Performance detection device and method for hydraulic engineering slope check valve in working state

Abstract

The invention provides a performance detection device and method for a hydraulic engineering slope check valve in a working state, and the device comprises a water pumping pipe, a water injection pipe, a water pump, an air inflation and extraction pump and an air bag, the inlet end of the water pump is connected with the water pumping pipe, and the outlet end of the water pump is connected with the water injection pipe; the tail end of the water injection pipe is arranged in a water drainage pipe of the check valve, the air bag is arranged on the outer wall of the water injection pipe and located in the water drainage pipe, the air bag is connected with the output end of the air inflation and extraction pump, and the air bag can be inflated and expanded under the action of the air inflation and extraction pump. A gap between the outer wall of the water injection pipe and the inner wall of the water drainage pipe is blocked, and air is discharged under the action of an air inflation and suction pump, so that the air bag is separated from the inner wall of the water drainage pipe. The problem that the reliability of detecting the working state of the installed check valve is poor in the prior art can be solved.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering safety testing technology, and in particular to a performance testing device and method for a check valve on a water conservancy engineering slope under working conditions. Background Technology

[0002] Water conservancy projects such as canals and reservoirs typically involve excavated slopes or engineering slopes. The groundwater level on the slopes of these structures, particularly the surrounding rock and soil, is usually high during the flood season or after rainfall. This groundwater can seep into the canals, rivers, or reservoirs through the slopes. Canal and reservoir slope protection usually employs concrete lining structures. When the groundwater level in the slope's rock and soil is high, exceeding the critical value of the lining, it can cause the lining to buckle and crack, especially in areas with significant fluctuations in groundwater level. Therefore, one-way check valves are often installed on the surface layer of slopes in water conservancy projects such as canals and reservoirs. These valves discharge groundwater into the river or canal outside the slope, lowering the groundwater level and reducing the risk of lining buckling and damage. During the high-water season, when the water level in the canal or river rises to submerge the check valve, the water will not flow back into the slope protection layer or into the rock and soil.

[0003] Check valves installed on the slopes of water conservancy projects such as canals and reservoirs are generally exposed above the water surface during the dry season. Besides the potential for siltation inside, they are also frequently exposed to direct sunlight, which can easily cause valve failure, resulting in problems such as the valve being unable to open or seal. Check valves installed on canal and reservoir slopes are often connected to drainage pipes buried in the slope soil. This drainage pipe connects to the inlet end of the check valve, while the other end often extends to a collection well on the embankment of the water conservancy project. This collection well is used to collect surface and groundwater from the mountains or high slopes. When the water level in the collection well exceeds a certain height, the check valve opens, discharging the water into the canal or river.

[0004] Before the high-water season and rainy season arrive, it is necessary to test the working status of the check valves installed on the slopes of water conservancy projects. Check their performance, such as opening water pressure, drainage, and sealing, to prevent slope collapse, lining heave, and other slope instability caused by the failure of the check valves when the groundwater rises suddenly. In severe cases, this can lead to huge economic losses and even safety accidents such as casualties.

[0005] However, currently, the water conservancy industry lacks suitable methods for testing the performance of installed check valves. Repairs and replacements are often only carried out after accidents such as canal slope collapses or lining plate heaves occur, resulting in high costs and long cycles. Therefore, routine inspections of water conservancy projects are essential. Currently, inspections mainly involve manually opening the check valve's top cover to observe its opening and closing, and checking for blockages such as silt and debris. Judging the check valve's working status based on experience is unreliable and cannot provide early warning or quantitative assessment of check valve performance. Furthermore, existing technology cannot detect whether the check valve is within its reasonable opening range or whether the drainage volume meets design requirements. In practical applications, check valves are exposed to complex and variable outdoor environments, and their overall working status may deviate from the factory design parameters. Relying solely on maintenance personnel manually opening and closing the valve and judging its working status based on experience is prone to significant errors and lacks practical theoretical basis, easily leading to misjudgments. Summary of the Invention

