JP5443011B2 - Drainage pipe structure - Google Patents

Description

  The present invention relates to a drainage pipe structure, and more particularly to an improved drainage pipe structure that suppresses the flow rate and flow rate of drainage in the middle of a horizontal drainage pipe so that negative pressure does not occur in the drainage pipe.

  If a large amount of drainage from a drainage facility such as a flush toilet is flushed into the drainage pipe, the drainage pipe will be easily blocked by the drainage, and the drainage flows in this way while blocking the drainage pipe. Since negative pressure is generated in the drainage pipe upstream of the closed portion, there is a possibility that the sealing failure of the drain trap provided in the sanitary equipment facility may occur. In particular, the above phenomenon is likely to occur when miscellaneous drainage pipes from hand-washing etc. are connected to drainage pipes from flush toilets with a high drainage flow rate (drainage flow rate per unit time of sanitary equipment). In order to prevent this problem, measures such as providing a vent pipe in the middle of the drain pipe from the flush toilet and providing a Dorgo valve for preventing odor backflow at the upper end of the vent pipe are used (see Patent Document 1).

  In addition, a low tank for storing toilet drainage water is divided into a water storage chamber and an intake valve chamber, an intake pipe having an intake valve at the tip is disposed in the intake valve chamber, and the intake pipe is connected to a drain trap of the toilet bowl. There is also known one in which a trap protection function is imparted to a low tank of a toilet bowl by connecting to a downstream drainage pipe (Patent Document 2).

JP 2003-96892 A JP 2002-106017 A

  However, in the case of preventing the sealing failure of the flush toilet by means such as Patent Document 1, the work of connecting and piping the vent pipe in the middle of the drain pipe is troublesome, and an intake valve such as a Dorgo valve is also necessary Therefore, there is a problem that the cost is increased.

  In addition, as in Patent Document 2, the toilet tank provided with a trap protection function has a simple structure of the drainage pipe itself, but the structure of the low tank is complicated, which also increases the cost. There is a problem.

  The present invention has been made under the above circumstances, and the problem to be solved is to eliminate the need for conventional vent pipes and intake valves and to actively stagnate the drainage in the middle of the lateral drain pipe of the drain pipe. To provide a drainage pipe structure that can control the drainage flow velocity and flow rate and prevent the drainage trap from being damaged due to the occurrence of negative pressure in the drainage pipe, and the pipe joint used therefor It is in.

In order to solve the above-mentioned problems, the drainage pipe structure according to the present invention has a reduced size having an opening area smaller than the opening area of the horizontal drainage pipe in the middle of the horizontal drainage pipe of the drainage pipe that drains the drainage from the drainage facility. only setting the tube portion, and is characterized in that the upstream portion of the reduced pipe portion immediately before the horizontal drainage pipe, provided with a hollow bulge portion bulging upward and / or sideways.

  In the drainage pipe structure of the present invention, the height of the inner bottom surface of the upstream portion from the contraction portion of the horizontal drainage pipe is not less than the height of the inner bottom surface of the contraction pipe portion of the horizontal drainage pipe, The height of the inner bottom surface of the downstream portion of the contracted tube portion is equal to or less than the height of the inner bottom surface of the contracted tube portion of the horizontal drain pipe, and the inner bottom surface of the upstream portion, the inner bottom surface of the contracted tube portion, and the downstream portion. It is desirable that the inner bottom surface is continuous so as not to cause a step. Here, the “inner bottom surface” of the horizontal drainage pipe or the contraction pipe portion means an inner surface region directly below the center line of the horizontal drainage pipe or the contraction pipe portion.

On the other hand, the pipe joint according to the present invention is a pipe joint used for connection between the upstream part and the downstream part of the horizontal drain pipe, and an upstream connection port to which the upstream part of the horizontal drain pipe is connected, e Bei and downstream connection port downstream portion of the drainage pipe is connected, and a reduced pipe portion smaller than the opening area of these connecting ports mutual opening area horizontal drainage pipe formed between the said upstream A hollow bulging portion that bulges upward and / or laterally is formed between the side connection port and the contraction tube portion .

