JP4892298B2 - Drain valve - Google Patents

Description

  The present invention is disposed in a suitable place of a drain pipe connected to a refrigerator-freezer, a commercial air conditioner or the like, and prevents insects or the like from entering from the downstream side to the upstream side of the drain pipe or odors. It relates to drain valves.

  Conventionally, for example, in an air conditioner, the generated drain is stored in a drain pan, and the drain pan is configured to be discharged to the outside through a drain pipe connected to the drain outlet. Since the drain pan and the outside air are in direct communication with each other, there is a problem that outside air, odor, etc. enter the room through the drainage pipe through the air conditioner.

For this reason, as described in Patent Document 1, for example, a drain valve is connected to an appropriate position of a drain pipe (drain hose) led out from the air conditioner to the outside of the room, and ventilation with outside air is blocked by the drain valve, It is configured to prevent odors from the outside from entering the indoor side through the drain pipe. Specifically, the structure of this drain valve is such that the central part of the valve body having upper and lower ends formed as connection ports is formed in a valve chamber having a larger diameter than these connection ports, and the upper end of the lower connection port. Is formed in the valve seat of a hollow spherical valve body that protrudes into the lower end portion of the valve chamber and the protruding end portion is movably mounted in the valve chamber, and the upper and lower connection ports are connected to the upstream drain pipe. When connected to the downstream drainage pipes, the ventilation is blocked by the hollow spherical valve seated on the valve seat, while the drainage from the upstream drainage pipe stays in the valve chamber. The hollow spherical valve body is lifted by buoyancy, separated from the valve seat, and discharged to the downstream drain pipe.
JP-A-8-5093

  However, according to the drain valve as described above, in a state where the hollow spherical valve body is seated, it is possible to block the outside air from the downstream side from flowing backward to the upstream side, but insects and the like from the downstream side When the water enters, there is a possibility that the hollow spherical valve body is pushed up and enters the upstream side through the drain valve. Further, when a negative pressure is generated by the operation of a ventilating fan or the like in an airtight room, an intake force acts on the valve chamber of the drain valve through the drain pipe, and the hollow spherical valve body is lifted by the intake force to There was a problem that odors and the like flow back into the room. Further, when dust or foreign matter accumulates or becomes clogged in the valve chamber, it is necessary to perform a complicated operation such as removing the entire drain valve from the drain pipe and removing and cleaning it.

  Further, since this drain valve is a vertical valve having an inlet at the upper end and an outlet at the lower end, it is led out from the home air conditioner to the outdoor side as described above, and is vertical along the outer wall. The drain hose installed in the floor can be connected to the lower end of the drain hose, etc., but it can be used in a space under the floor, such as a large refrigerator-freezer or commercial air conditioner. It cannot be used for a relatively large-diameter drain pipe that is installed horizontally along the pipe. To prevent backflow of odors and the like to such a drain pipe, a U-shaped trap should be installed at the appropriate place of the drain pipe. The U-shaped trap is used in the case where dredging or the like enters from the downstream side of the drain pipe, even if the backflow of odor can be prevented with such a structure. If there is a risk of entering the upstream side easily through the inside To, there has been a problem that it is extremely difficult to arrange such a U-shaped trap in a narrow space as low as floor or the like.

  The present invention has been made in view of such problems, and the object of the present invention is to simply connect to an appropriate place of a drain pipe arranged horizontally even in a narrow space such as under the floor. It enables smooth drainage and can reliably prevent insects and insects from entering the upstream side from the downstream side of the drainage pipe and odors from entering the upstream side. In addition, the valve can be removed without removing it from the drainage pipe. The purpose is to provide a drain valve that can easily clean the body and the inside.

In order to achieve the above object, a drainage valve according to the present invention is a drainage valve connected to an intermediate part of a drainage pipe as described in claim 1, wherein the upstream and downstream sides of the drainage pipe are provided at both front and rear ends of the valve body. An inlet and an outlet connected to each side are provided, and a central portion of the valve body is formed in a valve chamber communicating with the inlet and the outlet. A spherical valve body having a large diameter and smaller specific gravity than water is mounted so as to be movable up and down , and the spherical valve body can be received upward from the upper periphery of the valve chamber and from the lower end to the upper end. A short cylinder portion that is inclined obliquely rearward toward the downstream side as it goes is projected so that the lower end opening of the short cylinder portion communicates with the valve chamber, and further, the upper end opening of the short cylinder portion is connected. The lid member is detachably mounted and the inner wall surfaces on both sides of the valve chamber facing each other are spherical. Both sides of the body are formed as guide surfaces that slide in the vertical direction, and in the state where the spherical valve body is located at the lower end of the guide surface by its own weight, the inlet is closed at the front surface of the spherical valve body. ing.

