JP6600855B2 - Air valve - Google Patents

Description

  The present invention relates to an air valve that is connected to a water pipe and performs intake and exhaust.

  Conventionally, air valves connected to water pipes have been widely used in various places. The air valve has an air intake function that guides the air into the water pipe in order to efficiently drain the water in the water pipe during installation, expansion, or replacement of the water pipe. With the function of large volume exhaust (rapid exhaust) that exhausts a large amount of air (including other gases) in the water pipe to the outside through a large air hole and water flowing through the water pipe at normal pressure later A device having a function of exhausting a small amount of air mixed into a water pipe due to various causes through a small air hole little by little (for example, Patent Documents 1 to 4) is generally used.

  In general, such an air valve has, as a basic structure, a valve box connected to a water pipe, a lid body in which large air holes are formed and attached to the valve box, and a large lid body arranged in the valve box. The floating valve body which can block an air hole from the lower part, and the float valve body distribute | arranged in the valve box are provided. The small air holes are formed in the floating valve body or the lid body. The float valve body can block the small air hole from below. The float valve element and the idle valve element have a specific gravity smaller than that of water, and the idle valve element is lighter than the float valve element. A separate repair valve having a cock portion for controlling the intrusion of water into the valve box is usually connected between the air valve and the water pipe.

  When exhausting a large amount of air, the air is rapidly exhausted through an intake / exhaust passage communicating with the large air hole. The large amount of exhaust is performed until the cock of the repair valve is opened and water enters the valve box from the water pipe until the floating valve closes the lid from the bottom close to the lid. After a large amount of exhaust is completed, a small amount of exhaust is performed when air enters the water pipe through the water pipe and enters the air reservoir near the upper end of the float valve element. When exhausting a small amount, the air passes through a small air hole formed in the floating valve body or the lid body and is exhausted through an intake / exhaust passage communicating with the small air hole. When the air in the air reservoir near the upper end of the float valve body becomes sufficiently small, the float valve body comes to close the small air hole from below, and the exhaust is stopped.

  In the air valve disclosed in Patent Document 1, the lid is fixed to the valve box by screwing a female screw formed on the lid with a male screw formed on the outer surface of the upper part of the valve box. In the air valve disclosed in Patent Document 2, the lid is fixed to the valve box by bolts.

  Moreover, in the air valve disclosed in Patent Documents 3 and 4, the lid (inner lid) is moved by rotating a plurality of levers provided in the valve box to press the lid (inner lid). It is fixed to the valve box. By doing so, in the assembly (and disassembly) after the disassembly such as during maintenance work, the lid can be fixed (and unlocked) to the valve box by a simple operation (easy and quick). Further, in the air valve of Patent Document 4, the valve box, the lid, etc. are enlarged and the number of levers is increased more firmly so as to be suitable when a large amount of exhaust is required for large-volume exhaust. The lid is fixed to the valve box so that it can withstand even the pressure applied to the lid becomes very high.

JP-A-9-166234 JP 2003-139260 A JP 2009-121678 A JP 2013-043356 A

  Thus, when the pressure applied to the lid can be very high, it is necessary to make the lid more firmly fixed to the valve box. However, even in such a case, it is desirable that the lid can be fixed to the valve box by a simpler operation.

  The present invention has been made in view of the above reasons, and its purpose is to withstand even when the pressure applied to the lid is very high, and the lid can be firmly attached to the valve box by a simple operation. The object is to provide a pneumatic valve that can be fixed.

In order to achieve the above object, the air valve according to claim 1 is connected to a water pipe through which tap water flows, and the air mixed in the water pipe can be exhausted outside through a large air hole or a small air hole. A valve box that is connected to the water pipe and has a valve box body part and a plurality of lid fixing parts provided extending upward from the valve box body; It is mounted via a packing, wherein the large air hole is formed, a lid body having a plurality of insertion portions, and disposed in the valve box main body portion, and the large air hole of the lid body is disposed below A floating valve body that can be closed from the valve box body, and a float valve body disposed in the valve box main body, wherein the floating valve body or the lid body has the small air holes formed therein, and the float The valve body is capable of closing the small air hole from below, and the lid body is By moving, when the insertion portion is inserted into the cover fixing part, it is mounted on the valve body said lid is lowered by pressing the lid attachment packing from above, the upper side of the lid mounting gasket Is provided with an auxiliary ring that reduces sliding resistance caused by the rotation of the lid.

The air valve according to claim 2 is an air valve connected to a water pipe through which tap water flows, and capable of exhausting air mixed in the water pipe to the outside through a large air hole or a small air hole. A valve box having a valve box body part and a plurality of lid fixing parts provided extending upward from the valve box body part, and attached to the valve box body part via a lid mounting packing The large air hole is formed, a lid body having a plurality of insertion portions, a floating valve body arranged in the valve box main body portion and capable of closing the large air hole of the lid body from below, A float valve body disposed in the valve box body, wherein the floating valve body or the lid body is formed with the small air holes, and the float valve body includes the small air holes. Can be closed from below, and the lid can be rotated to insert the insertion portion. By being inserted into the cover fixing part, wherein the lid is lowered are attached to the valve body by pressing the lid attachment packing from above, the lid and / or said valve body, said valve body It has a reverse rotation prevention part which prevents that the said cover body with which it was mounted | worn was rotated in the direction opposite to the insertion direction.

