Hydropower station gas pipeline pressure leakage detection device and method

Abstract

The invention discloses a hydropower station gas pipeline pressure-resistant leakage detection device and method. The hydropower station gas pipeline pressure-resistant leakage detection device comprises a handheld rod, a profiling part, a controller and a sound collector. The profiling piece is rotatably arranged at the top end of the handheld rod, an arc-shaped part used for being matched with the surface of the air pipeline is arranged on the profiling piece, and the sound collector is arranged on the arc-shaped part; the controller is arranged at the handheld end of the handheld rod, connected with the sound collector and used for analyzing the sound signals collected by the sound collector. The device is mainly composed of the handheld rod, the profiling piece, the controller and the sound collector, and by means of the length compensation effect of the handheld rod, the attaching effect of the arc-shaped part of the profiling piece and the flexible rotation change of the profiling piece, the device can be suitable for gas pipeline detection in a high place or a narrow space; the sound on the surface of the gas pipeline is acquired by the sound collector and analyzed by the controller, so that the pressure-resistant leakage condition of the gas pipeline is accurately identified, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure gas pipelines, and particularly relates to a pressure-resistant leakage detection device and method for a gas pipeline in a hydropower station. Background Art

[0002] When conducting a pressure-resistant test on a pressure gas pipeline in a hydropower station, testers need to observe pressure leakage after the pipeline is pressurized. Currently, the method used for pressure leakage observation is to listen to the sound manually, that is, the tester listens to the sound of each section of the pressure-resistant test pipeline one by one, and judges whether there is a pressure gas leakage point by listening to the sound.

[0003] However, the hydropower station units are often in an operating state; there is a certain amount of noise during the operation of the units and equipment. When using the manual sound listening method for leakage detection, it will be interfered by the noise, resulting in an inability to accurately judge whether there is a leakage. Moreover, some pipe sections of the pressure gas pipeline are located at high places or in narrow spaces. When using manual sound listening for detection, it is difficult to approach some of the pipe sections, resulting in weak sounds that cannot be clearly heard. If a ladder or an aerial work vehicle is used for high-altitude work, only a small part of the pipeline can be detected at a time, and it is necessary to move multiple times and climb up and down the ladder or the vehicle to detect the entire section. The operation efficiency is low and there are safety risks. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to provide a pressure-resistant leakage detection device and method for a gas pipeline in a hydropower station, which can accurately identify the pressure-resistant leakage condition of the gas pipeline, is applicable to high places or narrow spaces, is easy to operate, and improves the operation efficiency.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A pressure-resistant leakage detection device for a gas pipeline in a hydropower station, comprising a handheld rod, a profiling member, a controller, and a sound collector; The profiling member is rotatably arranged at the top of the handheld rod, and an arc portion for adapting to the surface of the gas pipeline is provided on the profiling member, and the sound collector is arranged on the arc portion; The controller is arranged at the handheld end of the handheld rod, the controller is connected to the sound collector, and the controller is used for analyzing the sound signal collected by the sound collector.

[0006] In order to solve the above technical problems, another technical solution adopted by the present invention is: A pressure-resistant leakage detection method for a gas pipeline in a hydropower station, which is applied to the above pressure-resistant leakage detection device for a gas pipeline in a hydropower station, and comprises the following steps: S1. Adjust the position of the profiling member according to the distribution of the gas pipeline; S2. Control the arc portion of the profiling member to be close to the gas pipeline and move along the pipeline direction of the gas pipeline, and at the same time start the sound collector; S3. Obtain the real-time sound signal collected by the sound collector through the controller, and determine whether the real-time sound signal contains the same sound as the preset leakage signal. If so, issue a leakage risk warning.

[0007] The beneficial effects of the present invention are as follows: A pressure-resistant leakage detection device and method for a gas pipeline in a hydropower station are provided, mainly composed of a handheld rod, a profiling part, a controller, and a sound collector. Relying on the length compensation effect of the handheld rod, the close fitting effect of the arc part of the profiling part, and the flexible rotation change of the profiling part, the device can be applied to the detection of gas pipelines in high places or narrow spaces. The sound collector obtains the sound on the surface of the gas pipeline and the controller analyzes it, so as to accurately identify the pressure-resistant leakage condition of the gas pipeline and improve the operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic structural diagram of a pressure-resistant leakage detection device for a gas pipeline in a hydropower station according to the present invention; Figure 2 is a schematic connection diagram among the profiling part, the steering knuckle, and the handheld rod of a pressure-resistant leakage detection device for a gas pipeline in a hydropower station according to the present invention; Figure 3 is a schematic step diagram of a pressure-resistant leakage detection method for a gas pipeline in a hydropower station according to the present invention.

