A double-gate valve-based backflow prevention and clogging prevention device for drainage

Abstract

The application relates to a double-gate-valve-based drainage anti-backflow and anti-blocking device. The double-gate-valve-based drainage anti-backflow and anti-blocking device comprises the following: a secondary pipeline is installed on a primary pipeline through a flange plate, a primary gate valve is installed on the secondary pipeline, a drain pipe is arranged on the secondary pipeline between the flange plate and the primary gate valve, the drain pipe is vertically downward, and a secondary gate valve is arranged on the drain pipe; the other end of the secondary pipeline is connected with a water pump through a hose, and the water pump is installed in a water collecting pit. The scheme provided by the application can physically isolate a backflow path through the primary gate valve arranged on the secondary pipeline, can reduce the leakage risk compared with a traditional check valve, can effectively reduce the damage of the water pump caused by the backflow of water flow in the pipeline, can drive a backwashing pipeline by using gravitational potential energy through the arrangement of the drain pipe and the secondary gate valve, can prevent the deposition of silt, can realize the anti-backflow and anti-blocking functions through the time sequence action of the double gate valves, and can empty the water flow in the main pipeline, and can reduce the starting load and starting current of the water pump.

Description

Technical Field

[0001] This application relates to the field of drainage backflow prevention technology, and in particular to a drainage backflow prevention and anti-blocking device based on a double gate valve. Background Technology

[0002] When the water pump stops running, backflow of water in the pipeline can easily impact the impeller, causing damage to the water pump. The traditional solution is to install a one-way check valve, but backflow will still occur after the seal fails.

[0003] In drainage scenarios with high sand or sludge content, sludge easily accumulates and clogs the pipes after the pump stops, requiring frequent manual cleaning or the addition of backwashing devices, which is costly and inefficient. Existing backflow preventers (such as double check valve structures) can prevent backflow, but because the pipes are filled with water, the pump needs to overcome a large amount of gravitational potential energy when starting up. The greater the drainage height difference, the greater the gravitational potential energy of the water, and it lacks active anti-clogging function.

[0004] Therefore, it is necessary to design a water pump system suitable for scenarios with large elevation differences and sewage drainage, and an integrated drainage device that achieves backflow prevention and pipe blockage prevention through the coordinated action of dual gate valves. Utility Model Content

[0005] To address or partially address the problems existing in related technologies, this application provides a drainage anti-backflow and anti-blocking device based on a double gate valve, which aims to solve the problems of backflow and silt deposition blockage in drainage pipes.

[0006] This application provides a drainage anti-backflow and anti-clogging device based on a double gate valve, comprising:

[0007] Main pipes, flanges, secondary pipes, main gate valves, drain pipes, secondary gate valves, hoses, water pumps, and sump pits;

[0008] The secondary pipeline is installed on the main pipeline via a flange, the main gate valve is installed on the secondary pipeline, and the drain pipe is set on the secondary pipeline between the flange and the main gate valve. The drain pipe is vertically downward and is equipped with a secondary gate valve.

[0009] The other end of the secondary pipe is connected to the water pump via a hose, and the water pump is installed in the sump.

[0010] Optionally, in some embodiments, the main gate valve is an electric ball valve, the auxiliary gate valve is an electric butterfly valve, and the main gate valve, auxiliary gate valve, and water pump are connected to the same controller.

[0011] Optionally, in some embodiments, the main pipe, secondary pipe, and drain pipe are made of seamless steel pipe, and the hose is made of steel wire reinforced rubber hose.

[0012] The technical solution provided in this application may include the following beneficial effects:

[0013] By physically isolating the backflow path with a main gate valve on the secondary pipeline, the risk of leakage is reduced compared to traditional check valves, effectively reducing the risk of water pump damage caused by backflow of water in the pipeline. By setting up a backwash pipeline composed of a drain pipe and a secondary gate valve, the backwash pipeline is driven by gravity potential energy to prevent sediment deposition. The sequential action of the double gate valves achieves the functions of preventing backflow and preventing blockage, and can also drain the water flow in the main pipeline, reducing the water pump starting load and starting current.

[0014] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0015] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0016] Figure 1 This is a schematic diagram of the structure of a drainage anti-backflow and anti-clogging device based on a double gate valve, as shown in the embodiments of this application;

[0017] Figure 2 This is a schematic diagram of a drainage anti-backflow and anti-clogging device based on a double gate valve, as shown in an embodiment of this application.

[0018] Figure 3 This is a backwashing schematic diagram of a drainage anti-backflow and anti-clogging device based on a double gate valve, as shown in an embodiment of this application.

