JP2015117827A - Air valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air valve capable of being used for cleaning a pipe, maintenance of a pipe conduit and a hydrant by exerting water conduction function without separately needing a base while having a function as the air valve for surely discharging the air inside, and keeping compactness while suppressing pressure loss by simplifying an internal structure.SOLUTION: A guide body 2 accommodating a float valve element 3 and a floating valve element 4 is disposed in a valve casing 1, a detachable cover 5 having a large air hole 12 and a base 15 is fixed to an upper opening portion 6 of the valve case 1 through proper fixing means 11, the detachable cover 5 and the guide body 2 accommodating the float valve element 3 and the floating valve element 4, are taken out from the opening portion 6 of the valve case 1 according to the necessity, and the detachable cover 5 having the large air hole 12 and the base 15 is fixed to the opening portion 6 of the valve case 1 in the taking-out state.

Description

  The present invention relates to an air valve that is used for discharging air mixed in a pipe by laying it in a water main or the like, and can be used for cleaning the pipe, maintenance of the pipe, a fire hydrant, and the like.

In pipes such as water mains, the effective cross-sectional area of pipes may decrease due to air bubbles or air pools, and pipe capacity may be reduced, so air valves are generally installed to prevent this. . Air valves are arranged at various places in the pipeline, and stable air supply and distribution and maintenance of the pipeline are possible by discharging the air in the pipeline. Usually, the air valve has a structure that can be disassembled, and its function is maintained by removing dust adhering to the inside or performing cleaning and inspection.
On the other hand, the air valve may be used for maintenance such as pressure measurement in a washing tube or a pipe, or may be used for a fire hydrant or the like. In this case, the air valve may be provided with a base.

  As this type of air valve, for example, the air valve of Patent Document 1 is disclosed. In this air valve, a floating valve body and a float valve body are arranged in the valve box so that they can be moved up and down, and an auxiliary hole is provided in the side wall of the valve box, and a fire hydrant with a ball valve (open / close valve) is attached to the auxiliary hole. It has been. In this air valve, it is possible to discharge air bubbles and air in the pipe line to the outside of the pipe, and open the on-off valve to supply pressure water to the outside through the fire hydrant from inside the valve box. .

On the other hand, for example, another part called a Machino-type base can be attached to the air valve, and the washing pipe and maintenance inside the pipe line can be performed through this base, and it can also be used as a fire hydrant. It has been known.
As such an air valve, for example, an air valve of Patent Document 2 is disclosed. In this air valve, a guide cylinder, a float valve body, and a floating valve body are housed in a storage chamber of the valve box, and a lid body is attached to the valve box so that air in the pipe can be discharged to the outside. When this air valve is used as a fire hydrant or the like, a base is prepared separately from the lid, the lid is removed from the valve box, and the base is attached to the valve box.

JP-A-10-169816 Japanese Patent No. 5158914

  However, since the air valve having the structure as in the former Patent Document 1 is provided with a fire hydrant from the side wall of the valve box, the fire hydrant has a curved shape. In this case, the pressure loss becomes large and a sufficient flow rate cannot be obtained, and it becomes difficult to wash and maintain the inside of the flow path. Due to the curved shape of such a fire hydrant and the fact that the fire hydrant is provided with an opening / closing valve, the overall size is increased, and installation in a narrow place is difficult. Furthermore, the internal structure is complicated by providing the on-off valve in the fire hydrant, and dust or the like is likely to adhere to the valve body of the on-off valve. For this reason, internal cleaning and inspection are required, but it is difficult to remove dust, etc., and if it cannot be removed, the flow rate during water flow will be reduced or the opening / closing function as an on-off valve will be fully demonstrated. There is also a risk that it will not be possible.

  On the other hand, in the air valve of the latter patent document 2, by providing a water passing function such as a fire hydrant by attaching and detaching the base, water is passed while suppressing pressure loss without requiring an on-off valve inside, Cleaning and inspection are possible by attaching and detaching the guide body, the float valve body, and the floating valve body. However, in order to give this air valve a water flow function, it is necessary to newly attach a base separate from the lid to the valve box, and it is necessary to prepare this base as a separate part. When attaching the base to the air valve, it is necessary to carry the base to the place where the air valve is installed and then attach it to the valve box, which is troublesome. On the other hand, when it is used as a normal air valve without using a base, since it is necessary to store the base, its management becomes troublesome.

  The present invention has been developed in order to solve the above-mentioned problems, and the object of the present invention is to have a function of reliably discharging the internal air while allowing water to flow without requiring a separate base. The purpose is to provide an air valve that can be used for washing pipes, maintenance of pipelines, fire hydrants, etc., simplifying the internal structure, maintaining compactness, and allowing water flow while suppressing pressure loss .

  In order to achieve the above object, the invention according to claim 1 is provided with a guide body containing a float valve body and an idle valve body in a valve box, and a large air hole is provided in an upper opening of the valve box. Fixing the detachable lid having the base through an appropriate fixing means, and if necessary, taking out the guide body containing the detachable lid, the float valve body and the floating valve body from the opening of the valve box, and It is an air valve in which a detachable lid having a large air hole and a base is fixed to the opening of the valve box in a taken-out state.

  The invention according to claim 2 is an air valve in which a large air hole of the detachable lid is provided in the base of the base, and this base is detachably fixed to the opening of the valve box via a fixing means.

  According to a third aspect of the present invention, the detachable lid is an air valve in which a ring body is provided on a base member having a large-diameter opening via a sealing material, and a large air hole is formed in the ring body.

  The invention according to claim 4 is an air valve in which the sealing material is provided between the lower surface of the base member and the upper surface of the ring body or between the side surface of the ring body and the inside of the valve box.

  The invention according to claim 5 detachably connects the lower part of the detachable lid having a large air hole and the upper part of the guide body via a temporary connecting part, and when the detachable cover is taken out from the valve box, It is an air valve that is pulled out at the same time in a state where the detachable lid is connected.

  The invention according to claim 6 is an air valve in which the detachable lid is covered with a cover body when used as an air valve.

  In the invention according to claim 7, a flange portion is provided on the outer periphery of the lower end of the cover body, the flange portion and an annular bracket fixed to the upper portion of the valve box are fixed on the outer peripheral side of the valve box, and the cover body is interposed via the bracket. This is an air valve attached to the valve box.

