to engage with the concave portion 6a (see FIG. 8) formed so that the movable disk 6 can rotate integrally.

  Further, between the notch recesses 5a, 5b formed in a part of the outer peripheral surface of the pair of disk-shaped fixed disks 5A, 5B and the inner peripheral surface of the large-diameter annular portion 7b of the opening / closing operation lever 7. Are provided with grooved pins 26 and 26 for reliably positioning and fixing the pair of fixed disks 5A and 5B.

  In the on-off valve 1 ′ of the second embodiment configured as described above, like the on-off valve 1 shown in the first embodiment, the ceramic surfaces excellent in surface smoothness, durability and wear resistance are Since the relative sliding surface is formed by the close contact with each other, the rotational resistance of the movable disk 6 can be reduced, the valve opening / closing operation can be performed smoothly and lightly, and the relative sliding surface is hardly worn or damaged. Even if the valve opening / closing operation is repeated, a high sealing performance that reliably prevents water leakage from the relative sliding surface is obtained, and a pair of fixed disks 5A and 5B that do not slide relative to each other and a fixed valve body 4 portion Since the sealing material for watertight sealing such as the O-rings 18A and 18B interposed between them is worn or damaged by the rotation of the movable disk 6, there is no possibility of water leakage or the like, so it is necessary to change the sealing material frequently. It is possible to maintain high sealing performance between the pair of fixed disks 5A and 5B and the valve body 4 part while simplifying maintenance and maintenance-free and reducing maintenance costs. Needless to say, the sealing performance and water stopping performance of the valve as a whole can be stably secured for long-term use.

  In addition, in the case of the on-off valve 1 ′ of the second embodiment, the arc-shaped valve holes 12 </ b> A and 12 </ b> B formed in the pair of fixed disks 5 </ b> A and 5 </ b> B and the movable disk 6 are formed when the valve is opened. Since the arc-shaped valve hole 15 and the valve body 4 are concentric with the axial center a of the valve body 4 and are in a valve-open state in which they are polymerized at equal intervals in the circumferential direction, it is possible to ensure a large amount of water flow. In addition, the inside of the valve body 4 can be made to pass water substantially evenly without any deviation.

  Further, since the ceramic movable disk 6 may be formed in a simple disk shape, the ceramic processing is facilitated, and both surfaces of the disk serving as the sliding surface can be finished to have better smoothness. The sealing performance of the moving surface can be further improved, and the cost can be reduced by reducing the amount of ceramic, which is an expensive material, as much as possible.

  In each of the above-described embodiments, the on-off valve of the present invention is connected to a branch port 23 of a faucet 22 such as a hot-water mixing faucet and a water guiding hose to water treatment equipment (not shown) such as a shower, a dishwasher, and a water purifier. Although the case where it is used as a branch plug by interposing between 25 is described, it can be used by interposing it in other uses, for example, a faucet such as a vanity and a sink, and an intermediate part of a water supply pipe, etc. Of course.

  It is a disassembled perspective view which shows 1st embodiment of the on-off valve which concerns on this invention.   It is a vertical side view of the assembled state of the on-off valve.   It is a vertical front view in the XX line of FIG. 2 of the same on-off valve.   It is a schematic perspective view which shows the usage example of an on-off valve same as the above.   It is a vertical side view of the assembly state which shows 2nd embodiment of the on-off valve which concerns on this invention.   It is a vertical front view in the YY line of FIG. 5 of the same on-off valve.   (A) and (b) are a front view and a cross-sectional view of a fixed disk in the same on-off valve.   (A) and (b) are a front view and a cross-sectional view of a movable disk in the same on-off valve.   It is a front view of the valve main body (divided main-body part) in an on-off valve same as the above.   (A) (b) is the front view and longitudinal cross-sectional view of the opening / closing operation lever in the same on-off valve.

Explanation of symbols

1, 1 'On-off valve 2 Primary side inlet 3 Secondary side outlet 4 Tubular valve bodies 4A, 4B Split body parts 5A, 5B Ceramic fixed disk 6 Ceramic movable disk 6a Recess 7 Opening / closing operation lever 7a Small diameter ring Part 7b Large-diameter annular part 7c Lever part 7d Convex parts 12A, 12B Valve hole 15 Valve hole 16 Parallel pin 17 Support shaft 17a Tip male screw part a Axis center

Claims (5)

  A tubular valve body having a primary side inlet and a secondary side outlet, and a parallel valve body spaced apart from each other in the direction of water flow in the valve body and fixed in a watertight seal to the valve body. A pair of ceramic fixed disks and a pair of fixed disks that are sandwiched and held between opposite surfaces of the pair of fixed disks, and supported rotatably around the axis of the valve body. A movable disk made of ceramic and an opening / closing operation lever for rotating the movable disk around the axis, and the pair of fixed disks by relative rotation of the fixed disk and the movable disk accompanying the rotation operation of the opening / closing operation lever. And the valve opening state in which the valve holes formed in the movable disk are superposed and the inflow port and the outflow port are communicated with each other, and the valve holes in the both disks are non-polymerized. Off valve, characterized in that the communication between the inlet and the outlet is switchably configured and closed is blocked.   The valve body is divided into two parts, a main body part having the primary side inlet and a main body part having a secondary side outlet, and the two fixed main body parts are opposed to each other through the pair of fixed disks. The pair of fixed disks are positioned by a plurality of pins spanned between the face parts, and are passed through the pair of fixed disks and the movable disk along the axial center part of the valve body from one divided body part side. 2. The on-off valve according to claim 1, wherein the two split main body portions are fixedly joined to each other by screwing a front male screw portion of one support shaft into a female screw on the other split main body portion side.   The on-off valve according to claim 1 or 2, wherein the on-off operating lever is formed integrally with the ceramic movable disk and protrudes outward from the valve body.   The valve main body is divided into a main body portion having the primary side inlet and a main body portion having a secondary side outlet, and the pair of fixed discs and movable discs are axial centers of the valve main body. A plurality of valves are formed in the same circumferential portion around the axis of the pair of fixed discs and movable discs at equal intervals in the circumferential direction. A hole is formed, and the front male screw portion of one support shaft that is passed through the pair of fixed disc and movable disc along the axial center portion of the valve main body from one divided main body side is the other divided main body. The on-off valve according to claim 1, wherein the two divided main body parts are fixedly joined to each other by being screwed into a female screw on the part side.   The opening / closing operation lever includes a small-diameter annular portion that fits and holds a disc-shaped movable disk, a large-diameter annular portion that fits outside the fixed joint portion of the two divided main body portions, and a lever portion that projects outward. And a convex portion that engages with a concave portion formed on the outer peripheral surface of the movable disc and allows the movable disc to rotate integrally with the small-diameter annular portion. The on-off valve according to claim 4, wherein the on-off valve is formed of a body and another material.

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