JPH0579080A - Drainage pipeline connecting structure - Google Patents

Abstract

PURPOSE:To make any backflow out of sewage surely checkable even if it is slight and gentle by constituting a damper type valve, installed in a check valve chamber, so as to adhesively close its owing part at all times by dint of a pressing means such as a weight or the like. CONSTITUTION:A damper type valve 34, consisting of a damper part 34a being composed of a flat plate and an operating rod 34b being situated at the opposite side in holding a fulcrum shaft 35 between, is installed in a check valve chamber 24 in a connecting unit 11 interposed between an apparatus producing drainage and a sewer pipe 16. With weight of a weight 38 constituting a pressing means 36 attached to the operating rod 34b, the damper part 34a is constituted so as to always press and close an opening part 32 being interconnected to a first passage 26. In this connection, it may be so constituted that a spring is used for the pressing means in place of the weight 38. With this constitution, a backflow out of sewage and a startup of stink, etc., are kept back so effectively, namely, even if this backflow is slight and gentle, it is checkable with certainty.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage pipe connection structure, and more specifically, to a dishwasher for draining liquid (hereinafter referred to as "drainage") that has been used up after required work. Directly sealed connection between equipment such as an ice maker and an ice maker and the drainage port of the sewage equipment that opens at the installation location of the equipment to prevent backflow from the sewage, rising stench, and other insects inside the equipment. The present invention relates to a drainage pipe connection structure that can effectively prevent the inflow into the drainage pipe and can reliably prevent the backflow from the sewage even if it is slight and slow.

[0002]

2. Description of the Related Art Dishwashers, automatic ice makers, and other commercial / consumer appliances such as refrigerators produce some drainage during operation, although there are some amounts. For example, the washing liquid is discharged from the washing machine, the ice making residual water is discharged from the ice making machine, and the melted water such as ice and frost is discharged from the refrigerator. Generally, these drains are drained through a hose to the drain of the sewage system installed at the installation location of the equipment (however, in a domestic refrigerator, etc. where the drainage is small, In some cases, the liquid may be dropped on the bottom plate to evaporate naturally.) That is, as shown in FIG. 11, a drainage hose 12 is led out from a device 10 represented by a dishwasher, and the hose 12 is connected to a drainage port 14 of a sewage pipe 16 which is raised by a required dimension from an installation floor surface. It is connected. In this case, the drainage hose 12 is not directly connected to the sewage pipe 16, but is often indirectly connected by being separated by about 50 mm as an example. This is because if the hose 12 is directly connected to the pipe 16 when the sewer flows backward, there is a fear that dirty water will enter the device 10. Further, the hose 12 is curved in a lateral S shape to form a trap 18, and a drainage having a required depth is retained in the trap 18, so that a foul odor from the sewer enters the device 10 through the hose 12. I try not to get in.

However, in the above indirect connection structure, the hose 1
It is difficult to secure a certain center line or indirect distance between the 2 and the pipe 16, backflow from the sewer flows out to the floor, and a bad smell of the sewage and insects escape to the outside. There are many. Therefore, a connection structure in which the hose 12 and the pipe 16 are directly connected to each other and the drawbacks associated with the above-mentioned indirect connection are solved is also generally practiced. In this structure, the hose 1
A trap 18 curved in a U shape is formed in the middle of 2 to prevent a bad odor rising from the sewage from entering the device 10.

[0004]

As described above, the structure in which the hose 12 and the sewage pipe 16 are directly connected is far superior to the indirect connection type in terms of maintaining environmental hygiene. However, when the sewage flows back from the sewage pipe 16, the trap 18 is often ineffective against this backflow (though the backflow water does not flow out to the installation floor because of direct connection). That is, when the sewage flows backward, it often occurs in a protruding manner with pressure. Therefore, in the trap 18 in which the waste liquid is contained only in a retentive manner, the backflow water easily breaks through the accumulated liquid in the trap 18. Then, it invades the inside of the device 10.

Therefore, it has been proposed to provide a flap valve as a check valve in the drainage system. However, the flap valve is only suspended and supported immediately before the opening opened vertically to the pipe system, and is in a freely suspended state during normal operation when no backflow occurs. Therefore, in this type of flap valve, the opening is closed by the water pressure associated with the backflow, but when the backflow is slight and slow, the flap valve and the opening are not pressure-sealed. Therefore, it has a serious drawback that the backflow directly enters through the gap.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned drawbacks inherent in the drainage pipe line connection structure according to the prior art, and is proposed in order to solve the above disadvantages. A device such as a machine and a drain of a sewage facility that is opened at the installation location of the device can be directly connected to effectively prevent backflow from sewage and rise of a bad odor, and also backflow from the sewage. It is an object of the present invention to provide a drainage pipe connecting structure capable of surely preventing even a small and slow one.

