Intermediate frequency furnace for casting and smelting

Abstract

The utility model discloses an intermediate frequency furnace for casting and smelting, and aims to solve the problem of adjustment of a furnace mouth of a traditional intermediate frequency furnace. The intermediate frequency furnace comprises a support, a smelting furnace body, a crucible, a furnace cover and the like, and a furnace mouth diameter adjusting mechanism is arranged on the furnace cover. The mechanism is composed of a fixing ring, a rotating rod, an adjusting piece, a sliding block, an adjusting ring and the like, the adjusting ring is driven by a telescopic cylinder to rotate, and stepless adjustment of the furnace mouth diameter is achieved. Compared with a traditional hinge type furnace opening furnace cover, the furnace opening furnace cover is fast to open, the furnace opening can be kept round all the time, heat is evenly dissipated from the center, the uniformity of the temperature in the furnace is improved, the smelting speed is increased, and the production efficiency is improved. And a small hole is reserved at the furnace mouth at the minimum limit position, so that the pressure in the furnace can be balanced, and the furnace is prevented from being exploded. The intermediate frequency furnace is convenient to operate, safe and reliable, can meet diversified smelting process requirements, effectively improves the metal smelting quality and prolongs the service life of equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to foundry equipment technical field, concretely is a kind of intermediate frequency furnace for casting smelting. BACKGROUND

[0002] Intermediate frequency furnace for casting smelting is the equipment widely used in foundry industry, and it works based on the principle of intermediate frequency electromagnetic induction heating. First, three-phase power frequency alternating current is rectified into direct current, and then it is inverted into intermediate frequency current. Through induction coil, alternating magnetic field is generated to make metal material inside produce eddy current heating and melting. Its structure has different forms such as aluminum shell and steel shell, and the configuration mode is various, including single power supply, single power supply-pull two, double power supply double power supply and large power supply and small power supply + guide furnace switch double power supply, etc. The equipment has the characteristics of fast heating speed, less oxidation decarburization, high automation degree, uniform heating, high temperature control precision, simple furnace body replacement, complete equipment protection, low energy consumption and no pollution, etc. It can be used for smelting of various metal materials, covering many fields from precious metal processing to small casting production and laboratory research and development.

[0003] In the prior art, a kind of intermediate frequency furnace for casting smelting with publication number "CN206787290U" includes furnace body, installation ring is set up at the furnace mouth of furnace body, and slit is opened in installation ring;The furnace body is also provided with a plurality of sector plates at the furnace mouth, the small end of each sector plate is provided with a U-shaped fastener along the inside contour of the sector plate, and the sector plate is hinged by being buckled into the slit of the installation ring through the U-shaped fastener;Each sector plate is arranged as a hollow sandwich structure, and a small sector plate can be extracted is arranged in the sandwich structure, when the inner end of the small sector plate moves to the opening of the sandwich structure, it is limited, the outer end of the small sector plate is rotatably connected with a supporting piece;A ring groove is opened on the outer wall of the furnace body, and a supporting block is arranged in the ring groove for the supporting piece of each small sector plate. The intermediate frequency furnace for casting smelting of the utility model solves the technical problem of the traditional technology of preventing molten iron overflow or splashing by setting installation ring and sector plate at the furnace mouth.

[0004] But the prior art still has great deficiencies, such as:

[0005] The adjustment mode of traditional hinged furnace mouth furnace cover is often fixed gear, and accurate furnace mouth size adjustment cannot be carried out according to actual demand. This makes it difficult to flexibly control the temperature and heat loss in the furnace according to the characteristics of different metal materials, smelting process requirements and real-time conditions in the furnace during smelting. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing an intermediate frequency furnace for casting smelting to solve the problems raised in the above background.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] The utility model provides a middle frequency furnace for casting smelting, including support, the support is rotationally arranged with the pivot, the fixedly arranged with smelting furnace body between the pivot, the fixedly arranged with crucible in the smelting furnace body, the fixedly arranged with furnace cover on the smelting furnace body, the fixedly arranged with furnace mouth diameter adjusting mechanism on the furnace cover.

