Joint leakage detection device and method

Abstract

The application discloses a joint leakage detection device, and relates to the technical field of leakage detection.The device comprises a first clamping piece and a second clamping piece, the first clamping piece is provided with a first detection port and a second detection port in the form of an annular array and staggered distribution, the inside of the first clamping piece is provided with a leakage detection piece for leakage detection, the first clamping piece is further provided with a drainage assembly, and the inside of the first clamping piece is further provided with a hydraulic pressure detection piece for detecting hydraulic pressure changes.The present application identifies liquid infiltration patterns through staggered distribution of detection ports, combines hydraulic pressure change historical data and real-time signals, and intelligently distinguishes condensate water, persistent leakage and cumulative small leakage by a control unit, which not only actively eliminates interference through the drainage assembly, but also accurately judges and warns intermittent small leakage which is easily ignored, thereby effectively distinguishing intermittent small leakage from condensate water drops in a humid environment, and significantly improving the accuracy and reliability of hydraulic joint leakage detection in complex industrial environments.

Description

Technical Field

[0001] This invention relates to the field of leakage detection technology, and in particular to a joint leakage detection device and method. Background Technology

[0002] Hydraulic joints are essential components connecting various parts of a hydraulic system. Their sealing reliability directly affects the operational stability and safety of the entire system. In practical applications, hydraulic joints are prone to wear, loosening, or aging of seals at the connection points due to long-term exposure to alternating loads such as pressure pulsation, mechanical vibration, and temperature changes, which can lead to leakage. However, existing technologies still have significant shortcomings in real-time online monitoring of hydraulic joints and their ability to resist environmental interference.

[0003] Chinese Patent Application No. 2017213792559 discloses a ring-shaped leak detection sensor, comprising a ring-shaped clamp body that is securely locked onto a pipe requiring leak detection. The ring-shaped clamp body consists of two semi-circular clamp parts, one end of which is hinged together by a pin, and the other end of which is connected by a locking element. Each clamp part includes a clamp housing, within which a leak detection circuit for detecting leaks in the pipe is provided. A baffle is provided within the clamp housing, between the leak detection circuit and the outer circumference of the pipe, and multiple leak holes are distributed circumferentially on the baffle. This invention can accurately detect the location of pipe leaks, enabling maintenance personnel to perform timely repairs, saving resources and being environmentally friendly.

[0004] Chinese Patent Application No. 2024101472287 discloses a mining leakage detection device and method. The mining leakage detection device includes a detection cylinder with protruding rings fixedly connected to the inner walls on both sides. An elastic membrane is provided on the inner side of the two protruding rings. When leakage occurs at the joint of the pipe, the liquid enters the sealed cavity formed between the elastic membrane, the sealing ring and the outer surface of the pipe. At this time, the elastic membrane is subjected to pressure, which increases the pressure in the detection cavity. At this time, the pressure sensor detects the leakage of the pipe.

[0005] Similar to the existing technologies described above, although continuous leakage detection can be achieved through contact sensors, in the actual complex hydraulic operating environment, the pressure inside the pipeline is not constant. The start and stop of the pump, the adjustment of valves, and the changes in the consumption of downstream users can all cause periodic or random fluctuations in system pressure and flow, resulting in changes in the pressure at the pipeline joint. When the joint is under low pressure, the seal is good, but when the pressure rises above a certain critical value, the seal may undergo slight deformation, leading to media leakage. After the pressure drops, the leakage may stop or decrease, thus forming intermittent micro-leakage. Because the amount of leakage in a single instance is small and the leakage is not continuous, traditional sensors are difficult to detect this type of leakage.

[0006] Furthermore, because condensation often occurs on the outer wall of the pipe due to temperature differences in the environment, and intermittent minor leaks have small individual leakage amounts, and are affected by environmental factors, they will evaporate after accumulating for a certain period of time, resulting in increased humidity in the detection equipment area. Traditional detection equipment cannot distinguish the difference between the wetting pattern of condensation flowing along the pipe wall and the actual interface leak, which can easily lead to false alarms.

[0007] Given the aforementioned challenges, effectively distinguishing between intermittent minor leaks and environmental interference under complex operating conditions has become a core technological barrier in building highly reliable leak detection systems.

