Device for detecting underwater check valve
By designing a device for detecting underwater check valves, utilizing air pressure regulation and camera observation, the problem of the inability to detect the opening and closing of check valves and drainage performance in existing technologies has been solved, enabling efficient and accurate channel condition assessment and maintenance.
Patent Information
- Application Number
- CN202520348232.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-03-03
AI Technical Summary
Existing technologies cannot effectively detect the opening, closing, and drainage performance of underwater check valves, especially when the structure and appearance are intact but the function is malfunctioning, leading to potential safety hazards in channel water supply.
A device was designed that includes a detection hood, a drainage pressure regulating device, a pressure sensor, a camera, and a data acquisition system. The device determines the opening and closing of the check valve and the drainage performance by adjusting the air pressure in the detection chamber and observing the pressure difference, and observes the water flow by combining the camera.
It enables comprehensive testing of check valves without interrupting water flow, providing a basis for channel stability evaluation and maintenance, improving testing efficiency and accuracy, and reducing costs.
Smart Images
Figure CN223741976U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to detection equipment technical field, in particular to a device for detecting underwater check valve. BACKGROUND
[0002] Open channel gravity flow is one of the most common water delivery methods in major water diversion projects in China, often spanning several hundred to thousands of kilometers for water resources scheduling. Due to different hydrogeological conditions, when crossing high groundwater level areas, the slope soil strength of the channel is easily reduced by water, causing slope instability or toppling damage of the concrete lining plate at the bottom of the channel under the action of large water pressure, threatening the safety of channel water delivery.
[0003] Using check valve internal drainage is an effective measure to solve the problem of high groundwater level, which can not only prevent channel water leakage, but also timely drain groundwater. However, this method has high requirements for the reliability of the check valve. When the groundwater level is higher than the channel water level, the valve opens in time to drain groundwater into the channel; when the groundwater level is lower than the channel water level, the valve closes in time to prevent channel water leakage. Currently, the main open channel gravity flow projects, such as the South-to-North Water Diversion Middle Route Main Channel, mainly use ball check valves, flap check valves, and differential pressure amplification check valves. However, the check valve is installed underwater, and the channel is supplied with water all year round. Silt, shellfish, and other substances in the water can cause check valve clogging and even damage, leading to check valve failure and affecting channel water supply safety.
[0004] Currently, the detection of channel check valves mainly involves underwater divers and underwater robots checking the appearance of the check valve to determine whether the structure is complete, such as whether the ball of a ball check valve is damaged or lost, whether the flap structure is complete, etc. If the structure is not complete, the check valve is considered to be invalid. However, for cases where the appearance and structure are complete, but the opening and closing drainage function is lost or the valve body is blocked, the existing appearance inspection method cannot determine the performance of the check valve. Therefore, it is necessary to construct a differential pressure between the inside and outside of the check valve to detect the performance of the check valve. However, there is currently no corresponding detection device and method. UTILITY MODEL CONTENTS
[0005] The utility model aims to provide a device for detecting underwater check valves to solve the problems existing in the prior art and facilitate in-situ detection of the performance of the check valve.
[0006] To achieve the above-mentioned purpose, the utility model provides the following solutions:
[0007] The utility model provides a device for detecting underwater check valve, include: detection cover, drainage pressure regulating device, pressure sensor, camera and data acquisition system, detection cover one side opening, detection cover is used for buckling on the channel wall surface and covers the check valve of waiting for detecting, the detection cover with the channel wall surface forms the detection cavity of airtight between, drainage pressure regulating device is used for draining the water in the detection cavity and adjusts the air pressure in the detection cavity, pressure sensor with camera all set up in the detection cover, pressure sensor with camera all with data acquisition system communication connection, data acquisition system is used for gathering the information that pressure sensor and camera obtains and displays.
[0008] Preferably, it further comprises a fixed cover, one side of the fixed cover is open, the detection cover is fixedly arranged in the fixed cover, the open side edge of the fixed cover and the open side edge of the detection cover are located on the same plane, the fixed cover is used for buckling on the channel wall surface, and the drainage pressure regulating device can also drain all or part of the water in the fixed cover.
