Titanium ingot casting furnace

Abstract

A titanium ingot casting furnace relates to the technical field of titanium ingot casting and comprises a furnace body and a conveying device. Furnace doors are arranged at the two ends of the furnace body, and two isolation doors used for dividing an inner cavity of the furnace body into three independent areas are arranged in the furnace body at intervals; rails used for bearing the transfer trolley and conveying devices used for driving the transfer trolley are arranged in the three independent areas of the furnace body. The conveying device comprises a plurality of swing arms arranged at intervals in the length direction of the track, one end of each swing arm is rotationally connected with a friction wheel, the other end of each swing arm is correspondingly hinged to the inner bottom of the furnace body through a hollow hinge shaft, and a torsion spring enabling the swing arms to drive the friction wheels to deflect upwards is arranged on a shaft body of the hollow hinge shaft; a transmission shaft driven by a motor is movably inserted into the hollow hinge shaft and is in corresponding transmission connection with the friction wheel; the continuous casting device can be used for continuous casting and is high in production efficiency; the conveying devices in the three independent areas of the furnace body are independent of one another, and closing of the isolation doors is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of titanium ingot casting, in particular to a titanium ingot casting furnace. Background Art

[0002] As is known, titanium ingot casting needs to be carried out in a vacuum or inert atmosphere; in the casting process, the molten titanium liquid is prevented from being exposed to the air and reacting with oxygen to cause surface oxidation; at the same time, the quality and performance of titanium ingot castings can be significantly improved in a vacuum or inert atmosphere, and defects such as pores and inclusions can be reduced; the existing casting method is to first put the mold into the casting furnace, then evacuate the casting furnace, and cast; after casting, wait for the casting furnace to return to normal pressure before opening the casting furnace door and replacing the next mold, casting one furnace at a time, and the production efficiency is low;

[0003] A Chinese patent (publication number: CN113894266A) discloses a multi-chamber semi-continuous vacuum melting and casting furnace; the patent comprises a melting and casting chamber, a mold preheating / insulating chamber, a casting cooling chamber, etc., the upper and lower sides of the melting and casting chamber are respectively connected to the charging and measuring chamber and the mold preheating / insulating chamber, and the left and right sides of the mold preheating / insulating chamber are respectively connected to the mold chamber and the casting cooling chamber; a smelting device capable of horizontal movement is arranged in the melting and casting chamber, a lifting mechanism and a heating device with a water cooling ring are arranged in the mold preheating / insulating chamber, a mold moving trolley is arranged in the mold chamber, and a heating body is arranged in the casting cooling chamber; in actual use, it is found that since the mold moving trolley needs to move in the three independent chambers of the melting and casting chamber, the mold preheating / insulating chamber and the casting cooling chamber, the mold moving trolley needs to carry its own driving device and power source, resulting in a complex structure of the mold moving trolley and a high failure rate when running in a high temperature environment for a long time. Utility Model Content

[0004] In order to overcome the deficiencies in the background technology, the utility model discloses a titanium ingot casting furnace.

[0005] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0006] A titanium ingot casting furnace comprises a furnace body and a conveying device; furnace doors are provided at both ends of the furnace body, and two isolation doors are provided in the furnace body for dividing the internal cavity of the furnace body into three independent areas; tracks for carrying transfer carts and a conveying device for driving the transfer carts are provided in the three independent areas of the furnace body; the conveying device comprises a plurality of swing arms arranged at intervals along the length direction of the track, one end of the swing arm is rotatably connected to a friction wheel, and the other end is hinged to the bottom of the furnace body through a hollow hinge shaft, and the hollow hinge shaft body is provided with a torsion spring for causing the swing arm to drive the friction wheel to deflect upward; a transmission shaft driven by a motor is movably inserted in the hollow hinge shaft, and the transmission shaft is correspondingly connected to the friction wheel.

[0007] Preferably, a positioning assembly is provided in the middle area of ​​the furnace body, and the positioning assembly includes a conical hole provided at one end of the transfer trolley, and a telescopic cylinder inserted into the conical hole of the transfer trolley, and the cylinder body of the telescopic cylinder is correspondingly and firmly connected with the furnace body.

[0008] Preferably, arc-shaped guide plates are provided at the positions corresponding to the friction wheels at both ends of the transfer trolley.

[0009] Preferably, the multiple transmission shafts of the conveying device are connected by synchronous transmission of chains.

[0010] Preferably, the tops of the three independent areas of the furnace body are all provided with exhaust and intake pipes.

