JP5042089B2 - Air valve for water pipe - Google Patents

Description

  The present invention relates to a water pipe air valve, and more particularly, to a water pipe air valve that discharges air mixed in the water pipe or introduces air into the water pipe when water in the water pipe is discharged.

An example of a conventional air valve of this type is disclosed in Patent Document 1. The air valve of Patent Document 1 is a valve box, a lid attached to the opening of the valve box, a cover attached to the lid, a bottomed guide cylinder disposed in the valve box, and slidable in the guide cylinder Provided in the guide cylinder and a float valve body provided in the guide cylinder and closing the small-diameter air hole at its upper limit position. Then, by providing a holding portion (protrusion) at the lower part of the inner surface of the guide cylinder, a gap is provided between the guide cylinder and the float valve body so that foreign matter does not accumulate there.
JP 2003977751 [F16K 24/00]

  However, the air valve of Patent Document 1 has a structure in which water is filled around the operating parts such as the floating valve body and the float valve body, and the guide tube and the floating valve body have holes for passing water. The shape of the ridge is complicated by the provision of ridges. For this reason, when the air valve of Patent Document 1 is used for piping such as agricultural water containing a large amount of foreign matter such as dust and soil particles such as fallen leaves and straw, foreign matter contained in the water is applied to the operating part and the guide cylinder. There is a problem that it is easy to adhere and clog, and the operation part is liable to malfunction.

  Further, in the air valve of Patent Document 1, since the operating part enters the valve box, it is difficult to inspect and clean the operating part from the outside, and to remove foreign matters that cause malfunction of the operating part. For this, it is necessary to disassemble and clean the inside of the valve box by opening the cover and the lid. Furthermore, since the cover and the lid are fastened with bolts to the valve box, when disassembling and cleaning the inside of the valve box, it is necessary to remove a plurality of bolts, and it takes time and effort to disassemble the cover. Tools such as a wrench are also required. In other words, the technique of Patent Document 1 requires time and effort for maintenance.

  Therefore, a main object of the present invention is to provide a novel air valve for a water pipe.

  Another object of the present invention is to provide an air valve for a water pipe that is not easily clogged with foreign matters such as dust and is easy to maintain.

  The present invention employs the following configuration in order to solve the above problems. Note that reference numerals in parentheses and supplementary explanations indicate correspondence with embodiments described later in order to help understanding of the present invention, and do not limit the present invention.

1st invention is the air valve for water pipes attached to a water pipe, Comprising: The 1st opening part which is provided in a valve lid connected to a water pipe, and connects the upper direction and the downward direction of a valve lid, 1st A first sliding body that has a second opening that is slidably provided in one opening and communicates with the upper and lower sides of the first sliding body. The second sliding body, the second sliding body provided to be slidable in the first opening , the second opening , and the first sliding body that keeps the upper portion of the first sliding body protruding from the upper surface of the valve lid. A float provided at the lower part of the moving body, a first air passage formed outside the second opening and communicating the upper and lower sides of the valve lid, and formed above the second opening and communicating the upper and lower sides of the valve lid A first air passage that is provided on the first sliding body and abuts against a lower surface of the valve lid to block communication of the first air passage. Body, and in contact with the lower surface of the first sliding body is provided on the float those comprising a second valve body to block the communication of the second air passage, a water supply pipe air valve.

In the first invention, the water valve for the water pipe (10) includes the valve lid (12), and discharges air mixed in the water pipe (100) or discharges water in the water pipe. Or introduce air into the. The valve lid includes, for example, a guide part (22) having a first opening (24), and the first sliding body (30) is slidably provided in the first opening. The 1st sliding body is provided with the 1st latching | locking part (46) which protrudes from the outer surface upper part. This 1st latching | locking part prevents the falling off from the valve lid of a 1st sliding body, and maintains the state which the upper part of the 1st sliding body always protruded from the upper surface of the valve lid. The second sliding body (48) is slidably provided in the second opening (34) formed in the first sliding body. A first valve body (40) is provided below the first sliding body. The first valve body abuts the lower surface of the valve lid, for example, the lower surface of the zenith portion (16) or the guide portion (22), at the upper limit position of the first sliding body, and above and below the valve lid (that is, the water pipe) The first air passage (70) communicating between the inside and the outside is blocked. Further, a float (64) is provided at the lower part of the second sliding body, and a second valve body (56) is provided on the float. The second valve body is in contact with the lower surface of the first sliding body at the upper limit position of the second sliding body, and blocks the second air passage (72) that communicates the upper and lower sides of the valve lid.

  According to the first invention, the first sliding body is slid into the first opening formed in the valve lid, and the second sliding body is slid into the second opening formed in the first sliding body. Therefore, the sliding portions (in the embodiment, the first shaft portion and the second shaft portion) of the first sliding body and the second sliding body are not immersed in water, and foreign matter is less likely to enter the sliding portion. Moreover, since the shape of the part immersed in water does not become complicated, it is hard to clog a foreign material. In addition, with such a configuration, each air passage can be formed in a straight line, so it is possible to make a simpler configuration, even if water has entered each air passage and foreign matter has entered. , Foreign objects are easily washed away. Therefore, foreign matters such as dust are not easily clogged, and maintenance is easy.

