阅读说明：本技术 一种方形钨钼感应烧结炉 (Square tungsten molybdenum induction sintering furnace ) 是由 邢朋娟 严磊 惠圆圆 刘艳 但振坤 于 2019-10-18 设计创作，主要内容包括：本发明提供一种方形钨钼感应烧结炉,包括发热体、耐火装置、感应线圈、炉体、升降系统和料车；所述的发热体、耐火装置和感应线圈均设在炉体内底部中央,所述的耐火装置位于发热体外,感应线圈设在耐火装置外；所述的料车设在升降系统下端的升降平台上,且料车位于炉体下方；所述的升降系统顶端位于炉体中下部的一侧。本发明中发热体、耐火装置、感应线圈均采用长方形结构,这种结构可以使被烧结的钨钼板坯制品水平放置在放料底托上,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序,降低生产成本,同时避免校型过程中的加热及压力加工对制品质量的影响。(The invention provides a square tungsten-molybdenum induction sintering furnace, which comprises a heating body, a refractory device, an induction coil, a furnace body, a lifting system and a skip car, wherein the heating body is arranged on the furnace body; the heating body, the fire-resistant device and the induction coil are all arranged in the center of the bottom in the furnace body, the fire-resistant device is positioned outside the heating body, and the induction coil is arranged outside the fire-resistant device; the skip car is arranged on a lifting platform at the lower end of the lifting system, and the skip car is positioned below the furnace body; the top end of the lifting system is positioned at one side of the middle lower part of the furnace body. The heating body, the refractory device and the induction coil all adopt rectangular structures, and the structure can enable the sintered tungsten-molybdenum plate blank product to be horizontally 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 procedures of the tungsten-molybdenum product are greatly reduced, the production cost is reduced, and the influence of heating and pressure processing in the shaping process on the product quality is avoided.)

1. A square tungsten-molybdenum induction sintering furnace is characterized in that: comprises a heating body (1), a fireproof device (2), an induction coil (3), a furnace body (4), a lifting system (5) and a skip car (6); the heating body (1), the fire-resistant device (2) and the induction coil (3) are all arranged in the center of the bottom in the furnace body (4), the fire-resistant device (2) is positioned outside the heating body (1), and the induction coil (3) is arranged outside the fire-resistant device (2); the skip car (6) is arranged on a lifting platform at the lower end of the lifting system (5), and is positioned below the furnace body (4); the top end of the lifting system (5) is positioned at one side of the middle lower part of the furnace body (4).

2. The square tungsten-molybdenum induction sintering furnace according to claim 1, wherein: the furnace body (4) is a cylindrical furnace body.

3. The square tungsten-molybdenum induction sintering furnace according to claim 1, wherein: the heating element (1) is made of tungsten products, and the heating element (1) consists of a short tungsten bar (102), a spigot (103) and a long tungsten bar (104); the short tungsten strips (102) are connected with the long tungsten strips (104) through the seam allowances (103), the short tungsten strips (102) and the long tungsten strips (104) are spliced to form a layer of square tungsten strips, four corners of each square tungsten strip are corners (101) of a heating body, the tungsten strips spliced on each layer are overlapped layer by layer to form the heating body (1), and seams of the long tungsten strips (104) and the short tungsten strips (102) are staggered mutually; a gap of 5-25mm is left between the heating body (1) and the refractory material (102).

4. The square tungsten-molybdenum induction sintering furnace according to claim 3, wherein: the induction coil (3) at least comprises a copper pipe (301), bakelite upright posts (302), an extraction electrode (303) and an electrode flange (304), wherein the copper pipe (301) is wound into a coil shape, and the bakelite upright posts (302) are uniformly distributed on the outer surface of the copper pipe (301) wound into the coil shape and fix the copper pipe (301); the copper pipe (301) is connected with the electrode flange (304) through an extraction electrode (303); an expansion gap of 5-30mm is reserved between the induction coil (3) and the refractory device (2).

