Zirconium corundum high-temperature-resistant special-shaped furnace tube

Abstract

The utility model provides a fused alumina zirconia high-temperature-resistant special-shaped furnace tube, which relates to the technical field of industrial furnaces and comprises a tube furnace main body, a furnace tube is clamped in the middle of the tube furnace main body, inner sealing rings are fixedly connected to inner cavities at two ends of the furnace tube, outer sealing rings are fixedly connected to two ends of the furnace tube, and the outer sealing rings are fixedly connected to the tube furnace main body. A soft cushion is mounted at the end part of the outer sealing ring; and the sealing assembly is used for sealing the furnace tubes with different diameters, and the sealing assembly is respectively connected with the inner sealing ring and the outer sealing ring. According to the utility model, by arranging the sealing assembly, furnace tubes with different diameters are placed in the middle of the tubular furnace main body and are attached to the tubular furnace main body, and the sealing assembly at the upper part of the inner cavity of the tubular furnace main body is used for pressing the furnace tubes, so that the furnace tubes sink, and at the moment, the sealing assembly is folded towards the middle when the furnace tubes are pressed downwards, thereby better sealing the furnace tubes; and furthermore, special furnace tubes with different diameters can also be adapted.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial furnaces, in particular to a zirconium corundum high-temperature resistant special-shaped furnace tube. Background Art

[0002] The furnace tube is a key component in a tubular furnace for containing and heating materials. It can be made of different materials, such as zirconium corundum, quartz glass, ceramics or other high-temperature refractory materials. The design and material selection of the furnace tube depend on the purpose of the furnace, the heating temperature, the chemical environment and the expected durability. With the advancement of modern technology, the furnace tube is not just the original single round tube. In conjunction with the different heating or heat treatment conditions of different internal materials, the use of furnace tubes of different shapes can more effectively improve the heating efficiency of the internal materials.

[0003] Chinese patent CN217504337U discloses a tube furnace chamber, which has a cylindrical heating part, which is composed of two semicircular heating bodies symmetrically spliced ​​together; heating elements, which are evenly arranged on the inner walls of the two semicircular heating bodies; a positioning module, which is arranged on the two semicircular heating bodies and is used for positioning and installing with the external furnace body shell; a sealing module, which is arranged between the two semicircular heating bodies and is used for sealing the two semicircular heating bodies; two pipe supports, which are arranged at both ends of any semicircular heating body and are used to place external furnace pipes. The utility model adopts a split-type design, which is convenient for taking and placing furnace pipes and effectively improves heating efficiency. The utility model adopts a cylindrical design, and the thickness of the insulation layer is uniform and consistent, which can improve the uniformity of the temperature field. When closed, the inner wall of the furnace chamber is a complete cylindrical shape, providing an annular heating field, and the temperature field in the furnace is uniform, which improves the operation accuracy.

[0004] The diameter of the above-mentioned tube support is adapted to the diameter of the furnace tube, the outer diameter of the above-mentioned first boss is consistent with the inner diameter of the semicircular heating body, the tube support has a boss extending into the heating body, the installation is well matched, and the heat loss is small. However, the tubular furnace in this technical solution can only adapt to furnace tubes of one diameter, and its first boss and second boss cannot be deformed, and cannot be adjusted according to the different diameters of the furnace tubes. In particular, for special cylindrical furnace tubes with a large diameter in the middle heating zone and small diameters at both ends, it is impossible to effectively adjust the seal at both ends of the special-shaped furnace tube by only using a sealing module, thereby failing to achieve sealing of the entire special-shaped furnace tube, which increases the heat loss of the tubular furnace during operation and is even prone to safety problems during operation. Utility Model Content

