Vacuum carburizing furnace with high efficiency heat preservation function

Abstract

The utility model discloses a vacuum carburizing furnace with efficient heat preservation function relates to metal workpiece processing technical field, including vacuum carburizing furnace body, the front side of vacuum carburizing furnace body is equipped with the furnace door through the hinge rotation installation, the rear side fixed mounting of vacuum carburizing furnace body has the fixed ring, the inner wall of vacuum carburizing furnace body is annular and has a plurality of groups of the nozzle for the carbonizing agent of import with a certain distance, the inner wall of vacuum carburizing furnace body is annular and is provided with a plurality of groups of fixed strip with a certain distance, the inboard fixed mounting of fixed strip has heating part.

Description

Technical Field

[0001] This utility model relates to the field of metal workpiece processing technology, specifically a vacuum carburizing furnace with high-efficiency heat preservation function. Background Technology

[0002] In the field of metal heat treatment, vacuum carburizing furnaces are widely used in the production and processing of key components such as gears, bearings, and shafts due to their advantages such as effectively preventing workpiece oxidation and producing excellent carburized layer quality. Their core working logic is to heat the workpiece in a vacuum environment and introduce a carburizing agent, allowing carbon elements to penetrate into the workpiece surface, thereby improving the workpiece's hardness, wear resistance, and fatigue strength, meeting the high-performance requirements of industrial equipment for components. However, the existing insulation structure design of vacuum carburizing furnaces has defects. Traditional equipment mostly uses fixed insulation layers, which cannot be adaptively adjusted according to changes in furnace temperature, workpiece specifications, and heat treatment process stages. When rapid heating or cooling is required, the fixed insulation layer will hinder heat conduction and prolong the process cycle. During the insulation stage, it is difficult to ensure a sealing effect, which easily leads to heat leakage. This not only causes uneven temperature distribution in the furnace, resulting in inconsistent carburized layer thickness and performance fluctuations in the workpiece, but also causes a lot of energy waste and increases production energy consumption costs. Secondly, the surface of the insulation board is prone to adhering to carburizing agent residue, dust, and other impurities. Long-term accumulation will reduce its insulation performance and flexibility, shortening its service life. Utility Model Content

[0003] To address the problems mentioned in the background art, the purpose of this utility model is to provide a vacuum carburizing furnace with high-efficiency heat preservation function. It has the advantages of adjustable heat preservation structure, good heat preservation effect and self-cleaning function of heat preservation board, and solves the problems of existing equipment where the heat preservation structure cannot be flexibly adjusted, heat is easily leaked, and heat preservation board is easily impurities, resulting in decreased heat preservation performance and shortened service life.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a vacuum carburizing furnace with high-efficiency heat preservation function, comprising a vacuum carburizing furnace body, a furnace door rotatably mounted on the front side of the vacuum carburizing furnace body via a hinge, a fixing ring fixedly mounted on the rear side of the vacuum carburizing furnace body, several sets of nozzles for introducing carburizing agent distributed in a ring at equal intervals on the inner wall of the vacuum carburizing furnace body, several sets of fixing strips arranged in a ring at equal intervals on the inner wall of the vacuum carburizing furnace body, and a heating element fixedly mounted on the inner side of the fixing strips. Support legs are fixedly installed at the four corners of the bottom of the body. A rotating tank is rotatably installed on the rear side of the fixed ring. The rotating tank consists of an outer sleeve and an inner sleeve. Several sets of heat insulation plates are arranged in a ring at equal intervals between the outer sleeve and the inner sleeve of the rotating tank. A heat insulation plate is fixedly installed on the inner wall of the inner sleeve of the rotating tank near the vacuum carburizing furnace body to prevent high temperature loss. It also includes a telescopic drive mechanism, a rotating mechanism, a synchronous linkage mechanism, and a rotating support assembly. The telescopic drive mechanism is located at the top of the fixed ring and is used to drive the heat insulation plates to telescopically move. The synchronous linkage mechanism is located at the top of the rotating tank and is used to transmit the power of the telescopic drive mechanism to the rotating mechanism. The rotating mechanism is located on the top of the rotating tank and is used to drive the rotating tank to rotate in conjunction with the synchronous linkage mechanism. The rotating support assembly is located at the bottom of the rotating tank and is used to provide stable support for the rotation of the rotating tank.

