Adjustable cover plate for directional melting teeming furnace

Abstract

The utility model belongs to directional smelting pouring furnace technical field, concretely relates to a kind of adjustable cover plate of directional smelting pouring furnace;Including heat insulation cover, heat insulation cover is connected with the rotary mechanism on furnace top by the support arm of adjustable length;Lifting mechanism is provided between rotary mechanism and furnace top;Rotary mechanism is used to drive support arm with heat insulation cover horizontal movement, lifting mechanism is used to drive rotary mechanism and its connected support arm with heat insulation cover up and down movement;A kind of adjustable cover plate of directional smelting pouring furnace provided by the utility model, the device can be aimed at different height inductive coil, adjust the use height, it is convenient and fast, device flexibility is stronger;When component wear, it can be individually disassembled and repaired or replaced, easy to operate;Selected heat insulation material is mica plate and graphite carbon felt, heat insulation effect is good, low in price, and it is strong in economic practicality.

Description

Technical Field

[0001] This utility model belongs to the technical field of directional melting casting furnaces, specifically relating to an adjustable cover plate for a directional melting casting furnace. Background Technology

[0002] Directional solidification technology has developed alongside the advancements in high-temperature alloys. Its principle involves forcibly establishing a temperature gradient in a specific direction between the solidified metal and the undried melt during solidification, causing the melt to solidify in the direction opposite to the heat flow, thus obtaining columnar crystals with a specific orientation. Directional solidification effectively controls the grain orientation of the solidified structure, eliminates transverse grain boundaries, and improves the longitudinal mechanical properties of the material. Currently, directional solidification technology is widely used in high-temperature alloy casting and metallurgical refining.

[0003] Directional solidification is a strong solidification process. In a directional solidification apparatus, a heat-insulating plate separates the upper heating zone and the lower cooling zone, creating a one-dimensional temperature gradient from top to bottom along the axial direction of the high-temperature alloy. The specific principle is as follows: the mold shell is placed on a water-cooled crystallizer and heated and held at a specific temperature in the induction coil heating zone. Then, the high-temperature alloy, melted and heated to a certain temperature in the melting chamber crucible, is poured into the mold shell in the heating zone. The water-cooled crystallizer, along with the mold shell, is slowly pulled out of the induction coil heating zone to the lower cooling zone for forced cooling, achieving a unidirectional solidification structure to improve alloy properties.

[0004] During directional solidification, one of the important factors affecting the quality of the final product is the temperature field of the induction coil heating zone. Whether the temperature field is uniform and stable directly affects the mold shell temperature and cooling rate, which has a decisive impact on the metallurgical quality of the casting. Therefore, maintaining a uniform and stable temperature field in the induction coil heating zone is the key to the directional solidification process throughout the entire directional melting and casting process.

[0005] The induction coil heating zone of the directional melting casting furnace is responsible for heating and maintaining the temperature of the mold shell. It needs to maintain a stable temperature throughout the melting, casting, and drawing processes. However, since the heating zone is not completely enclosed, heat radiation and loss are inevitable, leading to an uneven and unstable temperature field. Therefore, measures need to be taken to avoid this phenomenon. The lower part of the heating zone is insulated using a water-cooled crystallizer and heat insulation plates. During melting and casting, molten metal is poured into the upper part, hence the presence of a molten metal inlet. This inlet is prone to heat loss, causing localized temperature drops, which in turn makes the temperature field uneven and unstable, affecting the final casting condition.

[0006] This invention aims to improve the heat loss problem at the upper feed inlet of the heating zone, and also to meet the usage requirements of different height induction heating zones for modules of different sizes and induction coil sizes. Utility Model Content

[0007] This invention aims to solve the problem of heat loss at the upper feed inlet of the heating zone and to meet the usage requirements of induction heating zones at different heights.

[0008] This utility model provides the following technical solution: an adjustable cover plate for a directional melting casting furnace, including a heat-insulating cover plate, the heat-insulating cover plate being connected to a rotating mechanism located on the furnace top via a support arm with adjustable length; a lifting mechanism is provided between the rotating mechanism and the furnace top; the rotating mechanism is used to drive the support arm to move the heat-insulating cover plate horizontally, and the lifting mechanism is used to drive the rotating mechanism and its connected support arm to move the heat-insulating cover plate up and down.

[0009] Furthermore, the support arm includes an upper connecting shaft, a connecting sleeve, and a lower connecting shaft; the upper connecting shaft and the lower connecting shaft are inserted into both sides of the connecting sleeve, and a locking component for fixing the insertion length is provided between the upper connecting shaft and the connecting sleeve; the upper connecting shaft is connected to the rotating mechanism; and the lower connecting shaft is connected to the heat insulation cover plate.

[0010] Furthermore, the support arm avoids the top of the furnace body, and the lower connecting shaft is connected to the heat insulation cover plate through a horizontally extending connecting seat.

[0011] Furthermore, the heat insulation cover includes a lower heat insulation pad and an upper connecting plate, and the heat insulation pad can cover the top surface of the furnace body to seal the feed inlet.

