JPH083884Y2 - An rim cut valve mainly used for bath kettles with water heaters - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention is a check valve for preventing water on the secondary side from flowing back to the primary side provided in a valve box, and an intake air for opening the secondary side in the valve box to the atmosphere. The present invention relates to an edging valve mainly used for a bath tub with a water heater, which combines valves to open the secondary side to the atmosphere when the check valve is opened.

More specifically, the edging valve of the present invention is provided with a check valve valve seat facing the check valve and an intake valve valve seat facing the intake valve in the valve box. , The check valve valve seat is located above and the intake valve seat is located below, and the intake valve is installed between the check valve and the intake valve. When the valve seat for the valve is closed, an auxiliary valve mechanism is provided that opens and closes the communication between the atmosphere opening port controlled by the intake valve and the valve box lumen, and the check valve is the intake valve. On the other hand, the present invention relates to an improvement of an edging valve in a form in which the check valve is controlled to open by rising and the check valve to close by lowering with respect to the intake valve.

[0003]

2. Description of the Related Art As shown in FIG. 1, an edge valve A of the above-described form is provided with a solenoid valve SV for a hot water supply circuit 1a including a hot water supply heat exchanger h1 and a water amount sensor S. Primary-side pipe 1 to be connected with the heat exchanger h for additional heating
2, a circulation pump P, a flow switch SW, and the like, and a secondary-side pipe that is connected via a check valve V to a miscellaneous water circuit 2a for reheating the hot water in the bathtub B. It is provided so as to be connected between the two and 2, so that when the negative pressure occurs on the primary side, the miscellaneous water in the bathtub B is surely prevented from flowing back to the hot water supply circuit 1a. This is the edging valve used.

As described above, the edge cutoff valve A mainly used in the bathtub with a water heater is constructed as shown in FIG. That is, in the valve box 3, on the upper surface side of the valve chamber 3a provided in the valve box 3 so as to accommodate the check valve a and the intake valve b,
A communication port 30 communicating with the pipe 1 on the primary side is provided, an atmosphere opening port 32 that opens to the outside is provided on the lower surface side, and a secondary side is provided on the side surface side between the communication port 30 and the atmosphere opening port 32. A communication port 31 communicating with the side pipe 2 is formed also as a connection port, and a strainer accommodating chamber 3b communicating with the communication port 30 is provided above the valve chamber 3a. A connection port 3c for connecting 1 is formed.

A check valve a and an intake valve b are housed in the valve chamber 3a, and a check valve valve seat 33 facing the check valve a is provided around the communication port 30. Valve chamber 3a
It is formed in an annular shape protruding downward from the ceiling of
An annular intake valve seat 34 facing the valve chamber 3a is provided around the atmosphere opening 32 at the bottom of the valve chamber 3a, and a check valve seat 34 is provided below the check valve valve seat 33. It is installed by arranging so as to face the top and bottom with respect to 33.

In addition, the check valve a pushes its valve shaft 40 into the strainer housing chamber 3b and urges it toward the rising side by the spring 41, so that the communication port 30 is opened by the spring pressure of the spring 41. The intake valve b is pressed against the intake valve valve seat 34 from above to close the atmosphere opening port 32, and the check valve a and the intake valve b are connected to each other by a check valve. The shaft-shaped connecting member 4a having an abutment collar 4b at the lower end of the shaft-shaped connecting member 4a on the lower surface side of a and the cage-shaped connecting member 5 on the upper surface side of the intake valve b are formed at the shaft-centering portion. By the slidable fitting with the shaft-hole-shaped connecting hole 50, the intake valve b is connected so as to follow the check valve a in a state where the relative movement within the fixed range D is allowed. .

Further, the auxiliary valve mechanism 6 provided between the check valve a and the intake valve b is an intake valve valve provided at the axial center portion of the intake valve b and the intake valve b being provided at the atmosphere opening port 32. In the state of abutting against the seat 34, a small-diameter communication hole c that allows the atmosphere opening port 32 to communicate with the inside of the valve chamber 3a is provided, and a ring-shaped auxiliary valve valve seat 60 is formed on the upper end side thereof. The valve body 61 for the auxiliary valve, which faces the auxiliary valve body 61, is formed of rubber or a synthetic resin material, and is held by a wrapping body 62 made of a metal material. It is configured to be held in the inner cavity of the connecting member 4a so as to be tiltable and swingable in the left-right direction.