[0005] In a preferred embodiment of this utility model, the telescopic drive mechanism includes a base, a stepper motor, a first drive gear, a second drive gear, a gear plate, a telescopic ring, a first fixed shaft, a first shaft bracket, and a first rotating shaft. The base is fixedly installed on the top of the fixed ring, the stepper motor is fixedly installed on the top of the base, the first rotating shaft is fixedly connected to the output end of the stepper motor, the first drive gear is fixedly installed on the surface of the first rotating shaft, and the first shaft brackets located on both sides of the first drive gear are rotatably installed on the surface of the first rotating shaft. The bottom of the first shaft bracket is fixedly installed to the top of the fixed ring, and both ends of the first fixed shaft are fixedly installed to the inner side of the first shaft bracket. The second drive gear is rotatably installed on the surface of the first fixed shaft, and the first drive gear meshes with the second drive gear. The telescopic ring is slidably installed between the outer sleeve and the inner sleeve of the rotating tank. The bottom of the rear side of the gear plate is fixedly installed to the top of the telescopic ring, the second drive gear meshes with the gear plate, and the outer side of the insulation plate is fixedly installed to the inner side of the telescopic ring.

[0006] As a preferred embodiment of this utility model, slide bars are fixedly installed on both sides of the toothed plate, and a sliding groove is provided on the outer side of a set of fixed bars located at the top inside the vacuum carburizing furnace body to slide with the slide bars.

[0007] As a preferred embodiment of this utility model, the synchronous linkage mechanism includes a first bevel gear, a second fixed shaft, a second shaft bracket, a first linkage gear, and a second linkage gear. The first bevel gear is fixedly installed at the end of the first rotating shaft away from the stepper motor. Two sets of second shaft brackets are provided, with the bottom of the two sets of second shaft brackets fixedly installed to the top of the fixed ring. The two ends of the second fixed shaft are rotatably installed with the two sets of second shaft brackets respectively. A second bevel gear is fixedly installed at the end of the second fixed shaft near the first rotating shaft, and the second bevel gear meshes with the first bevel gear. The first linkage gear is fixedly installed on the surface of the second fixed shaft and located inside the two sets of second shaft brackets. The second linkage gear is located to the right of the first linkage gear and meshes with the first linkage gear.

[0008] In a preferred embodiment of this invention, the rotating mechanism includes a second rotating shaft, a third shaft bracket, a third linkage gear, and a gear ring. The bottom of the third shaft bracket near the stepper motor is fixedly installed with the top of the fixed ring. The bottom of the third shaft bracket away from the stepper motor is rotatably engaged with the top of the rotating tank. Both ends of the second rotating shaft are rotatably installed with the third shaft bracket. The second linkage gear is fixedly installed on the surface of the second rotating shaft near the stepper motor. The third linkage gear is fixedly installed at the end of the second rotating shaft away from the fixed ring. The gear ring is fixedly installed on the side of the outer sleeve of the rotating tank away from the fixed ring. The gear ring meshes with the third linkage gear.

[0009] As a preferred embodiment of this utility model, the rotating support assembly includes a support frame and a support wheel. A fixed plate is provided at the bottom of the rotating tank. The fixed plate is fixedly installed on the ground and is flush with the bottom of the support leg of the vacuum carburizing furnace body. Four sets of support frames are provided. The four sets of support frames are respectively fixedly installed at the four corners of the top of the fixed plate. The support wheel is rotatably installed with the support frame through axle pins. The surface of the support wheel is in contact with the outer side of the rotating tank.

[0010] As a preferred embodiment of this invention, a number of cleaning steel brushes arranged in a ring at equal intervals are fixedly installed on the outer surface of the inner sleeve of the rotating tank, and are used to clean the surface of the insulation board.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model solves the problems of existing equipment's inflexible insulation structure, easy heat leakage, and easy accumulation of dirt on the insulation board, which lead to decreased insulation performance and shortened service life. It is achieved by setting up a vacuum carburizing furnace body, furnace door, fixing ring, nozzle, fixing strip, heating element, support leg, rotating tank, insulation board, heat insulation board, telescopic drive mechanism, rotating mechanism, synchronous linkage mechanism and rotating support assembly.