  In the drain valve configured as described above, the invention according to claim 2 is configured such that the inner diameter of the short cylinder portion is equal to the outer diameter of the spherical valve body and the inner circumferential surface thereof is formed on the sliding contact guide surface of the spherical valve body. In addition, guide grooves that are inclined obliquely forward toward the lower end are formed on the inner wall surfaces of both sides of the valve chamber that continues downward from the lower ends of both side portions of the sliding contact guide surface, and both sides of the spherical valve body are formed by these both side guide grooves. A guide surface for guiding the surface is formed.

On the other hand, in the invention according to claim 3 , the inner diameter of the short cylinder portion is formed larger than the outer diameter of the spherical valve body, and from the upper end of the inner wall surface of the rear portion on the inner peripheral surface, Straight ridges that project diagonally forward as the both side surfaces of the rear part of the spherical valve body are directed downward toward the lower part of the wall surface and project in parallel to each other, and at the lower part of the inner wall surfaces on both sides of the valve body In the state where the inclined ridge portion inclined obliquely downward from the lower end of the ridge portion is projected and the spherical valve body reaches the lower end portion of the both inclined ridge portions, the inclined ridge portion The front surface of the spherical valve body is pressed against the opening end of the inflow port by inclination, and the opening end is closed.

  According to the first aspect of the present invention, the inlet and outlet are respectively connected to the upstream and downstream sides of the drain pipe at the front and rear ends of the valve body, and the central part of the valve body is connected to these inlets. The valve chamber is formed in a valve chamber communicating with the outlet, and a spherical valve body for closing the inlet is opened and closed in the valve chamber so as to be movable up and down, and the spherical shape is upward from the upper periphery of the valve chamber. Since the drainage valve structure with a short cylindrical part that can accept the valve body is constructed, the overall shape is compact, suitable for mass production, and can be provided at low cost, of course, at the front and rear ends of the valve body As a horizontal drain valve with an inlet and an outlet, this drain valve can be used simply by connecting it to the appropriate place of a drain pipe that is piped horizontally through a narrow space under the floor from a refrigerator / freezer. it can.

  In addition, the spherical valve body is formed to have a larger diameter than the inflow and outflow ports, and the inner wall surfaces on both sides of the valve body facing the valve chamber are slid vertically on both side surfaces of the spherical valve body. In the state where the spherical valve body is formed at the lower end of the guide surface by its own weight, the inflow port is closed at the front surface of the spherical valve body. In a state where drainage or the like is not drained, the spherical valve body is held in a state where the back and forth movements are suppressed by the guide surface, and the opening end of the inflow port is securely closed at the front surface. Furthermore, since the specific gravity of the spherical valve body is smaller than that of water, when drainage or the like is drained from the upstream side of the drain pipe, the spherical valve body is placed on the guide surface by the flow pressure of the drainage. Easy to ascend while retreating along One surely open to drain the inlet to flow into the valve chamber, it is possible to smoothly flow out from the valve chamber to the outlet.

  At this time, according to the amount of drainage, the spherical valve body is raised along the guide surface toward the inside of the short cylindrical portion to enable reliable drainage, and when drainage stops, the spherical valve body follows the guide surface. Therefore, it can be accurately moved downward to keep the inlet closed. In this state, it is possible to prevent odors and the like from flowing backward from the outlet side to the upstream side, and even if insects or moths enter from the downstream side of the drain pipe, the intrusion direction is the back of the spherical valve body. Therefore, it is possible to reliably prevent the spherical valve body from entering the upstream side while maintaining the closed state.

