New integrated high-temperature sintering furnace top cover and its manufacturing method

Abstract

The present invention relates to a novel integrated high-temperature sintering furnace top cover and a manufacturing method thereof, including an integrated top cover body. The integrated top cover body includes an integrally formed conical tungsten or molybdenum bottom plate, an inner thermal insulation material layer laid on the top surface of the integrally formed conical tungsten-molybdenum bottom plate, a middle thermal insulation material layer laid on the top surface of the inner thermal insulation material layer, and an outer thermal insulation material layer laid on the top surface of the middle thermal insulation material layer. A perimeter is fixed at the outer edge of the integrally formed conical tungsten or molybdenum bottom plate for enclosing the outer circles of the inner thermal insulation material layer, the middle thermal insulation material layer, and the outer thermal insulation material layer. The structure of the present invention is simple and the overall cost is relatively low; the heat-resistant thermal insulation material layer of the present invention is thin, has no special shape requirements, and is easy to maintain; the overall adopts a hoisting structure, is easy to use, easy to disassemble and assemble, and has high disassembly and assembly efficiency; it has good versatility and can be used for the top cover transformation of various circular vertical sintering furnaces.

Description

Technical Field:

[0001] The present invention relates to the technical field of target processing, and in particular to a new type of integrated high-temperature sintering furnace top cover and a manufacturing method thereof. Background Art:

[0002] The existing sintering furnace top cover, as shown in Figure 1 and Figure 2 , is composed of fan-shaped small pieces made of independent high-temperature materials. Among them, 1' is the observation hole, 2' is the outer thermal insulation layer, and 3' is the high-temperature inner thermal insulation layer; according to actual production and equipment, it is generally divided into a high-temperature inner lining thermal insulation layer and an outer thermal insulation layer; during production, starting from the high-temperature inner thermal insulation layer, piece by piece is assembled, and then the outer thermal insulation layer is assembled; the overall cost is high, the replacement cycle is long; the assembly efficiency during production is low; and due to large sintering temperature differences and multiple assemblies, it is prone to damage. Summary of the Invention:

[0003] The purpose of the present invention is to provide a new type of integrated high-temperature sintering furnace top cover with low cost, easy assembly, and convenient maintenance, and a manufacturing method thereof.

[0004] The present invention is realized through the following technical solutions:

[0005] The present invention provides a new type of integrated high-temperature sintering furnace top cover, including an integrated top cover body. An observation hole communicating with the sintering furnace and the outside is opened in the center of the integrated top cover body. The integrated top cover body includes an integrally formed conical tungsten or molybdenum bottom plate, an inner thermal insulation material layer laid on the top surface of the integrally formed conical tungsten-molybdenum bottom plate, a middle thermal insulation material layer laid outside the inner thermal insulation material layer, and an outer thermal insulation material layer laid outside the middle thermal insulation material layer. A periphery is fixed at the outer edge of the integrally formed conical tungsten or molybdenum bottom plate for surrounding the outer circles of the inner thermal insulation material layer, the middle thermal insulation material layer, and the outer thermal insulation material layer.

[0006] The inner thermal insulation material layer is laid with zirconia hollow spheres, the middle thermal insulation material layer is laid with zirconia hollow spheres, and the outer thermal insulation material layer is laid with alumina hollow spheres.

[0007] In order to ensure the tightness of the laying, axial and radial protective molybdenum retaining rings for dividing the inner thermal insulation material layer, the middle thermal insulation material layer, and the outer thermal insulation material layer into blocks are evenly fixed on the top surface of the integrally formed conical tungsten or molybdenum bottom plate.

[0008] In order to facilitate the hoisting of the top cover, so as to facilitate its installation on the sintering furnace or removal from the sintering furnace for maintenance, a plurality of lifting lugs are fixed at the outer edge of the integrally formed conical tungsten or molybdenum bottom plate, and the top ends of the lifting lugs penetrate through the inner thermal insulation material layer, the middle thermal insulation material layer, and the outer thermal insulation material layer.

[0009] To avoid gaps at the joints of each component that may affect the heat insulation performance, molybdenum powder is filled at the joints of the integrally formed conical tungsten or molybdenum bottom plate, side perimeter, and lifting lugs.

