CN210980831U

CN210980831U - Square induction coil for 2500 ℃ tungsten-molybdenum sintering furnace

Info

Publication number: CN210980831U
Application number: CN201921754605.4U
Authority: CN
Inventors: 邢朋娟; 刘艳; 严磊; 惠圆圆; 但振坤
Original assignee: Xi'an Chenghang Furnace Industry Co ltd
Current assignee: Xi'an Chenghang Furnace Industry Co ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-07-10
Anticipated expiration: 2029-10-18

Abstract

The utility model provides a square induction coil for a 2500 ℃ tungsten-molybdenum sintering furnace, which comprises a copper pipe, a bakelite upright post, a leading-out electrode and an electrode flange; the copper pipe is wound into a square coil shape, the bakelite upright posts are uniformly distributed on the outer surface of the copper pipe, the distance between every two adjacent bakelite upright posts is 240-560mm, the outer surface of the copper pipe is provided with an extraction electrode, and the extraction electrode is connected with an electrode flange; the copper pipe of the copper pipe is internally communicated with cooling water, and the surface of the electrode flange, which is far away from the leading-out electrode, is a conductive sealing surface. The utility model discloses a behind changing circular induction coil into square coil, the tungsten molybdenum product by the sintering can keep flat on the blowing collet, and furthest has improved by sintered material's bending deformation, reduces substantially the alignment levelling technology of tungsten molybdenum product, has improved product quality. The utility model provides a square induction coil can increase furnace's utilization ratio, and energy resource consumption is few, and the productivity is big.

Description

Square induction coil for 2500 ℃ tungsten-molybdenum sintering furnace

Technical Field

The utility model belongs to tungsten molybdenum processing equipment field especially relates to a square induction coil that is used for 2500 ℃ tungsten molybdenum fritting 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.

SUMMERY OF THE UTILITY MODEL

In order to overcome current circular coil space utilization low, the energy consumption is big in the use, problem of inefficiency, the utility model provides a square induction coil for 2500 ℃ tungsten molybdenum fritting furnace, the utility model provides a square induction coil can increase furnace's utilization ratio, and energy resource consumption is few, and the productivity is big.

The utility model adopts the technical proposal that:

a square induction coil used for a 2500 ℃ tungsten-molybdenum sintering furnace comprises a copper pipe, a bakelite upright post, an extraction electrode and an electrode flange; the copper pipe is wound into a square coil shape, the bakelite upright posts are uniformly distributed on the outer surface of the copper pipe, the distance between every two adjacent bakelite upright posts is 240-560mm, and the outer surface of the copper pipe is provided with an extraction electrode which is connected with an electrode flange; the cooling water is filled in the copper pipe of the copper pipe, the surface of the electrode flange far away from the leading-out electrode is a conductive sealing surface, and the conductive sealing surface does not leak under the condition of water filling.

Four corners around the coil-shaped copper pipe wound into a square shape are copper pipe fillets.

The copper pipe turns of the copper pipe are 5-35mm in distance.

The copper pipe and the bakelite upright post are fixed through a copper stud.

The utility model has the advantages that:

compare and the temperature that can effective work of current induction coil is 2500 ℃, the utility model provides a square induction coil can be at effectual work under 2500 ℃ of condition, and its energy consumption reduces simultaneously, the effectual market competition who improves the product.

The utility model discloses a behind changing circular induction coil into square coil, the tungsten molybdenum product by the sintering can keep flat on the blowing collet, and furthest has improved by sintered material's bending deformation, reduces substantially the alignment levelling technology of tungsten molybdenum product, has improved product quality.

The utility model provides a square induction coil can increase furnace's utilization ratio, and energy resource consumption is few, and the productivity is big.

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

Drawings

Fig. 1 is a front view of an induction coil assembly.

Fig. 2 is a top view of an assembly diagram of an 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 the electrode flange structure.

FIG. 7 is a schematic diagram of a copper stud structure.

Figure 8 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. an electrode flange; 5. copper pipe turn spacing; 6. coil turn spacing; 7. copper pipe round corners; 8. a conductive sealing face; 9. the surface of the copper pipe; 10. inside the copper tube.

Detailed Description

Example 1:

A square induction coil used for a 2500 ℃ tungsten-molybdenum sintering furnace comprises a copper pipe 1, a bakelite upright post 2, an extraction electrode 3 and an electrode flange 4; the copper pipe 1 is wound into a square coil shape, the bakelite upright posts 2 are uniformly distributed on the outer surface of the copper pipe 1, the distance between every two adjacent bakelite upright posts 2 is 240-560mm, the outer surface of the copper pipe 1 is provided with an extraction electrode 3, and the extraction electrode 3 is connected with an electrode flange 4; cooling water is filled in the copper pipe 10 of the copper pipe 1, the surface of the electrode flange 4 far away from the extraction electrode 3 is a conductive sealing surface 8, and the conductive sealing surface 8 does not leak under the condition of water filling.

The copper pipe 1 provided by the utility model is wound into a coil shape by adopting a square mould, so that the copper pipe is ensured not to deform in the winding process, and the copper pipe 1 is protected by a tool when required; and a turn interval is reserved between every two layers of copper pipes 1, so that the insulativity between the copper pipes 1 is ensured. Copper pipe 1 that the winding formed is fixed by bakelite stand 2, guarantees certain distance between the bakelite stand 2, and the distance is too big, and the winding copper pipe is easy loose, and apart from the undersize, manufacturing cost can improve, the utility model discloses well bakelite stand 2's interval is 240 supplementarian 560 mm.

