Sewage backflow prevention device

Abstract

The utility model relates to a sewage backflow prevention device which comprises a sewage discharge pipeline buried underground, two ends of the sewage discharge pipeline are respectively connected with a water inlet pipeline and a water outlet pipeline, the water inlet pipeline is communicated with an in-plant sewage discharge port, and the water outlet pipeline is communicated with an outer net sewage pipe network. An anti-backflow device with a valve is installed between the sewage discharge pipeline and the water inlet pipeline, the anti-backflow device is used for analyzing the liquid level conditions of the in-plant sewage discharge outlet and the outer net sewage pipe network, the valve is correspondingly controlled to be opened or closed, and therefore the liquid level conditions of the in-plant sewage discharge outlet and the outer net sewage pipe network are adjusted. And the sewage is prevented from flowing back to a sewage discharge outlet in a plant due to too high liquid level from an outer sewage pipe network. The utility model has the advantages of simple and reasonable structure, practicability, convenience and the like.

Description

Technical Field

[0001] This utility model belongs to the field of oil-water separation technology and relates to a sewage backflow prevention device. Background Technology

[0002] Wastewater from the plant is collected and flows into the municipal sewage system. However, due to the low-lying terrain of some parts of the plant, backflow of wastewater often occurs when there is a large flow of wastewater from the external pipeline or during rainy weather, causing wastewater to overflow from the plant. This requires a large number of personnel for cleaning and maintenance, which is time-consuming, labor-intensive, and costly. Moreover, maintenance only cleans up the wastewater and does not fundamentally solve the problem of wastewater overflow.

[0003] Therefore, a sewage backflow prevention device was designed to overcome the above problems. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a sewage backflow prevention device that is simple and reasonable in structure, practical and convenient, low in cost and effective.

[0005] This utility model is achieved through the following technical solution: a sewage backflow prevention device, comprising a sewage pipe buried underground, with an inlet pipe and an outlet pipe connected to both ends of the sewage pipe, wherein the inlet pipe is connected to the sewage discharge outlet within the plant, and the outlet pipe is connected to the external sewage network. A backflow prevention device with a valve is installed between the sewage pipe and the inlet pipe. The backflow prevention device analyzes the liquid level of the sewage discharge outlet within the plant and the external sewage network, and controls the valve to open or close accordingly, thereby adjusting the liquid level of the sewage discharge outlet within the plant and the external sewage network, preventing sewage from flowing back into the sewage discharge outlet within the plant due to excessively high liquid level in the external sewage network.

[0006] Preferably, the anti-backflow device consists of a hollow casing and a connecting pipe, with the top of the casing higher than the maximum height of the inlet and outlet pipes. A vertical partition is installed in the middle of the casing, with through holes for electric valves. The vertical partition divides the casing into a first chamber and a second chamber. The side wall of the first chamber is connected to the inlet pipe, and the side wall of the second chamber is connected to the sewage discharge pipe. A first level sensor and a second level sensor are respectively installed on the side walls of the first and second chambers. A connecting pipe with a control mechanism is installed on the top outer wall of the casing, with both ends extending into and connecting the first and second chambers. The control mechanism is connected to the first and second level sensors and the electric valve circuit. The first and second level sensors send detection data to the control mechanism, which controls the opening or closing of the connecting pipe and the electric valve to regulate the liquid level at the plant's sewage discharge outlet and the external sewage network, preventing sewage backflow.

[0007] Preferably, the control mechanism consists of a motor, a water pump, and a PLC control system. The motor is connected to the water pump and the electric valve circuits, and the motor is controlled by the PLC control system.

[0008] Preferably, the electric valve is an electric butterfly valve.

[0009] Preferably, the sewage pipe is equipped with a flow meter, which is connected to the PLC control system to send the flow information to the PLC control system.

[0010] Preferably, the PLC control system is a PLC controller.