As another conventional edge sluice valve, another type is disclosed in Japanese Utility Model Laid-Open No. 14379/1993.
This edging valve is constructed such that a pressure-sensitive slide body integrally provided with a check valve body is made to face the communication port provided on the upper surface side of a valve box communicating with the primary side pipe from below, and the closing side is provided. The first pressure-sensitive sliding body is provided with a backflow prevention chamber opening / closing valve separately formed in a water draining hole provided on the lower surface side of the valve box so as to vertically oppose the communication port. And a second spring connected to the upper spring so as to urge the upper spring upward, and a hollow shaft portion of this check valve is formed to form an air through hole. The head of the upper end of the shaft portion is fitted into a recess provided in the lower end surface of the rod of the pressure-sensitive sliding body,
The air through hole is closed by the abutment between the O-ring provided on the head and the bottom of the recess.

[0009]

In the former edging valve A shown in FIG. 2, the above-mentioned conventional means is the check valve a and the intake valve b in the valve chamber 3a which are vertically opposed to each other. Are stored in such a state that they can be moved relative to each other within a certain range so that they can move up and down together, the check valve a pushes down the intake valve b, and the intake valve b is moved to the intake valve seat 34. The auxiliary valve of the auxiliary valve mechanism 6 causes the intake valve b to incline laterally with respect to the intake valve b to make the pressure contact with the intake valve seat 34 incomplete when the valve is pressed against the intake valve b. The auxiliary valve element 61 of the auxiliary valve mechanism 6 is laterally oscillated in the inner cavity of the shaft-cylindrical coupling member 4a, although the oscillating operation of the auxiliary valve element 61 prevents the valve element 61. The parts can be inspected by holding them in a state in which they have a degree of freedom so that they can be performed freely. And that the increase is production cost Te Kuna',
Errors due to the combination of the respective parts are concentrated on the valve closing operation of the auxiliary valve mechanism 6, so that the auxiliary valve mechanism 6 is not closed promptly,
Therefore, the closing of the intake valve b tends to be delayed, which causes a problem of increasing the amount of drainage to the outside.

In the latter means, which is disclosed in Japanese Utility Model Laid-Open No. 3-14379, when the check valve body opens due to the flow from the pipe, the pressure-sensitive sliding body is integrated with the check valve body. The two springs, the first spring that is connected to the check valve and the second spring that is connected to the check valve for the backflow prevention chamber, are compressed, so that the flow rate of the flow that opens the check valve body is reduced. However, it is necessary to have an amount that opposes the sum of the spring forces of these two springs, the first spring and the second spring, which makes it impossible to use at a small flow rate, and the operation of the backflow prevention device becomes impossible. There is a question of uncertainty.

The present invention has been made in order to solve the problems occurring in these conventional means, and enables the check valve to be opened and closed properly even with a small flow rate through the edge valve. Due to the error of the combination of each part,
An object of the present invention is to provide a new means that does not reach the closing operation of the auxiliary valve and allows the closing operation of the intake valve to be performed quickly and accurately.

[0012]

In the present invention, as means for achieving the above-mentioned object, a valve box is provided on the upper surface side of a valve chamber provided therein and on the primary side pipe. A communication port that communicates with each other is provided, and an atmosphere opening port that opens to the outside is provided on the lower surface side of the valve chamber, and communication is made to the piping on the secondary side between the atmosphere opening port and the communication port on the side surface of the valve chamber. A check valve and an intake valve are arranged in the valve chamber so that the check valve is in the upper position and the intake valve is in the lower position, and the check valve is installed on the ceiling side of the valve chamber. A check valve valve seat is provided to face the intake valve, and an intake valve seat facing the intake valve is provided on the bottom surface so as to face the check valve valve seat vertically. A small diameter communication hole is formed to connect the atmosphere opening port to the valve chamber when it is in pressure contact with the intake valve seat, and the upper end of it is assisted. A check valve valve seat is provided, and a spring for urging the check valve is connected to the check valve, and the auxiliary valve valve seat is opened / closed on the lower surface side of the check valve so as to face the auxiliary valve valve seat. In the edging valve equipped with the valve element for the auxiliary valve, a hanging member having an engaging claw portion at the lower end side is provided on the lower surface side of the check valve so as to project downward, and on the upper surface side of the intake valve. , A receiving member provided with an engaging claw portion that engages with the engaging claw portion at the upper end side so as to be engageable with and disengageable from the upper side, and is connected to the hanging member and the receiving member to form a check valve. The intake valve is suspended and supported so as to freely swing about an abutment point between the engaging claw portion of the hanging member and the engaging claw portion of the receiving member, and the check valve and the intake valve are fixed at a fixed distance. Mainly a bath kettle with a water heater characterized by allowing relative movement within the range and connecting them so that they move up and down together It is intended to raise the edge cutting valve to be used.

