A sewer end protection device

Abstract

The application relates to a drainage pipeline end protection device which comprises a U-shaped pipe, a liquid storage bin and a water pressure sensor; the U-shaped pipe has a water inlet end and a water outlet end, the water inlet end is provided with a vertical section pipe, and the water outlet end is provided with a horizontal section pipe; the liquid storage bin is internally filled with disinfectant liquid, is connected with the U-shaped pipe and can supply the disinfectant liquid into the U-shaped pipe; the water pressure sensor is arranged at the bottom of the U-shaped pipe and is used for monitoring the static water pressure in the U-shaped pipe and converting the static water pressure into water level data; wherein, a flexible water storage bag is further arranged on the vertical section pipe. The application realizes the safety protection of the drainage pipeline end.

Description

Technical Field

[0001] This application belongs to the field of floor drain technology, and specifically relates to a protective device for the end of a drainage pipe. Background Technology

[0002] In modern bathroom drainage systems, U-shaped floor drains rely on a water seal within the trap to prevent odors from the pipes from entering the room. However, if the drain is not used for an extended period, the water seal can evaporate naturally, eventually becoming insufficient to block gases. This allows bacteria and odors from the pipes to enter the room, posing a health risk. Currently, there are many types of floor drains on the market, including mechanical, single-water-seal, and double-water-seal models. However, due to differences in climate and indoor environmental conditions across the country, the rate of evaporation of the water seal varies, and the drying time of the water seal also differs. Ordinary water-seal floor drains often fail to guarantee a sufficient water seal depth. People often don't notice this until they smell odors from the pipes, at which point the polluted air has already entered the living space. Therefore, maintaining a constant water seal is crucial.

[0003] Because the pressure in the drain riser changes with the drainage conditions in the pipeline, when positive pressure forms in the drain pipe, it forces the water in the water seal above the drain inlet, causing sewage to overflow onto the bathroom floor. This drastic fluctuation in water level causes the water level in the drain to drop, potentially connecting the drain riser to the indoor space. Harmful gases and microbial pathogens can then enter the living space through the drain, damaging the indoor environment and affecting human health. Utility Model Content

[0004] In view of the above analysis, the present invention aims to provide a drainage pipe end protection device to solve one or more of the above-mentioned problems existing in the prior art.

[0005] The purpose of this utility model is achieved as follows:

[0006] A drainage pipe end protection device includes a U-shaped pipe, a liquid storage tank, and a water pressure sensor; the U-shaped pipe has an inlet end and an outlet end, the inlet end has a vertical section of pipe, and the outlet end has a horizontal section of pipe; the liquid storage tank is filled with disinfectant and is connected to the U-shaped pipe, enabling the supply of disinfectant into the U-shaped pipe; the water pressure sensor is located at the bottom of the U-shaped pipe and is used to monitor the hydrostatic pressure in the U-shaped pipe and convert it into water level data;

[0007] The vertical section of the pipe is also equipped with a flexible water storage bladder.

[0008] Furthermore, a water flow sensor is installed on the inner wall of the vertical section pipe, and the flexible water storage bladder has an open state and a closed state;

[0009] When the water flow sensor detects that sewage is flowing into the U-shaped pipe, the flexible water storage bladder is in the open state, keeping the vertical section of the pipe connected and not obstructing the drain from receiving the sewage outflow;

[0010] When the water flow sensor detects that no sewage is flowing into the U-shaped pipe, the flexible water storage bladder is closed, disconnecting the vertical section of the pipe to limit sewage fluctuations and prevent sewage backflow.

[0011] Furthermore, the flexible water storage bladder is located above the connection between the liquid storage tank and the vertical section pipe, and the water flow sensor is located at the top end of the vertical section pipe.

[0012] Furthermore, the flexible water storage bladder has a hollow ring structure and is made of silicone.

[0013] Furthermore, the flexible water storage bladder is equipped with a retractable support rod inside, which drives the flexible water storage bladder to switch between open and closed states.

