Composite material casting equipment

Abstract

The utility model discloses composite material casting equipment, which relates to the technical field of material preparation and comprises a mother pipe, a traction mechanism, a closed melting furnace, a closed casting furnace, a mold and a crystallizer, the melting furnace and the casting furnace are communicated through a first channel which can be opened and closed, an inner cavity of the casting furnace is communicated with a vacuum unit, and an inner cavity of the melting furnace is communicated with first gas supply equipment; the mold is hollow, and the mold is provided with a flow inlet for communicating an inner cavity of the casting furnace with an inner cavity of the mold; the traction mechanism is connected with the main pipe and drives the main pipe to penetrate through the casting furnace and the mold.

Description

Technical Field

[0001] The utility model relates to the technical field of material preparation, in particular to a composite material casting device. Background Art

[0002] Chemical production processes often involve various corrosive media, which can cause serious corrosion to heat exchange tubes, thereby affecting the service life and heat exchange efficiency of the heat exchange tubes, increasing equipment maintenance costs, and may even cause production interruptions.

[0003] In order to solve the corrosion problem, chemical companies usually take a variety of measures. Among them, the use of corrosion-resistant materials to make heat exchange tubes is one of the common methods, such as using materials with good corrosion resistance such as titanium. However, the thermal conductivity of titanium is about 1 / 4 of nickel, 1 / 5 of iron, and 1 / 14 of aluminum, while the thermal conductivity of various titanium alloys is about 50% lower than that of titanium. Therefore, the low efficiency of titanium tube heat exchangers has become an important factor restricting corporate costs. If materials with higher heat transfer coefficients can be selected to replace traditional titanium tubes, their heat transfer efficiency can be greatly increased, thereby reducing energy consumption. However, traditional materials with relatively high heat transfer coefficients, such as copper and aluminum, are not suitable for use as heat exchange tubes alone due to their corrosion resistance.

[0004] To address these issues, existing technologies have designed composite pipes with inner and outer layers made of different materials. However, these pipes are typically produced through drawing, resulting in large and numerous gaps. Because the pipes are composite materials, chemical gases can enter these gaps during use, further increasing the risk of electrical corrosion. Therefore, there is an urgent need to develop composite casting equipment to improve the quality of composite materials. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a composite material casting device, which improves the casting quality of the composite material.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A composite material casting device comprises: a mother pipe, a traction mechanism, a sealed melting furnace and a casting furnace, a mold and a crystallizer installed in the casting furnace; the melting furnace and the casting furnace are connected via a first openable and closable channel, the inner cavity of the casting furnace is connected to a vacuum unit, and the inner cavity of the melting furnace is connected to a first gas supply device; the mold is hollow, and the mold is provided with an inlet connecting the inner cavity of the casting furnace with the inner cavity of the mold; the traction mechanism is connected to the mother pipe, and drives the mother pipe to pass through the casting furnace and the mold.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] The molten liquid from the melting furnace flows into the casting furnace, passing through the mold inlet and into the mold. It then fills the area between the outer wall of the mother tube and the inner wall of the mold, flowing down the mold wall to the crystallizer. The crystallizer cools the molten liquid. When the temperature drops to the crystallization point of the molten metal, it rapidly crystallizes within this area, forming a cladding layer on the surface of the mother tube. A traction mechanism pulls the mother tube forward, continuously forming a composite tube.

[0010] This technical solution creates a vacuum within the entire equipment by enclosing the casting furnace and installing a vacuum pump. This prevents air from entering the furnace, which could cause chemical reactions such as oxidation between the mother pipe and the molten liquid at high temperatures. A first air supply device is installed in the melting furnace, allowing for adjustable and controllable pressure within the equipment to maintain a stable molten liquid level. This not only ensures overall equipment safety and prevents splashing at high temperatures, but also ensures that the pressure forces the molten liquid to flow toward the mold inlet, resulting in a smoother casting and crystallization process. This casting equipment significantly reduces cracks in composite pipes, thereby improving product quality.

[0011] As a preferred solution, the mother tube is hollow and further includes a second gas supply device which is in communication with the inner cavity of the mother tube.

[0012] As a preferred solution, it further comprises a center sleeve installed on the casting furnace, wherein the center sleeve is hollow and coaxial with the mold.

[0013] As a preferred solution, it further comprises a stopper rod movably connected to the melting furnace, and the stopper rod can be inserted into the melting furnace to block the channel.

[0014] As a preferred solution, the first gas supply device and the second gas supply device supply inert gas.

[0015] As a preferred solution, the melting furnace is further equipped with a stirring unit.

[0016] As a preferred solution, the mother tube is a titanium tube, and the melting furnace is filled with molten aluminum.