[0007]

In order to overcome the above problems and preferably achieve the intended purpose, the drainage pipe connection structure according to the present invention drains a used liquid such as a washing machine. In a drainage structure that is connected between the equipment and the drainage port of the sewage facility and has a trap for sealing liquid in the middle, a check valve in which a drainage inlet and a check valve connected to the device are installed A first passage communicating with the chamber, and a second passage communicating with the check valve chamber and a drain outlet connected to the drain of the sewage system. The check valve is provided inside the check valve chamber. The first passage comprises a damper type valve which is rotatably supported so as to close and open an opening portion which opens to the check valve chamber, and a crimping means is related to the damper type valve. The damper valve is configured to be crimped to the opening portion so as to be always closed tightly. .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a drainage pipe connecting structure according to the present invention will be described with reference to the accompanying drawings with reference to preferred embodiments. FIG. 1 is a side view showing a partial sectional view of a drainage pipe connection structure according to an embodiment. FIG. 2 is an explanatory diagram showing a state in which the unit 11 relating to the drainage pipe connection structure is interposed between a device 10 that produces drainage due to operation such as a dishwasher and a sewer pipe 16. Is. The connection unit 11 shown in the drawing comprises a closed casing 13 made of a hollow molded body such as aluminum or resin.
Has a drainage inlet 22 connected to the drainage pipe 15 of the device 10 on the upper left side, and a drainage outlet 28 connected to the drainage port 14 of the sewage pipe 16 on the lower right side. In the illustrated example, the drainage port 14 and the drainage outlet 28 are connected by an elbow 17. In the connection structure shown in FIG. 2, the connection unit 11 is exposed to the outside of the device 10. However, even if the unit 11 is completely housed inside the device 10 and only the elbow 17 is exposed. Good. At this time, the appearance of the device 10 becomes neat and compact, which is more preferable.

Inside the closed casing 13, a first passage 26 communicating with the drainage inlet 22 and a check valve chamber 24 in which a check valve 34 described later is installed, and the check valve chamber 2
4 and a second passage 30 communicating with the drain outlet 28. That is, a check valve chamber 24 having a required space is formed in the middle of the inside of the casing 13, and the check valve chamber 24 is connected to the drain inlet 22 on the inlet side of the drain.
6 are in communication. A second passage 30 communicates the drain outlet 28 on the drain outlet side with the check valve chamber 24. In this case, the opening 32 through which the first passage 26 communicates with the check valve chamber 24 is preferably configured to open vertically downward toward the check valve chamber 24, as shown in FIG. .. Therefore, the opening 32 has a horizontal open end surface which is orthogonal to the vertical.

In the check valve chamber 24, the sewage pipe 1
Even if sewage flows backward from 6, the check valve 34 is installed so that the sewage does not enter the first passage 26. The check valve 34 is configured as a damper valve that closes and opens the opening 32 that communicates the first passage 26 with the check valve chamber 24. That is, the damper valve 34 has a horizontal opening 3
2, a damper portion 34a formed of a flat plate that can be opened and closed completely from below, and the damper portion 34 with a pivot 35 (described later) interposed therebetween.
It comprises an operating rod 34b located on the opposite side of a. The damper-type valve 34 is swingably supported inside the check valve chamber 24 at a position close to the opening 32 via a pivot shaft 35. Further, a weight 38 made of a heavy metal such as lead is arranged on the operating rod 34b, and the weight of the weight 38 causes the damper portion 34a to always close the opening 32 by crimping. However, the weight of the weight 38 is such that when the drainage discharged from the device 10 and reaching the first passage 26 reaches a required level, the weight of the drainage causes the damper valve 34 to rotate in a clockwise direction indicated by an imaginary line. The damper portion 34a is preset to a value that allows the damper portion 34a to open to open the opening 32. The damper part 34a has a flexible packing 37 having a high corrosion resistance in order to have a good sealing property with the opening 32.
Is attached.

As described above, the damper valve 3 shown in FIG.
Reference numeral 4 includes an operating rod 34b located on the opposite side of the damper portion 34a and the pivot shaft 35, and the operating rod 34b.
Has a required offset angle that is bent obliquely downward with respect to the damper portion 34a. The reason is that, as shown in FIG. 8A, when the damper portion 34a and the operating rod 34b are connected by a straight line, when the valve 34 is rotated clockwise to open the valve, the weight is reduced. The center of gravity of 38 approaches the pivot 35. Therefore, the counterclockwise rotation moment of the weight 38 becomes small, and the operation at the time of valve closing becomes uncertain. However, as shown in FIG. 8B, if an offset angle is provided between the operating rod 34b and the damper portion 34a,
Even if the valve 34 is rotated clockwise due to the valve opening, the center of gravity of the weight 38 moves away from the pivot shaft 35 or remains substantially the same. Therefore, the rotational moment in the counterclockwise direction is kept large, and the valve closing does not become uncertain.

