Backflow early warning system for rubber clack check valve

Abstract

The utility model discloses a rubber clack check valve backflow early warning system which comprises a check valve and an early warning mechanism, two ends of the check valve are opened, the check valve is used for being communicated with two sections of pipelines, the check valve comprises a valve body, a rubber clack and a valve cover, and the side wall of the valve body is provided with an installation opening and the valve cover matched with the installation opening for sealing. A rubber clack which freely swings and is used for stopping fluid from flowing back is arranged on the side, located in the valve body, of the valve cover, an inclined face attached to the free end of the rubber clack is arranged on the side, opposite to the free end of the rubber clack, of the inner wall of the valve body, and the rubber clack and the inner wall of the valve body form a Z-shaped structure in the preset fluid direction through the inclined face. The early warning mechanism comprises an early warning detection module arranged on the outer wall of the valve body, an embedded magnet arranged at the free end of the rubber clack and a magnetic induction sensor embedded in the inclined face. The system provided by the utility model can solve the problem that backflow pollution of a check valve of a water supply network is difficult to find and block in time at the present stage.

Description

Technical Field

[0001] This utility model belongs to the technical field of backflow prevention detection of check valves in urban water supply systems, specifically relating to a backflow early warning system for rubber flap check valves. Background Technology

[0002] Urban water supply networks are an indispensable infrastructure of modern cities, often referred to as the city's "vascular system," and their health is crucial to the city's ecological civilization and sustainable development. Butterfly check valves, automatic valves that prevent backflow of fluid media, are widely used in urban water supply systems. Backflow contamination caused by their malfunction is one of the main causes of secondary water pollution in water supply networks. Check valves, operating in underground, enclosed, unstructured environments for extended periods, can experience problems such as valve disc jamming and sealing failure, leading to backflow and consequently causing fluid contamination, equipment damage, process interruptions, and energy waste. Currently, there is a lack of effective, low-cost, real-time early warning devices and monitoring methods for checking valve malfunctions and the presence of backflow contamination in water supply networks. Existing technologies primarily rely on passive monitoring of check valve malfunctions, depending mainly on regular manual inspections. This is inefficient, difficult to detect and report malfunctions in a timely manner, and results in significant time delays. It also fails to promptly stop backflow contamination and lacks proactive early warning and intelligent management mechanisms. Therefore, timely and accurate monitoring of the backflow contamination status of check valves is crucial for ensuring public health and safety.

[0003] Patent document CN220225579U discloses a novel water seal device for a combined riser before it connects to a local sewage network. The device includes a riser body, a water trap on the lower surface of the riser body, a check valve inside the water trap near the well body, a well body at the end of the water trap away from the riser body, a first inspection port on the lower side of the riser body, a second inspection port on the side of the check valve near the water trap, and a connecting shaft inside the check valve, which is rotatably connected to a rubber check plate.

[0004] Patent document CN221628926U discloses a double-sealed check valve, relating to the field of check valve technology. The valve includes a valve cylinder, inside which are arranged a first sealing assembly and a second sealing assembly. The first sealing assembly includes a mounting ring, a rubber ring on one side of the mounting ring, a sealing post on one side of the rubber ring, a movable post on one side of the sealing post, and a fixed cylinder on one side of the movable post. The outer wall of the fixed cylinder is provided with a mounting post, and the outer wall of the movable post is provided with a fixing block, which is fixedly sleeved on the outer wall of the movable post. Utility Model Content

[0005] The purpose of this invention is to provide a backflow early warning system for rubber flap check valves. This system can conveniently and quickly provide long-term real-time proactive sensing and early warning of the failure and backflow state of conventional rubber flap check valves, so as to solve the problem that backflow pollution of check valves in water supply networks is difficult to detect and block in a timely manner at present.