[0017] As a preferred solution, the traction speed of the traction mechanism is 20 mm / min-100 mm / min. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the overall structure of composite material casting equipment in some embodiments;

[0019] Figure 2 for Figure 1 A is a partial enlarged view.

[0020] In the above drawings:

[0021] 1. Melting furnace; 2. Casting furnace; 3. Mother pipe; 4. Traction mechanism; 5. Mold; 6. Top cover; 7. First channel; 8. Vacuum unit; 9. First air supply device; 10. Inlet; 11. Second air supply device; 12. Center sleeve; 13. Valve structure; 14. Stirring unit; 15. Cladding layer. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; the structures described in various embodiments can be freely combined without any conflict in structure or principle.

[0023] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., etc., are used solely for distinction and description, and should not be construed as indicating or implying relative importance.

[0025] The utility model proposes a composite material casting equipment, such as Figure 1 As shown, it includes: a melting furnace 1, a casting furnace 2, a mother tube 3, a traction mechanism 4, a mold 5 and a crystallizer.

[0026] The melting furnace 1 melts the metal inside it from a solid into a molten liquid; the molten liquid enters the casting furnace 2 for casting. Both the melting furnace 1 and the casting furnace 2 are designed to be sealed. For example, each has an inner cavity and an open top. Both the melting furnace 1 and the casting furnace 2 are equipped with a top cover 6. A conventional sealing structure is provided between the top cover 6 and the furnace body to ensure that the melting furnace 1 and the casting furnace 2 are sealed. The melting furnace 1 and the casting furnace 2 are connected by a first channel 7. The first channel 7 is equipped with an openable and closable valve structure 13. When the valve structure 13 is opened, the molten liquid can enter the casting furnace 2 through the first channel 7. The inner cavity of the casting furnace 2 is connected to a vacuum unit 8, which includes a vacuum pump and a first pipeline. The two ends of the first pipeline are respectively connected to the vacuum pump and the inner cavity of the casting furnace 2. Starting the vacuum pump on demand can form a vacuum / negative pressure state in the casting furnace 2 to prevent air from entering and oxidizing the mother pipe 3 / molten liquid; the inner cavity of the melting furnace 1 is connected to a first gas supply device 9, which includes an air pump and a second pipeline. The two ends of the second pipeline are respectively connected to the air pump and the melting furnace 1.

[0027] Combine Figure 2 As shown, a hole is provided at the bottom of the casting furnace 2, and the mold 5 is installed on the casting furnace 2 and its top end passes through the hole of the casting furnace 2 and is inserted into the inner cavity of the casting furnace 2; the mold 5 is set to a hollow structure, and the top of the mold 5 is provided with an inlet 10 connected to the inner cavity of the mold 5; preferably, the mold 5 is made of graphite, which is itself resistant to high temperatures.

[0028] The crystallizer (not shown in the figure) is installed on the casting furnace 2 and arranged below the mold 5. The structure of the crystallizer itself is existing technology and will not be described in detail here.

[0029] The mother tube 3 passes through the inner cavity of the casting furnace 2, the mold 5, and the crystallizer from top to bottom, with a gap between the mother tube 3 and the mold 5. A traction mechanism 4 is also provided. For example, the traction mechanism 4 includes two sets of roller pullers, which are distributed on the upper and lower sides of the casting furnace 2. On the one hand, the two sets of roller pullers clamp the outer wall of the mother tube 3 and drive the mother tube 3 to move continuously from top to bottom. On the other hand, the upper and lower pullers clamp the tube to keep the entire tube aligned with the same centerline.

[0030] The working process of this casting equipment is:

[0031] The molten liquid from the melting furnace 1 flows into the casting furnace 2, passing through the inlet 10 of the mold 5 and into the interior of the mold 5. It then fills the gap between the mother tube 3 and the wall of the mold 5, flowing down the inner wall of the mold 5 to reach the crystallizer. Rapidly flowing cooling water in the crystallizer cools the molten liquid. When the temperature drops to the crystallization point of the molten metal, it rapidly crystallizes within this area, forming a cladding layer 15 that covers the surface of the mother tube 3. Simultaneously, a pulling mechanism 4 pulls the mother tube 3 forward, continuously forming the composite pipe.

[0032] This technical solution seals the entire apparatus to prevent air from entering the interior of the casting furnace 2. A vacuum pump is added to the casting furnace 2 to maintain a slight negative pressure inside the casting furnace 2, preventing chemical reactions such as oxidation between the mother pipe 3 and the molten liquid at high temperatures. A first gas supply device 9 is installed in the melting furnace 1, making the overall pressure inside the apparatus adjustable and controllable, ensuring that the molten liquid remains at a stable level. This not only ensures the overall safety of the apparatus and prevents liquid splashing at high temperatures, but also allows the molten liquid to flow toward the inlet 10 of the mold 5 under pressure, making the casting crystallization process smoother. This composite material manufacturing equipment replaces existing drawing methods, reduces cracks in composite pipes, and thus improves product quality.

