Manhole cover capable of distinguishing rain sewage flow direction

Abstract

The utility model discloses a manhole cover capable of distinguishing the flow direction of rain sewage, which consists of an indication component embedded in the manhole cover and an air bag component in a well, and the indication component and the air bag component are in wireless communication. The air bag assembly comprises an annular air bag and a mounting plate, a flow velocity meter and a power supply are fixed on the air bag assembly, the flow velocity meter is provided with a wireless communication module, and a probe is located in a screen below the air bag and transmits data through a radio frequency antenna; an air bag guiding structure is arranged in the well and composed of a guiding rod, a fixing base, an adjusting rod and the like, and vertical suspension of an air bag is guaranteed. The top of the indicating assembly is provided with a digital display unit. The manhole cover detects the flow velocity and the flow direction through suspension of the air bag assembly, data can be wirelessly transmitted to the manhole cover for display without uncovering, the potential safety hazard of uncovering is eliminated, and the detection efficiency is improved; the screen structure and the guiding design avoid impurity interference and flow direction misjudgment, compared with a traditional method, the water flow direction can be recognized more accurately, the method is suitable for complex drainage scenes, and an efficient and reliable scheme is provided for urban drainage system detection.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover technology, and in particular to a manhole cover that can distinguish the direction of rainwater and sewage flow. Background Technology

[0002] In urban drainage systems and various engineering fields involving piped water flow, inspection wells are crucial facilities. Their main functions include inspecting and maintaining pipes, connecting different pipes to ensure the smooth flow and integrity of the drainage system, regulating flow, preventing pollution, and providing safety protection. For example, in urban sewers, inspection wells facilitate regular inspections by staff, allowing for timely removal of accumulated sewage and silt, preventing problems such as odors and blockages that could negatively impact the urban environment and residents' lives.

[0003] To determine whether there is a blockage or pollution source in a sewage pipe, it is necessary to check the flow direction of sewage in adjacent pipes. However, traditional methods for identifying the water flow direction in manholes have significant flaws. One common method is to manually open the manhole cover and use a level to check the slope of the surrounding ground to infer the water flow direction. However, this method is limited by the complexity and inaccuracy of ground slopes. For manholes buried deep underground or in areas with complex terrain, the ground slope and the water flow direction inside the manhole are not entirely consistent, leading to significant deviations in the judgment results. Furthermore, determining the water flow direction by placing simple tools such as cardboard or floating objects and observing their movement is easily affected by complex water flow conditions inside the manhole. For example, under conditions of high water levels or full pipe operation, water collides with the manhole wall, creating backflow and causing incorrect surface water flow direction, making the judgment based on the movement of floating objects inaccurate. Moreover, in some cases, visual inspection alone, even with the manhole cover open, can result in the visually estimated water flow direction being opposite to the actual direction.

[0004] Traditional methods for identifying the direction of water flow in manholes require opening the manhole cover beforehand. This operation is not only time-consuming and labor-intensive but also has many drawbacks. Firstly, frequent opening of the manhole cover increases the workload of workers and reduces work efficiency. Secondly, opening the manhole cover can disrupt traffic, causing congestion in busy areas and creating safety hazards, such as pedestrians or vehicles accidentally falling into the manhole. Furthermore, in harsh environments, such as extreme heat, cold, or heavy rain, the difficulty and danger of opening the manhole cover increase further. Moreover, in certain special areas, such as chemical industrial parks or flammable and explosive sites, opening the manhole cover could lead to safety accidents. Therefore, there is an urgent need for a technical solution that can efficiently and accurately identify the direction of water flow in manholes without opening the manhole cover, thus overcoming the shortcomings of existing technologies. Summary of the Invention

[0005] The technical problem to be solved by this utility model is that the identification of the water flow direction in the inspection well requires opening the well cover for detection.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a manhole cover that can distinguish the direction of rainwater and sewage flow, including an indicator component embedded in the manhole cover and an airbag component arranged in the manhole. The airbag component is provided with a water flow velocity and flow direction detection module. The airbag component and the indicator component are wirelessly connected. A digital display unit is provided at the top of the indicator component. A guide structure for the airbag component is vertically arranged in the manhole.