  According to an eighth aspect of the present invention, a small air hole penetrating vertically is formed at an eccentric position of a short cylindrical and flat floating valve body, and the float valve body is formed into a short cylindrical shape and a flat shape. It is an air valve.

  According to the ninth aspect of the present invention, a diameter-enlarged opening is formed from the inner peripheral diameter portion formed in the large air hole to the lower end inlet of the large air hole, and a gentle diameter-enlarged surface is formed toward the upper end outlet of the large air hole. Air valve.

  The invention according to claim 10 is the air valve in which the diameter-enlarged opening is formed by chamfering from the rounded inner peripheral diameter part toward the lower end inlet.

  According to the first aspect of the invention, while having the function of reliably discharging the air inside through the guide body that houses the float valve body and the floating valve body in the valve box, the upper opening of the valve box A detachable lid having a large air hole and a base is fixed, and if necessary, the guide body containing the detachable lid, float valve element and idler valve element is taken out from the opening of the valve box, and the valve box in the removed state By fixing the detachable lid to the opening of the tube, the water-passing function is demonstrated using the detachable lid without the need for a separate base, and for maintenance of pipes such as for washing tubes and pressure measurement, It can also be used as a temporary fire hydrant and the like, and when used as a normal air valve, there is no need to store the base part separately. The internal structure is simplified because there is no need for a water passage switching part inside, and since the valve box has a straight shape, water can flow smoothly with reduced pressure loss, and the overall compactness can be secured. Since the float valve body, the idle valve body, and the guide body can be easily attached and detached, cleaning and inspection are also easy, and the functionality of discharging air as an air valve or the functionality at the time of passing water as a fire hydrant or the like increases.

  According to the invention according to claim 2, by providing a large air hole integrally in the base of the base, air can be discharged while exhibiting a function as an air valve without providing another member in the base, and When the water flow function is exhibited, a sufficient flow rate can be secured for functioning as a washing pipe, pressure measurement, or fire hydrant through a large air hole.

  According to the invention of claim 3, when the cap member and the ring body are provided separately in the detachable lid and the large air hole is formed in the ring body, the float valve is used when the ring body is mounted and used as an air valve. The body and the idle valve body are regulated to exert an excellent air discharge function. On the other hand, by removing the ring body and attaching the detachable lid to the valve box, a flow path having a diameter larger than that of the large air hole is provided by the base member, so that a larger flow rate can be passed than when the ring body is mounted.

  According to the invention of claim 4, these can be mounted while closing the gap between the base member and the ring body, or the ring body and the valve box. When the float valve body and the floating valve body are provided inside, It can be accurately operated to reliably maintain the functionality as an air valve.

  According to the invention which concerns on Claim 5, the guide body which accommodated the float valve body and the floating valve body can be taken out integrally from a valve box by pulling out an attachment / detachment lid, and mounting | wearing to these valve boxes becomes easy. . By integrating the detachable lid and the guide body, there is no misalignment, and the float valve body and floating valve body can be operably provided while increasing the diameter of the large air hole, and the air valve function can be demonstrated. Therefore, water can be passed while reducing the pressure loss.

  According to the sixth aspect of the invention, when used as an air valve, the cover body covers the detachable lid to prevent entry of water such as dust and rainwater from the outside, and the function as an air valve Securing functionality such as water hydrant or fire hydrant.

  According to the invention which concerns on Claim 7, when connecting the connection site | parts, such as an external hose, by attaching the cover by the outer peripheral side of a valve box via an annular bracket, this external connection site | part becomes a bracket and a cover. Since there is no possibility of interfering with the connection part, it can be easily attached and detached while preventing the external connection part from being damaged.

  According to the eighth aspect of the present invention, when the internal air is discharged, the float valve element is prevented from adsorbing to the floating valve element, and the float valve element is reliably dropped from the idle valve element so that the floating valve element can be smoothly passed through the idle valve element. The entire valve can be made compact by reducing the weight of the float valve body and reducing the volume.

  According to the ninth aspect of the present invention, while providing the large-diameter opening portion side of the large air hole so as to be sealable by the idler valve body, the fluid is smoothly guided from the enlarged opening portion toward the inner peripheral diameter portion. By flowing fluid while preventing the occurrence of turbulent flow from the peripheral diameter part through the gently expanded surface, pressure loss is suppressed compared to straight large air holes, and fluid is exhibited while exhibiting excellent flow characteristics. Can flow.

  According to the invention of claim 10, by chamfering the enlarged diameter opening, the fluid can be smoothly guided to the enlarged diameter opening through the chamfer, and the idle valve is adjusted by adjusting the size of the chamfer. It is possible to reduce the pressure loss and improve the flow characteristics while providing the body on the periphery side of the enlarged diameter opening so as to be able to be sealed.

It is a longitudinal section showing a 1st embodiment of an air valve of the present invention. It is a longitudinal cross-sectional view which shows the state which removed the internal component of the air valve of FIG. It is the model top view which showed the fixed lid | cover. It is a perspective view which shows an idle valve body and a float valve body. It is a longitudinal cross-sectional view which shows 2nd Embodiment of the air valve of this invention. It is a longitudinal cross-sectional view which shows 3rd Embodiment of the air valve of this invention. It is a longitudinal cross-sectional view which shows 4th Embodiment of the air valve of this invention. FIG. 8 is a separated sectional view of the air valve of FIG. 7. It is a longitudinal cross-sectional view which shows the state which removed the internal component of the air valve of FIG. It is a longitudinal cross-sectional view which shows 5th Embodiment of the air valve of this invention. It is a longitudinal cross-sectional view which shows the attachment / detachment lid | cover of the air valve of FIG. It is the graph which compared the flow volume from a nozzle | cap | die at the time of water flow.

  Hereinafter, embodiments of an air valve according to the present invention will be described in detail with reference to the drawings. FIG. 1 shows a first embodiment of the air valve of the present invention. In FIG. 2, the internal components are removed from the air valve of FIG. Is shown.

  As shown in FIG. 1, the air valve of the present invention has a valve box 1, a guide body 2, a float valve body 3, an idle valve body 4, a detachable lid 5, and a fixed lid 7. The air valve is provided, for example, in a pipe line of a water main (not shown), and is provided so as to be able to discharge air due to air bubbles or air pools contained in tap water. Particularly preferable air valve installation locations are the topmost part when the laying gradient of the pipe line changes, the central part of the water pipe line, and the pipe at regular intervals (for example, 300 to 500 m) with respect to the straight horizontal pipe line. There are places where air supply and exhaust are required before and after the main valve of the road.