[0013]

Embodiments Next, embodiments will be described in detail with reference to the drawings. The same reference numerals are used for the constituent members having the same effects as those of the conventional means.

FIG. 4 is a vertical sectional view of an edging valve A used mainly in a bath with a water heater for implementing the present invention. In FIG. 4, 3 is a valve box and 3a is a valve chamber installed in the valve box 3. ,
30 is a communication port communicating with the primary side, 31 is a communication port communicating with the secondary side, 32 is an atmosphere opening port communicating with the outside, a is a check valve, b is an intake valve, c is a small diameter communication hole, 6 Is an auxiliary valve mechanism, 7 is a suspending member provided on the lower surface side of the check valve a, and 8 is a receiving member provided on the upper surface side of the intake valve b.

The main body of the valve box 3 is formed in the shape of a cylinder whose axial direction is the vertical direction, and the valve chamber 3a and the communication port 30 formed inside are formed in the upper part of the main body. A strainer accommodating chamber 3b that communicates therewith is formed. And
In the strainer chamber 3b, the pipe 1 on the primary side (see FIG.
Connection side 3c for connecting with the guide tube portion 3d is provided on the bottom side of the valve box 3 so as to extend the atmosphere opening port 32 downward. Is formed. In addition, a connection tube 3e protruding in a side branch shape is formed in the side surface portion of the valve chamber 3a so as to extend the communication port 31 that communicates with the secondary pipe 2 (see FIG. 1). A check valve 9 biased by a spring 90 so as to close the communication port 31 when the pressure in the valve chamber 3a is reduced is incorporated in the connecting cylinder 3e.

A check valve a and an intake valve b are housed in the valve chamber 3a in a state where they are vertically opposed to each other so that the check valve a is in the upper position and the intake valve b is in the lower position. The valve a is
The valve shaft 40 of the strainer accommodating chamber 3b is provided through the inner cavity of the guide sleeve 42 provided on the ceiling wall of the valve chamber 3a.
Of the valve element 43, which is formed into a disc shape by rubber or synthetic resin material, is urged to rise upward by a spring 41 provided in the strainer accommodating chamber 3b. The periphery of the check valve valve seat 33, which is annularly formed at a portion around the communication port 30 on the lower surface side of the ceiling wall of the valve chamber 3a, is different from the spring 41 described above.
The contact pressure is closed by the spring pressure to close the communication port 30.

Further, the intake valve b is provided with a cage-shaped sliding member 51 on the lower surface side, and the sliding member 51 is slidable on the above-mentioned guide cylinder portion 3d provided at the bottom of the valve box 3. It is fitted to and is supported so as to move up and down by this sliding.
Then, by moving downward, the peripheral edge of the disc body 53 formed of rubber or a synthetic resin material in a disc shape is formed in an annular shape around the atmosphere opening port 32 on the bottom surface of the valve chamber 3a. The valve seat 34 is pressed into contact with the valve seat 34 to close the atmosphere opening port 32.

Further, the auxiliary valve mechanism 6 has the atmosphere opening port 32 with respect to the inside of the valve chamber 3a when the intake valve b closes the atmosphere opening port 32 at the axial center portion of the intake valve b. A small-diameter communication hole c for communication is formed, an auxiliary valve valve seat 60 is formed on the upper end side thereof, and an auxiliary valve valve body 61 facing the auxiliary valve seat 60 is mounted on the lower surface side of the check valve a. However, the valve seat 60 for the auxiliary valve thereof is formed integrally with the valve body support fitting 54 to which the valve body 53 of the intake valve b is assembled.

Further, a valve body 61 for the auxiliary valve of the auxiliary valve mechanism 6
Is a valve holding cylinder 45 of a cylindrical shape that opens downward on the lower surface side of a protective plate made of a metal material for assembling and holding the valve body 43 of the check valve a. An auxiliary valve valve body 61 formed of rubber or a synthetic resin material is fitted into the inner cavity of the valve holding cylinder 45, and fixed with a stopper 46 to be fixedly mounted on the lower surface side of the check valve a. There is.

The connection between the check valve a and the intake valve b is
On the lower surface side of the check valve a, the protective plate 44 made of the above-mentioned metal material
And a hanging member 7 that hangs downward continuously with the
A hook-shaped engaging claw portion 70 is integrally formed on the lower end side thereof, and on the upper surface side of the intake valve b, the valve body supporting metal fitting 54 made of a metal material is integrally and continuously projected upward. And the engaging claw portion 80 that engages with the engaging claw portion 70 of the hanging member 7 in a disengageable manner is provided on the upper end side of the engaging claw portion 70. Due to the engagement with the claw portion 80, the check valve a
And the intake valve b are connected so as to move up and down together.