  In addition, even if negative pressure is generated by the operation of a ventilation fan or an air conditioner fan, and the suction force is generated on the upstream side of the drain pipe by this negative pressure, the suction force causes the spherical valve body to be more firmly pressed against the inlet. Therefore, it is possible to reliably eliminate the possibility of outside air and odors entering the room. In addition, the lower end portion of the short cylindrical portion that receives the spherical valve element is communicated with the upper end of the valve chamber, and a lid member is detachably attached to the upper end opening of the short cylindrical portion. When dust or foreign matter accumulates or becomes clogged, the spherical valve body can be easily taken out using the adhesive tape etc. through the short cylinder part by removing the lid member without removing this drain valve from the drain pipe. Can do.

  Accordingly, dust and foreign matters in the valve chamber can be easily removed through the opened short tube portion, and the valve chamber can be easily and reliably cleaned every corner, and in addition, it adheres to the spherical valve body. Dust and the like can be removed cleanly by washing with water. Further, after cleaning, the guide surface is provided with both side surfaces of the spherical valve body on the opposite inner wall surfaces of the valve chamber simply by putting the spherical valve body into the valve chamber through the upper end opening of the short cylinder portion. Can be automatically engaged, and can be easily restored to a use state in which the inflow port is closed on the front surface by moving down along the guide surface.

Furthermore, according to the present invention, the height of the entire drainage valve is increased because the short cylindrical portion protruding from the upper end of the valve chamber is inclined rearward toward the downstream side from the lower end to the upper end. Even with drainage pipes that can be lowered and horizontally piped in a narrow space under the floor from a refrigerator or the like, connect this drainage valve to the appropriate place of the drainage pipe in an easily intervening state. In addition, the lower end opening of the short cylindrical portion communicating with the valve chamber is formed in an elliptical shape that is long in the front-rear direction, and the rear side of the spherical valve body closing the inlet and the lower end opening of the short cylindrical portion A gap can be provided between the rear peripheral portion of the valve portion and the valve opening operation of the spherical valve body can be reliably and smoothly performed. Can be easily taken out and cleaning work can be done easily

According to the second aspect of the present invention, the inner diameter of the short cylindrical portion is made equal to the outer diameter of the spherical valve body, and the inner peripheral surface thereof is formed on the sliding contact guide surface of the spherical valve body, and this sliding contact guide A guide groove that is inclined obliquely forward as it goes to the lower end on both side inner wall surfaces of the valve chamber that continues downward from the lower end of both sides of the surface, and guide surfaces that guide both side surfaces of the spherical valve body by these both side guide grooves When the spherical valve body is opened and closed, the spherical valve body slides on both sides of the sliding contact guide surface and the sliding contact guide surface without causing the spherical valve body to move back and forth and right and left. The opening / closing operation can be smoothly performed while accurately moving up and down along the guide groove.

According to the third aspect of the present invention, the inner diameter of the short cylindrical portion is formed larger than the outer diameter of the spherical valve body, and from the upper end of the inner wall surface of the rear portion on the inner peripheral surface to the inner sides of the valve chamber. Straight ridges that project diagonally forward as the both side surfaces of the rear part of the spherical valve body are directed downward toward the lower part of the wall surface and project in parallel to each other, and at the lower part of the inner wall surfaces on both sides of the valve body Inclined ridges that are inclined obliquely downward from the lower end of the ridge to the front, so the spherical valve body can be opened and closed accurately using these straight ridges and inclined ridges as guide surfaces. In a state where the spherical valve body reaches the lower end of the inclined ridge portion and closes the inlet, the spherical valve body is forced to inflow by the inclination of the inclined ridge portion. It is pushed to the side and the valve closed state can be reliably maintained.

  Next, specific embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal side view of a drain valve, FIG. 2 is a cross-sectional view taken along line AA, FIG. 3 is a side view thereof, and FIG. Is an exploded perspective view, wherein the valve body 1 is made of a transparent or translucent hard synthetic resin, the central part is formed in a horizontal cylindrical valve chamber 2 having a certain length, and the length of the valve chamber 2 is On the other hand, a cylindrical inflow port 3 having a predetermined length is projected and formed in the front end opening 2a at the front and rear end openings, and the front and rear end openings are formed in a circular shape in the longitudinal direction. A cylindrical outlet 4 having the same fixed length toward the rear and having the same inner and outer diameter as the inner and outer diameter of the inlet 3 is projected and formed in the rear end opening 2 b of the valve chamber 2. The inflow end of the inflow port 3 is communicated with the front end opening 2a and the outflow start end of the outflow port 4 is communicated with the rear end opening 2b. It is caused. In addition, the one end side of the length direction of the valve chamber 2 is made into the front end, and the other end side is made into the rear end.

