A riser leak detection apparatus

Abstract

The utility model discloses a kind of liquid lift pipe leak detection devices, including base, placing table is arranged on the base, the placing table is formed into positioning groove by concave downwards, the base is uniformly provided with guide rod upwards, the end of the guide rod is provided with thread, further including upper pressing plate, the upper pressing plate is provided with perforation opposite the guide rod, the middle of the upper pressing plate is provided with air hole, connector is provided at the air hole, the other end of the connector is connected with mould water testing machine through trachea, nut is provided on the upper pressing plate, the nut is connected with the thread of guide rod, synchronous rotating mechanism is provided between the nut, the surface of the upper pressing plate and positioning groove opposite liquid lift pipe is provided with sealing ring. The present liquid lift pipe leak detection device has the advantages of accurate detection, simple operation and convenient use.

Description

Technical Field

[0001] This utility model relates to the field of riser tube detection technology, and in particular to a riser tube leak detection device. Background Technology

[0002] In traditional leak testing of riser tubes, the method typically involves clamping the riser tube onto a hydraulic clamping machine, applying soapy water to its surface, and then venting air through the tube's interior. The presence of bubbles indicates a leak. Another method involves submerging the riser tube in water for the venting test. Both methods have significant drawbacks: firstly, the required testing equipment is expensive and requires a large workspace; secondly, both methods require wetting the riser tube, which is problematic given its high-temperature operating environment and its status as a consumable component. The riser tube needs to be baked dry before it can be placed back into a high-temperature environment for reheating. This ensures that the temperature difference between the riser tube and the molten aluminum is not too large. This process takes a long time and is quite complicated. Thirdly, adding soapy water is not very effective in detecting leaks in the riser tube. Although the riser tube is rotating, the bubbles produced when it leaks are small and disappear quickly. Soapy water needs to be added continuously throughout the process to ensure proper observation. The riser tube itself is also quite long, with traditional riser tubes being about one meter long, which also increases the difficulty of manual observation. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this patent application is how to provide a leak detection device for riser tubes that is accurate in detection, simple in operation, and convenient in use.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A leak detection device for a riser pipe includes a base with a placement platform on it. The placement platform is recessed downward to form a positioning groove. Guide rods are evenly arranged upward on the base, and the ends of the guide rods are threaded. The device also includes an upper pressure plate with a through hole facing the guide rods. An air vent is provided in the middle of the upper pressure plate, and a connector is provided at the air vent. The other end of the connector is connected to a mold testing machine via an air pipe. Nuts are provided on the upper pressure plate and are threadedly connected to the guide rods. A synchronous rotation mechanism is provided between the nuts. Sealing rings are provided on the surfaces of the upper pressure plate and the positioning groove facing the riser pipe.

[0006] In use, the riser pipe is placed in the positioning groove, and a sealing ring is placed between them. The upper pressure plate is then placed on top of the riser pipe, with another sealing ring placed on top. Driven by the synchronous rotation mechanism, the nut and guide rod are connected, causing the upper pressure plate to move downwards synchronously and pressurize the riser pipe, thus sealing its interior. The mold testing machine can then circulate air through the air pipe and maintain pressure once it reaches the required level. During this process, the mold testing machine itself can monitor for any pressure drop, ensuring accurate testing. After testing, the pressure is released and the material is replaced. This device provides a testing fixture for the riser pipe, ensuring the stability of the testing process. Simultaneously, the mold testing machine's functions provide pressure and pressure holding monitoring, which is more accurate than observing bubbles in water, preventing the riser pipe from being submerged and protecting it from damage.

[0007] Preferably, the synchronous rotation mechanism includes a sleeve disposed on the upper surface of the upper pressure plate, the sleeve being coaxially disposed with the through hole, a pulley being rotatably connected inside the sleeve, a rotating shaft being disposed on the pulley, a clearance hole being vertically disposed on the rotating shaft, a nut being fixedly installed in the clearance hole, the pulleys being connected to each other by a synchronous belt, and a power mechanism being disposed on the synchronous belt.

[0008] In this way, the power mechanism can drive the synchronous belt to rotate, thereby realizing the synchronous rotation of the four pulleys, which in turn is converted into the synchronous rotation of the four nuts. This ensures that the guide rod can be raised and lowered synchronously, and ensures the horizontal state of the upper pressure plate when it presses the riser pipe.

[0009] Preferably, the power mechanism is a stepper motor mounted on the upper pressure plate, the output shaft of the stepper motor is connected to a power wheel, and the power wheel is connected to the synchronous belt drive.

[0010] In this way, the stepper motor can be precisely controlled to achieve stable lifting and lowering of the upper pressure plate, avoiding air leakage caused by incomplete positioning.

[0011] Preferably, a retaining ring is provided on the lower surface of the upper pressure plate.

[0012] In this way, the retaining ring can provide horizontal support to the top of the riser tube, ensuring the stability of the riser tube during testing.

[0013] Preferably, the connector is a quick-release connector.

[0014] This allows for a quick connection between the airway and the upper pressure plate.

[0015] In summary, this liquid riser leak detection device has the advantages of accurate detection, simple operation, and convenient use. Attached Figure Description

[0016] Figure 1This is a structural schematic diagram of a liquid riser leak detection device according to the present invention.