5. The square tungsten-molybdenum induction sintering furnace according to claim 1, wherein: the lifting system (5) at least comprises a motor and four ball screws, the motor is connected with the four ball screws through speed reducers respectively, lifting platforms are arranged at the bottom ends of the four ball screws, and the motor is arranged at the top ends of the four ball screws.

6. The square tungsten-molybdenum induction sintering furnace according to claim 1, characterized in that the refractory device (2) at least comprises a furnace core (7) and a furnace lining (8) which are made of refractory materials, the furnace core (7) is positioned in the middle of the inside of the furnace lining (8), the furnace lining (8) comprises an inner lining (801), a middle lining (802), a bottom support and an outer lining (803), wherein the middle lining (802) is sleeved on the periphery of the inner lining (801), the outer lining (803) is sleeved on the periphery of the middle lining (802), the cross sections of the inner lining (801), the middle lining (802) and the outer lining (803) are square, a first expansion gap is formed between the inner lining (801) and the middle lining (802), a second expansion gap is formed between the middle lining (802) and the outer lining (803), the first outer expansion gap and the second expansion gap are 5 ~ mm, the inner lining (801), the middle lining (802) and the outer lining (803) are arranged on the furnace core (7), the furnace core (7) comprises the inner lining (701) and the outer lining (803), the inner lining (701) is provided with through holes (701), the inner lining (701) and the inner lining (701) are provided with through holes (702), and the inner lining (701), and the inner lining (702), and the inner lining (.

7. The induction sintering furnace of claim 6, wherein the outer core (701) is formed by stacking outer top bricks (704), outer upper bricks (705), outer middle bricks (706) and outer bottom bricks (707), wherein a plurality of outer middle bricks (706) are stacked on the upper end face of the outer bottom bricks (707), wherein the outer upper bricks (705) are stacked on the uppermost end of the plurality of outer middle bricks (706), wherein the outer top bricks (704) are stacked on the upper end face of the outer upper bricks (705), and wherein the inner core (702) is formed by stacking core bricks (708), wherein the core bricks (708) are of a square or rectangular parallelepiped structure, wherein the core bricks (708) are tiled and stacked on the inner side of the outer core (701), and wherein the expansion gap between two adjacent core bricks (708) ranges from 0.2 ~ 5 mm.

8. The square tungsten-molybdenum induction sintering furnace according to claim 6, wherein: the inner lining (801), the middle lining (802) and the outer lining (803) are all built by shaped bricks (804), wherein the shaped bricks (804) of the inner lining (801) are made of heavy zirconia, the shaped bricks (804) made of the heavy zirconia play a role in high temperature resistance and heat insulation, the shaped bricks (804) of the middle lining (802) are made of zirconia hollow spheres, the shaped bricks (804) made of the zirconia hollow spheres play a role in heat preservation, and the shaped bricks (804) of the outer lining (803) are made of alumina hollow spheres, the shaped bricks (804) made of the alumina hollow spheres play a role in heat preservation and insulation; the inner lining (801) is built on the upper side edge of an upper layer base support (805) by a shaped brick (804), wherein the middle lining (802) is built on the upper side edge of a middle layer base support (806) by a shaped brick (804), wherein the outer lining (803) is built on the upper side edge of a lower layer base support (807) by a shaped brick (804), the top height of the outer lining (803) is larger than that of the inner lining (801) and the middle lining (802), wherein the top heights of the inner lining (801) and the middle lining (802) are the same, the thickness of the shaped brick (804) of the inner lining (801) is larger than that of the shaped brick (804) of the middle lining (802), and the thickness of the shaped brick (804) of the middle lining (802) is larger than that of the shaped brick (804) of the outer lining (803).

9. The square tungsten-molybdenum induction sintering furnace according to claim 6, wherein: the collet includes upper collet (805), middle level collet (806) and lower floor's collet (807), and wherein middle level collet (806) set up in lower floor's collet (807) up end, and wherein upper collet (805) set up in middle level collet (806) up end, upper collet (805), middle level collet (806) and lower floor's collet (807) are the square structure of interior annular space, and wherein the size of lower floor's collet (807) is greater than the size of middle level collet (806), and wherein the size of middle level collet (806) is greater than the size of upper collet (805).