The air valve according to claim 3 is the air valve according to claim 2 , wherein the reverse rotation preventing portion has a lever that rotates in the vertical direction in the vicinity of the insertion portion on the lid. The valve box has a lever receiving groove that can receive a part of the lever.

The air valve according to a fourth aspect of the present invention is the air valve according to any one of the first to third aspects, wherein the lid fixing portion has a side portion and a protruding portion protruding inward from the upper portion thereof. The lower surface of the protruding portion is formed by a lower surface inclined portion in which all or part of the lower surface is inclined downward from one end surface side to the other end surface side of the protruding portion, and the upper surface of the insertion portion is the insertion portion All or part of the upper surface is inclined upward from one end surface side to the other end surface side, and the one end surface of the insertion portion is formed on the one end surface of the projection portion. It is characterized by being inserted into the lower side.

The air valve according to claim 5 is the air valve according to any one of claims 1 to 4 , wherein the lid body has a handle cap on a top surface of which the tip of the opening key is fitted. It is characterized by.

The air valve according to claim 6 is the air valve according to any one of claims 1 to 5 , wherein the lower surface inclined portion is a part of the protrusion by being mounted. Features.

The air valve according to claim 7 is the air valve according to any one of claims 1 to 6 , wherein the upper surface inclined portion is a part of the insertion portion by being mounted. Features.

  The air valve according to the present invention can endure even when the pressure applied to the lid is very high, and the lid can be firmly fixed to the valve box by a simple operation.

It is sectional drawing (sectional drawing cut | disconnected in the position of the line shown by AA of FIG. 2) of the air valve which concerns on embodiment of this invention. It is a top view of an air valve same as the above. It is sectional drawing (sectional drawing cut | disconnected in the position of the line shown by BB of FIG. 2) of an air valve same as the above. It is sectional drawing (sectional drawing cut | disconnected in the position of the line shown by CC of FIG. 2) of an air valve same as the above. It is sectional drawing (sectional drawing cut | disconnected in the position of the line shown by DD of FIG. 2) of an air valve same as the above. FIG. 2 shows a valve box of the same air valve, in which (a) is a plan view and (b) is a cross-sectional view (a cross-sectional view cut along a line indicated by A′-A ′ in (a)). . The lower surface inclination part of an air valve same as the above is expanded and shown, Comprising: (a) is a bottom view, (b) is a front view, (c) is a front view of a modification. It is a top view which shows the state before fixing a cover body to a valve box in an air valve same as the above. Fig. 2 shows the lid of the air valve of the above, wherein (a) is a plan view and (b) is a cross-sectional view (a cross-sectional view cut along a line indicated by A "-A" in (a)). It is. The upper surface inclination part of an air valve same as the above is shown enlarged, (a) is a top view, (b) is a front view, (c) is a front view of the state which is going to insert, (d) is The front view of the insertion completion state, (e) The front view of a modification, (f) is the front view of the state immediately after insertion of a modification, (g) is the front view of an insertion completion state. It is sectional drawing which shows the packing for lid mounting of an air valve same as the above, and an auxiliary ring, Comprising: (a) is an auxiliary ring, (b) is packing for lid mounting. It is sectional drawing which shows the state which mounted | wore with the male nozzle | cap | die in the valve box of the air valve same as the above.

  Hereinafter, modes for carrying out the present invention will be described. The air valve 1 according to the embodiment of the present invention is connected to a water pipe through which tap water flows, and can discharge the air mixed in the water pipe to the outside through the large air hole 3a or the small air hole 4a. As shown in FIG. 1, the air valve 1 includes a valve box 2, a lid body 3, an idle valve body 4, and a float valve body 5 as a basic structure. The air valve 1 includes a valve body guide 6 and a cover body 7. 1 is a cross-sectional view taken along the line AA in FIG. FIG. 2 is a plan view illustrating the zenith portion 7 a of the cover body 7. 3 is a cross-sectional view taken along the line BB in FIG. 2, FIG. 4 is a cross-sectional view taken along the line C-C in FIG. 2, and FIG. Sectional drawing cut | disconnected in the position of the line shown by DD in FIG.