[0006] To achieve the purpose of this utility model, the following technical solution is provided: a rubber flap check valve backflow warning system, including a check valve with openings at both ends for connecting two sections of pipeline and a warning mechanism. The check valve includes a valve body, a rubber flap, and a valve cover. The side wall of the valve body is provided with an installation opening and a matching sealing valve cover. The valve cover is provided with a freely swinging rubber flap located on one side of the valve body for blocking fluid backflow. The inner wall of the valve body is provided with an inclined surface on the side opposite to the free end of the rubber flap, which fits against the free end of the rubber flap. The inclined surface makes the rubber flap form a Z-shaped structure with the inner wall of the valve body along a preset fluid direction.

[0007] The warning mechanism includes a warning detection module mounted on the outer wall of the valve body, an embedded magnet mounted on the free end of the rubber flap, and a magnetic induction sensor embedded in the inclined surface. The warning detection module uses the magnetic field strength value collected by the magnetic induction sensor to determine whether there is a backflow phenomenon.

[0008] This invention uses a magnetic induction sensor installed on the rubber flap of a check valve to detect changes in the distance between the valve flap and the inclined surface of the valve body. The sensor is then compared with a set threshold to determine whether backflow is present, thus ensuring the safe and stable operation of the fluid transport system.

[0009] Specifically, a supporting inclined surface is provided on the inner wall of the valve body near the valve cover, and the angle between the supporting inclined surface and the inner wall of the valve body relative to the preset fluid direction is 45 degrees.

[0010] Specifically, the angle between the inclined surface and the inner wall of the valve body relative to the preset fluid direction is 135 degrees.

[0011] Specifically, when the rubber flap is in contact with the inclined surface of the valve body, the magnetic pole surface of the embedded magnet and the sensing plane of the magnetic induction sensor are arranged in line with the center line, thereby ensuring more accurate data acquisition when closed.

[0012] Specifically, the sensing plane of the magnetic induction sensor is 3mm away from the magnetic pole plane of the magnet.

[0013] Specifically, the magnetic induction sensor adopts an externally threaded cylindrical structure, and the inclined surface of the valve body is vertically provided with an internally threaded hole that mates with the external thread of the externally threaded cylindrical structure.

[0014] Specifically, the early warning detection module includes a microcontroller, a wireless communication module, a power supply, a memory, and a warning light.

[0015] Specifically, the early warning detection module also includes a polyoxymethylene insulating and corrosion-resistant shell for sealing and preventing signal shielding.

[0016] Specifically, the embedded magnet includes a threaded seat that passes through the free end of the rubber flap, and a magnet that is threadedly engaged with the threaded seat and has external threads, so as to prevent the magnet from falling off during daily operation.

[0017] Specifically, the threaded seat is made of non-magnetic nylon, which ensures strength without affecting the original magnetic field of the magnet.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] Based on highly sensitive magnetic induction sensors and intelligent algorithms, the device can accurately monitor the real-time opening and closing status of the check valve disc. It can automatically compare and analyze the monitoring data with the set threshold to detect backflow abnormalities in real time and promptly send warning information to the background through audible and visual alarm signals. This enables rapid response to abnormalities, improves device safety, reduces potential losses, ensures long-term real-time control of the valve's working status, and effectively solves the problem of secondary pollution of water supply quality caused by backflow.

[0020] The early warning system integrates hardware such as processor, power supply, communication module and warning lights to form an independent and complete detection system. It does not rely on external basic energy facilities, which makes it easy to deploy quickly in complex underground environments and reduces the complexity of installation and maintenance.

[0021] With optimized power management and low-power hardware design, the system can operate stably for a long time, significantly reducing energy consumption, meeting the requirements of long-term operation of check valves, extending the service life of the system, reducing maintenance frequency, improving operation and maintenance efficiency, and making it suitable for all-weather unattended scenarios. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the backflow warning system for the rubber flap check valve provided in this embodiment;

[0023] Figure 2 This is a flowchart illustrating the backflow warning system of the rubber flap check valve provided in this embodiment.

[0024] In the diagram, 1 is the valve body; 2 is the embedded magnet; 3 is the magnetic induction sensor; 4 is the watertight cable; 5 is the early warning detection module; 6 is the supporting inclined surface; 7 is the rubber flap; 8 is the valve cover; and 9 is the inclined surface. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] like Figure 1 As shown, this embodiment provides a backflow warning system for a rubber flap check valve, which includes a check valve, an embedded magnet 2, a magnetic induction sensor 3, a watertight cable 4, and a warning detection module 5.

