CN210980778U

CN210980778U - Square heating element device of tungsten-molybdenum sintering furnace

Info

Publication number: CN210980778U
Application number: CN201921754589.9U
Authority: CN
Inventors: 邢朋娟; 惠圆圆; 刘艳; 严磊; 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 heating element device of a tungsten-molybdenum sintering furnace, which comprises a short tungsten bar, a spigot and a long tungsten bar; short tungsten strip and long tungsten strip pass through the tang and be connected, short tungsten strip and long tungsten strip concatenation constitute the square tungsten strip of one deck, four angles of square tungsten strip are the heat-generating body turning, every layer of tungsten strip successive layer stack that splices constitutes the heat-generating body, the seam of long tungsten strip and short tungsten strip staggers each other during the stack. The utility model discloses be free state between the every tungsten bar in, do not need the welding. After the service life of the heating element is reached, the tungsten bar can be disassembled, and the tungsten bar with small deformation can be recovered and used for manufacturing a new heating element, in the actual production, the recovery rate of the scrapped heating element material can reach more than 70 percent, a large amount of valuable tungsten materials can be saved, the production consumption is greatly reduced, and the production cost is saved.

Description

Square heating element device of tungsten-molybdenum sintering furnace

Technical Field

The utility model belongs to tungsten molybdenum processing equipment field especially relates to a square heat-generating body device of 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 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.

SUMMERY OF THE UTILITY MODEL

Big in order to overcome current energy consumption, the productivity is little, problem with high costs, the utility model provides a square heat-generating body device of tungsten molybdenum fritting furnace, the utility model discloses a after changing circular heat-generating body into square heat-generating body, the tungsten molybdenum product by the sintering can keep flat on the blowing collet, and furthest has improved by sintering material's bending deformation, reduces the alignment levelling technology of tungsten molybdenum product by a wide margin, has improved product quality. The square heating body can increase the utilization rate of the hearth, the energy consumption is low, and the capacity is high. The recovery rate of the scrapped square heating element can reach more than 70 percent, a large amount of valuable tungsten materials can be saved, the production consumption is greatly reduced, and the production cost is saved.

The utility model adopts the technical proposal that:

a square heating element device of a tungsten-molybdenum sintering furnace comprises a short tungsten bar, a spigot and a long tungsten bar; short tungsten strip and long tungsten strip pass through the tang and be connected, short tungsten strip and long tungsten strip concatenation constitute the square tungsten strip of one deck, four angles of square tungsten strip are the heat-generating body turning, every layer of tungsten strip successive layer stack that splices constitutes the heat-generating body, the seam of long tungsten strip and short tungsten strip staggers each other during the stack.

The long tungsten bar is longer than the short tungsten bar, and the short tungsten bar and the long tungsten bar are both formed by cutting rolled tungsten plates.

The seam allowance comprises a convex seam allowance and a concave seam allowance, the convex seam allowance and the concave seam allowance are respectively arranged on the long tungsten strip and the short tungsten strip, the two seam allowances are meshed with each other, and an expansion gap is reserved between the convex seam allowance and the concave seam allowance when the convex seam allowance and the concave seam allowance are meshed.

The expansion gap is 0.2-5 mm.

The corner of the heating body is a round angle.

The utility model has the advantages that:

the utility model discloses a after changing circular heat-generating body into square heat-generating body, 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 heat-generating body can increase furnace's utilization ratio, and energy resource consumption is few, and the productivity is big.

The utility model provides a rate of recovery of material can reach more than 70% after square heat-generating body is scrapped, can practice thrift a large amount of valuable tungsten materials, is that the production consumption reduces substantially, practices thrift manufacturing cost.

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

Drawings

FIG. 1 is a front view of a heat generating body assembly.

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

Fig. 3 a long tungsten bar.

Fig. 4 short tungsten bars.

Fig. 5 is a schematic view of a male end structure.

FIG. 6 is a schematic view of a female end structure.

Figure 7 corner single tang.

Figure 8 corner double seam allowance.

Fig. 9 corner stitching.

Fig. 10 corner laps.

In the figures, the reference numbers are: 1. a heating element; 2. short tungsten bars; 3. stopping the opening; 4. a long tungsten bar; 5. a corner of the heating element; 6. a male end; 7. a concave spigot.