[0005] The purpose of the utility model is to provide a zirconium corundum high-temperature resistant special-shaped furnace tube in view of the deficiencies in the prior art, and to achieve functions of stronger adaptability and better sealing effect by cooperating with the existing tubular furnace structure through a sealing component, so as to solve the problem that the existing tubular furnace cannot be adjusted according to the different diameters of the furnace tubes, especially for the special-shaped furnace tube with a large diameter in the middle heating zone and small diameters at both ends, it is impossible to effectively adjust the seal of the two ends of the special-shaped furnace tube by only using a sealing module, thereby failing to achieve the sealing problem of the entire special-shaped furnace tube.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A zirconium corundum high-temperature resistant special furnace tube comprises a tubular furnace body, a furnace tube is clamped in the middle of the tubular furnace body, inner cavities at both ends of the furnace tube are fixedly connected with inner sealing rings, both ends of the furnace tube are fixedly connected with outer sealing rings, and soft pads are installed at the ends of the outer sealing rings; a sealing component, the sealing component is used to seal the furnace tubes of different diameters, and the sealing component is respectively connected to the inner sealing ring and the outer sealing ring.

[0008] The sealing assembly includes a U-shaped bent pad fixedly connected to the inner cavity of the inner sealing ring, a protruding block is fixedly connected to the middle of the outer wall of the U-shaped bent pad, a U-shaped frame is fixedly connected to the top of the inner cavity of the tubular furnace body, and a first weakening groove is opened on the U-shaped bent pad near the top of the protruding block.

[0009] A support column is fixedly connected to the surface of the U-shaped frame, a sealing block is clamped in the inner cavity of the U-shaped frame, and a surface of the sealing block is clamped in the surface of the support column.

[0010] The distance between the two U-shaped frames is matched with the size of the U-shaped bending pad.

[0011] The ends of the sealing block are slidably connected to the two ends of the U-shaped bending pad.

[0012] The bottom of the inner cavity of the inner sealing ring is fixedly connected with an arc-shaped pad, and the surface of the arc-shaped pad is fixedly connected with an arc-shaped air cushion.

[0013] A limiting groove is provided on one side of the outer sealing ring close to the U-shaped frame. The size of the limiting groove is larger than the size of the U-shaped frame and is used to adjust the movement trajectory of the U-shaped frame.

[0014] The U-shaped frame is made of plastic material, and second weakening grooves are symmetrically opened at the bottom end and the arc end.

[0015] The sealing block is made of rubber and has a size larger than that of the U-shaped frame.

[0016] The arc-shaped air cushions are symmetrically distributed at the upper and lower ends of the inner cavity of the tubular furnace body.

[0017] The beneficial effects of the utility model are:

[0018] (1) The utility model arranges a sealing component to place furnace tubes of different diameters in the middle of the tubular furnace body. The cylindrical shape of the middle of the furnace tube will fit with the sealing component. At this time, the sealing component is covered on the tubular furnace body, and the furnace tube is pressed by the sealing component on the upper part of the inner cavity of the tubular furnace body, so that the furnace tube sinks. The sealing component is gathered toward the middle when the furnace tube is pressed downward, thereby achieving a better sealing effect on the furnace tube, and further enabling special furnace tubes with different diameters to be adapted in the middle.

[0019] (2) The utility model provides a U-shaped bending pad, a protruding block, a U-shaped frame and a support column. When the cover of the tubular furnace body is pressed down, the U-shaped frame will enter the inner wall of the U-shaped bending pad and gradually slide down. When the ends of the U-shaped frame and the sealing block contact the protruding block, the two ends of the U-shaped bending pad will be retracted inward and abut against the outer wall of the support column. At this time, the sealing block can be better fitted to the outer wall of the furnace tube, thereby further enhancing the sealing effect of the furnace tube.

[0020] (3) The utility model provides an arc-shaped pad and an arc-shaped air cushion. Since the furnace tube has a certain weight, when the furnace tube is placed in the middle of the tubular furnace body, it will fit with the outer wall of the arc-shaped air cushion under the action of gravity. When pressed down, the symmetrical arc-shaped air cushion can balance the furnace tube, avoiding the misalignment of the small-diameter furnace tube at both ends of the large-diameter tubular furnace body, thereby ensuring the precise fit of the U-shaped frame and the support column to the furnace tube, thereby improving the sealing effect of the furnace tube.

