Marine engine methanol fuel supply pipeline detection device

Abstract

The invention discloses a ship engine methanol fuel supply pipeline detection device, and relates to the technical field of pipeline detection, the ship engine methanol fuel supply pipeline detection device comprises a cabinet, and the upper surface of the cabinet is fixedly provided with a panel. By arranging the case and the panel, a firm protective shell and a flat operation platform are provided for the whole detection device, the case is made of an anti-corrosion material so as to adapt to the marine environment, and the panel serves as an installation reference of each functional module; the spraying mechanism is used for rapidly injecting a detection solution into the methanol fuel supply pipeline, a first connecting frame is fixedly arranged on the outer surface of the spraying mechanism, and the first connecting frame is fixedly connected to the inner wall of the panel. By arranging the spraying mechanism and the first connecting frame, a high-pressure injection system of a detection solution is formed, the first connecting frame provides accurate mounting and positioning for the spraying mechanism, and the spraying mechanism is responsible for generating controllable pressure to quickly inject the detection solution into a to-be-detected pipeline, so that the effect of sealing and detecting a supply pipeline is achieved.

Description

Technical Field

[0001] This invention relates to the field of pipeline testing technology, specifically a testing device for methanol fuel supply pipelines in marine engines. Background Technology

[0002] The airtightness of the methanol fuel supply pipeline for marine engines is the lifeline for ensuring the safe, reliable, and efficient operation of methanol-powered ships. Compared to traditional fuel oil, methanol has stronger permeability and corrosiveness, and its vapor is flammable and explosive, with a wide explosive range when mixed with air. Therefore, even a small leak in the pipeline can lead to serious consequences: liquid methanol leaks can corrode equipment and pollute the environment; the accumulation of gaseous methanol vapor can cause fires or even explosions, directly threatening the lives of crew members and the safety of the ship. In addition, the "latent toxicity" of methanol makes leaks difficult to detect directly by the senses, greatly increasing the potential risks. A tight seal not only prevents danger but is also crucial for ensuring engine performance. If air mixes into the supply system, it will lead to unstable combustion and reduced efficiency; if fuel is accidentally lost, it will affect power output and economy. The entire pipeline from the storage tank to the engine injection valve must maintain an absolutely reliable seal under long-term vibration, temperature changes, and the effects of methanol solvent properties.

[0003] When testing the sealing of the methanol fuel supply pipeline of a ship's engine, once an unsealed leak is located, the continuous leakage is like the system slowly losing blood. This not only means the waste of precious fuel and economic loss, but also subtly changes the engine's pressure, leading to poor combustion, sluggish and unreliable power. Over time, this will cause cumulative damage to the core power components. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a methanol fuel supply pipeline testing device for a marine engine, comprising a chassis, wherein a panel is fixedly mounted on the upper surface of the chassis. By providing the chassis and panel, a robust protective shell and a flat operating platform are provided for the entire testing device. The chassis is made of corrosion-resistant material to adapt to the marine environment, and the panel serves as the installation reference for each functional module. The injection mechanism is used to rapidly inject a detection solution into the methanol fuel supply pipeline. A first connecting frame is fixedly mounted on the outer surface of the injection mechanism and is fixedly connected to the inner wall of the panel. By setting up the injection mechanism and the first connecting frame, a high-pressure injection system for the detection solution is formed. The first connecting frame provides precise installation positioning for the injection mechanism, which is responsible for generating controllable pressure to rapidly inject the detection solution into the pipeline under test, simulating actual fuel delivery conditions and creating initial conditions for leak detection. A positioning mechanism is used to position the methanol fuel supply pipeline. A connecting frame is fixed to the outer surface of the positioning mechanism and is fixed to the upper surface of the panel. By setting up the positioning mechanism and the connecting frame, a pipeline clamping and alignment system is formed. The connecting frame provides a support frame, and the positioning mechanism uses an adaptive clamping device to precisely fix methanol fuel supply pipelines of different diameters and ensure that the pipeline interface is aligned with the injection mechanism. Simultaneously, during the testing process, downward pressure is continuously applied to the pipeline to ensure the sealing and repeatability of the test. A liquid storage mechanism is used to store the liquid being tested in the pipeline. This mechanism integrates an intelligent sensor for detecting liquid flow rate and is fixed to the bottom surface of the internal cavity of the casing. By setting up this liquid storage mechanism as the storage, circulation, and metering center for the tested liquid, its integrated high-precision intelligent sensor can monitor key parameters such as flow rate and pressure in real time, providing quantitative evidence for judging the pipeline's sealing performance and serving as the core of the testing system's data acquisition. A second connecting frame extends through the upper surface of the panel. A track bar is fixed to the inner wall of the second connecting frame, and a track groove is formed on the outer surface of the track bar. The positioning mechanism includes a sliding column, which is slidably connected to the inner cavity of the track bar. A positioning ring is fixed to the end of the sliding column. By setting up the second connecting frame, the track bar, the sliding column, and the positioning ring, a horizontal movement guide and centering system for the positioning mechanism is formed. The second connecting frame provides installation space, the precision track groove of the track bar ensures that the sliding column moves linearly without deviation, and the positioning ring serves as the initial positioning and sealing docking component for the pipeline end.