[0008] Therefore, it is necessary to invent a joint leakage detection device and method to solve the above problems. Summary of the Invention

[0009] The purpose of this invention is to provide a joint leakage detection device and method to solve the problems mentioned in the background art.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a joint leakage detection device, comprising a first clamping member and a second clamping member, wherein the first clamping member is provided with a first detection port and a second detection port arranged in a ring array and staggered, and a leakage detection element for leakage detection is provided inside the first clamping member; the first clamping member is also provided with a drainage component; and a hydraulic detection element for detecting hydraulic pressure changes is also provided inside the first clamping member.

[0011] The device also includes a control unit that is signal-connected to the leakage detection element and the hydraulic detection element. The control unit is configured to: when the leakage detection element detects a leakage signal through the first detection port and the second detection port, determine the leakage type based on whether the signal is triggered by a single or double detection port.

[0012] If only the trigger signal of the second detection port is detected, the theoretical total leakage amount is calculated based on the historical number of water pressure changes recorded by the hydraulic detection component and the current water pressure change event, according to the preset single micro leakage volume model. The presence of a cumulative micro leak in the pipeline is determined based on whether a leakage signal is detected this time.

[0013] Preferably, if the control unit detects that both the first detection port and the second detection port have triggered signals, it controls the drainage component to work and monitors whether a leakage signal reappears within a predetermined time after drainage, so as to confirm leakage and eliminate interference.

[0014] If only the trigger signal of the first detection port is detected, the control unit determines that it is condensation caused by a humid environment and controls the drainage component to perform drainage operations to eliminate the interference source.

[0015] Preferably, the first clamping member is further provided with an environmental monitoring component, and the control unit is further configured to receive environmental monitoring component and seasonal information to correct the influence of humidity interference on leakage judgment.

[0016] The control unit is configured to execute cumulative micro-leakage determination logic when only the second detection port triggers a leakage signal;

[0017] The cumulative micro-leakage detection logic includes:

[0018] Obtain the total number of water pressure changes that have occurred before the current leak signal is triggered, as recorded by the hydraulic detection device;

[0019] Based on the preset theoretical small leakage amount corresponding to a single water pressure change event, and combined with the total number of water pressure changes and the current water pressure change event, a theoretical cumulative leakage amount is calculated.

[0020] If a leakage signal is triggered again during this water pressure change event, it is determined that there is a cumulative minor leak in the pipeline;

[0021] If no leakage signal is triggered in this water pressure change event, it is determined that the pipeline has not leaked or the leakage amount has not reached the detection threshold in the current cycle.

[0022] Preferably, the leakage detection element comprises a sensor component capable of detecting changes in resistance or capacitance, the hydraulic detection element comprises a sensor component capable of detecting changes in ultrasonic waves or pipe vibration, a control component is provided on one side of the first clamping member, and the control unit is disposed within the control component.

[0023] Preferably, the drainage assembly includes a mounting groove, which is formed within a first clamping member. Two telescopic members are symmetrically arranged in each mounting groove. The fixed end of each telescopic member is connected to the side wall of the mounting groove, and the telescopic end of each telescopic member is connected to a sliding member. The area of ​​the first clamping member located on the sliding member is also provided with a sliding groove adapted to the sliding member.

[0024] Preferably, the hydraulic detection component is disposed on the side of the first clamping component that is in contact with the pipe wall, and multiple sets of the drainage components and multiple hydraulic detection components are alternately disposed. When the drainage component is not in the drainage state, the drainage component and the first clamping component together form a ring that is in contact with the side wall of the pipe.

[0025] Preferably, the first clamping member is further provided with a locking component, which can limit and unlock the first clamping member and the second clamping member, thereby realizing the installation and disassembly of the joint leakage detection device.

[0026] Preferably, the first clamping member has an inclined surface on one side where the first detection port and the second detection port are provided, and the second detection port is closer to the side wall of the pipe than the first detection port. The second clamping member has the same structure as the first clamping member, and the first clamping member and the second clamping member can be spliced ​​into a ring by locking components.

[0027] The present invention also provides a method for detecting joint leakage, the method utilizing the above-mentioned device to detect joint leakage, comprising the following steps:

[0028] S100. The hydraulic detection device monitors the water pressure changes in the pipeline in real time and records the time of each water pressure change; at the same time, the pipeline joint is detected online through the first and second detection ports of the leakage detection device.

