Homogenizing pouring device for melting titanium alloy intermediate alloy

Abstract

The utility model belongs to the metal smelting technical field, concretely relates to homogenization pouring device for titanium alloy intermediate alloy smelting, including sprue cup, the top of sprue cup is hinged and is fixed with main sealing cover, the main sealing cover's axle core place through -type fixedly connected with injection material pipe, the injection material pipe top periphery fixedly connected with the gradually expanding mouth, the main sealing cover top detachable type connection has the vice sealing cover, the vice sealing cover sealed cover in gradually expanding mouth outside, the utility model discloses a main sealing cover, vice sealing cover carry out the sealing to sprue cup, avoid titanium alloy melt / liquid long -term exposure in air, prevent oxidation reaction produces, improve the quality of casting melt, and vice sealing cover can dismantle, and it is convenient to inject liquid material to injection material mouth, and liquid material is further dispersed evenly to the conical inner wall of sprue cup by conical disc, along the stable slide of inner wall of sprue cup, avoid the splashing phenomenon caused by direct vertical impact, guarantee the stability of pouring process.

Description

Technical Field

[0001] This utility model belongs to the field of metal smelting technology, specifically relating to a homogenization casting device for melting titanium alloy intermediate alloys. Background Technology

[0002] According to CN214920266U, a technical solution for a casting device for molten titanium alloy is disclosed, which mainly includes a pouring cup, a transition sleeve, a guide pipe, and a drain pipe. The diameter of the upper end of the pouring cup is larger than the diameter of its lower end. However, this solution still has the following problems in practical applications: Based on the connection method, functional requirements and structural rationality described in the claims and drawings, the solution as a whole presents an open and continuous structural feature, that is, the pouring cup is not equipped with an effective sealing device during the titanium alloy melt casting operation.

[0003] However, molten titanium and its alloys exhibit extremely high chemical reactivity: in their high-temperature liquid state, titanium readily reacts violently with oxygen and nitrogen in the air, generating brittle oxides (such as TiO2) and nitrides (such as TiN). This not only significantly reduces the mechanical properties of the castings (such as tensile strength and elongation) but also causes defects such as subcutaneous porosity and inclusions, severely impacting product quality. Furthermore, when molten titanium alloys are exposed to the atmosphere for extended periods, the oxide film formed on the melt surface may rupture due to thermal stress and be drawn into the melt's interior, causing secondary contamination. The original open structure clearly cannot meet this critical process requirement. Utility Model Content

[0004] The purpose of this invention is to provide a homogenization casting device for melting titanium alloy intermediate alloys. The device seals the pouring cup with a main sealing cover and a secondary sealing cover, preventing the titanium alloy melt / liquid from being exposed to air for a long time, thus preventing oxidation and improving casting quality. The secondary sealing cover is removable, which facilitates the injection of liquid material into the pouring port. The liquid material is further evenly dispersed by the conical disk onto the conical inner wall of the pouring cup and slides smoothly down the inner wall of the pouring cup, avoiding splashing caused by direct vertical impact and ensuring the stability of the casting process.

[0005] The specific technical solution adopted by this utility model is as follows: A homogenization casting apparatus for melting titanium alloy master alloys includes a pouring cup. A main sealing cover is hinged to the top of the pouring cup. A filling tube is fixedly connected through the axis of the main sealing cover. A gradually expanding opening is fixedly connected to the top periphery of the filling tube. A secondary sealing cover is detachably connected to the top of the main sealing cover. The secondary sealing cover seals and covers the outside of the gradually expanding opening. A conical disk is fixedly connected to the bottom of the main sealing cover via a conical rod. The conical surface of the conical disk faces upward and is coaxially arranged with the filling tube. The diameter of the bottom surface of the conical disk is larger than the inner diameter of the constricted opening of the pouring cup.

[0006] Both the main sealing cover and the secondary sealing cover have internal heat insulation layers.

[0007] The main sealing cover is provided with a retaining ring at the top and outside the gradually expanding opening, and the secondary sealing cover is formed with the retaining ring through the sealing ring on the inner wall to form an interference fit.