  The valve chamber 2 and the inflow and outflow ports 3 and 4 are formed in a single straight pipe shape with their centers coincided with each other on the same horizontal axis, and the front end opening inner peripheral surface of the inflow port 3 The inner peripheral surface of the rear end opening of the outlet 4 is formed in each of large-diameter connection ports 3a and 4a for connecting the upstream pipe end and the downstream pipe end of the drain pipe 11 (shown in FIG. 5). Yes. In addition, you may form these connection port parts 3a and 4a with the outer peripheral surface of the inflow port 3 and the outflow port 4, respectively. Further, a short cylindrical portion 5 capable of receiving a spherical valve body 6 having a specific gravity smaller than that of water, which will be described later, protrudes upward from the upper peripheral portion of the valve chamber 2 so that a lower end opening 5a of the short cylindrical portion 5 is formed. The valve chamber 2 is communicated.

The short cylindrical portion 5 is inclined obliquely rearward toward the downstream side from the lower end thereof, that is, from the upper peripheral portion of the valve chamber 2 to the upper end opening 5b. Therefore, the lower end opening 5a of the short cylinder part 5 is formed in an elliptical shape in plan view obtained by obliquely cutting the short cylinder part 5, and the valve chamber 2 communicating with the lower end opening 5a of the short cylinder part 5 is formed. The upper peripheral part is also formed in an opening 2c having an elliptical shape in plan view having the same size as the opening 5a, and the periphery of the lower end of the opening of the short tube part 5 is connected to the periphery of the opening 2c.

  The upper half of the valve chamber 2 has its two side walls except for the front and rear openings 2a and 2b so as to be flush with the circumferential walls of the short cylinder 5 in a convex arc shape. The opposite inner wall surfaces of both sides are formed by forming them in parallel with each other by bulging in a convex arc shape with the same radius as that of the short tube portion 5 from the front and rear portions in the length direction toward the center portion. It is formed in guide grooves 7, 7 curved in a concave arc shape in the length direction of the chamber 2. An outer diameter flows into the guide grooves 7, 7, and a spherical valve having a larger diameter than the inner diameters of the outlets 3, 4 The spherical valve body 6 is disposed in the valve chamber 2 with both side surfaces of the body 6 engaged in a slidable manner.

  Further, the short cylinder portion 5 is formed so that its inner diameter is equal to the outer diameter of the spherical valve body 6 or slightly larger than the outer diameter of the spherical valve body 6, and the inner peripheral surface thereof is the spherical valve body 6. The lower ends of both side portions of the sliding contact guide surface 5c which are formed on the sliding contact guide surface 5c and which face each other in the diametrical direction are the upper ends of both side guide grooves 7 and 7 provided on the inner wall surfaces on both sides of the valve chamber 2. Each is continuous in a flat shape. Therefore, the guide surfaces curved in an arc shape in the length direction of the valve chamber 2 in the both side guide grooves 7 and 7 that make sliding contact with the outer peripheral surface portions on both sides of the spherical valve body 6 are concave with the same radius of curvature as the sliding contact guide surface 5c. While being formed in an arcuate surface, the opposing guide surfaces on both sides face each other from the lower end of both sides of the sliding contact guide surface 5c from the upper end of the valve chamber 2 with an interval substantially equal to the diameter of the spherical valve body 6. The valve chamber 2 is provided up to the middle of the height.