[0021] In summary, the utility model has the advantages of strong adaptability, better sealing effect, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the cutaway three-dimensional structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the furnace tube and the inner sealing ring of the utility model;

[0025] Figure 4 For this utility model Figure 3 The enlarged structural diagram at A in the middle;

[0026] Figure 5 It is a schematic diagram of the structure of the sealing assembly, inner sealing ring and outer sealing ring of the utility model. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present utility model, 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" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0029] Embodiment 1

[0030] like Figures 1 to 5 As shown, the embodiment of the utility model provides a zirconium corundum high temperature resistant special furnace tube, including a tubular furnace body 1, a furnace tube 2 is clamped in the middle of the tubular furnace body 1, inner cavities at both ends of the furnace tube 2 are fixedly connected with inner sealing rings 3, outer sealing rings 4 are fixedly connected at both ends of the furnace tube 2, and soft pads are installed at the ends of the outer sealing ring 4; a sealing component, the sealing component is used to seal the furnace tubes 2 of different diameters, the sealing component is respectively connected to the inner sealing ring 3 and the outer sealing ring 4, the sealing component includes a U-shaped bending pad 5 fixedly connected to the inner cavity of the inner sealing ring 3, and the outer sealing ring 4 is fixedly connected to the inner cavity of the inner sealing ring 3. The length is slightly larger than the length of the inner sealing ring 3. Since there will be a heating area inside the tubular furnace body 1, the heating effect at both ends of the inner cavity of the tubular furnace body 1 is much lower than that in the middle heating area. Therefore, part of the sealing components are installed on the inner sealing ring 3. Its function is to improve the sealing effect of the tubular furnace body 1 on the small diameter end 2 of the special furnace tube through the inner and outer sealing ring 3 and the outer sealing ring 4. On the one hand, the special furnace tube 2 with different diameters can also be adapted to the tubular furnace body 1, which is convenient for the work to be carried out and improves the adaptability of the tubular furnace body 1.

[0031] Embodiment 2

[0032] like Figure 2 and Figure 3 As shown, the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that:

[0033] The sealing assembly includes a U-shaped bent pad 5 fixedly connected to the inner cavity of the inner sealing ring 3. The U-shaped bent pad 5 is arranged in the inner sealing ring 3, and can play an auxiliary fixing role for the furnace tube 2 from the inside. The U-shaped bent pad 5 is arranged in a U-shape, which is convenient for the placement of the furnace tube 2. At the same time, weakened grooves are arranged at both ends of the U-shape of the U-shaped bent pad 5. The weakened grooves are used to make the two ends move closer to the middle, thereby utilizing the secondary sealing of the small diameter end 2 of the special furnace tube.

[0034] Embodiment 3

[0035] like Figure 4 and Figure 5 As shown, the components identical or corresponding to those in the second embodiment are marked with the corresponding reference numerals in the second embodiment. For the sake of simplicity, only the differences from the second embodiment are described below. The difference between the third embodiment and the second embodiment is that:

[0036] The middle part of the outer wall of the U-shaped bending pad 5 is fixedly connected with a protruding block 501, the top of the inner cavity of the tubular furnace body 1 is fixedly connected with a U-shaped frame 502, the U-shaped bending pad 5 is provided with a first weakening groove near the top of the protruding block 501, the surface of the U-shaped frame 502 is fixedly connected with a support column 503, the inner cavity of the U-shaped frame 502 is clamped with a sealing block 504, the surface of the sealing block 504 is clamped on the surface of the support column 503, the bottom of the inner cavity of the inner sealing ring 3 is fixedly connected with an arc-shaped pad 505, the surface of the arc-shaped pad 505 is fixedly connected with an arc-shaped air cushion 506, the material of the U-shaped frame 502 is plastic, and there is no deformation. The initial state is consistent with the inner wall diameter size of the inner sealing ring 3. When the cover of the tubular furnace body 1 is pressed down, the second weakened groove at the arc-shaped end of the U-shaped frame 502 is used to make the U-shaped frame 502 slide toward the inner wall of the U-shaped bending pad 5, and after the bottom end of the U-shaped frame 502 contacts the outer wall of the furnace tube 2, the second weakened groove at the bottom end of the U-shaped frame 502 is used to wrap the bottom end of the U-shaped frame 502 with the furnace tube 2. At this time, there is a blockage by the inner wall of the U-shaped bending pad 5, and the U-shaped frame 502 and the support column 503 will move along the arc trajectory of the inner wall of the U-shaped bending pad 5, and the U-shaped frame 502 and the support column 503 are used to wrap the furnace tube 2 to improve the sealing effect.

[0037] As the U-shaped frame 502 and the support column 503 gradually slide down, they will contact the protruding block 501. The protruding block 501 cooperates with the first weakened groove above, so that the U-shaped end of the U-shaped bending pad 5 moves toward the middle and rests on the surface of the sealing block 504. This further enables the sealing block 504 to fit better on the outer wall of the furnace tube 2, further improving the sealing effect.

[0038] The interior of the arc-shaped air cushion 506 is a cavity. After the furnace tube 2 is placed, it will be deformed by the pressure, and in the process of the furnace tube 2 gradually sinking, it will continuously fit with the outer wall of the furnace tube 2 by using the interaction force. The symmetrical arc-shaped air cushion 506 can ensure that the furnace tube 2 is always in the middle position, thereby limiting the furnace tube 2 while also slowly fitting other components with the outer wall of the furnace tube 2 to achieve a sealing effect.

[0039] Working steps

[0040] Step 1: Open the cover of the tube furnace body 1, and place the heated part in the middle of the furnace tube 2 in the middle of the tube furnace body 1, and then put the processing material in from both ends of the furnace tube 2. After sealing, cover the cover of the tube furnace body 1.

[0041] Step 2: The furnace tube 2 is made of zirconium corundum, which has high strength, hardness and high temperature resistance. When the cover is closed, the bottom of the small diameter end of the furnace tube 2 is already in full contact with the U-shaped bending pad 5. Since the top of the U-shaped frame 502 is fixed to the top of the inner cavity of the tubular furnace body 1, it will drop synchronously with the cover of the tubular furnace body 1. When the diameters of the two ends of the furnace tube 2 are smaller than the inner diameter of the inner sealing ring 3, the U-shaped frame 502 will slide into the U-shaped end of the U-shaped bending pad 5 under the action of pressure, cooperate with the second weakened groove of the arc-shaped end of the U-shaped frame 502, and make use of the U-shaped end of the U-shaped bending pad 5 to continue to apply pressure to close the cover of the tubular furnace body 1. At this time, the U The frame 502 and the support column 503 continue to slide toward the middle of the U-shaped bending pad 5. When they contact the protruding block 501, the downward pressure of the U-shaped frame 502 and the support column 503 will cause the protruding block 501 to be squeezed downward. At this time, in conjunction with the first weakened groove, the U-shaped end of the U-shaped bending pad 5 is turned toward the middle and finally abuts against the outer wall of the sealing block 504. When the diameters of the two ends of the furnace tube are consistent with the diameter of the inner sealing ring 3, the ends of the U-shaped frame 502 and the support column 503 will abut against the U-shaped end of the U-shaped bending pad 5 and will not slide down, and the middle of the bottom end of the U-shaped frame 502 will continue to move downward until it fits with the outer wall diameter of the furnace tube 2.