  The valve box 1 is made of, for example, ductile cast iron. In the valve box 1, for example, a float valve body 3 made of resin such as ebonite and an idle valve body 4 made of resin such as polypropylene are accommodated. A guide body 2 made of resin such as resin is disposed, and an opening 6 is formed above the valve box 1. A metal detachable lid 5 such as a CAC 406 is always fixed to the opening 6 via appropriate fixing means 11. The detachable lid 5 has a large air hole 12 and a base 15. Is provided. In this air valve, the guide body 2 containing the detachable lid 5, the float valve body 3, and the floating valve body 4 is taken out from the opening 6 of the valve box 1 as necessary, and the valve box 1 in the removed state A detachable lid 5 having a large air hole 12 and a base 15 is fixed to the opening 6.

  The valve box 1 is formed in a substantially cylindrical shape, an opening 6 is provided in the upper part, an inflow port 20 is provided in the lower part, and a storage chamber 21 is provided between them. A fitting portion 22 having a diameter smaller than that of the opening 6 is formed on the opening 6 side of the valve box 1, and an annular groove 23 is formed in the upper portion of the fitting portion 22. A U-packing 24 made of, for example, a cylinder material is attached to the annular groove 23. A step portion 25 is provided between the opening 6 and the fitting portion 22, and a thrust ring 26 is attached to the step portion 25, and a screw 28 of the bolt member 27 is screwed on the upper surface of the opening 6. Female screws 29 for attachment are provided at a plurality of locations by centering.

  The inflow port 20 at the lower part of the valve box 1 is provided so as to ensure a predetermined inflow area, and a predetermined inflow area of the inflow port can be secured around the inflow port 20, for example, approximately 90 °. Protrusions 30 are formed protruding at intervals. The protrusion 30 is provided on the inner diameter side of the diameters of the float valve body 3 and the floating valve body 4, and the float valve body 3 and the idle valve body 4 are locked to the protrusion 30, so that these drops are prevented. A flange 31 is provided at the lower outer periphery of the valve box 1, and a repair valve (not shown) or the like is detachably provided via the flange 31.

  The storage chamber 21 is provided with an inner diameter capable of storing the guide body 2, and a guide pedestal 32 for placing the guide body 2 projects inwardly at a lower portion of the storage chamber 21. A plurality of side guides 33 project from the inner peripheral side of the storage chamber 21, and the side guides 33 can have a suitable height that can contact the outer periphery of the guide body 2 so that the guide body 2 can be guided in a centered state. Is provided.

  The guide body 2 has an upper portion disposed on the lower surface of the detachable lid 5, and a lower side provided so as to be able to be placed on the guide pedestal 32. While being housed in 21, it is mounted with a play (not shown) between the detachable lid 5 and the guide base 32. A plurality of communication portions 35 for communicating fluid are formed in the upper portion of the guide body 2, and a hole 36 having a predetermined diameter is provided at a substantially central position on the bottom surface side. The communication portion 35 is provided at equal intervals by a plurality of cutout portions, and the area when the fluid passes is determined by the communication portion 35.

  4 shows a perspective view of the float valve body 3 and the floating valve body 4 shown in FIG. As shown in the separated perspective view of FIG. 4 (a), the float valve element 3 and the floating valve element 4 are both short cylindrical and provided in a flat shape, and as shown in the stacked state in FIG. In the state where the floating valve body 4 is disposed above the float valve body 3 in the body 2, each is detachably provided.

  A small air hole 37 penetrating vertically is formed at an eccentric position of the floating valve body 4, and air can move through the small air hole 37 of the eccentric structure. On the upper surface side of the floating valve body 4, a seal ring 38 that can contact and seal against the lower surface 5 a of the detachable lid 5 when the floating valve body 4 floats is mounted. The float valve body 3 and the floating valve body 4 receive a buoyancy according to the water level in the valve box 1 and are guided by the guide body 2 and can move smoothly up and down. It is discharged outside the air valve.

  The detachable lid 5 shown in FIGS. 1 and 2 is provided separately from the base 15, and the base 40 of the base 15 is fitted to the opening 6 of the valve box 1 via the fixing means 11 and attached or detached. Freely fixed. The base 15 is provided by, for example, a 65A Machino type base, and is attached to the detachable lid 5 via an O-ring 41. Thereby, the base 15 is always attached to the valve box 1 via the attachment / detachment lid 5, and is attached / detached as necessary when cleaning or checking internal parts.

  A large air hole 12 is formed through the center of the base 40 of the base 15, and a fluid such as air is provided in the valve box 1 through the large air hole 12 so as to be able to suck and discharge. The large air hole 12 is provided with a diameter smaller than that of the opening portion of the guide body 2, for example, a diameter of about φ42 mm on the inlet side and smaller than the floating valve body 4, whereby the large air hole 12 is provided in the floating valve body. 4 is blocked and water is stopped. In this case, the entrance side of the large air hole 12 may have a smaller diameter than the opening portion of the guide body 2, and the shape is not particular.

  The base 15 belongs to, for example, a firefighting hose coupling fitting (not shown), and if it is the above-mentioned Machino type fitting, it is configured using a fitting 16 and a push ring 17 as shown in FIG. Each of the insert 16 and the push ring 17 is made of a metal such as stainless steel, for example. The push ring 17 is attached to an outer circumferential groove 18 formed between the outer periphery of the metal fitting 16 and the detachable lid 5 to which the metal fitting 16 is screwed. The upper end of the detachable lid 5 constituting the outer peripheral groove 18 has a function of holding the position of the push wheel 17 corresponding to a retaining ring that determines the lower position of the push wheel 17. An operation space for the push ring 17 is formed between the push ring 17 held at the upper end of the detachable lid 5 and the fixed lid 7. When the fire hose is removed from the base 15, the operator can remove the hose by putting his hand in the operation space and pushing up the push ring 17.