[0008] The secondary sealing cover is symmetrically fixedly connected to support plates on both sides, and the main sealing cover is symmetrically fixedly connected to a screw tube on the top.

[0009] Each of the support plates is rotatably connected to a screw rod in the middle. The screw rod is embedded in the screw tube and engages with the threaded end of its inner wall.

[0010] The top of the main sealing cover is also symmetrically connected with vents, and the two vents and the two screw tubes are arranged in a cross pattern.

[0011] The technical effects achieved by this utility model are as follows: the main sealing cover and the secondary sealing cover seal the pouring cup, avoiding prolonged exposure of the titanium alloy melt / liquid to air, preventing oxidation reaction, improving casting quality, and the secondary sealing cover can be removed, making it easy to inject liquid material into the pouring port. The liquid material is further evenly dispersed by the conical disk onto the conical inner wall of the pouring cup, and slides smoothly down the inner wall of the pouring cup, avoiding splashing caused by direct vertical impact, and ensuring the stability of the pouring process. Attached Figure Description

[0012] Figure 1 This is an overall view of the casting device provided in an embodiment of this utility model; Figure 2 This is a structural separation diagram of the pouring cup after it has been opened, provided in an embodiment of this utility model; Figure 3 This is a side view showing the structure after the pouring cup has been opened, according to an embodiment of this utility model. Figure 4 This is a separate illustration of the conical disk provided in an embodiment of this utility model.

[0013] The attached diagram lists the components represented by each number as follows: 1. Pour cup; 101. Main sealing cap; 102. Injection pipe; 103. Gradually expanding mouth; 104. Secondary sealing cap; 105. Conical disc; 106. Conical rod; 107. Support plate; 108. Screw; 109. Screw tube; 110. Retaining ring; 111. Vent. Detailed Implementation

[0014] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0015] The homogenization casting device for titanium alloy intermediate alloy melting provided by this utility model is based on the structure of patent CN214920266U, mainly improving the structure of the pouring cup; the structure and implementation of the components other than the pouring cup in the original patent remain unchanged, and the specific structure can be found in the embodiment of the original patent.

[0016] like Figures 1-4 As shown, a homogenizing casting apparatus for melting titanium alloy intermediate alloys includes a pouring cup 1. A main sealing cover 101 is hinged to the top of the pouring cup 1. A filling tube 102 is fixedly connected through the axial center of the main sealing cover 101. A flared opening 103 is fixedly connected to the top periphery of the filling tube 102. A secondary sealing cover 104 is detachably connected to the top of the main sealing cover 101, sealing and covering the outside of the flared opening 103. A conical disc 105 is fixedly connected to the bottom of the main sealing cover 101 via a conical rod 106. The conical surface of the conical disc 105 faces upward and is coaxially arranged with the filling tube 102. The bottom diameter of the conical disc 105 is larger than the constricted inner diameter of the pouring cup 1. Both the main sealing cover 101 and the secondary sealing cover 104 have heat insulation layers inside. The main sealing cover 101 has a retaining ring 110 on the top and outside the gradually expanding opening 103. The secondary sealing cover 104 has an interference fit with the retaining ring 110 through the sealing ring on the inner wall. The secondary sealing cover 104 has support plates 107 symmetrically fixedly connected to both sides. The main sealing cover 101 has a screw tube 109 symmetrically fixedly connected to the top. The support plates 107 are rotatably connected to the middle of each support plate 107. The screw tube 108 is embedded in the screw tube 109 and then has a threaded fit with the end of its inner wall. The top of the main sealing cover 101 is also symmetrically connected to a vent nozzle 111. The two vent nozzles 111 and the two screw tubes 109 are arranged in a cross pattern.