[0033] As a preferred solution, the mother tube 3 is set as a titanium tube and the melting furnace 1 is set with aluminum liquid to cast into a composite tube.

[0034] As a preferred solution, the traction speed of the traction mechanism 4 is set to 20 mm / min-100 mm / min.

[0035] As a preferred solution, the first gas supply device 9 is configured to inject an inert gas (such as nitrogen) into the melting furnace 1 to prevent oxidation of the melt.

[0036] As a preferred solution, Figure 1 As shown, the mother tube 3 is hollow and further includes a second gas supply device 11, which includes an air pump and a third pipeline. The two ends of the third pipeline are respectively connected to the air pump and the inner cavity of the mother tube 3. The second gas supply device 11 can fill the mother tube 3 with an inert gas (such as nitrogen) to prevent the inner wall of the mother tube 3 from undergoing an oxidation reaction at high temperature, thereby ensuring the quality of the product inside the tube body.

[0037] As a preferred solution, Figure 1 As shown, it also includes a center sleeve 12 installed on the casting furnace 2, and the center sleeve 12 is hollow for inserting the mother tube 3; the center sleeve 12 is coaxial with the channel of the casting furnace 2 and the mold 5, and plays a centering role, so that the mother tube 3 is always kept in the center position in the mold 5 during the casting process, ensuring that the inner wall of the mold 5 and the outer wall of the mother tube 3 are at equal distances, so that the cladding layer 15 can have a uniform thickness.

[0038] As a preferred solution, Figure 1 As shown, the valve structure 13 includes a stopper rod movably connected to the melting furnace 1 in an upper and lower direction, and a drive mechanism (not shown) for moving the stopper rod. Before casting begins, the bottom end of the stopper rod is inserted into the inner bottom of the melting furnace 1, blocking the right end of the first passage 7, thereby closing the first passage 7. The stopper rod isolates the melting furnace 1 from the casting furnace 2, preventing the molten liquid from prematurely entering the casting furnace 2.

[0039] As a preferred solution, Figure 1 and Figure 2 As shown, the melting furnace 1 is also equipped with a stirring unit 14. For example, the stirring unit 14 comprises an electromagnetic stirring mechanism mounted on the bottom of the casting furnace 2. The structure of this stirring mechanism is conventional and will not be described in detail here. The electromagnetic stirring mechanism stirs the molten liquid within the casting furnace 2 to prevent stratification of the alloy melt due to differences in density and chemical composition, which could lead to uneven composition of the melt.

Claims

1. A composite material casting device, characterized in that: include: A mother pipe (3), a traction mechanism (4), a sealed melting furnace (1) and a casting furnace (2), a mold (5) installed in the casting furnace (2), and a crystallizer; the melting furnace (1) and the casting furnace (2) are connected through a first openable and closable channel (7); the inner cavity of the casting furnace (2) is connected to a vacuum unit (8), and the inner cavity of the melting furnace (1) is connected to a first gas supply device (9); the mold (5) is hollow, and the mold (5) is provided with an inlet (10) connecting the inner cavity of the casting furnace (2) with the inner cavity of the mold (5); the traction mechanism (4) is connected to the mother pipe (3) to drive the mother pipe (3) to pass through the casting furnace (2) and the mold (5).

2. A composite material casting device according to claim 1, characterized in that: The mother pipe (3) is hollow and further comprises a second gas supply device (11) which is in communication with the inner cavity of the mother pipe (3).

3. A composite material casting device according to claim 1 or 2, characterized in that: It also includes a center sleeve (12) installed on the casting furnace (2), and the center sleeve (12) is hollow and coaxial with the mold (5).

4. A composite material casting device according to claim 3, characterized in that: It also comprises a stopper rod movably connected to the melting furnace (1), and the stopper rod can be inserted into the melting furnace (1) to block the channel.

5. The composite material casting equipment according to claim 2, characterized in that: The first gas supply device (9) and the second gas supply device (11) supply inert gas.

6. A composite material casting device according to claim 5, characterized in that: The melting furnace (1) is also equipped with a stirring unit (14).

7. A composite material casting device according to claim 1 or 2, characterized in that: The mother tube (3) is a titanium tube, and the melting furnace (1) contains molten aluminum.

8. The composite material casting equipment according to claim 5, characterized in that: The traction speed of the traction mechanism (4) is 20 mm / min-100 mm / min.

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