[0012] 2. This utility model achieves adaptive expansion and contraction adjustment of the insulation board by setting a telescopic drive mechanism. The expansion and contraction of the insulation board can be flexibly controlled according to the temperature changes in the furnace and the requirements of the heat treatment process. When it expands, it forms a ring-shaped closed heat insulation ring to enhance the sealing and heat preservation effect and reduce heat loss. When it contracts, it reduces the heat preservation obstruction and facilitates rapid temperature adjustment, effectively balancing the heat preservation performance and heat treatment efficiency.

[0013] 3. By setting up a synchronous linkage mechanism, this utility model realizes the efficient transmission of power from the telescopic drive mechanism to the rotating mechanism, eliminating the need for an additional rotating drive power source, simplifying the equipment structure, reducing equipment manufacturing costs and energy consumption, and simultaneously achieving synchronous and coordinated operation of heat preservation adjustment and workpiece rotation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This utility model Figure 1 A structural diagram from another perspective; Figure 3 This is a schematic diagram of the internal structure of the vacuum carburizing furnace body and the rotary tank of this utility model; Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0015] In the diagram: 1. Vacuum carburizing furnace body; 101. Furnace door; 11. Fixing ring; 12. Support leg; 13. Nozzle; 14. Fixing strip; 141. Slide groove; 15. Heating element; 2. Rotary tank; 21. Cleaning steel brush; 22. Insulation plate; 3. Fixing plate; 31. Support frame; 32. Support wheel; 4. Insulation plate; 5. Base; 51. Stepper motor; 52. Drive gear one; 53. Drive gear two; 54. Gear plate; 541. Slide bar; 542. Telescopic ring; 55. Fixing shaft one; 551. Shaft bracket one; 6. Bevel gear one; 61. Rotating shaft one; 62. Fixing shaft two; 621. Shaft bracket two; 63. Bevel gear two; 64. Linkage gear one; 65. Linkage gear two; 7. Rotating shaft two; 701. Shaft bracket three; 71. Linkage gear three; 72. Gear ring. Detailed Implementation

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0019] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0020] Example 1 Reference Figure 1-4 This is the first embodiment of the present invention, employing the following technical solution: a vacuum carburizing furnace body 1; a furnace door 101 is rotatably mounted on the front side of the vacuum carburizing furnace body 1 via a hinge; a fixing ring 11 is fixedly mounted on the rear side of the vacuum carburizing furnace body 1; several sets of nozzles 13 for introducing carburizing agent are distributed in a ring at equal intervals on the inner wall of the vacuum carburizing furnace body 1; several sets of fixing strips 14 are arranged in a ring at equal intervals on the inner wall of the vacuum carburizing furnace body 1; heating elements 15 are fixedly mounted on the inner side of the fixing strips 14; and the bottom four corners of the vacuum carburizing furnace body 1 are fixed... The rotating tank 2 is rotatably mounted on the rear side of the fixed ring 11 and is composed of an outer sleeve and an inner sleeve. Several sets of heat insulation plates 4 are arranged in a ring at equal intervals between the outer sleeve and the inner sleeve of the rotating tank 2. A heat insulation plate 22 is fixedly installed on the inner wall of the inner sleeve of the rotating tank 2 near the vacuum carburizing furnace body 1 to prevent high temperature loss. It also includes a telescopic drive mechanism, a rotating mechanism, a synchronous linkage mechanism and a rotating support assembly. The telescopic drive mechanism is located on the top of the fixed ring 11 and is used to drive the heat insulation plates 4 to telescopically move. A synchronous linkage mechanism is set on the top of the rotating tank 2 and is used to transmit the power of the telescopic drive mechanism to the rotating mechanism. A rotating mechanism is installed on the top of the rotating tank 2 and is used to drive the rotating tank 2 to rotate in conjunction with the synchronous linkage mechanism. A rotating support assembly is located at the bottom of the rotating tank 2 and is used to provide stable support for the rotation of the rotating tank 2.