Further, the reason why the first passage 26 is configured to open vertically downward toward the check valve chamber 24 as described above is as follows. In the connection structure according to the embodiment, the weight 38 is attached to the damper valve 34, and the damper portion 34a closes the opening portion 32 that communicates with the first passage 26 at all times. At this time, if the first passage 26 is opened horizontally with the check valve chamber 24, the damper valve 34 will not perform the opening operation when the amount of liquid drained from the device 10 is small (tableware. This is not the case when the liquid is forcibly drained by a pump like a washing machine). However, as shown in the illustrated example, if the first passage 26 is formed so as to be directed vertically downward, even if a small amount of drainage is accumulated to a required level, the damper valve 34 is opened by the increased weight. It is operated in the valve direction, and reliable operation can be obtained. The reason why the opening 32 is completely closed by the damper valve 34 even during normal times when no backflow occurs is that insects such as maggots that live in the sewer cannot be prevented by a normal trap.

Further, in FIG. 1, a trap portion 18 for sealing liquid is formed in the first passage 26. The trap portion 18 is provided with a liquid sealing chamber 44 located between the drainage inlet 22 and the check valve chamber 24, and the liquid sealing chamber 44 defines, for example, a cylindrical space portion extending vertically downward. Is made. A partition wall 46 is provided above the inside of the liquid sealing chamber 44 so as to hang a required distance.
Is provided to partition the liquid sealing chamber 44 into two chambers. The depth h of the drainage liquid enclosed in the trap portion 18
Is defined by the lower open end of the partition wall 46. By partitioning the vertical liquid-sealing chamber 44 with the partition wall 46 in this way, as shown in FIG. 9, the lateral dimension L can be made smaller than that of the conventional trap structure to achieve compactness. Further, even if a foul odor from the sewer pipe 16 may enter the first passage 26 side when the damper valve 34 is opened,
Since this malodor is completely captured by the trap portion 18, it does not reach the inside of the device 10.

According to the drainage pipe connection structure of the embodiment shown in FIG. 1, the sewage that flows backward from the sewage pipe 16 and flows into the check valve chamber 24 is generally accompanied by water pressure, so that it is always A damper valve 34 that actively crimps the opening 32,
Further, it will be pressed in that state. Therefore, the opening 3
2 is securely closed and held by the damper type valve 34, so that the backflow exceeds the check valve chamber 24 and the trap portion 18 and the first
Entry into the passage 26 is prevented in advance. Also,
Even if the backflow from the sewage pipe 16 is slight and slow, and even if insects such as maggots traveling along the sewage pipe 16 enter the check valve chamber 24, the damper-type valve 34 remains Since the pressure is constantly urged toward the opening 32, it is possible to completely avoid the inconvenience of a backflow, insects and the like entering through the gap between the valve body and the opening as in the conventional case.

FIG. 3 shows another embodiment of the drainage pipe connection structure according to the present invention, in which the damper valve 3 according to FIG.
Only the crimping means of 4 are different. Therefore, FIG. 3 shows only the portion surrounded by the circle A in FIG. 1 (the same applies to FIGS. 4 and 5). In this other embodiment, as the crimping means 36 for constantly urging the damper type valve 34 pivotally supported in the check valve chamber 24 toward the opening 32,
Spring 40 is used. That is, the pivot 35
Centering on the center, the operating rod 34b extending with an offset angle on the side opposite to the damper portion 34a, and the check valve chamber 24
A tension spring 40 is elastically interposed between the tension valve 40 and the bottom portion thereof, and the biasing force of the spring 40 constantly presses the damper valve 34 toward the opening 32. However, this biasing force is overcome by the required weight of the drainage liquid that arrives in the first passage 26 and stays there, and the damper valve 34 is rotated clockwise as indicated by the imaginary line to allow the damper portion 34a to rotate.
Is designed to open the opening 32.