  The base 15 is not necessarily provided separately from the detachable lid 5, and may be provided integrally. In this case, in addition to integrally forming the base and the detachable lid, for example, the detachable lid and the base are provided so as to be capable of being assembled by screwing or fitting, and the O-ring 41 is attached or attached between them. In an omitted state, these may be sealed with an adhesive. In this case, since the role of the large air hole 12 is required in the base 15 and a water stop portion that is blocked by the floating valve body 4 is required, the entrance side is reduced to about 42 mm as in the case of a separate body. It is necessary to provide a large air hole with a diameter.

The guide body 2 is not directly fixed to the detachable lid 5 by using bolts or the like, and the guide body 2 can be detached from the valve box 1 together with the float valve body 3 and the idle valve body 4 at the time of removal.
At that time, if necessary, the guide body 2 containing the detachable lid 5, the float valve body 3 and the floating valve body 4 is taken out from the opening 6, and the large air hole 12 and The detachable lid 5 having the base 15 can be fixed.

  1 and 3, the fixing means 11 includes a step portion 25 provided in the valve box 1, an arm engagement piece 50 provided in the fixed lid 7, a guide portion 52, a stopper 53, a lock pin device (lock pin). 54, and the detachable lid 5 is detachably provided on the valve box 1. The arm engagement pieces 50 are formed on the side surface of the detachable lid 5 so as to protrude at equal intervals, and are provided so as to be able to contact the step portion 25. Although not shown, the arm engagement piece 50 is formed at different inclination angles on the front and rear sides, and has a gently inclined surface on one side and a steeply inclined surface on the other side. With these different inclination angles, the detachable lid 5 can be rotated while moving the lock pin 54 in the immersive direction on the gently inclined surface, while the lock pin 54 is completely inner on the steeply inclined surface. The detachable lid 5 cannot be rotated by projecting to the side and engaging both.

  The lock pin 54 is attached to the valve box 1 and is provided so as to engage with the detachable lid 5 by a biasing force of a spring (not shown) so that the detachable lid 5 can be mounted in a predetermined positioning state. The lock pin 54 is grasped with a finger and pulled outward to unlock the detachable lid 5. By rotating the detachable lid 5 in this state, the detachable lid 5 can be detached from the valve box 1. Yes.

  The fixed lid 7 shown in FIG. 3 is provided so as to be attachable to the upper surface 1a of the valve box 1 so that the detachable lid 5 can be positioned and fixed. A hole 55 is formed at the center of the fixed lid 7, and the detachable lid 5 can be inserted into the hole 55. A through hole 56 is formed at a position corresponding to the female screw 29 of the fixed lid 7. A notch-shaped guide portion 52 through which the arm engagement piece 50 passes is formed in a part of the hole portion 55, and a stopper 53 protruding downward is formed following the guide portion 52. Thus, the rotation range of the detachable lid 5 is set.

  The fixing lid 7 is placed on the valve box upper surface 1a, and the bolt member 27 is fixed to the valve box 1 by screwing the screw 28 from the through hole 56 to the female screw 29. In this case, the fixing lid 7 is fixed in a state in which the misalignment is prevented by the centering process of the female screw 29.

  As shown in FIG. 1, a cover body 60 is attached to the upper portion of the valve box 1. The cover body 60 is made of, for example, a metal such as stainless steel, is formed in a shape that can surround the upper portion of the valve box 1, and is attached and detached so as to cover the large air hole 12 of the attachment / detachment lid 5 and the atmosphere. It is detachably provided on the upper part of the lid 5 or the upper part of the valve box 1. Although not shown, a bolt hole portion into which the head 62 of the fixing bolt 61 can be inserted / removed is formed on the top surface of the cover body 60, and the bolt hole that can lock the head portion 62 is formed following this bolt hole portion. A slot-shaped guide hole that is narrower than the portion is formed. The cover body 60 is fixed to the valve box 1 and placed on the bolt member 27 serving as a support column, and the fixing bolt 61 is screwed to the female screw portion 65 formed on the bolt member 27 through the guide hole portion. It is attached by doing. Thereby, when using as an air valve, the detachable lid 5 covers the large air hole 12 and the outside air in a state where the guide body 2, the float valve body 3, and the floating valve body 4 are disposed in the lower part. Covered by the body 60.

  Although not shown, an opening / closing cock communicating with the inside may be provided on the side surface of the valve box 1. The cock is provided to release the residual pressure when the air valve is disassembled, and the opening state of the small air hole 37 of the floating valve body 4 can be confirmed by this cock. When the small air hole 37 is clogged with dust or the like and becomes in an abnormal state such as a blockage, the air accumulates in the valve without being discharged, so that the abnormality can be confirmed by discharging the air by opening the cock. . On the other hand, when the small air hole 37 is not closed normally, the valve is filled with water and is working normally, so that when the cock is opened, water is discharged and this normal state can be confirmed. .

  Further, a repair valve (not shown) may be attached to the lower part of the valve box 1 of the air valve so as to exert the water passing function. In this case, the repair valve may be any commonly used one, and for example, a ball valve can be used. In this case, the ball valve stem can be opened and closed by turning 90 °. For example, the ball valve is attached to the flange 31 with a mounting bolt, but the ball valve may be attached to a portion other than the flange. When a ball valve is used, it is desirable that the ball diameter is substantially the same as the diameter of the internal flow path of the air valve.

  Furthermore, by rotating the detachable lid 5 to the valve box 1 to which the fixed lid 7 is fixed, the guide body 2 containing the detachable lid 5, the float valve body 3, and the floating valve body 4 is attached and detached. The guide body 2 and the like may be accommodated by other attachment / detachment structures of the attachment / detachment lid. For example, although not shown, an integrated detachable lid having a concave engagement groove, an engagement portion engageable with the engagement groove, and a valve box having a rotatable lever having an operation portion are provided. With the detachable lid temporarily attached, the lever is rotated to engage the engaging portion with the engaging groove in the press contact state, or the lever is rotated from this state to separate the engagement from the engaging groove. Thus, the detachable lid temporarily attached with the guide body containing the float valve element and the idle valve element can be attached to and detached from the valve box. With the attachment / detachment structure of the engaging portion and the engaging groove by such a lever, these can be attached / detached with one touch. When a gasket or an O-ring is attached between the attachment / detachment lid and the guide body, A gasket, an O-ring, or the like can be attached and detached together with the attaching / detaching lid and the like. Also in this case, the base and the detachable lid can be provided integrally as described above.

