JP2004176836A - Intake/exhaust valve gear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To compatibly provide disposing capability of effluent and high intake/exhaust capability of air in an intake/exhaust valve arranged in a piping top part. <P>SOLUTION: A lid body 4 of a casing 1 connected to the piping top part for inputting and outputting water is provided with a large inlet/outlet 6 opened and closed by vertical movement of a floating body 21, a connection port 13 of a guide passage facing from its upper one side toward an outer side and guiding the effluent to a predetermined portion, and an opening 17 provided throughout a whole upper outer circumferential area of the large inlet/outlet 6 excluding the connection port 13 and exposing the large inlet/outlet 6 to the atmosphere. Massive intake and exhaust of air is made possible by the opening 17 with a large area provided throughout a substantially whole circumference of the lid body 4. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a suction / exhaust valve device provided at the top of a pipe for performing negative pressure destruction of a pipe such as water supply and hot water supply and air discharge.
[0002]
[Prior art]
For example, if a pressure boosting direct connection system that does not use a water receiving tank is adopted for the water supply system of a high-rise apartment house, an intake valve and an exhaust valve will be installed at the top of the vertical piping to protect the piping equipment and stabilize the water supply. It is necessary. The intake valve sucks air in order to prevent the pressure in the pipe from dropping due to temporary water cutoff, pump accident, etc., and prevent the upper part of the vertical pipe from becoming negative pressure, thereby causing the reverse siphon phenomenon. Further, the exhaust valve is for discharging the air accumulated in the pipe over time and the internal air at the time of initial water flow.
[0003]
Instead of providing the intake valve and the exhaust valve as separate products which are independent from each other as described in, for example, Japanese Patent Application Laid-Open No. 5-44867, a compact device is provided as an integrated product. As one form of this, a float is accommodated in a casing connected to and connected to a pipe, and the float is lowered at a low water level in the casing to form a valve-open state to discharge air. In some cases, the valve closing state is formed when the pressure rises to close the pipe.
[0004]
In other words, Japanese Patent Application Laid-Open No. Sho 60-11785 discloses a float-type intake / exhaust valve in which an intake valve and an exhaust valve are integrated, and a valve provided on a diaphragm on which a spring whose load changes according to the rise and fall of the float acts. A large intake / exhaust port is opened and closed by a body, and a small intake / exhaust port is opened / closed by a valve provided on a float. When the float moves down, both the large intake and exhaust ports and the small intake and exhaust ports are opened to rapidly introduce or exhaust air, and when the float rises, the large intake and exhaust ports are closed first and then the small intake and exhaust ports. The mouth is closed. However, this is a structure in which the top surface of a casing containing a float and a spring is covered with a diaphragm, and a lid body having two large and small intake / exhaust ports is disposed above the casing, so that not only is the assembly troublesome, There is a problem that maintenance such as inspection, cleaning and replacement of internal parts is not possible unless the diaphragm is removed, and that reassembly is extremely difficult.
[0005]
Japanese Patent Application Laid-Open No. Hei 9-189367 discloses an intake / exhaust valve of the type described above, in which a large intake / exhaust port is opened / closed by a valve body which rises and falls integrally with a float, and a small intake / exhaust valve provided on the valve body by rotation of the float. It is described that the mouth is opened and closed. This intake / exhaust valve keeps the large intake / exhaust port in an appropriate open state by the balance between the own weight of the valve element, the float, the float receiver and the spring force, but when the water level rises, the large intake / exhaust port is closed first, and then the small intake / exhaust port is closed. The intake / exhaust port is closed, the small intake / exhaust port opens when air accumulates, and the large intake / exhaust port opens when a negative pressure is generated. However, this is intended to prevent water outflow and water hammer by the balance of the water level, the pressure, the vertically moving member that moves up and down, and the spring, and it is extremely difficult to make the opening and closing timing proper. And the fact that the valve element and the float receiver are integrated so that there is a problem in the internal maintenance.