FIG. 4 shows a modification of the embodiment shown in FIG. 1, in which the damper portion 34 of the damper valve 34 is used.
On the lower surface of a, the float 4 which is given buoyancy by the sewage that flows backward from the sewage pipe 16 and stays in the check valve chamber 24.
2 is additionally provided. As a result, when a slight and weak backflow arrives at the check valve chamber 24, buoyancy is applied to the float 42 in contact with the backflow liquid, and therefore, the compression effect of the damper valve 34 due to the weight of the weight 38 is further increased. Can be increased. The positional relationship between the float 42 and the drainage outlet 28 is shown in FIG. That is, the damper portion 34a that normally closes the opening 32 maintains a horizontal posture, and the float 42 is also horizontally provided on the lower surface thereof. Therefore, even if the sewage flows back and enters the check valve chamber 24, the sewage first advances as shown by the arrow and does not act on the float 42 or the damper valve 34 suddenly. In other words, the sewage gradually gives rise to the liquid level after directly hitting the left wall of the check valve chamber 24, and then gives buoyancy only when it comes into contact with the float 42. In addition, the operating rod 34 of the damper type valve 34
Since the weight 38 provided in b is located on the side opposite to the drain outlet 28, it is possible to prevent the backflow that has entered the check valve chamber 24 from directly acting on the weight 38, and thus the damper 38 is prevented. The formula valve 34 will not be accidentally opened. Further, FIG. 5 shows a modification of the embodiment shown in FIG. 3, in which a damper valve 34 is urged by a spring 40 in the crimping direction.
Similarly, a float 42 is arranged.

FIG. 6 shows another embodiment of the drainage pipe connection structure. In the basic structure shown in FIG. 1, backflow is prevented between the drainage inlet 22 and the trap portion 18 in the first passage 26. The ball valve 48 for this purpose is provided. That is, the second check valve chamber 24 having a required space is provided between the drainage inlet 22 and the trap portion 18 in the first passage 26, and the trap portion 18 is provided in the second check valve chamber 24.
Ball valve 48 that is given buoyancy by the sewage rising from the
Is decorated. An upper portion of the second check valve chamber 24 communicates with the drainage inlet 22 through an opening 49, and the opening 49 is set to have an opening dimension that is tightly closed by the rise of the ball valve 48. .. A lower portion of the second check valve chamber 24 communicates with an upper portion of the trap portion 18, and a drainage stopper 51 for preventing the ball valve 48 from falling is disposed in the communication portion. Therefore, even if the damper valve 34 in the check valve chamber 24 does not operate for some reason, and therefore the sewage flowing back from the sewage pipe 16 raises the sealing liquid height of the trap portion 18 at a stroke, Since the ball valve 48 in the second check valve chamber 24 is lifted by buoyancy to close the opening 49 tightly, the fear that the backflow water enters the device 10 is reliably prevented.

FIG. 7 shows still another embodiment of the drainage pipe line connection structure according to the present invention, which has an arrangement relationship opposite to that of the structure shown in FIG. That is, in this embodiment, the check valve chamber 24 in which the damper valve 34 is installed is provided on the side of the first passage 26, and the trap portion 18 in the second passage 30 is provided.
And a drain outlet 28, a second check valve chamber 25 is provided, and the ball valve 48 is arranged in the second check valve chamber 25. At this time, primarily, the ball valve 48 arranged in the second check valve chamber 25 blocks the reverse flow from the sewage pipe 16. However, for some reason the ball valve 48
Is not operating normally and a backflow from the sewage pipe 16 occurs, the backflow that broke through the trap portion 18 is blocked by the damper valve 34 provided in the first check valve chamber 24. It is a thing.

[0019]

As described above, according to the present invention, it is possible to directly connect a device such as a dishwasher which produces a drainage by a required work, and a sewer system which is opened at a place where the device is installed. In the drainage pipe connection structure described above, the damper valve pivotally supported in the check valve chamber allows the opening of the check valve chamber to be opened and closed, and the weight, spring, etc. The damper-type valve is biased in the pressure-bonding direction by the pressure-bonding means so that the opening is always closed tightly. Therefore, not only the backflow from the sewage but also the rise of a bad odor and the invasion of insects into the equipment can be prevented, and even a slight and slow backflow can be surely prevented.

[Brief description of drawings]

FIG. 1 is a side view showing a partial cross-section of a drainage pipe connection structure according to a preferred embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a state in which a unit related to the drainage pipe line connection structure shown in FIG. 1 is interposed between a device such as a dishwasher and a sewer pipe.

FIG. 3 is a schematic configuration diagram of a drainage pipe connection structure according to another embodiment in which the crimping means of the damper valve is different, and shows a portion surrounded by a circle A in FIG.

4 is a schematic configuration diagram of a drainage pipe connection structure according to another embodiment in which the crimping means of the damper valve is different, and shows a portion surrounded by a circle A in FIG. 1. FIG.

