CN104534886B - Assembled induction apparatus - Google Patents

Abstract

The invention discloses a kind of assembled induction apparatus, including induction apparatus shell, induction coil, furnace lining, one pair of water-cooled guide rail, described induction coil is placed in induction apparatus shell, described furnace lining is that carbofrax material sintering is prefabricated to be formed, furnace lining is placed in induction coil, and described one pair of water-cooled guide rail is placed in the bottom of the inwall of furnace lining.The invention has the beneficial effects as follows that lining sintering is prefabricated to form, repair and replacement are convenient and swift；Use and become pitch of turn coil, strengthen the intensification at induction apparatus two ends, insulation effect, make whole blank heating temperature uniform；Water-cooled guide rail spraying abrasion-proof alloy extends guide rail service life, prevents equipment breakdown.

Description

Assembled sensor

technical field

The invention relates to an inductor, in particular to an assembled inductor, and belongs to the technical field of induction heating equipment.

Background technique

Induction heating equipment is used in forging, heat treatment and other processes, and has the advantages of energy saving, high efficiency and environmental protection. At present, induction heating equipment is mainly composed of two parts: power supply and inductor. The inductor is mainly composed of induction coils, heat-resistant furnace linings, water-cooled guide rails, etc. The manufacturing process of the inductors in the prior art is knotted, that is, after the inductor coils are manufactured and connected according to the designed connection method, the quartz sand is mainly used. The knotted material is poured into the wooden mold, and after the knotted material is dried, it is baked in the drying room to shape the knotted material. This kind of inductor has the following problems in use. The furnace lining is made of quartz sand material. After the damage occurs due to the impact of the workpiece or high-temperature cracking during the production process, the entire inductor must be replaced, otherwise the oxide scale or workpiece produced by the workpiece will be damaged. It is easy to contact the charged induction coil from the damaged furnace village, causing equipment accidents. Replacing an inductor requires hoisting, disassembly and assembly of the circuit, disassembly of the cooling water circuit, etc., which is time-consuming and laborious, and has a great impact on production; and the repair of the replaced inductor is also a problem, even if there is a small hole in the furnace lining. It is also necessary to tie the entire inductor into a whole, and smash the furnace lining bonded with the induction coil, and re-use the quartz material to knot the shape. This work is complicated and cumbersome, and the working environment is poor. General sensor equipment users It is impossible to master, and equipment such as a drying room is needed, and it is time-consuming and laborious to transport it back to the manufacturer for maintenance.

Contents of the invention

The purpose of the present invention is to provide a prefabricated inductor. The furnace lining is prefabricated and sintered by high temperature resistant materials according to specifications. When the furnace lining of the inductor in use is damaged, it can be quickly replaced on site, saving time and labor.

The purpose of the present invention is achieved through the following technical solutions:

An assembled inductor, including an inductor shell 1, an induction coil 2, a furnace lining 3, and a pair of water-cooled guide rails 4, the induction coil 2 is placed in the inductor shell 1, and the furnace lining 3 is prefabricated by sintering silicon carbide material In this way, the furnace lining 3 is placed in the induction coil 2 , and the pair of water-cooled guide rails 4 is placed at the bottom of the inner wall of the furnace lining 3 .

The object of the present invention can also be further realized through the following technical measures:

The aforementioned assembled inductor, wherein the induction coil 2 is divided into a head 5, a middle section 6, and a tail 7 in the direction of feeding the inductor, and the turn pitch of the head 5 and tail 7 coils is smaller than that of the middle section 6 coils.

In the aforementioned fabricated inductor, the lengths of the head 5 and the tail 7 of the induction coil are 1.2 to 1.5 times the diameter of the end surface of the workpiece to be heated.

The aforementioned fabricated inductor, wherein the furnace lining 3 is segmented, is spliced between two adjacent sections of the furnace lining with a male and female joint, and the joint of the inner circle of the furnace lining is caulked with quartz sand and adhesive.

In the aforementioned assembled inductor, the water-cooling guide rail 4 is an austenitic stainless tube, and nickel-chromium-borosilicate alloy powder is sprayed on the contact between the water-cooling guide rail 4 and the workpiece.

The aforementioned assembled inductor also includes an insulating layer 5, which is placed between the furnace lining 3 and the induction coil 2, and the material of the insulating layer 5 is aluminum silicate.

Compared with the prior art, the beneficial effects of the present invention are: the furnace lining is prefabricated by sintering, and the replacement and maintenance are convenient and fast; the variable pitch coil is used to strengthen the heating and heat preservation functions at both ends of the inductor, so that the heating temperature of the entire billet is uniform; the water-cooled guide rail Spray wear-resistant alloy to prolong the service life of the guide rail and prevent equipment accidents.