[0006] The purpose of this invention is to provide a performance testing device and method for check valves on slopes in hydraulic engineering under working conditions, so as to solve the problem of poor reliability in testing the working conditions of installed check valves in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention provides a performance testing device for a check valve on a hydraulic engineering slope under working conditions, comprising a pumping pipe, an injection pipe, a water pump, an air pump, and an air bladder. The inlet end of the water pump is connected to the pumping pipe, and the outlet end of the water pump is connected to the injection pipe. The end of the injection pipe is disposed inside the drain pipe of the check valve. The air bladder is disposed on the outer wall of the injection pipe and located inside the drain pipe. The air bladder is connected to the output end of the air pump. The air bladder can be inflated under the action of the air pump to seal the gap between the outer wall of the injection pipe and the inner wall of the drain pipe, and can be deflated under the action of the air pump to separate the air bladder from the inner wall of the drain pipe.

[0008] Optionally, the water injection pipe includes a straight pipe section and an elbow. One end of the straight pipe section is connected to the outlet end of the water pump, and the other end of the straight pipe section is connected to the elbow. The elbow portion is located inside the drain pipe, and the straight pipe section is vertically arranged.

[0009] Optionally, the straight pipe section may be made of a transparent material.

[0010] Optionally, an overflow solenoid valve is connected to the straight pipe section to limit the water level in the injection pipe.

[0011] Optionally, there are at least two overflow solenoid valves, arranged from bottom to top on the straight pipe section.

[0012] Optionally, an electronic flow scale for measuring the outflow of water from the check valve may also be included.

[0013] Optionally, the system also includes a vehicle, on which the air pump and the water pump are mounted.

[0014] The present invention also provides a method for testing the performance of a check valve on a water conservancy project slope under working conditions using the above-mentioned device, comprising: transporting the performance testing device for the check valve on a water conservancy project slope to the slope embankment where the check valve to be tested is located; placing a pumping pipe into the water in the reservoir, extending a water injection pipe into the collection well, and placing a bend equipped with an air bladder into the drain pipe; starting an air pump to inflate the air bladder and seal the gap between the outer wall of the water injection pipe and the inner wall of the drain pipe; starting a water pump to pump water into the drain pipe, observing the opening status of the check valve under test, and recording the water level in the water injection pipe when the check valve under test is open.

[0015] Optionally, the water injection pipe of the performance testing device for the working state of the check valve on the slope of the water conservancy project includes a straight pipe section and an elbow. One end of the straight pipe section is connected to the outlet end of the water pump, and the other end of the straight pipe section is connected to the elbow. The elbow is located inside the drainage pipe. The straight pipe section is vertically arranged, and an overflow solenoid valve that limits the water level in the water injection pipe is connected to the pipe body of the straight pipe section. The performance testing device for the working state of the check valve on the slope of the water conservancy project also includes an electronic flow scale for measuring the outflow of the check valve. The water pump is started to pump water into the drainage pipe, and the opening status of the check valve under test is observed and the water level in the water injection pipe is recorded when the check valve under test is open. This includes: injecting water into the water injection pipe and opening the overflow solenoid valve, adjusting the pumping volume of the water pump to keep the water level in the water injection pipe at the height of the opened overflow solenoid valve; after the water level stabilizes, placing the electronic flow scale below the check valve under test; starting the timing, calculating and recording the drainage volume of the check valve under test per unit time.

[0016] Optionally, starting the water pump to pump water into the drain pipe, observing the opening status of the check valve under test and recording the water level in the injection pipe when the check valve under test is open also includes: changing the opening and closing status of the overflow solenoid valve at different heights and recording the drainage volume of the check valve under test under different water pressures; if the drainage volume under each water pressure is within the normal range, the test is qualified, and if the value is abnormal, maintenance is required.