[0005] Preferably, the spraying mechanism includes a stepper motor and a fixing block. The stepper motor is fixed to the inner wall of the first connecting frame. A rotating rod is installed at the output end of the stepper motor through a coupling. A drive wheel is fixed at the bottom end of the rotating rod. The fixing block is fixedly connected to the bottom surface of the inner cavity of the track bar.

[0006] Preferably, a pressure box is fixedly provided at the end of the fixed block away from the track bar, a liquid inlet box is fixedly provided on the lower surface of the pressure box, a turbine blade is rotatably connected to the inner cavity of the liquid inlet box, a driven wheel is fixedly provided on the lower surface of the turbine blade, and the driven wheel is connected to the driving wheel through a belt.

[0007] Preferably, a rolling bearing is fixedly mounted on the lower surface of the turbine blade, the outer ring of the rolling bearing is fixedly mounted on the outer surface of the liquid inlet tank, a connecting pipe passes through the outer surface of the liquid inlet tank, a plurality of evenly distributed connecting holes are opened in the inner cavity of the pressurization tank, a guide column is fixedly mounted on the inner wall of the pressurization tank, a liquid outlet is fixedly mounted on the upper surface of the pressurization tank, and a sealing ring is fixedly mounted on the outer surface of the liquid outlet.

[0008] Preferably, the positioning mechanism includes a hydraulic cylinder, which is fixed to the top of the connecting frame. A moving rod is provided at the output end of the hydraulic cylinder, and a support rod is fixed at the bottom end of the moving rod. The end of the support rod away from the moving rod is fixed to the end of the sliding column.

[0009] Preferably, a support plate is fixed to the inner wall of the positioning ring, and there are four support plates evenly distributed. A soft pad is fixed to the outer surface of the support plate, and an arc-shaped plate is fixed to the outer surface of the soft pad. The arc-shaped plate is an outwardly flipped arc-shaped rod. An elastic strip is fixed to the bottom end of the outer surface of the arc-shaped plate, and the two ends of the elastic strip are fixed to the outer surface of the support plate. An anti-slip plate is fixed to the top end of the arc-shaped plate.

[0010] Preferably, a limiting rod is fixed to the outer surface of the track bar, a sliding tube is sleeved on the outer surface of the limiting rod, a first spring is fixed to the top of the limiting rod, the top of the first spring is fixed to the top surface of the inner cavity of the sliding tube, a movable frame is fixed to the top of the sliding tube, a fixed rod is fixed to the inner wall of the movable frame, and a compression ring is fixed to the bottom of the fixed rod, the compression ring being compression-fitted to the outer surface of the arc plate.

[0011] Preferably, the liquid storage mechanism includes a track rod, which is fixed to the outer surface of the panel. A sliding ring is slidably connected to the outer surface of the track rod. A second spring is fixed to the lower surface of the sliding ring. The bottom end of the second spring is fixed to the outer surface of the track rod. A placement frame is fixed to the outer surface of the sliding ring. A pad is fixed to the bottom surface of the inner cavity of the placement frame.

[0012] Preferably, a limiting frame is fixed to the lower surface of the placement frame, and a guide hole is opened at the end of the limiting frame away from the placement frame. The liquid storage mechanism also includes a first elevating block and a second elevating block. The first elevating block is fixed to the bottom surface of the inner cavity of the chassis, and a storage tank is fixed to the upper surface of the first elevating block. The end of the connecting pipe away from the liquid inlet tank penetrates the outer surface of the storage tank. The second elevating block is fixed to the bottom surface of the inner cavity of the chassis, and a collecting cylinder is fixed to the upper surface of the second elevating block. The collecting cylinder is a transparent glass cylinder with graduations. The collecting cylinder is connected to the storage tank through a connecting valve. The connecting valve integrates a flow sensor and a pressure sensor. A funnel penetrates the side of the collecting cylinder away from the connecting valve. The funnel is located directly below the guide hole opened at the end of the limiting frame.