[0014] Furthermore, the flexible water storage bladder has an inlet and an outlet pipe. The inlet is connected to the U-shaped pipe, and the flexible water storage bladder can accommodate sewage overflowing from the U-shaped pipe due to positive pressure fluctuations. The outlet pipe is located at the bottom of the flexible water storage bladder, and when the pressure fluctuation ends, sewage is replenished to the U-shaped water column in the U-shaped pipe through the outlet pipe.

[0015] Furthermore, a miniature electric butterfly valve is installed on the water outlet pipe.

[0016] Furthermore, the storage tank is equipped with a water inlet, and a water supply pipe is connected to the bottom of the storage tank. The disinfectant in the storage tank is then added into the U-shaped tube through the water supply pipe.

[0017] Furthermore, a solenoid valve is installed on the water supply pipe.

[0018] Furthermore, it also includes a control module, which is connected to a water pressure sensor and a solenoid valve. When the U-shaped water column in the U-tube does not meet the set depth, the water pressure sensor will send a signal to the control module to control the solenoid valve to open and replenish the disinfectant in the storage tank into the U-tube until the set depth is reached, after which the solenoid valve will close.

[0019] Compared with the prior art, the drainage pipe end protection device provided by this utility model, compared with the traditional floor drain which relies on a single water seal structure, is at risk of protection failure due to water evaporation and has a weak resistance to positive and negative pressure fluctuations in the pipe, this application improves and optimizes the structure below the water inlet of the traditional floor drain, and endows the floor drain with the ability to maintain water seal depth and resist positive pressure fluctuations through mechanical structure, fundamentally improving the reliability of the traditional floor drain. Attached Figure Description

[0020] Figure 1This is a cross-sectional view of a drainage pipe end protection device according to the present invention;

[0021] Figure 2 This is a schematic diagram of water flow in a drainage pipe end protection device according to the present invention;

[0022] Figure 3 This is a schematic diagram of the flexible water storage bladder in its closed state according to this utility model;

[0023] Figure 4 This is a schematic diagram of the flexible water storage bladder in the open state of this utility model;

[0024] Figure 5 This is a schematic diagram of the flexible water storage bladder and vertical tube section in the closed state of this utility model.

[0025] Figure label:

[0026] 1. Bathroom floor; 2. Liquid reservoir inlet; 3. Control module; 4. Water flow sensor; 5. Floor drain cover; 6. U-shaped pipe; 7. Liquid reservoir; 8. Telescopic support rod; 9. Flexible water storage bladder; 10. Solenoid valve; 11. Drive motor; 12. Water supply pipe; 13. Data cable; 14. Water pressure sensor; 15. Miniature electric butterfly valve; 16. Water inlet; 17. Water outlet; 18. Vertical pipe section; 19. Horizontal pipe section. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be noted that, unless otherwise specified, the implementation methods and features in the implementation methods in this disclosure can be combined, separated, interchanged, and / or rearranged. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0029] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0030] Example 1

[0031] A specific embodiment of this utility model discloses a drainage pipe end protection device, such as... Figures 1 to 5 As shown, the system includes a U-shaped tube 6, a liquid storage tank 7, and a water pressure sensor 14. The U-shaped tube 6 is used to seal the drainage system. One end of the U-shaped tube 6 is fixedly installed on a floor drain. After water is injected into the U-shaped tube 6, a U-shaped water column will remain inside the U-shaped tube 6 to form a water seal. The U-shaped tube 6 has an inlet end and an outlet end. The inlet end has a vertical section 18, and the outlet end has a horizontal section 19, which is connected to the drain riser. The vertical section 18 is connected to the outside of the inlet end of the U-shaped tube 6. The liquid storage tank 7 contains disinfectant and is connected to the U-shaped tube 6, enabling the supply of disinfectant into the U-shaped tube 6. For example, it can be connected to the vertical section 18, enabling the supply of disinfectant into the vertical section 18. The water pressure sensor 14 is located at the bottom of the U-shaped tube 6 and is used to monitor the hydrostatic pressure in the U-shaped tube 6 and convert it into water level data. The vertical section pipe 18 is equipped with a flexible water storage bladder 9, which is located above the connection between the liquid storage tank 7 and the vertical section pipe 18.