[0017] The present invention provides a performance testing device and method for a check valve on a hydraulic engineering slope under working conditions, which has the following beneficial effects: By extending the water injection pipe and the air bladder connected to it through the water collection well into the drain pipe of the check valve being tested, and by inflating the air bladder, the gap between the outer wall of the water injection pipe and the inner wall of the drain pipe is sealed. This creates a sealed space within the water injection and drain pipes under the action of the check valve and the air bladder. After water is pumped into the water injection pipe, the opening pressure of the check valve and the drainage flow rate at different water levels can be detected by measuring the water flow height within the pipe. This allows for the testing of the check valve's performance during operation, such as testing its opening pressure and drainage capacity at different pressure values. The testing is accurate and reliable, enabling timely replacement or risk assessment and early warning.

[0018] The device integrates a water pumping pipe, a water injection pipe, a water pump, an air pump, and an airbag to create a system for simulating water pressure on-site.

[0019] First, the water injection pipe and the air bladder connected to it are inserted together through the water collection well into the drain pipe of the check valve being tested. The air bladder inflates, precisely sealing the gap between the outer wall of the water injection pipe and the inner wall of the drain pipe. This action, combined with the check valve and the air bladder, creates an independent and sealed pressure space within the water injection and drain pipes. When water is pumped into this sealed space, the opening pressure of the check valve can be directly and quantitatively detected by reading the height of the water column in the water injection pipe. By measuring the amount of water discharged per unit time, the drainage flow rate at different water levels can be calculated. This allows for accurate and reliable quantitative testing of the check valve's performance under operating conditions, such as opening pressure and drainage volume, without disassembling or damaging existing facilities. This provides precise data for timely replacement of failed valves or risk classification and early warning, solving the problems of existing technologies that rely solely on experience, resulting in large errors and low reliability.

[0020] Secondly, by using a transparent material (such as plexiglass) for the straight pipe sections, inspectors can directly, in real-time, and accurately read the water level inside the pipe without the need for any auxiliary tools. This design transforms abstract pressure values ​​into visual length values, greatly improving the convenience of inspection and the accuracy of data recording, and avoiding errors caused by estimating the water level.

[0021] Secondly, the overflow solenoid valve plays a crucial role in precisely controlling the water head. By opening the overflow solenoid valve at a specific height, excess water overflows from this valve port as the water pump continuously injects water, automatically stabilizing the water level in the injection pipe at the installation height of the solenoid valve. By setting the overflow solenoid valve at different heights (e.g., 1.0, 1.2, and 1.5 times the design opening pressure of the check valve), different operating head conditions can be simulated. Operators can quickly establish multiple stable test water pressures simply by switching the open and closed states of different solenoid valves, thereby systematically testing the drainage flow characteristics of the check valve under different water pressures. This not only improves testing efficiency but also ensures the accuracy and repeatability of each water pressure test, providing standardized pressure conditions for quantitative performance evaluation.

[0022] Then, by reading the weight or volume change per unit time, the instantaneous flow rate under that water pressure can be accurately calculated. This completely changes the traditional vague assessment method of "observing the size of the water flow with the naked eye," digitizes the key indicator of drainage capacity, and provides an objective and quantitative basis for judging whether there are problems such as blockage of the check valve or insufficient flow due to spring fatigue.

[0023] Secondly, the core power equipment (water pumps and air pumps) was integrated into the vehicle, creating a mobile inspection platform. The inspection routes for slope protection in water conservancy projects are long and the inspection points are scattered; the vehicle-mounted design greatly improves the mobility and relocation efficiency of the equipment. Inspection personnel no longer need to repeatedly carry heavy water pumps and air pumps; they can quickly reach each inspection point by driving the vehicle and carrying lighter water injection and extraction hoses, significantly reducing labor intensity and increasing inspection coverage.