[0013] This invention provides a detection device for the methanol fuel supply pipeline of a ship's engine. It has the following advantages: I. The ship engine methanol fuel supply pipeline detection device, by setting up a spraying mechanism and a first connecting frame, constitutes a high-pressure injection system for the detection solution. The first connecting frame provides precise installation positioning for the spraying mechanism, which is responsible for generating controllable pressure to quickly inject the detection solution into the pipeline to be tested, simulating actual fuel delivery conditions and creating initial conditions for leak detection.

[0014] II. The methanol fuel supply pipeline testing device for ship engines, by setting up a positioning mechanism and a connecting frame, constitutes a pipeline clamping and alignment system. The connecting frame provides a support frame, and the positioning mechanism uses an adaptive clamping device to accurately fix methanol fuel supply pipelines of different diameters and ensure that the pipeline interface is aligned with the spraying mechanism. At the same time, it continuously applies downward pressure to the pipeline during the testing process to ensure the sealing and repeatability of the test.

[0015] Third, the methanol fuel supply pipeline testing device for the ship's engine, by setting up a liquid storage mechanism, serves as the storage, circulation, and metering center for the testing liquid. Its integrated high-precision intelligent sensors can monitor key parameters such as flow rate and pressure in real time, providing quantitative basis for judging the pipeline sealing performance and serving as the data acquisition core of the testing system.

[0016] IV. The methanol fuel supply pipeline testing device for the ship's engine utilizes rolling bearings to provide high-precision, low-friction support for the turbine blade's rotating shaft, ensuring its stability and long service life under high-speed operation. A connecting pipe connects the inlet tank to the storage tank of the liquid storage mechanism, forming the intake channel for the test solution. The design of connecting holes, guide columns, outlets, and sealing rings within the pressure chamber optimizes the fluid dynamics within the pressure chamber. The connecting holes ensure uniform liquid entry into the pressurization zone, the guide columns eliminate eddies and stabilize the flow field, the outlet serves as the outlet for the high-pressure solution, and the external sealing rings ensure absolute sealing when connected to pipeline interfaces or testing accessories, preventing pressure leakage from affecting test accuracy.

[0017] V. The methanol fuel supply pipeline testing device for the ship's engine, by setting up support plates, soft pads, arc-shaped plates, elastic strips, and anti-slip plates, constitutes an adaptive and highly inclusive pipeline inner wall clamping system. Four evenly distributed support plates provide basic support points, soft pads act as a buffer layer to protect the pipeline inner wall, and the unique outward flipping design of the arc-shaped plates allows them to be closed in the initial state. After being inserted into the pipeline, the arc surface can be flipped outward by an external mechanism to tightly fit the pipeline inner wall. The elastic strip provides restoring force and assists in the outward flipping action. The anti-slip plate at the top is made of a high-friction coefficient material to ensure that it will not slip even under the impact of high-pressure liquid after clamping, achieving reliable anchoring from inside the pipeline. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the external structure of a methanol fuel supply pipeline detection device for a ship engine according to the present invention; Figure 2 This is a side view of the structure of a methanol fuel supply pipeline testing device for a ship engine according to the present invention; Figure 3 This is a schematic diagram of the spraying mechanism of the present invention; Figure 4 This is a schematic cross-sectional view of the spraying mechanism of the present invention; Figure 5 This is a partial cross-sectional structural diagram of the spraying mechanism of the present invention; Figure 6 This is a schematic diagram of the positioning mechanism structure of the present invention; Figure 7 This is a partial structural diagram of the positioning mechanism of the present invention; Figure 8 This is a partial cross-sectional structural diagram of the positioning mechanism of the present invention; Figure 9 This is a schematic diagram of the extrusion ring structure of the present invention; Figure 10 This is a schematic diagram of the liquid storage mechanism of the present invention.