A second invention is dependent on the first invention, and the valve lid is connected to the water supply pipe through a vertical pipe, and has a short cylindrical side wall part and a disk-like top plate part, The lid and the vertical tube are made of synthetic resin, and the valve lid is detachably attached to the vertical tube by screwing.

The third invention is dependent on the first or second invention, and the float is made of a synthetic resin and has a cylindrical side wall.

A fourth invention is a water pipe air valve attached to a water pipe, comprising: a valve lid connected to the water pipe; a first opening provided on the valve lid for communicating the upper and lower sides of the valve lid; A first sliding body having a second opening which is slidably provided in one opening and communicates the upper and lower sides thereof, a second sliding body which is slidably provided in the second opening, and a second sliding body A float provided in the lower portion, a first air passage formed outside the second opening and communicating with the upper and lower sides of the valve lid, and formed through the second sliding body inside the second opening. A second air path that communicates between the upper and lower sides, a first valve body that is provided on the first sliding body and that contacts the lower surface of the valve lid and blocks communication of the first air path, and a first air path that is provided on the float. It is a water pipe air valve provided with the 2nd valve body which contact | abuts the lower surface of a sliding body and interrupts | blocks communication of a 2nd air path.

According to the fourth invention, the first sliding body is slid into the first opening formed in the valve lid, and the second sliding body is slid into the second opening formed in the first sliding body. Therefore, the sliding portions (in the embodiment, the first shaft portion and the second shaft portion) of the first sliding body and the second sliding body are not immersed in water, and foreign matter is less likely to enter the sliding portion. Moreover, since the shape of the part immersed in water does not become complicated, it is hard to clog a foreign material. In addition, with such a configuration, each air passage can be formed in a straight line, so it is possible to make a simpler configuration, even if water has entered each air passage and foreign matter has entered. , Foreign objects are easily washed away. Therefore, foreign matters such as dust are not easily clogged, and maintenance is easy.

A fifth invention is a water pipe air valve attached to a water pipe, comprising: a valve lid connected to the water pipe; a first opening provided on the valve lid for communicating the upper and lower sides of the valve lid; 1st sliding body which has a 2nd opening part which was slidably provided in 1 opening part, and connected the upper direction and the downward direction, 2nd sliding body slidably provided in 2nd opening part, 2nd sliding body A first air passage formed on the outside of the valve lid that communicates with the upper and lower sides of the valve lid, formed on the outside of the first opening, and on the lower side of the valve lid. A second air passage communicating with the lower portion, a first valve body provided on the first sliding body and contacting the lower surface of the valve lid to block communication of the first air passage, and a first sliding body provided on the float It is a water pipe air valve provided with the 2nd valve body which contact | abuts the lower surface of this and interrupts | blocks communication of a 2nd air path.

In the fifth invention, for example, a through hole (74) that penetrates the top plate part (16) and the guide part (22) of the canopy (12) is provided, and this through hole is used as the first air passage (70). Is done.
According to the fifth invention, as in the fourth invention, foreign matters such as dust are not easily clogged, and maintenance management is facilitated.

A sixth invention is a water pipe air valve attached to a water pipe, comprising: a valve lid connected to the water pipe; a first opening provided on the valve lid for communicating the upper and lower sides of the valve lid; A first sliding body having a second opening which is slidably provided in one opening and communicates the upper and lower sides thereof, a second sliding body which is slidably provided in the second opening, and a second sliding body A float provided in the lower part, a first air passage formed through the first sliding body outside the second opening and communicating with the upper and lower sides of the valve lid, formed inside the second opening and the valve lid A second air path that communicates between the upper and lower sides, a first valve body that is provided on the first sliding body and that contacts the lower surface of the valve lid and blocks communication of the first air path, and a first air path that is provided on the float. It is a water pipe air valve provided with the 2nd valve body which contact | abuts the lower surface of a sliding body and interrupts | blocks communication of a 2nd air path.

In the sixth invention, for example, a through hole (78) penetrating the tube wall of the first sliding body (30 ) is provided, and this through hole is used as the first air passage (70).
According to the sixth invention, as in the fourth invention, foreign matters such as dust are not easily clogged, and maintenance management becomes easy.

  According to the present invention, since the structure of the portion immersed in water can be simplified, it is difficult for foreign matters such as dust to be clogged, and maintenance is facilitated. In addition, with such a configuration, the air path can be formed in a straight line, so that a simpler structure can be achieved.

  The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

  Referring to FIG. 1, a water pipe air valve (hereinafter simply referred to as an “air valve”) 10 according to an embodiment of the present invention is installed vertically on a water pipe 100 such as an agricultural water pipe. Air attached to the pipe 102 is discharged, or air mixed in the water pipe 100 is discharged, or air is introduced into the water pipe 100 when water in the water pipe 100 is discharged. Note that the inner diameter of the vertical tube 102 is appropriately set according to the inner diameter of the water supply tube 100, and is, for example, 100 mm.