[0032] In one optional embodiment, the drainage pipe end protection device also includes a control module 3, making the drainage pipe end protection device of this embodiment a P-type floor drain with intelligent monitoring and automatic water replenishment functions. The control module 3 is connected to various sensors, solenoid valves, drive motors and other electronic control components. For example, the water pressure sensor 14 is connected to the control module 3 and can transmit water level data signals to the control module 3.

[0033] When positive pressure fluctuations or negative pressure suction in the drain riser cause a drop in the water level in the floor drain, or when natural evaporation causes a drop in the water seal level in the floor drain, the water pressure sensor 14 located at the bottom of the U-shaped pipe 6 detects the abnormality. The control module 3 then opens the solenoid valve 10, replenishing disinfectant into the U-shaped water column in the U-shaped pipe 6 through the water supply pipe 12. Specifically, when the U-shaped water column in the U-shaped pipe 6 meets the set depth (the set depth is the national standard requirement, i.e., a water seal depth of 50mm), the water pressure sensor 14 will not transmit a signal to the control module 3. When the U-shaped water column in the U-shaped pipe 6 does not meet the national standard requirement, the water pressure sensor 14 will transmit a signal to the control module 3, controlling the solenoid valve 10 to open and replenish the disinfectant in the storage tank 7 into the U-shaped pipe 6. During the water replenishment process, the water pressure sensor monitors the pipe pressure changes in real time until the national standard requirement is met, at which point the solenoid valve 10 closes.

[0034] In one alternative embodiment, the disinfectant in the storage tank 7 is a disinfectant containing a compound formulation of 0.5% hydrogen peroxide and quaternary ammonium salt.

[0035] In this embodiment, a water flow sensor 4 is also provided on the vertical section pipe 18. The water flow sensor 4 is located on the inner wall of the water inlet end of the U-shaped pipe 6 and at the top port of the vertical section pipe 18. When the water flow sensor 4 detects sewage flowing into the U-shaped pipe 6, it sends a corresponding signal to the control module 3. The control module 3 then controls the retractable support rod 8 to retract, simultaneously causing the flexible water storage bag 9 to fold and retract, thus adjusting the flexible water storage bag 9 to the open state; for example... Figure 4 As shown, the flexible water storage bladder 9 in the open state allows the vertical section pipe 18 to remain connected. At this time, the vertical section pipe 18 is the same as that of a conventional floor drain, and it does not obstruct the outflow of sewage. When the water flow sensor 4 detects that no sewage flows into the inlet of the U-shaped pipe 6, it will not send a corresponding signal to the control module 3. In this state, the retractable support rod 8 remains extended, and the flexible water storage bladder 9 will close at the axial position of the vertical section pipe 18, thus remaining in a closed state. Figure 3 As shown, the closed flexible water storage bladder 9 can disconnect the vertical section pipe 18, limit sewage fluctuations, and prevent sewage backflow.

[0036] In one alternative embodiment, the flexible water storage bladder 9 is a hollow ring structure made of silicone. The flexible water storage bladder 9 is rigidly supported and powered by a retractable support rod 8, which drives the flexible water storage bladder 9 to fold or extend. The retractable support rod 8 is located inside the flexible water storage bladder 9. When the support rods on both sides of the pipe wall are fully extended, the flexible water storage bladder 9, driven by the support rods, closes tightly in the middle of the pipe, preventing sewage backflow and delaying the natural evaporation of the water seal. When the retractable support rod 8 is fully retracted, the flexible water storage bladder is hidden within the pipe wall, creating favorable conditions for drainage from the floor drain.