  The air valve is provided in a pipe line of the water main, and discharges air contained in the tap water. However, the target fluid may be a liquid other than tap water, and any excess contained in the liquid is included. Air can also be discharged. This air valve is suitable for, for example, washing tube work, pressure measurement, and temporary water supply.

Next, the operation and action of the air valve of the present invention in the above embodiment will be described.
In the air valve of the present invention, a guide body 2 in which a float valve body 3 and a floating valve body 4 are housed in a valve box 1 is disposed, and a large air hole 12 and a base are formed in an upper opening 6 of the valve box 1. The guide body 2 in which the detachable lid 5, the float valve body 3, and the floating valve body 4 are accommodated as necessary is fixed to the detachable lid 5 having the detachable lid 15 via the appropriate fixing means 11. Since it is taken out from the opening 6 of the box 1 and the detachable lid 5 having the large air hole 12 and the base 15 is fixed to the opening 6, an opening / closing valve is provided in the valve box 1 or the valve box 1 is large-sized. It is possible to exhibit the air valve function and the water flow function such as a fire hydrant without increasing the number of parts and preventing the internal structure from becoming complicated. In this case, as shown in FIG. 1, when the guide body 2 containing the float valve body 3 and the floating valve body 4 is disposed in the valve box 1, the function of the air valve is exhibited, as shown in FIG. Furthermore, when the detachable lid 5 is fixed to the valve box 1 with the float valve body 3, the floating valve body 4, and the guide body 2 taken out of FIG.

  When removing the float valve body 3, the floating valve body 4, and the guide body 2 from the air valve, first, the flow path from the flowing water path to the air valve is shut off. At this time, since there is residual pressure in the air valve, the detachable lid 5 is pushed up and brought into close contact with the bottom surface side of the fixed lid 7, and the rotation is prevented. If the cock (not shown) provided in the valve box 1 is opened from this state, the residual pressure in the air valve is released, and the push-up force to the detachable lid 5 is released, so that disassembly is possible.

  Next, the cover body 60 is removed from the valve box 1. In this case, after loosening the fixing bolt 61 and loosening the cover body 60, the cover body 60 is rotated so that the bolt hole is aligned with the position of the head 62 of the fixing bolt 61, and the cover body 60 is moved in this state. It can be removed by pulling upward.

  When removing the detachable lid 5, the detachable lid 5 is rotated by a predetermined angle in the take-out direction while grasping and pulling the lock pin 54 to release the locking to the steeply inclined surface. In this case, the rotation is smooth by being supported by the thrust ring 26 in a state where the arm engagement piece 50 is in contact with the step portion 25. When the steeply inclined surface of the arm engaging piece 50 comes into contact with the stopper 53 of the fixed lid 7, it can be removed by pulling up the detachable lid 5. At this time, since the guide body 2 can move up and down in the storage chamber 21, the attachment / detachment lid 5 can be easily attached and detached.

  By removing the detachable lid 5, the floating valve body 4, the float valve body 3, and the guide body 2 can be detached from the valve box 1, and by extracting the guide body 2 upward, the float valve body 3 and the floating valve body 4. At the same time, it can be extracted. In this state, the disassembled parts may be removed, cleaned or inspected. During the cleaning and inspection, it is not necessary to remove the fixed lid 7.

  When attaching the detachable lid 5 to the valve box 1, the float valve body 3 and the floating valve body 4 are accommodated in the guide body 2, the guide body 2 is inserted through the opening 6, and then the detachable lid 5 is attached to the valve box. 1, the detachable lid 5 is inserted while aligning the position of the arm engaging piece 50 and the guide portion 52, and the detachable lid 5 is rotated by a predetermined angle in a direction in which the arm engaging piece 50 is engaged with the stopper 53. Let By this rotation, the lock pin 54 is automatically moved in the immersion direction by the gently inclined surface of the arm engagement piece 50. When the detachable lid 5 reaches the set position, the steeply inclined surface reaches the position of the lock pin 54, so that the lock pin 54 protrudes by the urging force of the spring and engages with the steeply inclined surface side. At this time, since the gently inclined surface collides with the side surface portion of the stopper 53, the arm engagement piece 50 is sandwiched and held from both sides.

  Thus, the guide body 2 that houses the float valve body 3 and the floating valve body 4 together with the detachable lid 5 is mounted at a predetermined position of the valve box 1. When the arm engagement piece 50 is engaged with the stopper 53, the base 40 is fitted into the fitting portion 22, and the detachable lid 5 is prevented from being detached from the valve box 1. After the attachment / detachment lid 5 is attached, leakage between the valve box 1 and the attachment / detachment lid 5 is prevented by attaching the U packing 24 to the outer periphery of the base 40. The detachable lid 5 is attached to and detached from the fixed lid 7 by rotating within a range of 60 °, for example.

  When used as an air valve, first, in FIG. 1, when there is no water in the valve box 1, the float valve body 3 and the floating valve body 4 are lowered to open the large air hole 12, and from this state, rapid exhaust is performed. Or rapid inspiration. In this case, the float valve body 3 and the floating valve body 4 are both short cylindrical and flat, so that the contact resistance with respect to the inner periphery of the guide body 2 is reduced, and the float valve body 3 and the floating valve body 4 are surely dropped.

  The rapid exhaust is an operation for rapidly exhausting a large amount of air in the pipe line through the large air hole 12 when filling a pipe of a water main pipe (not shown). At the time of rapid exhaust, since the floating valve body 4 and the float valve body 3 are both positioned below the guide body 2 without being lifted, the large air hole 12 is fully opened. Thereby, the air in a pipe line is efficiently discharged | emitted outside via an air valve.

The rapid intake is an operation when a large amount of intake air is rapidly taken into the pipeline via the air valve when water in the pipeline is discharged. At the time of quick intake, the floating valve body 4 and the float valve body 3 are in a lowered state. In this case, the large air hole 12 is opened, and the air is efficiently sucked from the large air hole 12 so that the drainage in the pipe is quickly performed. At this time, water accumulated in the guide body 2 is also drained from the hole 36. During this rapid intake, the float valve body 3, the floating valve body 4, and the guide body 2 do not rise.
By these rapid exhaust and rapid intake, operations such as initial water supply to the water main and drainage from the water main can be performed in a short time.