[0011] The beneficial effects of this utility model are as follows:

[0012] This utility model's anti-backflow device effectively solves the problem of sewage overflow caused by fluctuations in the external sewage pipe flow and rainy weather. It modifies the original connection point where the sewage from the plant flowed into the external sewage main pipe, allowing sewage to flow directly into the municipal sewage pipe under normal circumstances (the electric butterfly valve remains open under normal conditions, and the sewage discharge pipe, inlet pipe, and outlet pipe are in normal use). In special circumstances (the electric butterfly valve closes, isolating the sewage in the inlet and outlet pipes, and the water pump on the connecting pipe is turned on to pump the plant's sewage into the drainage pipe until the sewage level in the plant drops to a normal value), this method not only prevents sewage backflow, but also ensures that the plant's sewage can still be discharged into the external sewage pipe for treatment in a timely manner even when the external sewage pipe has a high liquid level for a long time. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the internal structure of the anti-backflow device in this utility model. Detailed Implementation

[0015] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0017] The present invention will now be described in detail with reference to the accompanying drawings: Figure 1-2 As shown, a sewage backflow prevention device includes a sewage pipe 1 buried underground. The two ends of the sewage pipe 1 are connected to an inlet pipe 2 and an outlet pipe 3, respectively. The inlet pipe 2 is connected to the sewage discharge outlet 4 inside the plant, and the outlet pipe 3 is connected to the external sewage network 14. An anti-backflow device with a valve is installed between the sewage pipe 1 and the inlet pipe 2. The anti-backflow device analyzes the liquid level of the sewage discharge outlet 4 inside the plant and the sewage network 14 outside the plant, and controls the valve to open or close accordingly, thereby adjusting the liquid level of the sewage discharge outlet inside the plant and the sewage network 14 outside the plant, and preventing sewage from flowing back into the sewage discharge outlet inside the plant from the sewage network outside the plant due to excessive liquid level.

[0018] The anti-backflow device consists of a hollow housing 5 and a connecting pipe 6. The top of the housing 5 is higher than the maximum height of the inlet and outlet pipes. A vertical partition 7 is located in the middle of the housing 5, with through holes installed at the through holes. The vertical partition 7 divides the interior of the housing into a first chamber 9 and a second chamber 10. The side wall of the first chamber 9 is connected to the inlet pipe 2, and the side wall of the second chamber 10 is connected to the drain pipe 1. A first liquid level sensor 11 and a second liquid level sensor are respectively installed on the side walls of the first chamber 9 and the second chamber 10. 12. A connecting pipe 6 with a control mechanism is installed on the top outer wall of the casing 5. The two ends of the connecting pipe 6 extend into the first chamber 9 and the second chamber 10 respectively and are connected to the first chamber 9 and the second chamber 10. The control mechanism is connected to the first liquid level sensor 11, the second liquid level sensor 12 and the electric valve 8. The first liquid level sensor 11 and the second liquid level sensor 12 send the detection data to the control mechanism. The control mechanism controls the opening or closing of the connecting pipe 6 and the electric valve 8 to regulate the liquid level of the sewage discharge port 4 in the plant and the external sewage pipe network 14 to prevent sewage backflow.

[0019] The control mechanism consists of a motor 15, a water pump 16, and a PLC control system (not shown in the figure). The motor 15 is connected to the water pump 16 and the electric valve 8 via circuits, and the motor 15 is controlled by the PLC control system. The electric valve 8 is an electric butterfly valve.

[0020] A flow meter 13 is installed on the sewage pipe 1. The flow meter 13 is connected to the PLC control system and is used to send the flow information to the PLC control system. The PLC control system is a PLC controller.

[0021] The flow and pressure of the external sewage network are frequently unstable due to various reasons, leading to rising liquid levels. This results in the main sewage pipe level being higher than the sewage outlet level within the plant, causing sewage backflow and overflow within the plant area, impacting both the environment and production.

[0022] The working principle and features of this utility model are as follows:

[0023] First liquid level sensor and second liquid level sensor:

[0024] It is mainly used to detect the liquid level in the first and second chambers, so that the liquid level of the sewage discharge outlet in the plant and the sewage pipe network can be directly analyzed. The liquid level sensors are all set with maximum and minimum values ​​(conventional technology, so no further explanation is needed).

[0025] The sewage pipes, inlet pipes, and outlet pipes are in normal use. When the external sewage network level is detected to be high, the electric butterfly valve closes and remains closed for a period of time. Later, due to sewage accumulation within the plant, the internal sewage level will also be high. At this point, the PLC will activate.