[0009] Reference numeral description: 1. Handheld rod; 2. Profiling part; 3. Controller; 4. Sound collector; 5. Arc part; 6. Roller assembly; 7. Steering knuckle; 8. Damping hinge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0010] To describe the technical content, the achieved objectives, and the effects of the present invention in detail, the following is described in conjunction with the embodiments and with reference to the drawings.

[0011] Please refer to Figure 1 and Figure 2 , a pressure-resistant leakage detection device for a gas pipeline in a hydropower station, includes a handheld rod 1, a profiling part 2, a controller 3, and a sound collector 4; The profiling part 2 is rotatably arranged at the top end of the handheld rod 1, an arc part 5 for adapting to the surface of the gas pipeline is provided on the profiling part 2, and the sound collector 4 is arranged on the arc part 5; The controller 3 is arranged at the handheld end of the handheld rod 1, the controller 3 is connected to the sound collector 4, and the controller 3 is used to analyze the sound signal collected by the sound collector 4. From the above description, it can be seen that the beneficial effects of the present invention are: the device is mainly composed of a hand-held rod 1, a profiling member 2, a controller 3 and a sound collector 4. Relying on the length compensation effect of the hand-held rod 1, the close effect of the arc portion 5 of the profiling member 2 and the flexible rotation change of the profiling member 2, the device can be suitable for air pipeline detection in high places or narrow spaces. The sound on the surface of the air pipeline is acquired by the sound collector 4 and analyzed by the controller 3, so as to accurately identify the pressure leakage condition of the air pipeline and improve the working efficiency.

[0012] Furthermore, it also includes a roller assembly 6; At least two of the roller assemblies 6 are distributed on the inner arc surface of the arc-shaped portion 5 , and the contoured member 2 can move on the surface of the air pipe through the roller assemblies 6 .

[0013] From the above description, it can be seen that a roller assembly 6 is provided on the arc portion 5 of the profiling member 2, so that the entire profiling member 2 can roll on the surface of the airway, which not only ensures that the distance between the sound collector 4 and the airway is close enough, but also facilitates the detection of different positions of the airway, and the operation is convenient and labor-saving.

[0014] Further, it also includes a steering knuckle 7; One end of the steering knuckle 7 is rotatably disposed on the top end of the hand-held rod 1 , and the contoured member 2 is rotatably disposed on the other end of the steering knuckle 7 .

[0015] From the above description, it can be seen that a transfer joint is set at the top of the hand-held rod 1; the hand-held rod 1 and the steering knuckle 7 and the steering knuckle 7 and the contoured member 2 are all relatively rotatable, so that the device has multi-point flexible steering to cope with many complex or narrow spaces in the hydropower station, reducing the difficulty of manual operation.

[0016] Furthermore, there are at least two profiling members 2; A damping hinge 8 is provided on one end of the steering knuckle 7 away from the hand-held rod 1 , and all the contoured parts 2 are connected via the damping hinge 8 .

[0017] It can be seen from the above description that at least two contour members 2 are connected on the steering knuckle 7 via a damping hinge 8, so that the relative position of each contour member 2 can be flexibly adjusted to flexibly meet actual detection requirements.

[0018] Furthermore, it also includes an image collector and a locator; The image collector and the locator are arranged on the profiling member 2, a display screen is arranged on the controller 3, and the controller 3 is electrically connected to the image collector and the locator.

[0019] As can be seen from the above description, an image collector and a locator are provided on the device. When a sound identical to the sound of the air pipeline pressure resistance leakage is detected, the air pipeline image collected by the image collector at this time is obtained, and combined with the positioning information of the locator, the leakage position is accurately located, so as to facilitate subsequent air pipeline maintenance or re-inspection operations.

[0020] Furthermore, it further includes a speaker; The speaker is arranged on the handheld rod 1, and the controller 3 is electrically connected to the speaker.