  As shown in FIGS. 2 and 3, the air valve 10 includes a valve lid 12 formed of a synthetic resin such as polyvinyl chloride. The valve lid 12 includes a short cylindrical side wall portion 14 and a disk-shaped top plate portion 16 provided at the upper end thereof. The inner diameter of the side wall portion 14 is appropriately set corresponding to the outer diameter of the vertical tube 102. A thread groove 18 is formed on the inner surface of the side wall 14, and the valve lid 12 is detachably attached to the longitudinal pipe 102 by screwing the thread groove 18 and a thread 104 formed on the outer surface of the longitudinal pipe 102. It is done. Moreover, the groove part 20 is formed in the lower end of the side wall part 14 along the inner surface. When the valve lid 12 is attached to the vertical tube 102, the rubber ring 106 attached to the hook-shaped protrusion formed on the outer surface of the vertical tube 102 abuts the inner surface of the groove portion 20, and The tube 102 is watertightly connected. Furthermore, the outer side surface of the top plate part 16, that is, the outer surface upper part of the side wall part 14 is formed so as to be undulated in the circumferential direction. The shape makes it easy for the operator to put effort.

  A guide portion 22 is integrally formed at the center of the top plate portion 16. The guide part 22 has a columnar first opening 24 that communicates the upper part and the lower part of the top plate part 16 (valve cover 12), and is cylindrical so as to protrude from the upper surface and the lower surface of the top plate part 16. It is formed. A cover 26 is detachably mounted on the upper portion of the guide portion 22. The cover 26 is made of a synthetic resin such as polyvinyl chloride or the like, and is formed into a top cylindrical shape having an opening 28 on its side wall. For example, the cover 26 can be attached to and detached from the guide portion 22 (valve cover 12) by screwing a screw groove formed in the upper portion of the outer surface of the guide portion 22 and a screw thread formed in the lower portion of the inner surface of the cover 26. It is attached. The cover 26 passes through the first opening 24 (specifically, the first air passage 70 or the second air passage 72 described later), and the water in the water supply pipe 100 should jump out to the outside. In addition, the scattering of water is prevented, and foreign matter such as dust is prevented from entering the first opening 24 from the outside.

  A first sliding body 30 is slidably provided in the first opening 24 of the guide portion 22. As shown in FIG. 4, the first sliding body 30 includes a hollow shaft-shaped first shaft portion 32 and is formed of a metal such as brass or carbon steel. The first shaft portion 32 has a cylindrical second opening 34 that communicates the upper and lower portions of the first shaft portion 32 in the axial direction at the center thereof. In addition, the outer surface 36 of the first shaft portion 32 is formed as a curved surface along the side surface of the first opening 24 (that is, the inner surface of the guide portion 22). It is formed. Thereby, a space is formed between the notch 38 and the first opening 24. In this embodiment, two cutout portions 38 that are formed in a planar shape extending in the vertical direction and extending in parallel to each other are formed. However, the notch 38 is smoothly curved outward at the lower end thereof. The outer diameter of the first shaft portion 32 is set to be approximately the same as the diameter of the first opening 24, but considering the slidability of the first shaft portion 32 (first sliding body 30), It is set slightly smaller than the diameter of one opening 24.

  At the lower end of the first shaft portion 32, a hook-like portion 40 that protrudes like a hook from the outer side surface 36 is integrally formed. A rubber ring groove is formed in the outer surface 36 of the first shaft portion 32 along the upper surface of the hook-shaped portion 40, and a rubber ring 42 is attached thereto. Although the specific operation will be described later, the hook-shaped portion 40 contacts the lower surface of the guide portion 22 of the valve lid 12 through the rubber ring 42 at the upper limit position of the first sliding body 30. That is, the guide part 22 of the valve lid 12 functions as a first valve seat, and the hook-shaped part 40 of the first sliding body 30 functions as a first valve body.

  Further, two through holes 44 are formed in the upper portion of the first shaft portion 32 so as to connect the two notches 38 outside the second opening 34. A cylindrical first locking portion 46 is inserted into each of the two through holes 44. The first locking portion 46 is provided so as to protrude from the notch portion 38, abuts against the upper surface of the guide portion 22 at the lower limit position of the first sliding body 30, and prevents the first sliding body 30 from falling off. Thereby, the part above the 1st latching | locking part 46 of the 1st sliding body 30 maintains the state which always protruded (exposed) from the upper surface of the valve lid 12 (guide part 22). As the 1st latching | locking part 46, it is good to utilize a general purpose spring pin etc., for example. Specifically, the spring pin is a cylindrical pin having a notch extending in the axial direction, and has a spring action in the radial direction. Therefore, the spring pin has a slightly larger maximum diameter than the diameter of the through hole 44. The first locking portion 46 is detachably attached to the first shaft portion 32 by preparing a pin and inserting the spring pin into the through hole 44.