[0009] Preferably, the open side edge of the fixed cover and the open side edge of the detection cover are both fixedly provided with annular sealing pads.
[0010] Preferably, the fixed cover and the detection cover are both spherical cap structures.
[0011] Preferably, the drainage pressure regulating device comprises an air pump and a water pumping and air exhausting device, the water pumping and air exhausting device and the air pump cooperate to drain the water in the detection cavity and the fixed cover, the air pump is used for inflating and pressurizing the detection cavity, and the water pumping and air exhausting device is also used for exhausting the gas in the detection cavity and the fixed cover to reduce pressure.
[0012] Preferably, it further comprises a four-way valve and two water and air connecting pipes, one end of each of the two water and air connecting pipes is arranged in the detection cover and the fixed cover respectively, and the other end of each of the two water and air connecting pipes is communicated with the air pump and the water pumping and air exhausting device through the four-way valve.
[0013] Preferably, two handles are arranged outside the fixed cover.
[0014] Compared with the prior art, the utility model has the following technical effects:
[0015] (1) The utility model realizes underwater detection of the working performance of the check valve, such as opening and closing and drainage, of the channel under the condition of not stopping water on the basis of check valve structure appearance detection, and then the state of the check valve can be comprehensively mastered, thereby providing accurate basis for evaluating channel stability and subsequent maintenance and replacement of the check valve.
[0016] (2) The utility model discloses a fixed cover is fixed on the channel wall through setting fixed cover, and the fixed mode is simple and easy to operate.
[0017] (3) The fixed cover and the detection cover can be separated from the channel wall by inflating, filling water, pressurizing in the fixed cover after detection, and the operation is simple, and the detection efficiency is high.
[0018] (4) The device can be integrated on the underwater mobile robot platform to realize unmanned detection, reduce detection cost and improve detection efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the embodiments will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the drawings for the ordinary skilled in the art without creating labor.
[0020] Figure 1 The structural diagram of the device for detecting the underwater check valve provided by the utility model embodiment is shown in the figure.
[0021] Figure 2 The sectional view of the underwater assembly is shown in the figure. Figure 1
[0022] The top view of the underwater assembly is shown in the figure. Figure 3 Figure 1 The schematic diagram of water in the fixed cover is pumped out and depressurized is shown in the figure.
[0023] Figure 4 The schematic diagram of pressurizing and draining water in the detection cavity is shown in the figure.
[0024] Figure 5 The schematic diagram of air in the detection cavity is pumped out and depressurized is shown in the figure.
[0025] Figure 6 In the figure, 1 is an underwater assembly, 2 is an overwater assembly, 3 is a connecting pipeline, 4 is a fixed cover, 5 is a detection cover, 6 is a pipeline connecting port, 7 is a pressure sensor, 8 is a camera, 9 is a data acquisition system, 10 is an inflator pump, 11 is a water pumping and air exhausting device, 12 is a pressure control system, 13 is a water and gas connecting pipe, 14 is a transmission line, 15 is a sealing gasket, 16 is a water and gas connecting port, 17 is a handle, 18 is a circuit connecting port, 19 is a drainage pressure regulating inner pipe, and 100 is a check valve. DETAILED DESCRIPTION
[0026]
[0027] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0028] In order to make the above-mentioned purposes, features and advantages of the present application more apparent, clear and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.
[0029] The embodiments of the present application will be described below with reference to the drawings. Figures 1 to 6
[0030] The present application provides a device for detecting underwater check valve, comprising: detection cover 5, drainage pressure regulating device, pressure sensor 7, camera 8 and data acquisition system 9, one side of detection cover 5 is open, detection cover 5 is used for buckling on the channel wall surface and covering the check valve 100 to be detected, a closed detection cavity is formed between detection cover 5 and the channel wall surface, the drainage pressure regulating device is used for draining water in the detection cavity and adjusting the air pressure in the detection cavity, the pressure sensor 7 and the camera 8 are both arranged in the detection cover 5, the pressure sensor 7 and the camera 8 are both in communication connection with the data acquisition system 9, and the data acquisition system 9 is used for acquiring information obtained by the pressure sensor 7 and the camera 8 and displaying.
