Rotary tube furnace

Abstract

The utility model discloses a rotary tube furnace, which comprises a furnace body including an upper furnace body and a lower furnace body. The quartz tube is rotatably mounted between the upper furnace body and the lower furnace body, and a gear ring is fixedly mounted on the quartz tube. The transmission assembly comprises a motor, a driving wheel and a driven wheel assembly, the driving wheel is fixedly installed on a rotating shaft of the motor, the driven wheel assembly is rotatably installed on the lower furnace body and meshed with the gear ring, the motor is used for driving the driving wheel to rotate, and the driving wheel drives the driven wheel assembly to rotate through a synchronous belt and further drives the gear ring to rotate; and the quartz tube can rotate synchronously with the gear ring. According to the rotary tube furnace disclosed by the utility model, the quartz tube is used as the heating furnace body, so that the heat resistance is higher, and the conditions that materials are polluted and the furnace body is eroded are avoided. The synchronous belt and the synchronous wheel are used as primary transmission, and the gear is used as secondary transmission, so that the transmission is more stable, and the quartz glass tube body cannot be broken due to unstable transmission.

Description

Technical Field

[0001] The utility model belongs to the technical field of tube furnaces, and in particular relates to a rotary tube furnace. Background Art

[0002] The existing rotary tube furnace is costly, occupies a large area, has high requirements for plant environment and supporting facilities, and consumes a lot of manpower costs for operation and maintenance, which is not suitable for use by small and medium-sized enterprises. Traditional technology uses a large steel furnace body, which leads to extremely slow heating and cooling speed. It usually takes several days to heat from room temperature to working temperature and cool from working temperature to room temperature, which is not conducive to product process replacement and regular maintenance of equipment. The minimum amount of material required for a single job is too large to meet the needs of research and development, experiments, small batch trial production, process verification, etc. There is an upper limit to the heating temperature of the steel furnace body, which is powerless for product processing that requires 1000 degrees Celsius or above. In addition, the metal has a high thermal expansion coefficient and is greatly deformed by heat. After long-term use, it is easy to cause plastic deformation or even damage to the main structure of the equipment. The steel furnace body may react with some highly active materials, resulting in material contamination; similarly, the atmosphere required for some processes may react with the steel furnace body, resulting in material contamination and furnace body erosion. Meanwhile, the existing rotary tube furnace also has the problem that the transmission system is too large and the rotation process is unstable due to chain transmission.

[0003] Therefore, in view of the above technical problems, it is necessary to provide a rotary tube furnace which is miniaturized, has stable rotation, fast heating speed, and is not easy to contaminate materials and deform.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0005] The utility model aims to provide a rotary tube furnace, which can solve the problems of easy deformation and material pollution of the furnace body of the traditional rotary tube furnace and unstable rotation.

[0006] In order to achieve the above-mentioned purpose, a specific embodiment of the utility model provides a rotary tube furnace, comprising: a furnace body, including an upper furnace body and a lower furnace body; a quartz tube, the quartz tube is rotatably installed between the upper furnace body and the lower furnace body, and a gear ring is fixedly installed on the quartz tube; a transmission assembly, including a motor, a driving wheel and a driven wheel assembly, the driving wheel is fixedly installed on the motor shaft, the driven wheel assembly is rotatably installed on the lower furnace body, the driven wheel assembly is meshed with the gear ring, the motor is used to drive the driving wheel to rotate, the driving wheel drives the driven wheel assembly to rotate through a synchronous belt, and then drives the gear ring to rotate, and the quartz tube can rotate synchronously with the gear ring.

[0007] In one or more embodiments of the present invention, the driven wheel assembly includes a synchronous wheel and a gear, the synchronous wheel is coaxially fixedly installed with the gear, the driving wheel drives the synchronous wheel to rotate through a synchronous belt and then drives the gear to rotate, and the gear can drive the gear ring to rotate.

[0008] In one or more embodiments of the present invention, the gear is meshed with a gear ring.