[0019] In the diagram: 1. Chassis; 2. Front panel; 3. First connecting frame; 4. Spraying mechanism; 41. Stepper motor; 42. Rotating rod; 43. Drive wheel; 44. Belt; 45. Fixing block; 46. Pressure tank; 47. Liquid inlet tank; 48. Rolling bearing; 49. Turbine blade; 410. Connecting pipe; 411. Connecting hole; 412. Guide column; 413. Liquid outlet; 414. Sealing ring; 415. Driven wheel; 5. Second connecting frame; 6. Connecting bracket; 7. Positioning mechanism; 71. Hydraulic cylinder; 72. Moving rod; 73. Support rod; 74. Sliding column; 75. Positioning ring; 76. Support plate; 77. Soft pad; 78. Arc plate; 79. Elastic strip; 710. Anti-slip plate; 711. Limiting rod; 712. Sliding tube; 713. First spring; 714. Movable frame; 715. Fixed rod; 716. Extrusion ring; 8. Liquid storage mechanism; 81. Track rod; 82. Sliding ring; 83. Second spring; 84. Placement frame; 85. Pad; 86. Limiting frame; 87. Second raising block; 88. Storage tank; 89. Second raising block; 810. Collection cylinder; 811. Connecting valve; 812. Funnel; 10. Track bar. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0021] like Figures 1-10 As shown, the present invention provides a technical solution: a methanol fuel supply pipeline testing device for a ship engine, including a housing 1, with a panel 2 fixed on the upper surface of the housing 1. By setting the housing 1 and the panel 2, a robust protective shell and a flat operating platform are provided for the entire testing device. The housing 1 is made of corrosion-resistant material to adapt to the marine environment, and the panel 2 serves as the installation reference for each functional module; The injection mechanism 4 is used to rapidly inject a detection solution into the methanol fuel supply pipeline. A first connecting frame 3 is fixedly mounted on the outer surface of the injection mechanism 4 and is fixedly connected to the inner wall of the panel 2. By setting up the injection mechanism 4 and the first connecting frame 3, a high-pressure injection system for the detection solution is formed. The first connecting frame 3 provides precise installation positioning for the injection mechanism 4, which is responsible for generating controllable pressure to rapidly inject the detection solution into the pipeline under test, simulating actual fuel delivery conditions and creating initial conditions for leak detection. Positioning mechanism 7 is used to position the methanol fuel supply pipeline. A connecting frame 6 is fixed to the outer surface of the positioning mechanism 7 and is fixed to the upper surface of the panel 2. By setting the positioning mechanism 7 and the connecting frame 6, a pipeline clamping and alignment system is formed. The connecting frame 6 provides a support frame. The positioning mechanism 7 accurately fixes methanol fuel supply pipelines of different diameters through an adaptive clamping device and ensures that the pipeline interface is aligned with the spraying mechanism 4. At the same time, it continuously applies downward pressure to the pipeline during the detection process to ensure the sealing and repeatability of the detection. The liquid storage mechanism 8 is used to store the liquid being tested in the pipeline. The liquid storage mechanism 8 integrates an intelligent sensor for detecting liquid flow rate and is fixed to the bottom surface of the inner cavity of the casing 1. By setting up the liquid storage mechanism 8 as the storage, circulation, and metering center for the tested liquid, its integrated high-precision intelligent sensor can monitor key parameters such as flow rate and pressure in real time, providing quantitative basis for judging the pipeline sealing performance and serving as the data acquisition core of the testing system. A second connecting frame 5 runs through the upper surface of panel 2. A track bar 10 is fixed to the inner wall of the second connecting frame 5, and a track groove is formed on the outer surface of the track bar 10. The positioning mechanism 7 includes a sliding column 74, which is slidably connected to the inner cavity of the track bar 10. A positioning ring 75 is fixed to the end of the sliding column 74. By setting the second connecting frame 5, the track bar 10, the sliding column 74, and the positioning ring 75, a horizontal movement guide and centering system for the positioning mechanism 7 is formed. The second connecting frame 5 provides installation space, the precision track groove of the track bar 10 ensures that the sliding column 74 moves linearly without deviation, and the positioning ring 75 serves as the initial positioning and sealing docking component for the end of the pipeline.

[0022] The spraying mechanism 4 includes a stepper motor 41 and a fixing block 45. The stepper motor 41 is fixed to the inner wall of the first connecting frame 3. The output end of the stepper motor 41 is connected to a rotating rod 42 via a coupling. The bottom end of the rotating rod 42 is fixed to a drive wheel 43. The fixing block 45 is fixedly connected to the bottom surface of the inner cavity of the track bar 10. By setting the stepper motor 41, rotating rod 42, drive wheel 43 and fixing block 45, the power input and transmission starting part of the spraying mechanism 4 is formed. The stepper motor 41 provides precise and controllable speed and torque, the rotating rod 42 transmits power vertically downward, the drive wheel 43 serves as the drive wheel of the belt 44, and the fixing block 45 is used to fix the pressure box 46 below to ensure the stability of the power transmission path.

[0023] A pressure chamber 46 is fixedly mounted on the end of the fixed block 45 away from the track bar 10. A liquid inlet tank 47 is fixedly mounted on the lower surface of the pressure chamber 46. A turbine blade 49 is rotatably connected to the inner cavity of the liquid inlet tank 47. A driven wheel 415 is fixedly mounted on the lower surface of the turbine blade 49. The driven wheel 415 is connected to the driving wheel 43 via a belt 44. By setting up the pressure chamber 46, the liquid inlet tank 47, the turbine blade 49, the driven wheel 415, and the belt 44, the core of pressurized delivery of the test solution is formed. The pressure chamber 46 serves as a pressure generation chamber, the liquid inlet tank 47 houses the turbine blade 49 and serves as a liquid inlet, the turbine blade 49 rotates at high speed driven by the driven wheel 415, and the driven wheel 415 receives power from the driving wheel 43 via the belt 44. When the turbine blade 49 rotates, it does work on the liquid, converting its kinetic energy into pressure energy, thereby pumping the test solution out at a certain pressure.