[0021] Specifically, the workpiece to be processed is placed into the vacuum carburizing furnace body 1 through the furnace door 101 on the front side of the vacuum carburizing furnace body 1. The furnace door 101 is closed and the inside of the vacuum carburizing furnace body 1 is evacuated. Then, the internal environment of the vacuum carburizing furnace body 1 is heated by the heating element 15. The carburizing agent is evenly introduced through the nozzle 13 on the inner wall of the vacuum carburizing furnace body 1. With the rotation action, the workpiece is fully contacted with the carburizing agent to achieve a uniform carburizing effect. The insulation plate 22 of the inner sleeve of the rotating tank 2, together with the telescopic insulation plate 4, enhances the insulation effect. The support leg 12 provides bottom support for the entire device. By starting the telescopic drive mechanism, several sets of insulation plates 4 between the outer sleeve and the inner sleeve of the rotating tank 2 can be driven to telescopically move. The synchronous linkage mechanism can transmit the power of the telescopic drive mechanism to the rotating mechanism. The rotating mechanism can drive the rotating tank 2 to rotate under the action of power. The rotating support assembly at the bottom of the rotating tank 2 provides stable support for its rotation process and avoids shaking.

[0022] Example 2 The second embodiment of this utility model adopts the following technical solution: the telescopic drive mechanism includes a base 5, a stepper motor 51, a first drive gear 52, a second drive gear 53, a gear plate 54, a telescopic ring 542, a first fixed shaft 55, a first shaft bracket 551, and a first rotating shaft 61. The base 5 is fixedly installed on the top of the fixed ring 11, the stepper motor 51 is fixedly installed on the top of the base 5, the first rotating shaft 61 is fixedly connected to the output end of the stepper motor 51, the first drive gear 52 is fixedly installed on the surface of the first rotating shaft 61, and the first shaft bracket 551 located on both sides of the first drive gear 52 is rotatably installed on the surface of the first rotating shaft 61. The bottom of the first shaft bracket 551 is fixedly connected to the top of the fixed ring 11. Fixed installation: the two ends of fixed shaft 55 are fixedly installed to the inner side of shaft bracket 551. Drive gear 2 53 is rotatably installed on the surface of fixed shaft 55. Drive gear 1 52 meshes with drive gear 2 53. Telescopic ring 542 is slidably installed between outer sleeve and inner sleeve of rotating tank 2. The bottom of rear side of toothed plate 54 is fixedly installed on top of telescopic ring 542. Drive gear 2 53 meshes with toothed plate 54. The outer side of insulation plate 4 is fixedly installed to the inner side of telescopic ring 542. Sliding strips 541 are fixedly installed on both sides of toothed plate 54. A set of fixed strips 14 located at the top of the interior of vacuum carburizing furnace body 1 has a sliding groove 141 on the outer side that slides with the sliding strip 541.

[0023] Specifically, base 5 provides a mounting foundation for stepper motor 51. When the temperature inside the vacuum carburizing furnace body 1 reaches the set value and needs to be maintained, stepper motor 51 starts, and its output end drives rotating shaft 61 to rotate synchronously. Shaft bracket 551 provides rotational support for rotating shaft 61, ensuring its rotational stability. When rotating shaft 61 rotates, drive gear 52 on the surface of rotating shaft 61 rotates synchronously. Since drive gear 52 meshes with drive gear 53 on the surface of fixed shaft 55, and both ends of fixed shaft 55 are fixed to the inner side of shaft bracket 551, drive gear 52 can drive drive gear 53 to rotate around fixed shaft 55. When drive gear 53 rotates, through meshing, it can drive toothed plate 54 towards the vacuum. As the carburizing furnace body 1 moves inward, the sliding strips 541 on both sides of the toothed plate 54 slide along the sliding grooves 141 on the outer side of the top fixing strip 14 inside the vacuum carburizing furnace body 1. Through the sliding cooperation between the sliding strips 541 and the sliding grooves 141, the movement of the toothed plate 54 can be guided and limited to prevent it from deviating. Since the bottom of the rear side of the toothed plate 54 is fixed to the top of the telescopic ring 542, the toothed plate 54 can drive the telescopic ring 542 to slide synchronously between the outer sleeve and the inner sleeve of the rotating tank 2. The outer side of the insulation plate 4 is fixed to the inner side of the telescopic ring 542, which can drive the insulation plate 4 to extend into the vacuum carburizing furnace body 1, so that the insulation plate 4 forms an annular closed heat insulation ring around the workpiece inside the vacuum carburizing furnace body 1, reducing the heat loss of high-temperature gas and ensuring the heat preservation effect.