[0006]
Further, Japanese Patent Application Laid-Open No. 2001-235047 discloses an intake / exhaust valve of the type described above, in which the large intake / exhaust port and the small intake / exhaust port are both opened at the lowered position of the float forming the two valve bodies, and the float rises. First, the large intake and exhaust ports are closed, then the small intake and exhaust ports are closed, and when air accumulates, the small intake and exhaust ports are opened, and when a negative pressure is generated, both the large intake and exhaust ports and the small intake and exhaust ports are opened. Is described. However, this has a problem that it is difficult to properly set the height positional relationship between the two valve body portions formed on the float and the two intake / exhaust ports formed on the lid.
[0007]
Further, Japanese Patent Application Laid-Open No. 2002-22043 discloses an intake / exhaust valve of the type described above, in which an idle valve element, a float valve element having a heavy specific gravity and a float having a light specific gravity are vertically arranged, and a large intake / exhaust valve is provided at a float lowering position. When the float and the small intake and exhaust ports are both opened and the float rises, the floating valve element first closes the large intake and exhaust port, then the floating valve element closes the small intake and exhaust port provided on the floating valve element, and air accumulates And a small intake / exhaust port are opened, and when a negative pressure is generated, both the large intake / exhaust port and the small intake / exhaust port are opened. However, in order to make the floating operation of the floating valve element by the float and the opening / closing operation of the small intake / exhaust port by the float and the floating element to be performed properly using the specific gravity difference between the float and the float valve element, There is a problem in design and manufacturing that it is necessary to strictly set the specific gravity, that is, the respective weights and the shapes of the overlapping surfaces.
[0008]
In addition, none of the conventional intake / exhaust valves considers a countermeasure in the event that water leaks due to a poor valve closing or the like. It becomes. Japanese Patent Application Laid-Open No. 2000-170936 describes that a conduit for guiding effluent water to a drain or the like is provided. However, since intake and exhaust are also performed through this conduit, a large amount of air is absorbed and exhausted in a short time. In order to do this, it is necessary to prepare a conduit having a larger diameter than necessary.
[0009]
[Problems to be solved by the invention]
The present invention is based on the point that the conventional intake / exhaust valve having an intake function and an exhaust function is integrated, in particular, that there is no rational means for achieving both the treatment of the effluent and the securing of the intake / exhaust capability. In addition to the above, the assembly and disassembly of the conventional intake and exhaust valves are cumbersome, and therefore, there is a difficulty in maintenance, the size and shape of each part, and the setting of the specific gravity of parts and the like. Has been made to solve the problem that it is troublesome and difficult, comprising means for guiding effluent water to an outflow groove and means for sucking and discharging a large amount of air in a short time, It is another object of the present invention to provide a simple structure that can be easily assembled and disassembled and can be easily maintained, and that can properly perform intake and exhaust.
[0010]
[Means for Solving the Problems]
The present invention has a float accommodated in a casing connected to the top of the pipe, and an intake / exhaust port for opening and closing the float by opening and closing to introduce air into the casing or discharge air accumulated in the casing. With respect to the intake / exhaust valve device, the first problem of achieving both the treatment of the effluent and the securing of the intake / exhaust capability has been solved as follows.
[0011]
That is, a lid that covers the top end of the casing is provided with an intake / exhaust port, and the lid is provided from one upper side to the outside of the intake / exhaust port, and is a connection port that connects a conduit that guides outflow water to a predetermined location. And an opening that is provided over substantially the entire outer peripheral area except for the connection port of the intake / exhaust port and that opens the intake / exhaust port to the atmosphere.
[0012]
As described above, since almost the entire outer peripheral region except for the connection port of the conduit is opened to the atmosphere without closing the outer periphery of the lid, the treatment of the effluent can be performed accurately, and at the same time, a large area can be obtained. The object of forming an opening and introducing or discharging a large amount of air in a short time so as to have high suction and exhaust capability is achieved.