[0037] Furthermore, the flexible water storage bladder 9 has an inlet hole 16 and an outlet pipe 17. The inlet hole 16 is connected to the U-shaped pipe 6. The flexible water storage bladder 9 can accommodate sewage overflowing from the U-shaped pipe 6 due to positive pressure fluctuations. The outlet pipe 17 is located at the bottom of the flexible water storage bladder 9 and outside the vertical section pipe 18. When the pressure fluctuation ends, sewage is replenished to the U-shaped water column in the U-shaped pipe 6 through the outlet pipe 17, raising the water level of the U-shaped water column. Figure 3 As shown, in the closed state, the top of the flexible water storage bladder 9 is the closed end, and an inverted V-shaped space is formed below the closed docking of the flexible water storage bladder 9. The water inlet 16 is set on the side wall of the inverted V-shaped space and is located in the upper middle position of the side wall of the inverted V-shaped space, so that the flexible water storage bladder 9 can hold a certain amount of sewage.

[0038] Furthermore, a miniature electric butterfly valve 15 is installed on the outlet pipe 17 located at the bottom of the flexible water storage bladder 9 to control the outflow of sewage from the flexible water storage bladder 9. The miniature electric butterfly valve 15 can be implemented using existing technology.

[0039] The flexible water storage bladder 9 serves two purposes: firstly, it seals the inlet pipe of the drain, delaying the natural evaporation of the water seal and preventing backflow of sewage from reaching the ground; secondly, it has an inlet hole 16 on its inner side, allowing backflowing sewage to enter the bladder and be temporarily stored. Once the pressure fluctuations inside the drain riser disappear, the miniature electric butterfly valve 15 at the bottom of the bladder opens, releasing the previously stored water into the drain to replenish its level. When all the sewage in the flexible water storage bladder 9 has been added to the water seal of the U-shaped tube 6, but the level still does not meet national standards, the water pressure sensor 14 sends a signal to the control module 3, controlling the solenoid valve 10 to open and replenish the disinfectant in the storage tank 7 into the U-shaped tube 6 until the national standards are met.

[0040] In one optional embodiment, a water pressure sensor 14 is provided inside the U-shaped tube. The water pressure sensor 14 is fixedly installed at the bottom inside the U-shaped tube 6. The water pressure sensor 14 is used to detect the pressure of the U-shaped water column. The water seal inside the U-shaped tube 6 is easily damaged. By measuring the pressure change inside the U-shaped tube 6, it can be determined whether the water seal inside the U-shaped tube 6 is damaged. When the detection result of the water pressure sensor 14 is lower than a preset threshold, it indicates that the water seal is damaged. Similarly, when the detection result of the water pressure sensor 14 is lower than a preset national standard threshold, it indicates that the water seal depth does not meet the standard.

[0041] In this embodiment, the working state of the floor drain is changed based on whether water flows through it, as detected by the water flow sensor 4. Specifically, when the water flow sensor 4 detects water flowing through it, the telescopic support rod 8 retracts, causing the flexible water storage bag 9 to retract and hide inside the pipe wall. In this state, the flexible water storage bag 9 is in the open state. In this case, the flexible water storage bag 9 forms the pipe wall of the floor drain pipe, keeping the floor drain pipe connected and facilitating drainage.

[0042] To prevent sewage backflow, such as Figure 3 As shown, the flexible water storage bladder 9 and the water supply pipe 12 are connected through the water outlet pipe 17. The water outlet pipe 17 is equipped with a miniature electric butterfly valve 15, which controls the replenishment of sewage.