[0024] A rolling bearing 48 is fixed to the lower surface of the turbine blade 49. The outer ring of the rolling bearing 48 is fixed to the outer surface of the liquid inlet tank 47. A connecting pipe 410 passes through the outer surface of the liquid inlet tank 47. Several evenly distributed connecting holes 411 are opened in the inner cavity of the pressure tank 46. A guide column 412 is fixed to the inner wall of the pressure tank 46. A liquid outlet 413 is fixed to the upper surface of the pressure tank 46, and a sealing ring 414 is fixed to the outer surface of the liquid outlet 413. By setting the rolling bearing 48, high-precision, low-friction support is provided for the rotating shaft of the turbine blade 49, ensuring its stability and long service life under high-speed operation. By setting the connecting pipe 410, the liquid inlet tank 47 is connected to the storage tank 88 of the liquid storage mechanism 8, forming a suction channel for the detection solution. By setting up the connecting hole 411, the guide column 412, the liquid outlet 413, and the sealing ring 414 in the pressure chamber 46, the fluid dynamics performance in the pressure chamber is optimized. The connecting hole 411 allows the liquid to enter the pressure zone evenly, the guide column 412 eliminates eddies and stabilizes the flow field, the liquid outlet 413 is the outlet of the high-pressure solution, and the sealing ring 414 on the outside ensures absolute sealing when connected to pipeline interfaces or testing accessories to prevent pressure leakage from affecting the test accuracy.

[0025] The positioning mechanism 7 includes a hydraulic cylinder 71, which is fixed to the top of the connecting frame 6. A moving rod 72 is mounted on the output end of the hydraulic cylinder 71, and a support rod 73 is fixed to the bottom end of the moving rod 72. The end of the support rod 73 away from the moving rod 72 is fixed to the end of the sliding column 74. By configuring the hydraulic cylinder 71, the moving rod 72, and the support rod 73, a vertical drive and force transmission system for the positioning mechanism 7 is formed. The hydraulic cylinder 71 provides a powerful and stable linear thrust, the moving rod 72 directly outputs displacement, and the support rod 73 reliably transmits the vertical hydraulic drive force and converts it into a horizontal traction or pushing action on the sliding column 74, thereby controlling the movement of the positioning ring 75 on the track 10 and achieving the clamping or release of the pipeline.

[0026] A support plate 76 is fixed to the inner wall of the positioning ring 75. There are four support plates 76, and the four support plates 76 are evenly distributed. A soft pad 77 is fixed to the outer surface of the support plate 76. An arc-shaped plate 78 is fixed to the outer surface of the soft pad 77. The arc-shaped plate 78 is an outwardly flipping arc-shaped rod. An elastic strip 79 is fixed to the bottom end of the outer surface of the arc-shaped plate 78. The two ends of the elastic strip 79 are fixed to the outer surface of the support plate 76. An anti-slip piece 710 is fixed to the top end of the arc-shaped plate 78. By setting up support plates 76, soft pads 77, curved plates 78, elastic strips 79, and anti-slip plates 710, an adaptive and highly inclusive pipe inner wall clamping system is formed. The four evenly distributed support plates 76 provide basic support points, the soft pads 77 act as a buffer layer to protect the inner wall of the pipe, and the unique outward flipping design of the curved plates 78 allows them to be folded in the initial state. After being inserted into the pipe, the curved surface can be flipped outward by an external mechanism to fit tightly against the inner wall of the pipe. The elastic strips 79 provide restoring force and assist in the outward flipping action. The anti-slip plates 710 at the top are made of high friction coefficient material to ensure that they will not slip even under the impact of high-pressure liquid after clamping, thus achieving reliable anchoring from inside the pipe.