Technical Field

The invention belongs to the field of tungsten and molybdenum processing equipment, and particularly relates to a square tungsten and molybdenum induction 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 a tungsten-molybdenum sintering furnace which is conventionally used is round, and when a plate blank is sintered, the space utilization rate is low, the energy consumption is high, the efficiency is low, and the requirement for large-scale sintering of the plate blank cannot be met. In addition, in the sintering process, due to insufficient charging, the slab is easy to deform in the sintering process, so that the subsequent processing and manufacturing are inconvenient, in order to save cost, the deformed slab needs to be heated and corrected, the production cost is increased, and the quality of the product is influenced by heating and pressure processing in the correction process.

Disclosure of Invention

In order to overcome the problems of low space utilization rate, high energy consumption, low efficiency, high cost and easy deformation of the plate blank in the sintering process in the prior art, the invention provides the square tungsten-molybdenum induction sintering furnace.

The technical scheme adopted by the invention is as follows:

a square tungsten-molybdenum induction sintering furnace comprises a heating body, a fire-resistant device, an induction coil, a furnace body, a lifting system and a skip car; the heating body, the fire-resistant device and the induction coil are all arranged in the center of the bottom in the furnace body, the fire-resistant device is positioned outside the heating body, and the induction coil is arranged outside the fire-resistant device; the skip car is arranged on a lifting platform at the lower end of the lifting system, and the skip car is positioned below the furnace body; the top end of the lifting system is positioned at one side of the middle lower part of the furnace body.

The furnace body is a cylindrical furnace body.

The heating element is made of tungsten products and consists of short tungsten strips, spigots and long tungsten strips; the short tungsten strips and the long tungsten strips are connected through the seam allowance, the short tungsten strips and the long tungsten strips are spliced to form a layer of square tungsten strips, four corners of each square tungsten strip are corners of a heating body, the tungsten strips spliced in each layer are overlapped layer by layer to form the heating body, and seams of the long tungsten strips and the short tungsten strips are mutually staggered in the overlapping process; a gap of 5-25mm is left between the heating body and the refractory material.

The induction coil at least comprises a copper pipe, bakelite stand columns, an extraction electrode and an electrode flange, wherein the copper pipe is wound into a coil shape, and the bakelite stand columns are uniformly distributed on the outer surface of the copper pipe wound into the coil shape and fix the copper pipe; the copper pipe is connected with the electrode flange through an extraction electrode; an expansion gap of 5-30mm is reserved between the induction coil and the refractory device.

The lifting system at least comprises a motor and four ball screws, the motor is connected with the four ball screws through speed reducers respectively, the bottom ends of the four ball screws are provided with lifting platforms, and the motor is arranged at the top ends of the four ball screws.

The fireproof device at least comprises a furnace core and a furnace lining, wherein the furnace core is made of fireproof materials, the furnace core is located in the middle of the interior of the furnace lining, the furnace lining comprises an inner lining, a middle lining, a bottom support and an outer lining, the middle lining is arranged on the periphery of the inner lining, the outer lining is arranged on the periphery of the middle lining in a sleeved mode, the cross sections of the inner lining, the middle lining and the outer lining are square, a first expansion gap is formed between the inner lining and the middle lining, a second expansion gap is formed between the middle lining and the outer lining, the range of the first expansion gap and the range of the second expansion gap are both 5 ~ mm, the inner lining, the middle lining and the outer lining are all arranged on the bottom support, the furnace core comprises an outer layer furnace core and an inner layer furnace core, the inner layer furnace core is filled in the outer layer furnace core, an up-and-down through vent hole is formed in the center of the inner layer furnace core, the cross sections of the outer layer furnace core and the inner layer furnace core are both square, and the expansion.