  A second sliding body 48 is slidably provided in the second opening 34 of the first shaft portion 32 (first sliding body 30). As shown in FIG. 5, the 2nd sliding body 48 contains the column-shaped 2nd shaft part 50, and is formed with metals, such as a brass and carbon steel. The outer diameter of the second shaft portion 50 is set smaller than the diameter of the second opening portion 34, and a gap is formed between the side surface of the second shaft portion 50 and the side surface of the second opening portion 34. In other words, the difference in diameter (or “backlash”) between the second shaft portion 50 and the second opening 34 is the minimum provided in consideration of the slidability of the second shaft portion 50 (second sliding body 48). The diameter difference is set larger than the diameter difference. However, if this difference in diameter is made too large, the second sliding body 48 will fluctuate, and there is a possibility that the second air passage 72 described later cannot be stably closed. Therefore, the second shaft portion 50 and the second opening portion 34 may be blocked. Is set in consideration of the blockage of the second air passage 72.

  A ring-shaped second locking portion 52 is provided on the upper portion of the second shaft portion 50. The second locking portion 52 protrudes in a bowl shape from the side surface of the second shaft 50 and contacts the upper surface of the first shaft portion 32 at the lower limit position of the second sliding body 48 to prevent the second sliding body 48 from falling off. To do. Thereby, the part above the 2nd latching | locking part 52 of the 2nd sliding body 48 maintains the state which always protruded from the upper surface of the 1st sliding body 30 (1st shaft part 32). As the 2nd latching | locking part 52, a general purpose nut can be utilized, for example. Specifically, a screw thread 54 is formed on the upper side surface of the second shaft portion 50, and a nut is fitted on the screw thread 54.

  Further, a hook-like member 56 that protrudes like a hook from the side surface is provided at the lower portion of the second shaft portion 50. The flange-shaped member 56 is formed in a short cylindrical shape having a through hole at the center thereof, and is fitted on the second shaft portion 50. For example, a screw groove is formed on the side surface of the through hole, and the screw groove 58 formed on the lower portion of the side surface of the second shaft 50 is screwed together, whereby the flange-shaped member 56 is removed from the second shaft portion 50. It can be fitted externally. Further, a rubber ring groove is formed along the through hole on each of the upper surface and the lower surface of the bowl-shaped member 56, and the rubber rings 60 and 62 are mounted. Although the specific operation will be described later, the hook-shaped member 56 contacts the lower surface of the hook-shaped portion 40 of the first sliding body 30 through the rubber ring 60 at the upper limit position of the second sliding body 48. That is, the hook-shaped portion 40 of the first sliding body 30 also functions as a second valve seat, and the hook-shaped member 56 of the second sliding body 48 functions as a second valve body.

  Returning to FIG. 3, a float 64 is provided below the second shaft portion 50 (second sliding body 48) at a position below the hook-shaped member 56 described above. The float 64 is formed, for example, in a bell shape from a synthetic resin such as polyvinyl chloride. When the float 64 is provided in the second shaft portion 50, for example, a hole is formed in the center of the upper portion of the float 64, the lower end of the second shaft portion 50 is inserted into the hole, and a nut is inserted through the washer from below. 66, and the float 64 may be fixed so as to be sandwiched between the hook-shaped member 56 and the nut 66. At this time, the watertightness between the hook-shaped member 56 and the float 64 is ensured by the rubber ring 62 attached to the lower surface of the hook-shaped member 56.

  A spacer 68 is attached between the lower surface of the second locking portion 52 and the upper surface of the first shaft portion 32. The spacer 68 is provided in order to prevent the lower surface of the second locking portion 52 and the upper surface of the first shaft portion 32 from coming into contact with each other when the second sliding body 48 is in its lower limit position. . That is, the spacer 68 forms a gap between the lower surface of the second locking portion 52 and the upper surface of the first shaft portion 32 to prevent the second air passage 72 described later from being blocked at that position. Is. For example, a general-purpose spring washer or wave washer can be used as the spacer 68. Further, for example, a plurality of protrusions are formed on the upper surface of the first shaft portion 32 and the second air is supported by the upper ends of the protrusions so as to support the second locking portions 52 of the second sliding body 48. The blockage of the path 72 may be prevented.

  FIG. 6 is a partial cross-sectional view showing a cross section of the vicinity of the first opening 24 of the valve lid 12 as viewed from above. As described above, since the planar cutout 38 extending in the vertical direction is formed in a part of the first shaft portion 32, the vertical extension extends between the cutout 38 and the first opening 24. A linear space having a constant cross-sectional shape is formed. This space becomes the first air passage 70 for supplying and discharging a large amount of air. Further, since the outer diameter of the second shaft portion 50 is set smaller than the diameter of the second opening portion 34, the second shaft portion 50 has a linear shape extending in the vertical direction between the second shaft portion 50 and the second opening portion 34. A gap having a constant cross-sectional shape is formed. This gap becomes the second air path 72 for performing a small amount of exhaust (exhaust under pressure).