  On the other hand, the lower half portion of the central circumferential wall portion in the length direction of the valve chamber 2 is formed as a half circumferential groove portion 8 that circulates the lower half portion of the valve chamber 2 downward from the lower ends of the both side guide grooves 7, 7. The lower end groove portion of the semicircular groove portion 8 provided on the inner bottom surface of the valve chamber 2 is formed in the seating portion 8 a at the lower end portion of the spherical valve body 6. The inner surface of the semicircular groove portion 8 is formed in a concave arc shape in cross section with the same radius of curvature as the outer diameter of the spherical valve body 6, and the rear end of the semicircular groove portion 8 from the rear end edge of the both side guide grooves 7, 7. The edges are formed on the inclined rear end edges 9 and 9 inclined obliquely forward toward the lower side, and the both rear ends of the spherical valve body 6 are slidably engaged with the inclined rear end edges 9 and 9, When the spherical valve body 6 moves down along the guide grooves 7 and 7 in the valve chamber 2 from the short cylindrical portion 5 side, the spherical valve body 6 is lowered by the inclined rear end edges 9 and 9 on both sides. When the spherical valve body 6 is forcibly urged in the direction of moving forward as it moves, the front surface of the spherical valve body 6 is connected to the lower end of the front peripheral wall surface of the short cylindrical portion 7. The inlet 3 is closed in close contact with the inflow end opening edge.

  In this state, the center of the spherical valve body 6 is positioned slightly above the center of the valve chamber 2, and both sides thereof are engaged with the inclined rear end edges 9, 9. Therefore, the downward force due to the dead weight of the spherical valve body 6 is biased to move the spherical valve body 6 forward by these two inclined rear end edges 9 and 9 which are inclined obliquely forward toward the lower end. Thus, the front surface of the spherical valve body 6 is positively pressed against the open end of the inlet 3 to close the inlet 3. A lid member 10 made of the same resin as that of the valve body 1 is detachably attached to the upper end opening of the short cylinder portion 5. In addition, as the spherical valve body 6 having a specific gravity smaller than that of water, a thin hollow spherical valve body made of a synthetic resin whose inside is sealed or a spherical valve body made of a foamed synthetic resin can be used.

As shown in FIG. 5, the drain valve configured in this way is interposed in a suitable place of a drain pipe 11 that is horizontally arranged for discharging drain from the refrigerator refrigerator or the commercial air conditioner 12 or the like. It is used in a connected state. Specifically, with the short cylindrical portion 5 of the valve body 1 facing upward and the seating portion 8a facing downward, the inlet 3 is connected to the upstream drain pipe, and the outlet 4 is connected to the downstream drain pipe. Keep connected. At this time, the drainage valve is a horizontal drainage valve that is integrally provided at the upper end of the valve body 1 with the short cylindrical portion 5 inclined obliquely rearward to make the height as low as possible. Even so, it can be easily installed and constructed.

  In this piping state, when drainage or the like is not drained from the upstream side, the spherical valve body 6 disposed in the valve chamber 2 is seated on the seating portion 8a, and the valve chamber is in front of the valve chamber 6 The inflow terminal portion of the inflow port 3 communicating with the front end opening 2a is closed. Therefore, outside air and odors are prevented from entering the upstream drainage pipe from the downstream drainage pipe, and even if insects or moths enter the valve chamber 2 through the downstream drainage pipe, Since the direction is the back side of the spherical valve body 6, there is no fear that the spherical valve body 6 will be pushed open, and it is possible to reliably prevent the upstream drain pipe from entering while maintaining the closed state. Further, even if negative pressure is generated on the upstream side of the drainage pipe 11 due to the operation of an indoor ventilation fan, an air conditioner fan, etc. and an intake force is generated in the pipe, the intake force causes the spherical valve body 6 to enter the inlet 3. Therefore, the possibility of outside air or the like entering the indoor side through the downstream drainage pipe can be reliably eliminated by the intake force.

  Next, when drained from a refrigerator-freezer, a commercial air conditioner or the like, when the drainage reaches the inlet 3 of the valve body 1 through the drainpipe 11, the specific gravity of the spherical valve body 6 closing the inlet 3 is reached. 6 is lighter than water, and the spherical valve body 6 floats obliquely upward toward the rear while being guided by the drainage from both sides of the lower circumferential groove portion 8 to the both side guide grooves 7 and 7, and flows as shown in FIG. The lower end of the inlet 3 is opened to allow drainage to flow into the valve chamber 2, flow through the valve chamber 2, and discharge to the downstream side of the drainage pipe 11. When the amount of drainage increases, the water surface rises, and the spherical valve body 6 moves upward and obliquely rearward along the guide grooves 7 and 7 while being lifted in response to the rise, and is received in the short tube portion 5. The inflow port 3 is greatly opened to enable smooth drainage.