Like the drainage pipe structure of the present invention, a contraction pipe portion having an opening area smaller than the opening area of the horizontal drainage pipe is provided in the middle of the drainage pipe of the drainage pipe that drains the drainage from the drainage facility. Part of the drainage that has flowed from the drainage facility, for example, a sanitary appliance facility such as a flush toilet, to the middle of the horizontal drainage pipe, cannot flow downstream through the narrowed pipe portion with a small opening area, It becomes stagnant in the upstream part before the contraction part of the horizontal drainage pipe. Thus, when the drainage stagnates in the upstream part of the horizontal drainage pipe, the flow rate and flow rate of the drainage flowing through the contracted pipe part to the downstream part of the horizontal drainage pipe is suppressed, and the peak of the instrument drainage flow rate is eased. Since it disappears, even if a large amount of drainage is forced to flow from a sanitary appliance facility such as a flush toilet at one time, it becomes difficult to block the drainage pipe on the downstream side from the contraction part. Accordingly, since negative pressure is unlikely to occur in the drainage pipe, it is possible to prevent the drainage trap of a drainage facility such as a sanitary ware facility from being damaged by the negative pressure. Further, in addition to the above-described effects, by providing a hollow bulging portion that bulges upward and / or laterally in the upstream portion immediately before the contraction portion of the horizontal drainage pipe, the contraction portion of the horizontal drainage pipe Since the drainage stagnated in the immediately upstream part immediately stays in the hollow bulge, it is possible to prevent the backflow of the drainage, and the drainage pipe upstream from the contraction is not easily filled. Therefore, it is possible to prevent the drainage trap of the drainage equipment such as the sanitary equipment from being sealed by the siphon phenomenon.

  As described above, the drainage pipe structure of the present invention is provided with a contraction pipe part in the middle of the horizontal drainage pipe so as to suppress the closure of the drainage pipe and the generation of negative pressure, thereby preventing the sealing of the drainage trap of the drainage facility. Therefore, the sealing pipe destruction prevention vent pipe and intake valve as described in Patent Document 1 are completely unnecessary, and construction cost can be saved and workability can be improved.

  And the height of the inner bottom surface of the upstream side portion from the contracted portion of the horizontal drainage pipe is not less than the height of the inner bottom surface of the contracted tube portion of the horizontal drainage pipe, The height of the inner bottom surface is less than or equal to the height of the inner bottom surface of the contracted portion of the horizontal drainage pipe, and there is a step between the inner bottom surface of the upstream portion, the inner bottom surface of the contracted tube portion, and the inner bottom surface of the downstream portion. The continuous drainage pipe structure has a flow gradient over the entire horizontal drainage pipe and there is no step on the inner bottom surface, so drainage and solid matter in drainage may remain in the horizontal drainage pipe. Therefore, there is no fear of causing inconveniences such as residual solid matter becoming a source of odor and insects and causing drainage pipes to be blocked.

Moreover, when the pipe joint of the present invention is used and the respective upstream end portion and downstream end portion of the horizontal drainage pipe of the drainage pipe are inserted and connected to the upstream connection port and the downstream connection port, In the middle of the horizontal drainage pipe of the pipe line, a hollow that bulges upward and / or laterally in a contraction pipe part having an opening area smaller than the opening area of the horizontal drainage pipe and an upstream part immediately before the contraction pipe part The drainage pipe structure of the present invention provided with the bulging portion can be easily constructed.

It is explanatory drawing of the drain pipe line structure which concerns on the reference form of this invention. It is principal part sectional drawing of the drainage pipe structure. It is a perspective view of a pipe joint concerning a reference form of the present invention used for the drainage pipe line structure. It is a principal part top view of the drain pipe structure concerning one embodiment of the present invention. FIG. 5 is a longitudinal sectional view taken along line AA in FIG. 4. FIG. 5 is a cross-sectional view taken along line B-B in FIG. 4. It is the CC sectional view taken on the line of FIG. It is a perspective view of a pipe joint concerning one embodiment of the present invention used for the drainage pipe line structure. It is a cross-sectional view of another pipe joint of the present invention.

