Mounting structure of ceramic tube of heating chamber of vacuum furnace

Abstract

The utility model provides a mounting structure of a ceramic tube of a heating chamber of a vacuum furnace. The mounting structure comprises the heating chamber, the porcelain tube penetrates through the inner wall of the heating chamber, so that the two ends of the porcelain tube are located inside and outside the heating chamber respectively; the insulation assembly is located outside the heating chamber, and the end, located outside the heating chamber, of the porcelain tube abuts against the insulation assembly; the fixing assembly is located in the heating chamber and used for fixing the porcelain tube; the conducting rod penetrates through the porcelain tube, the end, located in the heating chamber, of the conducting rod is fixed by the fixing assembly, the end, located outside the heating chamber, of the conducting rod is fixed by the insulating assembly, and the insulating assembly is used for insulating the end, located outside the heating chamber, of the conducting rod.

Description

Technical Field

[0001] The utility model relates to the field of vacuum furnaces, in particular to an installation structure of a porcelain tube in a heating chamber of a vacuum furnace. Background Art

[0002] In high-temperature vacuum furnaces with temperatures of 1400°C to 1750°C, steel tubes can no longer meet the high-temperature requirements. Therefore, it is necessary to use alumina, zirconia, or silicon carbide ceramic tubes as high-temperature furnace tubes. The high-temperature furnace tubes are set inside the heating chamber of the vacuum furnace. Ceramic materials are brittle and have low strength. After the heating in the heating chamber is completed, the temperature inside the heating chamber will cool naturally. When the ceramic tube is cooled from high temperature to low temperature, it will produce a large expansion stress. When this expansion stress is greater than the strength that the ceramic tube can withstand, the ceramic furnace tube will crack and break, causing the high-temperature furnace to fail to work normally.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The utility model provides an installation structure for a porcelain tube in a vacuum furnace heating chamber, so as to solve the technical problem that the porcelain tube is easy to crack.

[0005] A vacuum furnace heating chamber porcelain tube installation structure, comprising a heating chamber; and

[0006] A porcelain tube, wherein the porcelain tube penetrates the inner wall of the heating chamber so that two ends of the porcelain tube are respectively located inside and outside the heating chamber;

[0007] An insulating component, wherein the insulating component is located outside the heating chamber, and one end of the porcelain tube located outside the heating chamber abuts against the insulating component;

[0008] A fixing assembly, the fixing assembly is located inside the heating chamber and is used to fix the porcelain tube;

[0009] A conductive rod, wherein the conductive rod passes through the porcelain tube, wherein one end of the conductive rod located inside the heating chamber is fixed by the fixing assembly, and one end of the conductive rod located outside the heating chamber is fixed by the insulating assembly, and the insulating assembly is used to insulate the end of the conductive rod located outside the heating chamber.

[0010] Preferably, the insulating assembly comprises a circular ring, a porcelain sleeve and a porcelain ring;

[0011] The ceramic ring passes through the ceramic tube and is arranged on the outer wall of the heating chamber;

[0012] A round nut is arranged on the circular ring, and a thread is arranged on one end of the conductive rod located outside the heating chamber and passes through the circular ring. The round nut is threadedly connected with the end of the conductive rod located outside the heating chamber, so that the circular ring abuts against the ceramic ring;

[0013] One end of the porcelain tube located outside the heating chamber abuts against the lower surface of the ring, and the porcelain sleeve is arranged on the upper surface of the ring.

[0014] Preferably, it also includes a backing plate, a fixed circular plate and a reinforcement ring;

[0015] The backing plate is arranged on the upper surface of the porcelain sleeve, the fixed circular plate passes through the porcelain ring and is arranged on the lower surface of the porcelain ring, and the backing plate, the porcelain sleeve, the circular ring, the porcelain ring and the fixed circular plate are fixed as a whole from top to bottom by screws;

[0016] The fixed circular plate is arranged on the reinforcing ring, and the reinforcing ring passes through the porcelain tube and is fixed on the outer wall of the heating chamber.