[0009] Preferably, the furnace mouth diameter adjusting mechanism includes a fixed ring fixedly arranged on the furnace cover, a plurality of rotating rods are rotationally arranged in the fixed ring, adjusting pieces are fixedly arranged on the rotating rods, and sliding blocks are fixedly arranged at the other ends of the adjusting pieces.

[0010] An adjusting ring is also rotationally arranged in the fixed ring, the adjusting ring is concentrically arranged with the fixed ring, a plurality of sliding grooves are formed in the adjusting ring, the number of the sliding grooves matches the number of the adjusting pieces, the sliding blocks are slidingly arranged in the sliding grooves, and the adjusting pieces can be rotated by the sliding grooves through rotation of the adjusting ring.

[0011] Preferably, a groove is formed in the fixed ring, and an adjusting rod is fixedly arranged on the adjusting ring.

[0012] Preferably, a protective plate is also fixedly arranged on the furnace cover.

[0013] Preferably, a telescopic cylinder is rotationally arranged on the protective plate, and a movable end of the telescopic cylinder is rotationally connected to one end of the adjusting rod.

[0014] Preferably, a discharge hole is formed in the smelting furnace body, a discharge plate is fixedly arranged at the position of the smelting furnace in the discharge hole, and the discharge hole is communicated to the crucible.

[0015] Preferably, a speed reducer and a driving motor are also fixedly arranged on the support, a shaft of the driving motor is fixedly connected to an input end of the speed reducer, and an output end of the speed reducer is fixedly connected to one of the pivots.

[0016] Preferably, a fixed seat is fixedly arranged on the support, a positioning shaft is slidingly arranged on the fixed seat, a positioning plate is fixedly arranged on the smelting furnace body, and a positioning hole matched with the positioning shaft is formed in the positioning plate.

[0017] Preferably, the adjusting pieces are refractory ceramic pieces.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] 1. By setting the furnace mouth diameter adjusting mechanism, the furnace mouth can always be kept circular during the adjustment of the furnace mouth diameter. This design enables the heat in the furnace mouth to be better emitted from the center of the furnace mouth, and the heat is evenly emitted from the center of the furnace mouth, so that the temperature distribution in the furnace is more uniform, the local overheating or overcooling is avoided, the quality of metal smelting is improved, the problems such as metal composition segregation caused by uneven temperature are reduced, and the uniform heat field distribution can reduce the thermal stress generated by the temperature difference of each part of the furnace body, reduce the risk of damage of the furnace body, prolong the service life of the furnace body, and reduce the equipment maintenance cost.

[0020] 2. When the adjusting mechanism is in the minimum limit position, by setting the shape of the adjusting piece, the furnace mouth is not completely closed, but a small hole is reserved, which can slowly discharge the gas in the furnace, avoid excessive increase of the pressure in the furnace, thereby effectively preventing dangerous accidents such as furnace explosion, and ensuring the personal safety of the operator and the normal operation of the equipment.

[0021] 3. The mechanism can flexibly adjust the diameter of the furnace mouth, can accurately adjust the size of the furnace mouth according to different smelting processes and metal material characteristics, and realizes stepless adjustment of the diameter of the furnace mouth through the extension and retraction of the telescopic cylinder. In some smelting processes with high requirements for heat loss control, the diameter of the furnace mouth can be reduced, the heat loss is reduced, the energy utilization efficiency is improved, and the energy consumption cost is reduced; and when the feeding, slagging and other operations are needed, the diameter of the furnace mouth can be appropriately increased, so that the operator is provided with more convenient operation space, and the work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a whole device three-dimensional structure schematic view of the utility model;

[0023] Figure 2 It is another perspective three-dimensional structure schematic view of the whole device of the utility model;

[0024] Figure 3 It is a crucible three-dimensional structure schematic view of the utility model;

[0025] Figure 4 It is a furnace mouth diameter adjusting mechanism three-dimensional structure schematic view of the utility model;

[0026] Figure 5 It is an open state diagram of the furnace mouth diameter adjusting mechanism of the utility model;

[0027] Figure 6 It is a contraction state diagram of the furnace mouth diameter adjusting mechanism of the utility model;

[0028] Figure 7 It is an open state diagram of the furnace mouth diameter adjusting mechanism (single adjusting piece) of the utility model;

[0029] Figure 8The utility model discloses a furnace mouth diameter adjusting mechanism (single adjusting sheet) contraction state diagram.