[0011] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0012] The utility model discloses a titanium ingot casting furnace with a simple structure and high production efficiency. During the production process, when the pressure reduction zone returns to normal pressure, the furnace door of the pressure reduction zone can be opened to allow the next transfer trolley to enter the pressure reduction zone for vacuum preparation. The casting zone always maintains a vacuum state, thereby achieving the purpose of continuous casting and effectively improving production efficiency.

[0013] The three independent areas of the furnace body are all provided with tracks for carrying the transfer trolley and a conveying device for driving the transfer trolley. The conveying devices in the three independent areas of the furnace body are independent of each other, and a gap can be reserved between two adjacent conveying devices, which will not be affected by the isolation door and will not affect the closing of the isolation door. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 is a schematic diagram of the structure of the transmission device;

[0016] Figure 3 It is a structural diagram of the positioning component.

[0017] In the figure: 1. furnace body; 2. conveying device; 2-1. swing arm; 2-2. friction wheel; 2-3. hollow hinge shaft; 2-4. transmission shaft; 3. furnace door; 4. isolation door; 5. transfer trolley; 6. track; 7. arc guide plate; 8. pipeline; 9. telescopic cylinder. DETAILED DESCRIPTION

[0018] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0019] Embodiment 1, in combination with Figures 1-2 A titanium ingot casting furnace comprises a furnace body 1 and a conveying device 2; furnace doors 3 are provided at both ends of the furnace body 1, and two isolation doors 4 are provided inside the furnace body 1 to divide the internal cavity of the furnace body 1 into three independent areas, that is, the furnace doors 3 at both ends of the furnace body 1 can be opened respectively to allow a transfer trolley 5 to carry a casting mold in and out of the furnace body 1, and after the furnace doors 3 at both ends of the furnace door 3 are closed, the inner cavity of the furnace body 1 forms a closed environment, so as to facilitate vacuum extraction and vacuum casting; the tops of the three independent areas of the furnace body 1 are provided with exhaust and air intake pipes 8;

[0020] The three independent areas of the furnace body 1 are respectively a depressurization area, a casting area and a boost area. The isolation door 4 can be a lifting door driven by a telescopic rod. After the two isolation doors 4 are closed, the casting area can be kept airtight, and the casting area can be evacuated through the corresponding pipeline 8, and the vacuum degree is less than or equal to 1Pa; after the transfer trolley 5 carries the casting mold into the depressurization area, the depressurization area can be evacuated through the corresponding pipeline 8, and then the isolation door 4 between the depressurization area and the casting area is opened, so that the transfer trolley 5 carries the casting mold into the casting area, and the isolation door 4 is closed, so that the depressurization area can be restored to normal pressure, and at the same time, the casting operation can be carried out and the boost area can be evacuated through the corresponding pipeline 8; after the boost area is evacuated, the isolation door 4 between the casting area and the boost area can be opened, so that the transfer trolley 5 carries the casting mold after casting into the boost area, and then the isolation door 4 between the casting area and the boost area is closed. After the isolation door 4 is closed, the boost area is restored to normal pressure, and the furnace door 3 of the boost area is opened, so that the transfer trolley 5 carries the casting mold out of the furnace body 1 to complete the casting operation;

[0021] It should be noted that during the production process, when the pressure reduction zone returns to normal pressure, the furnace door 3 of the pressure reduction zone can be opened to allow the next transfer trolley 5 to enter the pressure reduction zone for vacuum preparation. The casting zone is always kept in a vacuum state, thereby achieving the purpose of continuous casting and effectively improving production efficiency.

[0022] The three independent areas of the furnace body 1 are all provided with a track 6 for carrying the transfer trolley 5, and a conveying device 2 for driving the transfer trolley 5; the conveying device 2 comprises a plurality of swing arms 2-1 spaced apart along the length direction of the track 6, one end of the swing arm 2-1 is rotatably connected to a friction wheel 2-2, and the other end is correspondingly hinged to the bottom of the furnace body 1 through a hollow hinge shaft 2-3, and the hollow hinge shaft 2-3 is provided with a torsion spring for causing the swing arm 2-1 to drive the friction wheel 2-2 to deflect upward; a transmission shaft 2-4 driven by a motor is movably inserted in the hollow hinge shaft 2-3, and the transmission shaft 2-4 is correspondingly connected to the friction wheel 2-2 in a transmission manner;