[0013]
In addition to the first problem, the present invention has a second problem that it has a simple structure that is easy to assemble and disassemble and that facilitates maintenance, and furthermore, performs intake and exhaust properly. The solution was as follows.
[0014]
That is, the intake / exhaust port is composed of two, a large intake / exhaust port and a small intake / exhaust port. A large intake / exhaust port is provided on a lid which is detachably attached to the casing so as to cover the top end. A connection port is provided on the body from the upper side of the large intake / exhaust port to the outside and connects the conduit that guides the effluent water to a predetermined location, and almost the entire outer peripheral area above the large intake / exhaust port except for the connection port. And a large air intake / exhaust port opened to the atmosphere. On the other hand, the small intake / exhaust port is provided in the projection plane of the large intake / exhaust port, and the large intake / exhaust port is opened / closed. A floating body having a small valve element for opening and closing the mouth, which is vertically movable, is housed in a casing so as to be vertically movable.
[0015]
By removing the lid, the upper surface of the casing is opened to allow the floating body to be taken in and out. By removing the large valve body, the upper surface of the guide cylinder is opened, and the floating body is a cartridge equipped with an opening and closing mechanism for two intake and exhaust ports. Accordingly, the object of having a simple structure that can be easily assembled and disassembled and that is easy to maintain is achieved. In addition, the guide tube and the float move up and down integrally or separately due to buoyancy or internal pressure, thereby achieving the purpose of easily performing proper intake and exhaust.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Although the present invention is applied to a single intake and exhaust port, an embodiment having two large and small intake and exhaust ports will be described with reference to the drawings. 3, a lid 4 sandwiches an O-ring 5 and hermetically seals and screw-fits into a cylindrical casing 1 having a bottom and an open upper surface having a short tubular mounting portion 2 with a male screw projecting from the lower end. It is detachably attached. The mounting portion 2 connects the suction / exhaust chamber 3 inside the casing 1 and the inside of the pipe by screwing and connecting to the top of the pipe of tap water or hot water.
[0017]
The lid 4 is provided with a large intake / exhaust port 6 having a large diameter at the center, generally about half the diameter of the casing 1, and the large intake / exhaust port 6 protrudes from the periphery toward the intake / exhaust chamber 3. A large valve seat 7 and a mounting edge 8 protruding upward. The mounting edge 8 is provided with an annular groove 9 opened on the outer peripheral surface.
[0018]
The lid 4 includes a cover member 10 that covers the large intake / exhaust port 6. The cover member 10 has a downward annular connecting edge 11 fitted to the mounting edge 8 and an upper cover plate 12 covering an upper area of the large intake / exhaust port 6, and is directed outward from one side above the large intake / exhaust port 6. And a rising edge 14 integral with the connecting edge 11 and protruding above the upper end surface of the large intake / exhaust port 6.
[0019]
A set screw 15 is screwed into the connecting edge 11 with its tip protruding into the ring groove 9. The cover screw 10 is detachably attached to the lid 4 by the set screw 15, and the cover member 10 is Is rotatable with respect to the lid 4. As a result, assembly and disassembly of the lid 4 and the cover member 10 can be easily performed, and the connection port 13 can be directed to an arbitrary direction. For this reason, when water overflows from the casing 1 due to a poor valve closing or the like, a conduit having a simple shape is used without complicatedly bending or lengthening a conduit for guiding the effluent to a predetermined location such as a drain. Thus, the connection can be made independently of the attachment of the casing 1 to the pipe.
[0020]
The bottom surface of the connection port 13 is located at substantially the same height as the upper end surface of the large intake / exhaust port 6, and the rising edge 14 protruding upward therefrom has the entire periphery of the large intake / exhaust port 6 excluding the connection port 13. Are provided. The outer peripheral line portion of the upper cover plate 12 integrally has a side cover plate 16 which is projected downward to the outer region of the rising edge 14 and bent downward, and a connection between the rising edge 14 and the side cover plate 16 is formed. An annular downward portion excluding the portion where the port 13 is provided forms an opening 17 for opening the large intake / exhaust port 6 to the atmosphere. The rising edge 14 guides the effluent to the connection port 13 without discharging the effluent from the opening 17 to the atmosphere, and does not cause troubles such as corrosion of building structures and equipment and water leakage into the room. In addition, the downward opening 17 eliminates the risk of rainwater or the like flowing in the case of outdoor installation.