[0009] In one or more embodiments of the present invention, the driven wheel assemblies are arranged in plurality around the gear ring, and the transmission assembly also includes an idler wheel, which is rotatably mounted on the lower furnace body and is used to change the transmission direction of the synchronous belt located between the driven wheel assemblies.

[0010] In one or more embodiments of the present invention, a first mounting ring is fixedly mounted on one side of the gear ring, a first limiting groove wheel is mounted on the driven wheel assembly, an outer peripheral edge of the first mounting ring is embedded in the annular groove of the first limiting groove wheel, and the annular groove of the first limiting groove wheel is used to limit the axial movement of the first mounting ring.

[0011] In one or more embodiments of the present invention, one or more supporting wheels are installed on the lower furnace body, and the supporting wheels are used to support the quartz tube.

[0012] In one or more embodiments of the utility model, a second mounting ring is fixedly mounted on the quartz tube, and a second limiting groove wheel is correspondingly mounted on the lower furnace body, and the outer peripheral edge of the second mounting ring is embedded in the annular groove of the second limiting groove wheel, and the annular groove of the second limiting groove wheel is used to limit the axial movement of the second mounting ring.

[0013] In one or more embodiments of the present invention, gas supply components and sealing components are provided at both ends of the quartz tube, and a gas path support for supporting the gas supply component is installed on the lower furnace body.

[0014] In one or more embodiments of the present invention, the upper furnace body and / or the lower furnace body is divided into a plurality of heating zones along the axial direction of the furnace body.

[0015] In one or more embodiments of the present invention, the tubular furnace further comprises a base, and the lower furnace body is mounted on the base via an electric push rod and a hinge, and the electric push rod is used to support the lower furnace body to rotate around the hinge.

[0016] Compared with the prior art, the rotary tube furnace of the utility model adopts a quartz tube as the heating furnace body, with fast heating and cooling speed, higher heat resistance, and can reach up to 1300 degrees Celsius; the thermal conductivity and thermal expansion coefficient are both lower, which effectively avoids the increase of the ambient temperature around the furnace body and the high-temperature deformation of the furnace body, prolongs the service life, and improves the working environment. And quartz glass, as a non-metallic inert material, does not react with most materials and atmosphere environments, and will not pollute materials and corrode the furnace body. In the transmission control of the quartz tube, by using synchronous belts and synchronous wheels as the primary transmission and gears as the secondary transmission, the transmission is more stable, and the quartz glass tube body will not be broken due to unstable transmission. In addition, by dividing the furnace body into multiple heating areas and setting independent heating, temperature measurement and control modules for each, multiple independent temperature zones that can control the temperature and heating time can be formed in the furnace during operation, which greatly enriches the available production process of the rotary tube furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of a rotary tube furnace in one embodiment of the utility model.

[0019] Figure 2 This is another structural schematic diagram of a rotary tube furnace in one embodiment of the utility model.

[0020] Figure 3 It is a structural schematic diagram of a transmission assembly in one embodiment of the utility model.

[0021] Figure 4 It is another structural schematic diagram of the transmission assembly in one embodiment of the utility model.

[0022] Figure 5 It is a structural schematic diagram of a transmission bracket in one embodiment of the utility model.

[0023] Figure 6 It is a structural schematic diagram of the first adjustment component in one embodiment of the utility model.

[0024] Figure 7 It is another structural schematic diagram of the first adjustment component in one embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] In addition, in the present utility model, words such as "first" and "second" are mainly used to distinguish one technical feature from another technical feature, and do not necessarily require or imply that there is a certain actual relationship, quantity or order between these technical features.

[0027] like Figures 1 to 4 As shown, a rotary tube furnace in an embodiment of the present invention includes a furnace body 10 , a quartz tube 20 , a transmission assembly and a base 40 .

[0028] The furnace body 10 includes an upper furnace body 11 and a lower furnace body 12. A quartz tube 20 is rotatably installed between the upper furnace body 11 and the lower furnace body 12, and a gear ring 21 is fixedly installed on the quartz tube 20. A transmission bracket 30 for installing a transmission assembly is provided on one side of the lower furnace body 12.

