阅读说明：本技术 一种钨钼烧结炉的长方形感应线圈 (Rectangular induction coil of tungsten-molybdenum sintering furnace ) 是由 赵敏 严磊 但振坤 冯小军 于 2019-10-18 设计创作，主要内容包括：本发明提供一种钨钼烧结炉的长方形感应线圈,包括铜管和胶木立柱,铜管和胶木立柱组成长方形感应线圈,所述的长方形感应线圈内尺寸4910×1290mm,所述的铜管通过模具缠绕成线圈状,线圈之间的线圈匝间距为15-50mm；所述的胶木立柱在铜管外表面竖直方向上均匀分布,胶木立柱与铜管螺柱连接；所述的铜管的外表面连接有引出电极；所述铜管的壁厚为电流透入深度的1.2~1.57倍。本发明通过将圆形感应线圈更改为长方形感应线圈后,被烧结的钨钼制品可以平放在放料底托上,最大限度改善了被烧结材料的弯曲变形,大幅度减少钨钼制品的校直校平工艺,提高了产品质量。本发明提供的长方形感应线圈可以增加炉膛的利用率,能源消耗少,产能大。(The invention provides a rectangular induction coil of a tungsten-molybdenum sintering furnace, which comprises a copper pipe and bakelite stand columns, wherein the copper pipe and the bakelite stand columns form the rectangular induction coil, the inner size of the rectangular induction coil is 4910 multiplied by 1290mm, the copper pipe is wound into a coil shape through a die, the coil turn interval between the coils is 15-50mm, the bakelite stand columns are uniformly distributed on the outer surface of the copper pipe in the vertical direction, the bakelite stand columns are connected with copper pipe studs, the outer surface of the copper pipe is connected with an extraction electrode, and the wall thickness of the copper pipe is 1.2 ~ 1.57 times of current penetration depth.)

1. A rectangular induction coil of a tungsten-molybdenum sintering furnace is characterized by comprising a copper pipe (1) and bakelite upright columns (2), wherein the copper pipe (1) and the bakelite upright columns (2) form the rectangular induction coil, the inner size of the rectangular induction coil is 4910 multiplied by 1290mm, the copper pipe (1) is wound into a coil shape through a die, the coil turn interval (4) between the coils is 15-50mm, the bakelite upright columns (2) are uniformly distributed on the outer surface of the copper pipe (1) in the vertical direction, the bakelite upright columns (2) are connected with studs of the copper pipe (1), the outer surface of the copper pipe (1) is connected with an extraction electrode (3), and the wall thickness of the copper pipe (1) is 1.2 ~ 1.57.57 times of the current penetration depth.

2. The rectangular induction coil of the tungsten-molybdenum sintering furnace according to claim 1, wherein: the pitch of the bakelite upright post (2) is 240-560 mm.

3. The rectangular induction coil of the tungsten-molybdenum sintering furnace according to claim 1, wherein: the copper pipe (1) is internally filled with cooling water.

4. The rectangular induction coil of the tungsten-molybdenum sintering furnace according to claim 3, wherein: the cooling water has the following water quality requirements: the water inlet temperature is less than or equal to 25 +/-5 ℃, the PH value is within the range of 6-9, the resistivity is 30 multiplied by 10 omega, the cm hardness is not more than 10 ℃, wherein each 1 liter of water contains 10mg of calcium oxide, the total solid content is not more than 250mg/L, and the water outlet temperature is controlled to be below 45 ℃.

5. The rectangular induction coil of the tungsten-molybdenum sintering furnace according to claim 1, wherein: four corners around the rectangular induction coil are processed through round corners.

Technical Field

The invention belongs to the field of tungsten and molybdenum processing equipment, and particularly relates to a rectangular induction coil of a tungsten and molybdenum sintering furnace.