Detailed Description

Example 1:

in order to overcome the problem that current energy consumption is big, the productivity is little, with high costs, the utility model provides a tungsten molybdenum fritting furnace square heat-generating body device as shown in fig. 1-10, the utility model discloses a after changing circular heat-generating body into square heat-generating body, the tungsten molybdenum product by the sintering can keep flat on the blowing collet, and furthest has improved by sintering material's bending deformation, reduces the alignment levelling technology of tungsten molybdenum product by a wide margin, has improved product quality. The square heating body can increase the utilization rate of the hearth, the energy consumption is low, and the capacity is high. The recovery rate of the scrapped square heating element can reach more than 70 percent, a large amount of valuable tungsten materials can be saved, the production consumption is greatly reduced, and the production cost is saved.

A square heating element device of a tungsten-molybdenum sintering furnace comprises a short tungsten bar 2, a spigot 3 and a long tungsten bar 4; short tungsten 2 and long tungsten 4 pass through tang 3 and be connected, short tungsten 2 and long tungsten 4 concatenation form the square tungsten of form of one deck, four angles of square tungsten are the heat-generating body turning 5, every layer of tungsten successive layer stack that splices constitutes heat-generating body 1, the seam of long tungsten 4 and short tungsten 2 staggers each other during the stack.

The utility model discloses well every layer of tungsten strip successive layer that splices superposes, constitutes square heat-generating body 1, and the seam of long tungsten strip 4 and short tungsten strip 2 staggers each other during the stack, and is free state between the every tungsten strip, does not need the welding. After the service life of the heating element 1 is reached, the tungsten bar can be disassembled, and the tungsten bar with small deformation can be recycled for use in the manufacture of a new heating element, in the actual production, the recovery rate of the scrapped heating element material can reach more than 70 percent, a large amount of valuable tungsten materials can be saved, the production consumption is greatly reduced, and the production cost is saved. Meanwhile, the combination can adjust the size of the heating element by adjusting the length of the tungsten bar, and further adjust the gap between the heating element and the induction coil, so that the heat efficiency of the intermediate frequency furnace reaches the optimal state.

The utility model discloses use in a square tungsten molybdenum response sintering furnace, as the heat-generating body by square crucible, utilize square induction coil to carry out induction heating. The highest temperature of the equipment is required to be 2500 ℃, and the material of the heating body 1 is selected to be a tungsten product; the heating element 1 is formed by rolling and cutting the tungsten bar; the required density of the tungsten bar of the heating body 1 can reach 18.5t/m³The above.

Example 2:

based on the embodiment 1, in this embodiment, the long tungsten bar 4 is longer than the short tungsten bar 2, and the short tungsten bar 2 and the long tungsten bar 4 are both cut from a rolled tungsten plate.

The seam allowance 3 comprises a convex seam allowance 6 and a concave seam allowance 7, the convex seam allowance 6 and the concave seam allowance 7 are respectively arranged on the long tungsten strip 4 and the short tungsten strip 2 and are meshed with each other, and an expansion gap is reserved when the convex seam allowance 6 and the concave seam allowance 7 are meshed with each other.

The expansion gap is 0.2-5 mm.

The utility model discloses carry out the interlock through tang 3 between well short tungsten strip 2 and the long tungsten strip 4, tang 3 divide into protruding tang 6 shown in figure 5 and the concave tang 7 shown in figure 6, and protruding tang 6 and concave tang 7 should leave an amount of dilatation joint when the interlock, the deformation of tungsten strip when avoiding induction magnetic field to pass through.

Preferably, the corner 5 of the heating element is a round corner.

Preferably, the heating element corner 5 is a right angle.

The utility model discloses well heat-generating body turning 5 is through special treatment, the expend with heat and contract with cold of tungsten strip when avoiding high temperature to the influence of heat-generating body 1. The treatment protocol was as follows:

first, the corners are treated in the manner shown in fig. 7, the corners 5 are rounded, and the tungsten bars are engaged by using the seam allowance 3 during expansion, so as to avoid affecting the change of the overall size of the heating element 1.

Secondly, the corners are processed in a mode shown in fig. 8, the corners 5 are subjected to fillet transition, and the corners are occluded by adopting the whole tungsten strip with the seam allowance, so that the change of the whole size of the heating body 1 is avoided.

Thirdly, the corners are processed in the mode shown in fig. 9, the corners 5 are subjected to fillet transition, and a gap is ensured to be reserved between adjacent tungsten bars during transition, so that each tungsten bar is in a free expansion state, and the change of the whole size of the heating body 1 is avoided being influenced.