[0024] Furthermore, this application can improve the safety level of water conservancy projects. It is characterized by strong operability, convenient testing, easy maintenance, and low maintenance cost. For the first time in the field of water conservancy projects, it realizes online and quantitative safety testing of check valves, filling a technological gap and demonstrating pioneering nature.

[0025] Furthermore, the device in this application transforms passive emergency response into proactive early warning, enabling early detection of whether the check valve's drainage and sealing performance has deteriorated, thus preventing minor issues from escalating into major disasters and fully ensuring the safety of water conservancy projects.

[0026] Finally, by using the device of this application, quantitative drainage data and risk levels can be obtained, enabling maintenance decisions for water conservancy projects to shift from "experience-based" to "data-driven," thus making decisions more scientific. The data obtained from the testing in this application can also be connected to a smart water conservancy platform to achieve full lifecycle health management of equipment, making management intelligent and in line with the direction of modern water conservancy development. Furthermore, when using the device and method of this application, the testing of check valves can be completed without disassembling them, resulting in a fast testing process, low cost, and good economic efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the performance testing device for the check valve of the slope in the water conservancy project under working conditions in an embodiment of the present invention, which tests the check valve in the section with the water collection well. Figure 2 This is a partial structural diagram of a performance testing device for a check valve on a slope in a hydraulic engineering project, used in an embodiment of the present invention, to test a check valve in a section with a water collection well. Figure 3 This is another partial structural schematic diagram of the performance testing device for the check valve of the slope in the water conservancy project in the embodiment of the present invention, which tests the check valve of the section with the water collection well.

[0028] Explanation of reference numerals in the attached figures: 110. Check valve; 120. Drainage pipe; 130. Slope; 140. Cut-off block; 150. Sump; 160. Pumping pipe; 170. Slope protection surface layer; 180. Water pump; 190. Vehicle; 200. Water injection pipe; 210. Air pump; 220. Air pipe; 230. Elbow; 240. Airbag; 250. Overflow solenoid valve; 260. Electronic flow scale; 270. Straight pipe section. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the overall structure of the performance testing device for the check valve on the slope of a water conservancy project in the working state, as described in this embodiment of the invention, for testing the check valve in section 150 with a water collection well. Figure 2 This is a partial structural diagram of a performance testing device for a check valve on a hydraulic engineering slope under working conditions, as described in an embodiment of the present invention, used to test a check valve in a section with a water collection well (section 150). Figure 3This is another partial structural diagram of the performance testing device for a check valve on a hydraulic engineering slope under working conditions, as described in this embodiment of the invention, for testing a check valve in a section with a collection well 150. This embodiment provides a performance testing device for a check valve on a hydraulic engineering slope under working conditions, including a pumping pipe 160, an injection pipe 200, a water pump 180, an air pump 210, and an air bag 240. The inlet end of the water pump 180 is connected to the pumping pipe 160, and the outlet end of the water pump 180 is connected to the injection pipe 200. The injection pipe 200... The end of the 00 is located inside the drain pipe 120 of the check valve 110. The airbag 240 is located on the outer wall of the water injection pipe 200 and inside the drain pipe 120. The airbag 240 is connected to the output end of the inflation pump 210. The airbag 240 can be inflated under the action of the inflation pump 210 to seal the gap between the outer wall of the water injection pipe 200 and the inner wall of the drain pipe 120, and can be deflated under the action of the inflation pump 210 to separate the airbag 240 from the inner wall of the drain pipe 120.

[0036] By extending the water injection pipe 200 and the air bladder 240 connected to it through the water collection well 150 into the drain pipe 120 of the check valve 110 being tested, and by inflating the air bladder 240, the gap between the outer wall of the water injection pipe 200 and the inner wall of the drain pipe 120 is precisely sealed. This action, combined with the action of the check valve 110 and the air bladder 240, creates an independent and sealed pressure space within the water injection pipe 200 and the drain pipe 120. When water is pumped into this sealed space by the water pump 180, the opening pressure of the check valve 110 can be directly and quantitatively detected by reading the height of the water column in the water injection pipe 200; by measuring the amount of water discharged per unit time, the drainage flow rate at different water levels can be calculated. This enables accurate and reliable quantitative testing of the performance of check valve 110 under its operating conditions, such as opening pressure and drainage volume, without disassembling or damaging existing facilities. It provides precise data for timely replacement of failed valves or risk classification and early warning, and solves the problem of large errors and low reliability when relying solely on experience in existing technologies.

