Marine engine methanol fuel supply pipeline detection device

Abstract

The utility model relates to the technical field of pipeline detection, and provides a ship engine methanol fuel supply pipeline detection device which comprises a base frame and a clamp, the detection device further comprises an inner penetrating pipe capable of coaxially penetrating through a pipeline, and two liquid blocking pieces matched with the inner diameter of the pipeline are coaxially arranged on the inner penetrating pipe in a penetrating mode. Liquid outlet holes are uniformly distributed in the pipe section, between the two liquid baffle sheets, of the inner penetrating pipe; a liquid tank is arranged on the base frame, a matched sealing piston is arranged in the liquid tank, and a balancing weight and a scale rod are arranged on the sealing piston; the accurate leakage value is obtained by multiplying the distance difference value between the position of the upper edge of the liquid tank body and the initial position after the scale rod is observed to finish the test by the area of the inner cavity of the liquid tank, and the leakage amount of a liquid column with a unit length flowing through the pipeline at a certain pressure and speed is obtained, so that the leakage condition of the pipeline is accurately evaluated. And an accurate basis is provided for subsequent pipeline repair or direct replacement of a new pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline detection, in particular to a detection device for a methanol fuel supply pipeline of a ship engine. Background Technique

[0002] In a ship power system, as a key component of a ship's dual-fuel engine, the methanol fuel supply system's stability and safety are directly related to the overall operating efficiency and safety performance of the ship. During actual use, the methanol fuel supply pipeline may experience leakage problems due to various factors such as material aging and corrosion. This not only causes waste of resources but may also trigger serious safety accidents such as fires and explosions.

[0003] Normally, staff will regularly check the methanol fuel supply pipeline to ensure its integrity. Once a leakage occurs in the methanol fuel supply pipeline, it will be removed for detection to evaluate whether it can be repaired and continue to be used. Existing detection methods, such as ultrasonic detection and pressure measurement methods, usually only provide qualitative information on whether there is a leakage and cannot simulate and detect the accurate leakage value of methanol fuel under actual flow conditions, thus affecting the accurate assessment of the severity of pipeline leakage and bringing trouble to subsequent repair decisions.

[0004] Therefore, the utility model proposes a detection device for a methanol fuel supply pipeline of a ship engine to solve the above problems. Content of the Utility Model

[0005] The purpose of the embodiment of the utility model is to provide a detection device for a methanol fuel supply pipeline of a ship engine to solve the above problems.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A detection device for a methanol fuel supply pipeline of a ship engine includes a base frame and a clamp provided on the base frame for clamping the methanol fuel supply pipeline. The detection device further includes an inner pipe that can be coaxially inserted through the pipeline. Two liquid blocking sheets adapted to the inner diameter of the pipeline are coaxially arranged on the inner pipe, and sealing rings are provided on both liquid blocking sheets. Liquid outlet holes are evenly distributed on the pipe section of the inner pipe between the two liquid blocking sheets;

[0008] A liquid tank is provided on the base frame. A suitable sealing piston is provided in the liquid tank, and a counterweight block and a scale rod are provided on the sealing piston. A liquid injection port and a liquid delivery port are provided on the liquid tank, and a liquid delivery pipe is provided between the liquid delivery port and the end of the inner pipe away from the clamp;

[0009] The detection device further includes a preparation cylinder and a receiving cylinder that are coaxial with the clamped and fixed pipeline. The inner diameters of the preparation cylinder and the receiving cylinder are the same as the inner diameter of the pipeline, and the lengths of the preparation cylinder and the receiving cylinder are both greater than the distance between the two liquid blocking sheets. The preparation cylinder is located between the inner through pipe and the fixture, and the receiving cylinder is located on the side of the fixture away from the preparation cylinder. The preparation cylinder and the receiving cylinder can move away from / approach the fixture for adjustment to abut against both ends of the pipeline respectively. An exhaust nozzle is provided on the preparation cylinder, and sealing valves are provided on the exhaust nozzle, the liquid injection port, and the liquid infusion port.

[0010] In an alternative solution: a limiting block is provided on the liquid tank, the scale rod can slide through the limiting block, scale lines are provided on the scale rod, and a pointer for indicating the numerical value of the scale line is provided on the limiting block.

[0011] In an alternative solution: an upper limiting boss and a lower limiting boss for respectively limiting the upper and lower extreme positions of the sealing piston are provided on the inner wall of the liquid tank.