[0017] Figure 2 for Figure 1 A sectional view.

[0018] Figure 3 for Figure 2 A magnified structural diagram of point A in the middle.

[0019] Figure 4 for Figure 1 A breakdown diagram (lifting tube not shown).

[0020] Figure 5 This is a schematic diagram of the synchronous rotation mechanism. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that directional terms such as "upper," "lower," "top," and "bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0022] like Figure 1-5 As shown, a leak detection device for a riser pipe includes a base 1, on which a placement platform 11 is provided. The placement platform is recessed downward to form a positioning groove 12. Guide rods 13 are evenly arranged upward on the base. The ends of the guide rods are threaded. The device also includes an upper pressure plate 14. The upper pressure plate has a through hole 15 facing the guide rod. An air vent 16 is provided in the middle of the upper pressure plate. A connector 17 is provided at the air vent. The other end of the connector is connected to a mold testing machine through an air pipe 18. A nut 19 is provided on the upper pressure plate. The nut is threadedly connected to the guide rod. A synchronous rotation mechanism is provided between the nuts. A sealing ring 2 is provided on the surface of the upper pressure plate and the positioning groove facing the riser pipe.

[0023] In use, the riser pipe is placed in the positioning groove, and a sealing ring is placed between them. The upper pressure plate is then placed on top of the riser pipe, with another sealing ring placed on top. Driven by the synchronous rotation mechanism, the nut and guide rod are connected, causing the upper pressure plate to move downwards synchronously and pressurize the riser pipe, thus sealing its interior. The mold testing machine can then circulate air through the air pipe and maintain pressure once it reaches the required level. During this process, the mold testing machine itself can monitor for any pressure drop, ensuring accurate testing. After testing, the pressure is released and the material is replaced. This device provides a testing fixture for the riser pipe, ensuring the stability of the testing process. Simultaneously, the mold testing machine's functions provide pressure and pressure holding monitoring, which is more accurate than observing bubbles in water, preventing the riser pipe from being submerged and protecting it from damage.

[0024] In implementation, the synchronous rotation mechanism includes a sleeve 21 disposed on the upper surface of the upper pressure plate. The sleeve is coaxially arranged with the perforation. A pulley 22 is rotatably connected inside the sleeve. A rotating shaft 23 is disposed on the pulley. A clearance hole 24 is vertically provided on the rotating shaft. The nut is fixedly installed in the clearance hole. The pulleys are connected by a synchronous belt 25. A power mechanism is also disposed on the synchronous belt. In this way, the power mechanism can drive the synchronous belt to rotate, thereby realizing the synchronous rotation of the four pulleys, which is ultimately converted into the synchronous rotation of the four nuts. This ensures that they can be raised and lowered synchronously on the guide rod, ensuring the horizontal state of the upper pressure plate when pressing the riser pipe.

[0025] In practice, the power mechanism is a stepper motor 26 mounted on the upper pressure plate. The output shaft of the stepper motor is connected to a power wheel 27, which is connected to the synchronous belt drive. This allows for precise control of the stepper motor, enabling stable lifting and lowering of the upper pressure plate and preventing air leakage caused by incomplete positioning.

[0026] Specifically, it also includes a PLC controller, which is connected to the stepper motor and can precisely control the lifting and lowering of the upper pressure plate.

[0027] In practice, a retaining ring 28 is provided on the lower surface of the upper pressure plate. In this way, the retaining ring can provide horizontal support for the top of the riser tube, ensuring the stability of the riser tube during testing.

[0028] In practice, the connector is a quick-release connector. This allows for a rapid connection between the air tube and the upper pressure plate.

[0029] Finally, it should be noted that those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A leak detection device for a riser pipe, characterized in that, The device includes a base with a placement platform on it. The placement platform is recessed downwards to form a positioning groove. Guide rods are evenly arranged upwards on the base, and the ends of the guide rods are threaded. The device also includes an upper pressure plate with a through hole facing the guide rods. An air vent is provided in the middle of the upper pressure plate, and a connector is provided at the air vent. The other end of the connector is connected to a mold testing machine via an air pipe. Nuts are provided on the upper pressure plate and are threadedly connected to the guide rods. A synchronous rotation mechanism is provided between the nuts. Sealing rings are provided on the surfaces of the upper pressure plate and the positioning groove facing the riser pipe.

2. The leak detection device for a riser pipe according to claim 1, characterized in that, The synchronous rotation mechanism includes a sleeve disposed on the upper surface of the upper pressure plate. The sleeve is coaxially disposed with the through hole. A pulley is rotatably connected inside the sleeve. A rotating shaft is disposed on the pulley. A clearance hole is vertically disposed on the rotating shaft. A nut is fixedly installed in the clearance hole. The pulleys are connected by a synchronous belt. A power mechanism is also disposed on the synchronous belt.

3. The leak detection device for a riser pipe according to claim 2, characterized in that, The power mechanism is a stepper motor mounted on the upper pressure plate. The output shaft of the stepper motor is connected to a power wheel, and the power wheel is connected to the synchronous belt drive.

4. The leak detection device for a riser pipe according to claim 3, characterized in that, A retaining ring is provided on the lower surface of the upper pressure plate.

5. A leak detection device for a riser pipe according to claim 4, characterized in that, The connector is a quick-release connector.

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