[0019] Attached reference numerals: 1-Main pipe, 2-Flange, 3-Secondary pipe, 4-Main gate valve, 5-Drain pipe, 6-Secondary gate valve, 7-Hose, 8-Water pump, 9-Sump. Detailed Implementation

[0020] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0021] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0022] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] When a water pump stops running, backflow of water in the pipeline can easily impact the impeller, causing pump damage. The traditional solution is to install a one-way check valve, but backflow can still occur if the seal fails. In drainage scenarios with high sand or sludge content, sludge easily accumulates and clogs the pipeline after the pump stops, requiring frequent manual cleaning or the addition of backflushing devices, which is costly and inefficient. While existing backflow preventers (such as double check valve structures) can prevent backflow, because the pipeline is filled with water, the pump needs to overcome a significant amount of gravitational potential energy when starting up. The greater the drainage height difference, the greater the gravitational potential energy of the water, and there is a lack of active anti-clogging functionality.

[0025] To address the aforementioned issues, this application provides a drainage anti-backflow and anti-clogging device based on dual gate valves. This device physically isolates the backflow path by installing a main gate valve on the secondary pipeline, reducing leakage risk compared to traditional check valves and effectively minimizing pump damage caused by backflow in the pipeline. By setting up a drain pipe and a secondary gate valve to form a backwashing pipeline, the device utilizes gravitational potential energy to drive the backwashing pipeline, preventing sediment deposition. The sequential action of the dual gate valves achieves anti-backflow and anti-clogging functions, and can also drain water from the main pipeline, reducing the pump's starting load and starting current.

[0026] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the structure of a drainage anti-backflow and anti-blocking device based on a double gate valve, as shown in an embodiment of this application.

[0028] See Figure 1 A drainage anti-backflow and anti-clogging device based on a double gate valve includes:

[0029] 1. Main pipe; 2. Flange; 3. Secondary pipe; 4. Main gate valve; 5. Drain pipe; 6. Secondary gate valve; 7. Hose; 8. Water pump; and 9. Sump.

[0030] Flange 2 is welded to both the main pipe 1 and the secondary pipe 3. The secondary pipe 3 is installed on the main pipe 1 via flange 2. The main gate valve 4 is installed on the secondary pipe 3 and is an electric ball valve. A drain pipe 5 is located on the secondary pipe 3 between flange 2 and the main gate valve 4. The drain pipe 5 is vertically downward and is equipped with a secondary gate valve 6, which is an electric butterfly valve. The other end of the secondary pipe 3 is connected to a water pump 8 via a flexible hose 7. The water pump 8 is installed in a sump 9. The main gate valve 4, the secondary gate valve 6, and the water pump 8 are connected to the same controller, which controls the opening and closing of these components.

[0031] Main pipe 1, secondary pipe 3, and drain pipe 5 are made of seamless steel pipes, and flexible hose 7 is made of steel wire reinforced rubber flexible hose. Main gate valve 4, secondary gate valve 6, and flange 2 are matched with the pipeline used.

[0032] Both the sump 9 and the water pump 8 can utilize existing equipment on site. The pipe diameters and wall thicknesses of the main pipe 1, secondary pipe 3, and hose 7 are selected based on the drainage height difference, drainage volume, and pump outlet diameter. When the water pump 8 is running, the main gate valve 4 is open, and the secondary gate valve 6 is closed, allowing water to flow in the forward direction. When the pump stops, the main gate valve 4 closes first to prevent backflow, and the secondary gate valve 6 opens after a 5-10 second delay. The height difference potential energy causes the residual water in the pipe to flow in the reverse direction through the secondary pipe 3, flowing out from the drain pipe 5 and flushing away silt and sand into the sump 9.

[0033] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A drainage anti-backflow and anti-clogging device based on a double gate valve, characterized in that, include: Main pipe (1), flange (2), secondary pipe (3), main gate valve (4), drain pipe (5), secondary gate valve (6), hose (7), water pump (8) and sump (9); The secondary pipe (3) is installed on the main pipe (1) through the flange (2), the main gate valve (4) is installed on the secondary pipe (3), the drain pipe (5) is set on the secondary pipe (3) between the flange (2) and the main gate valve (4), the drain pipe (5) is vertically downward, and the drain pipe (5) is equipped with a secondary gate valve (6). The other end of the secondary pipe (3) is connected to the water pump (8) via a hose (7), and the water pump (8) is installed in the sump (9).

2. The drainage anti-backflow and anti-clogging device based on a double gate valve according to claim 1, characterized in that: The main gate valve (4) is an electric ball valve, the auxiliary gate valve (6) is an electric butterfly valve, and the main gate valve (4), the auxiliary gate valve (6) and the water pump (8) are connected to the same controller.

3. The drainage anti-backflow and anti-clogging device based on a double gate valve according to claim 1, characterized in that: The main pipe (1), secondary pipe (3), and drain pipe (5) are made of seamless steel pipe, and the hose (7) is made of steel wire skeleton rubber hose.

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