[0007] Preferably, the airbag assembly includes an annular airbag, a mounting plate fixedly connected in the airbag, a flow meter and a power supply fixed on the mounting plate, the flow meter embedding a wireless communication module that converts detection data into wireless signals and transmits them to the indicating component, a cover plate sealing the flow meter is installed on the top of the mounting plate, an antenna is installed on the cover plate, the wireless communication module is connected to the antenna through a radio frequency interface, and the probe of the flow meter detection end penetrates the mounting plate and is located below the airbag.

[0008] Preferably, a hemispherical screen structure is installed at the bottom of the mounting plate, and the probe is located inside the screen structure.

[0009] Preferably, the edge of the screen structure is coaxially fixedly connected with an annular fixing ring, and a screw is fixed on the fixing ring. The edges of the mounting plate and the cover plate are provided with through holes for the screw to pass through, and a sealing washer is connected to the nut for locking the cover plate.

[0010] Preferably, a mounting sleeve is vertically fixed at the bottom of the mounting plate, the probe is located inside the mounting sleeve, and a sealing ring is provided inside the mounting sleeve, with the inner side of the sealing ring fitting against the probe.

[0011] Preferably, an annular sealing strip is connected to the inner side of the airbag, and the mounting plate is fixedly connected to the inner side of the sealing strip, covering the joint between the mounting plate and the airbag.

[0012] Preferably, a pull rope is fixedly connected to the top of the cover plate, a limit block is fixedly connected to the movable end of the pull rope, a through-ring is fixed at the wellhead of the inspection well, the movable end of the pull rope passes through the through-ring, and the outer diameter of the limit block is larger than the inner diameter of the through-ring.

[0013] Preferably, the guide structure includes a guide rod vertically fixed to the bottom of the inspection well and a fixed seat fixed to the top of the inspection well. The movable end of the fixed seat is provided with a bent pipe, and the end of the bent pipe is rotatably connected to an adjusting rod. The movable end of the adjusting rod is connected to the top of the guide rod by a pin, and the airbag assembly is slidably connected to the guide rod.

[0014] Preferably, a cable is fixedly connected to the outer side of the movable end of the adjusting rod, a limit block is fixedly connected to the top of the fixed seat, the cable passes through the limit block, and a connecting ring is fixedly connected to the movable end of the cable.

[0015] Preferably, a secondary cover plate is hinged to the middle of the cover plate, and the indicating component is located below the secondary cover plate.

[0016] This utility model provides a manhole cover that can distinguish the direction of rainwater and sewage flow, which has the following beneficial effects.

[0017] 1. The airbag assembly incorporates a flow meter and a wireless communication module. Suspended in the water flow within the well via a guiding structure, it monitors flow velocity and direction data in real time and transmits this data wirelessly to the indicator component on the manhole cover. Workers can obtain the water flow direction simply by observing the digital display unit on the manhole cover from the ground, completely eliminating the need to open the cover. This removes safety hazards such as falls, traffic disruptions, and risks of flammable and explosive environments, while also saving manpower and improving efficiency.

[0018] 2. The flow meter probe is located within a screen structure beneath the airbag. The screen filters out large particles of impurities, preventing interference from debris in the water flow. The airbag is vertically suspended by a guide rod, ensuring the probe is always perpendicular to the water flow direction, avoiding misjudgments of surface flow direction caused by backflow from the well wall or full-pipe flow. Compared to traditional floating object methods or ground slope inference methods, it can more accurately reflect the true water flow direction, and is especially suitable for deep-buried pipelines, complex terrain, or high-water-level operating scenarios. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 This is a schematic diagram of the internal structure of an embodiment of the present utility model.

[0021] Figure 2 This is a schematic diagram of the internal structure of the airbag in an embodiment of this utility model.