[0024] Example 3 The third embodiment of this utility model adopts the following technical solution: the synchronous linkage mechanism includes a bevel gear 6, a fixed shaft 62, a shaft bracket 621, a linkage gear 64, and a linkage gear 65. The bevel gear 6 is fixedly installed at the end of the rotating shaft 61 away from the stepper motor 51. Two sets of shaft brackets 621 are provided, and the bottom of the two sets of shaft brackets 621 are fixedly installed with the top of the fixing ring 11. The two ends of the fixed shaft 62 are rotatably installed with the two sets of shaft brackets 621 respectively. The fixed shaft 62 is close to the rotating shaft 61. A second bevel gear 63 is fixedly installed at one end, meshing with a first bevel gear 6. A first linkage gear 64 is fixedly installed on the surface of a second fixed shaft 62 and located inside the two sets of second shaft supports 621. A second linkage gear 65 is located to the right of the first linkage gear 64 and meshes with the first linkage gear 64. The rotating mechanism includes a second rotating shaft 7, a third shaft support 701, a third linkage gear 71, and a gear ring 72. The third shaft support 701 is fixedly installed near the bottom of the stepper motor 51 and the top of the fixed ring 11. The bottom of the third shaft 701, away from the stepper motor 51, is rotatably engaged with the top of the rotating tank 2. Both ends of the second rotating shaft 7 are rotatably mounted to the third shaft 701. The second linkage gear 65 is fixedly mounted on the surface of the second rotating shaft 7 near the stepper motor 51. The third linkage gear 71 is fixedly mounted on the end of the second rotating shaft 7 away from the fixed ring 11. The gear ring 72 is fixedly mounted on the outer sleeve of the rotating tank 2 away from the fixed ring 11, and meshes with the third linkage gear 71. The rotating support assembly includes a support frame 31 and a support wheel 32. The bottom of the rotating tank 2 is provided with a fixing plate 3, which is fixedly installed on the ground and flush with the bottom of the support leg 12 at the bottom of the vacuum carburizing furnace body 1. There are four sets of support frames 31, which are fixedly installed at the four corners of the top of the fixing plate 3. The support wheel 32 is rotatably installed with the support frame 31 through the shaft pin. The surface of the support wheel 32 is in contact with the outer side of the rotating tank 2. Several sets of ring-shaped cleaning steel brushes 21 are fixedly installed on the outer surface of the inner sleeve of the rotating tank 2, and are used to clean the surface of the insulation board 4.