Background

The medium frequency induction sintering furnace is an important device widely used in the special metal processing industry of tungsten, molybdenum and the like. Induction heating is one of the good forms of electric heating, and it utilizes the faraday's electromagnetic induction principle to convert electric energy into heat energy, so that a three-phase power supply is changed into intermediate frequency alternating current by means of an intermediate frequency induction power supply, and after the alternating current passes through an induction coil, an alternating induction magnetic field is produced, i.e. an alternating magnetic flux phi whose size and direction are changed with time is produced. When a piece of conductive metal (namely tungsten and molybdenum workpieces) is placed in the induction coil, corresponding induced electromotive force can be generated inside the metal according to a Faraday's law of electromagnetic induction, the induced current can be generated due to the existence of the induced electromotive force even if the metal is a conductor, the induced current is called eddy current, and according to the Joule-Lenz law, the eddy current can generate certain heat when flowing inside the metal with certain resistance, so that the metal is heated.

At present, the hearth of the tungsten-molybdenum sintering furnace which is conventionally used is round, and when a plate blank is sintered, the space utilization rate is low, so that the requirement for large-scale sintering of the plate blank cannot be met. In the sintering process, due to insufficient charging, the plate blank is easy to deform in the sintering process, so that the subsequent processing and manufacturing are inconvenient, in order to save cost, the deformed plate blank needs to be heated and corrected, the production cost is increased, and the quality of a product is influenced by heating and pressure processing in the correcting process; the circular coil has low space utilization rate, so that the energy consumption is high and the efficiency is low in the using process.

Disclosure of Invention

In order to solve the problems of low space utilization rate, high energy consumption and low efficiency of the conventional circular coil in the using process, the invention provides the rectangular induction coil of the tungsten-molybdenum sintering furnace, which can increase the utilization rate of a hearth, and has the advantages of low energy consumption and high productivity.

The technical scheme adopted by the invention is as follows:

a rectangular induction coil of a tungsten-molybdenum sintering furnace comprises a copper pipe and bakelite stand columns, wherein the copper pipe and the bakelite stand columns form the rectangular induction coil, the inner size of the rectangular induction coil is 4910 multiplied by 1290mm, the copper pipe is wound into a coil shape through a die, the coil turn interval between the coils is 15-50mm, the bakelite stand columns are uniformly distributed on the outer surface of the copper pipe in the vertical direction, the bakelite stand columns are connected with copper pipe studs, the outer surface of the copper pipe is connected with an extraction electrode, and the wall thickness of the copper pipe is 1.2 ~ 1.57.57 times of the current penetration depth.

The pitch of the bakelite upright posts is 240-560 mm.

The copper pipe is internally communicated with cooling water.

The cooling water has the following water quality requirements: the water inlet temperature is less than or equal to 25 +/-5 ℃, the PH value is within the range of 6-9, the resistivity is 30 multiplied by 10 omega, the cm hardness is not more than 10 ℃, wherein each 1 liter of water contains 10mg of calcium oxide, the total solid content is not more than 250mg/L, and the water outlet temperature is controlled to be below 45 ℃.

Four corners around the rectangular induction coil are processed through round corners.

The invention has the beneficial effects that:

according to the invention, after the round induction coil is changed into the rectangular induction coil, the sintered tungsten-molybdenum product can be flatly placed on the discharging bottom support, so that the bending deformation of the sintered material is improved to the maximum extent, the straightening and leveling process of the tungsten-molybdenum product is greatly reduced, and the product quality is improved.

The rectangular induction coil provided by the invention can increase the utilization rate of the hearth, and has the advantages of low energy consumption and high productivity.

The following will be further described with reference to the accompanying drawings.

Drawings

Fig. 1 is a front view of an assembly of rectangular induction coils.

Fig. 2 is a top view of an assembly diagram of a rectangular induction coil.

Figure 3 is a front view of a copper tube.

Fig. 4 is a top view of a copper tube.

FIG. 5 is a view of a bakelite column opening profile.

FIG. 6 is a schematic view of a copper stud structure.

Fig. 7 is a cross-sectional view of a copper tube.

In the figures, the reference numbers are: 1. a copper pipe; 2. a bakelite column; 3. leading out an electrode; 4. coil turn spacing; 5. round corners; 6. the surface of the copper pipe; 7. inside the copper tube.

Detailed Description