[0012] Furthermore, the heat insulation pad is made of graphite carbon felt, and the connecting plate is made of mica board.

[0013] Furthermore, the connecting sleeve is provided with locating holes that are spaced apart along the axial direction and penetrate radially. The upper connecting shaft and the lower connecting shaft are provided with insert holes that penetrate radially. The insert holes of the upper connecting shaft and / or the lower connecting shaft are aligned with the locating holes of the connecting sleeve and inserted into the double-ended stud for fixation.

[0014] Furthermore, the rotating mechanism includes a pneumatic motor, the lifting mechanism includes a cylinder, the cylinder body is mounted on the furnace top, the cylinder body supports the housing of the pneumatic motor, and the rotating shaft of the pneumatic motor is connected to the upper connecting shaft.

[0015] Furthermore, the connecting seat includes a base plate and a stiffening plate. The base plate is fixed to the bottom end of the lower connecting shaft, and the stiffening plate connects the top surface of the base plate and the lower connecting shaft.

[0016] Furthermore, the heat insulation cover and the base plate of the connecting seat are connected by bolts.

[0017] Compared with the prior art, the advantages of this utility model are: This utility model provides an adjustable cover plate for a directional melting casting furnace. This device can adjust the operating height for induction coils of different heights, which is convenient, quick, and highly flexible. When components are worn, they can be disassembled individually for repair or replacement, making operation simple. The selected heat insulation materials are mica board and graphite carbon felt, which have good heat insulation effect, low price, and are economical and practical.

[0018] The adjustable cover plate of the directional melting and casting furnace of this utility model can effectively prevent heat loss from the upper part of the heating zone, and ensure that the temperature field is uniform and stable throughout the melting, casting and drawing processes. It can effectively improve the metallurgical defects of castings caused by improper temperature field control, improve the casting qualification rate, shorten the production cycle, reduce the waste of manpower, material resources, raw materials and production cycle, and save economic costs. Attached Figure Description

[0019] Figure 1 A schematic diagram of an adjustable cover plate for a directional melting casting furnace; Figure 2 for Figure 1 View from AA.

[0020] In the diagram: 1-Upper connecting shaft; 2-Connecting sleeve; 3-Double-headed stud; 4-Lower connecting shaft; 5-Connecting seat; 6-Connecting seat; 7-Heat insulation pad; 8-Lifting mechanism; 9-Rotating mechanism; 10-Furnace top; 11-Feed inlet; 12-Heat insulation plate; 13-Mold shell; 14-Induction heating zone; 15-Cooling zone; 16-Water-cooled crystallizer; Y-Pull-out direction. Detailed Implementation

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] like Figure 1 As shown: An adjustable cover plate for a directional melting casting furnace includes a heat-insulating cover plate, which is connected to a rotating mechanism 9 located on the furnace top via a support arm with adjustable length; a lifting mechanism 8 is provided between the rotating mechanism 9 and the furnace top; the rotating mechanism 9 is used to drive the support arm to move the heat-insulating cover plate horizontally, and the lifting mechanism 8 is used to drive the rotating mechanism 9 and the support arm connected thereto to move the heat-insulating cover plate up and down.

[0023] The support arm includes an upper connecting shaft 1, a connecting sleeve 2, and a lower connecting shaft 4; the upper connecting shaft 1 and the lower connecting shaft 4 are inserted into both sides of the connecting sleeve 2, and a locking assembly for fixing the insertion length is provided between the upper connecting shaft 1 and the lower connecting shaft 4 and the connecting sleeve 2; the upper connecting shaft 1 is connected to the rotating mechanism 9; and the lower connecting shaft 4 is connected to the heat insulation cover plate.

[0024] The connecting sleeve 2 is provided with positioning holes that are spaced apart along the axial direction and penetrate radially. The number and spacing of the positioning holes can be adjusted according to the actual situation. The upper connecting shaft 1 and the lower connecting shaft 4 are provided with radially penetrating insertion holes. The insertion holes of the upper connecting shaft 1 and / or the lower connecting shaft 4 are aligned with the positioning holes of the connecting sleeve 2 and inserted into the double-ended studs 3 for fixation to prevent the structure from falling off. The height of the heat insulation cover can be adjusted by adjusting the insertion length of the upper connecting shaft 1 and the lower connecting shaft 4 with the connecting sleeve 2.

[0025] The support arm avoids the top of the furnace body, reducing the high temperature of the furnace body from baking the support arm and extending its service life. The lower connecting shaft 4 is connected to the heat insulation cover plate through the horizontally extending connecting seat 5.

[0026] The heat insulation cover consists of a lower heat insulation pad 7 and an upper connecting plate 6. The heat insulation pad 7 covers the top surface of the furnace body to seal the feed inlet. The heat insulation pad 7 is made of graphite carbon felt, and the connecting plate 6 is made of mica board, which serves to block heat radiation from the upper part of the heating zone to prevent heat loss. The selected heat insulation materials are mica board and graphite carbon felt, which have good heat insulation effect, low price, and strong economic practicality.