[0010] The present invention also provides a method for manufacturing the above-mentioned novel integrally formed high-temperature sintering furnace top cover, which includes the following steps:

[0011] (1) First, roll a molybdenum blank or tungsten blank into a square plate with appropriate size and thickness.

[0012] (2) Water-cut the square plate into a circular molybdenum plate or tungsten plate with an observation hole in the middle.

[0013] (3) Heat the circular molybdenum plate or tungsten plate in a hydrogen heating furnace to the process temperature, transfer it out of the furnace and into a forging and forming mold, and then convey it to a hydraulic press for hot pressing to obtain a conical tungsten or molybdenum bottom plate.

[0014] (4) Install lifting lugs, side perimeter, and axial and radial protective molybdenum retaining rings on the top surface of the formed conical tungsten or molybdenum bottom plate. After assembly and connection, fill the joints with molybdenum powder added with a binder, and place it in a sintering furnace to sinter into one body.

[0015] (5) Then, lay an inner heat insulation material layer, a middle heat insulation material layer, and an outer heat insulation material layer in sequence on the top surface of the conical tungsten or molybdenum bottom plate.

[0016] (6) The assembled integrally formed high-temperature sintering furnace top cover is hoisted and ready for use.

[0017] The beneficial effects of the present invention are as follows:

[0018] (1) The structure of the present invention is simple and the overall cost is relatively low.

[0019] (2) The heat-resistant and heat-insulating material layer of the present invention is thin, has no special shape requirements, and is easy to maintain.

[0020] (3) The overall structure adopts a hoisting structure, which is easy to use, easy to disassemble and assemble, and has high disassembly and assembly efficiency.

[0021] (4) It has good versatility and can be used for the top cover transformation of various circular vertical sintering furnaces. Description of the Drawings:

[0022] Figure 1 It is a top view of a high-temperature sintering furnace top cover in the prior art;

[0023] Figure 2 It is a cross-sectional view of a high-temperature sintering furnace top cover in the prior art;

[0024] Figure 3 It is a three-dimensional structure schematic diagram of the novel integrally formed high-temperature sintering furnace top cover of the present invention;

[0025] Figure 4This is the front view of the novel integrated top cover of the high-temperature sintering furnace of the present invention;

[0026] Figure 5 It is Figure 4 the sectional view taken along the line A-A of Specific embodiments:

[0027] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention. The directional terms mentioned in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", etc., are only references to the directions of the attached drawings. Therefore, the directional terms used are for explaining and understanding the present invention, rather than for limiting the present invention.

[0028] As Figures 3 - 5 shown, a novel integrated top cover of a high-temperature sintering furnace includes an integrated top cover body. An observation hole 1 communicating with the inner cavity of the sintering furnace and the outside is provided at the center of the integrated top cover body. The integrated top cover body includes an integrally formed tapered tungsten or molybdenum bottom plate 5, an inner thermal insulation material layer 6 laid on the top surface of the integrally formed tapered tungsten-molybdenum bottom plate 5, a middle thermal insulation material layer 7 laid on the top surface of the inner thermal insulation material layer 6, and an outer thermal insulation material layer 8 laid on the top surface of the middle thermal insulation material layer 7. A ring-shaped perimeter 2 for surrounding the outer circles of the inner thermal insulation material layer 6, the middle thermal insulation material layer 7, and the outer thermal insulation material layer 8 is fixed at the outer edge of the integrally formed tapered tungsten or molybdenum bottom plate 5. In addition, a plurality of lifting lugs 3 are fixed at the outer edge of the integrally formed tapered tungsten or molybdenum bottom plate 5. Axial and radial protective molybdenum retaining rings 4 for dividing the inner thermal insulation material layer 6, the middle thermal insulation material layer 7, and the outer thermal insulation material layer 8 into blocks are uniformly fixed on the top surface of the integrally formed tapered tungsten or molybdenum bottom plate 5. The perimeter 2, the lifting lugs 3, and the molybdenum retaining rings 4 are preferably fixed to the integrally formed tapered tungsten or molybdenum bottom plate 5 by welding, and molybdenum powder added with a binder is filled at the joints.