[0037] In this embodiment, the performance of the check valve 110 under operating conditions refers to the drainage volume under the opening pressure and a specific pressure difference. By obtaining the opening pressure, if the opening pressure value is within the design range, it indicates that the check valve can open and close normally. By obtaining the drainage volume under different pressure differences, if the drainage volume under each water pressure is within the normal range, the check valve's drainage performance is considered qualified; otherwise, abnormal values ​​require maintenance.

[0038] Specifically, the water injection pipe 200 includes a straight pipe section 270 and an elbow 230. One end of the straight pipe section 270 is connected to the outlet end of the water pump 180, and the other end is connected to the elbow 230. The elbow 230 is partially located inside the drain pipe 120, and the straight pipe section 270 is vertically arranged. The elbow 230 allows the end of the water injection pipe 200 to smoothly change the direction of water flow, facilitating the transition from the vertical sump 150 to the horizontal drain pipe 120 and reducing installation difficulty. The vertically arranged straight pipe section 270 forms a natural "pressure measuring pipe." According to the principle of communicating vessels, the water level in the straight pipe section 270 is equal to the actual water pressure head in the drain pipe 120 (at the front end of the check valve 110). This provides a physical basis for directly determining the opening pressure by observing the water level, eliminating the need for an additional pressure sensor, resulting in a simple structure and intuitive readings.

[0039] Furthermore, the water injection pipe 200 also includes a connecting section, which, the straight pipe section 270, and the elbow 230 are connected in sequence. One end of the connecting section is connected to the outlet end of the water pump 180, and the other end of the connecting section is connected to one end of the straight pipe section 270. The introduction of the connecting section increases the flexibility of equipment layout. As a transition hose or rigid pipe between the outlet of the water pump 180 and the vertical straight pipe section 270, it allows the water pump 180 and upstream equipment to be placed on flat ground far from the sump 150, avoiding the problem of difficult equipment placement due to complex slope terrain or narrow sump 150, and improving the site adaptability of the device.

[0040] Preferably, the straight pipe section 270 is made of a transparent material, allowing observation of the water level and indicating at what water level the check valve 110 can open. Making the straight pipe section 270 transparent (such as plexiglass) allows inspectors to directly, in real-time, and accurately read the water level without any auxiliary tools. This design transforms abstract pressure values ​​into visual length values, greatly improving the convenience of inspection and the accuracy of data recording, and avoiding errors caused by estimating the water level.

[0041] Preferably, the straight pipe section 270 is marked with a scale to display the water level inside the pipe. This design greatly improves the convenience of detection and the accuracy of data recording, avoiding errors caused by estimating the water level.

[0042] The airbag 240 is connected to the inflation pump 210 via the air tube 220.

[0043] Preferably, an overflow solenoid valve 250 is connected to the straight pipe section 270 to limit the water level in the water injection pipe 200. The overflow solenoid valve 250 serves to precisely control the water head. By opening the overflow solenoid valve 250 at a certain height, when the water pump 180 continuously injects water, excess water will overflow from this valve port, thereby automatically stabilizing the water level in the water injection pipe 200 at the installation height of the solenoid valve. By setting the overflow solenoid valve 250 at different heights (e.g., corresponding to 1.0 times, 1.2 times, and 1.5 times the design opening pressure of the check valve 110), different working head conditions can be simulated. Operators only need to switch the opening and closing states of different solenoid valves to quickly establish multiple stable test water pressures, thereby systematically testing the drainage flow characteristics of the check valve 110 under different water pressures. This not only improves testing efficiency but also ensures the accuracy and repeatability of each test water pressure, providing standardized pressure conditions for performance quantitative evaluation.