Fourthly, the corner is processed in the mode shown in fig. 10, the corner 5 is subjected to 90-degree right-angle transition, and a gap is ensured to be reserved between adjacent tungsten bars during transition, so that each tungsten bar is in a free expansion state, and the change of the whole size of the heating body 1 is avoided being influenced.

The utility model provides a square heat-generating body is formed by the tungsten strip concatenation of different length, because the size of heat-generating body 1 is great, according to the machining capacity of tungsten goods, splits into several parts with the tungsten strip and splices, and every limit is formed by 2 tungsten strip concatenations with the length difference, and the tungsten strip requires rolling cutting to form, and it is the same to require the cross-section, and density should reach 18.5t/m³The above. Unsmooth tang 3 is used to interlock between long tungsten strip 4 and the short tungsten strip 2, and when the interlock between the unsmooth tang, leave the dilatation joint, the deformation of tungsten strip when avoiding induction magnetic field to pass through.

The utility model provides a 5 departments in heat-generating body turning need be through special treatment, expend with heat and contract with cold between the tungsten bar when avoiding high temperature. Each layer of the spliced tungsten strips are overlapped layer by layer to form a cuboid shape, long tungsten strips 4 and short tungsten strips 2 are staggered during overlapping, each tungsten strip is in a free state and does not need to be welded, and when the tungsten strip stacking device is used, the butt joint surfaces of the upper tungsten strip and the lower tungsten strip are softened at high temperature and under the self-weight pressure of materials to easily form a conductive loop, so that a closed loop can be formed in adjacent tungsten strips through medium-frequency induced current.

Because each tungsten bar forming the heating element 1 is made of metal tungsten which is forged compactly in advance, the electric conductivity of the tungsten bar is much better than that of tungsten in a powder metallurgy state, the heat efficiency of the heating element is a normal set value from the beginning, and the transition process of metallization is avoided.

After the service life of the heating element 1 is reached, the tungsten bar can be disassembled, and the tungsten bar with small deformation can be recycled for use in the manufacture of a new heating element, in the actual production, the recovery rate of the scrapped heating element 1 can reach more than 70 percent, a large amount of valuable tungsten materials can be saved, the production consumption is greatly reduced, and the production cost is saved. Meanwhile, the combination can adjust the size of the heating element 1 by adjusting the length of the tungsten bar of the heating element 1, and further adjust the gap between the heating element 1 and the induction coil, so that the heat efficiency of the intermediate frequency furnace reaches the optimal state.

The square heating body can increase the utilization rate of the hearth, the energy consumption is low, and the capacity is high. The recovery rate of the scrapped square heating element can reach more than 70 percent, a large amount of valuable tungsten materials can be saved, the production consumption is greatly reduced, and the production cost is saved.

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. The utility model provides a square heat-generating body device of tungsten molybdenum fritting furnace which characterized in that: comprises a short tungsten bar (2), a spigot (3) and a long tungsten bar (4); short tungsten (2) and long tungsten (4) be connected through tang (3), short tungsten (2) and long tungsten (4) concatenation are constituteed one deck square form tungsten, four angles of square form tungsten are heat-generating body turning (5), every layer of tungsten successive layer stack that the concatenation is good constitutes heat-generating body (1), the seam of long tungsten (4) and short tungsten (2) staggers each other during the stack.

2. The square heating element device of the tungsten-molybdenum sintering furnace according to claim 1, characterized in that: the long tungsten bar (4) is longer than the short tungsten bar (2), and the short tungsten bar (2) and the long tungsten bar (4) are formed by cutting rolled tungsten plates.

3. The square heating element device of the tungsten-molybdenum sintering furnace according to claim 1, characterized in that: the seam allowance (3) comprises a convex seam allowance (6) and a concave seam allowance (7), the convex seam allowance (6) and the concave seam allowance (7) are respectively arranged on the long tungsten strip (4) and the short tungsten strip (2), the two seam allowances are meshed, and an expansion gap is reserved when the convex seam allowance (6) and the concave seam allowance (7) are meshed.

4. The square heating element device of the tungsten-molybdenum sintering furnace according to claim 3, characterized in that: the expansion gap is 0.2-5 mm.

5. The square heating element device of the tungsten-molybdenum sintering furnace according to claim 1, characterized in that: the corner (5) of the heating body is a round angle.