[0012] In an alternative solution: the detection device further includes a driving mechanism for inserting the inner through pipe into the pipeline. The driving mechanism includes a U-shaped member and a support member provided on the U-shaped member. The inner through pipe is provided on the support member, and the inner through pipe is coaxial with the preparation cylinder / the receiving cylinder. A rack and two chutes are provided on the base frame. Two ends of the U-shaped member are respectively slidably clamped in the two chutes. A rotatable rotating shaft and a driving member for driving the rotation of the rotating shaft are provided on the U-shaped member. A gear meshing with the rack is sleeved on the rotating shaft, and the driving member is a variable-speed servo motor.

[0013] In an alternative solution: the counterweight block is provided with a variety of different mass specifications, at least two insertion columns are provided on the sealing piston, and insertion holes adapted to and corresponding to the insertion columns are provided on the counterweight block.

[0014] In an alternative solution: sealing gaskets are provided at the ends of the preparation cylinder and the receiving cylinder that abut against the pipeline ends.

[0015] In an alternative solution: both the preparation cylinder and the receiving cylinder are adjusted to move away from / approach the fixture through telescopic members.

[0016] In an alternative solution: a liquid receiving tray for receiving the test liquid is provided at the position where the base frame is located below the fixture.

[0017] Compared with the prior art, the beneficial effects of the embodiments of the present utility model are as follows:

[0018] A liquid column with a unit length is tested through a pipeline under constant pressure and constant speed. After the test is completed by observing the scale rod, the difference in distance between the position at the upper edge of the liquid tank body and the initial position is multiplied by the inner cavity area of the liquid tank to obtain the accurate leakage value. The leakage amount when a liquid column with a unit length flows through the pipeline at a certain pressure and speed is obtained, so as to accurately evaluate the leakage condition of the pipeline and provide an accurate basis for subsequent pipeline repair or direct replacement with a new pipeline.

[0019] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit this application. Brief Description of the Drawings

[0020] The drawings here are incorporated into the specification and form a part of this specification to show the embodiments in line with this application, and are used together with the specification to explain the principles of this application. At the same time, these drawings and text descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments.

[0021] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model.

[0022] Figure 2 It is a schematic diagram of the setting between the inner pipe and the two liquid baffle plates in the present utility model.

[0023] Figure 3 It is a three-dimensional schematic diagram of the liquid dropping tray in an embodiment of the present utility model.

[0024] Figure 4 It is Figure 1 The enlarged view at A in

[0025] Figure 5 It is a schematic diagram of the setting between the sealing piston and the counterweight block in an embodiment of the present utility model.

[0026] Figure 6 It is a schematic diagram (partial) of the setting between the base frame and the driving mechanism in an embodiment of the present utility model.

[0027] Annotation of reference numerals: 1 - base frame, 2 - liquid tank, 3 - sealing piston, 4 - counterweight, 5 - scale rod, 6 - upper limit boss, 7 - insertion post, 8 - infusion tube, 9 - inner penetrating tube, 10 - liquid blocking piece, 11 - liquid outlet hole, 12 - clamp, 13 - methanol fuel supply pipeline, 14 - liquid dropping tray, 15 - preparation cylinder, 16 - exhaust nozzle, 17 - sealing valve, 18 - sealing gasket, 19 - infusion port, 20 - liquid injection port, 21 - receiving cylinder, 22 - telescopic member, 23 - lower limit boss, 24 - driving mechanism, 2401 - U-shaped member, 2402 - support member, 2403 - driving member, 2404 - rotating shaft, 2405 - gear, 2406 - sliding groove, 2407 - rack, 25 - sealing ring, 26 - limiting block, 27 - graduation line, 28 - pointer. Detailed implementation manner

[0028] The present application will be further described in detail below with reference to the accompanying drawings. It is necessary to point out here that the following specific implementation manners are only used to further illustrate the present application and cannot be construed as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0029] Please refer to Figures 1 to 3 , a detection device for a methanol fuel supply pipeline of a ship engine, including a base frame 1 and a clamp 12 provided on the base frame 1 for clamping the methanol fuel supply pipeline. The detection device further includes an inner penetrating tube 9 that can coaxially penetrate the pipeline. Two liquid blocking pieces 10 adapted to the inner diameter of the pipeline are coaxially penetrated on the inner penetrating tube 9, and sealing rings 25 are provided on both of the two liquid blocking pieces 10. Liquid outlet holes 11 are evenly distributed on the pipe section of the inner penetrating tube 9 between the two liquid blocking pieces 10, and one end of the inner penetrating tube 9 facing the pipeline is closed;