[0044] Preferably, there are at least two overflow solenoid valves 250, arranged from bottom to top on the straight pipe section 270. (Reference) Figure 2 The overflow solenoid valve 250 is positioned at a height of 10cm, 20cm, and 50cm from the bottom of the water injection pipe 200 to measure the drainage volume of the check valve 110 under different water pressures.

[0045] Preferably, an electronic flow scale 260 is also included for measuring the water flow rate of the check valve 110. The electronic flow scale 260 enables precise measurement of the drainage volume. When the check valve 110 opens to drain water under a set water pressure, the discharged water falls directly into the container on the electronic flow scale 260. By reading the weight or volume change per unit time, the instantaneous flow rate under that water pressure can be accurately calculated. This completely changes the traditional vague assessment method of "observing the size of the water flow with the naked eye," digitizing the key indicator of drainage capacity, and providing an objective and quantitative basis for judging whether the check valve 110 is blocked, or whether spring fatigue is causing insufficient flow.

[0046] Preferably, the electronic flow scale 260 is located directly below the outlet of the check valve 110.

[0047] Preferably, the system also includes a vehicle 190, on which the air pump 210 and the water pump 180 are mounted. Integrating the core power equipment (water pump 180 and air pump 210) onto the vehicle 190 creates a mobile inspection platform. Since the inspection routes for slope protection in water conservancy projects are long and the inspection points are scattered, the vehicle-mounted design greatly improves the mobility and relocation efficiency of the equipment. Inspection personnel no longer need to repeatedly carry the heavy water pump 180 and air pump 210; they can quickly reach each inspection point by driving the vehicle 190 and carrying the lighter water injection pipe 200 and water extraction pipe 160, significantly reducing labor intensity and increasing inspection coverage.

[0048] Preferably, a one-way flap valve is installed at the inlet end of the pumping pipe 160 to prevent backflow of water within the pipe. The one-way flap valve is a simple check valve that only allows water to flow from the reservoir into the pumping pipe 160, while preventing reverse flow. During testing, if the water pump 180 unexpectedly stops, this flap valve will immediately close under gravity or water pressure, preventing water in the pumping pipe 160 and the water pump 180 from flowing back into the reservoir and avoiding the emptying of the pipeline. This ensures that the cumbersome priming and venting operations are not required when restarting the water pump 180, simplifying the operation process and improving the continuity of testing operations.

[0049] Figure 1 The slope protection surface layer 170 is generally a concrete layer, while the seepage intercepting pier 140 is located outside the channel or riverbank, and the outer side of the seepage intercepting pier 140 is a collection well 150. In this embodiment, water from the channel is pumped to the drainage pipe 120 connected to the check valve 110 by a pumping device such as a water pump 180. Under the action of an inflation device such as an airbag 240, water pressure with a certain water level is formed in the water injection pipe 200, thereby detecting whether the opening pressure value, drainage volume, and other performance of the check valve 110 installed on the slope 130 are within the qualified range. The test results can provide maintenance personnel with a basis for judging the working status of the check valve 110 and determine whether the check valve 110 needs to be repaired or replaced to achieve the designed operating state.

[0050] This embodiment also provides a method for testing the performance of a check valve on a slope in a hydraulic engineering project using the performance testing device described above, including: Step S100: Transport the performance testing device for the working state of the check valve on the slope of the water conservancy project to the slope embankment where the check valve 110 to be tested is located. Step S200: Put the pumping pipe 160 into the water in the reservoir, extend the water injection pipe 200 into the water collection well 150, and put the elbow 230 equipped with the airbag 240 into the drain pipe 120. Step S300: Start the inflation pump 210 to inflate the airbag 240 and seal the gap between the outer wall of the water injection pipe 200 and the inner wall of the drain pipe 120. Step S400: Start the water pump 180 and put the water pump 180 into the drain pipe 120. Observe the opening status of the test check valve 110 and record the water level in the drain pipe 120 when the test check valve 110 is opened. At this time, the pressure difference between the water level and the water level at the check valve 110 is the opening pressure value of the check valve 110 (1).