  FIG. 1 exemplifies a drainage pipe structure for flowing drainage from a flush toilet. 1 shows a Western flush toilet installed on a floor surface 2 of a toilet. A toilet bowl portion 1a, a drain trap portion 1b for preventing odor backflow, and a drain passage portion 1c on the downstream side thereof are formed continuously. A vertical drain pipe 4 under the floor is connected to the lower end of the drain passage 1c via a connection adapter 3 attached to the floor surface 2. The horizontal drain pipe 4 and the horizontal drain pipe piped under the floor 5 is connected via a right angle elbow joint 6. The horizontal drainage pipe 5 is also connected to a miscellaneous drainage pipe 8 from another drainage facility such as a hand-washing 7.

  As shown in FIG. 1 and FIG. 2, a pipe joint 51 is arranged in the middle of the horizontal drain pipe 5, and the upstream part 5 a and the downstream part 5 b of the horizontal drain pipe 5 are connected via this pipe joint 51. Yes. And by this pipe joint 51, a contracted pipe portion 51 c having an opening area smaller than the opening area of the horizontal drain pipe 5 is provided in the middle of the horizontal drain pipe 5.

  The pipe joint 51 is an injection molded product of synthetic resin, and as shown in FIGS. 2 and 3, an upstream connection port 51a to which the end of the upstream portion 5a of the horizontal drain pipe 5 is inserted and connected, The downstream connection port 51b into which the end of the downstream portion 5b of the drainage pipe 5 is inserted and connected, and the opening area formed between these connection ports 51a and 51b is smaller than the opening area of the horizontal drainage pipe 5 And a contracted tube portion 51c.

  The contracted pipe portion 51c of the pipe joint 51 is formed to be eccentric downward with respect to the upstream side connection port 51a and the downstream side connection port 51b, and as shown in FIG. 2, the upstream side connection port of the pipe joint 51 In a state where the upstream end portion 5a and the downstream portion 5b of the horizontal drain pipe 5 are inserted and connected to the downstream connection port 51b, the inner bottom surface 5c of the upstream portion 5a of the horizontal drain pipe 5 is compressed. The inner bottom surface 51d of the pipe portion 51c and the inner bottom surface 5d of the downstream portion 5b of the horizontal drain pipe 5 are continuous without causing a step.

  In the horizontal drainage pipe 5 in which the upstream portion 5a and the downstream portion 5b are connected by the pipe joint 51, the height of the inner bottom surface 5c of the upstream portion 5a is equal to or higher than the height of the inner bottom surface 51d of the contracted tube portion 51c. The height of the inner bottom surface 5d of the downstream portion 5b of the horizontal drain pipe 5 is equal to or less than the height of the inner bottom face 51d of the contracted pipe portion 51c, so that an appropriate flow gradient (1/100 to 3) is obtained throughout the horizontal drain pipe 5. It is piped under the floor so as to have a / 100 flow gradient).

  In the drainage pipe structure in which the contracted pipe portion 51c is provided in the middle of the horizontal drainage pipe 5 as described above, when a large amount of drainage is passed from the flush toilet 1 to the horizontal drainage pipe 5 through the vertical drainage pipe 4, a part of the drainage is It becomes impossible to pass through the contracted pipe portion 51 c having a small opening area, and it becomes stagnant in the upstream portion 5 a from the contracted pipe portion 51 c of the horizontal drain pipe 5. When the drainage stagnates in the upstream portion 5a of the horizontal drainage pipe 5 in this way, the flow rate and flow rate of the drainage that passes through the contracted pipe portion 51c and flows to the downstream side portion 5b of the lateral drainage pipe 5 are suppressed. Since the peak of the apparatus drainage flow rate is eased and disappeared, even if a large amount of drainage is vigorously flowed from the flush toilet 1 at once, the drainage pipeline is less likely to be blocked at the downstream side portion from the contracted tube portion 51c. Accordingly, it is difficult for negative pressure to be generated in the drain pipe, so that the drain trap 1b of the flush toilet 1 and the drain trap 7a of the hand wash 7 can be prevented from being sealed by negative pressure.