  When the filling of the air valve is completed and the inside of the pipe line is full and the inside of the valve box 1 is filled with water, the float valve body 3 and the floating valve body 4 rise by buoyancy, and the floating valve The seal ring 38 of the body 4 is in close contact with the lower surface 5 a of the detachable lid 5 to close the large air hole 12, and the float valve body 3 closes the small air hole 37 of the floating valve body 4. As a result, the inside of the valve box 1 is completely shielded, and the outflow of water to the outside is prevented.

  Under the pressure at the time of filling, the air mixed in the water main pipe gradually gathers in the air valve and accumulates in the valve box 1. When this air amount reaches a certain level, only the float valve element 3 is first lowered, and the small air hole 37 of the floating valve element 4 is opened. This is because the floating valve body 4 does not separate from the lower surface 5a of the detachable lid 5 having the large air holes 12 due to the size relationship between the large air holes 12 and the small air holes 37. As a result, the float valve body Only 3 descends due to its own weight.

  At this time, as shown in FIG. 4, the small air hole 37 of the floating valve body 4 is arranged at the eccentric position of the float valve body 3, so that first, the opposite of the small air hole 37 where the negative pressure is generated. The float valve body 3 is applied with a tilting force, and the float valve body 3 has a short cylindrical shape and a flat shape as described above, so that the contact resistance to the inner periphery of the guide body 2 is reduced. Few. From these things, the float valve body 3 becomes easy to incline with respect to the floating valve body 4, and it can detach | separate from the floating valve body 4 and can be reliably fall | descended. Thereby, adsorption | suction with the float valve body 3 and the floating valve body 4 is prevented, and the air in an air valve can be smoothly discharged | emitted from the small air hole 37 of the opened floating valve body 4 outside. Furthermore, by forming the corner portion on the lower side of the float valve body 3 in a rounded shape, the float valve body 3 is more easily inclined and is easily lowered.

  When the amount of air in the valve box 1 decreases due to the discharge of air, the float valve body 3 rises and closes the small air holes 37 again. By repeating the above operation, the air accumulated in the main pipe through the air valve is automatically discharged out of the valve.

  In this case, as described above, the guide body 2 is mounted with the guide base 32, the side guide 33, and the detachable lid 5 surrounded by the upper, lower, left, and right sides, so that the center of the valve box 1 is hardly displaced. Since the force is evenly received at the upper part of the cylindrical part, for example, when compared with a guide body provided with a collar part for pinching on the upper side (not shown), bending stress is less likely to be applied, and it is extremely resistant to impact loads such as water hammer. It has a strong shape.

  When the air valve is used for washing pipes or as a temporary fire hydrant, the detachable lid 5 having the base 15 is attached to the valve box 1 from which the float valve body 3, the floating valve body 4, and the guide body 2 are extracted. In this case, the detachable lid 5 is inserted from above the valve box 1, and the detachable lid 5 is inserted and rotated by a predetermined angle while aligning the positions of the arm engagement piece 50 and the guide portion 52. By this rotation, the lock pin 54 is automatically moved in the immersion direction by the gently inclined surface of the arm engagement piece 50. When the detachable lid 5 reaches the set position, the steeply inclined surface reaches the position of the lock pin 54, so that the lock pin 54 protrudes by the urging force of the spring and engages with the steeply inclined surface side. At this time, since the gently inclined surface collides with the side surface portion of the stopper 53, the arm engagement piece 50 is sandwiched and held from both sides.

By attaching the detachable lid 5 having the base 15 to the valve box 1 in this way, a water flow function is provided by the large air hole 12 of the detachable lid 5 without requiring a new base different from the removable cover 5. Can be demonstrated. Therefore, there is no need to carry another part to the place where the air valve is installed, and the air valve and the fire hydrant can be easily switched by attaching / detaching the float valve body 3, the floating valve body 4, and the guide body 2 to / from the valve box 1. Can be used.
At this time, in comparison with the fact that the pressure loss is large in a fire hydrant having a general ball valve structure, the flow path of the air valve of this embodiment is a straight structure, so that when used for a fire hydrant, etc. Pressure loss can be reduced.

  A hose or the like can be connected to the base 15 of the detachable lid 5, and the inside of the pipe line can be washed through this hose or used as a temporary fire hydrant. Further, it can be used for various purposes such as measurement of water pressure in the pipeline. When the detachable lid 5 is attached and used as a fire hydrant or the like, the base 15 can secure a flow rate equivalent to, for example, a fire hydrant of the Japan Water Works Association Standard JWWA B 103 (water supply underground fire hydrant).

  Furthermore, when a ball valve is provided on the flange 31 as a repair valve, a valve suitable for washing pipes or temporary fire hydrants can be provided while securing a flow path by opening and closing the repair valve. At this time, by providing the guide pedestal 32 at the lower part of the valve box 1, the jet flow flowing through the repair valve hits the guide pedestal 32 and is prevented from being directly ejected outside the valve.

  In the above embodiment, the example of the air valve in which the flange 31 is integrally provided in the lower part of the air valve has been described. However, the cock for opening and closing the flow path and the ball valve are integrally provided in the lower part of the air valve. There may be an air valve, an air valve called a so-called cocked air valve, and in this case, the same function as described above can be exhibited.

  FIG. 5 shows a second embodiment of the air valve of the present invention. In the following embodiments, the same portions as those in the above-described embodiments are denoted by the same reference numerals, and the description thereof is omitted. In this embodiment, the detachable lid 70 includes a base member 72 having a large diameter port 71, a sealing material 73, and a ring body 74, and the ring body 74 is provided on the base member 72 via the sealing material 73. A large air hole 75 is formed in the ring body 74.

  The ring body 74 is provided with an outer diameter that is substantially the same as the outer diameter of the detachable lid 70, for example, with the same resin material as the floating valve body 4, and the inner diameter of the large air hole 75 is provided, for example, at 42 mm. In this case, since the ring body 74 is used when used as an air valve, the large air hole 75 is formed to have an inner diameter that can be stopped by the floating valve body 4. The ring body 74 is not fixed to the valve box 1, is guided by the inner periphery of the valve box 1, and is disposed so as to be movable up and down. When the detachable lid 70 is used for a fire hydrant, washing tube, etc., the minimum inner diameter of the flow path at this time can be obtained by removing together with the above-mentioned components (float valve body 3, floating valve body 4, guide body 2) that are normally removed. Can be used as, for example, an inner diameter φ57 mm of a 65A cap, and can be used with a larger flow rate.