[0031] The use process is as follows: the detection cover 5 is buckled on the channel wall surface and covers the check valve 100 to be detected, the water in the detection cavity is completely drained by using the drainage pressure regulating device, and then the air pressure in the detection cavity is adjusted by controlling the drainage pressure regulating device to make the pressure difference on both sides of the check valve 100, under normal state, when the air pressure inside the check valve 100 (i.e. in the detection cavity) is greater than the pressure outside the check valve 100, then under the check action of the check valve 100, the pressure difference on both sides will remain stable or stably decrease, but the decreasing amplitude is small, when the air pressure inside the check valve 100 (i.e. in the detection cavity) is less than the pressure outside the check valve 100, then the fluid outside the check valve 100, such as underground water or gas, etc. will flow into the detection cavity through the check valve, and the pressure difference on both sides will gradually decrease or the water inside the check valve 100 can be observed to flow out. Conversely, the check valve 100 is in a damaged state.
[0032] Therefore, the device for detecting underwater check valve provided by the embodiments of the present application realizes the underwater detection of the opening and closing, drainage and other working performances of the check valve under the condition that the channel does not stop water, and thus the state of the check valve can be comprehensively mastered, which provides an accurate basis for evaluating the channel stability and subsequent maintenance and replacement of the check valve.
[0033] In some embodiments, the utility model embodiment still includes fixed cover 4, one side of fixed cover 4 is open, detection cover 5 is fixedly arranged in fixed cover 4, the open side edge of fixed cover 4 and the open side edge of detection cover 5 are located on the same plane, fixed cover 4 is used for buckling on the channel wall surface, and the drainage pressure regulating device can also drain all or part of water in fixed cover 4.
[0034] The utility model discloses a fixed cover 4 is arranged to fix detection cover 5 on the channel wall surface, and the fixing mode is simple and easy to operate.
[0035] The fixing process is as follows:
[0036] After the diver conducts appearance inspection on the check valve, positions the appearance-intact check valve to be detected, covers detection cover 5 on the check valve, makes the detection cavity can completely cover the check valve inside, the diver assists the press fixed cover 4, the pressure control system 12 on the bank controls the drainage pressure regulating device to drain the water in fixed cover 4, then forms vacuum environment after pumping out, makes fixed cover 4 anchor on the channel wall surface under the action of water pressure, and the channel wall surface is generally lining plate.
[0037] In some embodiments, the open side edges of the fixed cover 4 and the detection cover 5 are fixedly provided with annular sealing pads 15.
[0038] The utility model embodiment improves the sealing property.
[0039] The annular sealing pad 15 is an elastic rubber waterstop, which is bonded to the edge of the opening side of the fixed cover 4 and the detection cover 5.
[0040] In some embodiments, the fixed cover 4 and the detection cover 5 are both in a spherical cap structure.
[0041] The spherical cap structure is the structure remaining after cutting a part of a sphere with a plane.
[0042] The central angles corresponding to the arc lengths of the spherical sections of the fixed cover 4 and the detection cover 5 are different, and the two are welded together at the top by a connecting rod.
[0043] In some embodiments, the drainage pressure regulating device includes an air pump 10 and a water pumping and air exhausting device 11, which cooperate to drain the water in the detection cavity and the fixed cover 4, the air pump 10 is used to inflate and pressurize the detection cavity, and the water pumping and air exhausting device 11 is also used to exhaust the gas in the detection cavity and the fixed cover 4 to reduce the pressure.
[0044] This embodiment can realize water pumping and pressure regulation of the detection cover 5 and the fixed cover 4.
[0045] In this embodiment, it is difficult to drain all the water in the fixed cover 4 and the detection cover 5 only by using the drainage pressure regulating device, so the air pump 10 is needed to cooperate with the drainage.
[0046] In some embodiments, the utility model embodiment further includes a four-way valve and two water-air connection pipes 13, one end of the two water-air connection pipes 13 is arranged in the detection cover 5 and the fixed cover 4 respectively, and the other end of the two water-air connection pipes 13 is communicated through the four-way valve and the air pump 10 and the water pumping and air exhausting device 11.