[0029] S200. When the leakage detection device detects a leakage signal, the control unit determines whether the leakage information is triggered by both the first and second detection ports. If so, it controls the drainage component to work, drains the liquid in the detection area, and continues to detect leakage for a predetermined time after drainage. If a leakage signal is detected again within the predetermined time, it is determined that a substantial leakage has occurred in the pipeline. If no leakage signal is detected, it is determined that the leakage is caused by condensation interference or minor leakage due to environmental humidity.

[0030] If not, proceed to S300;

[0031] S300: The control unit determines whether the detection port of the trigger signal is the first detection port. If it is, it determines that the environment is humid. If not, it proceeds to S400.

[0032] S400. If the control unit determines that only the second detection port triggers the signal, it combines the historical number of water pressure changes recorded by the hydraulic detection component with the current water pressure change event, calculates the theoretical total leakage amount based on the preset single micro leakage volume model, and determines whether there is a cumulative micro leak in the pipeline based on whether a leakage signal is detected in this water pressure change event.

[0033] The S500 updates environmental humidity parameters in real time using seasonal information from environmental detection components or external input, correcting the impact of humidity interference on leak detection.

[0034] Preferably, S400 includes the following steps:

[0035] S410. Obtain the total number of water pressure changes that have occurred before the current leakage signal is triggered, as recorded by the hydraulic detection element.

[0036] S420. Calculate the current theoretical cumulative leakage amount based on the preset theoretical small leakage amount corresponding to a single water pressure change event;

[0037] S430. When the next water pressure change event occurs, if the leakage detection device detects a leakage signal, it is determined that there is a cumulative micro-leak in the pipeline, and the theoretical cumulative leakage amount has reached a preset threshold. When the next water pressure change event occurs, if the leakage detection device does not detect a leakage signal, it is determined that the pipeline has not leaked or the leakage amount has not reached the detection sensitivity threshold in the current detection cycle.

[0038] The technical effects and advantages of this invention are as follows:

[0039] This invention identifies liquid wetting patterns through staggered detection ports. Combining historical hydraulic change data with real-time signals, the control unit intelligently distinguishes between condensation, continuous leakage, and cumulative minor leakage. It can not only actively eliminate interference through drainage components, but also accurately judge and warn of easily overlooked intermittent minor leakage. This effectively distinguishes between intermittent minor leakage and condensation in humid environments, significantly improving the accuracy and reliability of hydraulic joint leakage detection in complex industrial environments. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0041] Figure 2 This is a schematic diagram of the structure of the present invention in the disconnected state.

[0042] Figure 3 This is a cross-sectional view of the drainage component area of ​​the present invention.

[0043] Figure 4 For the present invention Figure 3Schematic diagram of the mechanism at point A.

[0044] Figure 5 This is a schematic diagram of the drainage structure of the present invention.

[0045] Figure 6 This is a schematic diagram of the structure of the present invention in its undrained state.

[0046] Figure 7 This is a flowchart of the leakage detection method of the present invention.

[0047] Figure 8 This is a logic diagram for leak detection in this invention.

[0048] In the figure: 1. First clamping component; 11. First detection port; 12. Second detection port; 13. Leakage detection component; 14. Hydraulic detection component; 2. Second clamping component; 3. Drainage assembly; 31. Mounting groove; 32. Telescopic component; 33. Sliding component; 4. Locking assembly. Detailed Implementation

[0049] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] To overcome the significant shortcomings of existing technologies in real-time online monitoring of hydraulic joints and their ability to resist environmental interference.

[0051] like Figure 1 - Figure 8 As shown, a joint leakage detection device is disclosed in the first embodiment of the present invention, including a first clamping member 1 and a second clamping member 2. The first clamping member 1 is provided with a first detection port 11 and a second detection port 12 arranged in a ring array and staggered, and a leakage detection member 13 for leakage detection is provided inside it.

[0052] In this embodiment, the first clamping member 1 is further provided with a locking component 4, which can limit and unlock the first clamping member 1 and the second clamping member 2, thereby realizing the installation and disassembly of the connector leakage detection device.