[0029] The transmission assembly includes a motor 31, a driving wheel 32 and a driven wheel assembly 33. The motor 31 is fixedly mounted on the transmission bracket 30. The driving wheel 32 is fixedly mounted on the rotating shaft of the motor 31. The driven wheel assembly 33 is rotatably mounted on the transmission bracket 30. The driven wheel assembly 33 is meshed with the gear ring 21. The motor 31 is used to drive the driving wheel 32 to rotate. The driving wheel 32 drives the driven wheel assembly 33 to rotate through the synchronous belt 34, and then drives the gear ring 21 to rotate. The quartz tube 20 can rotate synchronously with the gear ring 21.

[0030] Compared with the prior art, the rotary tubular furnace of the utility model adopts a quartz tube 20 as the heating furnace body, which has a fast heating and cooling speed, and the quartz glass has high heat resistance, which can reach up to 1300 degrees Celsius. The upper limit of the working temperature is nearly 1 times higher than that of the traditional steel furnace body. The thermal conductivity of quartz glass is low, and the heat in the furnace during operation will not be conducted axially outward through the furnace body, which significantly improves the working environment of the operator. The thermal expansion coefficient of quartz glass is low, and the deformation caused by heat under high-temperature working conditions is small, and it has a longer life under normal use. And as a non-metallic inert material, quartz glass does not react with most materials and atmosphere environments, and there will be no contamination of materials and erosion of the furnace body.

[0031] Preferably, the motor 31 adopts a brushless DC motor to replace the traditional ordinary reduction motor, so that the rotation speed can be adjusted, and the available production processes of the rotary tube furnace are further enriched.

[0032] like Figure 3 and Figure 4 As shown, the driven wheel assembly 33 includes a synchronous wheel 331, a gear 332 and a first connecting shaft 333. The synchronous wheel 331 and the gear 332 are fixedly installed. The synchronous wheel 331 and the gear 332 are rotatably installed on the first connecting shaft 333, and the first connecting shaft 333 is installed on the transmission bracket 30. The driving wheel 32 drives the synchronous wheel 331 to rotate through the synchronous belt 34 and then drives the gear 332 to rotate. The gear 332 is meshed with the gear ring 21 so that the gear 332 can drive the gear ring 21 to rotate.

[0033] In the transmission system, by using the synchronous wheel 331 and the synchronous belt 34 as the primary transmission and the gear ring 21 and the gear 332 as the secondary transmission, it is more stable than the sprocket chain transmission used in large rotary furnaces and will not cause the quartz glass tube to break due to unstable transmission.

[0034] like Figure 4 As shown, two driven wheel assemblies 33 are symmetrically arranged, and a synchronous belt 34 is wound between the two gears 332 and the driving wheel 32. The two gears 332 can drive the gear ring 21 to rotate at the same time.

[0035] like Figure 4 As shown, a first mounting ring 22 is fixedly mounted on one side of the gear ring 21, and a first limiting groove wheel 334 is fixedly mounted on one side of each gear 332. The first limiting groove wheel 334 and the synchronous wheel 331 are located on both sides of the gear 332. The outer peripheral edge of the first mounting ring 22 is embedded in the annular groove of the first limiting groove wheel 334. The annular groove of the first limiting groove wheel 334 is used to limit the axial movement of the first mounting ring 22, thereby limiting the axial movement of the quartz tube 20.

[0036] By assembling the synchronous wheel 331, the gear 332 and the first limit groove wheel 334 coaxially, the common parts are integrated to realize the functions of secondary transmission and limit, which greatly reduces the complexity of the structure and the space occupied, making the device more compact and easy to install, which conforms to the design concept of miniaturization. In other embodiments, the annular groove can also be constructed by grooving the gear 332.