[0043] In one optional embodiment, the control module 3 receives and transmits the corresponding monitoring data obtained from the water flow sensor 4 / water pressure sensor 14, determines whether the pressure and height of the U-shaped water column in the U-tube meet the corresponding requirements, and then controls the start and stop of the drive motor 11 to control the opening and closing of the flexible water storage bladder 9. It also controls the opening and closing of the solenoid valve 10 and the miniature electric butterfly valve 15 to execute the start and stop time of disinfectant replenishment. Optionally, the control module 3 receives and transmits signals through the data line 13, and simultaneously supplies power to each sensor, the miniature electric butterfly valve 15, and the drive motor 11. Specifically, the control module 3 processes the data collected by the water flow sensor 4 and the water pressure sensor 14 to control the opening and closing of the solenoid valve 10 and the extension and retraction of the telescopic support rod 8. Its control logic is as follows: When the water flow sensor 4 detects water flow, it transmits a signal to the control module 3. The control module 3 controls the telescopic rod to retract, thus retracting the flexible water storage bag 9 and opening the drainage channel. A monitoring threshold is set for the water pressure sensor. The threshold represents the pressure exerted on the bottom of the pipe when the water seal depth is 50mm. When the water pressure sensor 14 detects that the water level fluctuation in the drain has stopped, and the water pressure does not meet the threshold, the control module controls the solenoid valves located at the bottom of the flexible water storage bag and on the water supply pipe to open simultaneously until the pressure reaches the corresponding threshold.

[0044] The water flow sensor 4, solenoid valve 10, drive motor 11, water pressure sensor 14, and miniature electric butterfly valve 15 are all connected to the control module 3 via data cable 13. Data cable 13 transmits data monitored by the water flow sensor 4 and water pressure sensor 14, and provides power to the two sensors. It also processes the data received by the water flow sensor 4 and water pressure sensor 14, and uses this data to control the solenoid valve 10, drive motor 11, and miniature electric butterfly valve 15, determining their operating states. For example, the control module 3 receives and transmits the corresponding monitoring data from the water flow sensor 4 / water pressure sensor 14, determines whether the pressure and height of the U-shaped water column in the U-tube meet the corresponding requirements, and then controls the start and stop of the drive motor 11 to control the opening and closing of the flexible water storage bladder 9. It also controls the opening and closing of the solenoid valve 10 and miniature electric butterfly valve 15 to execute the start and stop times for disinfectant replenishment.

[0045] In this embodiment, the liquid storage tank 7 is used to store a certain volume of disinfectant. When full, it can meet the requirement of replenishing the water seal height of the floor drain from 0mm to 50mm twice. At the same time, the liquid storage tank 7 has an opening at the top for residents to pour disinfectant into it.

[0046] In this embodiment, the drainage pipe end protection device also includes a floor drain cover 5. The floor drain cover 5 is used to intercept impurities in the water above the bathroom floor 1 above the pipe to prevent blockage. The floor drain cover 5 is fixedly installed on the floor drain, and a water inlet is provided on the floor drain cover 5. The water above the bathroom floor 1 flows into the floor drain through the water inlet.

[0047] Furthermore, the storage tank 7 is equipped with a water inlet 2, which is located below the drain cover 5. When the disinfectant in the storage tank is insufficient, the drain cover 5 can be opened to add water to the storage tank through the water inlet 2. The bottom of the storage tank 7 is connected to a water supply pipe 12, which is connected to a U-shaped pipe 6. The disinfectant in the storage tank 7 can be added to the U-shaped pipe 6 through the water supply pipe 12. A solenoid valve 10 is installed on the water supply pipe 12 to control the addition of disinfectant.

[0048] The operating principle of the drainage pipe end protection device provided in this embodiment is as follows:

[0049] When the water flow sensor 4 detects water flow, it controls the flexible water storage bladder 9 to open, keeping the vertical pipe section 18 connected. At this time, the drainage pipe end protection device provided in this embodiment is a conventional floor drain and will not obstruct the discharge of sewage. When the water flow sensor 4 detects no water flow, it indicates that the floor drain is not in operation. It controls the flexible water storage bladder 9 inside the floor drain to extend and close. The closed flexible water storage bladder 9 disconnects the vertical pipe section 18, delaying the natural evaporation of the water seal inside the floor drain and preventing the positive pressure backflow of sewage from reaching the ground.