[0027] like Figure 2 As shown: The connecting seat 5 includes a base plate and a stiffening plate. The base plate is fixed to the bottom end of the lower connecting shaft 4, and the stiffening plate connects the top surface of the base plate and the lower connecting shaft 4. The connecting plate 6 of the heat insulation cover and the base plate of the connecting seat 5 are connected by bolts, and the heat insulation cover can be replaced separately after wear.

[0028] The rotating mechanism 9 includes a pneumatic motor, and the lifting mechanism 8 includes a cylinder. The cylinder body is mounted on the furnace top and supports the housing of the pneumatic motor. The rotating shaft of the pneumatic motor is connected to the upper connecting shaft 1.

[0029] When using this device, adjust the insertion length of the connecting sleeve 2 with the upper connecting shaft 1 and the lower connecting shaft 4 to find a suitable operating height. The rotating mechanism 9 drives the heat insulation cover plate to move above the furnace inlet 11. Then, the lifting mechanism 8 drives the heat insulation cover plate to descend and cover the inlet 11, continuously preventing heat loss from the induction zone. Before pouring, the lifting mechanism 8 drives the support arm to rise and lift the heat insulation cover plate. The rotating mechanism 9 drives the support arm to rotate, causing the heat insulation cover plate to rotate. At this time, the furnace inlet 11 is open, and the molten metal can be poured into the mold shell. After pouring is completed, the heat insulation cover plate is reset to continue to prevent heat loss and maintain a uniform and stable temperature field.

[0030] With a defined service life, the adjustable cover plate of the directional melting casting furnace only needs periodic inspection for damage to its components, or replacement of accessories after a certain period, ensuring safe and reliable operation of the device and effectively reducing replacement and maintenance costs. For induction coils of different sizes, simply changing the insertion length of the connecting sleeve 2 with the upper connecting shaft 1 and the lower connecting shaft 4 can meet the heat insulation requirements of induction coils of different heights, making operation simple and convenient.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An adjustable cover plate for a directional melting casting furnace, characterized in that: It includes a heat insulation cover plate, which is connected to a rotating mechanism (9) located on the furnace top via a support arm with adjustable length; a lifting mechanism (8) is provided between the rotating mechanism (9) and the furnace top; the rotating mechanism (9) is used to drive the support arm to move the heat insulation cover plate horizontally, and the lifting mechanism (8) is used to drive the rotating mechanism (9) and its connected support arm to move the heat insulation cover plate up and down.

2. The adjustable cover plate of a directional melting casting furnace according to claim 1, characterized in that: The support arm includes an upper connecting shaft (1), a connecting sleeve (2), and a lower connecting shaft (4); the upper connecting shaft (1) and the lower connecting shaft (4) are inserted into both sides of the connecting sleeve (2), and a locking assembly for fixing the insertion length is provided between the upper connecting shaft (1) and the lower connecting shaft (4) and the connecting sleeve (2); the upper connecting shaft (1) is connected to the rotating mechanism (9); and the lower connecting shaft (4) is connected to the heat insulation cover plate.

3. The adjustable cover plate of a directional melting casting furnace according to claim 2, characterized in that: The support arm is positioned above the furnace body, and the lower connecting shaft (4) is connected to the heat insulation cover plate via a horizontally extending connecting seat (5).

4. An adjustable cover plate for a directional melting casting furnace according to any one of claims 1 to 3, characterized in that: The heat insulation cover plate includes a lower heat insulation pad (7) and an upper connecting plate (6). The heat insulation pad (7) can cover the top surface of the furnace body to seal the feed inlet.

5. An adjustable cover plate for a directional melting casting furnace according to claim 4, characterized in that: The heat insulation pad (7) is a graphite carbon felt, and the connecting plate (6) is a mica plate.

6. An adjustable cover plate for a directional melting casting furnace according to claim 3, characterized in that: The connecting sleeve (2) is provided with positioning holes that are spaced apart along the axial direction and penetrate radially. The upper connecting shaft (1) and the lower connecting shaft (4) are provided with insertion holes that penetrate radially. The insertion holes of the upper connecting shaft (1) and / or the lower connecting shaft (4) are aligned with the positioning holes of the connecting sleeve (2) and inserted into the double-ended stud (3) for fixation.

7. An adjustable cover plate for a directional melting casting furnace according to claim 1, characterized in that: The rotating mechanism (9) includes a pneumatic motor, and the lifting mechanism (8) includes a cylinder. The cylinder body is installed on the furnace top, and the cylinder body supports the housing of the pneumatic motor. The rotating shaft of the pneumatic motor is connected to the upper connecting shaft (1).

8. An adjustable cover plate for a directional melting casting furnace according to claim 3, characterized in that: The connecting seat (5) includes a base plate and a stiffening plate. The base plate is fixed to the bottom end of the lower connecting shaft (4), and the stiffening plate connects the top surface of the base plate and the lower connecting shaft (4).

9. An adjustable cover plate for a directional melting casting furnace according to claim 8, characterized in that: The heat insulation cover and the base plate of the connecting seat (5) are connected by bolts.

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