[0017] According to the above structure, the main sealing cover 101 and the secondary sealing cover 104 are nested together and placed on the top of the pouring cup 1 to seal it, thus isolating the outside air from contacting the high-temperature titanium liquid and preventing oxidation reaction. The main sealing cover 101 is provided with a sealing ring around its periphery, which can cooperate with the sealing groove pre-set around the periphery of the pouring cup 1 to enhance airtightness. It is fixed to the pouring cup 1 by fastening bolts. During maintenance and cleaning, the main sealing cover 101 can be rotated and opened by removing the fastening bolts. Furthermore, when the main sealing cap 101 is in a closed state, liquid metal is injected into the injection pipe 102. The flared opening 103 increases the diameter of the injection pipe 102 to prevent leakage. The injected liquid flows downward along the injection pipe 102 and is guided by the conical disk 105. The conical disk 105 is set with its conical surface facing upward and is arranged coaxially with the injection pipe 102. It can evenly disperse the liquid onto the conical inner wall of the pouring cup 1, so that the liquid slides smoothly down the inner wall of the pouring cup 1, avoiding splashing caused by direct vertical impact. This ensures the stability and consistency of the pouring process. The conical disk 105 can be made of heat-resistant materials such as molybdenum-based alloys and tungsten-lanthanum alloys. It can also be coated with DLC coating, diamond coating, etc., as required to further enhance its heat resistance and lubrication performance. Furthermore, the bottom of the main sealing cover 101 is fixedly connected to the conical disk 105 via a conical rod 106 to ensure the positioning of the conical disk 105. The conical surfaces of the two conical rods 106 face each other, that is, they both face the highest point of the conical disk 105, further reducing their influence on the flow of liquid material. The constriction diameter of the pouring cup 1 is smaller than the outer diameter of the bottom surface of the conical disk 105, which can ensure that the liquid material of the conical disk 105 will not fall directly into the constriction of the pouring cup 1, but will first fall onto the conical inner wall of the pouring cup 1 and flow downward along its inner wall. The heat insulation interlayer provided inside the main sealing cover 101 and the secondary sealing cover 104 can be made of materials such as ceramic fiber blanket, aluminum silicate needled blanket, and aerogel board, which can reduce the heat transfer to the outside, maintain the temperature of the titanium liquid, and at the same time reduce the temperature of its own top surface. Furthermore, a retaining ring 110 is provided at the top of the main sealing cover 101 outside the flared opening 103, and the secondary sealing cover 104 forms an interference fit with the retaining ring 110 through a sealing ring on the inner wall. At the same time, the support plates 107 on both sides of the secondary sealing cover 104 are first embedded into the corresponding threaded tubes 109 by screws 108 and then fastened to the threaded knobs at the end of the inner wall of the tube. The secondary sealing cover 104 can be disassembled by operating the screws 108 to rotate forward and backward. It can maintain a seal during casting and remain open during material injection. Furthermore, the two vents 111 can be connected to an external air supply and extraction system via air pipes. The two vents 111 work together: one quickly removes air and harmful gases from the casting cavity through extraction to inhibit the oxidation of the titanium liquid; the other continuously fills in inert gases such as argon to form a positive pressure protective layer and improve the metallurgical quality of the casting.

[0018] The working principle of this utility model is as follows: through the nested combination design of the main sealing cover 101 and the secondary sealing cover 104, the top of the pouring cup 1 is reliably sealed, isolating the outside air from contact with the high-temperature titanium liquid and preventing oxidation reaction. The main sealing cover 101 is provided with a sealing ring around its periphery, which precisely matches the pre-set sealing groove of the pouring cup 1 to improve the sealing performance; and it is also firmly connected to the pouring cup 1 by a fastening bolt. During maintenance and cleaning, the fastening bolt can be removed to open the main sealing cover 101.

[0019] Furthermore, when the main sealing cap 101 is in the closed state, liquid metal is injected through the injection pipe 102, and the flaring port 103 enlarges the diameter of the injection pipe 102 to prevent leakage. The injected liquid flows down along the injection pipe 102 and is guided by the conical disk 105, which faces upward and is coaxially arranged with the injection pipe 102, to evenly disperse the liquid onto the conical inner wall of the pouring cup 1, allowing it to slide smoothly down the inner wall and avoiding splashing caused by vertical impact, thus ensuring a stable and consistent pouring process. The conical disk 105 can be made of heat-resistant materials such as molybdenum-based alloys or tungsten-lanthanum alloys, and can also be coated with DLC or diamond coatings as needed to further improve heat resistance and lubrication performance.