[0022] Figure 3 This is a bottom view of the airbag in an embodiment of this utility model.

[0023] Figure 4 This is a schematic diagram of the airbag structure in an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the guide rod in an embodiment of the present invention.

[0025] In the diagram: 1. Inspection well; 2. Well cover; 3. Secondary cover plate; 4. Indicator assembly; 5. Airbag assembly; 51. Airbag; 52. Mounting plate; 53. Sealing strip; 54. Flow meter; 55. Mounting sleeve; 56. Power supply; 57. Probe; 58. Cover plate; 59. Connector; 6. Guide rod; 7. Pull rope; 8. Fixing seat; 9. Adjusting rod; 10. Pull cable; 11. Limiting block; 12. Connecting ring. Detailed Implementation

[0026] like Figure 1-5 As shown, this utility model provides a manhole cover that can distinguish the direction of rainwater and sewage flow, including an indicator component 4 embedded in the manhole cover 2 and an airbag component 5 arranged in the manhole 1. The airbag component 5 is provided with a water flow velocity and flow direction detection module. The airbag component 5 and the indicator component 4 are wirelessly connected. A digital display unit is provided at the top of the indicator component 4. A guide structure for the airbag component 5 is vertically arranged in the manhole 1.

[0027] The airbag assembly 5 floats on the sewage. As the sewage passes by, the airbag assembly 5 detects the flow rate and direction of the sewage and wirelessly transmits the detected data to the indicator assembly 4. After converting the wireless data, the indicator assembly 4 displays the flow rate and direction information measured by the airbag assembly 5 on the display screen set on the indicator assembly 4.

[0028] like Figure 2 and Figure 3 As shown. The airbag assembly 5 includes an annular airbag 51, a mounting plate 52 fixedly connected to the airbag 51, a flow meter 54 fixed on the mounting plate 52, and a power supply 56. The flow meter 54 has an embedded wireless communication module that converts the detection data into wireless signals and transmits them to the indicator assembly 4. A cover plate 58 sealing the flow meter 54 is installed on the top of the mounting plate 52. An antenna is installed on the cover plate 58. The wireless communication module is connected to the antenna through a radio frequency interface. The probe 57 of the detection end of the flow meter 54 penetrates the mounting plate 52 and is located below the airbag 51. The flow rate meter 54, used to detect the flow velocity and direction of water, is directly installed on the mounting plate 52 inside the airbag 51. It is covered by the cover plate 58, which seals the flow rate meter 54 and the power supply 56 to ensure their stability during operation underground. The power supply 56 supplies power to the flow rate meter 54. After detecting the flow velocity and direction data, the flow rate meter 54 converts the detected data into wireless signal data and sends the wireless signal to the indicator component 4 through the Bluetooth module and antenna.

[0029] like Figure 3 As shown, to avoid interference from pollutants in the wastewater with the measurement of probe 57, a hemispherical screen structure is installed at the bottom of the mounting plate 52, and probe 57 is located inside the screen structure. Probe 57 is inserted below the airbag 51, ensuring contact with the wastewater while preventing large-volume pollutants in the wastewater from contacting probe 57, thus ensuring measurement accuracy; it also prevents damage to probe 57 from impacts.

[0030] like Figure 2 and Figure 3As shown, to facilitate the assembly and disassembly of the mounting plate 52 and the screen structure, and to facilitate the replacement and maintenance of the internal testing equipment and power supply 56, an annular fixing ring is coaxially fixed to the edge of the screen structure. A screw is fixed to the fixing ring. Both the mounting plate 52 and the cover plate 58 have through holes on their edges for the screw to pass through. A sealing washer is connected to the locking nut of the cover plate 58. By unscrewing the nut located on top of the cover plate 58, the screen structure and the cover plate 58 can be removed from the mounting plate 52, allowing maintenance of the equipment on the mounting plate 52.