  The valve box 2 is connected to a water pipe, and has a valve box main body 21 and a plurality (two in this embodiment) of lid fixing parts 22 and 22 provided extending upward (see FIG. 6 (a), (b) etc.). Specifically, the valve box 2 has a vent 2a at the upper end of the valve box main body 21, a water inlet 2b at the lower end of the valve box main body 21, and a hollow part 2c inside the lower part of the vent 2a. The water guiding part 2d is provided below. In the present embodiment, the valve box 2 is provided with a large-diameter step 2e, a medium-diameter step 2f, and a small-diameter step 2g in order from the upper end on the upper part of the inner wall surface of the valve-box main body 21 (see FIG. 6 (a) and 6 (b)), the intermediate diameter step 2f becomes a packing arrangement portion for arranging a lid mounting packing 3A described later. The number or shape of the step portions on the inner wall surface of the valve box main body 21 is not limited to this. The valve box 2 is usually used by connecting a separate repair valve 10 having a cock portion for controlling the intrusion of water into the hollow portion 2c between the air valve 1 and the water pipe. Instead of the repair valve 10, a cock function may be provided near the water inlet 2 b of the valve box 2.

  The lid fixing part 22 is provided in a predetermined angular range (for example, a range of about 70 degrees) in the circumferential direction of the valve box main body part 21. The lid fixing portion 22 includes a side portion 22a and a protruding portion 22b that protrudes inwardly (inward in the radial direction) like a bowl from the top thereof. In the present embodiment, the number of lid fixing portions 22 is two, but the number of lid fixing portions 22 is not limited thereto. In addition, the magnitude | size of the lid fixing | fixed part 22 can be changed suitably.

  The lower surface 223 of the projection 22b is formed by a lower surface inclined portion 22c in which the lower surface 22ca is inclined (see FIG. 6B). The lower surface 22ca of the lower surface inclined portion 22c is inclined downward from the one end surface 221 side of the protrusion 22b toward the other end surface 222 side. In addition, in Fig.6 (a), the lower surface inclination part 22c is shown with the broken line. In this embodiment, the lower inclined portion 22c is made of a member different from the other portions of the valve box 2, and is attached and fixed with a screw 22d (see FIG. 7A) to fix a part of the protrusion 22b. It is said. As the screw 22d, for example, a flat head screw (a screw head having a flat top surface and a screw head embedded seating surface having a conical shape) can be used. This fixing is preferably performed with the screw 22d because the lower surface inclined portion 22c can be replaced as required, but may be performed by other mounting means such as welding or press-fitting. Further, the lower surface inclined portion 22c is not manufactured by another member, but is formed integrally with other portions by a cast, for example, cast iron, when the valve box 2 is manufactured, and the lower surface 223 of the projection 22b, that is, The lower surface 22ca of the lower surface inclined portion 22c can be inclined. In addition, when the lower surface inclined portion 22c is mounted and fixed using a countersunk head screw, the hole through which the countersunk head screw is inserted is a screw head embedding hole in order to improve the fit of the seating surface of the countersunk head screw. It is necessary to form a countersunk-shaped countersunk hole and to prevent the countersunk head screw from protruding when the countersunk head screw is tightened in the countersunk hole.

  As shown in FIG. 7A, the lower surface inclined portion 22c has a shape obtained by deleting the central portion of the fan shape in the bottom view. Further, as shown in FIG. 7B, the lower surface 22ca is inclined in front view.

  One end surface 221 of the protrusion 22 b is a surface on the side where a later-described insertion portion 3 c of the lid 3 is inserted by the rotation of the lid 3. The lower surface 22ca of the lower surface inclined portion 22c is a surface on which an upper surface 3c3, which will be described later, of the insertion portion 3c of the lid 3, that is, an upper surface 3da of the upper surface inclined portion 3d contacts and slides. In the present embodiment, as shown in FIG. 8, when the lid 3 is arranged at a position where the lid fixing portions 22 and 22 do not exist in the circumferential direction of the valve box 2, and the lid 3 is rotated clockwise, FIG. As shown in (and FIG. 1), the insertion part 3c is inserted. Accordingly, in FIG. 6B (and FIG. 7B), the lower surface 22ca of the lower surface inclined portion 22c is inclined downward (clockwise) from the left side to the right side.

  The lower surface 22ca of the lower surface inclined portion 22c may be coated with a resin such as Teflon (registered trademark) so as to slide smoothly with respect to the upper surface 3da of the upper surface inclined portion 3d. Moreover, when producing with the member different from the other part of the valve box 2, the lower surface inclination part 22c should be as smooth as possible, for example, the thing made from copper-type alloys, such as copper or brass. Can be used. Thus, when the lower surface inclined portion 22c is made of another member, the lower surface 22ca can be manufactured with higher accuracy than when the valve box 2 is manufactured and integrally formed with other parts using cast iron. If it is formed integrally with other parts of the valve box 2 (or only the lid fixing part 22) by copper or a copper-based alloy such as brass, the cost can be reduced.

  Note that the shape of the lower inclined portion 22c in plan view is not limited to the shape described above. In addition, it is preferable that the lower surface inclined portion 22c has the entire lower surface 22ca inclined because a large area in contact with the upper surface inclined portion 3d can be pressed firmly, but in some cases, as shown in FIG. In addition, only a part of the lower surface 22ca can be inclined. The same applies to the upper inclined portion 3d of the insertion portion 3c described later, which will be described later.