[0037] like Figure 4 , Figure 5 and Figure 7As shown, in one embodiment, one end of each first connecting shaft 333 is installed on the transmission bracket 30 through the corresponding first strip hole 351 opened on the transmission bracket 30. Specifically, a threaded hole is opened at one end of the first connecting shaft 333, and the threaded column of the bolt 335 is screwed into the threaded hole by passing through the first strip hole 351 from the other side of the first strip hole 351. Since the shaft diameter of the first connecting shaft 333 is larger than the width of the first strip hole 351 and the head of the bolt 335 is larger than the width of the first strip hole 351, when the threaded column of the bolt 335 is screwed into the threaded hole, it can be installed on the transmission bracket 30 by clamping through the cooperation of the head of the bolt 335 and the first connecting shaft 333. In other embodiments, the first connecting shaft 333 and the bolt 335 can have different fixed connection methods, and the first connecting shaft 333 can also be installed on the transmission bracket 30 through the first strip hole 351 in other ways, and it is only necessary to meet the requirement that the first connecting shaft 333 can move along the first strip hole 351.

[0038] like Figure 5 As shown, in one embodiment, two first strip holes 351 are symmetrically opened in an "eight" shape on the transmission bracket 30, that is, each first strip hole 351 extends toward the gear ring 21. In other embodiments, the direction of the first strip holes 351 is determined by the direction in which the driven wheel assembly 33 actually needs to be adjusted, and can be adjusted according to the specific location and number of the driven wheel assembly 33.

[0039] like Figure 4 , Figure 6 and Figure 7 As shown, the transmission bracket 30 is also provided with a first adjusting component 36 for pushing the first connecting shaft 333 to move along the first bar-shaped hole 351 . The first adjusting assembly 36 includes a mounting frame 381 and an adjusting member 362. The mounting frame 361 is located between the synchronous wheel 331 and the transmission bracket 30. The mounting frame 361 is fixedly installed on the transmission bracket 30. A second strip hole 363 corresponding to the first strip hole 351 is opened on the mounting frame 361. The first connecting shaft 333 passes through the second strip hole 363 on the mounting frame 361 and then passes through the first strip hole 351 to be installed with the bolt 335. An internal threaded hole is provided on one side of the mounting frame 361. The adjusting member 362 is provided with an external thread. The adjusting member 362 is threadedly matched with the internal threaded hole and by screwing the adjusting member 362, one end of the adjusting member 362 can pass through the internal threaded hole and extend into the mounting frame 361 to abut against the side wall of the first connecting shaft 333, so that the first connecting shaft 333 can be pushed to move along the length direction of the first strip hole 351 and the second strip hole 363 by continuing to screw the adjusting member 362.

[0040] like Figure 7As shown, the first connecting shaft 333 is also provided with an abutting surface that abuts against the adjusting member 362. The setting of the abutting surface enables the adjusting member 362 to stably provide thrust to the first connecting shaft 333, ensuring that the first connecting shaft 333 moves in a specified direction without the first connecting shaft 333 itself rotating.

[0041] By setting the first adjustment component 36, the position of the driven wheel component 33 can be adjusted, and space is reserved for the installation and matching of the driven wheel component 33 with the quartz tube 20, the gear ring 21 and the first mounting ring 22. It can adapt to the size differences of different quartz tubes 20 and gear rings 21, adjust the height of the quartz tube 20 and the tightness of the meshing between the gear 332 and the gear ring 21, and also leave space for the thermal expansion of the quartz tube 20.

[0042] like Figure 3 and Figure 4 As shown, the transmission assembly 30 also includes an idler wheel 371 rotatably mounted on the transmission bracket 30, and the idler wheel 371 is located below between the two driven wheel assemblies 33 and above the driving wheel 32. The idler wheel 371 is rotatably mounted on the second connecting shaft 372, and the second connecting shaft 372 is mounted on the transmission bracket 30 in the same manner as the first connecting shaft 333 is mounted on the transmission bracket 30.