[0027] The check valve consists of a valve body 1, a rubber flap 7, and a valve cover 8. The inner wall of the valve body 1 is provided with a supporting inclined surface 6 near the valve cover 8. The angle between the supporting inclined surface 6 and the inner wall of the valve body 1 relative to the preset fluid direction is 45 degrees, while the angle between the inclined surface 9 and the inner wall of the valve body 1 relative to the preset fluid direction is 135 degrees.

[0028] Meanwhile, the inclined surface 9 of the valve body 1 and the tongue of the rubber flap 7 are both provided with internal threads at a 45° inclination angle, and the two internal threads are coaxial. The embedded magnet 2 is a strong cylindrical magnet with an external thread and a seat. Its external thread seat material is nylon non-magnetic material. It is embedded in the rubber flap 7 through an M6 external thread. The rubber flap 7 is provided with an M6 internal thread at a 45° inclination angle. The magnetic pole surface of the embedded magnet 2 is 3mm away from the bottom plane of the rubber flap 7. The magnetic induction sensor 3 is a cylindrical shape with stainless steel external threads. It is locked and fixed with the internal thread hole opened at the inclined surface 9. The end face is flush and the sealing method is a 55° conical pipe thread seal.

[0029] The sensing plane of the magnetic induction sensor 3 is parallel to the magnetic pole plane of the embedded magnet 2. When the rubber flap 7 and the inclined surface 9 are completely closed, the sensing plane of the magnetic induction sensor 3 and the magnetic pole plane of the embedded magnet 2 are 3mm apart. By collecting the voltage signal between the magnetic induction sensor 3 and the embedded magnet 2, the positional distance between the rubber flap 7 and the inclined surface 9 of the valve body 1 is sensed, so as to effectively detect the opening and closing state of the rubber flap 7 and thus determine whether there is backflow. The maximum response frequency is 1000Hz and the response time is less than 0.1ms.

[0030] One end of the watertight cable 4 is connected to the magnetic induction sensor 3, and the other end is connected to the external early warning detection module 5. The cable joints and connections are all sealed with potting compound, and the protection level is IP68 to ensure normal use in underwater environments.

[0031] The early warning detection module 5 features self-capacity, long cycle and low power consumption, and sensing and warning capabilities. It is internally equipped with hardware such as a microcontroller, wireless communication module, power supply, memory, and warning lights to realize control, transmission, power supply, alarm and other functions.

[0032] The early warning detection module 5 is designed as a cuboid, tightly fitting the valve body 1. Its connection is secured with bolts, making the early warning detection module 5 and valve body 1 an integrated unit. Simultaneously, the early warning detection module 5 is connected to the magnetic induction sensor 3 via a watertight cable 4. It can compare the data detected by the magnetic induction sensor 3 with a set threshold in real time, outputting a feedback signal to achieve precise control of the real-time backflow signal detection of the check valve, meeting the requirements for rapid response and completing detection tasks such as sensor data acquisition, data processing, real-time early warning, and online communication. The detection method uses the magnetic induction sensor 3 to collect real-time changes in the position of the rubber flap 7 of the check valve and the inclined surface 9 of the valve body 1, determining the opening and closing state of the rubber flap 7. The collected data is compared and analyzed with a preset normal threshold to determine whether backflow exists, and the data is remotely transmitted back to the backend management system. Furthermore, when a backflow signal is detected, the early warning detection module 5 triggers an early warning mechanism, providing audible and visual alarm feedback to the backend management system and reminding staff to promptly investigate the risk. The early warning system is reset after the risk is resolved.

[0033] More specifically, such as Figure 2 The following are the specific implementation steps of the above system:

[0034] The first step is to activate the early warning detection system;

[0035] The second step is for the early warning system to collect real-time data on the opening and closing status of the rubber flap in the rubber flap check valve.