[0017] Preferably, the fixing assembly includes two graphite nuts, the end of the conductive rod located inside the heating chamber is provided with a thread, and the edge of the porcelain tube at one end located inside the heating chamber is folded outward to form a wing plate; the two graphite nuts are threadedly connected to the end of the conductive rod located inside the heating chamber and abut against the wing plate.

[0018] During installation, the porcelain tube passes through the inner wall of the heating chamber, and then the two ends of the porcelain tube can be fixed inside and outside the heating chamber respectively through the above-mentioned insulating assembly and fixing assembly, thereby completing the installation of the porcelain tube; when the heating chamber is completed, since the porcelain tube is partly outside and partly inside, compared with the porcelain tube that is completely inside, the porcelain tube can exchange heat with the outside through the end that is on the outside, and the porcelain tube itself will not have a very high temperature, so that the porcelain tube will not generate a large expansion stress when cooling, thereby effectively preventing the porcelain tube from cracking, and the conductive rod on the outside can be insulated through the insulating assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is the front view of the utility model.

[0021] In the above drawings, the components represented by the reference numerals are listed as follows:

[0022] 1. Pad; 2. Porcelain sleeve; 3. Round ring; 4. Porcelain ring; 5. Screw; 6. Fixed round plate; 7. Reinforcement ring; 8. Conductive rod; 9. Round nut; 10. Porcelain tube; 11. Graphite nut; 12. Heating chamber. DETAILED DESCRIPTION

[0023] In order to make the above and other features and advantages of the utility model more clear, the utility model is further described below in conjunction with the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explaining to those skilled in the art and are only exemplary and not restrictive.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0029] refer to Figure 1 In one embodiment of the utility model, a mounting structure of a porcelain tube 10 in a heating chamber 12 of a vacuum furnace is provided, comprising a heating chamber 12; and a porcelain tube 10, the porcelain tube 10 passing through the inner wall of the heating chamber 12 so that the two ends of the porcelain tube 10 are respectively located inside and outside the heating chamber 12; an insulating component, the insulating component is located outside the heating chamber 12, and one end of the porcelain tube 10 located outside the heating chamber 12 abuts against the insulating component; a fixing component, the fixing component is located inside the heating chamber 12 and is used to fix the porcelain tube 10; a conductive rod 8, the conductive rod 8 passes through the porcelain tube 10, one end of the conductive rod 8 located inside the heating chamber 12 is fixed by the fixing component, and one end of the conductive rod 8 located outside the heating chamber 12 is fixed by the insulating component, and the insulating component is used to insulate the end of the conductive rod 8 located outside the heating chamber 12.

[0030] On the basis of the above embodiments, some other embodiments of the present application may be further increased or limited by one or more of the following combinations on the basis of the above specific embodiments.

[0031] The insulating assembly includes a circular ring 3, a porcelain sleeve 2 and a porcelain ring 4; the porcelain ring 4 passes through the porcelain tube 10 and is arranged on the outer wall of the heating chamber 12; a round nut 9 is arranged on the circular ring 3, and a thread is arranged on one end of the conductive rod 8 located outside the heating chamber 12 and passes through the circular ring 3, and the round nut 9 is threadedly connected with the one end of the conductive rod 8 located outside the heating chamber 12, so that the circular ring 3 abuts against the porcelain ring 4;

[0032] One end of the porcelain tube 10 located outside the heating chamber 12 abuts against the lower surface of the ring 3 , and the porcelain sleeve 2 is arranged on the upper surface of the ring 3 .

[0033] It also includes a pad 1, a fixed circular plate 6 and a reinforcing ring 7; the pad 1 is arranged on the upper surface of the porcelain sleeve 2, the fixed circular plate 6 passes through the porcelain ring 4 and is arranged on the lower surface of the porcelain ring 4, and the pad 1, the porcelain sleeve 2, the circular ring 3, the porcelain ring 4 and the fixed circular plate 6 are fixed as a whole from top to bottom by screws 5; the fixed circular plate 6 is arranged on the reinforcing ring 7, and the reinforcing ring 7 passes through the porcelain tube 10 and is fixed on the outer wall of the heating chamber 12.