  In this air valve, an annular groove 76 is formed on the upper surface 74 a of the ring body 74, and a sealing material 73 made of an O-ring is attached to the annular groove 76. With this sealing material 73, a gap between the lower surface 72 a of the base member 72 and the upper surface 74 a of the ring body 74 is closed.

FIG. 6 shows a third embodiment of the air valve of the present invention. In this embodiment, the detachable lid 80 includes a base member 72 having a large diameter port 71, a sealing material 83, and a ring body 84, and the base member 72 is provided with a ring body 84 via the sealing material 83. A large air hole 85 is formed in the ring body 84.
In this air valve, a concave circumferential groove 86 is formed at the position of the valve box 1, and a sealing material 83 made of U packing is attached to the concave circumferential groove 86. The sealing material 83 closes a gap between the side surface of the ring body 84 and the inside of the valve box 1.
In addition, in the air valve of FIG. 5, FIG. 6, although the cover body is abbreviate | omitted, what is necessary is just to mount | wear suitably as needed.

  As shown in FIGS. 5 and 6, even when the ring body is provided with a large air hole, the base and the detachable lid can be formed integrally as in the case described above, and the engaging portion by the lever is engaged. The attachment / detachment lid can be provided in a structure that can be attached / detached to / from the valve box with a single touch by the attachment / detachment structure with the groove.

  7 to 9 show a fourth embodiment of the air valve of the present invention. In this embodiment, as shown in FIG. 7, temporary connection portions 93 and 94 made of, for example, uneven portions that can be temporarily fixed to each other are provided at the lower portion of the removable lid 91 having the large air holes 90 and the upper portion of the guide body 92. The detachable lid 91 and the guide body 92 are detachably connected via the temporary connection portions 93 and 94. Then, as shown in FIG. 8, when the detachable lid 91 is taken out from the valve box 1, the guide body 92 and the detachable lid 91 are simultaneously pulled out in this connected state by this connection.

  Thus, by providing the detachable lid 91 and the guide body 92 so that they can be taken out simultaneously, the guide body 92, the float valve body 3, and the floating valve body 4 can be easily attached and detached, and the float valve body 3 and the floating valve body 4 can be used. The function of the air valve can be demonstrated. In this case, the temporary connection between the guide 91 and the guide body 92 of the detachable lid 91 is ensured by the temporary connecting portions 93 and 94, so that the center of the detachable lid 91 and the guide body 92 is not shifted so that the diameter of the large air hole 90 is increased. As shown in FIG. 9, the pressure loss when the float valve body 3, the floating valve body 4, and the guide body 92 are taken out to exhibit a water passing function such as a fire hydrant can be further reduced.

  FIG. 10 shows a fifth embodiment of the air valve of the present invention. In this embodiment, a rounded inner peripheral diameter portion 102 is formed on the inner peripheral side of the large air hole 101 of the detachable lid 100, and the minimum diameter portion of the inner peripheral diameter portion 102 is the diameter of the large air hole 101. A diameter-enlarged opening 104 is provided from the inner peripheral diameter portion 102 to the lower end inlet 103 of the large air hole 101, and a gentle diameter-expanded surface 106 is formed toward the upper end outlet 105 of the large air hole 101. Yes.

  The enlarged diameter opening 104 is chamfered 107 from the inner peripheral diameter portion 102 toward the lower end inlet 103, and is formed so as to gradually increase in diameter from the inner peripheral diameter portion 102 toward the lower end inlet 103. The

  The chamfer 107 is preferably an R chamfer, but may be provided by a C chamfer. In any case of providing the chamfer 107 of any shape, the opening side of the enlarged-diameter opening 104 is made smaller than the seal diameter of the seal ring 38, and the center of the floating valve body 4 is biased by the amount of play. Even if it is centered, it is necessary to form the seal ring 38 so that it can contact and seal the lower surface 100a of the detachable lid 100.

  Since the chamfer 107 is provided in this manner, in the detachable lid 100 shown in FIG. 11, the opening-side inner diameter d1 of the diameter-enlarged opening 104 is larger than the inner diameter d2 of the inner-periphery-diameter 102, thereby expanding. The area on the diameter opening 104 side is larger than the area of the inner diameter part 102, and the fluid flows from the diameter expansion opening 104 side to the inner diameter part 102 through the chamfer 107. Furthermore, since the fluid flows smoothly from the inner peripheral diameter portion 102 through the gentle enlarged diameter surface 106, pressure loss is suppressed. In this case, in particular, pressure loss at low pressure is reduced, noise is suppressed, and excellent flow characteristics are ensured even though the inner peripheral diameter portion 102 is narrowed by the chamfer 107. When the chamfer 107 is provided, the relationship between the size of the chamfer 107 and the diameter of the inner peripheral diameter portion 102 is appropriately set so as to reduce pressure loss and ensure a predetermined flow rate.

  Further, in this embodiment, a flange portion 111 is provided at a position where the lock pin 54 on the outer periphery of the lower end of the cover body 110 in FIG. 10 can be concealed, and the cover body 110 is an attachment member via the flange portion 111. A bracket 112 is provided on the upper portion of the valve box 1 so as to be attachable. The bracket 112 is formed in a substantially annular shape by a thin plate, and projecting portions 113 bent downward in a substantially L-shaped cross section are formed at two locations on the outer periphery thereof. Further, the flange portion 111 of the cover body 110 has a function of covering and protecting an opening / closing cock communicating with the inside on a side surface of the valve box 1 (not shown).

  The bracket 112 is disposed on the fixed lid 7 above the valve box 1, and is positioned and fixed to the valve box 1 with a bolt member 27 together with the fixed lid 7. In this state, the flange portion 111 is placed on the projecting portion 113 to position the cover body 110 on the upper portion of the valve box 1, and the flange portion 111 and the distal end side of the projecting portion 113 are screwed together with a screw 114. Thus, the cover body 110 is fixed on the outer peripheral side of the valve box 1 via the bracket 112, and the upper side of the valve box 1 can be covered with the cover body 110.

