PVC ventilation drain pipe

Abstract

The utility model provides a PVC ventilation drainage pipe, and belongs to the technical field of building water pipes. The problem that in the prior art, an exhaust pipe is poor in ventilation effect is solved. The PVC ventilation drainage pipe comprises a drainage pipe, a ventilation pipe and a connecting pipe for connecting the drainage pipe and the ventilation pipe, the connecting pipe is provided with an air inlet port communicated with the drainage pipe and an air outlet port communicated with the ventilation pipe, and a separation check block is arranged in the drainage pipe, is in a big-end-down shape and is located above the air inlet port. The PVC ventilation drain pipe has the advantage that the ventilation effect of the PVC ventilation drain pipe can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of building water pipes and relates to a PVC ventilation drain pipe. Background Art

[0002] At present, pipes for drainage and ventilation are usually arranged in residential buildings. For example, a Chinese patent document discloses an H-shaped drainage and ventilation pipe (application number: 201020258312.X), which includes a drainage pipe, a ventilation pipe, and a connecting pipe. One end of the connecting pipe is connected to the drainage pipe, and the other end is connected to the ventilation pipe. The three are connected into an H shape. The included angle formed by the connection of the connecting pipe and the upper end of the drainage pipe is an acute angle, and the included angle formed by the connection of the connecting pipe and the upper end of the ventilation pipe is an obtuse angle. Interfaces are provided at both ends of the drainage pipe and the ventilation pipe.

[0003] The following deficiencies exist in the use of the H-shaped drainage and ventilation pipe: Both the drainage pipe and the ventilation pipe of the H-shaped drainage and ventilation pipe are vertically arranged. During drainage, the water flow in the drainage pipe will form a water film attached to the pipe wall under the combined action of air resistance and pipe wall resistance, and the water film will block the port of the connecting pipe at the ventilation pipe end, thereby resulting in poor ventilation effect of the ventilation pipe. Summary of the Invention

[0004] The purpose of the utility model is to provide a PVC ventilation drain pipe in view of the above problems existing in the prior art. The technical problem to be solved by the utility model is how to improve the ventilation effect of the PVC ventilation drain pipe.

[0005] The purpose of the utility model can be achieved by the following technical solutions:

[0006] A PVC ventilation drain pipe includes a drainage pipe, a ventilation pipe, and a connecting pipe connecting the drainage pipe and the ventilation pipe. The connecting pipe has an air inlet port communicating with the drainage pipe and an air outlet port communicating with the ventilation pipe. The drainage pipe is characterized in that a separation block is arranged in the drainage pipe. The separation block is in a shape with a smaller upper part and a larger lower part and is located above the air inlet port.

[0007] By arranging a separation block with a smaller upper part and a larger lower part in the drainage pipe at a position above the air inlet port in the PVC ventilation drain pipe, the water film moving along the wall formed when the water flows downward in the drainage pipe is separated to both sides when passing through the separation block, ensuring that there is no water film blocking at the air inlet port of the connecting pipe during the drainage process, effectively balancing the air pressure fluctuation, and thus improving the ventilation effect of the PVC ventilation drain pipe.

[0008] In the above-mentioned PVC vent drain pipe, the separation block has a flow splitting surface at its top and diversion surfaces on both sides respectively. The flow splitting surface is an arc surface. The top edges of the two diversion surfaces are respectively connected to the two side edges of the flow splitting surface, and the bottom edges of the two diversion surfaces respectively extend to the upper edge of the air inlet port. By providing the flow splitting surface and the diversion surfaces on the separation block, it is possible to better guide the water film moving along the wall to separate to both sides when passing through the separation block, thereby ensuring that there is no water film blocking the air inlet port of the connecting pipe during the drainage process, and further improving the ventilation effect of the PVC vent drain pipe.

[0009] In the above-mentioned PVC vent drain pipe, the middle part of the separation block has a notch groove with an opening facing downwards, and the notch groove is in a shape that is smaller at the top and larger at the bottom. By providing the notch groove in a shape that is smaller at the top and larger at the bottom, it is possible to ensure that there is no water film blocking the air inlet port of the connecting pipe during the drainage process, thereby improving the ventilation effect of the PVC vent drain pipe.

[0010] In the above-mentioned PVC vent drain pipe, the notch groove is in an inverted V shape, and the lower edge of the separation block is flush with the upper edge of the air inlet port. By providing the notch groove in an inverted V shape, it is possible to further ensure that there is no water film blocking the air inlet port of the connecting pipe during the drainage process. At the same time, by setting the lower edge of the separation block to be flush with the upper edge of the air inlet port, it is possible to prevent the separation block from blocking the air inlet port, enabling the gas in the drain pipe to be better discharged to the vent pipe through the connecting pipe, and improving the ventilation effect of the PVC vent drain pipe.

[0011] In the above-mentioned PVC vent drain pipe, there are two drain pipes located on both sides of the vent pipe respectively, and the included angle formed by the connecting pipe and the upper end of the drain pipe is an acute angle, and the included angle formed by the connecting pipe and the lower end of the vent pipe is an acute angle. By providing two drain pipes respectively for discharging sewage and wastewater, a sewage-wastewater separation effect is formed. At the same time, by setting the connecting pipe to be inclined downwards, it is possible to prevent the sewage or wastewater in the drain pipe from flowing back into the vent pipe through the connecting pipe.

[0012] In the above-mentioned PVC vent drain pipe, the drain pipe, the vent pipe, and the connecting pipe are located on the same plane. By setting the drain pipe, the vent pipe, and the connecting pipe on the same plane, the space utilization rate can be improved, and the required installation space can be saved.

[0013] In the above-mentioned PVC ventilation drain pipe, the drain pipe, the ventilation pipe and the connecting pipe are of an integrally formed structure. Both ends of the drain pipe respectively have interface grooves I, and both ends of the ventilation pipe respectively have interface grooves II. The integrally formed structure of the drain pipe, the ventilation pipe and the connecting pipe can, on the one hand, improve the structural strength of the PVC ventilation drain pipe itself, and on the other hand, eliminate the need for additional installation operations during construction, effectively improving the construction efficiency. By respectively arranging interface grooves I at both ends of the drain pipe and interface grooves II at both ends of the ventilation pipe, it is convenient to connect the PVC ventilation drain pipe to the pipeline and enhance the connection stability.

[0014] Compared with the prior art, the advantages of this PVC ventilation drain pipe are as follows: By arranging a separation block with a shape that is smaller at the top and larger at the bottom at the position above the air inlet port inside the drain pipe, when the water in the drain pipe flows downward, the water film moving along the wall is separated to both sides when passing through the separation block, ensuring that there is no water film blocking the air inlet port of the connecting pipe during the drainage process, effectively balancing the air pressure fluctuation, and thus enhancing the ventilation effect of the PVC ventilation drain pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of this PVC ventilation drain pipe.

[0016] Figure 2 is a cross-sectional view of this PVC ventilation drain pipe.

[0017] Figure 3 is a three-dimensional structural schematic diagram of the top view of this PVC ventilation drain pipe.

[0018] Figure 4 is a three-dimensional structural schematic diagram of the bottom view of this PVC ventilation drain pipe.

[0019] Figure 5 is a structural schematic diagram of the top view of this PVC ventilation drain pipe.

[0020] Figure 6 is Figure 5 a partial enlarged view of part A in

[0021] In the figure, 1. Drain pipe; 1a. Separation block; 1a1. Flow splitting surface; 1a2. Flow guiding surface; 1a3. Notch groove; 1b. Interface groove I; 2. Ventilation pipe; 2a. Interface groove II; 3. Connecting pipe; 3a. Air inlet port; 3b. Air outlet port. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following are specific embodiments of the present invention in combination with the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0023] A PVC ventilation drain pipe, referring to Figures 1-6 , comprising a drain pipe 1, a ventilation pipe 2, and a connecting pipe 3 connecting the drain pipe 1 and the ventilation pipe 2. The connecting pipe 3 has an air inlet port 3a communicating with the drain pipe 1 and an air outlet port 3b communicating with the ventilation pipe 2. Specifically, there are two drain pipes 1, which are respectively located on both sides of the ventilation pipe 2, and the included angle formed by the connecting pipe 3 and the upper end of the drain pipe 1 is an acute angle, and the included angle formed by the connecting pipe 3 and the lower end of the ventilation pipe 2 is an acute angle; a separation block 1a is provided inside the drain pipe 1, and the separation block 1a is in a shape with a smaller upper part and a larger lower part and is located above the air inlet port 3a.

[0024] Specifically, referring to Figure 3 , Figure 4 , Figure 5 and Figure 6 , the separation block 1a has a flow splitting surface 1a1 at its top and diversion surfaces 1a2 on both sides respectively. The flow splitting surface 1a1 is an arc surface, the top edges of the two diversion surfaces 1a2 are respectively connected to the two side edges of the flow splitting surface 1a1, and the bottom edges of the two diversion surfaces 1a2 respectively extend to the upper edge of the air inlet port 3a.

[0025] In this embodiment, it is preferred that the drain pipe 1, the ventilation pipe 2, and the connecting pipe 3 are located on the same plane; it is preferred that the drain pipe 1, the ventilation pipe 2, and the connecting pipe 3 are of an integrally formed structure. Both ends of the drain pipe 1 respectively have interface grooves 1b, and both ends of the ventilation pipe 2 respectively have interface grooves 2a.

[0026] Furthermore, referring to Figure 3 and Figure 4 , a notch groove 1a3 with an opening facing downwards is provided in the middle of the separation block 1a, and the notch groove 1a3 is in a shape with a smaller upper part and a larger lower part. In this embodiment, it is preferred that the notch groove 1a3 is in an inverted V shape, and the lower edge of the separation block 1a is flush with the upper edge of the air inlet port 3a.

[0027] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A PVC ventilation drainage pipe, comprising a drainage pipe (1), a ventilation pipe (2) and a connecting pipe (3) connecting the drainage pipe (1) and the ventilation pipe (2), wherein the connecting pipe (3) has an air inlet port (3a) connected to the drainage pipe (1) and an air outlet port (3b) connected to the ventilation pipe (2), characterized in that: The drainage pipe (1) has a separation block (1a) in it. The separation block (1a) is in a shape that is small at the top and large at the bottom and is located above the air inlet port (3a).

2. A PVC ventilation and drainage pipe according to claim 1, characterized in that: The separation block (1a) comprises a flow dividing surface (1a1) located at the top thereof and flow guiding surfaces (1a2) located at both sides thereof, the flow dividing surface (1a1) being an arc surface, the top edges of the two flow guiding surfaces (1a2) being respectively connected to the two side edges of the flow dividing surface (1a1), and the bottom edges of the two flow guiding surfaces (1a2) respectively extending to the upper edge of the air inlet port (3a).

3. A PVC ventilation and drainage pipe according to claim 1, characterized in that: The middle part of the separation stopper (1a) has a notch groove (1a3) with its opening facing downward, and the notch groove (1a3) is in a shape of being smaller at the top and larger at the bottom.

4. A PVC ventilation and drainage pipe according to claim 3, characterized in that: The notch groove (1a3) is in an inverted V shape, and the lower edge of the separation block (1a) is arranged flush with the upper edge of the air inlet port (3a).

5. A PVC ventilation and drainage pipe according to claim 1 or 2 or 3 or 4, characterized in that: There are two drainage pipes (1) and they are respectively located on both sides of the ventilation pipe (2); the angle formed by the connecting pipe (3) and the upper end of the drainage pipe (1) is an acute angle, and the angle formed by the connecting pipe (3) and the lower end of the ventilation pipe (2) is also an acute angle.

6. A PVC ventilation and drainage pipe according to claim 5, characterized in that: The drainage pipe (1), the ventilation pipe (2) and the connecting pipe (3) are located on the same plane.

7. A PVC ventilation and drainage pipe according to claim 5, characterized in that: The drainage pipe (1), the ventilation pipe (2) and the connecting pipe (3) are an integrally formed structure; the two ends of the drainage pipe (1) respectively have an interface groove 1 (1b); and the two ends of the ventilation pipe (2) respectively have an interface groove 2 (2a).

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