In the heating process, the induction coil needs to be cooled by water, the sealing performance of welding is required to be ensured when the induction coil is welded, and the leakage phenomenon cannot occur. The induction coil is internally provided with water and externally provided with electricity, and has sealing property and conductivity when being led out. When the induction coil is filled with water for heating, the water in the copper pipe 10 is also electrified, and the backwater needs to be insulated when the induction coil returns the water, so that the safety is ensured. The turn pitch between induction coils of the utility model is controlled at 15-50 mm; the distance between each bakelite upright post 2 is controlled to be 240 mm and 560 mm; the induction coil leading-out flange sealing ring is required to be water-tight and conductive; after the induction coil is welded, performing a pressing test, wherein the pressing range is 0.3-0.4MPa of water pressure, and the pressure is maintained for 48 hours, so that leakage and abnormal sound cannot occur; the induction coil backwater needs insulation treatment; and four corners of the square induction coil are required to be rounded.

The utility model provides a pair of a square induction coil for 2500 ℃ tungsten molybdenum sintering furnace is applied to in the furnace of rectangle structure, the utility model discloses under 2500 ℃ of the condition, fire for a long time, not discover the problem, guaranteed the smooth work of whole device. Therefore, the utility model provides a square induction coil can adapt to 2500 ℃ high temperature condition. Compared with a common induction coil, the maximum temperature which can be applied is 2500 ℃. The utility model provides a square induction coil can not only be applicable to 2500 ℃ high temperature, compares simultaneously with other induction coil, square induction coil can increase furnace's utilization ratio, reduces the consumption of the energy. The utility model discloses in being applied to the furnace of rectangle structure, this kind of structure can make the tungsten molybdenum slab goods level of being sintered place on the blowing collet, and furthest has improved by sintering material's bending deformation, reduces substantially the alignment levelling process of tungsten molybdenum goods, and reduction in production cost avoids the heating of school type in-process and the influence of pressure processing to the goods quality simultaneously. The hearth charging utilization rate is increased, the energy consumption is reduced compared with a vertical circular structure, and the market competitiveness of the product is effectively improved.

Example 2:

based on embodiment 1, in this embodiment, four corners of the circumference of the coiled copper pipe 1 wound in a square shape are copper pipe rounded corners 7.

The copper tube 1 has a copper tube turn pitch 5 of 5-35 mm.

The copper pipe 1 and the bakelite upright post 2 are fixed through a copper stud.

The quality of the cooling water requires that 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 × 10 and 10 omega, the cm hardness is not more than 10 ℃, wherein each temperature is 1 liter of water and contains 10mg of calcium oxide, the total solid content is not more than 250 mg/L, and the water outlet temperature is controlled to be below 45 ℃.

The square induction coil provided by the utility model comprises a copper pipe 1 and bakelite stand columns 2, the copper pipe 1 with the cross section of the copper pipe 1 shown in figure 8 is wound into the shape of a coil shown in figure 4 through a special die, the copper pipe 1 shown in figure 8 is not deformed in the winding process, copper pipe fillets 7 are processed at four corners in the winding process to ensure the uniformity of a magnetic field and eddy current, the copper pipe 1 shown in figure 3 and the bakelite stand columns 2 are fixed to the copper pipe 1 shown in figure 3 through copper studs shown in figure 7 when winding, the welding position of the copper studs shown in figure 7 is based on a distribution diagram of holes formed in the bakelite stand columns 2 shown in figure 5, when the induction coil shown in figure 3 is fixed by using the bakelite stand columns 2, the distance between each bakelite stand column 2 is ensured to be uniform as much as possible and the interval is 560mm, the stable induction coil shown in figures 1 and 2 after fixing is ensured to be within a range of induction coil temperature equal to or less than 240 mm, the stable induction coil temperature of induction coil 1 and the induction coil 2 when the induction coil is heated, the induction coil is heated to ensure that the copper pipe 1 is heated to a certain temperature, the induction coil temperature is equal to 10.10-10 mm, the induction coil is heated, the induction coil is heated, the copper pipe 1 is heated to ensure that the copper pipe 1 is heated, the copper pipe is heated to be heated to a sealing ring, the copper pipe is heated to be equal to a sealing ring, the sealing ring is heated to be heated to a temperature of a temperature, the sealing ring is not to be equal to 10-10 mm, the sealing ring.

The above illustration is merely an illustration of the present invention, and does not limit the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention. The devices and their structural components not described in detail in this embodiment are well known in the art and commonly used in the industry, and will not be described herein.

Claims

1. A square induction coil for a 2500 ℃ tungsten-molybdenum sintering furnace is characterized in that: comprises a copper pipe (1), a bakelite upright post (2), an extraction electrode (3) and an electrode flange (4); the copper pipe (1) is wound into a square coil shape, the bakelite upright posts (2) are uniformly distributed on the outer surface of the copper pipe (1), the distance between every two adjacent bakelite upright posts (2) is 240-560mm, the outer surface of the copper pipe (1) is provided with an extraction electrode (3), and the extraction electrode (3) is connected with an electrode flange (4); cooling water is introduced into the copper pipe (10) of the copper pipe (1), the surface of the electrode flange (4) far away from the extraction electrode (3) is a conductive sealing surface (8), and the conductive sealing surface (8) does not leak under the condition of water introduction.

2. The square induction coil for the 2500 ℃ tungsten-molybdenum sintering furnace according to claim 1, characterized in that: four corners around the coil-shaped copper pipe (1) wound into a square shape are copper pipe fillets (7).

3. The square induction coil for the 2500 ℃ tungsten-molybdenum sintering furnace according to claim 1, characterized in that: the copper tube (1) is characterized in that the copper tube turn interval (5) is 5-35 mm.

4. The square induction coil for the 2500 ℃ tungsten-molybdenum sintering furnace according to claim 1, characterized in that: the copper pipe (1) and the bakelite upright post (2) are fixed through a copper stud.