[0025] Specifically, when the stepper motor 51 starts, its output shaft 61 rotates synchronously, which in turn drives the bevel gear 6 at the end of the shaft 61 away from the stepper motor 51 to rotate synchronously. Since the bevel gear 6 meshes with the bevel gear 63 at the end of the fixed shaft 62, and the fixed shaft 62 is rotatably mounted on the top of the fixed ring 11 through two sets of shaft brackets 621, the rotational power of the bevel gear 6 is transmitted to the bevel gear 63 through the meshing action, and drives the fixed shaft 62 to rotate around its own axis, realizing the conversion of power direction. When the fixed shaft 62 rotates, the linkage gear 64 on its surface rotates synchronously. Wheel 64 meshes with the right-side linkage gear 65, which is fixedly mounted on the surface of the rotating shaft 7 near the stepper motor 51, thereby driving the rotating shaft 7 to rotate. One side of the shaft bracket 701 is fixed to the top of the fixing ring 11, and the bottom of the other side is inlaid with balls. These balls contact and engage with the top of the rotating tank 2, providing stable support for the rotating shaft 7 while reducing frictional resistance between the shaft bracket 701 and the rotating tank 2, ensuring smooth rotation of the rotating tank 2. When the rotating shaft 7 rotates, it drives the linkage gear 71 at the end of the rotating shaft 7 away from the fixing ring 11 to rotate. 71 meshes with the gear ring 72 on the side of the outer sleeve of the rotating tank 2 away from the fixed ring 11. Therefore, when the rotating shaft 7 rotates, the linkage gear 71 drives the gear ring 72 to rotate through the meshing action, thereby driving the rotating tank 2 to rotate around the rotation connection point on the rear side of the fixed ring 11. During the rotation of the rotating tank 2, the support wheels 32, which are rotatably mounted on the support frames 31 at the top four corners of the bottom fixed plate 3 via shaft pins, are always in contact with the outer surface of the rotating tank 2. The support wheels 32 roll synchronously with the rotation of the rotating tank 2, providing vertical support force to the rotating tank 2 and preventing it from sinking or shifting due to its own weight or rotational inertia. Rolling friction reduces rotational resistance, ensuring the smooth rotation of the rotating tank 2. Several sets of annularly distributed cleaning steel brushes 21 on the outer surface of the inner sleeve of the rotating tank 2 rotate synchronously with the rotation of the rotating tank 2. The bristles of the cleaning steel brushes 21 are in continuous contact with the surface of the insulation plate 4 between the outer sleeve and the inner sleeve of the rotating tank 2. During the rotation of the cleaning steel brushes 21 with the rotating tank 2, they can simultaneously clean the surface of the insulation plate 4 of any residual carburizing agent or dust that may be attached to it, avoiding the accumulation of impurities that may affect the expansion and contraction flexibility and insulation effect of the insulation plate 4. At the same time, it reduces the wear of impurities on the surface of the insulation plate 4 and extends the service life of the insulation plate 4.