  When the drainage stops, the spherical valve body 6 moves downward with the sliding contact guide surface 5c formed by the inner peripheral surface of the short cylindrical portion 5 as a guide, and from both sides of the valve chamber 2 from this sliding contact guide surface 5c. As the both side surfaces of the spherical valve element 6 are moved down while being guided by the guide grooves 7 and 7 provided in the inner wall surface, they are pushed forward obliquely by the inclined rear end edges 9 and 9 at the lower half portion thereof. When the semicircular portion extending from both side surfaces to the lower peripheral surface is fitted into the lower peripheral groove portion 8 provided on the inner peripheral surface of the lower half of the valve chamber 2 and seated in the seating portion 8a, the spherical valve body 6 is moved to the front surface thereof. Thus, the opening edge of the inlet 3 that opens toward the valve chamber 2 is closed. In this state, the spherical valve body 6 is pressed forward by the inclined rear end edges 9, 9 of the lower peripheral groove portion 8, and the front surface thereof is positively pressed and closed to the opening end edge of the inflow port 3. To do.

  Further, since the valve body 1 is made of a transparent or translucent synthetic resin, the inside of the valve body 1 can be seen through from the outside, and the state inside the valve body 1 can be confirmed without removing the lid member 10. be able to. If the valve chamber 2 of the valve body 1 is contaminated by dust or foreign matter mixed in the drain or the like during long-term use, or if dust or the like adheres to the valve body 2, smooth operation cannot be performed. When the lid member 10 that closes the upper end opening 5b of the short tube portion 5 is removed without removing 1 from the drain pipe 11, the spherical valve body 6 in the valve chamber 2 is opened through the opening 5b. Since the upper peripheral part is exposed, the adhesive tape piece is inserted through the opening 5b, the tip part is attached to the upper peripheral part of the spherical valve element 6, and the adhesive tape piece is pulled back to return the spherical valve element. 6 can be easily taken out from the valve chamber 2 through the short cylinder portion 5.

  In this way, the valve chamber 2 of the valve body 1 emptied by the removal of the spherical valve body 6, the inflow, the outlets 3, 4, and the inside of the short cylinder portion 5 are cleaned by washing or the like, and the spherical valve body 6 taken out is also its outer periphery After removing dust adhering to the surface and cleaning it cleanly, this spherical valve body 6 is inserted from the upper end opening 5b of the short cylinder part 5 and disposed in the valve chamber 2, and the short cylinder part 5 By performing the operation of closing the upper end opening 5b with the lid member 10, the drain valve can be easily assembled. At this time, when the spherical valve body 6 is introduced from the upper end opening 5 b of the short cylinder portion 5, the spherical valve body 6 travels along the sliding contact guide surface 5 c formed by the inner peripheral surface of the short cylinder portion 5. 2 is automatically fitted into the lower peripheral groove portions 8 and 8 provided on the inner peripheral surface of the lower half of the valve chamber 2 while being guided by the guide grooves 7 and 7 provided on the inner wall surfaces of both sides, and the lower surface thereof is the seating portion. While sitting on 8a, the inflow opening end of the inflow port 3 is closed by the front surface thereof.

  In the above embodiment, the inner diameter of the short cylindrical portion 5 is made equal to the outer diameter of the spherical valve body 6 and the inner peripheral surface thereof is formed on the sliding contact guide surface 5c of the spherical valve body 6, and the valve Guide grooves 7 and 7 are formed on both opposing wall surfaces of the chamber 2 so as to be connected to both side portions of the sliding contact guide surface 5c. As shown in FIGS. A spherical valve body 6 is formed in the short cylinder portion 5 ′ from the upper end of the short cylinder portion 5 ′ to the lower portions of the inner wall surfaces on both sides of the valve chamber 2 ′. The guide protrusions 20 and 21 to be guided may be protruded.

