A liquid lift

Abstract

The utility model relates to a liquid lift pipe technical field especially, relates to a liquid lift pipe, including the pipe body, the bottom end inner chamber of pipe body is provided with the rectifier filter assembly for eliminating splashing and intercepting impurity and air bubble in the liquid inlet process, the rectifier filter assembly includes the ceramic filter screen of transverse setting in the pipe body inner diameter section, and the bottom surface one side of ceramic filter screen is provided with the ceramic limit block for preventing filter screen from falling off under the negative pressure backflow condition. The utility model discloses through ceramic limit block, effectively guarantee its when facing the negative pressure back absorption of aluminium liquid pressure relief, and ceramic limit block can stop filter screen, effectively solve the risk of filter screen easy to fall off, and simultaneously, adopt the design of split type ceramic limit block and the clamping groove, help to solve the thermal expansion and contraction problem of full ceramic structure under high temperature, guarantee locking force, avoid the pipe orifice burst caused by rigid fault, prolong the service life.

Description

Technical Field

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

[0002] In the low-pressure casting production of aluminum alloy wheels, the riser pipe is a key piping component connecting the holding furnace and the mold. Molten aluminum enters the mold through the riser pipe under gas pressure. To ensure the density and mechanical properties of the casting, a filter device is usually installed at the inlet end of the riser pipe to intercept oxide inclusions.

[0003] Existing methods often employ a riser pipe, such as the one disclosed in CN201380283Y. While these pipes offer improvements in material corrosion resistance, they still suffer from significant drawbacks in filter installation and fluid control. Firstly, existing filter screens are typically placed directly on the steps inside the pipe opening, lacking an effective reverse locking mechanism. When casting is completed and pressure is released for reflux, the rapid descent of molten aluminum inside the pipe generates a powerful negative pressure, easily causing the filter screen to be pulled off or overturned, leading to filter failure or even causing it to fall into the furnace and contaminate the molten aluminum. Utility Model Content

[0004] The purpose of this utility model is to solve the problem of loose fixation and easy blockage in the prior art, and to propose a liquid riser tube.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A riser pipe includes a pipe body, and a rectifier filter assembly is provided in the inner cavity at the bottom end of the pipe body for eliminating splashing and intercepting impurities and air bubbles during the liquid inlet process. The rectifier filter assembly includes a ceramic filter screen arranged laterally at the inner diameter section of the pipe body, and a ceramic limiting block is provided on one side of the bottom surface of the ceramic filter screen for preventing the filter screen from falling off under negative pressure backflow conditions.

[0006] Preferably, the inner wall of the tube is provided with a slot for installing the ceramic limiting block, and the ceramic limiting block is embedded in the slot to fill and limit the ceramic filter screen.

[0007] Preferably, the ceramic limiting block is a split fan-shaped structure, and multiple such blocks can be provided.

[0008] Preferably, the tube body, ceramic filter screen, and ceramic limiting block are all made of high-temperature resistant ceramic material.

[0009] Compared with the prior art, the present invention has the following advantages: 1. This utility model, through the cooperation of the ceramic limiting block and the slot, effectively ensures that when facing the negative pressure back suction of molten aluminum, the ceramic limiting block can block the filter screen, effectively solving the risk of the filter screen falling off.

[0010] 2. This utility model adopts a split ceramic limiting block and slot design, which helps to solve the problem of thermal expansion and contraction of the all-ceramic structure at high temperature, ensuring locking force and avoiding pipe opening cracking due to hard failure, thus extending service life. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a riser pipe proposed in this utility model; Figure 2 This is a schematic diagram of the internal structure of a riser tube according to the present invention. Figure 3 This is a schematic diagram of the rectifier and filter assembly mechanism of a riser pipe proposed in this utility model; Figure 4 This utility model provides a schematic diagram of a rectifier and filter assembly mechanism for a riser pipe, including a slot and a cross-sectional view of the ceramic filter screen. Figure 5 This is a schematic diagram of the rectifier filter assembly mechanism of the riser pipe proposed in this utility model, showing the positions of the slot, ceramic filter screen and ceramic limiting block.