[0034] The above-mentioned pad 1, porcelain sleeve 2, circular ring 3, porcelain ring 4 and fixed circular plate 6 are installed in sequence from top to bottom and assembled by screws 5 to form an insulating assembly. The specific insulation is achieved by the porcelain sleeve 2 and the porcelain ring 4, and the pad 1 and the fixed circular plate 6 can clamp and install the porcelain sleeve 2 and the porcelain ring 4. The reinforcing ring 7 makes the installation between the entire insulating assembly and the outer wall of the heating chamber 12 more stable.

[0035] The fixing assembly includes two graphite nuts 11, and one end of the conductive rod 8 located inside the heating chamber 12 is provided with a thread. The edge of the porcelain tube 10 located inside the heating chamber 12 is folded outward to form a wing plate; the two graphite nuts 11 are threadedly connected to the end of the conductive rod 8 located inside the heating chamber 12 and abut against the wing plate.

[0036] The inner end of the porcelain tube 10 can be fixed by the graphite nut 11 and threadedly connected to the conductive rod 8, without the need for an additional fixing structure, making installation more convenient.

[0037] In summary, when the heating chamber 12 is finished working, since the porcelain tube 10 is partially outside and partially inside, compared with the porcelain tube 10 that is completely inside, the porcelain tube 10 can exchange heat with the outside through the end that is outside, and the porcelain tube 10 itself will not have a very high temperature, so that the porcelain tube 10 will not generate a large expansion stress when cooling, thereby effectively preventing the porcelain tube 10 from cracking. In addition, part of the porcelain tube 10 is placed outside the heating chamber 12. When selecting the porcelain tube 10, the purity of the selected porcelain tube 10 can be reduced, thereby reducing the cost.

[0038] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A vacuum furnace heating chamber porcelain tube installation structure, characterized in that: including a heating chamber; and A porcelain tube, wherein the porcelain tube penetrates the inner wall of the heating chamber so that two ends of the porcelain tube are respectively located inside and outside the heating chamber; An insulating component, wherein the insulating component is located outside the heating chamber, and one end of the porcelain tube located outside the heating chamber abuts against the insulating component; A fixing assembly, the fixing assembly is located inside the heating chamber and is used to fix the porcelain tube; A conductive rod, wherein the conductive rod passes through the porcelain tube, wherein one end of the conductive rod located inside the heating chamber is fixed by the fixing assembly, and one end of the conductive rod located outside the heating chamber is fixed by the insulating assembly, and the insulating assembly is used to insulate the end of the conductive rod located outside the heating chamber.

2. The installation structure of the porcelain tube of the vacuum furnace heating chamber according to claim 1 is characterized in that: The insulating component comprises a circular ring, a porcelain sleeve and a porcelain ring; The ceramic ring passes through the ceramic tube and is arranged on the outer wall of the heating chamber; A round nut is arranged on the circular ring, and a thread is arranged on one end of the conductive rod located outside the heating chamber and passes through the circular ring. The round nut is threadedly connected with the end of the conductive rod located outside the heating chamber, so that the circular ring abuts against the ceramic ring; One end of the porcelain tube located outside the heating chamber abuts against the lower surface of the ring, and the porcelain sleeve is arranged on the upper surface of the ring.

3. The installation structure of the porcelain tube of the vacuum furnace heating chamber according to claim 2 is characterized in that: It also includes a backing plate, a fixed circular plate and a reinforcement ring; The backing plate is arranged on the upper surface of the porcelain sleeve, the fixed circular plate passes through the porcelain ring and is arranged on the lower surface of the porcelain ring, and the backing plate, the porcelain sleeve, the circular ring, the porcelain ring and the fixed circular plate are fixed as a whole from top to bottom by screws; The fixed circular plate is arranged on the reinforcing ring, and the reinforcing ring passes through the porcelain tube and is fixed on the outer wall of the heating chamber.

4. The installation structure of the porcelain tube of the vacuum furnace heating chamber according to claim 3 is characterized in that: The fixing assembly includes two graphite nuts, and one end of the conductive rod located inside the heating chamber is provided with threads. The edge of the porcelain tube at one end located inside the heating chamber is folded outward to form a wing plate; the two graphite nuts are threadedly connected to one end of the conductive rod located inside the heating chamber and abut against the wing plate.

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