  Specifically, the lower half of the valve chamber 2 'of this drain valve is a semi-cylinder having an inner diameter equal to the inner diameter of the short cylindrical portion 5' formed larger than the outer diameter of the spherical valve body 6. The valve chamber 2 ′ is formed in a shape, and the valve chamber 2 ′ is formed in a circular shape in the cross section of the valve chamber 2 ′. Each of the cylindrical inflow and inflow ports 3 and 4 protrudes in the front-rear direction to constitute a valve body 1 '. The short cylinder portion 5 ′ is integrally provided in the valve chamber 2 ′ in a state inclined obliquely rearward as it goes upward in a state where the lower end opening portion thereof is in full communication with the upper peripheral portion of the valve chamber 2 ′. A constant height for guiding the both side surfaces of the rear part of the spherical valve body 6 in an engaged state from the upper end of the inner wall surfaces of the rear part on the inner peripheral surface of the short cylindrical part 5 'to the lower part of the inner wall surfaces of the valve chamber 2'. The straight ridges 20 and 20 having the protrusions project in parallel with each other.

  These straight ridges 20 and 20 on both sides are inclined obliquely forward from the upper end to the lower end at the same inclination angle as the short cylindrical portion 5 ′, and are opposed to each other in the lower half of the valve chamber 2 ′. On both side inner wall surfaces, inclined ridges 21 and 21 are provided so as to incline further obliquely forward from the lower ends of both side straight ridges 20 and 20 downward. The inclined ridges 21 and 21 are provided in parallel with each other toward the lower side with the upper ends thereof being continuous with the lower ends of the straight straight ridges 20 and 20 on both sides. You may provide so that the space | interval between both inclined protrusion parts 21 and 21 may become narrow or may expand toward a lower end, in short, the lower peripheral part of the both sides | surfaces of the spherical valve body 6 is this When the spherical valve element 6 is guided on the inclined protrusions 21 and 21 and reaches the lower end of the inclined protrusion parts 21 and 21, the front surface of the spherical valve element 6 closes the opening end of the inlet 3. What is necessary is just to comprise. Since other structures such as the upper end opening of the short cylinder portion 5 'being opened and closed by the lid member 10 are the same as those of the embodiment shown in FIGS. The same reference numerals are assigned and detailed description is omitted.

With this configuration, when drainage or the like is not drained into the drain pipe 11 from a refrigerator, a commercial air conditioner, or the like, it communicates with the front end opening 2a of the valve chamber 2 through the front surface of the spherical valve body 6. The inflow end portion of the inflow port 3 is closed. Next, when drainage or the like is drained, when the drainage reaches the inlet 3 of the valve body 1 through the drain pipe 11, the specific gravity of the spherical valve body 6 that closes the inlet 3 is higher than that of water. Because it is light, the spherical valve body 6 floats by receding obliquely upward while the spherical valve body 6 is in contact with the inclined ridges 21 and 21 on both side surfaces on both sides, and opens the inlet 3 to drain the water. Is discharged to the downstream side of the drain pipe 11 through the valve chamber 2. When the amount of drainage increases, the spherical valve body 6 rises as the water level rises, and the spherical valve body 6 is received in the short cylindrical portion 5 ′. At this time, than has a larger diameter than the outer diameter inner diameter of the spherical valve body 6 of the short cylindrical part 5 'which is inclined obliquely rearward toward the upper end, the spherical valve body 6 on both sides straight butt It floats away from the strips 20 and 20 while being in sliding contact with the front inclined inner peripheral surface of the short cylindrical portion 5 ′.

  When drainage stops, the spherical valve body 6 descends, and the rear lower portions of both side surfaces thereof are engaged with the straight ridges 20 and 20 on both sides so that these both ridges are straight. 20, 20 reaches the inclined ridges 21, 21, and moves diagonally forward as the inclined ridges 21, 21 are moved down, opening the front face toward the valve chamber 2. The inlet 3 is brought into close contact with the opening edge of the inlet 3, and the inlet 3 is closed. In this state, the spherical valve body 6 is maintained in a state where it is pressed forward by the inclined ridges 21, 21, and its front surface is positively pressed and closed to the opening edge of the inlet 3.