[0051] This clarifies the basic testing process from equipment placement, pipeline connection, airbag 240 sealing to water injection and observation of opening pressure, ensuring the operability and accuracy of opening pressure testing.

[0052] The performance testing device for the slope check valve in the working state of the water conservancy project includes a water injection pipe 200 comprising a straight pipe section 270 and an elbow 230. One end of the straight pipe section 270 is connected to the outlet end of the water pump 180, and the other end of the straight pipe section 270 is connected to the elbow 230. The elbow 230 is partially located inside the drainage pipe 120. The straight pipe section 270 is vertically arranged, and an overflow solenoid valve 250 is connected to the pipe body of the straight pipe section 270 to limit the water level in the water injection pipe 200. The performance testing device for the slope check valve in the working state of the water conservancy project also includes an electronic flow scale 260 for measuring the outflow of the check valve 110. The water pump 180 is started to pump water into the drainage pipe 120, and the opening status of the check valve 110 under test is observed and the water level in the drainage pipe 120 when the check valve 110 under test is opened is recorded. Step S410: Inject water into the water injection pipe 200 and open the overflow solenoid valve 250. Adjust the pumping volume of the water pump 180 to keep the water level in the water injection pipe 200 at the height of the opened overflow solenoid valve 250. Step S420: After the water level stabilizes, place an electronic flow scale below the check valve 110 being tested. Step S430: Start timing and calculate and record the drainage volume of the tested check valve 110 per unit time.

[0053] The operation steps of observing the water level using the transparent straight pipe section 270, stabilizing the water head using the overflow solenoid valve 250, and measuring the flow using the electronic flow scale 260 were clarified, thus realizing accurate detection of the discharge volume under constant water head conditions.

[0054] The process of starting water pump 180 to enter drain pipe 120, observing the opening status of the test check valve 110, and recording the water level in drain pipe 120 when the test check valve 110 is open also includes: Step S440: Change the opening and closing state of the overflow solenoid valve 250 at different heights, and detect and record the drainage volume of the test check valve 110 under different water pressures. Step S450: If the drainage volume under each water pressure is within the normal range, the test is considered qualified; if the value is abnormal, maintenance is required.

[0055] The procedure for detecting drainage volume under different water pressures by changing the overflow valve at different heights is described, and the judgment logic of "abnormal values ​​require maintenance" is given. This constitutes a detection method for the full-condition performance curve of check valve 110, providing complete data support for valve health assessment.

[0056] The method for testing the performance of the check valve 110 on the slope of a water conservancy project under working conditions further includes: step S500, shutting off the water pump 180, changing the direction of the air pump 210, extracting the gas in the air bag 240 to separate the air bag 240 from the inner wall of the drain pipe 120, and retracting the pumping pipe 160, the injection pipe 200 and the air bag 240 to the next check valve 110 to be tested.

[0057] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A performance testing device for a check valve on a hydraulic engineering slope under working conditions, characterized in that, It includes a water suction pipe, a water injection pipe, a water pump, an air inflation and suction pump, and an air bag. The inlet end of the water pump is connected to the water suction pipe, the outlet end of the water pump is connected to the water injection pipe, the end of the water injection pipe is arranged inside the drain pipe of the check valve, the air bag is arranged on the outer wall of the water injection pipe and is located inside the drain pipe, the air bag is connected to the output end of the air inflation and suction pump, and the air bag can be inflated and expanded under the action of the air inflation and suction pump to block the gap between the outer wall of the water injection pipe and the inner wall of the drain pipe, and deflate under the action of the air inflation and suction pump to separate the air bag from the inner wall of the drain pipe.