[0053] It should be noted that the locking assembly 4 can lock and disassemble the first clamping member 1 and the second clamping member 2 through any structure that facilitates disassembly, installation and fixation, such as clamping or limiting members.

[0054] In this embodiment, the first clamping member 1 has a slanted surface on one side with a first detection port 11 and a second detection port 12, and the second detection port 12 is closer to the pipe sidewall than the first detection port 11. The second clamping member 2 has the same structure as the first clamping member 1, and the first clamping member 1 and the second clamping member 2 can be spliced ​​into a ring by locking assembly 4.

[0055] In this embodiment, the leakage detection element 13 includes a sensor component capable of detecting changes in resistance or capacitance, and the hydraulic detection element 14 includes a sensor component capable of detecting changes in ultrasonic waves or pipe vibration.

[0056] It should be noted that if the leakage detection component 13 is composed of a resistance sensor, the configuration is as follows: the sensor's detection circuit contains two closely arranged but insulated electrodes. In a dry state, the resistance between the two electrodes is very high or the conductivity is very low, and the circuit is in a "normal" state. When conductive liquid leaks and covers the two electrodes, the liquid acts as a conductive medium to form a current path, causing the resistance between the two electrodes to decrease sharply or the conductivity to increase significantly. The circuit detects this significant change in resistance or conductivity, thereby determining that "leakage has occurred" and triggering an alarm signal.

[0057] If the leakage detection element 13 uses a capacitive sensor, it is configured such that the sensor's detection circuit is equivalent to a capacitor, with its two electrodes separated by a dielectric layer, such as the sensor's plastic baffle or encapsulation material. The capacitance value is affected by the dielectric constant of the material above it. Since the dielectric constant of air is very low, about 1, when any liquid seeps into the sensor, because the dielectric constant of the liquid is much higher than that of air, it will cause a significant change in the capacitance value of the sensor's detection area. The circuit monitors this change in capacitance value, and when the change exceeds a set threshold, it is determined to be a leakage.

[0058] In use, the first clamping member 1 and the second clamping member 2 are fixed to the side wall of the hydraulic pipeline near the joint by the locking assembly 4. When leakage occurs at the joint of the hydraulic pipeline, the leaked fluid can move along the pipe wall into the device. Since the device and the pipeline are sealed, the fluid cannot pass through the device and continue to move downward. As the fluid increases, the water level in the device rises. When the fluid comes into contact with the first detection port 11 and the second detection port 12, it will trigger a change in the electrical signal. Based on the change in the electrical signal, an alarm message is issued to remind the operator that a leak has occurred.

[0059] However, in actual use, although the above-mentioned device can achieve continuous leakage detection, in the complex hydraulic operating environment, when the pressure rises above a certain critical value, the seal at the joint may undergo slight deformation, leading to media leakage. After the pressure drops, the leakage may stop or decrease, thus forming intermittent micro-leakage. Because this type of leakage has a small single leakage volume and is not continuous, and because the outer wall of the pipeline often produces condensate due to the ambient temperature difference, and the intermittent micro-leakage has a small single leakage volume, and is affected by environmental factors, it will evaporate after a certain period of time, resulting in increased humidity in the detection equipment area. Traditional detection equipment cannot distinguish the difference between the wetting pattern of condensate flowing along the pipe wall and the actual interface leakage, which easily leads to false alarms.

[0060] In another embodiment of the present invention, to solve the above problems, the device further includes: a drainage component 3 is provided on the first clamping member 1, a hydraulic detection component 14 for detecting hydraulic pressure changes is provided on the inner side of the first clamping member 1, and a control component 5 is provided on one side of the first clamping member 1, with the control unit disposed in the control component 5.

[0061] In this embodiment, the drainage component 3 includes a mounting groove 31, which is formed in the first clamping member 1. Two telescopic members 32 are symmetrically arranged in each mounting groove 31. The fixed end of each telescopic member 32 is connected to the side wall of the mounting groove 31, and the telescopic end of each telescopic member 32 is connected to the sliding member 33. The area of ​​the first clamping member 1 located in the sliding member 33 is also provided with a sliding groove adapted to the sliding member 33, and the sliding groove is connected to the mounting groove 31.