Description of drawings

Fig. 1 is the sectional view of assembled inductor of the present invention;

Fig. 2 is the sectional view of the assembled inductor of adding insulation layer of the present invention;

Fig. 3 is a schematic structural diagram of the variable pitch coil of the present invention.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the fabricated inductor of the present invention comprises an inductor housing 1, an induction coil 2, a furnace lining 3, and a pair of water-cooled guide rails 4, the induction coil 2 is placed in the inductor housing 1, and the furnace lining 3 is The silicon carbide material is sintered and prefabricated, the furnace lining 3 is placed in the induction coil 2 , and the pair of water-cooled guide rails 4 is placed at the bottom of the inner wall of the furnace lining 3 . When the inductor is working, the workpiece 8 to be heated enters from one end of the inductor, and the lower end is in contact with the water-cooled guide rail 4. If the number of repetitions is too high, the tube wall of the water-cooled guide rail 4 will be worn through, and the internal cooling water will be sprayed out to cause equipment failure. Accidents, in order to prevent the above situation, nickel-chromium borosilicate powder is sprayed at the contact point between the austenitic stainless steel tube of the water-cooled guide rail 4 and the workpiece at high temperature to form a wear-resistant layer to prolong the service life of the guide rail. The furnace lining 3 of the present invention is prefabricated by sintering silicon carbide material and assembled in the induction coil 2 . As shown in Figure 2, in order to achieve better heat preservation and insulation effects, an insulation layer 5 made of aluminum silicate material can be laid between the outer wall of the furnace lining and the inner wall of the induction coil. The furnace lining 3 of the present invention is prefabricated by sintering silicon carbide material, and when a certain furnace lining is damaged, it can be disassembled and replaced with a new furnace lining on site. When the inductor is longer, a segmented furnace lining can be used to achieve a better effect of convenient replacement. The segmented furnace lining is spliced between two adjacent furnace linings with male and female spigots, in order to prevent the surface of the workpiece from falling off. The oxide skin falls from the gap to the induction coil, and the quartz sand is used to adjust the adhesive caulking at the joint of the inner circle of the furnace lining.

The inductor coil is wound by a conductive copper tube. The induction heating current of the inductor has a skin effect, and the induction current is gradually heated from the outer layer of the workpiece to the core. In a certain section of the inductor, the power density for heating the workpiece is inversely proportional to the turn pitch of the inductor coil, and the smaller the turn pitch, the greater the power density. Since the furnace mouth at both ends of the inductor is open, due to air exchange, poor heat preservation effect, and magnetic flux phenomenon at the furnace mouth, it is inevitable that the temperature at both ends of the workpiece to be heated is low and the middle temperature is high during the heating process. This phenomenon is especially obvious when long rods are heated. As shown in Figure 3, in order to solve the above problems, the induction coil 2 of the present invention is divided into a head 5, a middle section 6, and a tail 7 in the direction of feeding the inductor, and the turns of the head 5 and the tail 7 coils are smaller than the middle section 6 The turn pitch of the coil. That is, the turn pitch at both ends of the coil is smaller than the turn pitch at the middle part to increase the power density and compensate for the temperature drop caused by air exchange and magnetic dispersion. The above-mentioned technical means make the overall temperature of the workpiece uniform and ensure the processing quality. In order to achieve a better temperature uniformity effect, the length of the variable pitch portion of the head 5 and tail 7 of the induction coil is 1.2 to 1.5 times the diameter of the end surface of the workpiece to be heated.

In addition to the above-mentioned embodiments, the present invention can also have other implementations, and all technical solutions formed by equivalent replacement or transformation fall within the scope of protection required by the present invention.

Claims (3)

1. an assembled induction apparatus, including induction apparatus shell, induction coil, furnace lining, one pair of water-cooled guide rail, Described induction coil is placed in induction apparatus shell, and described furnace lining is that carbofrax material sintering is prefabricated to be formed, furnace lining Being placed in induction coil, described one pair of water-cooled guide rail is placed in the bottom of the inwall of furnace lining, and described induction coil is in sense Answering and be divided into head, stage casing, afterbody on device feedstock direction, the pitch of turn of described head and afterbody coil is less than stage casing The pitch of turn of coil, it is characterised in that the head of described induction coil and the workpiece end face a length of to be heated of afterbody 1.2 to 1.5 times of diameter；Described furnace lining is stagewise, with male and female seam between adjacent two-stage furnace lining Splicing, and furnace lining inner circle seam crossing with quartz sand be in harmonious proportion binding agent filleting.

2. assembled induction apparatus as claimed in claim 1, it is characterised in that described water-cooled guide rail is Ovshinsky Body stainless pipe, sprays nickel chromium triangle borosilicate alloy powder at water-cooled guide rail with absorption surface.

3. assembled induction apparatus as claimed in claim 1, it is characterised in that also include heat-insulation layer, described Heat-insulation layer is placed between furnace lining and induction coil, and the material of heat-insulation layer is aluminium silicate.