[0050] When positive pressure fluctuations occur in the drain riser, they will push the sewage in the floor drain to rise. There is an inlet hole 16 on the inside of the flexible water storage bladder 9. The overflowing sewage will enter the interior of the flexible water storage bladder 9 through this inlet and be temporarily stored. After the pressure fluctuations inside the drain riser disappear, the miniature electric butterfly valve 15 at the bottom of the flexible water storage bladder 9 will open to release the previously stored sewage into the floor drain to replenish the floor drain level.

[0051] When the water level in the floor drain drops due to positive pressure fluctuations, negative pressure suction, or natural evaporation in the drainage riser, the water pressure sensor 4 at the bottom of the floor drain detects the abnormality. The control module 3 opens the corresponding solenoid valve, and disinfectant flows out from the storage tank 7 to replenish the water seal. After reaching the appropriate height, the water pressure sensor sends a signal to the control module 3 again, causing the solenoid valve 10 to close. The disinfectant can kill 99.6% of common sewage bacteria, decompose 92% of malodorous gas molecules such as hydrogen sulfide, and inhibit the formation of biofilm in the pipes, thus ensuring the hygiene and safety of the residence.

[0052] Scenario 1:

[0053] When residents use sanitary ware, wastewater enters the main water seal bend through the filter screen of the drain cover 5. The filter screen intercepts large particles such as hair and paper scraps to prevent blockage. When the water flow sensor 4 detects water flow, the flexible water storage bladder 9 inside the drain contracts. At this time, the drainage pipe end protection device provided in this embodiment is a conventional drainage drain and will not obstruct the discharge of wastewater. Wastewater flows along the U-PVC bend under gravity, forming a stable water seal layer, using a static water column to prevent harmful gases such as hydrogen sulfide and ammonia from overflowing from the sewer.

[0054] Scenario 2:

[0055] When no resident is using the shower, the water flow sensor 4 will not detect the flow of sewage. At this time, the support rod fully extends, causing the flexible water storage tank 9 to extend and make tight contact in the middle of the pipe, forming a silicone barrier to prevent sewage from rushing back into the drain; it also slows down the natural evaporation rate of the water seal. In this state, the system prioritizes the integrity of the seal. Even if the disinfectant in the water storage tank 7 is depleted, the main water seal can still maintain basic odor prevention function until the user intervenes.

[0056] Scenario 3:

[0057] This situation represents an extreme case of severe pressure fluctuations within the pipes caused by external factors. When the drainage riser experiences severe pressure fluctuations (from -400Ua to +400Ua) due to external factors (such as simultaneous drainage from multiple floors or pump start-up and shutdown), it can cause positive pressure fluctuations or negative pressure suction within the water seal, as well as a drop in the water level of the floor drain due to natural evaporation. The water pressure sensor 14, located at the bottom of the floor drain, detects this anomaly. The control module 3 opens the corresponding solenoid valve 10, allowing disinfectant to flow from the storage tank 7 to replenish the water seal to the appropriate height. After this, the water pressure sensor 14 sends a signal to the control module 3 again, causing the solenoid valve 10 to close. The disinfectant can kill 99.6% of common sewer bacteria, decompose 92% of malodorous gas molecules such as hydrogen sulfide, and inhibit the formation of biofilm within the pipes, thus ensuring the hygiene and safety of the residence.

[0058] Compared with the prior art, the drainage pipe end protection device provided in this embodiment can achieve the following beneficial effects:

[0059] 1. Compared with traditional floor drains that rely on a single water seal structure and are at risk of protection failure due to water evaporation, this application retains the basic water seal of the inverted U-shaped P-bend and endows the floor drain with the ability to maintain the water seal depth and resist positive pressure fluctuations through mechanical structure, which fundamentally improves the reliability of traditional floor drains.