[0062] In this embodiment, the hydraulic detection component 14 is disposed on the side of the first clamping component 1 that is in contact with the pipe wall, and multiple sets of drainage components 3 and multiple hydraulic detection components 14 are disposed alternately. When the drainage component 3 is not in the drainage state, the drainage component 3 and the first clamping component 1 together form a ring that is in contact with the side wall of the pipe.

[0063] It should be noted that the hydraulic detection component 14 comprises sensors capable of detecting changes in ultrasonic waves or pipe vibrations. If the hydraulic detection component 14 uses ultrasonic time-of-flight detection, its configuration consists of a main unit, a probe, a scanning device, and a coupling agent. The main unit is the control core of the system, responsible for generating high-frequency electrical pulses to drive the probe and receiving, amplifying, and processing the returned ultrasonic signals. The probe typically uses a piezoelectric crystal to achieve the mutual conversion between electrical signals and ultrasonic energy. Its frequency and crystal size need to be selected according to the detection requirements. A pair of probes with consistent parameters are symmetrically arranged on both sides of the detection area. The basis of this method is to measure the time difference of ultrasonic wave propagation in the medium. The propagation speed of ultrasonic waves in the medium is known or calibrable. By accurately calculating the time interval between the transmitted and received waves, the distance of sound wave propagation can be determined. After accurately measuring the average flow velocity of the fluid using the ultrasonic time-of-flight method, combined with parameters such as pipe size and fluid density, the pressure difference between two specific points is calculated using fluid dynamics formulas such as Bernoulli's equation.

[0064] If the hydraulic detection component 14 is used to detect changes in pipeline vibration, it is configured as a pressure sensor. Its principle is that when a leak suddenly starts or stops, the momentum of the fluid in the pipeline changes abruptly, which will generate a pressure disturbance at the leak point, similar to the water hammer effect. This disturbance will propagate upstream and downstream in the fluid in the pipeline at the speed of sound, forming a pressure wave. The pressure wave acts on the pipe wall and will excite the pipeline to produce a brief, impact vibration. By detecting the changes in the vibration of the pipeline, it can be determined whether the water pressure has changed at this time.

[0065] In this embodiment, the device further includes a control unit that is signal-connected to the leakage detection element 13 and the hydraulic detection element 14. The control unit is configured to determine the leakage type based on whether the leakage signal is triggered by a single or double detection port when the leakage detection element 13 detects a leakage signal through the first detection port 11 and the second detection port 12.

[0066] In this embodiment, if only the trigger signal of the second detection port 12 is detected, the theoretical total leakage amount is calculated based on the historical number of water pressure changes recorded by the hydraulic detection component 14 and the current water pressure change event, according to the preset single micro leakage volume model. The presence of a cumulative micro leak in the pipeline is determined based on whether a leakage signal is detected this time.

[0067] In this embodiment, if the control unit detects that both the first detection port 11 and the second detection port 12 have triggered signals, it controls the drainage component 3 to work and monitors whether a leakage signal reappears within a predetermined time after drainage, so as to confirm leakage and eliminate interference.

[0068] If only the trigger signal of the first detection port 11 is detected, the control unit determines that it is condensation caused by a humid environment and controls the drainage component 3 to perform drainage operations to eliminate the source of interference.

[0069] In this embodiment, the first clamping member 1 is also provided with an environmental detection component, and the control unit is also configured to receive environmental monitoring component and seasonal information to correct the influence of humidity interference on leakage judgment. The control unit is configured to execute cumulative micro-leakage judgment logic when only the second detection port 12 triggers the leakage signal.

[0070] In this embodiment, the cumulative micro-leakage determination logic includes:

[0071] Obtain the total number of water pressure changes that have occurred before the current leak signal is triggered, as recorded by the hydraulic detection element 14.

[0072] Based on the preset theoretical small leakage volume corresponding to a single water pressure change event, and combined with the total number of water pressure changes and the current water pressure change event, a theoretical cumulative leakage volume is calculated.

[0073] If a leakage signal is triggered again during this water pressure change event, it is determined that there is a cumulative minor leak in the pipeline.

[0074] If no leakage signal is triggered in this water pressure change event, it is determined that the pipeline has not leaked or the leakage amount has not reached the detection threshold in the current cycle.