[0030] In the drawing: 1, support; 2, rotating shaft; 3, smelting furnace body; 4, crucible; 5, furnace cover; 6, furnace mouth diameter adjusting mechanism; 61, fixed ring; 62, rotating rod; 63, adjusting sheet; 64, sliding block; 65, adjusting ring; 66, sliding slot; 67, groove; 68, adjusting rod; 7, protection plate; 8, telescopic cylinder; 9, discharge hole; 10, discharge plate; 11, speed reducer; 12, driving motor; 13, fixed seat; 14, positioning shaft; 15, positioning plate; 16, positioning hole. DETAILED DESCRIPTION

[0031] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the utility model.

[0032] Please refer to Figures 1-8 The utility model provides a technical scheme:

[0033] The utility model discloses a medium frequency furnace for casting smelting, which aims at solving the problems of the fixed diameter of the furnace mouth of the traditional medium frequency furnace, inconvenient feeding and slagging for the operator and the like, so as to meet the needs of different smelting processes and improve the discharging efficiency and quality.

[0034] The mechanism includes support 1, which is welded by high-strength steel material and can stably support the whole medium frequency furnace. Rotating shafts 2 are rotatably arranged on the support 1 through high-precision rolling bearings, and the two rotating shafts 2 are in coaxial state. The smelting furnace body 3 is fixedly arranged between the rotating shafts 2 in a welding mode, so that the smelting furnace body 3 can rotate around the rotating shafts 2, and a plurality of reinforcing ribs are further arranged between the rotating shafts 2 and the smelting furnace body 3.

[0035] The crucible 4 is fixedly arranged in the smelting furnace body 3 and is made of high-temperature-resistant ceramic material and firmly bonded to the inner wall of the smelting furnace body 3 through a high-temperature-resistant adhesive, and is used for containing metal materials to be smelted. The furnace cover 5 is fixedly arranged on the top of the smelting furnace body 3 through bolts.

[0036] The furnace mouth diameter adjusting mechanism 6 is fixedly arranged on the furnace cover 5. The fixed ring 61 of the mechanism is welded on the furnace cover 5, and a plurality of mounting holes are uniformly distributed in the circumferential direction of the fixed ring 61. The rotating rod 62 is rotatably arranged in the mounting hole through a small bearing, so as to ensure the flexible rotation of the rotating rod 62. The adjusting sheet 63 is fixedly connected to each rotating rod 62 through a clamping groove, and the adjusting sheet 63 is a refractory ceramic sheet and can withstand high temperature. The sliding block 64 is fixedly connected to the other end of the adjusting sheet 63.

[0037] The fixed ring 61 is rotationally provided with an adjusting ring 65 concentric with the fixed ring 61. The adjusting ring 65 is circumferentially provided with a number of sliding grooves 66 matched with the number of the adjusting pieces 63, and the sliding blocks 64 are slidingly arranged in the sliding grooves 66. When the adjusting ring 65 is rotated, the sliding grooves 66 drive the sliding blocks 64 to move, so that the adjusting pieces 63 are rotated around the rotating rod 62, thereby realizing the adjustment of the diameter of the furnace mouth. In order to facilitate the rotation of the adjusting ring 65, the fixed ring 61 is provided with a recess 67, and the adjusting ring 65 is welded with an adjusting rod 68 extending into the recess 67, so that the operator can rotate the adjusting ring 65 by operating the adjusting rod 68.

[0038] The furnace cover 5 is further provided with a protection plate 7 fixed by bolts, and the operator can stand on the protection plate 7 to perform the charging and slagging work. The protection plate 7 is rotationally provided with a hydraulic telescopic cylinder 8 through a hinged seat, and the movable end of the telescopic cylinder 8 is rotationally connected with one end of the adjusting rod 68 through a hinged seat. When the movable end of the telescopic cylinder 8 is extended or retracted, the adjusting rod 68 is driven to move, and the adjusting ring 65 is rotated, thereby realizing the automatic adjustment of the diameter of the furnace mouth.