  The operation of the air valve 10 will be described with reference to FIGS. As described above, the air valve 10 discharges air mixed in the water supply pipe 100 or introduces air into the water supply pipe 100 when water in the water supply pipe 100 is discharged.

  As shown in FIG. 7, when water flow (filling) into the water pipe 100 is started or when water in the water pipe 100 is discharged, there is no water in the vertical pipe 102 (or the water level is low). Since the pressure in the vertical tube 102 is also low, the float 64 (second sliding body 48) is in a lowered state. At this time, the upper surface of the bowl-shaped portion 40 of the first shaft portion 32 and the lower surface of the guide portion 22 of the valve lid 12 are separated from each other, and the first air passage 70 is located above and below the valve lid 12 (that is, the feed). The outside and inside of the water pipe 100 communicate with each other. Further, the upper surface of the flange-shaped member 56 of the second shaft portion 50 is separated from the lower surface of the flange-shaped portion 40 of the first shaft portion 32, and the second air passage 72 is above and below the first sliding body 30. (That is, above and below the valve lid 12). Thus, when the 1st air path 70 and the 2nd air path 72 will be in a communication state, when water flow into the water pipe 100 is started, a large amount of air can be discharged from the water pipe 100, and the water pipe When discharging the water in 100, a large amount of air can be introduced into the water pipe 100.

  As shown in FIG. 8, when the water flow into the water pipe 100 is completed and the water level in the vertical pipe 102, that is, around the float 64 rises, the second sliding body 48 is lifted by the buoyancy received by the float 64. To rise. The upper surface of the flange-shaped member 56 of the second shaft portion 50 and the lower surface of the flange-shaped portion 40 of the first shaft portion 32 are in contact with each other via the rubber ring 60, and the communication of the second air passage 72 is blocked. . As the second sliding body 48 is raised, the first sliding body 30 is also lifted so as to be pushed up. Then, the upper surface of the bowl-shaped portion 40 of the first shaft portion 32 and the lower surface of the guide portion 22 of the valve lid 12 are in contact with each other via the rubber ring 42, and the communication of the first air passage 70 is blocked. Thereby, the discharge or introduction of air is stopped and the discharge of water to the outside is prevented. At this time, only the float 64 is immersed in water, and even if the inside of the pipe becomes high pressure and the water surface rises, the sliding portion of the first shaft portion 32 and the second shaft portion 50, the first air passage 70 and Water does not enter the second air passage 72.

  Further, when the air mixed in the water supply pipe 100 is accumulated in the vertical pipe 102, as shown in FIG. 9, the buoyancy received by the float 64 is reduced and the second sliding body 48 is lowered. Thereby, the 2nd air path 72 will be in a communication state, and the air mixed in the water pipe 100 will be discharged | emitted through the 2nd air path 72 outside.

  Note that the atmospheric pressure is P1, the pressure in the vertical pipe 102 (water pipe 100) is P2, and the cross-sectional area of the second shaft portion 50 (more precisely, the inner side of the contact portion between the lower surface of the bowl-shaped portion 40 and the rubber ring 60) S) and the weight of the entire second sliding body 48 (that is, including the float 64) as W, when the value of “(P2−P1) × S” is larger than the value of “W”, Even if the buoyancy received by the float 64 decreases, the second sliding body 48 does not descend. However, in this embodiment, since the cross-sectional area (pressure receiving area) of the second shaft portion 50 is small, the second sliding body 48 operates even when the pressure in the vertical tube 102 is high. That is, exhaust under pressure can be performed. In other words, in this embodiment, the outer diameter of the second shaft portion 50 is set so that the exhaust can be performed even when the pressure in the vertical tube 102 is high (for example, 0.2 MPa).

  In addition, when the pressure in the vertical tube 102 is low (for example, when the pressure is about the same as or lower than the atmospheric pressure), the first sliding body 30 is also lowered by its own weight as the second sliding body 48 is lowered. Since the 1st air path 70 will be in a communication state, mass exhaust_gas | exhaustion becomes possible. Further, even when the pressure in the vertical tube 102 is relatively high and the first sliding body 30 is not lowered only by its own weight, the second locking portion 52 is moved to the first sliding body as the second sliding body 48 is lowered. The first sliding body 30 can be lowered by pushing down the moving body 30 or applying an impact to the first sliding body 30.

  In this embodiment, the guide portion 22 (first opening portion 24) is provided in the valve lid 12, and the float 64 is provided in the lower portion of the second sliding body 48, whereby the first shaft portion 32, the second shaft portion 50, etc. Since the sliding part (operating part) is not immersed in water, foreign matter such as dust is difficult to enter the sliding part. Moreover, since the part immersed in water is only the float 64, the shape of the part immersed in water becomes simple. That is, unlike the technique of Patent Document 1, since the guide tube is not provided in the valve box, the shape of the portion immersed in water is not complicated, and foreign substances are not easily clogged.