  Moreover, this drainage pipe structure uses the pipe joint 51, and the upstream side connection port 51a and the downstream side connection port 51b thereof have respective end portions of the upstream side portion 5a and the downstream side portion 5b of the horizontal drainage pipe 5. Can be easily constructed by connecting the pipes and providing the contracted pipe part 51c in the middle of the horizontal drain pipe 5, and the conventional vent pipe and intake valve for preventing the sealing water breakage are completely unnecessary. And improvement of workability can be achieved. In addition, the horizontal drainage pipe has an appropriate flow gradient over its entire length, and there is no step on the inner bottom surface, so there is no residual drainage or solid matter in the drainage pipe. There is no fear of causing inconveniences such as solid matter becoming a source of odors and insects, or causing drainage pipes to be blocked.

  The opening area of the contracted pipe portion 51c of the pipe joint 51 is not particularly limited as long as it is smaller than the opening area of the horizontal drainage pipe 5, but if it is too small, the flow of drainage is extremely deteriorated and is upstream of the contracted pipe portion 51c. There is a risk that the drainage pipe on the side will be full and the drainage trap 1b of the flush toilet 1 will be sealed by the siphon phenomenon. Further, when the opening area of the contracted pipe portion 51c is not so different from the opening area of the horizontal drain pipe 5, the effect of suppressing the flow rate and flow rate of the drainage becomes insufficient. Therefore, it is appropriate that the opening area of the contracted pipe portion 51 c is about 1/2 to 4/5 of the opening area of the horizontal drain pipe 5.

  Moreover, there is no restriction | limiting in particular about the opening shape of the contraction pipe part 51c, For example, what is necessary is just to set it as the opening shape through which the solid substance in waste_water | drain passes easily, such as circular and an ellipse.

Next, a drainage pipe structure according to an embodiment of the present invention will be described with reference to FIGS.

  The drainage pipe structure of this embodiment is a pipe joint different from the pipe joint 51 between the upstream side portion 5a and the downstream side portion 5b of the horizontal drainage pipe 5, as shown in the plan view of the main part of FIG. 52 is disposed and connected to provide a contraction pipe portion 52c having an opening area smaller than the opening area of the horizontal drainage pipe in the middle of the horizontal drainage pipe 5, and immediately before the contraction pipe portion 52c of the horizontal drainage pipe 5. A hollow bulging portion 52e that bulges to both sides is provided in the upstream portion.

  As shown in FIGS. 4, 5, and 8, the pipe joint 52 includes an upstream connection port 52 a into which the end of the upstream portion 5 a of the horizontal drain pipe 5 is inserted and connected, and a downstream of the horizontal drain pipe 5. The downstream connection port 52b in which the end portion of the side portion 5b is inserted and connected, and the opening area formed continuously to the downstream connection port 52b between these connection ports 52a and 52b is larger than the opening area of the horizontal drainage pipe 5. 5 includes a small contracted tube portion 52c and a hollow bulging portion 52e formed between the contracted tube portion 52c and the upstream connection port 52a and bulged on both the left and right sides, as shown in FIG. Thus, the contracted tube portion 52c is formed to be eccentric downward with respect to the downstream connection port 52b and the hollow bulged portion 52e, and the inner bottom surface 52d of the contracted tube portion 52c and the inner bottom surface 52f of the hollow bulged portion 52e are formed. It is lined up flush. And if each edge part of the upstream part 5a and the downstream part 5b of the horizontal drain pipe 5 is connected to the upstream connection port 52a and the downstream connection port 52b of this pipe joint 52, the upstream part of the horizontal drain pipe 5 The inner bottom surface 5c of 5a, the inner bottom surfaces 52f and 52d of the hollow bulging portion 52e and the contracted tube portion 52c, and the inner bottom surface 5d of the downstream portion 5b of the horizontal drainage pipe 5 are continuous without causing a step. The drainage pipe 5 is provided with an appropriate flow gradient and is piped under the floor.