[0047] The four ports of the four-way valve are communicated with the two water-air connection pipes 13, the air pump 10 and the water pumping and air exhausting device 11 respectively, and each port of the four-way valve is configured with a manual on-off valve or an electric on-off valve. The four-way valve can realize the communication of the air pump 10 and any one of the water-air connection pipes 13 and the communication of the water pumping and air exhausting device 11 and any one of the water-air connection pipes 13.
[0048] The above four-way valve realizes the purpose of the communication of the air pump 10 and any one of the water-air connection pipes 13 and the communication of the water pumping and air exhausting device 11 and any one of the water-air connection pipes 13.
[0049] The embodiment realizes the purpose of using a set of water drainage pressure regulating device to pump water and regulate pressure in the two independent spaces in the fixed cover 4 and the detection cover 5.
[0050] Of course, in some embodiments, a set of water drainage pressure regulating device can be corresponded to each cover. That is, two water drainage pressure regulating devices are included, one of which is used for pumping water and regulating pressure in the detection cover 5, and the other is used for pumping water and regulating pressure in the fixed cover 4.
[0051] In some embodiments, the water pumping and air exhausting device 11 can adopt a water-air dual-purpose pump, or a vacuum pump and a water pump, that is, the water pump is responsible for pumping water, and the vacuum pump is responsible for pumping out the gas in the fixed cover 4 and the detection cover 5.
[0052] In some embodiments, the utility model embodiment can further be provided with two water pipes and four air pipes, one water pipe and two air pipes correspond to the fixed cover 4, and the remaining one water pipe and two air pipes correspond to the detection cover 5, the water pipe is used for being communicated with the water pump, and the air pipe is used for being communicated with the vacuum pump and the air pump 10 respectively.
[0053] In some embodiments, the camera 8 and the pressure sensor 7 are connected through the transmission line 14 and the data acquisition system 9, and the transmission line 14 and the pipeline for ventilation and drainage are bundled in the connection pipeline 3.
[0054] In some embodiments, two handles 17 are arranged outside the fixed cover 4.
[0055] In order to facilitate handheld operation.
[0056] In some embodiments, a drainage pressure regulating inner tube 19 is arranged in the detection cover 5 and the fixed cover 4, and the bottom of the drainage pressure regulating inner tube 19 extends downward to facilitate the complete drainage of water in the cover.
[0057] The utility model also provides a kind of method for detecting underwater check valve, comprising: preparation process: a closed detection cavity is structured outside the check valve to be detected;Water in detection cavity is pumped out;
[0058] Detection process: the air pressure in detection cavity is adjusted and the function of check valve is judged whether normal by observing water outlet condition and pressure change condition of check valve.
[0059] The device for detecting underwater check valve provided by the utility model embodiment realizes the underwater detection of the opening and closing of check valve, drainage and other working performances under the condition that channel is not stopped water, and then the state of check valve can be comprehensively mastered, which provides accurate basis for evaluating channel stability and subsequent maintenance and replacement of check valve.
[0060] In some embodiments, during detection, first inflate the detection cavity to make the pressure rise to a set pressure value, if the pressure is applied, the detection cavity can maintain stable pressure or stable decrease but the amplitude does not exceed the set threshold value, then it is judged that the water stopping ability of check valve is normal;
[0061] Gas in detection cavity is discharged to pressure lower than standard atmospheric pressure;Whether water flows out of check valve in decompression process is observed by camera 8, and then whether the opening ability of check valve is normal is judged in combination with pressure change condition and underground water level condition.
[0062] In some embodiments, the check valve is detected by using the device for detecting underwater check valve as described above, and the step of structuring detection cavity body in preparation process comprises:
[0063] The fixed cover 4 and the detection cover 5 are buckled on the channel wall surface, and the water in the fixed cover 4 is pumped out to fix the fixed cover 4 and the detection cover 5 on the channel wall surface by using water pressure.
[0064] The utility model fixes the detection cover 5 on the channel wall surface by setting the fixed cover 4, and the fixing mode is simple and easy to implement.
[0065] The specific detection method is as follows:
[0066] Step one, after the equipment is debugged normally on the channel slope, the diver carries the integrated body of detection cover 5 and fixed cover 4 into the detection area, and simultaneously reads underground water level by using surrounding underground water monitoring instrument.