  Furthermore, since the first air passage 70 and the second air passage 72 are formed in a straight line extending in the vertical direction, even if water enters the air passages 70 and 72 and foreign matter enters, the foreign matter is washed away. It is easy to get caught and hard to clog. In addition, even if foreign matter is clogged, it is easy to remove the foreign matter.

  In addition, since the upper portions of the first sliding body 30 and the second sliding body 48 always protrude (expose) from the upper surface of the valve lid 12, the first sliding body is mounted with the air valve 10 attached to the vertical tube 102. 30 and the second sliding body 48 can be manually moved from the outside. That is, the operation of the operating part can be confirmed without disassembling the air valve 10, and maintenance is easy. Further, oil can be supplied from a portion protruding outside without disassembling the air valve 10.

  Further, a thread groove 18 is formed on the inner surface of the side wall portion 14 of the valve lid 12, and a thread 104 is formed on the outer surface of the vertical tube 102 so that the valve lid 12 and the vertical tube 102 are connected by screwing them. Therefore, the air valve 10 can be easily attached and detached without using a tool or the like. That is, the overhaul work of the air valve 10 is facilitated. Similarly, the cover 26 can be easily attached and detached.

  Therefore, according to this embodiment, it is possible to provide the air valve 10 that is not easily clogged with foreign matters such as dust and is easy to maintain.

  In the above-described embodiment, the two first through holes 44 are formed in the upper portion of the first shaft portion 32 and the columnar member is inserted therethrough to form the first locking portion 46. The shape and attachment method of the locking portion 46 are not limited to this. For example, the first locking portion 46 may be formed in a ring shape or a C shape so as to be externally fitted to the first shaft portion 32 so that it can be removed. Moreover, although the 1st shaft part 32 and the bowl-shaped part 40 were integrally formed previously, it is not limited to this, Each is formed as a separate member and welding, adhesion | attachment, or a screw system etc. are utilized. And may be connected.

  Moreover, although the ring-shaped member was externally fitted to the upper part of the 2nd shaft part 50, and it was set as the 2nd latching | locking part 52, the shape and attachment method of the 2nd latching | locking part 52 are not limited to this. For example, a C-shaped member may be externally fitted, or a rod-shaped member may be inserted in the same manner as the first locking portion 46 of the first shaft portion 32. Moreover, although the 2nd shaft part 50, the hook-shaped member 56, and the float 64 were formed as a separate member and connected using the screw system, it is not limited to this. For example, the connection may be made using a method such as welding or adhesion, or may be integrally formed in advance. Of course, the hook-shaped member 56 and the float 64 may be formed integrally and connected to the second shaft portion 50. Further, the float 64 itself may function as the second valve body. That is, the upper surface of the float 64 is in contact with the lower surface of the flange 40 (second valve seat) of the first sliding body 30 via a rubber ring so that the communication of the second air passage 72 is blocked. You can also.

  Further, the valve lid 12 and the guide portion 22 are integrally formed in advance. However, the present invention is not limited to this, and the valve lid 12 and the guide portion 22 are formed as separate members and connected using welding, bonding, or a screw method. You may make it do.

  Moreover, in the above-mentioned Example, although the shape of the float 64 was made into the bell shape, it is not limited to this. For example, it may be formed in a spherical shape or an elliptical spherical shape, or may be formed in a cylindrical shape with a top or a bottom with a bottom.

  Furthermore, in the above-described embodiment, the two cutout portions 38 extending in parallel with each other are formed in the first shaft portion 32 of the first sliding body 30, but the shape of the cutout portion 38 is not limited to this. For example, as shown in FIGS. 10 and 11, three notches 32 can be formed, and one or four or more notches 32 can be formed. Moreover, as shown in FIG. 12, it is not necessary to form the notch part 38 in parallel mutually. Furthermore, as shown in FIG. 13, it is not always necessary to form the notch 38 in a planar shape, and it may be formed in a curved surface shape or a groove shape.

  In the above-described embodiment, the notch 38 is formed in the first shaft portion 32 of the first sliding body 30, and the first air passage 70 is formed by the first opening 24 and the notch 38. However, the present invention is not limited to this. For example, a through hole 74 may be formed in the valve lid 12 and the through hole 74 may be used as the first air passage 70. Specifically, as shown in FIGS. 14 and 15, one or more (four in the embodiment shown in FIGS. 14 and 15) through-holes that vertically penetrate the top plate portion 16 of the valve lid 12. 74 may be formed around the first opening 24. At this time, the hook-like portion 40 of the first sliding body 30 may be formed so as to extend outward from the through holes 74, and the rubber ring 42 may be provided on the outer edge of the upper surface of the hook-like portion 40. . Of course, the through-hole 74 can also be formed so as to penetrate through the guide portion 22. Further, the shape of the through hole 74 does not have to be circular as shown in FIG. 15, and the cross sectional shape may be C-shaped or rectangular.

  For example, as shown in FIG. 16, a groove-shaped notch 76 is formed on the side surface of the first opening 24 (the inner surface of the guide portion 22), and the notch 76 and the outer surface 36 of the first shaft portion 32. Thus, the first air passage 70 can be formed.