[0027] A limiting rod 711 is fixed on the outer surface of the track bar 10. A sliding tube 712 is sleeved on the outer surface of the limiting rod 711. A first spring 713 is fixed at the top of the limiting rod 711. The top of the first spring 713 is fixed on the top surface of the inner cavity of the sliding tube 712. A movable frame 714 is fixed at the top of the sliding tube 712. A fixing rod 715 is fixed on the inner wall of the movable frame 714. A compression ring 716 is fixed at the bottom of the fixing rod 715. The compression ring 716 is compression-fitted to the outer surface of the arc plate 78. By setting a limiting rod 711, a sliding tube 712, a first spring 713, a movable frame 714, a fixed rod 715, and a compression ring 716, a clever mechanical linkage clamping trigger and locking mechanism is formed. The limiting rod 711 provides vertical guidance, along which the sliding tube 712 can slide. The first spring 713 provides downward preload. When the positioning ring 75, carrying the retracted arc plate 78, is inserted into the pipeline to a predetermined depth, the movable frame 714 contacts the pipeline end face, the sliding tube 712 is pushed upward, compressing the first spring 713. At the same time, the compression ring 716 at the bottom of the fixed rod 715 moves downward, pressing precisely into the back of the arc plate 78, forcing the arc plate 78 to be compressed, thereby causing the anti-slip plate 710 at its top to press tightly against the inner wall of the pipeline, achieving automatic and reliable internal expansion clamping. The entire process is purely mechanical linkage and requires no additional control.

[0028] The liquid storage mechanism 8 includes a track rod 81, which is fixed to the outer surface of the panel 2. A sliding ring 82 is slidably connected to the outer surface of the track rod 81. A second spring 83 is fixed to the lower surface of the sliding ring 82, and the bottom end of the second spring 83 is fixed to the outer surface of the track rod 81. A placement frame 84 is fixed to the outer surface of the sliding ring 82, and a pad 85 is fixed to the bottom surface of the inner cavity of the placement frame 84. By setting up the track rod 81, the sliding ring 82, the second spring 83, the placement frame 84, and the pad 85, a suspension, balancing, and buffering system for the test pipeline is formed. The track rod 81 provides a vertical movement track along which the sliding ring 82 can slide up and down. The second spring 83 provides an upward supporting force to balance part of the weight of the pipeline. The placement frame 84 is used to support the pipeline, and the pad 85 inside is made of flexible material to prevent scratches on the pipeline surface. This design allows the pipeline to be buffered when it undergoes small displacements due to temperature changes or pressure fluctuations during testing, avoiding additional stress, and also facilitating the installation and disassembly of the pipeline.

[0029] A limiting frame 86 is fixedly provided on the lower surface of the placement frame 84. A guide hole is opened at the end of the limiting frame 86 away from the placement frame 84. The liquid storage mechanism 8 also includes a first raising block 87 and a second raising block 89. The first raising block 87 is fixedly provided on the bottom surface of the inner cavity of the chassis 1. A storage tank 88 is fixedly provided on the upper surface of the first raising block 87. The end of the connecting pipe 410 away from the liquid inlet tank 47 passes through the outer surface of the storage tank 88. The second raising block 89 is fixedly provided on the bottom surface of the inner cavity of the chassis 1. A collection cylinder 810 is fixedly provided on the upper surface of the second raising block 89. The collection cylinder 810 is a transparent glass cylinder with graduations. The collection cylinder 810 is connected to the storage tank 88 through a connecting valve 811. The connecting valve 811 integrates a flow sensor and a pressure sensor. A funnel 812 passes through the side of the collection cylinder 810 away from the connecting valve 811. The funnel 812 is located directly below the guide hole opened at the end of the limiting frame 86. A limiting bracket 86 and its guide hole are used to guide the test liquid that may leak from the tested pipeline, directing it to the collection device. A first elevating block 87 and a storage tank 88 form the main storage tank for the test solution. The first elevating block 87 raises the storage tank 88 to facilitate gravity flow of the liquid into the spraying mechanism 4. The storage tank 88 has sufficient capacity and is equipped with a liquid level indicator. A second elevating block 89, a collection cylinder 810, a connecting valve 811, and a funnel 812 form a system for collecting, measuring, and monitoring the leaked liquid. The second elevating block 89 raises the collection cylinder 810 for easy observation. The transparent collection cylinder 810 has graduations, allowing direct visual observation of the leakage amount. The connecting valve 811 controls the connection between the collection cylinder 810 and the storage tank 88. Its integrated flow sensor accurately measures the real-time flow rate and cumulative volume of the leaked liquid, while a pressure sensor monitors the system pressure. The funnel 812 is directly opposite the guide hole, efficiently collecting leaked droplets. This system can quantitatively assess the sealing performance of the pipeline, providing a direct basis for determining its compliance.