[0023] It should be noted that, in order to reduce production costs, the multiple transmission shafts 2-4 of the conveying device 2 are connected by synchronous chain transmission, that is, the same conveying device 2 only needs one motor to drive all the friction wheels 2-2 of the conveying device 2; to adapt to high temperature environments, the friction wheels 2-2 and the corresponding transmission shafts 2-4 are also connected by chain transmission mechanisms; arc-shaped guide plates 7 are provided at the positions corresponding to the friction wheels 2-2 at both ends of the transfer trolley 5, that is, during the movement of the transfer trolley 5, the arc-shaped guide plates 7 can first press down the friction wheel 2-2 in the front of the walking direction, so as to avoid the end of the transfer trolley 5 from generating a large cutting force on the friction wheel 2-2, or the friction wheel 2-2 is stuck at the corresponding end of the transfer trolley 5, hindering the transfer trolley 5 from moving forward;

[0024] Working principle of the conveying device 2: the swing arm 2-1 can drive the friction wheel 2-2 to deflect upward under the action of the torsion spring, so that the friction wheel 2-2 is in friction contact with the bottom of the transfer trolley 5; the transmission shaft 2-4 driven by the motor drives the friction wheel 2-2, and then drives the transfer trolley 5 to move along the track 6 through the friction wheel 2-2; the conveying devices 2 in the three independent areas of the furnace body 1 are independent of each other, and a gap can be reserved between two adjacent conveying devices 2, which is not affected by the isolation door 4 and does not affect the closing of the isolation door 4.

[0025] In Example 2, it was found during use that although the conveying device 2 could drive the transfer trolley 5 to move along the track 6 in the three independent areas of the furnace body 1, and the transfer trolley 5 could stay in the corresponding independent area by closing the conveying device 2, the position of the transfer trolley 5 could not be accurately located, which caused difficulties for the casting operation. In order to solve the above technical problems, this embodiment is further improved;

[0026] Combined with Figure 3, a titanium ingot casting furnace, which is different from Example 1 in that, on the basis of Example 1, a positioning component is provided in the middle area of ​​the furnace body 1, that is, a positioning component is provided in the casting area, and the positioning component includes a conical hole provided at one end of the transfer trolley 5, and a telescopic cylinder 9 inserted into the conical hole of the transfer trolley 5, and the cylinder body of the telescopic cylinder 9 is correspondingly and tightly connected to the furnace body 1; a proximity switch for detecting the position of the transfer trolley 5 can be installed in the casting area, and the proximity switch can be triggered when the transfer trolley 5 reaches the predetermined position, and then the telescopic cylinder 9 is controlled to extend, so that the telescopic rod of the telescopic cylinder 9 is inserted into the conical hole of the transfer trolley 5, thereby achieving the purpose of accurately positioning the transfer trolley 5; according to needs, the protruding end of the telescopic rod of the telescopic cylinder 9 can be a pointed cone structure to facilitate plugging with the conical hole of the transfer trolley 5.

[0027] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A titanium ingot casting furnace, characterized in that: The invention comprises a furnace body (1) and a conveying device (2); furnace doors (3) are provided at both ends of the furnace body (1); two isolation doors (4) are provided at intervals in the furnace body (1) for dividing the internal cavity of the furnace body (1) into three independent areas; tracks (6) for carrying a transfer trolley (5) and a conveying device (2) for driving the transfer trolley (5) are provided in the three independent areas of the furnace body (1); the conveying device (2) comprises a plurality of tracks (6) arranged at intervals along the length direction of the track (6) A swing arm (2-1) is provided, one end of the swing arm (2-1) being rotatably connected to a friction wheel (2-2), and the other end of the swing arm (2-1) being correspondingly hinged to the bottom of the furnace body (1) via a hollow hinge shaft (2-3), and the hollow hinge shaft (2-3) is provided with a torsion spring for causing the swing arm (2-1) to drive the friction wheel (2-2) to deflect upward; a transmission shaft (2-4) driven by a motor is movably inserted in the hollow hinge shaft (2-3), and the transmission shaft (2-4) is correspondingly transmission-connected to the friction wheel (2-2).

2. The titanium ingot casting furnace according to claim 1, characterized in that: A positioning assembly is provided in the middle area of ​​the furnace body (1), the positioning assembly comprising a conical hole provided at one end of the transfer trolley (5), and a telescopic cylinder (9) inserted into the conical hole of the transfer trolley (5), the cylinder body of the telescopic cylinder (9) being correspondingly and firmly connected to the furnace body (1).

3. The titanium ingot casting furnace according to claim 1, characterized in that: Arc-shaped guide plates (7) are provided at positions corresponding to the friction wheels (2-2) at both ends of the transfer trolley (5).

4. The titanium ingot casting furnace according to claim 1, characterized in that: The multiple transmission shafts (2-4) of the transmission device (2) are connected by synchronous transmission via a chain.

5. The titanium ingot casting furnace according to claim 1, characterized in that: The tops of the three independent areas of the furnace body (1) are each provided with exhaust and intake pipes (8).

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