  Here, when forming the notch part 38 in the 1st sliding body 30 (1st shaft part 32), when trying to form the larger 1st air path 70, the outer diameter of the 1st sliding body 30 is enlarged. There is a need. However, as described above, the first air passage 70 is formed by using the through hole 74 and the notch 76 formed in the valve lid 12, so that the diameter of the first sliding body 30 is increased without increasing. The first air passage 70 can be formed.

  Further, the first air passage 70 can be formed so as to penetrate the tube wall of the first sliding body 30. Specifically, for example, as shown in FIGS. 17 and 18, a linear through hole 78 that penetrates the tube wall of the first sliding body 30 in the vertical direction is formed, and the through hole 78 is formed in the first air passage. It may be used as 70. The through hole 78 is curved at the lower portion thereof and opens at the lower portion of the outer surface 36 of the first shaft portion 32. As described above, if the first air passage 70 penetrating the tube wall of the first sliding body 30 is formed, the processing cost may increase, but the outer surface 34 of the first shaft portion 32 can be formed in a circular cross section. Therefore, the first sliding body 30 can be slid (operated) more smoothly.

  For example, as shown in FIG. 19, the second opening 34 is not necessarily formed at the center of the first sliding body 30, and the second opening 34 may be formed eccentrically. In this case, for example, the through hole 78 may be formed and used as the first air passage 70, or the cutout portion 38 may be formed and used as the first air passage 70.

  In the above-described embodiment, the outer diameter of the second shaft portion 50 (second sliding body 48) is made smaller than the diameter of the second opening 34 of the first sliding body 30, whereby the second shaft portion 50. Although a gap is formed between the side surface and the side surface of the second opening 34 and this gap is used as the second air passage 72, the present invention is not limited to this. For example, a groove extending in the vertical direction may be formed on the side surface of the second shaft portion 50, and a space formed between the groove and the side surface of the second opening 34 may be used as the second air passage 72. In this case, the gap between the side surface of the second shaft portion 50 and the side surface of the second opening 34 may be set to a minimum size that allows the second sliding body 48 to slide. Further, instead of (or together with) forming a groove on the side surface of the second shaft portion 50, a groove may be formed on the inner surface of the first shaft portion 32. As described above, by forming a groove on the side surface of the second shaft portion 50 or the inner side surface of the first sliding body 30 to form the second air passage 72, the number of manufacturing steps (processing steps) increases. Therefore, the second sliding body 48 can slide without wobbling, and the second air passage 72 can be reliably closed (that is, the sealing performance is improved).

  Further, the second air passage 72 may be formed so as to penetrate the inside of the second sliding body 48 in the axial direction. However, since it may be difficult to form a through hole in the second sliding body 48 having a small outer diameter, the second air path 72 is formed on the side surface of the second sliding body 48 in consideration of ease of manufacture and processing cost. It is desirable to form between the second opening 34 and the side surface of the second opening 34.

  In the above-described embodiment, the vertical tube 102 and the valve lid 12 are connected using a screw system in which the screw thread 104 and the screw groove 18 are screwed together. However, the present invention is not limited to this. For example, even if the so-called bayonet method (or turn-up method), in which the vertical tube 102 and the valve lid 12 are rotationally fitted and fixed, is connected, the air valve 10 can be easily attached and detached. Similarly, the bayonet system can be used for connection of the cover 26. Furthermore, the air valve 10 can also be included in the structure by using the vertical tube 102 as a valve box. In this case, for example, the valve lid 12 and the vertical pipe 102 may be integrally formed.

It is an illustration figure which shows simply a mode that the air valve for water pipes of one Example of this invention was provided in the water pipe. It is a top view which shows the air valve for water pipes of FIG. It is sectional drawing which shows the cross section which looked at the air valve for water pipes of FIG. 1 from the side. It is a perspective view which shows an example of a 1st sliding body. It is a perspective view which shows an example of a 2nd sliding body. It is a fragmentary sectional view which shows a part of cross section which looked at the air valve for water pipes of FIG. 1 from upper direction. It is a fragmentary sectional view showing the state where both the 1st air passage and the 2nd air passage of the air valve for water pipes of Drawing 1 are opened. It is a fragmentary sectional view showing the state where both the 1st air passage and the 2nd air passage of the air valve for water pipes of Drawing 1 are closed. It is a fragmentary sectional view showing the state where only the 2nd air way of the float of the air valve for water pipes of Drawing 1 is opened. It is a perspective view which shows another example of a 1st sliding body. It is a fragmentary sectional view which shows a part of cross section which looked at the air valve for water pipes using the 1st sliding body of FIG. 10 from upper direction. It is a fragmentary sectional view showing a part of section which looked at the air valve for water pipes which used the 1st sliding body of other examples as seen from the upper part. It is a fragmentary sectional view showing a part of section which looked at the air valve for water pipes which used the 1st sliding body of other examples as seen from the upper part. It is a fragmentary sectional view which shows a part of cross section which looked at the air valve for water supply pipes of the other Example of this invention from the side. It is a fragmentary sectional view which shows a part of cross section which looked at the air valve for water pipes of FIG. 14 from upper direction. It is a fragmentary sectional view which shows a part of cross section which looked at the air valve for water pipes of the further another Example of this invention from upper direction. It is a perspective view which shows another example of a 1st sliding body. It is the fragmentary sectional view which shows a part of cross section which looked at the air valve for water pipes using the 1st sliding body of FIG. 17 from upper direction. It is a fragmentary sectional view showing a part of section which looked at the air valve for water pipes which used the 1st sliding body of other examples as seen from the upper part.