[0012] In the diagram: 1. Pipe body; 2. Ceramic filter screen; 3. Ceramic limiting block. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0014] Reference Figures 1-5 A riser pipe includes a pipe body 1, which is preferably made of silicon carbide and is formed by casting, and has excellent heat resistance, shock resistance and non-wetting properties.

[0015] The bottom end of the tube 1 is provided with a rectifier filter assembly for eliminating splashing and intercepting impurities and bubbles during liquid inlet. In some embodiments, the rectifier filter assembly mainly consists of a ceramic filter screen 2 and a ceramic limiting block 3. The tube 1, the ceramic filter screen 2 and the ceramic limiting block 3 are all made of high-temperature resistant ceramic material.

[0016] The inner wall of the tube body 1 is designed as a smooth, straight cylindrical surface to reduce fluid resistance. The ceramic filter screen 2 is installed approximately 30mm-50mm from the bottom end of the tube body 1. The ceramic filter screen 2 is preferably made of 20ppi silicon carbide foam ceramic. The outer diameter of the ceramic filter screen 2 is designed to be slightly larger than the inner diameter of the tube body 1. It is fixed by an interference fit through mechanical pressing, relying on bridging force to resist the upward positive pressure impact of the molten aluminum.

[0017] A slot is provided on the inner wall of the tube body 1 for installing the ceramic limiting block 3. The ceramic limiting block 3 is embedded in the slot to fill and limit the ceramic filter screen 2. Figure 4 and Figure 5 As shown, the slot is composed of a first annular limiting groove for installing the ceramic filter screen 2 and a second annular limiting groove for installing the ceramic limiting block 3. The first annular limiting groove and the second annular limiting groove are concentrically distributed, and the second annular limiting groove is deeper than the first annular limiting groove.

[0018] The rectifier filter assembly includes a slot located at the front end of the inner wall of the tube body 1, such as... Figure 3 As shown, the ceramic limiting block 3 is designed as a split fan-shaped structure, and multiple fan-shaped blocks are set up to form a complete ring. When the ceramic part is heated and expands, the ceramic limiting block 3 expands and fills the slot, which helps to avoid damaging the gap expansion force on the tube body 1.

[0019] It should be noted that the specific model and specifications of the pore size of the tube body 1 and the ceramic filter screen 2 need to be selected and determined according to the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be elaborated here.

[0020] The functional principle of this utility model can be explained through the following operation methods: When the riser is put into use: The operator installs tube 1 onto the furnace cover, inserting its bottom end into the molten aluminum. When the filling process is completed and the pressure is released, the molten aluminum inside tube 1 falls back, creating a negative pressure. At this time, the ceramic limiting block 3 is locked in the slot, blocking the bottom edge of the ceramic filter screen 2 and preventing it from sliding out with the molten aluminum. The ceramic filter screen 2 remains in the working position, ensuring the stability of continuous production.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A riser tube, comprising a tube body (1), characterized in that, The bottom end cavity of the tube (1) is provided with a rectifier filter assembly for eliminating splashing and intercepting impurities and bubbles during liquid inlet. The rectifier filter assembly includes a ceramic filter screen (2) arranged laterally at the inner diameter section of the tube (1). A ceramic limiting block (3) is provided on one side of the bottom surface of the ceramic filter screen (2) to prevent the filter screen from falling off under negative pressure backflow conditions.

2. A riser pipe according to claim 1, characterized in that, The inner wall of the tube (1) is provided with a slot for installing the ceramic limiting block (3), and the ceramic limiting block (3) is embedded in the slot to fill and limit the ceramic filter screen (2).

3. A riser pipe according to claim 2, characterized in that, The ceramic limiting block (3) is a split fan-shaped structure, and multiple blocks can be provided.

4. A riser pipe according to claim 3, characterized in that, The tube body (1), ceramic filter screen (2) and ceramic limiting block (3) are all made of high-temperature resistant ceramic material.

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