Pressure drainage system for preventing external rainwater from flowing backwards

Abstract

The utility model discloses a pressure drainage system for preventing external rainwater from flowing backwards. The pressure drainage system mainly comprises a water collecting pit, a drainage pump, a flexible joint, a check valve, a gate valve, an anti-backflow pipe, a pressure drainage vertical pipe, a pressure drainage transverse pipe and an outdoor rainwater inspection well. The drainage device is characterized in that the drainage pump is arranged in the sump, one end of the pressure drainage vertical pipe is connected with a drainage outlet of the drainage pump, the other end of the pressure drainage vertical pipe is connected with the pressure drainage transverse pipe, and the soft connector, the check valve and the gate valve are sequentially installed on the pressure drainage vertical pipe from near to far away from the drainage pump. The anti-backflow pipe is connected to the pressure drainage transverse pipe extending out of the room, and the pressure drainage transverse pipe is finally connected to an outdoor rainwater inspection well. The pressure drainage system has the advantages that outdoor rainwater can be effectively prevented from flowing backwards into a building with the elevation lower than the outdoor ground along the pressure drainage pipe due to the fact that a check valve on the pressure drainage pipe fails, and meanwhile the system is simple in principle, easy to construct and install, free of influence on manufacturing cost and convenient to use and popularize on a large scale.

Description

Technical Field

[0001] The utility model belongs to the technical field of drainage, and specifically relates to a pressure drainage system for preventing external rainwater from flowing back. Background Art

[0002] With the vigorous development of my country's construction industry, the safety and efficiency of flood control and drainage systems have also attracted much attention. It is well known that some underground buildings with indoor ground elevations lower than outdoor ground elevations are under great threat of flood disasters. Although the flood control of underground buildings will be considered in detail by the architectural and general drawing professionals during the design process, some practitioners of water supply and drainage have a weak understanding of underground building flood control, so they often ignore this link in the design of underground building pressure drainage systems, resulting in the phenomenon of underground buildings in my country being flooded by pressure drainage pipes during the rainy season. Generally speaking, underground buildings often have one or more of a garage, a water supply pump room, a fire pump room, and a transformer substation. These are important functional rooms or venues. Once soaked in water, it will not only have a significant impact on people's normal work and life, but also may cause electric shock accidents. Therefore, in order to eliminate the above safety hazards, it is very necessary to design a pressure drainage system to prevent external rainwater from backflowing.

[0003] The current popular practice is to set a check valve on the pressure drainage outlet pipe, or the local height of the drainage horizontal main pipe is higher than the outdoor floor. However, it was found in actual operation and management that both methods have problems. Setting a check valve on the pressure drainage outlet pipe is the most common practice, but due to the infrequent pressure-boosting drainage of the drainage pump in the underground building sump, and the poor quality of the drainage water, the check valve often fails to function or is stuck and loses its function. The local height of the drainage horizontal main pipe is higher than the outdoor floor, which can completely prevent the outdoor rainwater from flowing back due to the pressure drainage pipe problem in the underground building, but the practice of some pipe sections being higher than the floor greatly affects the appearance and is rejected by most parties A. The utility model relates to a pressure drainage system for preventing external rainwater from flowing back, which superimposes the two functions and, under the premise of ensuring the covering soil, raises the local height of the pressure drainage horizontal main pipe as much as possible. The advantage of this is that a double insurance is set to deal with the problem of backflow of the pressure drainage outlet pipe, and the probability of rainwater backflow caused by the underground building pressure drainage system set by the water supply and drainage professional is greatly reduced without affecting the appearance of the floor. Utility Model Content

[0004] In view of the defects of the prior art, the utility model provides a pressure drainage system for preventing the backflow of external rainwater, with the purpose of optimizing the current pressure drainage system of underground buildings and significantly improving its ability to prevent the backflow of rainwater into underground buildings.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a pressure drainage system for preventing external rainwater from flowing back, mainly comprising a sump (01), a drainage pump (02), a flexible joint (03), a check valve (04), a gate valve (05), an anti-backflow pipe (06), a pressure drainage riser (07), a pressure drainage transverse pipe (08), and an outdoor rainwater inspection well (09); wherein the drainage pump (02) is arranged in the sump (01), one end of the pressure drainage riser (07) is connected to the discharge port of the drainage pump (02), and the other end is connected to the pressure drainage transverse pipe (08), the flexible joint (03), the check valve (04), and the gate valve (05) are installed on the pressure drainage riser (07) in order from near to far from the drainage pump, the anti-backflow pipe (06) is connected to the pressure drainage transverse pipe (08) extending out of the outdoor part, and the pressure drainage transverse pipe (08) is finally connected to the outdoor rainwater inspection well (09).