[0039] The smelting furnace body 3 is provided with a discharge hole 9 communicated to the crucible 4, and the smelted metal liquid can flow out through the discharge hole 9. The discharge hole 9 is welded with a discharge plate 10 made of high-temperature-resistant alloy material and having a smooth surface, which is used to guide the metal liquid to flow to a designated container.

[0040] The support 1 is respectively provided with a speed reducer 11 and a driving motor 12 fixed by bolts, the shaft of the driving motor 12 is fixedly connected with the input end of the speed reducer 11 through a shaft coupling, and the output end of the speed reducer 11 is fixedly connected with one of the rotating shafts 2 through a shaft coupling. When the driving motor 12 is started, power is transmitted to the rotating shaft 2 through the speed reducer 11, so as to drive the smelting furnace body 3 to rotate around the rotating shaft 2 to realize the discharging operation.

[0041] The support 1 is welded with a fixing seat 13, and the fixing seat 13 is provided with a sliding hole, and the positioning shaft 14 is slidingly arranged in the sliding hole. The smelting furnace body 3 is welded with a positioning plate 15, and the positioning plate 15 is provided with a positioning hole 16 matched with the positioning shaft 14. When the smelting furnace body 3 is in the working position, the positioning shaft 14 is inserted into the positioning hole 16, so as to position the smelting furnace body 3 and ensure the stability of the smelting furnace body 3.

[0042] In actual work, first, the metal material to be smelted is placed in the crucible 4, and the intermediate frequency furnace heating system is started to smelt. During smelting, the telescopic cylinder 8 can be started as needed, the telescopic cylinder 8 moves the adjusting rod 68, the adjusting rod 68 drives the adjusting ring 65 to rotate, the adjusting piece 63 is rotated through the sliding groove 66 and the sliding block 64, the diameter of the furnace mouth is changed, heat loss and metal liquid splashing are controlled. After the smelting of the metal material is completed, the driving motor 12 is started, and the smelting furnace body 3 is rotated around the rotating shaft 2 to the discharging position, and the positioning shaft 14 is inserted for positioning. At this time, the smelted metal liquid flows into the designated container through the discharging hole 9 and the discharging plate 10. After discharging is completed, the driving motor 12 is started in reverse, and the smelting furnace body 3 returns to the initial position.

[0043] Working principle: in the process of use, the operator puts the metal material to be smelted into the crucible 4 in the intermediate frequency furnace, the crucible 4 is made of high-temperature resistant ceramic material, and is firmly bonded with the inner wall of the smelting furnace body 3 through high-temperature resistant adhesive. Then start the heating system of the intermediate frequency furnace, and start smelting the metal material.

[0044] During smelting, in order to meet the needs of different smelting processes, such as controlling heat loss, preventing metal liquid splashing or facilitating the operator to add material, slag lifting and other operations, the diameter of the furnace mouth needs to be adjusted. At this time, the furnace mouth diameter adjusting mechanism 6 starts to play a role.

[0045] When the smelting of the metal material is completed, the driving motor 12 is started. The power of the driving motor 12 is transmitted to the speed reducer 11 through the shaft coupling, and the speed reducer 11 transmits the power to one of the rotating shafts 2, so as to drive the smelting furnace body 3 to rotate around the rotating shaft 2. When the smelting furnace body 3 rotates to the discharging position, the positioning shaft 14 is inserted into the positioning hole 16 in the positioning plate 15, so as to ensure the stability of the smelting furnace body 3. At this time, the smelted metal liquid flows out through the discharging hole 9 and is guided to the designated container through the discharging plate 10.

[0046] After discharging is completed, the driving motor 12 is started in reverse, and the smelting furnace body 3 rotates around the rotating shaft 2 to return to the initial position, preparing for the next smelting work.