  When the cover body 110 is attached to and detached from the valve box 1 using the bracket 112, it is not necessary to provide the bolt member for fixing the cover body 110 as a support on the attachment / detachment lid 110. Therefore, after removing the cover body 110, it is possible to avoid the possibility of causing troubles when connecting or removing the fire hose to the base 15 or the like. For example, when a female fire hose (not shown) is connected to the male Machino-type cap 15, the female-type receiving port is large on the outer diameter side. However, in the case of a structure for attaching and detaching the cover body 110 using the bracket 111, this interference can be avoided. Furthermore, since the flange portion 111 is fixed at a position where the lock pin 54 is hidden, the weather resistance can be improved even when the lock pin 54 is made of resin.

  Here, in this embodiment, in order to compare the flow rate due to the difference in the size of the chamfer 107 of the detachable lid 100, the flow rate of the detachable lid having large air holes of different shapes was measured. As these attachment / detachment lids, in FIG. 12, a flange-integrated attachment / detachment lid (hereinafter referred to as φ40 × φ44 chamfering) having an inner diameter φ40 mm of the inner peripheral diameter portion 102 (large air hole 101) and a chamfer 107 of φ44 mm in the enlarged diameter opening 104 ), A flange-integrated detachable lid (hereinafter referred to as φ40 × φ42 chamfer) having a chamfer 107 of φ42 mm in the enlarged diameter opening 104 and an inner peripheral diameter portion 102 of an inner diameter of φ40 mm; Water under each water pressure of an integrated detachable lid (hereinafter referred to as φ44 chamfer) and a φ75 mm fire hydrant (hereinafter referred to as JWWA B 103 fire hydrant) of Japan Water Works Association Standard JWWA B 103 (underground fire hydrant for water service) for comparison. The result of comparing the flow rates is shown. The reason why the inner diameter of the inner peripheral diameter portion 102 (large air hole 101) of the detachable lid 100 is 40 mm is that when the large air hole 101 of this size and the chamfer 107 are combined, more excellent flow characteristics can be obtained. This is because.

  From the graph of FIG. 12, when the enlarged opening 104 is provided at the lower end inlet 103 of the large air hole 101 and the gently enlarged surface 106 is provided toward the upper end outlet 105 of the large air hole 101, Even in this case, the pressure loss at low pressures can be suppressed, and the flow rate can be significantly reduced as compared with a fire hydrant, while providing excellent flow characteristics over the whole, and it has a sufficient function as a fire hydrant. Was confirmed.

  When comparing φ40 × φ44 chamfering and no φ44 chamfering, the flow rate of φ40 × φ44 chamfering is larger than that without φ44 chamfering for the same operating pressure. From this, when the diameter on the fluid inlet side is the same, the detachable lid having the chamfer 107 has a large air hole (inner peripheral diameter portion) having a smaller diameter, but the straight large air hole without chamfering. The pressure loss can be suppressed as compared with the detachable lid, and the flow rate can be increased for the same operating pressure. In other words, when a detachable lid is provided, when using as an air valve, the seal ring 38 of the floating valve element 4 is kept to a diameter that can be tightly sealed, while at the time of use as a fire hydrant, pressure loss is further suppressed to ensure a large flow rate. In order to achieve this, it has been confirmed that it is more desirable to have a chamfered shape.

  Further, when φ40 × φ44 chamfering is compared with φ40 × φ42 chamfering, the flow rate of φ40 × φ44 chamfering is larger than φ40 × φ42 for the same operating pressure. Therefore, when the large air holes 101 have the same diameter, it is possible to secure a larger flow rate by increasing the chamfer 107 and increasing the opening side of the enlarged diameter opening 104.

DESCRIPTION OF SYMBOLS 1 Valve box 2 Guide body 3 Float valve body 4 Floating valve body 5 Detachable lid 6 Opening part 11 Fixing means 12 Large air hole 15 Base 37 Small air hole 40 Base 60 Cover body 71 Large diameter port 72 Base member 73, 83 Sealing material 74 Ring body 93, 94 Temporary connection portion 100 Detachable lid 102 Inner peripheral diameter portion 103 Lower end inlet 104 Expanded opening portion 105 Upper end outlet 106 Expanded surface 107 Chamfer 111 Flange portion 112 Bracket

Claims (10)

  A guide body containing a float valve body and a floating valve body is disposed in the valve box, and an attaching / detaching lid having a large air hole and a base is provided at an upper opening portion of the valve box via appropriate fixing means. The guide body containing the detachable lid, the float valve body, and the floating valve body is taken out from the opening portion of the valve box, and the opening portion of the valve box in the removed state is fixed. An air valve characterized in that the detachable lid having the large air hole and the base is fixed to the air valve.   The air valve according to claim 1, wherein a large air hole of the detachable lid is provided in a base portion of the base, and the base portion is detachably fixed to an opening portion of the valve box through the fixing means.   2. The air valve according to claim 1, wherein the detachable lid is configured by providing a ring body with a seal member on a base member having a large-diameter opening, and the large air hole is formed in the ring body.   The air valve according to claim 3, wherein the sealing material is provided between a lower surface of the base member and an upper surface of the ring body or between a side surface of the ring body and the inside of the valve box.   A lower part of the detachable lid having the large air hole and an upper part of the guide body are detachably connected via a temporary connecting portion, and the guide body and the detachable cover are removed when the removable cover is taken out from the valve box. 2. The air valve according to claim 1, wherein the air valve is pulled out at the same time in a connected state.   The air valve according to any one of claims 1 to 5, wherein the detachable lid is covered with a cover body when used as an air valve.   A flange portion is provided on the outer periphery of the lower end of the cover body, the flange portion and an annular bracket fixed to the upper portion of the valve box are fixed on the outer peripheral side of the valve box, and the cover body is connected to the valve via the bracket. The air valve according to claim 6 attached to a box.   8. A small air hole penetrating vertically in the eccentric position of the floating valve body having a short cylindrical shape and a flat shape, and the float valve body is formed in a short cylindrical shape and a flat shape. The air valve according to claim 1.   9. The method according to claim 1, wherein a large-diameter opening surface is formed from an inner peripheral diameter portion formed in the large air hole to a lower end inlet of the large air hole and a gentle diameter increasing surface toward the upper end outlet of the large air hole. The air valve according to any one of the above.   10. The air valve according to claim 9, wherein the enlarged diameter opening portion is formed by chamfering from a rounded inner peripheral diameter portion toward the lower end inlet.

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