[0006] The utility model discloses a pressure drainage system for preventing backflow of external rainwater, wherein the sump (01) should satisfy the requirement that the drainage pump (02) is opened no more than 6 times within one hour.

[0007] The utility model discloses a pressure drainage system for preventing external rainwater from flowing back, wherein the drainage pump (02) is a common submersible pump.

[0008] The utility model discloses a pressure drainage system for preventing external rainwater from flowing back, wherein the flexible joint (03), the check valve (04), the gate valve (05) have the same diameter as the pressure drainage riser (07) and the pressure drainage transverse pipe (08).

[0009] The utility model discloses a pressure drainage system for preventing backflow of external rainwater, wherein the backflow prevention pipe (06) has the same diameter and the same material as the pressure drainage riser (07) and the pressure drainage transverse pipe (08).

[0010] The utility model discloses a pressure drainage system for preventing backflow of external rainwater, wherein the backflow prevention pipe (06) is an upward P-shaped bend and is buried in the covering soil together with the pressure drainage transverse pipe (08).

[0011] The utility model discloses a pressure drainage system for preventing external rainwater backflow, wherein a flexible waterproof sleeve is arranged at the wall-penetrating portion of the pressure drainage transverse pipe (08), and the rear portion of the anti-backflow pipe (06) slopes downward toward an outdoor rainwater inspection well (09).

[0012] The utility model discloses a pressure drainage system for preventing backflow of external rainwater. The backflow prevention pipe (06) is essentially a part of the pressure drainage transverse pipe (08) and has the same service life as the pressure drainage transverse pipe (08).

[0013] The utility model discloses a pressure drainage system to prevent backflow of external rainwater, wherein the backflow prevention pipe (06) is the technical core of the utility model, and its design inspiration comes from the P-type bend drainage accessory of sanitary ware. The raised part of the P-type bend of the sanitary ware is installed downward, and the internal water seal can effectively prevent the dirty air in the drainage pipe from entering the room through the sanitary ware; and the anti-backflow pipe (06) of the utility model has the same appearance as the P-type bend drainage accessory, and the raised part is installed upward, and the internal "air seal" can effectively prevent the rainwater in the outdoor rainwater pipe from entering the underground building through the pressure drainage horizontal pipe (08).

[0014] The utility model discloses a pressure drainage system for preventing backflow of external rainwater. Only when the water surface of the outdoor rainwater inspection well (09) is close to being level with the ground, the outdoor rainwater will pass through the anti-backflow pipe (06) and enter the pressure drainage riser (07). The pressure drainage riser (07) is provided with a check valve (04), which can still prevent the possibility of outdoor rainwater entering the interior of the underground building. In fact, under the premise that the outdoor rainwater pipeline is reasonably designed and well maintained, the water level in the outdoor rainwater inspection well cannot reach a state close to being level with the ground. Only when the outdoor rainwater passes through the anti-backflow pipe (06) and the check valve (04) also fails, will the phenomenon of outdoor rainwater entering the underground building through the pressure drainage system occur. However, this probability is extremely small.

[0015] The utility model discloses a pressure drainage system for preventing backflow of external rainwater, and its beneficial effects are as follows: it respects the design method of the traditional pressure drainage system of underground buildings, has no complicated mechanical structure, is highly efficient in preventing backflow of external rainwater, is easily accepted by people, and is convenient for practical application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the composition of the utility model;

[0017] In the figure, (01) sump; (02) drainage pump; (03) flexible joint; (04) check valve; (05) gate valve; (06) backflow prevention pipe; (07) pressure drainage riser; (08) pressure drainage horizontal pipe; (09) outdoor rainwater inspection well; (10) flexible waterproof casing. DETAILED DESCRIPTION

[0018] The utility model provides a pressure drainage system to prevent external rainwater from flowing back. In order to make the purpose, technical solution and use effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings.