[0021] As can be seen from the above description, by setting the speaker and playing the collected sound on the speaker while the sound collector 4 collects the signal, it is convenient for the operator to listen to the sound by himself to judge whether there is air pipeline pressure resistance leakage.

[0022] Furthermore, the length of the handheld rod 1 is adjustable.

[0023] As can be seen from the above description, by adjusting the length of the handheld rod 1, the leakage detection operation of pipelines at different heights or depths can be dealt with, avoiding the need for operators to work at heights.

[0024] Please refer to Figure 3 , a method for detecting the pressure resistance leakage of the air pipeline of a hydropower station, which is applied to the above-mentioned device for detecting the pressure resistance leakage of the air pipeline of a hydropower station, and includes the following steps: S1. Adjust the position of the profiling part 2 according to the distribution of the air pipeline; S2. Control the arc part 5 of the profiling part 2 to be close to the air pipeline and move along the pipeline direction of the air pipeline, and at the same time start the sound collector 4; S3. Obtain the real-time sound signal collected by the sound collector 4 through the controller 3, and judge whether the real-time sound signal contains a sound identical to the preset leakage signal. If so, issue a leakage risk warning.

[0025] As can be seen from the above description, the beneficial effects of the present invention are as follows: relying on the length compensation effect of the handheld rod 1, the close effect of the arc part 5 of the profiling part 2, and the flexible rotation change of the profiling part 2, the device can be applied to the detection of air pipelines in high places or narrow spaces. The sound collector 4 obtains the sound on the surface of the air pipeline and is analyzed by the controller 3, so as to accurately identify the pressure resistance leakage condition of the air pipeline and improve the operation efficiency.

[0026] Furthermore, in step S3, it further includes: When a sound identical to the preset leakage signal appears in the real-time sound signal, stop the movement of the profiling part 2, obtain the pipeline image information of the image collector and the current positioning information of the locator, and integrate the pipeline image information and the current positioning information to obtain the leakage position information.

[0027] As can be seen from the above description, an image collector and a locator are provided on the device. When a sound identical to the sound of the air pipe pressure resistance leakage is detected, the pipeline image collected by the image collector at this time is obtained, and combined with the positioning information of the locator, the air leakage position is accurately located, so as to facilitate subsequent air pipe maintenance or re-inspection operations.

[0028] Further, after obtaining the real-time sound signal collected by the sound collector 4 through the controller 3, the following steps are also included: Controlling the speaker to play the real-time sound signal.

[0029] As can be seen from the above description, a speaker is provided, and while the sound collector 4 collects signals, the collected sound is played on the speaker, which is convenient for the operator to listen to the sound by himself to judge whether there is air pipe pressure resistance leakage.

[0030] Please refer to Figure 1 and Figure 2 , the first embodiment of the present invention is: A device for detecting air pipe pressure resistance leakage in a hydropower station, including a hand-held rod 1, a profiling member 2, a controller 3 and a sound collector 4; the profiling member 2 is rotatably arranged at the top end of the hand-held rod 1, and an arc portion 5 for adapting to the surface of the air pipe is provided on the profiling member 2, and the sound collector 4 is arranged on the arc portion 5; the controller 3 is arranged at the hand-held end of the hand-held rod 1, the controller 3 is connected to the sound collector 4, and the controller 3 is used for analyzing the sound signal collected by the sound collector 4.

[0031] In this embodiment, the controller 3 is equipped with a sound wave analyzer, which is used to receive and analyze the sound wave signals collected by the sound image collecting device, filter the collected signals, extract high-frequency signals, and display the frequency spectrum and peak value through the display. When processing the sound signal, the on-site environmental noise is mainly filtered to reduce interference. And, the hand-held rod 1 adopts a telescopic rod with adjustable length, and a wire routing channel is arranged inside it to facilitate the connection of electrical components such as the controller 3 and the sound collector 4.

[0032] In this embodiment, at least two roller assemblies 6 are distributed on the inner arc surface of the arc portion 5 of the profiling member 2; thus, the profiling claw can travel on the surface of the air pipe with the help of the roller assemblies 6; and, since the thicknesses of the air pipes at different positions are different, the radian of the arc portion 5 of the profiling member 2 is adjusted within a certain range to ensure that the fit between the device and the air pipe is good enough.