[0030] A liquid tank 2 is provided on the base frame 1. A suitable sealing piston 3 is provided in the liquid tank 2, and a counterweight 4 and a scale rod 5 are provided on the sealing piston 3. A liquid injection port 20 and an infusion port 19 are provided on the liquid tank 2. An infusion tube 8 is provided between the infusion port 19 and the end of the inner penetrating tube 9 away from the clamp 12. The infusion tube 8 is a flexible tube;

[0031] The detection device also includes a preparation tube 15 and a receiving tube 21 which are coaxial with the clamped and fixed pipeline. The inner diameters of the preparation tube 15 and the receiving tube 21 are consistent with the inner diameter of the pipeline, and the lengths of the preparation tube 15 and the receiving tube 21 are greater than the distance between the two liquid blocking plates 10. The preparation tube 15 is located between the inner tube 9 and the clamp 12, and the receiving tube 21 is located on the side of the clamp 12 away from the preparation tube 15. The preparation tube 15 and the receiving tube 21 can be moved away from / closer to the clamp 12 to respectively abut against the two ends of the pipeline. The preparation tube 15 is provided with an exhaust nozzle 16, and the exhaust nozzle 16, the injection port 20 and the infusion port 19 are all provided with a sealing valve 17.

[0032] It should be noted that the clamp 12 is a prior art, and it only needs to be able to clamp and fix the methanol fuel supply pipeline. Therefore, the present application does not limit or elaborate on the specific structure of the clamp 12.

[0033] First, move and adjust the preparation cylinder 15, the receiving cylinder 21 and the far - away fixture 12 according to the actual length of the methanol fuel supply pipeline to be detected, so that the distance between the preparation cylinder 15 and the receiving cylinder 21 meets the requirements of pipeline clamping operation. Then, clamp and fix the pipeline through the fixture 12, and move and adjust the preparation cylinder 15 and the receiving cylinder 21 closer to the fixture 12 so that the end parts of the preparation cylinder 15 and the receiving cylinder 21 are respectively in close contact with both ends of the pipeline. Next, inject an appropriate amount of detection liquid (the detection liquid can be water or other harmless liquids) into the liquid tank 2 through the liquid injection port 20. During the injection process, the sealing valve 17 on the liquid infusion port 19 is closed. After the injection is completed, close the sealing valve on the liquid injection port 20. Subsequently, the inner - penetrating pipe 9 moves closer to the pipeline until it drives both baffle plates 10 to move and stop in the preparation cylinder 15. Open the sealing valves 17 on the liquid infusion port 19 and the exhaust nozzle 16. Under the action of its own gravity and the gravity of the counterweight 4, the sealing piston 3 moves downward along the tank body of the liquid tank 2, so as to send the detection liquid into the inner - penetrating pipe 9 and discharge it through the liquid outlet holes 11 to fill the space formed between the barrel wall of the preparation cylinder 15 and the two baffle plates 10. When the detection liquid overflows from the exhaust nozzle 16, it means that the space is filled with the detection liquid to form a liquid column. This liquid column simulates a unit length of methanol fuel. At this time, close the sealing valve 17 on the exhaust nozzle 16. Since the gravity of the sealing piston 3 itself and the gravity of the counterweight 4 are constant, the liquid column pressure is constant. This hydraulic pressure simulates the pressure when methanol fuel flows in the pipeline. Record the position of the scale rod 5 on the upper edge of the tank body of the liquid tank 2 at this time, which is recorded as the initial position. After the preparatory work is completed, the inner - penetrating pipe 9 moves uniformly towards the pipeline at a certain speed, driving the liquid column to pass through the whole pipeline. This speed simulates the flow rate of methanol fuel in the pipeline. A liquid column of a unit length passes through the pipeline at a constant pressure and a constant speed. When the liquid column leaks at the leak point of the pipeline during passing through the pipeline, the sealing piston 3 moves downward to pump and supply the detection liquid, and the liquid column pressure remains constant. When both baffle plates 10 move into the receiving cylinder 21, the inner - penetrating pipe 9 stops, and the test of this pipeline is completed. By observing the distance difference between the position of the scale rod 5 on the upper edge of the tank body of the liquid tank 2 after the test and the initial position and multiplying it by the inner cavity area of the liquid tank 2, the leakage accurate value can be obtained, and the leakage amount of a liquid column of a unit length flowing through this pipeline at a certain pressure and speed can be obtained, so as to accurately evaluate the leakage condition of the pipeline and provide an accurate basis for whether to repair the pipeline or directly replace it with a new pipeline in the follow - up.