[0019] See also Figure 1The present example provides a pressure drainage system for preventing external rainwater from backflowing, which mainly comprises a sump (01), a drainage pump (02), a flexible joint (03), a check valve (04), a gate valve (05), an anti-backflow pipe (06), a pressure drainage riser (07), a pressure drainage transverse pipe (08), and an outdoor rainwater inspection well (09); wherein the drainage pump (02) is arranged in the sump (01), one end of the pressure drainage riser (07) is connected to the discharge port of the drainage pump (02), and the other end is connected to the pressure drainage transverse pipe (08), the flexible joint (03), the check valve (04), and the gate valve (05) are installed on the pressure drainage riser (07) in order from near to far from the drainage pump, the anti-backflow pipe (06) is connected to the pressure drainage transverse pipe (08) extending out of the outdoor part, and the pressure drainage transverse pipe (08) is finally connected to the outdoor rainwater inspection well (09).

[0020] See also Figure 1 In this example, the sump (01) should meet the requirement that the drainage pump (02) is opened no more than 6 times within one hour, and the sump is a reinforced concrete structure.

[0021] See also Figure 1 In this example, the drainage pump (02) is a common submersible pump, the pump casing is made of cast iron, and the blades are made of hard plastic.

[0022] See also Figure 1 In this example, the flexible joint (03), the check valve (04), the gate valve (05) have the same diameter as the pressure drainage riser (07) and the pressure drainage cross pipe (08), and the diameter is DN80; the flexible joint (03) is made of rubber, the check valve (04) is made of bronze, and the gate valve (05) is made of cast iron.

[0023] See also Figure 1 In this example, the backflow prevention pipe (06) has the same diameter and material as the pressure drainage riser (07) and the pressure drainage transverse pipe (08), with a diameter of DN80 and a material of stainless steel pipe.

[0024] See also Figure 1 In this example, the backflow prevention pipe (06) is an upward P-shaped bend and is buried in the covering soil together with the pressure drainage transverse pipe (08).

[0025] See also Figure 1 In this example, a flexible waterproof sleeve is provided at the wall-penetrating portion of the pressure drainage transverse pipe (08), and the rear portion of the anti-backflow pipe (06) slopes downward toward the outdoor rainwater inspection well (09).

[0026] See also Figure 1 In this example, the backflow prevention pipe (06) is essentially a part of the pressure drainage transverse pipe (08), and its service life is the same as that of the pressure drainage transverse pipe (08).

[0027] See also Figure 1 In this example, the diameter of the outdoor rainwater inspection well (06) is 1200 mm and it is a finished plastic inspection well.

[0028] It is understandable that practitioners in this field can make equivalent substitutions or changes based on the technical solution and concept of the utility model, and all these changes or substitutions should fall within the protection scope of the utility model.

Claims

1. A pressure drainage system for preventing external rainwater from flowing back, mainly comprising a sump (01), a drainage pump (02), a flexible joint (03), a check valve (04), a gate valve (05), an anti-backflow pipe (06), a pressure drainage riser (07), a pressure drainage transverse pipe (08), and an outdoor rainwater inspection well (09); characterized in that: The drainage pump (02) is arranged in the sump (01), one end of the pressure drainage riser (07) is connected to the discharge port of the drainage pump (02), and the other end is connected to the pressure drainage transverse pipe (08), the flexible joint (03), the check valve (04), and the gate valve (05) are installed on the pressure drainage riser (07) in the order from near to far from the drainage pump, the backflow prevention pipe (06) is connected to the pressure drainage transverse pipe (08) extending out of the outdoor part, and the pressure drainage transverse pipe (08) is finally connected to the outdoor rainwater inspection well (09).

2. A pressure drainage system for preventing external rainwater backflow as claimed in claim 1, characterized in that: The anti-backflow pipe (06) is an upward-turned P-shaped bend.

3. A pressure drainage system for preventing external rainwater backflow as claimed in claim 1, characterized in that: The anti-backflow pipe (06) is buried in the covering soil.

Images