  The lid 3 is formed with the large air hole 3 a and is attached to the valve box 2. The large air hole 3 a is formed at a substantially central portion of the lid 3. Above the large air hole 3a is an intake / exhaust passage 3b. The lid 3 is mounted on the valve box 2 by placing a lid mounting packing 3A below the lid 3 and through the lid mounting packing 3A.

  The lid 3 has a plurality of insertion portions 3c and 3c (see FIGS. 9A and 9B). The insertion portions 3c and 3c are provided in a blade shape on the outer peripheral portion of the upper portion of the lid 3 and then outward (radially outward). The outer peripheral surface of the insertion part 3c is circular arc shape. In the present embodiment, the number of the insertion portions 3c is two, but the number of the insertion portions 3c is not limited to this. The number of insertion portions 3c is normally equal to the number of lid fixing portions 22. In addition, the magnitude | size of the insertion part 3c can be suitably changed based on the number etc. of the insertion part 3c.

  The upper surface 3c3 of the insertion portion 3c is formed by an upper surface inclined portion 3d in which the upper surface 3da is inclined (see FIG. 9B). The upper surface 3da of the upper surface inclined portion 3d is inclined upward from the one end surface 3c1 side of the insertion portion 3c toward the other end surface 3c2 side. In this embodiment, the upper surface inclined portion 3d is made of a member different from the other portions of the insertion portion 3c, and is attached and fixed with a screw 3j (see FIG. 10) as a part of the insertion portion 3c. As the screw 3j, for example, a flat head screw can be used. This fixing is performed with the screw 3j because the upper surface inclined portion 3d can be replaced as necessary, but it may be performed with other mounting means such as welding or press-fitting. Further, the upper surface inclined portion 3d is not manufactured by another member, but is formed integrally with other portions by casting, for example, cast iron when the lid body 3 is manufactured, and the upper surface 3c3 of the insertion portion 3c, that is, The upper surface 3da of the upper surface inclined portion 3d may be inclined. In addition, when attaching and fixing the upper surface inclined portion 3d using a countersunk head screw, the hole through which the countersunk head screw is inserted is a screw head embedding hole in order to improve the fit of the seating surface of the countersunk head screw. It is necessary to form a countersunk-shaped countersink hole and to prevent the countersunk head screw from protruding when the countersunk head screw is tightened in the countersunk hole.

  As shown in FIG. 10A, the upper surface inclined portion 3d has a shape obtained by deleting the central portion of the fan shape in plan view. Further, as viewed from the front, the upper surface 3da is inclined as shown in FIG.

  One end surface 3c1 of the insertion portion 3c is a surface on the side to be inserted below the lower surface inclined portion 22c of the protrusion 22b of the lid fixing portion 22. As described above, the upper surface 3da of the upper surface inclined portion 3d is a surface on which the lower surface 22ca of the lower surface inclined portion 22c of the projection 22b of the lid fixing portion 22 comes into contact and slides. In the present embodiment, as described above, when the lid 3 is arranged at a position where the lid fixing portions 22 and 22 do not exist in the circumferential direction of the valve box 2 and the lid 3 is rotated clockwise, the insertion portion 3c. Is inserted (see FIG. 8). In FIG. 9B (and FIG. 10B), the upper surface 3da of the upper surface inclined portion 3d is from right to left (counterclockwise). Inclined upward. FIG. 10C shows a state where the insertion portion 3c is about to be inserted, and FIG. 10D shows the upper surface inclined portion 3d in a state where the insertion of the insertion portion 3c is completed, together with the lower surface inclined portion 22c. The upper surface inclined portion 3d (that is, the lid 3) is lowered with respect to the lower surface inclined portion 22c (that is, the valve box 2) from the state where the insertion portion 3c is inserted to the state where the insertion of the insertion portion 3c is completed. Do (pressed down).

  The upper surface 3da of the upper surface inclined portion 3d may be coated with a resin such as Teflon (registered trademark) so as to slide smoothly with respect to the lower surface 22ca of the lower surface inclined portion 22c. Moreover, when producing with the member different from the other part of the insertion part 3c, the upper-surface inclination part 3d should be what slides as smoothly as possible, for example, the thing made from copper-type alloys, such as copper or brass Can be used. If the upper surface inclined portion 3d is made of another member in this way, the upper surface 3da can be manufactured with higher accuracy than the case where the lid body 3 is formed integrally with other portions using cast iron. If compared with the case where it is integrally formed with the other part of the lid 3 with a copper-based alloy such as copper or brass, the cost can be reduced.

  Note that the shape of the upper inclined portion 3d in plan view is not limited to the shape described above. Further, as described for the lower surface 22ca of the lower surface inclined portion 22c described above, it is preferable that the entire upper surface 3da of the upper surface inclined portion 3d is inclined, but in some cases, as shown in FIG. In addition, only a part of the upper surface 3da can be inclined. In this case, FIG. 10F shows a state immediately after the insertion portion 3c is inserted, and FIG. 10G shows a state where the insertion of the insertion portion 3c is completed.