5 is a schematic configuration diagram of a drainage pipe connection structure according to another embodiment in which the crimping means of the damper valve is different, and shows a portion surrounded by a circle A in FIG. 1. FIG.

FIG. 6 shows another embodiment of the drainage pipe connection structure, which is the basic structure shown in FIG. 1 in which a ball valve is provided between the drainage inlet and the trap portion.

FIG. 7 shows still another embodiment of the drainage pipe connection structure, which has an arrangement relationship opposite to that of the structure shown in FIG.

FIG. 8 is an explanatory diagram regarding the reason why an offset angle is provided between the damper portion and the operating rod in the damper valve.

FIG. 9 is an explanatory diagram showing that the trap portion shown in the embodiment can have a smaller lateral dimension than that of a conventional trap structure and can be made compact as a whole.

FIG. 10 is an explanatory diagram showing a positional relationship between a float and a drainage outlet.

FIG. 11 is a schematic explanatory view showing an indirect connection structure according to a conventional technique.

[Explanation of symbols]

 10 Equipment such as Washing Machine 14 Sewage Drain Port 18 Trap Part 22 Drain Inlet 24 Check Valve Chamber 25 Second Check Valve Chamber 26 First Passage 28 Drainage Outlet 30 Second Passage 32 Opening 34 Damper Valve 36 Crimping means 38 Weight 40 Spring 42 Float 44 Sealing chamber 46 Partition wall 48 Ball valve

Claims (9)

[Claims] 1. A connection between a device (10) for discharging a used liquid such as a washing machine and a drain port (14) of a sewage system,
In a drainage structure including a trap part (18) for sealing liquid in the middle thereof, a drainage inlet (22) and a check valve (34) connected to the device (10).
In the first passage (26) communicating with the check valve chamber (24) in which is installed, and the drain outlet (28) connected to the check valve chamber (24) and the drain port (14) of the sewage system. The check valve (34) is rotatably supported inside the check valve chamber (24) so that the first passage (26) is connected to the second passage (30). The damper valve for closing and opening the opening (32) opening to the stop valve chamber (24) is formed, and the crimping means (36) is disposed in relation to the damper valve (34), A drainage pipe line connecting structure characterized in that the damper valve (34) is configured to press the opening portion (32) by pressure so as to always be in close contact. 2. The drainage pipeline connection structure according to claim 1, wherein the opening (32) of the first passage (26) is opened vertically downward toward the check valve chamber (24). 3. The crimping means (36) is a weight (38) provided on the side opposite to the opening contacting side of the damper type valve (34) around a pivot portion, and the weight (38) ) Is always the damper valve
The function of pressing the (34) toward the opening (32) and opening the opening (32) according to a required weight of the drainage liquid that reaches the first passage (26). Drainage pipe connection structure. 4. The damper type valve (3)
The spring (40) provided in (4),
The biasing force of (0) always causes the damper valve (34) to be crimped toward the opening (32), and the opening (32) is adjusted by the required weight of the drainage liquid that reaches the first passage (26). The drainage line connection structure according to claim 1, wherein the value is set to open 32). 5. The check valve chamber is provided in the damper valve (34).
The float (42) additionally provided with buoyancy by the sewage that flows back and stays in (24).
The drainage pipe connection structure described. 6. The trap portion (18) for sealing liquid has a first passage.
(26) is provided, and the trap portion (18) is provided with the drainage inlet.
(22) and the check valve chamber (24), which is located between the check valve chamber (24) and extends vertically downward, and a predetermined distance provided below the inside of the liquid sealing chamber (44). The drainage pipe connection structure according to claim 1, further comprising a partition wall (46) that hangs only. 7. The drainage inlet in the first passage (26)
A second check valve chamber (24) is provided between the (22) and the trap section (18), and the trap section (1) is provided in the second check valve chamber (24).
8) Ball valve (4 with buoyancy provided by sewage coming from
8. The drainage pipe connection structure according to claim 1, wherein the drainage line connection structure is provided. 8. The trap portion (18) for sealing liquid has a first passage.
(26), the trap portion (18) is provided with the check valve chamber.
(24) and the drainage outlet (28) are located between the liquid sealing chamber (44) extending vertically downward, and provided above the inside of the liquid sealing chamber (44) by a required distance downward. The drainage pipe connection structure according to claim 1, further comprising: a partition wall (46) that hangs down. 9. A second check valve chamber (25) is provided in the second passage (30) between the trap portion (18) and the drainage outlet (28), and the second check valve chamber (25) is provided. The chamber (25) has the drain outlet (28).
Ball valve (48) to be buoyant by sewage coming from
The drainage pipeline connection structure according to claim 8, wherein the drainage pipeline connection structure is provided.