[0043] like Figure 4 and Figure 5 As shown, one end of the second connecting shaft 372 is installed on the transmission bracket 30 through a third strip hole 352 opened on the transmission bracket 30. Specifically, a threaded hole is opened at one end of the second connecting shaft 372, and the threaded column of the bolt is passed through the third strip hole 352 from the other side of the third strip hole 352 and screwed into the threaded hole. Since the shaft diameter of the second connecting shaft 372 is larger than the width of the third strip hole 352 and the head of the bolt is larger than the width of the third strip hole 352, when the threaded column of the bolt is screwed into the threaded hole, it can be installed on the transmission bracket 30 by clamping through the cooperation of the head of the bolt and the second connecting shaft 372.

[0044] In one embodiment, the third strip hole 352 is vertically opened on the transmission bracket 30. In other embodiments, the direction of the third strip hole 352 can be adjusted according to the specific location and number of the synchronous belt 34 and the idler wheel 371.

[0045] The transmission bracket 30 is also provided with a second adjustment component 38 for pushing the second connecting shaft 372 to move along the third strip hole 352. The second adjustment component 38 has the same structure as the first adjustment component 36, but the direction of the force applied is different. The second adjustment component 38 can be used to adjust the second connecting shaft 372 downward in the vertical direction.

[0046] The idler wheel 371 is wound with a synchronous belt 34 at the bottom thereof. The idler wheel 371 can change the transmission direction of the synchronous belt 34 between the driven wheel assembly 33, increase the contact area between the synchronous belt 34 and the synchronous wheel 331, and enable the synchronous belt 34 to drive the synchronous wheel 331 to rotate to the greatest extent. The idler wheel 371 is moved downward by the second adjustment assembly 38 to tighten the synchronous belt 34, and increase the friction between the synchronous belt 34 and the synchronous wheel 331 and the driving wheel 32.

[0047] In other embodiments, one or more driven wheel assemblies 33 may be provided, and the number of idler wheels 371 should be adjusted accordingly.

[0048] like Figure 3 As shown, a supporting wheel 39 is rotatably mounted on the transmission bracket 30. The supporting wheel 39 is arranged at the bottom of the quartz tube 20 to support the quartz tube 20 and ensure that the quartz tube 20 remains stable during the rotation process. The supporting wheel 39 is in direct contact with the quartz tube 20 and can rotate synchronously with the quartz tube 20 through friction while the quartz tube 20 rotates, which can provide uniform support force to the bottom of the quartz tube 20 and will not hinder the rotation of the quartz tube 20. The supporting wheel 39 is rotatably mounted on the third connecting shaft. The transmission bracket 30 is also provided with a fourth strip hole. The third connecting shaft is mounted on the transmission bracket 30 through the fourth strip hole in the same way as the first connecting shaft 333 is mounted on the transmission bracket 30 through the first strip hole 351.

[0049] In one embodiment, three support wheels 39 are symmetrically arranged around the bottom of the quartz tube 20 , two fourth strip holes located on both sides are symmetrically opened in an "eight" shape on the transmission bracket 30 , and the middle fourth strip hole is vertically opened on the transmission bracket 30 .

[0050] The transmission bracket 30 is also provided with a third adjustment component for pushing the third connecting shaft to move along the fourth strip hole. The third adjustment component has the same structure as the first adjustment component 36, but the direction of the force applied is different. The third connecting shaft can be moved and adjusted along the fourth strip hole toward the quartz tube 20 through the third adjustment component.

[0051] like Figure 1 and Figure 2 As shown, a second mounting ring 23 is fixedly mounted on the other end of the quartz tube 20 away from the transmission assembly, and a limiting bracket 50 is correspondingly mounted on the lower furnace body 12. A second limiting groove wheel (not shown) is rotatably mounted on the limiting bracket 50, and the outer peripheral edge of the second mounting ring 23 is embedded in the annular groove of the second limiting groove wheel. The annular groove of the second limiting groove wheel is used to limit the axial movement of the second mounting ring 23, thereby further limiting the axial movement of the quartz tube 20.