The outer-layer furnace core is formed by stacking outer-layer top layer bricks, outer-layer upper layer bricks, outer-layer middle layer bricks and outer-layer bottom layer bricks, wherein the multiple layers of outer-layer middle layer bricks are stacked on the upper end face of the outer-layer bottom layer bricks, the outer-layer upper layer bricks are stacked on the uppermost ends of the multiple layers of outer-layer middle layer bricks, the outer-layer top layer bricks are stacked on the upper end face of the outer-layer upper layer bricks, the inner-layer furnace core is formed by stacking core bricks, the core bricks are of a cube or cuboid structure, the core bricks are tiled and stacked on the inner side of the outer-layer furnace core, and the range of an expansion joint between every two adjacent core bricks is 0..

The lining, the middle lining and the outer lining are all built by shaped bricks, wherein the shaped bricks of the lining are made of heavy zirconia, the shaped bricks made of the heavy zirconia have the functions of high temperature resistance and heat insulation, the shaped bricks of the middle lining are made of zirconia hollow spheres, the shaped bricks made of the zirconia hollow spheres have the function of heat insulation, the shaped bricks of the outer lining are made of alumina hollow spheres, and the shaped bricks made of the alumina hollow spheres have the functions of heat insulation and insulation; the inner lining is built on the upper side edge of the upper layer bottom support through the shaped bricks, the middle lining is built on the upper side edge of the middle layer bottom support through the shaped bricks, the outer lining is built on the upper side edge of the lower layer bottom support through the shaped bricks, the top height of the outer lining is larger than that of the inner lining and the middle lining, the top heights of the inner lining and the middle lining are the same, the thickness of the shaped bricks of the inner lining is larger than that of the shaped bricks of the middle lining, and the thickness of the shaped bricks of the middle lining is larger than that of the shaped bricks of the outer lining.

The collet includes upper collet, middle level collet and lower floor's collet, and wherein the middle level collet sets up in lower floor's collet up end, and wherein the upper collet sets up in middle level collet up end, upper collet, middle level collet and lower floor's collet are the square structure of inside annular space, and wherein the size of lower floor's collet is greater than the size of middle level collet, and wherein the size of middle level collet is greater than the size of upper collet.

The invention has the beneficial effects that:

the heating body, the refractory device and the induction coil all adopt rectangular structures, and the structure can enable the sintered tungsten-molybdenum plate blank product to be horizontally 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 procedures of the tungsten-molybdenum product are greatly reduced, the production cost is reduced, and the influence of heating and pressure processing in the shaping process on the product quality is avoided. According to the invention, after the round heating element is changed into the square heating element, 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 square heating element provided by the invention can increase the utilization rate of a hearth, the energy consumption is low, the capacity is high, and the square tungsten-molybdenum induction sintering furnace can be used for a long time at the temperature of 2500 ℃.

The recovery rate of the scrapped square heating element material can reach more than 70 percent, a large amount of valuable tungsten material can be saved, the production consumption is greatly reduced, and the production cost is saved.

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

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention.

FIG. 2 is a front view of a heat-generating body assembly diagram.

FIG. 3 is a plan view of a heat-generating body assembly.

FIG. 4 is a front view of the refractory assembly.

FIG. 5 is a top view of the refractory assembly.

FIG. 6 is a front view of a refractory device core.

Fig. 7 top view of an induction coil.

Fig. 8 is a front view of an induction coil.

In the figures, the reference numbers are: 1. a heating element; 101. a corner of the heating element; 102. short tungsten bars; 103. stopping the opening; 104. a long tungsten bar; 2. a refractory device; 3. an induction coil; 301. a copper pipe; 302. a bakelite column; 303. leading out an electrode; 304. an electrode flange; 4. a furnace body; 5. a lifting system; 6. a skip car; 7. a furnace core; 701. an outer layer furnace core; 702. an inner layer furnace core; 703. a vent hole; 704. an outer layer of top layer bricks; 705. the outer layer is a brick; 706. an outer layer and a middle layer brick; 707. outer layer bottom layer bricks; 8. a furnace lining; 801. a liner; 802. a middle lining; 803. an outer liner; 804. forming bricks; 805. an upper layer bottom support; 806. a middle layer bottom support; 807. the lower layer collet.

Detailed Description