2. The performance testing device for the working state of the check valve on the slope of a hydraulic engineering project as described in claim 1, characterized in that, The water injection pipe includes a straight pipe section and an elbow. One end of the straight pipe section is connected to the outlet end of the water pump, the other end of the straight pipe section is connected to the elbow, the elbow is partially located inside the drain pipe, and the straight pipe section is arranged vertically.

3. The performance testing device for the working state of the check valve on the slope of a hydraulic engineering project as described in claim 2, characterized in that, The pipe body of the straight pipe section is made of a transparent material.

4. The performance testing device for the working state of the check valve on the slope of a hydraulic engineering project as described in claim 2 or 3, characterized in that, An overflow solenoid valve for limiting the water level height inside the water injection pipe is connected to the pipe body of the straight pipe section.

5. The performance testing device for the working state of the check valve on the slope of a hydraulic engineering project as described in claim 4, characterized in that, There are at least two overflow solenoid valves, which are arranged on the straight pipe section from bottom to top.

6. The performance testing device for the working state of the check valve on the slope of a hydraulic engineering project as described in claim 4, characterized in that, It further includes an electronic flow scale for measuring the water output of the check valve.

7. The performance testing device for the working state of the check valve on the slope of a hydraulic engineering project as described in claim 1, characterized in that, It further includes a vehicle, and the air inflation and suction pump and the water pump are placed on the vehicle.

8. A performance testing method for detecting the performance of a check valve on a slope in hydraulic engineering under working conditions using the device described in any one of claims 1-7, characterized in that, It includes: Transport the performance detection device of the check valve in the working state of the slope of the water conservancy project to the slope embankment where the check valve to be detected is located; Put the water suction pipe into the water of the canal reservoir, put the water injection pipe into the sump well, and put the elbow with the air bag into the drain pipe; Start the air inflation and suction pump to make the air bag expand to block the gap between the outer wall of the water injection pipe and the inner wall of the drain pipe; Start the water pump to pump water into the drain pipe, observe the opening condition of the measured check valve, and record the water level in the drain pipe when the measured check valve opens.

9. The performance testing method for the slope check valve in hydraulic engineering under working conditions as described in claim 8, characterized in that, The water injection pipe of the performance detection device of the check valve in the working state of the slope of the water conservancy project includes a straight pipe section and an elbow. One end of the straight pipe section is connected to the outlet end of the water pump, the other end of the straight pipe section is connected to the elbow, the elbow is partially located inside the drain pipe, the straight pipe section is arranged vertically, an overflow solenoid valve for limiting the water level height inside the water injection pipe is connected to the pipe body of the straight pipe section, the performance detection device of the check valve in the working state of the slope of the water conservancy project further includes an electronic flow scale for measuring the water output of the check valve, and starting the water pump to pump water into the drain pipe, observing the opening condition of the measured check valve, and recording the water level in the drain pipe when the measured check valve opens includes: Inject water into the water injection pipe, open the overflow solenoid valve, and adjust the water pumping volume of the water pump to keep the water level in the water injection pipe at the height of the opened overflow solenoid valve; After the water level is stable, place the electronic flow scale under the measured check valve; Start timing and calculate and record the drainage volume of the measured check valve per unit time.

10. The performance testing method for the slope check valve in hydraulic engineering under working conditions as described in claim 9, characterized in that, Starting the water pump to pump water into the drain pipe, observing the opening condition of the measured check valve, and recording the water level in the drain pipe when the measured check valve opens further includes: Change the opening and closing states of the overflow solenoid valves at different heights, detect and record the drainage volumes of the measured check valve under different water pressures; If the drainage volumes under each water pressure are within the normal range, the detection is qualified, and if the values are abnormal, maintenance is required.

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