  The lower surface inclined portion 22c of the protrusion 22b of the lid fixing portion 22 of the valve box 2 and the upper surface inclined portion 3d of the insertion portion 3c of the lid 3 are all of the lower surface 22ca of the lower surface inclined portion 22c and the upper surface 3da of the upper surface inclined portion 3d. If a part is inclined, an inclined portion of the lower surface 22ca of the lower surface inclined portion 22c is obtained by inserting and rotating the insertion portion 3c of the lid body 3 below the protrusion 22b of the lid fixing portion 22 of the valve box 2. The inclined portion of the upper surface 3da of the upper surface inclined portion 3d comes into contact with the lid 3 and the lid body 3 is lowered. Thereby, as will be described later, the lid 3 can press the lid mounting packing 3A from above with a desired pressure to ensure water-stopping and sealing performance.

  In the final insertion state, the lower surface 22ca of the lower surface inclined portion 22c and the upper surface 3da of the upper surface inclined portion 3d are in surface contact, and the surface contact area can be increased. Thereby, even if the set pressure of the air valve 1 is high (for example, 1.6 MPa or more), the lid 3 can be firmly fixed to the valve box 2. The protrusion 22b (the part other than the lower surface inclined part 22c) of the lid fixing part 22 of the valve box 2 and the insertion part 3c (the part other than the upper surface inclined part 3d) of the lid 3 are cast as described above, for example, Since it can be formed integrally with the valve box 2 or the other part of the lid 3 by cast iron, it can easily have a rigidity that can withstand the set pressure of the air valve 1. Further, the material of the lower inclined portion 22c and the upper inclined portion 3d needs to be able to withstand the set pressure of the air valve 1.

  The lid mounting packing 3A disposed below the lid 3 is made of an annular rubber (for example, an O-ring) (see FIG. 11B).

  It is preferable to provide an auxiliary ring 3B that reduces the sliding resistance caused by the rotation of the lid 3 on the upper side of the lid mounting packing 3A (see FIG. 1 and FIG. 11 and FIG. 11A). By providing the auxiliary ring 3 </ b> B, the lid 3 can be smoothly rotated with respect to the valve box 2. The material of the auxiliary ring 3B is not particularly limited, and a ring made of metal or resin can be used. A preferable material for the auxiliary ring 3B is, for example, a resin such as Teflon (registered trademark). The auxiliary ring 3B can prevent the lid mounting packing 3A and the lid 3 from sticking even when the air valve 1 is used for a long time without being disassembled by maintenance or the like.

  After the lid 3 is rotated and fixed to the valve box 2, the lid 3 is prevented by the reverse rotation prevention unit that prevents the lid 3 attached to the valve box 2 from rotating in the direction opposite to the insertion direction. 3 is preferably fixed to the valve box 2 more reliably. The reverse rotation prevention unit is provided in the lid 3 and / or the valve box 2 and the mechanism is not particularly limited, but the following can be used.

  That is, in the present embodiment, the lid 3 is provided with levers 3e and 3e that rotate in the vertical direction in the vicinity of the other end surface 3c2 of the insertion portion 3c (see FIG. 9A and FIG. 4), The box 2 is provided with lever housing grooves 2h and 2h that can house a part of the levers 3e and 3e (see FIG. 6A). At a position where the lid 3 can be rotated by a predetermined amount to be completely fixed to the valve box 2, the positions of the lever 3e and the lever receiving groove 2h are coincident with each other. Therefore, it is possible to prevent the attached lid 3 from rotating backward by storing a predetermined portion of the lever 3e in the lever receiving groove 2h at that position. In other words, it is possible to confirm that the lid 3 has been rotated by a predetermined amount to a position where it can be completely fixed to the valve box 2 by storing a predetermined portion of the lever 3e in the receiving groove 2h. It should be noted that the lever 3e may be freely swingable, or may be temporarily held in an up state or a down state. In this embodiment, two levers 3e and two lever housing grooves 2h are provided, but it is also possible to use one.

  Moreover, in this embodiment, the holding member 3f is attached to the cover body 3 so that the center part of the cover body 3 may be straddled (refer Fig.9 (a)). The gripping member 3f is used not only as a means for gripping the lid 3 but also as a means for rotating the lid 3 as described later.

  As shown in FIG. 9A, the handle member 3f can be provided with a handle cap 3g at substantially the center thereof. The handle cap 3g is a polygon, for example, a quadrangle. When the lid 3 is rotated and detached from the valve box 2, the end of an opening key (not shown) is inserted into the square and fitted, and the opening key is rotated, thereby the lid 3 Can be rotated. The air valve 1 is often provided in the basement of a road or the like. Therefore, depending on the work environment, there may be a situation in which it is difficult for the operator to squat down and hold the gripping member 3f. In such a case, by using the opening key, the lid 3 can be rotated without the operator working with an unreasonable posture.

  In the present embodiment, an O-ring 3h and an O-ring 3i are attached to the lid 3 (see FIG. 9B). The O-ring 3h can increase the water-stopping property and adhesion to the floating valve body 4, and the O-ring 3i can improve the water-stopping property and adhesion to the auxiliary ring 3B.

  The lid 3 can be variously deformed. For example, the insertion part 3c and the gripping member 3f of the lid 3 are rotatably attached to other parts of the lid 3, and the gripping member 3f and the insertion part are not rotated without rotating the other parts. It is possible to attach the lid 3 to the valve box 2 by rotating the 3c. Further, the lid 3 can be configured not to have the gripping member 3f. In this case, when the lid 3 is carried or rotated, the other part of the lid 3 is gripped. Or grip the lever 3e. Further, the lid 3 may be configured not to have the handle cap 3g. In this case, the lid 3 is rotated without using the opening key.

  The floating valve body 4 is disposed in the valve box main body 21 of the valve box 2 and can close the large air hole 3a of the lid 3 from below. The floating valve body 4 and the float valve body 5 described in detail later have a specific gravity smaller than that of water, and the floating valve body 4 is lighter than the float valve body 5.

  In the present embodiment, the floating valve body 4 has a substantially disk shape, and a valve seat 41 is provided at the center. The valve seat 41 protrudes slightly downward so as to be in close contact with the float valve body 5, and the lower surface is substantially flat and has elasticity. The small air hole 4a described above is formed in the center of the valve seat 41 so as to penetrate vertically.

  Further, the floating valve body 4 is formed with a recess 4b near the center of the lower end surface, and the recess 4b is formed so that the upper end 5a of the float valve body 5 can properly contact the valve seat 41. The upper end 5a of 5 is large enough to enter with a margin. Further, a through hole 4c is formed in the lateral direction so that air can pass between the outer peripheral surface of the floating valve body 4 and the recess 4b. Further, the floating valve body 4 has a convex portion 4 d formed at the center of the upper end surface thereof, and the convex portion 4 d is smaller than that so as to enter the large air hole 3 a of the lid body 3. .

  The float valve body 5 is disposed in the valve box main body 21 of the valve box 2. The float valve body 5 can block the small air hole 4a described above from below.

  In the present embodiment, the float valve body 5 is generally cylindrical in shape as a whole. Further, the upper end portion 5a is tapered in a truncated cone shape, and the upper end surface 5aa which is the tip thereof is substantially flat. The higher the flatness of the upper end surface 5aa, the easier it is to come into close contact with the valve seat 41 of the floating valve element 4. On the other hand, the upper end surface 5aa is in a fixed state with the valve seat 41, and may be difficult to leave. It may have a slight curvature.

  In the present embodiment, like the one disclosed in Patent Document 4, the float valve body 5 includes a float center portion 5A and a float peripheral portion 5B. This is a suitable form when the lateral width of the valve box 2 is increased and the size is increased so that the amount of exhaust required for large-volume exhaust can be increased. The float peripheral part 5B has a thick cylindrical shape having a central hole 5Ba around the central axis, and the float central part 5A has a substantially columnar shape and is inserted into the central hole 5Ba of the float peripheral part 5B. The upper end portion 5a described above is formed in the float center portion 5A. The float peripheral part 5B is heavier than the float central part 5A.

  Further, the lower end portion of the float center portion 5A has a diameter larger than that of the upper portion thereof, has a flange portion 5Aa, and forms a step 5Aaa. The center hole 5Ba of the float peripheral part 5B has a step 5Baa with a lower end part having a larger diameter than the upper part so that the flange part 5Aa can be fitted.

  The valve body guide 6 has a bottomed cylindrical shape and has a window hole 6a through which air and water can flow. The window hole 6a is provided at an appropriate position on the side and bottom. The idle valve element 4 and the float valve element 5 are arranged inward of the valve element guide 6, and the valve element guide 6 prevents their lateral displacement.

  The cover body 7 has a cylindrical shape having a zenith portion 7a, and from the upper side by fastening a nut 73 to a spacer 72 fixed to the lid fixing portion 22 from the lateral direction by a screw 71 with a handle. (See FIG. 5). In addition, the screw 71 with a handle can extract water or air from the hollow portion 2c of the valve box 2 when the air valve 1 is disassembled.

  The air valve 1 described above can be assembled as follows, for example, after disassembly. First, with the cock of the repair valve 10 closed, the valve body guide 6, the float valve body 5, and the floating valve body 4 are placed in the valve body body 21 of the valve box 2, and the lid body 3 is mounted. The lid 3 can be attached to the valve box 2 as follows.

  That is, first, the lid 3 is fitted into the vent 2a of the valve box body 21 of the valve box 2 (see FIG. 1 and the like). At this time, the gripping member 3f can be gripped. Then, the lid 3 is rotated (clockwise in this embodiment), and the insertion portions 3c and 3c of the lid 3 are connected to the projections 22b and 22b of the lid fixing portions 22 and 22 of the valve box 2. Plug in the bottom. Then, the upper surface 3da and 3da of the upper surface inclined portions 3d and 3d of the lid 3 come into contact with the lower surfaces 22ca and 22ca of the lower surface inclined portions 22c and 22c of the valve box 2, and the lid 3 is rotated with the rotation of the lid 3. Is pushed down. When the lid 3 is pushed down, the lid mounting packing 3A arranged on the lower side of the lid 3 is pressed and crushed with a desired pressure. As a result, water-tightness and sealing performance between the lid 3 and the valve box 2 are ensured, and water or air does not leak.

  In this way, the insertion portions 3c and 3c of the lid 3 are inserted under the projections 22b and 22b of the lid fixing portions 22 and 22 of the valve box 2, and the rotation is less than the 180 ° rotation of the lid 3. (In this embodiment, about 90 degrees), the lid 3 can be attached to the valve box 2 and fixed firmly by a simple operation. Moreover, since it can withstand the pressure applied to the cover body 3 by a wide surface between the insertion portions 3c and 3c and the projections 22b and 22b, it can withstand even if the pressure becomes very high.

  After the cover 3 is attached to the valve box 2, the cover body 7 is attached so as to cover the valve box 2.

  In addition, the air valve 1 can be used as a temporary fire hydrant or water supply, as described in Patent Document 3. For this purpose, a male die 3 'as shown in FIG. 12 is used.

  The male die 3 ′ can be connected to a female die that a fire hose, a stand pipe, an angle valve, or the like has, and the connecting portion (the upper portion of the male die 3 ′ in FIG. 12) is a general plug-in type. It is the same shape as the male base of (Machino style).

  The male base 3 ′ has the same structure for mounting on the valve box 2 as the lid 3. That is, the male die 3 ′ has the plurality of insertion portions 3 c and 3 c (not shown in FIG. 12) described above, and has upper surface inclined portions 3 d and 3 d. Note that the male die 3 'does not have the gripping member 3f and the handle cap 3g. The levers 3e and 3e are preferably provided.

  The procedure for mounting the male die 3 'is as follows. That is, first, the cock of the repair valve 10 is closed, and the cover body 7, the lid body 3, the floating valve body 4, the float valve body 5, and the valve body guide 6 are removed from the valve box 2. Subsequently, the male die 3 ′ is inserted into the valve box 2 in the same manner as the lid 3 described above. At this time, normally, the lid mounting packing 3A and the auxiliary ring 3B are arranged below the male die 3 '. In this state, when a fire hose having a female base is connected, it is possible to extinguish the fire. Similarly, when a stand pipe or an angle valve having a female base is connected, water can be supplied during a disaster. Further, when a pressure measuring instrument having a water stop pressure gauge coupled to a female die is connected, the water pressure can be measured. It is also possible to conduct an in-pipe investigation by inserting an in-pipe investigation camera or the like into the water pipe with the male base 3 ′ inserted into the valve box 2.

  The air valve according to the embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various designs within the scope of the matters described in the claims. It can be changed. Accordingly, the present invention can be applied to air valves having various shapes and structures other than the air valve 1 described above. For example, it can of course be applied to air valves of various shapes and structures in which small air holes are formed in the floating valve body as in Patent Documents 1, 3, and 4 above, and small as in Patent Document 2 above. The present invention can also be applied to air valves having various shapes and structures in which air holes are formed in the lid. Moreover, it is applicable also to the air valve of the structure which is not equipped with the structure which is not equipped with a valve body guide like patent document 1, or a cover body. Further, in the case where a lever for fixing the lid is attached to the valve box side as in Patent Documents 3 and 4, the lever may be configured as a reverse rotation preventing portion of the lid. In addition, a lock pin is provided on the valve box side as a reverse rotation prevention portion of the lid, and the lock pin comes into contact with the insertion portion of the lid inserted in the final position to prevent the lid from rotating. A lock pin mechanism may be used. Further, in the above-described embodiment, the lower surface 223 of the protrusion 22b and the upper surface 3c3 of the insertion portion 3c are formed to be inclined, but these inclinations press the insertion portion 3c from above when inserting the insertion portion 3c. This is because the force for pressing the lid mounting packing 3A downward is minimized. Therefore, only one of either the lower surface 223 of the protrusion 22b or the upper surface 3c3 of the insertion portion may be an inclined surface, and the other portion may be flat. In addition, both the lower surface 223 of the protrusion 22b and the upper surface 3c3 of the insertion portion 3c are made flat, and when rotating to insert the insertion portion 3c, the insertion portion 3c is pressed from above and the lid mounting packing 3A is moved downward. You may wear it while pressing. In this case, it is preferable to provide the auxiliary ring 3B on the lid mounting packing 3A so that it can rotate more smoothly. Alternatively, both the lower surface 223 of the protruding portion 22b and the upper surface 3c3 of the insertion portion 3c are made flat, and a slight gap (less than the pressing allowance of the lid mounting packing 3A) is provided between them, and the lever 3e is used by using this gap. After inserting the insertion portion 3c while gripping and rotating, when the lever 3e is accommodated in the lever accommodating groove 2h, it is attached while pressing the lid mounting packing 3A downward using the cam or lever principle. You may do it. Also in this configuration, the lid 3 can press the lid mounting packing 3A from above with a desired pressure to ensure waterproofness and sealing performance. In this case, it is preferable to provide the auxiliary ring 3B on the lid mounting packing 3A so that it can rotate more smoothly.