[0047] The fixed ring 61 is welded on the furnace cover 5, and a plurality of mounting holes are uniformly distributed in the circumferential direction, the rotating rod 62 is rotatably arranged in the mounting holes through a small bearing, so that the rotating rod 62 can rotate flexibly. The refractory ceramic adjusting piece 63 is fixedly connected on each rotating rod 62 through a clamping groove, and the other end of the adjusting piece 63 is fixedly connected with the sliding block 64. The adjusting ring 65 is rotatably arranged in the fixed ring 61 and is concentric with the fixed ring 61, the adjusting ring 65 is provided with a sliding groove 66 matched with the number of the adjusting pieces 63 in the circumferential direction, and the sliding block 64 is slidably arranged in the sliding groove 66. If the operator wants to adjust the diameter of the furnace opening, the adjusting rod 68 welded on the adjusting ring 65 can be operated, because the adjusting rod 68 extends into the groove 67 of the fixed ring 61, rotating the adjusting rod 68 will drive the adjusting ring 65 to rotate. When the adjusting ring 65 rotates, the sliding groove 66 will drive the sliding block 64 to move, so that the adjusting piece 63 rotates around the rotating rod 62. When the adjusting piece 63 rotates towards the center of the furnace opening, the diameter of the furnace opening becomes smaller, and when the adjusting piece 63 rotates away from the center of the furnace opening, the diameter of the furnace opening becomes larger.

[0048] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A medium frequency furnace for casting smelting, comprising a support (1), a rotating shaft (2) is arranged on the support (1), a smelting furnace body (3) is fixedly arranged between the rotating shaft (2), a crucible (4) is fixedly arranged in the smelting furnace body (3), characterized in that: The smelting furnace body (3) is fixedly provided with a furnace cover (5), and the furnace cover (5) is fixedly provided with a furnace mouth diameter adjusting mechanism (6).

2. The medium frequency furnace for casting and smelting according to claim 1, characterized in that: The furnace mouth diameter adjusting mechanism (6) comprises a fixed ring (61) fixedly arranged on the furnace cover (5), a plurality of rotating rods (62) rotatably arranged in the fixed ring (61), an adjusting piece (63) fixedly arranged on the rotating rod (62), and a sliding block (64) fixedly arranged at the other end of the adjusting piece (63). The fixed ring (61) is also rotatably provided with an adjusting ring (65), and the adjusting ring (65) is concentrically arranged with the fixed ring (61). A plurality of sliding grooves (66) are formed in the adjusting ring (65), and the number of the sliding grooves (66) matches the number of the adjusting pieces (63). The sliding block (64) is slidably arranged in the sliding groove (66), and the adjusting ring (65) is rotated to drive the adjusting piece (63) to rotate through the sliding groove (66).

3. The intermediate frequency furnace for casting and melting according to claim 2, characterized in that: A groove (67) is formed in the fixed ring (61), and an adjusting rod (68) is fixedly arranged on the adjusting ring (65).

4. The intermediate frequency furnace for casting and melting according to claim 3, characterized in that: The furnace cover (5) is also fixedly provided with a protective plate (7).

5. The intermediate frequency furnace for casting and melting according to claim 4, characterized in that: The protective plate (7) is rotatably provided with a telescopic cylinder (8), and the movable end of the telescopic cylinder (8) is rotatably connected with one end of the adjusting rod (68).

6. The intermediate frequency furnace for casting and melting according to claim 5, characterized in that: The smelting furnace body (3) is provided with a discharging hole (9), and the smelting furnace is fixedly provided with a discharging plate (10) at the position of the discharging hole (9). The discharging hole (9) is communicated with the crucible (4).

7. The intermediate frequency furnace for casting and melting according to claim 2, characterized in that: The support (1) is also fixedly provided with a speed reducer (11) and a driving motor (12). The shaft of the driving motor (12) is fixedly connected with the input end of the speed reducer (11), and the output end of the speed reducer (11) is fixedly connected with one of the rotating shafts (2).

8. The intermediate frequency furnace for casting and melting according to claim 1, characterized in that: The support (1) is fixedly provided with a fixed seat (13), and the fixed seat (13) is slidably provided with a positioning shaft (14). The smelting furnace body (3) is fixedly provided with a positioning plate (15), and the positioning plate (15) is provided with a positioning hole (16) matched with the positioning shaft (14).

9. The intermediate frequency furnace for casting and melting according to claim 2, characterized in that: The adjusting piece (63) is a refractory ceramic piece.

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