[0033] Such as Figure 2As shown, the device is also equipped with a knuckle 7; one end of the knuckle 7 is rotatably arranged at the top of the hand-held rod 1, and the profiling member 2 is rotatably arranged at the other end of the knuckle 7. Specifically, a spherical portion is provided at one end of the knuckle 7, and a limiting groove adapted thereto is provided at the top of the hand-held rod 1. The spherical portion is rotatably arranged in the limiting groove to achieve flexible adjustment of the orientation of the knuckle 7 at multiple angles.

[0034] And, as Figure 2 shown, in order to improve the stability of device use and the comprehensiveness of detection, there are at least two profiling members 2; a damping hinge 8 is provided at the end of the knuckle 7 away from the hand-held rod 1, and all the profiling members 2 are connected by the damping hinge 8. Relying on the resistance of the damping hinge 8, the profiling member 2 can remain unchanged after being adjusted to a certain rotation angle; the relative positions of the multiple profiling members 2 can be flexibly changed.

[0035] Moreover, this device also includes an image collector and a locator; the image collector and the locator are arranged on the profiling member 2, a display screen is provided on the controller 3, and the controller 3 is electrically connected to the image collector and the locator. During detection, the image collector faces the direction where the air pipeline is located to collect the surface image of the air pipeline, and the locator represents the real-time position of the profiling member 2.

[0036] In this embodiment, the speaker is arranged on the hand-held rod 1, and the controller 3 is electrically connected to the speaker.

[0037] Please refer to Figure 3 , Embodiment 2 of the present invention is as follows: A method for detecting the pressure resistance and leakage of the air pipeline in a hydropower station, which is applied to a device for detecting the pressure resistance and leakage of the air pipeline in a hydropower station in Embodiment 1, includes the following steps: S1. Adjust the position of the profiling member 2 according to the distribution of the air pipeline; In this embodiment, after determining the air pipeline to be detected, the orientations of all the profiling members 2 and the orientation of a single profiling member 2 are adjusted in combination with the knuckle 7. At the same time, the radian of the arc portion 5 of the profiling member 2 also needs to be adjusted accordingly to adapt to air pipelines of different thicknesses.

[0038] S2. Control the arc portion 5 of the profiling member 2 to be close to the air pipeline and move along the pipeline direction of the air pipeline, and at the same time start the sound collector 4; In this embodiment, the roller assembly 6 rolls along the pipeline direction on the air pipeline, so that the profiling member 2 maintains a close relationship with the air pipeline. The real-time sound signal collected by the sound collector 4 is sent to the controller 3 for filtering and analysis.

[0039] S3. Obtain the real-time sound signal collected by the sound collector 4 through the controller 3, control the speaker to play the real-time sound signal, and determine whether the real-time sound signal contains the same sound as the preset leakage signal. If so, issue a leakage risk warning.

[0040] In this embodiment, the preset leakage signal is a sound signal artificially simulated in advance, and some existing sound analysis algorithms such as audio comparison are used to determine whether the real-time sound signal is the same as it or similar within a preset range.

[0041] Moreover, when the same sound as the preset leakage signal appears in the real-time sound signal, stop the movement of the profiling part 2, obtain the pipeline image information of the image collector and the current positioning information of the locator, and integrate the pipeline image information and the current positioning information to obtain the leakage position information. In this way, the position suspected of being confirmed to have a leakage can be marked in time, helping the operator to trace and process the leakage situation after the detection.

[0042] In summary, a hydroelectric power station gas pipeline pressure resistance leakage detection device and method provided by the present invention mainly consists of a handheld rod, a steering knuckle, a profiling part, a controller, and a sound collector. Relying on the length compensation effect of the handheld rod, the close effect of the arc part of the profiling part, and the flexible rotation change of the profiling part, the device can be applied to the detection of gas pipelines in high places or narrow spaces. The sound on the surface of the gas pipeline is obtained by the sound collector, the collected sound is processed such as noise filtering and played on the speaker, and sound comparison is carried out in combination with the preset leakage signal to accurately identify the pressure resistance leakage condition of the gas pipeline. It has at least the following advantages: 1. Environmental noise can be filtered. By collecting the operation noise of the hydroelectric power station in advance, the environmental noise can be removed in the leakage detection of the pressure test, avoiding the influence of the environmental noise of the hydroelectric power plant unit and auxiliary equipment.