[0075] During use, if there is a liquid leak at the pipe joint, the leaked liquid will flow along the pipe wall into the inner cavity of the device. As the liquid level rises, the liquid will sequentially contact the second detection port 12, which is closer to the pipe wall, and the first detection port 11, which is slightly higher. The leak detection element 13 will detect the electrical signal and trigger the signal. At the same time, the hydraulic detection element 14 will monitor the pipe wall vibration signal caused by the pressure fluctuation in the pipe in real time and record these water pressure change events. After receiving the signals from the leak detection element 13 and the hydraulic detection element 14, the control unit will execute the built-in logic algorithm to determine the type of leak and trigger the corresponding action.

[0076] Its core judgment logic and process are as follows:

[0077] If the control unit only detects a trigger signal at the first detection port 11, while the second detection port 12, which is closer to the pipe wall, is not triggered, this indicates that liquid is flowing into the device directly from the external environment, such as condensate, through contact with the first detection port 11, rather than leaking outwards from the pipe interface. In this case, the control unit determines that the interference is caused by condensate due to a humid environment. To eliminate false alarms, the control unit will activate the drainage assembly 3. The telescopic member 32 pushes the sliding member 33 to extend along the groove, draining the liquid accumulated inside the device. After drainage is completed, the sliding member 33 retracts, restoring the sealing state.

[0078] If the control unit detects that both the first detection port 11 and the second detection port 12 have triggered signals simultaneously, this indicates that the leakage is large and the liquid level has risen rapidly, which is a typical characteristic of a continuous leak. While issuing a leak alarm, the control unit will immediately control the drainage component 3 to work and drain the liquid in preparation for secondary verification. Within a predetermined time after drainage, the control unit will monitor whether the leak signal reappears. If the signal is triggered again, it confirms that there is a continuous leak; if it is not triggered again, it helps to determine whether the leak is caused by temporary factors.

[0079] This logic will be activated when the control unit detects only the trigger signal of the second detection port 12, indicating a small amount of liquid seepage, while the first detection port 11 is not triggered:

[0080] The control unit acquires the total number of water pressure changes that have occurred before the current leak signal is triggered, as recorded by the hydraulic detection element 14.

[0081] Subsequently, based on the theoretical small leakage volume corresponding to a single water pressure change event, and combined with the total number of water pressure changes and the current water pressure change event, a theoretical cumulative leakage volume is calculated.

[0082] Finally, if a leakage signal is triggered again during this water pressure change event, it is determined that there is a cumulative minor leak in the pipeline; if it is not triggered, it is determined that no leak has occurred in the current cycle or the leakage amount has not reached the detection threshold.

[0083] It is worth noting that the device identifies liquid wetting patterns through staggered detection ports. Combined with historical hydraulic change data and real-time signals, the control unit intelligently distinguishes between condensate, continuous leakage, and cumulative minor leakage. It can not only actively eliminate interference through the drainage component 3, but also accurately judge and warn of intermittent minor leakage that is easily overlooked, significantly improving the accuracy and reliability of hydraulic joint leakage detection in complex industrial environments.

[0084] In another embodiment of the present invention, a method for detecting leakage at a joint is also included. This method utilizes the aforementioned joint leakage detection device to detect leakage, and includes the following steps:

[0085] S100. The hydraulic detection element 14 monitors the water pressure changes in the pipeline in real time and records the time of each water pressure change; at the same time, the pipeline joint is detected online through the first detection port 11 and the second detection port 12 of the leakage detection element 13.

[0086] S200: When the leak detection element 13 detects a leak signal, the control unit determines whether the leak information is triggered by both the first detection port 11 and the second detection port 12. If so, it controls the drainage component 3 to work, drains the liquid in the detection area, and continues to detect leaks for a predetermined time after drainage. If a leak signal is detected again within the predetermined time, it is determined that a substantial leak has occurred in the pipeline. If no leak signal is detected, it is determined that the leak is caused by condensation interference or minor leakage due to environmental humidity. If not, it proceeds to S300.

[0087] S300: The control unit determines whether the detection port of the trigger signal is the first detection port 11. If so, it determines that the environment is humid. If not, it proceeds to S400.

[0088] S400, if the control unit determines that only the second detection port 12 triggers the signal, then, based on the historical number of water pressure changes recorded by the hydraulic detection component 14 and the current water pressure change event, it calculates the theoretical total leakage amount based on the preset single micro leakage volume model, and determines whether there is a cumulative micro leak in the pipeline based on whether a leakage signal is detected in this water pressure change event.

[0089] In this embodiment, S400 includes the following steps:

[0090] S410: Obtain the total number of water pressure changes that have occurred before the current leak signal is triggered, as recorded by the hydraulic detection element 14.

[0091] S420. Based on the preset theoretical small leakage volume corresponding to a single water pressure change event, calculate the current theoretical cumulative leakage volume.

[0092] S430. When the next water pressure change event occurs, if the leakage detection element 13 detects a leakage signal, it is determined that there is a cumulative micro-leak in the pipeline, and the theoretical cumulative leakage amount has reached the preset threshold. When the next water pressure change event occurs, if the leakage detection element 13 does not detect a leakage signal, it is determined that the pipeline has not leaked in the current detection cycle or the leakage amount has not reached the detection sensitivity threshold.

[0093] It should be noted that if the leak detection component 13 detects a leak signal when the next water pressure event occurs, and the ambient humidity reaches the standard for condensation, the water will be drained through the drainage component 3, and the area will be marked. If the humidity is within the standard when the leak is detected again, and a leak signal is detected, it will be judged as a leak. If the humidity is still within the standard and a water pressure change is detected, and a leak signal is detected at the same time, maintenance personnel will be notified to inspect the area to determine whether a leak has occurred.

[0094] The S500 updates environmental humidity parameters in real time using seasonal information from environmental detection components or external input, correcting the impact of humidity interference on leak detection.

[0095] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A joint leakage detection device, comprising a first clamping member (1) and a second clamping member (2), characterized in that, The first clamping member (1) is provided with a first detection port (11) and a second detection port (12) arranged in a ring array and staggered layer. Inside it is a leakage detection component (13) for leakage detection. The first clamping member (1) is also provided with a drainage component (3). Inside the first clamping member (1) is a hydraulic detection component (14) for detecting hydraulic pressure changes. The first clamping member (1) has a first detection port (11) and a second detection port (12) on one side, which is inclined. The second detection port (12) is closer to the pipe side wall than the first detection port (11). The second clamping member (2) has the same structure as the first clamping member (1). The first clamping member (1) and the second clamping member (2) can be connected end to end to form a ring through the locking assembly. The device also includes a control unit that is signal-connected to the leakage detection element (13) and the hydraulic detection element (14). The control unit is configured to: when the leakage detection element (13) detects a leakage signal through the first detection port (11) and the second detection port (12), determine the leakage type based on whether the signal is triggered by a single or double detection port. If only the trigger signal of the second detection port (12) is detected, the historical water pressure change count recorded by the hydraulic detection component (14) and the current water pressure change event are combined, and the theoretical total leakage amount is calculated based on the preset single micro leakage volume model. The presence of a cumulative micro leakage in the pipeline is determined based on whether a leakage signal is detected this time. If the control unit detects that both the first detection port (11) and the second detection port (12) have triggered signals, it controls the drainage component (3) to work and monitors whether a leakage signal reappears within a predetermined time after drainage, so as to confirm leakage and eliminate interference. If only the trigger signal of the first detection port (11) is detected, the control unit determines that it is condensation caused by a humid environment and controls the drainage component (3) to perform drainage operations to eliminate the source of interference.

2. The joint leakage detection device according to claim 1, characterized in that, The first clamping member (1) is also provided with an environmental monitoring component. A control component (5) is provided on one side of the first clamping member (1). The control unit is located in the control component (5). The control unit is also configured to receive environmental monitoring components and seasonal information to correct the influence of humidity interference on the leakage judgment. The control unit is configured to execute cumulative micro-leakage determination logic when only the second detection port (12) triggers a leakage signal.