[0034] Further, an upper limit boss 6 and a lower limit boss 23 for respectively limiting the upper and lower extreme positions of the sealing piston 3 are provided on the inner wall of the liquid tank 2.

[0035] Further, sealing gaskets 18 are provided at the ends of the preparation cylinder 15 and the receiving cylinder 21 that are in contact with the pipeline ends. By setting the sealing gaskets 18, the sealing performance when the preparation cylinder 15 and the receiving cylinder 21 are in contact with the pipeline ends is ensured, and the leakage of the liquid column is prevented from causing errors in the test results.

[0036] Further, a liquid dropping tray 14 for receiving the test liquid is provided at a position below the base frame 1. The leaked detection liquid drips into the liquid dropping tray 14 for collection. After the pipeline detection is completed, the inner pipe 9 continues to move to drive the two liquid blocking pieces 10 out of the receiving cylinder 21, eliminating the liquid column and dropping it into the liquid dropping tray 14, so as to avoid the detection liquid from polluting the device and the surrounding environment.

[0037] Please refer to Figure 1 and Figure 4 In an embodiment of the present invention, a limit block 26 is provided on the liquid tank 2. The scale rod 5 can slide through the limit block 26. A scale line 27 is provided on the scale rod 5. A pointer 28 for indicating the value of the scale line 27 is provided on the limit block 26. By using the pointer 28 to indicate the difference between the values before and after the test of the scale line 27, the downward movement distance of the sealing piston 3 can be obtained conveniently and accurately. The purpose of setting the limit block 26 is to prevent the sealing piston 3 from deflecting and driving the scale rod 5 to move, resulting in the pointer 28 being unable to normally indicate the value of the scale line 27.

[0038] Please refer to Figure 1 In an embodiment of the present invention, both the preparation cylinder 15 and the receiving cylinder 21 are moved and adjusted closer to / away from the fixture 12 through a telescopic member 22. The telescopic member 22 can be a hydraulic rod, an electric telescopic rod, etc., which belongs to the prior art, so it will not be limited and described in detail here.

[0039] Please refer to Figure 5 In an embodiment of the present invention, the counterweight 4 is provided with a variety of different mass specifications. At least two insertion columns 7 are provided on the sealing piston 3. The counterweight 4 is provided with insertion holes that are adapted to and correspond one-to-one with the insertion columns 7. By selecting counterweights 4 of different masses, different pressure states of the liquid column can be simulated. The greater the mass of the counterweight 4, the greater the pressure of the formed liquid column, so as to meet diverse simulation detection requirements.

[0040] Please refer to Figure 1 and Figure 6In one embodiment of the utility model, the detection device also includes a driving mechanism 24 for inserting the inner tube 9 into the pipeline, the driving mechanism 24 includes a U-shaped member 2401 and a support member 2402 arranged on the U-shaped member 2401, the inner tube 9 is arranged on the support member 2402, and the inner tube 9 is coaxial with the preparation tube 15 / the receiving tube 21, a rack 2407 and two slide grooves 2406 are provided on the base frame 1, the direction of the rack 2407 and the two slide grooves 2406 are consistent with the direction of the pipeline after clamping and fixing, the two ends of the U-shaped member 2401 can be slidably stuck in the two slide grooves 2406 respectively, a rotatable shaft 2404 and a driving member 2403 for driving the shaft 2404 to rotate are provided on the U-shaped member 2401, a gear 2405 meshing with the rack 2407 is passed through the shaft 2404, and the driving member 2403 is a variable speed servo motor.

[0041] In this embodiment, the rotating shaft 2404 is driven to rotate by the driving member 2403. Under the meshing action of the gear 2405 and the rack 2407, the rotating shaft 2404 drives the U-shaped member 2401 to slide along the two slide grooves 2406, thereby driving the inner tube 9 to coaxially penetrate the pipeline and reset. The speed of the inner tube 9 penetrating the pipeline is adjusted by adjusting the output shaft speed of the driving member 2403, that is, the flow rate of the unit length of the liquid column through the pipeline is adjusted, thereby meeting various simulation detection needs.