[0067] Step two, after the diver inspects the check valve, the diver positions the check valve to be detected, covers the check valve with the detection cover 5, and makes the detection cavity cover the check valve; the diver assists in pressing the fixing cover 4, the pressure control system 12 on the bank controls the air pump 10 and the water pumping and air exhausting device 11 to pump out the water in the fixing cover 4, and then forms a vacuum environment by air exhaustion, so that the fixing cover 4 is anchored on the canal bottom lining plate under the action of water pressure.
[0068] Step three, the pressure control system 12 is switched to the loop of the detection cavity, the air pump 10 and the water pumping and air exhausting device 11 are controlled to pump out the water in the fixing cavity, and then pressure test is carried out, the pressure sensor 7 is used to monitor the applied pressure, and the camera 8 is used to observe the water outlet condition of the check valve; if the pressure can be maintained stable or stable decrease but the amplitude is not large after the pressure is applied, it can be judged that the water stopping capacity of the check valve is normal.
[0069] Step four, after the pressure test is completed, the vacuum pump is controlled by the pressure control system 12 to reduce the pressure in the detection cavity, the pressure in the detection cavity is monitored by the pressure sensor 7, so that it is lower than the standard atmospheric pressure (in general, the pressure of underground water outside the check valve is definitely greater than the standard atmospheric pressure); whether water flows out of the check valve during the pressure reduction process is observed by the underwater camera 8. If yes, it indicates that the check valve is unobstructed; if no water flows out until the pressure is reduced to 0.5 standard atmospheric pressure and the underground water level is higher than the canal bottom elevation, it indicates that the check valve is blocked; if the pressure stops reducing after being reduced to 0.5 standard atmospheric pressure, the pressure gradually rises, but no water flows out, and the underground water level is lower than the canal bottom elevation, it indicates that the check valve is not blocked, but the drainage performance needs to be detected and judged after the underground water level rises.
[0070] The principle and implementation mode of the specific examples in the utility model are described, and the above embodiment is only used to help understand the method and core idea of the utility model; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the utility model. In conclusion, the content of the specification should not be understood as the limitation of the utility model.
Claims
1. An apparatus for detecting a water under reverse valve, the apparatus comprising: The utility model relates to a detection cover, drainage pressure regulating device, pressure sensor, camera and data acquisition system, one side of the detection cover is open, the detection cover is used for buckling on the channel wall surface and covers the check valve to be detected, the detection cover and the channel wall surface form the closed detection cavity between, the drainage pressure regulating device is used for draining the water in the detection cavity and adjusts the air pressure in the detection cavity, the pressure sensor and the camera are all arranged in the detection cover, the pressure sensor and the camera are all connected with data acquisition system communication, and the data acquisition system is used for gathering the information obtained by the pressure sensor and the camera and displays. Further comprising a fixed cover, one side of the fixed cover is open, the detection cover is fixedly arranged in the fixed cover, the open side edge of the fixed cover and the open side edge of the detection cover are located on the same plane, the fixed cover is used for buckling on the channel wall surface, and the drainage pressure regulating device can also drain all or part of the water in the fixed cover.
2. The apparatus of claim 1, wherein: The open side edge of the fixed cover and the detection cover is fixedly provided with a ring-shaped sealing gasket.
3. The apparatus of claim 2, wherein: The fixed cover and the detection cover are both spherical cap structure.
4. The apparatus of claim 2, wherein: The drainage pressure regulating device includes an air pump and a water pumping and air exhausting device, the water pumping and air exhausting device and the air pump cooperate to drain the water in the detection cavity and the fixed cover, the air pump is used for air charging and pressurizing in the detection cavity, and the water pumping and air exhausting device is also used for exhausting the gas in the detection cavity and the fixed cover to reduce pressure.
5. The apparatus of claim 2, wherein: Further comprising a four-way valve and two water and air connecting pipes, one end of the two water and air connecting pipes is arranged in the detection cover and the fixed cover respectively, and the other end of the two water and air connecting pipes is communicated through the four-way valve, the air pump and the water pumping and air exhausting device.
6. The apparatus of claim 5, wherein: Two handles are arranged outside the fixed cover.
7. The apparatus of claim 2, wherein: