CN204826107U - Sewage pipes prevents counterflow unit - Google Patents

Abstract

The utility model discloses a sewage pipes prevents counterflow unit, including a barrel that constitutes airtight space, has the baffle in the barrel with airtight space separation into two, there is the circulation clearance between baffle bottom and the barrel bottom the barrel top lies in wherein half the airtight spatial join has an inlet tube the airtight spatial join that the barrel bottom lies in second half has the outlet pipe, and the inlet tube is followed the barrel top and is stretched into and be connected with the duckbill valve among this sewage pipes prevents counterflow unit, and the duckbill valve is opened through rivers gravity, and when stopping the drainage, the duckbill valve is closed, prevents effectively that returning of waste gas or waste water is excessive, and then forms effective the wall, in addition, the clearance of circulating can form the liquid seal bottom the barrel, and the airtight space of two halves forms the air and cuts off, and then forms the two -stage wall, completely cuts off the inlet tube and is connected with the water route between the outlet pipe, effectively prevents the refluence of waste gas waste water.

Description

Anti-backflow device for sewage pipeline

technical field

The utility model relates to the technical field of sewage discharge devices, in particular to an anti-backflow device for sewage discharge pipes.

Background technique

In a clean room or sterilization room that requires a high air environment, when the sewage pipe of the equipment is connected to the underground sewer pipe, if there is no necessary anti-backflow device, the waste gas or waste water in the sewer pipe will easily flow back. At present, the existing anti-backflow device has complex structure and inconvenient maintenance, and it is difficult to effectively isolate the sewage pipe from the sewer pipe.

Utility model content

The technical problem to be solved by the utility model is to provide an anti-backflow device for sewage pipes that can effectively prevent backflow of waste gas and waste water.

The technical solution adopted to solve the above technical problems: an anti-backflow device for sewage pipes, which includes a cylinder forming a closed space, and a partition is provided in the cylinder to divide the closed space into two halves, and the bottom of the partition There is a communication gap between the bottom end of the cylinder body, a water inlet pipe is connected to the closed space located in one half of the top end of the cylinder body, and a water outlet pipe is connected to the closed space located in the other half of the cylinder body bottom end.

Furthermore, the outlet pipe extends from the bottom of the cylinder and is higher than the flow gap.

Further, the water inlet pipe extends from the top of the cylinder and is connected with a duckbill valve.

Further, the distance between the flow gap between the bottom end of the partition and the bottom end of the cylinder is 25-30mm, the distance from the outlet pipe to the bottom end of the cylinder is 40-50mm, and the water inlet pipe extends from the top end of the cylinder The protruding distance is 30~40mm.

Further, the top of the cylinder body is provided with a cylinder cover with a straight-through sight glass, and a sealing ring is provided between the cylinder body and the cylinder cover and connected by bolts.

Further, the cylinder body, the cylinder cover, the water inlet pipe and the water outlet pipe are all made of stainless steel, the water inlet pipe is welded to the cylinder cover, and the water outlet pipe is welded to the bottom of the cylinder body.

Beneficial effects: the water inlet pipe extends from the top of the cylinder and is connected with a duckbill valve in the sewage pipe anti-backflow device. The duckbill valve is opened by the gravity of the water flow. When the drainage is stopped, the duckbill valve is closed, effectively preventing the return of waste gas or waste water. In addition, the circulation gap can form a liquid seal at the bottom of the cylinder, and the two halves of the closed space form an air partition, thereby forming a two-stage partition, which isolates the water connection between the water inlet pipe and the water outlet pipe, and effectively prevents exhaust gas Wastewater backflow.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described further;

Fig. 1 is the schematic sectional view of the utility model embodiment;

Fig. 2 is the top view of the utility model embodiment;

Fig. 3 is a schematic diagram of the installation of the embodiment of the utility model.

Detailed ways

Referring to Fig. 1 to Fig. 3, the utility model is an anti-backflow device for sewage pipes, which includes a cylinder body 1 constituting a closed space, inside the cylinder body 1 there is a partition plate 2 to divide the closed space into two halves, and the bottom end of the partition plate 2 There is a communication gap 3 between the bottom end of the cylinder body 1 , a water inlet pipe 4 is connected to the closed space at the top half of the cylinder body 1 , and a water outlet pipe 5 is connected to the other half of the closed space at the bottom end of the cylinder body 1 .

In this embodiment, the cylinder 1 is a stainless steel cylinder with a closed bottom and an open top, a cylinder cover 6 is provided at the top of the cylinder 1, and a sealing ring is provided between the cylinder cover 6 and the cylinder 1 to effectively seal the confined space. Bolts are used between the cylinder cover 6 and the cylinder body 1 to facilitate disassembly and maintenance. There is a straight-through sight glass 7 in the middle of the cylinder cover 6 to facilitate observation and maintenance.

The middle part of the cylinder body 1 is separated by a partition plate 2 made of stainless steel, but the bottom of the cylinder body 1 is not completely cut off, that is, there is a circulation gap 3 at the bottom of the cylinder body 1, so that the two halves of the closed space are connected. Duckbill valve 8 extends into and is connected to the top of cylinder 1. Duckbill valve 8 is opened by the gravity of water flow. When drainage is stopped, duckbill valve 8 is closed to effectively prevent waste gas or waste water from overflowing and form an effective partition. In addition, the outlet pipe 5 protrudes from the bottom of the cylinder 1 and is higher than the circulation gap 3 to form a liquid seal at the bottom of the cylinder 1, and the two halves of the closed space form an air partition, thereby forming a two-stage partition.

Among them, the distance between the flow gap 3 between the bottom end of the partition plate 2 and the bottom end of the cylinder body 1 is 25-30mm, the distance from the outlet pipe 5 extending from the bottom end of the cylinder body 1 is 40-50mm, and the water inlet pipe 4 extends from the cylinder body 1 The distance that the top protrudes into is 30~40mm.

The water inlet pipe 4 is welded to the cylinder cover 6, the outlet pipe 5 is welded to the bottom of the cylinder body 1, and the port connection of the water inlet pipe 4 and the outlet pipe 5 is connected by a quick-loading connection, which is convenient for connecting the drain pipe.

The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings, but the present utility model is not limited to the above-mentioned embodiments. Various changes are made.

Claims (6)

1. An anti-backflow device for sewage pipes, characterized in that: it includes a cylinder forming a closed space, and a partition is arranged in the cylinder to separate the closed space into two halves, and the bottom of the partition is connected to the bottom of the cylinder. There is a communication gap between them, a water inlet pipe is connected to the closed space located in one half of the top end of the cylinder body, and a water outlet pipe is connected to the closed space located in the other half of the bottom end of the cylinder body. 2. The anti-backflow device for sewage pipes according to claim 1, characterized in that: the outlet pipe extends from the bottom of the cylinder and is higher than the flow gap. 3. The anti-backflow device for sewage pipes according to claim 2, characterized in that: the water inlet pipe extends from the top of the cylinder and is connected with a duckbill valve. 4. The sewage pipeline anti-backflow device according to claim 3, characterized in that: the distance between the circulation gap between the bottom end of the partition and the bottom end of the cylinder is 25-30 mm, and the outlet pipe is connected from the bottom end of the cylinder The protruding distance is 40-50 mm, and the protruding distance of the water inlet pipe from the top of the cylinder is 30-40 mm. 5. The sewage pipeline anti-backflow device according to claim 1, 2, 3 or 4, characterized in that: the top of the cylinder body is provided with a cylinder cover with a straight-through sight glass, and a cylinder cover is provided between the cylinder body and the cylinder cover. There are sealing rings and are connected by bolts. 6. The sewage pipeline anti-backflow device according to claim 5, characterized in that: the cylinder body, the cylinder cover, the water inlet pipe and the water outlet pipe are all made of stainless steel, and the water inlet pipe and the cylinder cover are welded and connected. The water outlet pipe is welded to the bottom of the cylinder body.