[0031] like Figure 2 and Figure 3 As shown, a mounting sleeve 55 is vertically fixed to the bottom of the mounting plate 52. The probe 57 is located inside the mounting sleeve 55, and a sealing ring is provided inside the mounting sleeve 55, with the inner side of the sealing ring fitting against the probe 57. The mounting sleeve 55 is used to fix the probe 57, ensuring the stability of the probe 57 installation; the sealing ring enhances the sealing performance of the inner side of the mounting sleeve 55, thereby ensuring the sealing performance of the flow meter 54 installation area.

[0032] like Figure 2 and Figure 3 As shown. An annular sealing strip 53 is connected to the inner side of the airbag 51. The inner side of the sealing strip 53 is fixedly connected to the mounting plate 52, and the sealing strip 53 covers the joint between the mounting plate 52 and the airbag 51. By covering the joint with the sealing strip 53, and with the sealing strip 53 provided on both the top and bottom surfaces of the mounting plate 52, the entire joint is sealed.

[0033] like Figure 1 and Figure 4 As shown. A pull rope 7 is fixedly connected to the top of the cover plate 58. A limit block is fixedly connected to the movable end of the pull rope 7. A through-ring is fixed at the opening of the inspection well 1. The movable end of the pull rope 7 passes through the through-ring, and the outer diameter of the limit block is larger than the inner diameter of the through-ring. A connector 59 is fixedly welded to the middle of the top of the cover plate 58. A tubular structure is provided on the top of the connector 59, and the bottom end of the pull rope 7 is fixed inside the tubular structure. When maintenance of the airbag assembly 5 is required, the airbag assembly 5 is pulled up by opening the well cover 2 and using the pull rope 7. The airbag assembly 5 is then separated from the guide structure, and maintenance is performed on the airbag assembly 5 on the ground, ensuring the safety of the maintenance work and improving the efficiency of the maintenance.

[0034] like Figure 1 and Figure 5As shown. The guide structure includes a guide rod 6 vertically fixed to the bottom of the inspection well 1 and a fixed seat 8 fixed to the top of the inspection well 1. The movable end of the fixed seat 8 is provided with a bent pipe, and the end of the bent pipe is rotatably connected to an adjusting rod 9. The movable end of the adjusting rod 9 is connected to the top of the guide rod 6 by a pin. The airbag assembly 5 is slidably connected to the guide rod 6. When it is necessary to remove the airbag assembly 5 from the guide structure, first pull out the connecting pin between the adjusting rod 9 and the guide rod 6, rotate the adjusting rod 9 to separate the adjusting rod 9 and the guide rod 6, and then lift the airbag assembly 5 to remove the airbag assembly 5 from the top of the guide rod 6.

[0035] like Figure 5 As shown. A cable 10 is fixedly connected to the outer side of the movable end of the adjusting rod 9. A limit block 11 is fixedly connected to the top of the fixed base 8. The cable 10 passes through the limit block 11, and a connecting ring 12 is fixedly connected to the movable end of the cable 10. After the connecting pin between the adjusting rod 9 and the guide rod 6 is pulled out, the cable 10 is pulled by the connecting ring 12. The cable 10 pulls the bottom end of the adjusting rod 9, causing the adjusting rod 9 to rotate and separating the adjusting rod 9 from the guide rod 6. A protrusion is provided on one side of the top of the guide rod 6, and a groove that matches the protrusion is provided at the bottom of the adjusting rod 9. After the cable 10 is released, the adjusting rod 9 rotates under the action of gravity, so that the groove and the protrusion cooperate. At this time, the connecting pin can pass through the adjusting rod 9 and the guide rod 6 at the same time.

[0036] like Figure 1 As shown, to protect the indicator component 4 while also allowing for convenient viewing, a secondary cover plate 3 is hinged to the middle of the manhole cover 2, with the indicator component 4 located below the secondary cover plate 3. After opening the locking mechanism of the secondary cover plate 3 with a special key, the secondary cover plate 3 can be flipped up to view the indicator component 4.