3. The joint leakage detection device according to claim 2, characterized in that, The cumulative micro-leakage detection logic includes: Obtain the total number of water pressure changes that have occurred before the current leak signal is triggered, as recorded by the hydraulic detection element (14); Based on the preset theoretical small leakage amount corresponding to a single water pressure change event, and combined with the total number of water pressure changes and the current water pressure change event, a theoretical cumulative leakage amount is calculated. If a leakage signal is triggered again during this water pressure change event, it is determined that there is a cumulative minor leak in the pipeline; If no leakage signal is triggered in this water pressure change event, it is determined that the pipeline has not leaked or the leakage amount has not reached the detection threshold in the current cycle.

4. The joint leakage detection device according to claim 1, characterized in that, The drainage component (3) includes a mounting groove (31), which is opened in the first clamping member (1). Two telescopic members (32) are symmetrically arranged in each mounting groove (31). The fixed end of each telescopic member (32) is connected to the side wall of the mounting groove (31), and the telescopic end of each telescopic member (32) is connected to the sliding member (33). The area of ​​the first clamping member (1) located in the sliding member (33) is also provided with a sliding groove that is adapted to the sliding member (33).

5. The joint leakage detection device according to claim 1, characterized in that, The hydraulic detection component (14) is located on the side of the first clamping component (1) that is in contact with the pipe wall. Multiple sets of drainage components (3) and multiple hydraulic detection components (14) are alternately arranged. When the drainage component (3) is not in the drainage state, the drainage component (3) and the first clamping component (1) together form a ring that is in contact with the side wall of the pipe.

6. The joint leakage detection device according to claim 1, characterized in that, The first clamping member (1) is also provided with a locking component (4), which can limit and unlock the first clamping member (1) and the second clamping member (2), thereby realizing the installation and disassembly of the joint leakage detection device.

7. The joint leakage detection device according to claim 1, characterized in that, The first clamping member (1) has a first detection port (11) and a second detection port (12) on one side, which is inclined. The second detection port (12) is closer to the pipe side wall than the first detection port (11). The second clamping member (2) has the same structure as the first clamping member (1). The first clamping member (1) and the second clamping member (2) can be connected end to end to form a ring by locking assembly (4).

8. A method for detecting leakage at a joint, wherein the method utilizes the joint leakage detection device according to any one of claims 1-7 to achieve leakage detection, characterized in that, Includes the following steps: S100. The hydraulic detection component (14) monitors the water pressure change in the pipeline in real time and records the time of each water pressure change; at the same time, the pipeline joint is detected online through the first detection port (11) and the second detection port (12) of the leakage detection component (13); S200. When the leakage detection device (13) detects a leakage signal, the control unit determines whether the leakage information is triggered by both the first detection port (11) and the second detection port (12). If so, the control unit controls the drainage component (3) to work, drain the liquid in the detection area, and continue to detect leakage within a predetermined time after drainage. If a leakage signal is detected again within the predetermined time, it is determined that a substantial leakage has occurred in the pipeline. If no leakage signal is detected, it is determined that the leakage is caused by condensation interference or minor leakage due to the humid environment. If not, proceed to S300; S300: The control unit determines whether the detection port of the trigger signal is the first detection port (11). If it is, it determines that the environment is humid. If not, it proceeds to S400. S400. The control unit determines that only the second detection port (12) triggers the signal. Then, based on the historical number of water pressure changes recorded by the hydraulic detection component (14) and the current water pressure change event, the theoretical total leakage is calculated cumulatively based on the preset single micro leakage volume model. The presence of a cumulative micro leak in the pipeline is determined based on whether a leakage signal is detected in this water pressure change event. The S500 updates environmental humidity parameters in real time using seasonal information from environmental detection components or external input, correcting the impact of humidity interference on leak detection.

9. The method for detecting leakage at a joint according to claim 8, characterized in that, The S400 includes the following steps: S410. Obtain the total number of water pressure changes that have occurred before the current leak signal is triggered, as recorded by the hydraulic detection element (14). S420. Calculate the current theoretical cumulative leakage amount based on the preset theoretical small leakage amount corresponding to a single water pressure change event; S430. When the next water pressure change event occurs, if the leakage detection device detects a leakage signal, it is determined that there is a cumulative micro-leak in the pipeline, and the theoretical cumulative leakage amount has reached a preset threshold. When the next water pressure change event occurs, if the leakage detection device does not detect a leakage signal, it is determined that the pipeline has not leaked or the leakage amount has not reached the detection sensitivity threshold in the current detection cycle.

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