[0043] 2. With the design of a telescopic rod and a steering knuckle, the device can be extended and the angle can be adjusted, enabling the sound and image acquisition device to be close to the pipeline, increasing the acquisition range, eliminating the need to install a ladder, and avoiding the operation risk of working at heights.

[0044] 3. With the design of attachment claws, pulleys are attached inside the attachment claws. The acquisition device can be close to the surface of the pipeline, increasing the reliability of sound acquisition. At the same time, it can move along the pipeline direction, reducing the fluctuation of the collected sound signal caused by the change in the distance between the measuring device and the pipeline during the acquisition process.

[0045] 4. With the design of a main unit, it can receive and process the acquisition signal in real time. Through noise removal and filtering processing, it can collect the sound signal of the corresponding pressure-resistant pipe section in real time, and play the processed acquisition signal on the speaker in real time, improving the timeliness and accuracy of leak point discrimination.

[0046] 5. Adopt the design of synchronous acquisition of sound and image. When the gas leakage sound signal is recognized, the images and position information of the pressure test pipe section are automatically collected and saved for marking the leakage point to avoid omission of the leakage point.

[0047] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical fields, are similarly included in the patent protection scope of the present invention.

Claims

1. A pressure-resistant leakage detection device for gas pipelines in a hydropower station, characterized in that: It includes a hand-held rod, a profiling piece, a controller and a sound collector; The profiling member is rotatably arranged at the top end of the hand-held rod, the profiling member is provided with an arc-shaped portion for adapting to the surface of the airway, and the sound collector is arranged on the arc-shaped portion; The controller is arranged at the hand-held end of the hand-held rod, the controller is connected to the sound collector, and the controller is used to analyze the sound signal collected by the sound collector.

2. A hydropower station gas pipeline pressure leakage detection device according to claim 1, characterized in that: Also included is a roller assembly; At least two of the roller assemblies are distributed on the inner arc surface of the arc-shaped portion, and the contoured member can move on the surface of the air pipe through the roller assemblies.

3. A hydropower station gas pipeline pressure leakage detection device according to claim 1, characterized in that: Also includes steering knuckle; One end of the steering knuckle is rotatably arranged on the top end of the hand-held rod, and the contoured member is rotatably arranged on the other end of the steering knuckle.

4. A hydropower station gas pipeline pressure leakage detection device according to claim 3, characterized in that: There are at least two profiling members; A damping hinge is arranged on one end of the steering knuckle away from the hand-held rod, and all the contoured parts are connected via the damping hinge.

5. A hydropower station gas pipeline pressure leakage detection device according to claim 1, characterized in that: It also includes an image collector and a locator; The image collector and the locator are arranged on the profiling member, a display screen is arranged on the controller, and the controller is electrically connected to the image collector and the locator.

6. A hydropower station gas pipeline pressure leakage detection device according to claim 1, characterized in that: Also included are speakers; The speaker is arranged on the hand-held rod, and the controller is electrically connected to the speaker.

7. A hydropower station gas pipeline pressure leakage detection device according to claim 1, characterized in that: The length of the hand-held rod is adjustable.

8. A method for detecting pressure leakage of a gas pipeline in a hydropower station, applied to a device for detecting pressure leakage of a gas pipeline in a hydropower station as claimed in any one of claims 1 to 7, characterized in that: The steps include: S1. adjusting the position of the profiling member according to the distribution of the air pipeline; S2, controlling the arc portion of the profiling member to be close to the air pipe and move along the pipe direction of the air pipe, and starting the sound collector at the same time; S3. The controller obtains the real-time sound signal collected by the sound collector, and determines whether the real-time sound signal contains the same sound as the preset leakage signal. If so, a leakage risk warning is issued.

9. A method for detecting pressure leakage of gas pipelines in a hydropower station according to claim 8, characterized in that: The step S3 also includes: When a sound identical to the preset leakage signal appears in the real-time sound signal, the movement of the profiling member is stopped, the pipeline image information of the image collector and the current positioning information of the locator are acquired, and the pipeline image information and the current positioning information are integrated to obtain the leakage location information.

10. A method for detecting pressure leakage of gas pipelines in a hydropower station according to claim 8, characterized in that: After the controller acquires the real-time sound signal collected by the sound collector, the method further includes: The loudspeaker is controlled to play the real-time sound signal.

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