[0021]
A strainer 19 is provided in an air flow path 18 extending from the opening 17 inside the cover member 10 to the large intake / exhaust port 6 so as to surround the upper area of the large intake / exhaust port 6, and the valve is closed when the intake is performed. Consideration is made so that solid foreign matter such as dust which causes a defect does not enter the intake / exhaust chamber 3.
[0022]
According to the lid 4 according to the present embodiment as described above, the large intake / exhaust port 6 can be formed to be sufficiently large, and the opening 17 provided over substantially the entire peripheral area around the large intake / exhaust port 6 can also have an arbitrary size. Since it can be formed, a large amount of air can be sucked and exhausted in a short time, and pressure release and negative pressure destruction of the suction and exhaust chamber 3 can be performed quickly and accurately.
[0023]
Next, the floating body 21 is vertically movably housed in the intake / exhaust chamber 3 of the casing 1. The floating body 21 has upper and lower ends open, and a lower end opening 23 has a receiving piece 24 in which a crosspiece for preventing a float 31 described later from falling is laid in a cross shape so that water and air can freely enter and exit. The opening has a cylindrical guide tube 22 which is closed by detachably fitting a large valve element 26 therein, and a float 31 which is housed vertically in the guide tube 22. The guide cylinder 22 has a plurality of guide ridges 25 extending in the vertical direction on the outer peripheral surface at appropriate intervals in the circumferential direction, and the guide ridges 25 are substantially inscribed in the peripheral wall 1 </ b> A of the casing 1 and move up and down without tilting. At the same time, water and air can freely enter and leave the gap with the casing 1.
[0024]
The large valve body 26 has a contact surface 27 on the upper surface in contact with the downward seating surface of the large valve seat 7, and a small valve seat 28 is fixedly held inside the contact surface 27 by vertically penetrating therethrough. The small valve seat 28 has a small intake / exhaust port 29 that communicates the inside of the guide cylinder 22 with the upper space of the casing 1 and the large intake / exhaust port 6.
[0025]
The float 31 accommodated in the guide cylinder 22 moves up and down without tilting by making the uneven flanges 31A and 31B provided at both upper and lower ends substantially inscribed in the peripheral wall 1A of the casing 1 without tilting. Freely pass through the recesses of the flanges 31A and 31B.
[0026]
A lever 33 is engaged with a hook 32 provided on the upper surface of the float 31, and a small valve element 34 is attached to a tip of the lever 33. A spring member 36 engaged with the lower surface of the large valve seat 26 is connected to the small valve element 34. The small valve is moved in accordance with the vertical movement of the float 31 around the position where the spring member 36 is engaged with the large valve seat 26. The body 34 rotates, and its upward contact surface 35 contacts the downwardly facing seat surface of the small valve seat 28 or is separated at an angle.
[0027]
The guide cylinder 22, the large valve element 26, and the float 31 are made of a material having a low specific gravity, and are provided with a small valve seat 28, a hook 32, a lever 33, and a small valve element 34 which are generally made of metal. It comes to float.
[0028]
In the floating body 21 according to the present embodiment as described above, the spring member 36 is engaged with the large valve body 26 and the lever 33 is engaged with the hook 32 to connect the large valve body 26 with the float 31. , The float 31 is inserted into the guide cylinder 22, and the large valve body 26 is fitted therein. Then, the floating body 21 is housed in the casing 1 and the lid 4 is mounted thereon, thereby obtaining the intake / exhaust valve device shown in the figure. The intake / exhaust valve device can be removed and disassembled in the reverse procedure.