Then, by this, the check valve a and the intake valve b
Are relatively movable within a distance range corresponding to a gap D formed between the lower surface of the engaging claw portion 70 of the hanging member 7 and the upper surface of the valve body support fitting 54 of the intake valve b, and The intake valve b is hung and supported with respect to the check valve a so as to freely swing about an abutting point w between the engaging claw portion 70 of the hanging member 7 and the engaging claw portion 80 of the receiving member 8. is there.

[0022]

The device of the embodiment thus constructed operates as follows. When the hot water supply circuit 1a, which is the pipe 1 on the primary side, is maintained at a predetermined pressure, the check valve a in the valve chamber 3a is
The intake valve b is held in the state shown in FIG.

Next, the hot water supply circuit 1 leading to the pipe 1 on the primary side
When a becomes a negative pressure due to water cutoff or the like, first, the check valve a is moved up by the pressure of the spring 41 by a distance corresponding to the gap D, whereby the auxiliary valve mechanism 6 is opened.

As a result, when the back pressure applied to the intake valve b disappears, the check valve a and the intake valve b together move upward due to the spring pressure of the spring 41, and the check valve a The communication port 30 is closed, the intake valve b opens the atmosphere opening port 32, drops the water in the valve chamber 3a downward from the atmosphere opening port 32, and replaces it with the outside air, and the primary side pipe 1 and the secondary side pipe The edge between 2 and is completely cut off.

Next, when the water pressure in the pipe 1 on the primary side is restored from this state, the check valve a is pushed down by the water pressure against the bias of the spring 41, and the communication port 30 is opened.
Is opened, and at the same time, an auxiliary valve valve body 61 provided on the lower surface thereof is provided with an auxiliary valve valve seat 60 provided on the upper surface of the intake valve b.
The intake valve b is pushed down and the atmosphere opening port 32 is closed.

Next, when the water pressure in the pipe 1 on the primary side is restored from this state, the check valve a is pushed down by the water pressure against the bias of the spring 41, and the communication port 30 is opened.
Is opened, and at the same time, an auxiliary valve valve body 61 provided on the lower surface thereof is provided with an auxiliary valve valve seat 60 provided on the upper surface of the intake valve b.
The intake valve b is pushed down and the atmosphere opening port 32 is closed.

At this time, the abutment of the auxiliary valve valve body 61 provided on the lower surface side of the check valve a with the auxiliary valve seat 60 provided on the upper surface side of the intake valve b is the lowering operation of the check valve a. In some cases, the process may not be performed with the shaft core lines properly aligned, but may be performed with an oblique inclination. In this case, the intake valve b is swingable with respect to the check valve a by the abutting point w between the engaging claw portion 70 of the hanging member 7 and the engaging claw portion 80 of the receiving member 8. The deviation of the intake valve b with the abutment point w as a fulcrum is absorbed, and thus the abutment between the auxiliary valve valve body 61 and the auxiliary valve valve seat 60 is correctly corrected and the auxiliary valve mechanism 6 is closed properly. Come to speak.

[0028]

As described above, the rim cut valve mainly used in the bath with the water heater according to the present invention has the non-return valve a and the intake valve b, which are vertically opposed in the valve chamber 3a. The suspension member 7 provided on the lower surface side of the check valve a is used for connecting together so as to move up and down together while allowing relative movement within the range.
By engaging the engaging claw portion 70 at the lower end with the engaging claw portion 80 at the upper end of the receiving member 8 provided on the upper surface side of the intake valve b.
For the check valve a, the intake valve b has the engaging claw portion 70 and the engaging claw portion 80.
The auxiliary valve valve body 61 and the auxiliary valve valve seat 60 are integrally mounted on the check valve a and the intake valve b, respectively, so that the auxiliary valve valve body 61 and the auxiliary valve valve seat 60 are integrally rocked. Since the check valve “a” is installed, the abutment between the auxiliary valve valve body 61 and the auxiliary valve valve seat 60 is inclined due to an error in the lowering operation of the check valve a. In this case, the deviation is absorbed by the swing of the intake valve b with the abutting point w as the fulcrum, and the auxiliary valve mechanism 6 comes to close correctly. Since the spring connected to the intake valve b is omitted, the check valve a can be opened exactly by pressing one spring 41. Therefore, the check valve a can be appropriately operated even with a small flow rate. Like

Therefore, the number of parts to be assembled can be reduced while adapting to the use of a small flow rate, and the auxiliary valve mechanism 6 and the intake valve b can be closed by the error in assembling each part. The influence exerted on the auxiliary valve mechanism 6 and the intake valve b can be reduced quickly and appropriately, and the amount of drainage to the outside can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a circuit of a bath kettle with a water heater using an edge valve.