[0052] The upper furnace body 11 and the lower furnace body 12 are divided into multiple heating zones along the axial direction of the furnace body. Each heating zone has an independent heating resistance wire, temperature measuring thermocouple and control module. When working, three independent temperature zones that can control the temperature and heating time can be formed in the furnace, which greatly enriches the available production processes of the rotary tube furnace.

[0053] The lower furnace body 12 is mounted on the base 40 through an electric push rod 121 and a hinge 122. The electric push rod 121 is used to support the lower furnace body 12 to rotate around the hinge 122. The entire rotary tube furnace, except the base 40, can be tilted by the electric push rod 121 to facilitate the removal of materials from the furnace after processing. The preferred tilt angle is 0° to 15°.

[0054] A gas supply assembly 60 and a sealing assembly are provided at both ends of the quartz tube 20. The gas supply assembly 60 can provide protective gas or create a vacuum heating environment for the quartz tube 20, and the sealing assembly can ensure the airtightness of the quartz tube 20. A gas path support 61 for supporting the gas supply assembly 60 is also installed on the lower furnace body 12 to prevent the gas supply assembly 60 from shaking when the quartz tube 20 rotates.

[0055] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0056] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A rotary tube furnace, characterized in that: include: A furnace body, comprising an upper furnace body and a lower furnace body; A quartz tube, the quartz tube is rotatably installed between the upper furnace body and the lower furnace body, and a gear ring is fixedly installed on the quartz tube; The transmission assembly includes a motor, a driving wheel and a driven wheel assembly. The driving wheel is fixedly mounted on the motor shaft, and the driven wheel assembly is rotatably mounted on the lower furnace body. The driven wheel assembly is meshed with the gear ring. The motor is used to drive the driving wheel to rotate. The driving wheel drives the driven wheel assembly to rotate through a synchronous belt, and then drives the gear ring to rotate. The quartz tube can rotate synchronously with the gear ring.

2. The rotary tube furnace according to claim 1, characterized in that: The driven wheel assembly includes a synchronous wheel and a gear. The synchronous wheel is fixedly installed coaxially with the gear. The driving wheel drives the synchronous wheel to rotate through a synchronous belt and then drives the gear to rotate. The gear can drive the gear ring to rotate.

3. The rotary tube furnace according to claim 2, characterized in that: The gear meshes with the gear ring.

4. The rotary tube furnace according to claim 1, characterized in that: The driven wheel assemblies are arranged in plurality around the gear ring, and the transmission assembly further comprises an idler wheel which is rotatably mounted on the lower furnace body and is used to change the transmission direction of the synchronous belt between the driven wheel assemblies.

5. The rotary tube furnace according to claim 1, characterized in that: A first mounting ring is fixedly mounted on one side of the gear ring, a first limiting groove wheel is mounted on the driven wheel assembly, an outer peripheral edge of the first mounting ring is embedded in the annular groove of the first limiting groove wheel, and the annular groove of the first limiting groove wheel is used to limit the axial movement of the first mounting ring.

6. The rotary tube furnace according to claim 1, characterized in that: One or more supporting wheels are installed on the lower furnace body, and the supporting wheels are used to support the quartz tube.

7. The rotary tube furnace according to claim 1, characterized in that: A second mounting ring is fixedly mounted on the quartz tube, and a second limiting groove wheel is correspondingly mounted on the lower furnace body. The outer periphery of the second mounting ring is embedded in the annular groove of the second limiting groove wheel, and the annular groove of the second limiting groove wheel is used to limit the axial movement of the second mounting ring.

8. The rotary tube furnace according to claim 1, characterized in that: Both ends of the quartz tube are provided with a gas supply assembly and a sealing assembly, and a gas path support for supporting the gas supply assembly is installed on the lower furnace body.

9. The rotary tube furnace according to claim 1, characterized in that: The upper furnace body and / or the lower furnace body is divided into a plurality of heating zones along the axial direction of the furnace body.

10. The rotary tube furnace according to claim 1, characterized in that: The tubular furnace also includes a base, and the lower furnace body is installed on the base through an electric push rod and a hinge, and the electric push rod is used to support the lower furnace body to rotate around the hinge.

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