[0026] When the external sewage level is low, the second level sensor detects that the external sewage network is at its lowest value, and the electric butterfly valve is in the normally open state, allowing the sewage inside the plant (internal network) and the external network to flow directly into the external sewage network.

[0027] When the external sewage level rises due to high flow rate or other reasons, the external sewage level tank level increases, the second level sensor outputs an increased signal, and when it exceeds the set value, the electric butterfly valve closes, separating the internal and external sewage.

[0028] At this time, because the sewage in the plant (internal network) cannot be discharged, the water level in the plant (internal network) continues to rise. The output signal of the first liquid level tank sensor increases. When it exceeds the set value, the PLC controls the water pump to start, so that the sewage in the plant (internal network) is pumped into the external sewage network. After the water pump runs for a period of time, the sewage level in the plant (internal network) drops, the sensor output signal decreases, and when it exceeds the set value, the water pump stops. This cycle repeats automatically, ensuring that sewage will not backflow when the liquid level in the external network is high, and that the sewage in the plant (internal network) can still be discharged when the liquid level in the external network is high. The whole process is efficient and simple. This utility model can effectively reduce the environmental pollution caused by sewage backflow and reduce the workload of personnel.

[0029] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A sewage backflow prevention device, comprising a sewage pipe (1) buried underground, wherein an inlet pipe (2) and an outlet pipe (3) are respectively connected to both ends of the sewage pipe (1), wherein the inlet pipe (2) is connected to the sewage discharge outlet (4) of the plant, and the outlet pipe (3) is connected to the external sewage network (14), characterized in that: A backflow prevention device with a valve is installed between the sewage discharge pipe (1) and the water inlet pipe (2). The backflow prevention device analyzes the liquid level of the sewage discharge outlet (4) and the external sewage network (14) in the plant and controls the valve to open or close accordingly, thereby adjusting the liquid level of the sewage discharge outlet and the external sewage network (14) in the plant and preventing sewage from flowing back into the sewage discharge outlet from the external sewage network due to excessive liquid level.

2. The sewage backflow prevention device according to claim 1, characterized in that: The anti-backflow device consists of a hollow housing (5) and a connecting pipe (6). The top of the housing (5) is higher than the maximum height of the inlet and outlet pipes. A vertical partition (7) is provided in the middle of the housing (5). A through hole is provided on the vertical partition (7), and an electric valve (8) is installed at the through hole. The vertical partition (7) divides the interior of the housing into a first chamber (9) and a second chamber (10). The side wall of the first chamber (9) is connected to the inlet pipe (2), and the side wall of the second chamber (10) is connected to the drain pipe (1). A first liquid level sensor (11) and a second liquid level sensor are respectively provided on the side walls of the first chamber (9) and the second chamber (10). (12) A connecting pipe (6) with a control mechanism is installed on the top outer wall of the casing (5). The two ends of the connecting pipe (6) extend into the first chamber (9) and the second chamber (10) respectively and are connected to the first chamber (9) and the second chamber (10). The control mechanism is connected to the first liquid level sensor (11), the second liquid level sensor (12) and the electric valve (8). The first liquid level sensor (11) and the second liquid level sensor (12) send the detection data to the control mechanism. The control mechanism controls the opening or closing of the connecting pipe (6) and the electric valve (8) to adjust the liquid level of the sewage discharge outlet (4) in the plant and the sewage network (14) in the external network to prevent sewage backflow.

3. The sewage backflow prevention device according to claim 2, characterized in that: The control mechanism consists of a motor (15), a water pump (16) and a PLC control system. The motor (15) is connected to the water pump (16) and the electric valve (8) respectively, and the motor (15) is controlled by the PLC control system.

4. The sewage backflow prevention device according to claim 3, characterized in that: The electric valve (8) is an electric butterfly valve.

5. The sewage backflow prevention device according to claim 1 or 4, characterized in that: A flow meter (13) is installed on the sewage pipe (1). The flow meter (13) is connected to the PLC control system and is used to send the flow information to the PLC control system.

6. The sewage backflow prevention device according to claim 5, characterized in that: The PLC control system is a PLC controller.

Images