[0029]
That is, according to the present embodiment, the spring member 36 is disengaged from the large valve body 26, the large valve body 26 is fitted into or pulled out of the guide cylinder 22, and the lid 4 is turned on and off the casing 1. It is possible to assemble and disassemble with extremely simple handling, so that maintenance such as inspection, repair and replacement of each part can be easily performed. If the small valve element 34 is mounted on the float 31 and does not engage with the large valve element 26 to be moved linearly, assembly and disassembly are further simplified.
[0030]
FIGS. 4A, 4B, 4C, and 4D are schematic diagrams illustrating the operation of the intake and exhaust valve device shown in FIGS. When the flow of water is started, or when the flow of water is resumed from a state in which the water level in the pipe has been lowered due to water cutoff, the guide cylinder 22 rides on the bottom wall 1B of the casing 1 as shown in FIG. 6, the float 31 rides on the receiving piece 24 at the bottom of the guide tube 22 to open the small suction / exhaust port 29. Therefore, a large amount of air in the pipe is discharged into the atmosphere through the opening 17 and the connection port 13 in a short time with the passage of water. (A) shows a state in which water has entered the bottom of the intake / exhaust chamber 3 of the casing 1, but the floating body 21 comes into contact with the bottom wall 1B by its own weight, and discharges the air in the casing 1 to the atmosphere.
[0031]
When the water level in the intake / exhaust chamber 3 rises, the floating body 21 starts to rise by buoyancy. In this embodiment, the float 31 inside the guide tube 22 is made to have a larger volume and generate a larger buoyancy than the cylindrical guide tube 22. Then, the large valve body 26 of the guide cylinder 22 closes the large intake / exhaust port 6. This state is shown in (B), where air is sealed in the upper part of the intake / exhaust chamber 3 and the water is in an equilibrium state with a high water level. In this state, the outflow of air and water is prevented, and the water flow in the pipe is performed normally.
[0032]
The air mixed into the water flow in the pipe mainly enters the guide tube 22 of the suction / exhaust chamber 3 installed at the top of the pipe. When this air gradually accumulates and the internal pressure increases, the water inside is pushed out and lowers the water level, and the float 31 descends to open the small suction / exhaust port 29, thereby reducing the accumulated air. The air is slowly discharged from the intake / exhaust port 29 to the atmosphere through the large intake / exhaust port 6. This state is shown in (C), and the large intake / exhaust port 6 is closed without the guide cylinder 22 descending. When the internal pressure decreases, the water level rises again, and the float 31 rises to close the small intake / exhaust port 29, thereby returning to the state shown in FIG. In other words, by repeating (B) and (C) and discharging only the accumulated air without causing water to flow out, normal water flow through the pipe can be maintained.
[0033]
When the water level in the pipe drops due to water cutoff and the like, and the water in the casing 1 returns to the pipe, a negative pressure is generated. However, when the intake / exhaust chamber 3 becomes empty, the floating body 21 descends, and the guide tube 22 is The large suction / exhaust port 6 is opened on the bottom wall 1 </ b> B and the float 31 opens the small suction / exhaust port 29 on the receiving piece 24 of the guide cylinder 22. For this reason, a large amount of air is sucked and introduced into the pipe through the opening 17 and the connection port 13 through the suction / exhaust chamber 3 in a short time, and the negative pressure can be destroyed to prevent the reverse siphon phenomenon. (D) shows the state at this time, and when the flow of water is resumed, the state returns to the state of (B) via the state of (A).
[0034]
As described above, according to the present embodiment, it is possible to accurately perform intake and exhaust by an extremely simple mechanism that utilizes the own weight of the floating body 21 and the buoyancy difference between the guide cylinder 22 and the float 31 constituting the floating body 21. Can be.
[0035]
When water overflows from the intake / exhaust chamber 3 through the large intake / exhaust port 6 due to poor valve closing, the outflow water is guided to the connection port 13 without being discharged from the opening 17 by the rising edge 14, and is connected to the conduit 13. And is discharged to a predetermined location.