Claims

1. A manhole cover capable of distinguishing the direction of rainwater and sewage flow, characterized in that: It includes an indicator component (4) embedded in the manhole cover (2) and an airbag component (5) arranged in the inspection well (1). The airbag component (5) is equipped with a water flow velocity and flow direction detection module. The airbag component (5) and the indicator component (4) are wirelessly connected. The top of the indicator component (4) is equipped with a digital display unit. The guide structure of the airbag component (5) is vertically arranged in the inspection well (1).

2. The manhole cover capable of distinguishing the direction of rainwater and sewage flow as described in claim 1, characterized in that: The airbag assembly (5) includes an annular airbag (51), a mounting plate (52) fixedly connected in the airbag (51), a flow meter (54) fixed on the mounting plate (52), and a power supply (56). The flow meter (54) has a wireless communication module embedded in it that converts the detection data into wireless signals and transmits them to the indicator assembly (4). A cover plate (58) sealing the flow meter (54) is installed on the top of the mounting plate (52). An antenna is installed on the cover plate (58). The wireless communication module is connected to the antenna through a radio frequency interface. The probe (57) at the detection end of the flow meter (54) penetrates the mounting plate (52) and is located below the airbag (51).

3. The manhole cover capable of distinguishing the direction of rainwater and sewage flow as described in claim 2, characterized in that: The bottom of the mounting plate (52) is fitted with a hemispherical screen structure, and the probe (57) is located inside the screen structure.

4. The manhole cover capable of distinguishing the direction of rainwater and sewage flow as described in claim 3, characterized in that: The edge of the screen structure is coaxially fixed with an annular fixing ring, and a screw is fixed on the fixing ring. The edges of the mounting plate (52) and the cover plate (58) are provided with through holes for the screw to pass through. A sealing washer is connected to the locking nut of the cover plate (58).

5. A manhole cover capable of distinguishing the direction of rainwater and sewage flow as described in claim 2, characterized in that: The bottom of the mounting plate (52) is vertically fixed with a mounting sleeve (55), and the probe (57) is located inside the mounting sleeve (55). A sealing ring is provided inside the mounting sleeve (55), and the inner side of the sealing ring is in contact with the probe (57).

6. A manhole cover capable of distinguishing the direction of rainwater and sewage flow as described in claim 2, characterized in that: The airbag (51) has an annular sealing strip (53) connected to its inner side. The inner side of the sealing strip (53) is fixedly connected to the mounting plate (52), and the sealing strip (53) covers the joint between the mounting plate (52) and the airbag (51).

7. A manhole cover capable of distinguishing the direction of rainwater and sewage flow as described in claim 2, characterized in that: A pull rope (7) is fixedly connected to the top of the cover plate (58). A limit block is fixedly connected to the movable end of the pull rope (7). A through ring is fixed at the wellhead of the inspection well (1). The movable end of the pull rope (7) passes through the through ring. The outer diameter of the limit block is larger than the inner diameter of the through ring.

8. A manhole cover capable of distinguishing the direction of rainwater and sewage flow as described in claim 1, characterized in that: The guide structure includes a guide rod (6) vertically fixed at the bottom of the inspection well (1) and a fixed seat (8) fixed at the top of the inspection well (1). The movable end of the fixed seat (8) is provided with a bend, and the end of the bend is rotatably connected to an adjusting rod (9). The movable end of the adjusting rod (9) is connected to the top of the guide rod (6) by a pin. The airbag assembly (5) is slidably connected to the guide rod (6).

9. A manhole cover capable of distinguishing the direction of rainwater and sewage flow as described in claim 8, characterized in that: A cable (10) is fixedly connected to the outer side of the movable end of the adjusting rod (9), a limit block (11) is fixedly connected to the top of the fixed seat (8), the cable (10) passes through the limit block (11), and a connecting ring (12) is fixedly connected to the movable end of the cable (10).

10. A manhole cover capable of distinguishing the direction of rainwater and sewage flow as described in claim 1, characterized in that: The manhole cover (2) is hinged to a secondary cover plate (3) in the middle, and the indicator component (4) is located below the secondary cover plate (3).

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