[0042] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A detection device for a methanol fuel supply pipeline of a ship engine, comprising a base frame (1) and a fixture (12) provided on the base frame (1) for clamping the methanol fuel supply pipeline, characterized in that, The detection device further includes an inner pipe (9) that can be coaxially inserted into the pipeline. Two liquid blocking sheets (10) adapted to the inner diameter of the pipeline are coaxially arranged on the inner pipe (9), and sealing rings (25) are provided on both of the two liquid blocking sheets (10). Liquid outlet holes (11) are evenly distributed on the pipe section of the inner pipe (9) between the two liquid blocking sheets (10). A liquid tank (2) is provided on the base frame (1). A suitable sealing piston (3) is provided in the liquid tank (2), and a counterweight block (4) and a scale rod (5) are provided on the sealing piston (3). A liquid injection port (20) and a liquid infusion port (19) are provided on the liquid tank (2). A liquid infusion pipe (8) is provided between the liquid infusion port (19) and the end of the inner pipe (9) away from the clamp (12). The detection device further includes a preparation cylinder (15) and a receiving cylinder (21) coaxial with the clamped pipeline. The inner diameters of the preparation cylinder (15) and the receiving cylinder (21) are the same as the inner diameter of the pipeline, and the lengths of the preparation cylinder (15) and the receiving cylinder (21) are both greater than the distance between the two liquid blocking sheets (10). The preparation cylinder (15) is located between the inner pipe (9) and the clamp (12), and the receiving cylinder (21) is located on the side of the clamp (12) away from the preparation cylinder (15). The preparation cylinder (15) and the receiving cylinder (21) can move closer to / away from the clamp (12) for adjustment to respectively abut against both ends of the pipeline. An exhaust nozzle (16) is provided on the preparation cylinder (15), and sealing valves (17) are provided on the exhaust nozzle (16), the liquid injection port (20), and the liquid infusion port (19).

2. The methanol fuel supply pipeline detection device for a marine engine according to claim 1, characterized in that, A limit block (26) is provided on the liquid tank (2). The scale rod (5) can slide through the limit block (26). Scale lines (27) are provided on the scale rod (5), and a pointer (28) for indicating the value of the scale lines (27) is provided on the limit block (26).

3. The methanol fuel supply pipeline detection device for a marine engine according to claim 1, characterized in that, Upper limit bosses (6) and lower limit bosses (23) for respectively limiting the upper and lower extreme positions of the sealing piston (3) are provided on the inner wall of the liquid tank (2).

4. The methanol fuel supply pipeline detection device for a marine engine according to claim 1, characterized in that, The detection device further includes a driving mechanism (24) for inserting the inner pipe (9) into the pipeline. The driving mechanism (24) includes a U-shaped member (2401) and a support member (2402) provided on the U-shaped member (2401). The inner pipe (9) is provided on the support member (2402), and the inner pipe (9) is coaxial with the preparation cylinder (15) / receiving cylinder (21). A rack (2407) and two sliding grooves (2406) are provided on the base frame (1). Two ends of the U-shaped member (2401) are respectively slidably clamped in the two sliding grooves (2406). A rotatable rotating shaft (2404) and a driving member (2403) for driving the rotation of the rotating shaft (2404) are provided on the U-shaped member (2401). A gear (2405) meshing with the rack (2407) is sleeved on the rotating shaft (2404). The driving member (2403) is a variable-speed servo motor.

5. The methanol fuel supply pipeline detection device for a marine engine according to claim 1, characterized in that, The counterweight block (4) is provided with a plurality of different mass specifications, the sealing piston (3) is provided with at least two insertion columns (7), and the counterweight block (4) is provided with insertion holes adapted to and corresponding to the insertion columns (7).

6. The methanol fuel supply pipeline detection device for a marine engine according to claim 1, characterized in that, The ends of the preparation tube (15) and the receiving tube (21) that abut against the end of the pipeline are both provided with sealing gaskets (18).

7. The methanol fuel supply pipeline detection device for a marine engine according to claim 1, wherein The preparation tube (15) and the receiving tube (21) are both adjusted to move away from or towards the clamp (12) through a telescopic member (22).

8. The methanol fuel supply pipeline detection device for a ship engine according to claim 1, characterized in that, The base frame (1) is provided with a liquid drop tray (14) for receiving the test liquid at a position below the clamp (12).

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