[0036]
【The invention's effect】
As described above, according to the present invention, it is possible to treat water that overflows and flows out due to a valve closing failure or the like, and to inhale and exhaust a large amount of air in a short time to complete initial water passage in a short time, or to apply a negative pressure when water is cut off. Can be quickly destroyed. In addition to this, assembly and disassembly are simple, maintenance is easy, and accurate intake and exhaust can be performed.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.
FIG. 2 is a sectional view taken along the line AA in FIG. 1;
FIG. 3 is a sectional view taken along the line BB of FIG. 1;
FIGS. 4A, 4B, 4C, and 4D are schematic diagrams illustrating the operation of the embodiment shown in FIG.
[Explanation of symbols]
Reference Signs List 1 casing, 4 lid, 6 large intake and exhaust port, 10 cover body, 13 connection port, 14 rising edge, 17 opening, 21 floating body, 22 guide cylinder, 26 large valve body, 29 small intake and exhaust port, 31 float, 34 small valve

Claims (9)

A suction unit having a float housed in a casing connected to the top of the pipe, and a suction / exhaust port for opening and closing the float to open and close to introduce air into the casing or discharge air accumulated in the casing; An exhaust valve device,
The intake / exhaust port is provided on a lid that covers the top end of the casing, and the lid is provided from an upper side of the intake / exhaust port to the outside to guide a effluent to a predetermined location. A connection port to be connected, and an opening provided substantially over the entire outer peripheral area of the intake / exhaust port excluding the connection port and opening the intake / exhaust port to the atmosphere,
An intake and exhaust valve device characterized by the above-mentioned. A suction unit having a float housed in a casing connected to the top of the pipe, and a suction / exhaust port for opening and closing the float to open and close to introduce air into the casing or discharge air accumulated in the casing; An exhaust valve device,
The intake and exhaust ports consist of two, a large intake and exhaust port and a small intake and exhaust port,
The large intake / exhaust port is provided on a lid body detachably attached to the casing so as to cover the top end, and the lid body is provided outward from one side above the large intake / exhaust port and flows out. A connection port for connecting a conduit for guiding water to a predetermined location, and an opening provided substantially over the entire outer peripheral area of the large intake / exhaust port excluding the connection port and opening the large intake / exhaust port to the atmosphere. Has,
A guide cylinder in which the small intake / exhaust port is provided in the projection plane of the large intake / exhaust port, and the large intake / exhaust port is opened / closed at the upper end so that the small intake / exhaust port can be freely attached to and detached from the upper end. The floating body provided with a small valve element for opening and closing the small intake and exhaust ports is vertically movable so as to collect a floating body vertically movable.
An intake and exhaust valve device characterized by the above-mentioned. The lid has a cover member that covers the intake / exhaust port / or the large intake / exhaust port, the connection port is formed on one side of the cover member, and the opening is connected to the connection port of the cover member. The intake / exhaust valve device according to claim 1, wherein the intake / exhaust valve device is formed on an outer peripheral line portion that is excluded. 4. The intake / exhaust valve device according to claim 1, wherein a rising edge for guiding the effluent to the connection port is provided on an inner peripheral portion of the opening so as to surround the intake / exhaust port / or the large intake / exhaust port. 5. The intake / exhaust valve device according to claim 1, wherein a strainer is provided in an air flow path from the opening to the intake / exhaust port / large intake / exhaust port. The intake / exhaust valve device according to claim 3, 4 or 5, wherein the cover member is detachably and rotatably attached to the lid. The upper area of the intake / exhaust port / or the large intake / exhaust port is covered with a top cover plate, and the opening is formed downward inside a side cover plate extending from the top cover plate. 4. The intake and exhaust valve device according to 4, 5, or 7. 3. The intake / exhaust valve device according to claim 2, wherein the lid is detachably attached to the casing by screw fitting, and the large valve is detachably attached to the guide tube by fitting. 3. The intake and exhaust valve device according to claim 2, wherein the float having the small valve body has a larger buoyancy than the guide cylinder having the large valve body.

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