  The above-mentioned hollow bulging portion 52e temporarily retains the waste water stagnating in the upstream portion 5a immediately before the contracted pipe portion 52c of the horizontal drain pipe 5, thereby preventing the backflow of drainage or upstream of the contracted pipe portion 52c. It serves to prevent the drainage pipe on the side from becoming full. The hollow bulging portion 52e in this embodiment is formed in a hollow bulging portion having an oval cross-sectional shape that bulges on both the left and right sides as shown in FIG. 6, and a contraction tube of the hollow bulging portion 52e. By making the end surface on the side of the portion 52c into a tapered curved surface as shown in FIGS. 4 and 8, the wastewater temporarily accumulated in the hollow bulging portion 52c smoothly passes through the contracted tube portion 52c and then horizontally. It is made to flow to the downstream part 5b of the drain pipe 5. The hollow bulging portion may bulge to the left or right, or may bulge upward. In short, the hollow bulging portion only needs to have a capacity capable of temporarily retaining the waste water that bulges upward and / or laterally and stagnates immediately before the contracted portion 52c of the horizontal drainage pipe. .

  In the pipe joint 52, the bottom surface of the hollow bulging portion 52e is formed as a flat surface. However, like the pipe joint 53 shown in FIG. 9, the bottom surface 53g of the hollow bulging portion 53e is directed from both sides toward the center. It may be formed in a flat V shape that descends. With such a V-shaped bottom surface 53g, the solid matter in the drainage collects at the center of the hollow bulging portion 52e and flows downstream through the contracted tube portion 52c, so that the solid matter flows into the hollow bulging portion 53e. There exists an advantage which can prevent remaining on the bottom face 53g.

  The pipe joint 52 may be formed by integrally molding with a synthetic resin. However, in order to facilitate die cutting, the pipe joint 52 is formed by being divided into two parts between a hollow bulging part 52e and a contracted pipe part 52c. It is preferable that the two are joined and integrated.

  By connecting the upstream side portion 5a and the downstream side portion 5b of the horizontal drainage pipe 5 through such a pipe joint 52, a contracted pipe portion 52c is provided in the middle of the horizontal drainage pipe 5, and a hollow bulge is just before that. In addition to the above-described effects, the drainage pipe structure provided with the portion 52e temporarily retains the wastewater stagnant in the upstream portion immediately before the contracted tube portion 52c in the hollow bulging portion 52e. In addition, since the drainage pipe upstream of the contracted pipe portion 52e is unlikely to be filled with water, it is possible to prevent the drainage trap 1b of the flush toilet 1 from being sealed due to the siphon phenomenon. Be able to.

1 Flush toilet (drainage equipment)
1b Drain trap part of flush toilet 4 Vertical drain pipe 5 Horizontal drain pipe 5a Upstream part of horizontal drain pipe 5b Downstream part of horizontal drain pipe 5c Inner bottom surface of upstream part of horizontal drain pipe 5d Downstream part of horizontal drain pipe Inner bottom surface 51, 52, 53 Pipe joint 51a, 52a Pipe joint upstream connection port 51b, 52b Pipe joint downstream connection port 51c, 52c Constriction pipe part 51d, 52d Conduit part inner bottom face 52e Hollow bulge part

Claims (3)

In the middle of the drain line next to the drain pipe of the flowing waste water from drainage, only setting the reduced pipe portion having a smaller opening area than the opening area of the lateral drainage pipe, upstream of the reduced pipe portion immediately before the horizontal drainage pipe A drainage pipe structure characterized in that a hollow bulge that bulges upward and / or laterally is provided on a side portion .   The height of the inner bottom surface of the upstream side portion from the contracted portion of the horizontal drainage pipe is equal to or higher than the inner bottom surface of the contracted tube portion of the horizontal drainage pipe, and the inner bottom surface of the downstream portion from the contracted portion of the horizontal drainage pipe. The height of the horizontal drainage pipe is equal to or lower than the height of the inner bottom surface of the contracted portion of the horizontal drainage pipe so that no step is generated between the inner bottom surface of the upstream portion, the inner bottom surface of the contracted portion, and the inner bottom surface of the downstream portion. The drainage pipe structure according to claim 1, wherein the drainage pipe structure is continuous. A pipe joint used for connection between the upstream side portion and the downstream side portion of the horizontal drainage pipe, wherein the upstream connection port to which the upstream side portion of the horizontal drainage pipe is connected and the downstream side portion of the horizontal drainage pipe are connected between the downstream connection port, and these Bei give a, a condensation pipe section smaller than the opening area of the opening area transverse drainage tube formed therebetween connection port, the upstream-side connection port and the reduced pipe portion And a hollow bulging portion that bulges upward and / or laterally .

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