Explanation of symbols

10 ... Air valve for water pipe 12 ... Valve cover 22 ... Guide part (first valve seat)
24 ... 1st opening part 30 ... 1st sliding body 32 ... 1st shaft part 34 ... 2nd opening part 38 ... Notch part 40 ... A bowl-shaped part (1st valve body, 2nd valve seat)
48 ... second sliding part 50 ... second shaft part 56 ... bowl-shaped member (second valve element)
64 ... Float 70 ... 1st air path 72 ... 2nd air path 100 ... Water pipe 102 ... Vertical pipe

Claims (6)

A water pipe air valve attached to the water pipe,
A valve lid connected to the water pipe;
A first opening provided in the valve lid and communicating with the upper and lower sides of the valve lid;
A first sliding body provided in the first opening so as to be slidable and having a second opening communicating with the upper and lower sides thereof;
A state of protruding from the upper part of the outer surface of the first sliding body, preventing the first sliding body from falling off from the valve lid, and the upper portion of the first sliding body always projecting from the upper surface of the valve lid A first locking part for maintaining
A second sliding body slidably provided in the second opening,
A float provided at a lower portion of the second sliding body;
A first air passage formed outside the second opening and communicating above and below the valve lid;
A second air passage formed inside the second opening and communicating above and below the valve lid;
A first valve body provided on the first sliding body, contacting the lower surface of the valve lid and blocking communication of the first air path; and provided on the float; and a lower surface of the first sliding body An air valve for a water pipe comprising a second valve body that contacts and blocks communication of the second air passage. The valve lid is connected to the water supply pipe via a vertical pipe, and has a short cylindrical side wall part and a disk-like top plate part,
The air valve for a water pipe according to claim 1 , wherein the valve lid and the vertical pipe are made of synthetic resin, and the valve lid is detachably attached to the vertical pipe by screwing . The water valve according to claim 1 or 2, wherein the float is made of synthetic resin and has a cylindrical side wall . A water pipe air valve attached to the water pipe,
A valve lid connected to the water pipe;
A first opening provided in the valve lid and communicating with the upper and lower sides of the valve lid;
A first sliding body provided in the first opening so as to be slidable and having a second opening communicating with the upper and lower sides thereof;
A second sliding body slidably provided in the second opening,
A float provided at a lower portion of the second sliding body;
A first air passage formed outside the second opening and communicating above and below the valve lid;
Formed through Oite the second sliding body inside said second opening, the second air passage for communicating the upper and lower side of the valve cover,
A first valve body provided on the first sliding body, contacting the lower surface of the valve lid and blocking communication of the first air path; and provided on the float; and a lower surface of the first sliding body An air valve for a water pipe comprising a second valve body that contacts and blocks communication of the second air passage. A water pipe air valve attached to the water pipe,
A valve lid connected to the water pipe;
A first opening provided in the valve lid and communicating with the upper and lower sides of the valve lid;
A first sliding body provided in the first opening so as to be slidable and having a second opening communicating with the upper and lower sides thereof;
A second sliding body slidably provided in the second opening,
A float provided at a lower portion of the second sliding body;
A first air passage formed outside the second opening and the first opening and communicating between the upper and lower sides of the valve lid;
A second air passage formed inside the second opening and communicating above and below the valve lid;
A first valve body provided on the first sliding body, contacting the lower surface of the valve lid and blocking communication of the first air path; and provided on the float; and a lower surface of the first sliding body An air valve for a water pipe comprising a second valve body that contacts and blocks communication of the second air passage. A water pipe air valve attached to the water pipe,
A valve lid connected to the water pipe;
A first opening provided in the valve lid and communicating with the upper and lower sides of the valve lid;
A first sliding body provided in the first opening so as to be slidable and having a second opening communicating with the upper and lower sides thereof;
A second sliding body slidably provided in the second opening,
A float provided at a lower portion of the second sliding body;
Wherein from the second opening is formed through the Oite the first sliding body on the outside, a first air passage for communicating the upper and lower side of the valve cover,
A second air passage formed inside the second opening and communicating above and below the valve lid;
A first valve body provided on the first sliding body, contacting the lower surface of the valve lid and blocking communication of the first air path; and provided on the float; and a lower surface of the first sliding body An air valve for a water pipe comprising a second valve body that contacts and blocks communication of the second air passage.

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