[0060] 2. When the floor drain is not in use (no water flow), the flexible water storage tank seals the drain's inlet pipe, slowing down the natural evaporation of the water seal within the drain. It also prevents sewage backflow caused by positive pressure fluctuations in the drainage riser. Relevant Chinese standards stipulate that the water seal height of a floor drain should be above 50mm. A liquid level sensor is installed at the bottom of the U-bend. When the water seal height falls below 50mm, the water storage tank automatically releases a disinfectant solution containing a compound formula of 0.5% hydrogen peroxide and quaternary ammonium salt to replenish the drain. While maintaining the water seal height within the drain, it also kills microbial pathogens in the pipes, significantly extending the continuous protection time under extreme environments from 7-15 days for traditional floor drains to 45 days. This dynamic protection not only solves the problem of easy failure of a single water seal, but also achieves a hygiene upgrade through active sterilization technology. The disinfectant can kill 99.6% of common sewage bacteria, decompose 92% of malodorous gas molecules such as hydrogen sulfide, and inhibit the formation of biofilm in the pipe. It transforms the traditional passive isolation mode of floor drains into an active defense system of continuous purification, eliminating the risk of backflow of odors and the spread of pathogens from the source.

[0061] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above description is only a specific embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A sewer end guard, characterized in that The device includes a U-shaped tube, a liquid storage tank, and a water pressure sensor. The U-shaped tube has an inlet end and an outlet end, with the inlet end having a vertical section and the outlet end having a horizontal section. The liquid storage tank contains disinfectant and is connected to the U-shaped tube, allowing the disinfectant to be supplied into the U-shaped tube. The water pressure sensor is located at the bottom of the U-shaped tube and is used to monitor the hydrostatic pressure in the U-shaped tube and convert it into water level data. The vertical section of the pipe is also equipped with a flexible water storage bladder.

2. A drain line end guard as defined in claim 1, wherein, A water flow sensor is also provided on the inner wall of the vertical section pipe, and the flexible water storage bag has an open state and a closed state; When the water flow sensor detects that sewage is flowing into the U-shaped pipe, the flexible water storage bladder is in the open state, keeping the vertical section of the pipe connected and not obstructing the drain from receiving the sewage outflow; When the water flow sensor detects that no sewage is flowing into the U-shaped pipe, the flexible water storage bladder is closed, which disconnects the vertical section of the pipe to limit sewage fluctuations and prevent sewage backflow.

3. A drain line end guard as defined in claim 2, wherein, The flexible water storage bladder is located above the connection between the liquid storage tank and the vertical section pipe, and the water flow sensor is located at the top port of the vertical section pipe.

4. The drain line end safeguard of claim 1, wherein, The flexible water storage bladder has a hollow ring structure and is made of silicone.

5. A drain line end guard as defined in claim 4, wherein, The flexible water storage bladder is equipped with a retractable support rod inside, and the switching between the open and closed states of the flexible water storage bladder is driven by the retractable support rod.

6. A drain line end guard as defined in claim 4, wherein, The flexible water storage bladder has an inlet and an outlet pipe. The inlet is connected to the U-shaped pipe. The flexible water storage bladder can contain sewage overflowing from the U-shaped pipe due to positive pressure fluctuations. The outlet pipe is located at the bottom of the flexible water storage bladder. When the pressure fluctuation ends, sewage is replenished to the U-shaped water column in the U-shaped pipe through the outlet pipe.

7. A drain line end guard as defined in claim 6, wherein, A miniature electric butterfly valve is installed on the water outlet pipe.

8. A drain line end guard as defined in claim 4, wherein, The liquid storage tank is equipped with a water inlet, and a water supply pipe is connected to the bottom of the liquid storage tank. The disinfectant in the liquid storage tank is added into the U-shaped tube through the water supply pipe.

9. A drain line end guard as defined in claim 8, wherein, The water supply pipe is equipped with a solenoid valve.

10. A drain line end guard as defined in claim 9, wherein, It also includes a control module, which is connected to the water pressure sensor and solenoid valve; When the U-shaped water column in the U-tube does not reach the set depth, the water pressure sensor will send a signal to the control module to control the solenoid valve to open, replenishing the disinfectant in the storage tank into the U-tube until the set depth is reached, after which the solenoid valve will close.

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