[0030] Working principle: First, the operator places the methanol fuel supply pipeline to be tested horizontally in the testing area, with one end roughly aligned with the positioning ring 75 of the positioning mechanism 7, and the other end or the pipeline body placed in the placement frame 84 of the liquid storage mechanism 8, flexibly supported by the pad 85. The positioning mechanism 7 is activated, and the hydraulic cylinder 71 drives the moving rod 72 to extend, pushing the sliding column 74 horizontally along the precision track of the track bar 10 towards the end of the pipeline via the support rod 73, until the positioning ring 75 is inserted into the pipeline port.

[0031] When the positioning ring 75 is inserted to the predetermined depth, as the sliding column 74 continues to advance, the compression ring 716 presses against the back of the evenly distributed arc-shaped plates 78 inside the positioning ring 75. Under the compression action, the originally contracted arc-shaped plates 78 overcome the tension of the elastic strip 79 and flip inward, and the anti-slip plate 710 at its top then presses tightly against the inner wall of the pipeline. By having the four evenly distributed arc-shaped plates 78 flip inward simultaneously, uniform and reliable expansion and tightening of the outer wall of the pipeline is achieved, completing adaptive anchoring and sealing, and establishing a closed starting point for high-pressure liquid injection; After the pipeline is anchored and sealed, the spraying mechanism 4 is activated. The stepper motor 41 drives the drive wheel 43 to rotate via the rotating rod 42, and the power is transmitted to the driven wheel 415 via the belt 44, which drives the turbine blades 49 to rotate at high speed in the liquid inlet tank 47. The test liquid is a special test liquid with similar physical properties to methanol but without corrosiveness, which is drawn into the liquid inlet tank 47 from the storage tank 88 through the connecting pipe 410.

[0032] High-speed rotating turbine blades 49 perform work on the liquid, imparting kinetic energy and pressure. The pressurized liquid enters the pressurization chamber through the connecting hole 411 at the bottom of the pressurization tank 46. After being rectified by the guide column 412, the pressure is further stabilized and increased. Finally, the high-pressure detection fluid is forcibly injected into the anchored methanol fuel pipeline through the sealed interface formed by the outlet 413 and the sealing ring 414. The stepper motor 41 has an adjustable speed, thereby precisely controlling the injection pressure and flow rate to simulate the pressure conditions of an actual fuel supply system.

[0033] Once the test fluid fills the pipeline under test and reaches the preset test pressure, the spraying mechanism 4 can temporarily stop or switch to a low-speed maintenance mode, and the system enters the pressure holding observation period. During this period, the high-precision pressure sensor integrated inside the connecting valve 811 monitors and records the pressure change curve in the pipeline system in real time.

[0034] If a leak is found in the tested pipeline, such as a weld crack, loose joint, or pinhole in the pipe wall, the test fluid will seep out from the leak under internal pressure. The seeping fluid drips under gravity and is guided by the limiting bracket 86 below the placement frame 84, falling through its guide hole into the funnel 812 directly below. The funnel 812 then pours the leaked fluid into a transparent collection cylinder 810 with precise graduations.

[0035] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A detection device for a methanol fuel supply pipeline of a marine engine, characterized in that, include: A chassis (1) has a panel (2) fixed on its upper surface. The spraying mechanism (4) is used to rapidly inject a detection solution into the methanol fuel supply pipeline. The outer surface of the spraying mechanism (4) is fixedly provided with a first connecting frame (3), which is fixedly connected to the inner wall of the panel (2). Positioning mechanism (7) is used to position the methanol fuel supply pipeline. A connecting frame (6) is fixed on the outer surface of the positioning mechanism (7) and the connecting frame (6) is fixed on the upper surface of the panel (2). Liquid storage mechanism (8) is used to store the liquid detected in the pipeline. The liquid storage mechanism (8) integrates an intelligent sensor for detecting the liquid flow rate. The liquid storage mechanism (8) is fixed to the bottom surface of the inner cavity of the chassis (1). The upper surface of the panel (2) is penetrated by a second connecting frame (5), and a track bar (10) is fixedly provided on the inner wall of the second connecting frame (5). A track groove is provided on the outer surface of the track bar (10). The positioning mechanism (7) includes a sliding column (74), which is slidably connected to the inner cavity of the track bar (10). A positioning ring (75) is fixedly provided at the end of the sliding column (74).

2. The detection device for a methanol fuel supply pipeline of a ship engine according to claim 1, characterized in that: The spraying mechanism (4) includes a stepper motor (41) and a fixing block (45). The stepper motor (41) is fixed on the inner wall of the first connecting frame (3). The output end of the stepper motor (41) is equipped with a rotating rod (42) through a coupling. The bottom end of the rotating rod (42) is fixed with a drive wheel (43). The fixing block (45) is fixedly connected to the bottom surface of the inner cavity of the track bar (10).