FIG. 2 is a vertical sectional front view of a conventional edging valve.

FIG. 3 is a vertical sectional front view showing a state in which the intake valve is opened.

FIG. 4 is a vertical sectional front view of an edging valve according to the present invention.

FIG. 5 is a vertical sectional front view showing a state in which the intake valve is opened.

[Explanation of symbols]

A ... edging valve, B ... bathtub, a ... check valve, b ... intake valve, c
… Communication hole, w… Abutting point, h1… Heat exchanger for hot water supply, h2
... Heat exchanger for reheating, S ... Water amount sensor, SV ... Electromagnetic valve, P ... Circulation pump, SW ... Slow switch, V ... Check valve, D ... Distance, 1 ... Piping, 1a ... Hot water supply circuit, 2 ... Piping,
2a ... water circuit for reheating, 3 ... valve box, 3a ... valve chamber, 3
b ... strainer accommodating chamber, 3c ... connection port, 3d ... guide tube portion, 3e ... connection tube, 30/31 ... communication port, 32 ... atmosphere opening port, 33 ... check valve seat, 34 ... intake valve Seat, 4
a ... connecting member, 4b ... abutting collar, 40 ... valve shaft, 41 ... spring, 42 ... guide sleeve, 43 ... valve body, 44 ... protective plate, 45 ... valve holding cylinder, 46 ... stopper metal, 5 ... connecting member ,
50 ... Connection hole, 51 ... Sliding member, 53 ... Valve body, 54 ... Valve body support fitting, 6 ... Auxiliary valve mechanism, 60 ... Auxiliary valve valve seat, 6
DESCRIPTION OF SYMBOLS 1 ... A valve element for auxiliary valves, 62 ... Enclosing body, 7 ... Suspension member, 70
... engagement claws, 8 ... receiving members, 80 ... engagement claws, 9 ... check valves, 90 ... springs.

Claims (1)

[Scope of utility model registration request] 1. The valve box 3 has a valve chamber 3 provided therein.
Communication port 3 communicating with the primary pipe 1 on the upper surface side of a
0 is provided, and an atmosphere opening port 32 for opening to the outside is provided on the lower surface side of the valve chamber 3a, and a pipe 2 on the secondary side is provided between the atmosphere opening port 32 and the communication port 30 on the side surface of the valve chamber 3a. A communication port 31 communicating with each other is provided, and a check valve a and an intake valve b are arranged and stored in the valve chamber 3a such that the check valve a is positioned higher and the intake valve b is positioned lower. A check valve valve seat 33 facing the check valve a is provided on the ceiling side of the valve chamber 3a, and an intake valve valve seat 34 facing the intake valve b is provided on the bottom side of the check valve valve seat 3
3 so as to vertically oppose to each other, and the intake valve b is
Is formed in a state of being pressed against the intake valve valve seat 34, a small diameter communication hole c for communicating the atmosphere opening port 32 with the valve chamber 3a is formed, and an auxiliary valve valve seat 60 is provided at the upper end thereof. Check
The valve a in tandem a spring 41 for urging the closed side, the lower surface side of the check valve a, an auxiliary valve for opening and closing the auxiliary valve valve seat 60 in opposition to the auxiliary valve valve seat 60 Attach valve body 61
In the edging valve, the check valve a is provided on the lower surface side thereof with the hanging member 7 having the engaging claw portion 70 on the lower end side so as to project downward, and on the upper surface side of the intake valve b, the upper end side is provided. The receiving member 8 having the engaging claw portion 80 that is detachably engaged with the engaging claw portion 70 is provided so as to project upward, and the check valve is formed by connecting the hanging member 7 and the receiving member 8 to each other. Intake valve b
The engaging claw portion 70 of the hanging member 7 and the engaging claw portion 8 of the receiving member 8
The check valve a and the intake valve b are fixed to each other while being suspended and supported so as to freely swing about an abutment point w with 0 as a fulcrum.
An edge-cutting valve mainly used in a bathtub with a water heater, which is characterized by allowing relative movement within the range of the distance and being connected so as to move up and down together.