[0026] Working principle: Before starting the equipment, the workpiece to be processed is placed into the vacuum carburizing furnace body 1 through the furnace door 101 connected by the front hinge. After closing the furnace door 101, the inside of the vacuum carburizing furnace body 1 is evacuated to provide a vacuum environment for subsequent carburizing operations. The support legs 12 at the four corners of the bottom of the vacuum carburizing furnace body 1 provide stable bottom support for the entire equipment, ensuring smooth operation. Then, the heating elements 15 fixed inside the fixing strip 14 are activated. The heating elements 15 are evenly distributed in a ring along the inner wall of the vacuum carburizing furnace body 1, and begin to heat the inside of the vacuum carburizing furnace body 1. The environment is uniformly heated, and simultaneously, nozzles 13 arranged in a ring at equal intervals on the inner wall of the vacuum carburizing furnace body 1 uniformly introduce carburizing agent into the vacuum carburizing furnace body 1, providing the necessary carbon source for carburizing the workpiece; when the temperature inside the vacuum carburizing furnace body 1 reaches the set value and needs to be maintained, the telescopic drive mechanism fixed to the top of the fixed ring 11 is activated. The base 5 provides a stable mounting foundation for the stepper motor 51. After the stepper motor 51 is started, it drives the rotating shaft 61 fixed at its output end to rotate. The rotating shaft 61 is rotatably mounted on the top of the fixed ring 11 through the shaft brackets 551 on both sides. 51 provides reliable support for the rotating shaft 61 to ensure its rotational stability. The drive gear 52 on the surface of the rotating shaft 61 rotates synchronously with it. Since the drive gear 52 meshes with the drive gear 53 fixed on the fixed shaft 55 inside the shaft bracket 551, the rotational power of the drive gear 52 is transmitted to the drive gear 53, causing it to rotate around the fixed shaft 55. The drive gear 53 then meshes with the toothed plate 54, thereby pushing the toothed plate 54 to move horizontally into the interior of the vacuum carburizing furnace body 1. The slide bars 541 on both sides of the toothed plate 54 engage with the vacuum carburizing... The sliding groove 141 on the outside of the top fixing strip 14 inside the furnace body 1 is slidably engaged to provide guidance and limit for the movement of the toothed plate 54 and prevent it from deviating. The bottom rear side of the toothed plate 54 is fixedly connected to the telescopic ring 542 which is slidably installed between the outer sleeve and the inner sleeve of the rotating tank 2. Therefore, when the toothed plate 54 moves, it will drive the telescopic ring 542 to slide synchronously. The outer side of the insulation plate 4 is fixed to the inner side of the telescopic ring 542, which in turn drives several sets of annularly distributed insulation plates 4 to extend into the vacuum carburizing furnace body 1, thereby reducing the heat loss of the high-temperature gas inside the vacuum carburizing furnace body 1 and ensuring the insulation effect.While rotating shaft 61 rotates, bevel gear 6, fixed at the end away from stepper motor 51, rotates synchronously. Bevel gear 6 meshes with bevel gear 63 at the end of fixed shaft 62. Fixed shaft 62 is rotatably mounted on top of fixed ring 11 via two sets of shaft brackets 621. The rotational power of bevel gear 6 is transmitted to bevel gear 63, causing fixed shaft 62 to rotate around its own axis, thus realizing the conversion of power direction. Linkage gear 64 on the surface of fixed shaft 62 rotates synchronously with it. Linkage gear 64 meshes with linkage gear 65 on the right side. Linkage gear 65 is fixed on the surface of rotating shaft 7 near stepper motor 51, thereby driving rotating shaft 7 to rotate. Shaft bracket 701 is fixed to the top of fixed ring 11 on one side and has balls embedded in the bottom of the other side. Through the contact and engagement of the balls with the top of rotating tank 2, it provides stable support for rotating shaft 7 while reducing the frictional resistance between shaft bracket 701 and rotating tank 2, ensuring the rotation of rotating tank 2. Smoothly, the linkage gear 71 at the end of the rotating shaft 2 away from the fixed ring 11 rotates synchronously with it. The linkage gear 71 meshes with the gear ring 72 on the side of the outer sleeve of the rotating tank 2 away from the fixed ring 11, thereby driving the gear ring 72 to rotate. This drives the rotating tank 2 to rotate around the rotation connection point behind the fixed ring 11. During the rotation of the rotating tank 2, the support wheels 32, which are rotatably mounted on the four corner support frames 31 at the top of the bottom fixed plate 3 via shaft pins, are always in contact with the outer surface of the rotating tank 2. The support wheels 32 roll synchronously with the rotating tank 2, providing vertical support force to prevent it from sinking or shifting. At the same time, the rolling friction reduces the rotational resistance, ensuring that the rotating tank 2 rotates smoothly. During this process, the cleaning steel brushes 21, which are equidistantly arranged in a ring on the outer surface of the inner sleeve of the rotating tank 2, rotate synchronously with the rotating tank 2. Their bristles are in continuous contact with the surface of the insulation board 4, cleaning the residual carburizing agent, dust, and other impurities adhering to the surface of the insulation board 4 in real time, ensuring the flexibility of the insulation board 4 and the insulation effect.

[0027] The vacuum carburizing furnace body, stepper motor, gear plate, bevel gear one and bevel gear two used in this application can be additionally equipped with protective measures known in the art under different usage environments, including but not limited to the following methods, such as protective covers for equipment protection, dustproof nets for equipment dust prevention, and sealing components or waterproof coatings for equipment waterproofing, which are commonly used by those skilled in the art.