[0029] Among them, the integrally formed tapered tungsten or molybdenum bottom plate 5 can withstand a high temperature of 2200 degrees. The inner thermal insulation material layer 6 is paved with zirconia hollow spheres, the middle thermal insulation material layer is paved with zirconia hollow spheres, and the outer thermal insulation material layer is paved with alumina hollow spheres, and its overall thermal insulation effect is better. Further, the above zirconia hollow spheres or alumina hollow spheres can also be replaced with zirconia or alumina broken bricks or debris.

[0030] The manufacturing method of the above novel integrated top cover of the high-temperature sintering furnace is as follows:

[0031] (1) First, roll molybdenum billets or tungsten billets into square plates with appropriate sizes and thicknesses;

[0032] (2) Water-cut the square plate into a circular molybdenum plate or tungsten plate with an observation hole in the middle;

[0033] (3) Heat the circular molybdenum plate or tungsten plate to the process temperature in a hydrogen heating furnace, transfer it out of the furnace and into a forging and forming die, and then convey it to a hydraulic press for hot pressing to obtain a conical tungsten or molybdenum bottom plate;

[0034] (4) Install lifting lugs, side enclosures, and axial and radial protective molybdenum retaining rings on the top surface of the formed conical tungsten or molybdenum bottom plate. After assembly and connection, fill the connection with molybdenum powder added with a binder, and place it in a sintering furnace to sinter into one body;

[0035] (5) Then, lay an inner layer of thermal insulation material, a middle layer of thermal insulation material, and an outer layer of thermal insulation material on the top surface of the conical tungsten or molybdenum bottom plate in sequence;

[0036] (6) Hoist and set aside the assembled top cover of the integral high-temperature sintering furnace.

[0037] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "setting", "provided with", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A new type of integrated top cover for a high-temperature sintering furnace, characterized in that: It includes an integrated top cover body, wherein the center of the integrated top cover body is provided with an observation hole connecting the sintering furnace and the outside world, the integrated top cover body includes an integrated formed conical tungsten or molybdenum bottom plate, an inner thermal insulation material layer laid on the top surface of the integrated formed conical tungsten or molybdenum bottom plate, a middle thermal insulation material layer laid on the top surface of the inner thermal insulation material layer, and an outer thermal insulation material layer laid on the top surface of the middle thermal insulation material layer, and a side frame is fixed at the outer edge of the outer ring of the integrated formed conical tungsten or molybdenum bottom plate for enclosing the inner thermal insulation material layer, the middle thermal insulation material layer, and the outer thermal insulation material layer. The inner thermal insulation material layer is paved with hollow zirconia balls, the middle thermal insulation material layer is paved with hollow zirconia balls, and the outer thermal insulation material layer is paved with hollow alumina balls; The top surface of the integrally formed conical tungsten or molybdenum bottom plate is evenly fixed with axial and radial protective molybdenum retaining rings for separating the inner layer, the middle layer and the outer layer into blocks; A plurality of lugs are fixed to the outer edge of the integrally formed conical tungsten or molybdenum bottom plate, and the top ends of the lugs pass through the inner thermal insulation material layer, the middle thermal insulation material layer, and the outer thermal insulation material layer.

2. The novel integrated top cover of the high-temperature sintering furnace according to claim 1, characterized in that: The joints between the integrally formed conical tungsten or molybdenum bottom plate, the side surround, and the hanging ears are filled with molybdenum powder.

3. A manufacturing method of the novel integrated high-temperature sintering furnace top cover as described in claim 1 or 2, characterized in that, The steps include: (1) First, the molybdenum billet or tungsten billet is rolled into a square plate with suitable size and thickness; (2) Cut the square plate into a circular molybdenum or tungsten plate with an observation hole in the middle; (3) The circular molybdenum plate or tungsten plate is heated to the process temperature in a hydrogen heating furnace, taken out of the furnace and transferred to a forging die, and then transported to a hydraulic press for hot pressing to obtain a conical tungsten or molybdenum base plate; (4) Installing the lugs, the sidewalls, and the axial and radial protective molybdenum retaining rings on the top surface of the tapered tungsten or molybdenum base plate formed above, and after assembling and connecting, filling the joint with molybdenum powder added with a binder, placing it in a sintering furnace, and sintering it into one piece; (5) Then, the inner layer insulation material, the middle layer insulation material, and the outer layer insulation material are laid on the top surface of the conical tungsten or molybdenum bottom plate in sequence; (6) The assembled integrated high-temperature sintering furnace top cover is hoisted and ready for use.

Images