  When the valve chamber 2 of the valve body 1 'is contaminated by dust or foreign matter mixed in the drain during long-term use or when dust or the like adheres to the valve body 1', the smooth operation cannot be performed. In the same manner as in the above embodiment, the lid member 10 that closes the upper end opening 5b of the short cylindrical part 5 ′ is removed without removing the valve body 1 ′ from the drain pipe 11, and the opening Take out the spherical valve body 6 from the valve chamber 2 ′ using an adhesive tape piece or the like through 5b and in the valve chamber 2 ′ of the evacuated valve body 1 ′, inflow, outflow ports 3 and 4, short tube portion 5 ′ The spherical valve body 6 removed from the outer peripheral surface of the spherical valve body 6 after being cleaned by washing with water is cleaned cleanly, and then the spherical valve body 6 is removed from the upper end opening 5b of the short cylindrical portion 5 '. It is put in and placed in the valve chamber 2.

  At this time, when the spherical valve body 6 is put into the short cylinder portion 5 ′, the rear lower portions of both side surfaces thereof are supported on the both-side straight protrusions 20 and 20, and the front side of the spherical valve body 6 and the short cylinder are supported. It moves down along these straight ridges 20 and 20 with a certain gap between the front inner peripheral surface of the part 5 ′, and the inclined ridges from the lower ends of the straight ridges 20 and 20 It slides on the ridges 21 and 21 and is moved to the inlet 3 side by these inclined ridges 21 and 21 to automatically close the open end of the inlet 3 and used as a drain valve again. Enable. In addition, the drain valve of this invention can also be connected and used for the drain pipe laid in the floor under the high-rise building and the drain pipe of a kitchen.

The vertical side view of this invention drain valve. The cross-sectional view in the AA line. The side view. FIG. The simple vertical side view which shows a use condition. The vertical side view of the state which the inflow port opened. The vertical side view which shows another embodiment of this invention drain valve. The simplified perspective view. FIG. 8 is a cross-sectional view taken along line BB in FIG. 7.

DESCRIPTION OF SYMBOLS 1 Valve body 2 Valve chamber 3 Inlet 4 Outlet 5 Short cylinder part 6 Spherical valve body 7 Guide groove
10 Lid member
11 Drain pipe

Claims (3)

A drainage valve connected to the middle part of the drainage pipe, which has an inlet and an outlet connected to the upstream and downstream sides of the drainage pipe at the front and rear ends of the valve body, respectively, and the central part of the valve body The valve chamber is formed in a valve chamber communicating with the inflow and outflow ports, and a spherical valve body having a diameter larger than the inner diameter of the inflow and outflow ports and smaller in specific gravity than water is provided in the valve chamber so as to be movable up and down. In addition , a short cylindrical portion that can receive the spherical valve body upward from the upper peripheral portion of the valve chamber and is inclined obliquely rearward toward the downstream side from the lower end to the upper end is provided to project. The lower cylinder opening is communicated with the valve chamber, and a lid member is detachably attached to the upper cylinder opening of the short cylinder, and the inner wall surfaces facing the valve chamber are spherical. Spherical valve body is self-weighted by forming both sides of the valve body as guide surfaces that slide in the vertical direction Drain valve, characterized in that it is configured to close the inlet in front of the spherical valve body in a state located at the lower end portion of the Ri guide surface. The inner diameter of the short cylindrical portion is made equal to the outer diameter of the spherical valve body, and the inner peripheral surface thereof is formed on the sliding contact guide surface of the spherical valve body, and the valve continues downward from the lower ends of both sides of the sliding contact guide surface. claims, characterized in that forming a guide surface for guiding both sides of the spherical valve member by these sides guide grooves to form an inclined guide groove obliquely forward toward the lower end on both sides in the wall of the chamber The drain valve according to 1 . The inner surface of the short cylinder part is formed to be larger than the outer diameter of the spherical valve body, and both the rear side surfaces of the spherical valve body extend from the upper end of the inner wall surface of the rear part to the lower part of the inner wall surface of the valve chamber on the inner peripheral surface. The straight ridges that project diagonally forward as they go downwards are projected in parallel with each other and at the bottom of the inner wall surfaces on both sides of the valve body, diagonally downward from the lower ends of the straight ridges on both sides. In the state where the inclined ridge portion is inclined and the spherical valve body reaches the lower end of the inclined ridge portion on both sides, the front surface of the spherical valve body is made to flow in the inlet by the inclination of the inclined ridge portion. The drainage valve according to claim 1, wherein the opening end is closed by being pressed against the opening end.

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