[0042] Step 3: During the downward movement of the U-shaped frame 502 and the support column 503, the bottom end of the middle portion of the U-shaped frame 502 will contact the outer wall of the furnace tube 2, and the second weakened groove at the bottom end can be retracted toward the middle when it fits the outer wall of the furnace tube 2. At this time, the second weakened groove at the arc-shaped end will also retract toward the middle synchronously, so that the U-shaped frame 502 as a whole moves along the arc-shaped trajectory of the U-shaped bending pad 5.

[0043] Step 4: When the U-shaped frame 502 and the support column 503 are tightly fitted to the outer wall of the furnace tube 2, the bottom of the furnace tube 2 and the arc-shaped air cushion 506 are also tightly fitted, and when the furnace tube 2 is placed, the arc-shaped air cushion 506 starts to work. As the furnace tube 2 is continuously pressed and sinks, the arc-shaped air cushion 506 uses the interaction force to keep the furnace tube 2 in the middle position at all times.

[0044] Step 5. Finally, when the sealing assembly completely wraps the outer wall of the furnace tube 2, the cover of the tubular furnace body 1 is also completely sealed. The cushion at the end of the outer sealing ring 4 is relatively soft and will directly fit the outer diameter of the furnace tube 2, thereby effectively sealing the tubular furnace body 1 and the furnace tube 2 from the outside. Turn on the equipment switch for heat treatment.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A zirconium corundum high temperature resistant special furnace tube, comprising a tubular furnace body, characterized in that: A furnace tube is clamped in the middle of the tube furnace body, inner cavities at both ends of the furnace tube are fixedly connected with inner sealing rings, outer sealing rings are fixedly connected at both ends of the furnace tube, and cushions are installed at the ends of the outer sealing rings; A sealing assembly is used to seal the furnace tubes of different diameters, and the sealing assembly is connected to the inner sealing ring and the outer sealing ring respectively.

2. The zirconium corundum high temperature resistant special furnace tube according to claim 1, characterized in that: The sealing assembly includes a U-shaped bent pad fixedly connected to the inner cavity of the inner sealing ring, a protruding block is fixedly connected to the middle of the outer wall of the U-shaped bent pad, a U-shaped frame is fixedly connected to the top of the inner cavity of the tubular furnace body, and a first weakening groove is opened on the U-shaped bent pad near the top of the protruding block.

3. The zirconium corundum high temperature resistant special furnace tube according to claim 2, characterized in that: A support column is fixedly connected to the surface of the U-shaped frame, a sealing block is clamped in the inner cavity of the U-shaped frame, and a surface of the sealing block is clamped in the surface of the support column.

4. The zirconium corundum high temperature resistant special furnace tube according to claim 2, characterized in that: The distance between the two U-shaped frames is matched with the size of the U-shaped bending pad.

5. The zirconium corundum high temperature resistant special furnace tube according to claim 3, characterized in that: The ends of the sealing block are slidably connected to the two ends of the U-shaped bending pad.

6. The zirconium corundum high temperature resistant special furnace tube according to claim 1, characterized in that: The bottom of the inner cavity of the inner sealing ring is fixedly connected with an arc-shaped pad, and the surface of the arc-shaped pad is fixedly connected with an arc-shaped air cushion.

7. The zirconium corundum high temperature resistant special furnace tube according to claim 1, characterized in that: A limiting groove is provided on one side of the outer sealing ring close to the U-shaped frame. The size of the limiting groove is larger than the size of the U-shaped frame and is used to adjust the movement trajectory of the U-shaped frame.

8. The zirconium corundum high temperature resistant special furnace tube according to claim 2, characterized in that: The U-shaped frame is made of plastic material, and second weakening grooves are symmetrically opened at the bottom end and the arc end.

9. The zirconium corundum high temperature resistant special furnace tube according to claim 3, characterized in that: The sealing block is made of rubber and has a size larger than that of the U-shaped frame.

10. The zirconium corundum high temperature resistant special furnace tube according to claim 6, characterized in that: The arc-shaped air cushions are symmetrically distributed at the upper and lower ends of the inner cavity of the tubular furnace body.

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