3. The detection device for a methanol fuel supply pipeline of a ship engine according to claim 2, characterized in that: A pressure box (46) is fixed at one end of the fixed block (45) away from the track bar (10). A liquid inlet box (47) is fixed on the lower surface of the pressure box (46). A turbine blade (49) is rotatably connected to the inner cavity of the liquid inlet box (47). A driven wheel (415) is fixed on the lower surface of the turbine blade (49). The driven wheel (415) is connected to the driving wheel (43) through a belt (44).

4. The detection device for a methanol fuel supply pipeline of a ship engine according to claim 3, characterized in that: A rolling bearing (48) is fixed on the lower surface of the turbine blade (49). The outer ring of the rolling bearing (48) is fixed on the outer surface of the liquid inlet tank (47). A connecting pipe (410) passes through the outer surface of the liquid inlet tank (47). Several evenly distributed connecting holes (411) are opened in the inner cavity of the pressurization tank (46). A guide column (412) is fixed on the inner wall of the pressurization tank (46). An outlet (413) is fixed on the upper surface of the pressurization tank (46). A sealing ring (414) is fixed on the outer surface of the outlet (413).

5. The detection device for a methanol fuel supply pipeline of a ship engine according to claim 1, characterized in that: The positioning mechanism (7) includes a hydraulic cylinder (71), which is fixed at the top of the connecting frame (6). The output end of the hydraulic cylinder (71) is provided with a moving rod (72), and the bottom end of the moving rod (72) is fixed with a support rod (73). The end of the support rod (73) away from the moving rod (72) is fixed at the end of the sliding column (74).

6. The detection device for a methanol fuel supply pipeline of a ship engine according to claim 5, characterized in that: The inner wall of the positioning ring (75) is fixed with a support plate (76). There are four support plates (76), and the four support plates (76) are evenly distributed. A soft pad (77) is fixed on the outer surface of the support plate (76). An arc plate (78) is fixed on the outer surface of the soft pad (77). The arc plate (78) is an outwardly flipped arc rod. An elastic strip (79) is fixed at the bottom of the outer surface of the arc plate (78). The two ends of the elastic strip (79) are fixed on the outer surface of the support plate (76). An anti-slip plate (710) is fixed at the top of the arc plate (78).

7. A detection device for a methanol fuel supply pipeline of a marine engine according to claim 6, characterized in that: A limiting rod (711) is fixed on the outer surface of the track bar (10). A sliding tube (712) is sleeved on the outer surface of the limiting rod (711). A first spring (713) is fixed at the top of the limiting rod (711). The top of the first spring (713) is fixed on the top surface of the inner cavity of the sliding tube (712). A movable frame (714) is fixed at the top of the sliding tube (712). A fixing rod (715) is fixed at the inner wall of the movable frame (714). A compression ring (716) is fixed at the bottom of the fixing rod (715). The compression ring (716) is compression-fitted to the outer surface of the arc plate (78).

8. A detection device for a methanol fuel supply pipeline of a ship engine according to claim 4, characterized in that: The liquid storage mechanism (8) includes a track rod (81), which is fixed on the outer surface of the panel (2). A sliding ring (82) is slidably connected to the outer surface of the track rod (81). A second spring (83) is fixed on the lower surface of the sliding ring (82). The bottom end of the second spring (83) is fixed on the outer surface of the track rod (81). A placement frame (84) is fixed on the outer surface of the sliding ring (82). A pad (85) is fixed on the bottom surface of the inner cavity of the placement frame (84).

9. A detection device for a methanol fuel supply pipeline of a ship engine according to claim 8, characterized in that: A limiting frame (86) is fixedly provided on the lower surface of the placement frame (84). A guide hole is provided at the end of the limiting frame (86) away from the placement frame (84). The liquid storage mechanism (8) also includes a first raising block (87) and a second raising block (89). The first raising block (87) is fixedly provided on the bottom surface of the inner cavity of the chassis (1). A storage tank (88) is fixedly provided on the upper surface of the first raising block (87). The end of the connecting pipe (410) away from the liquid inlet tank (47) penetrates the outer surface of the storage tank (88). The second raising block (89) A collection cylinder (810) is fixed on the bottom surface of the inner cavity of the chassis (1). The upper surface of the second shim block (89) is fixed with a collection cylinder (810). The collection cylinder (810) is a transparent glass cylinder with graduations. The collection cylinder (810) is connected to the storage tank (88) through a connecting valve (811). The connecting valve (811) integrates a flow sensor and a pressure sensor. A funnel (812) runs through the side of the collection cylinder (810) away from the connecting valve (811). The funnel (812) is located directly below the guide hole opened at the end of the limit frame (86).

Images