DESCRIPTION OF SYMBOLS 1 Air valve 2 Valve box 21 Valve box main-body part 2a Valve box vent 2b Valve box water flow port 2c Valve box hollow part 2d Valve box water conveyance part 2e Large diameter stage of valve box main-body part 2f Middle diameter stage of valve body (packing placement part)
2g Small diameter step of valve box main body of valve box 2h Lever receiving groove 22 Lid fixing part 22a Side part of lid fixing part 22b Projecting part of lid fixing part 221 One end surface of projecting part 222 Other end surface of projecting part 223 Lower surface of projecting part 22c lower surface inclined portion 22ca lower surface of lower inclined portion 22d screw 3 lid 3a large air hole 3b intake / exhaust passage 3c insertion portion 3c1 one end surface of insertion portion 3c2 other end surface of insertion portion 3c3 upper surface of insertion portion 3d upper surface inclination portion 3da upper surface inclination 3e lever 3f gripping member 3g handle cap 3h O ring 3i O ring 3j screw 3A lid mounting packing 3B auxiliary ring 3 'male die 4 idler valve element 4a small air hole 4b idler valve recess 4c idler valve element Through hole 4d Floating valve element 41 Valve seat 5 Float valve element 5a Float valve element upper end 5aa Float valve element 5A Float center part 5Aaa Float center part 5B Float center part 5B Float peripheral part 5Ba Float peripheral part central hole 5Baa Float peripheral part central hole step 6 Valve body guide 6a Valve body Guide window hole 7 Cover body 7a Zenith part of cover body 71 Screw with handle 72 Spacer 73 Nut 10 Repair valve

Claims (7)

An air valve connected to a water pipe through which tap water flows and capable of exhausting air mixed in the water pipe to the outside through a large air hole or a small air hole,
A valve box that is connected to the water pipe and has a valve box main body part and a plurality of lid fixing parts provided extending upward from the valve box body part,
The valve box body is mounted via a lid mounting packing, the large air hole is formed, and a lid having a plurality of insertion portions,
A floating valve body that is arranged in the valve box main body and can close the large air hole of the lid from below.
A float valve element disposed in the valve box body,
With
The small air hole is formed in the floating valve body or the lid body,
The float valve body can close the small air hole from below,
The lid body is attached to the valve box by turning the insertion portion into the lid fixing portion by rotation, so that the lid body descends and presses the lid mounting packing from above,
An air valve, wherein an auxiliary ring for reducing sliding resistance caused by rotation of the lid is provided on the upper side of the lid mounting packing. An air valve connected to a water pipe through which tap water flows and capable of exhausting air mixed in the water pipe to the outside through a large air hole or a small air hole,
A valve box that is connected to the water pipe and has a valve box main body part and a plurality of lid fixing parts provided extending upward from the valve box body part,
The valve box body is mounted via a lid mounting packing, the large air hole is formed, and a lid having a plurality of insertion portions,
A floating valve body that is arranged in the valve box main body and can close the large air hole of the lid from below.
A float valve element disposed in the valve box body,
With
In the floating valve body or the lid body, the small air hole is formed,
The float valve body can close the small air hole from below,
The lid body is attached to the valve box by turning the insertion portion into the lid fixing portion by rotation, so that the lid body descends and presses the lid mounting packing from above,
The lid body and / or the valve box has a reverse rotation prevention unit for preventing the lid body mounted on the valve box from rotating in the direction opposite to the insertion direction. . The air valve according to claim 2 ,
The reverse rotation preventing portion includes a lever that rotates in the vertical direction in the vicinity of the insertion portion in the lid body, and a lever housing groove that can accommodate a part of the lever in the valve box. An air valve characterized by. In the air valve according to any one of claims 1 to 3 ,
The lid fixing part has a side part and a protruding part protruding inward from the upper part thereof,
The lower surface of the protruding portion is formed by a lower surface inclined portion in which all or part of the lower surface is inclined downward from one end surface side to the other end surface side of the protruding portion,
The upper surface of the insertion portion is formed by an upper surface inclined portion in which all or part of the upper surface is inclined upward from one end surface side to the other end surface side of the insertion portion, and the one end surface of the insertion portion is the protrusion. An air valve, wherein the air valve is inserted into the lower end of the lower inclined portion at the one end surface of the portion. In the air valve according to any one of claims 1 to 4 ,
The air valve according to claim 1, wherein the lid body has a handle cap on a top surface of which the tip of the opening key is fitted. In the air valve according to any one of claims 1 to 5 ,
The air valve according to claim 1, wherein the lower inclined portion becomes a part of the protrusion by being attached. In the air valve according to any one of claims 1 to 6 ,
The air valve according to claim 1, wherein the upper inclined portion becomes a part of the insertion portion by being attached.

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