[0036] The third step is to compare and analyze the collected data with the predetermined threshold and then feed the data back to the early warning control system.

[0037] The fourth step is to determine if there is a backflow phenomenon. If so, proceed to the next step; otherwise, return to the second step.

[0038] Fifth, the system triggers the early warning mechanism, issuing audible and visual warnings and providing feedback to the backend management system to assist staff in making quick decisions;

[0039] Step 6: After the emergency response, the backflow warning system is reset, and the system continues to perform testing.

[0040] In summary, the system provided by this utility model has advantages such as high-precision detection, self-contained operation, long-cycle low power consumption, sensing and warning, and remote control. It can operate with extremely low power consumption for a long time without relying on external energy, realize real-time sensing and monitoring of backflow in check valves, and issue early warning signals according to preset thresholds. This solves the problem that backflow pollution in water supply systems is difficult to detect in a timely manner, improves operation and maintenance efficiency, and ensures the safe and stable operation of the fluid transport system in water supply pipelines.

[0041] Furthermore, the terms "upper," "lower," "inner," "outer," "front," and "rear" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise specifically stated, the relative steps, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this invention.

[0042] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

[0043] Finally, it should be noted that the above-described embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model. These modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A rubber flap check valve backflow early warning system, characterized by, The application relates to a check valve and a pre-warning mechanism, which are used for connecting two pipes and are characterized by the following technical scheme: the check valve comprises a valve body, a rubber flap and a valve cover, the side wall of the valve body is provided with an installation opening and a valve cover matched with the installation opening, the valve cover is provided with the rubber flap which is used for blocking the backflow of fluid and can swing freely on one side of the valve body, the inner wall of the valve body is provided with an inclined surface which is matched with the free end of the rubber flap on the side opposite to the free end of the rubber flap, and the rubber flap and the inner wall of the valve body form a Z-shaped structure along a preset fluid direction through the inclined surface. The pre-warning mechanism comprises a pre-warning detection module arranged on the outer wall of the valve body, an embedded magnet arranged on the free end of the rubber flap and a magnetic induction sensor embedded in the inclined surface, and the pre-warning detection module judges whether the backflow phenomenon exists according to the magnetic field strength value collected by the magnetic induction sensor.

2. The rubber flap check valve reverse flow warning system of claim 1, wherein, The inner wall of the valve body is provided with a supporting inclined surface close to the valve cover, and the included angle between the supporting inclined surface and the inner wall of the valve body is 45 degrees along the preset fluid direction.

3. The rubber flap check valve reverse flow warning system of claim 1, wherein, The included angle between the inclined surface and the inner wall of the valve body is 135 degrees along the preset fluid direction.

4. The rubber flap check valve reverse flow warning system of claim 1, wherein, When the rubber flap is matched with the inclined surface of the valve body, the magnetic pole surface of the embedded magnet and the induction surface of the magnetic induction sensor are arranged on the same center line.

5. The rubber flap check valve reverse flow warning system of claim 4, wherein, The induction surface of the magnetic induction sensor is spaced apart from the magnetic pole surface of the magnet by 3 mm.

6. The rubber flap check valve reverse flow warning system of claim 1, wherein, The magnetic induction sensor adopts an outer thread covering cylindrical structure, and the inclined surface of the valve body is vertically provided with an inner thread hole matched with the outer thread of the outer thread covering cylindrical structure.

7. The rubber flap check valve reverse flow warning system of claim 1, wherein, The pre-warning detection module comprises a microcontroller, a wireless communication module, a power supply, a memory and a warning light.

8. The rubber flap check valve reverse flow warning system of claim 7, wherein, The pre-warning detection module further comprises a polyformaldehyde insulation anticorrosion shell used for sealing and preventing signal shielding protection.

9. The rubber flap check valve reverse flow warning system of claim 1, wherein, The embedded magnet comprises a threaded seat penetrating the free end of the rubber flap and a magnet matched with the threaded seat and provided with an outer thread.

10. The rubber flap check valve reverse flow warning system of claim 9, wherein, The threaded seat adopts a nylon non-magnetic conductor.

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