[0020] Furthermore, the bottom of the main sealing cover 101 is fixedly connected to the conical disk 105 via a conical rod 106 to ensure the positioning of the conical disk 105. The two conical rods 106 face each other towards the highest point of the conical disk 105 to minimize the obstruction to the flow of liquid. Since the constriction diameter of the pouring cup 1 is smaller than the outer diameter of the bottom surface of the conical disk 105, the liquid must first fall onto the inner wall of the pouring cup 1 before flowing downward. The heat insulation layer inside the main sealing cover 101 and the secondary sealing cover 104 can be made of materials such as ceramic fiber blanket, aluminum silicate needled blanket, or aerogel board to reduce heat loss, maintain the temperature of the titanium liquid, and reduce the temperature of its own top surface.

[0021] Furthermore, the top of the main sealing cover 101 is provided with a retaining ring 110 on the outside of the gradually expanding opening 103. The secondary sealing cover 104 forms an interference fit with the retaining ring 110 through the inner wall sealing ring. The support plates 107 on both sides of the secondary sealing cover 104 are first embedded into the screw tube 109 by the screw 108, and then tightened with the threaded knob at the end of its inner wall. The secondary sealing cover 104 can be disassembled by operating the screw 108 in both forward and reverse directions. It maintains a seal during casting and can be opened flexibly during injection. In addition, the two vents 111 are connected to an external air supply and extraction system, which work together: one extracts and discharges air and harmful gases in the casting cavity to inhibit the oxidation of titanium liquid; the other fills in inert gases such as argon to form a positive pressure protective layer and comprehensively improve the metallurgical quality of the casting.

[0022] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A homogenizing casting apparatus for melting titanium alloy master alloys, comprising a pouring cup (1), characterized in that: The top of the pouring cup (1) is hinged to a main sealing cap (101), and a material injection pipe (102) is fixedly connected through the axis of the main sealing cap (101). A gradually expanding mouth (103) is fixedly connected to the top periphery of the material injection pipe (102). A secondary sealing cap (104) is detachably connected to the top of the main sealing cap (101). The secondary sealing cap (104) seals and covers the outside of the gradually expanding mouth (103). A conical disc (105) is fixedly connected to the bottom of the main sealing cap (101) through a conical rod (106). The conical disc (105) has its conical surface facing upward and is coaxially arranged with the material injection pipe (102). The bottom diameter of the conical disc (105) is larger than the inner diameter of the constricted mouth of the pouring cup (1).

2. The homogenizing casting apparatus for melting titanium alloy master alloys according to claim 1, characterized in that: Both the main sealing cover (101) and the secondary sealing cover (104) are equipped with heat insulation interlayers.

3. The homogenizing casting apparatus for melting titanium alloy master alloys according to claim 2, characterized in that: The main sealing cover (101) is provided with a retaining ring (110) on top and outside the flared opening (103), and the secondary sealing cover (104) is formed with the retaining ring (110) through the sealing ring on the inner wall.

4. The homogenizing casting apparatus for melting titanium alloy master alloys according to claim 1, characterized in that: The secondary sealing cover (104) is symmetrically fixedly connected to support plates (107) on both sides, and the main sealing cover (101) is symmetrically fixedly connected to a screw tube (109) on the top.

5. The homogenizing casting apparatus for melting titanium alloy master alloys according to claim 4, characterized in that: Each of the support plates (107) is rotatably connected to a screw (108) in the middle. The screw (108) is embedded in the screw tube (109) and then engages with the threaded end of its inner wall.

6. The homogenizing casting apparatus for melting titanium alloy master alloys according to claim 5, characterized in that: The top of the main sealing cover (101) is also symmetrically connected with vents (111), and the two vents (111) and the two screw tubes (109) are arranged in a cross pattern.

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