[0028] It should be noted that (the vacuum carburizing furnace body, stepper motor, gear plate, bevel gear one and bevel gear two) are existing devices or equipment, or devices or equipment that can be implemented by existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the equipment, as well as the materials of each accessory and the selection of various parameters are common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0029] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0030] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0031] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0032] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vacuum carburizing furnace with high-efficiency heat preservation function, comprising a vacuum carburizing furnace body (1), wherein a furnace door (101) is rotatably mounted on the front side of the vacuum carburizing furnace body (1) via a hinge, a fixing ring (11) is fixedly mounted on the rear side of the vacuum carburizing furnace body (1), and a plurality of sets of nozzles (13) for introducing carburizing agent are distributed in a ring at equal intervals on the inner wall of the vacuum carburizing furnace body (1), and a plurality of sets of fixing strips (14) are arranged in a ring at equal intervals on the inner wall of the vacuum carburizing furnace body (1), wherein the inner side of the fixing strips (14) is... A heating element (15) is fixedly installed on the side. Support legs (12) are fixedly installed at the four corners of the bottom of the vacuum carburizing furnace body (1). A rotating tank (2) is rotatably installed on the rear side of the fixing ring (11). The rotating tank (2) is composed of an outer sleeve and an inner sleeve. Several sets of heat insulation plates (4) are arranged in a ring at equal intervals between the outer sleeve and the inner sleeve of the rotating tank (2). A heat insulation plate (22) is fixedly installed on the inner wall of the inner sleeve of the rotating tank (2) near the vacuum carburizing furnace body (1) to prevent high temperature loss. The feature is: It also includes a telescopic drive mechanism, a rotating mechanism, a synchronous linkage mechanism and a rotating support assembly. The telescopic drive mechanism is set on the top of the fixed ring (11) and is used to drive the insulation board (4) to perform telescopic movement. The synchronous linkage mechanism is located on the top of the rotating tank (2) and is used to transmit the power of the telescopic drive mechanism to the rotating mechanism. The rotating mechanism is located on the top of the rotating tank (2) and is used to drive the rotating tank (2) to rotate in conjunction with the synchronous linkage mechanism. The rotating support assembly is disposed at the bottom of the rotating tank (2) and is used to provide stable support for the rotation of the rotating tank (2).

2. The vacuum carburizing furnace with high-efficiency heat preservation function according to claim 1, characterized in that: The telescopic drive mechanism includes a base (5), a stepper motor (51), a first drive gear (52), a second drive gear (53), a gear plate (54), a telescopic ring (542), a first fixed shaft (55), a first shaft bracket (551), and a first rotating shaft (61). The base (5) is fixedly mounted on the top of the fixed ring (11), the stepper motor (51) is fixedly mounted on the top of the base (5), the first rotating shaft (61) is fixedly connected to the output end of the stepper motor (51), the first drive gear (52) is fixedly mounted on the surface of the first rotating shaft (61), and the first shaft bracket (551) located on both sides of the first drive gear (52) is rotatably mounted on the surface of the first rotating shaft (61). 551), the bottom of the first shaft bracket (551) is fixedly installed with the top of the fixed ring (11), the two ends of the first fixed shaft (55) are fixedly installed with the inner side of the first shaft bracket (551), the second drive gear (53) is rotatably installed on the surface of the first fixed shaft (55), the first drive gear (52) meshes with the second drive gear (53), the telescopic ring (542) is slidably installed between the outer sleeve and the inner sleeve of the rotating tank (2), the bottom of the rear side of the toothed plate (54) is fixedly installed with the top of the telescopic ring (542), the second drive gear (53) meshes with the toothed plate (54), and the outer side of the insulation plate (4) is fixedly installed with the inner side of the telescopic ring (542).

3. A vacuum carburizing furnace with high-efficiency heat preservation function according to claim 2, characterized in that: Both sides of the toothed plate (54) are fixedly installed with slide bars (541), and a set of fixed bars (14) located at the top inside the vacuum carburizing furnace body (1) has a sliding groove (141) that slides and engages with the slide bars (541) on the outside.

4. A vacuum carburizing furnace with high-efficiency heat preservation function according to claim 2, characterized in that: The synchronous linkage mechanism includes a bevel gear one (6), a fixed shaft two (62), a shaft bracket two (621), a linkage gear one (64), and a linkage gear two (65). The bevel gear one (6) is fixedly installed at the end of the rotating shaft one (61) away from the stepper motor (51). Two sets of shaft bracket two (621) are provided. The bottom of the two sets of shaft bracket two (621) is fixedly installed with the top of the fixing ring (11). The two ends of the fixed shaft two (62) are respectively connected to the two sets of shaft bracket two (621). 1) Rotary installation: a bevel gear 2 (63) is fixedly installed at one end of the fixed shaft 2 (62) near the rotating shaft 1 (61). The bevel gear 2 (63) meshes with the bevel gear 1 (6). The linkage gear 1 (64) is fixedly installed on the surface of the fixed shaft 2 (62) and located inside the two sets of shaft brackets 2 (621). The linkage gear 2 (65) is located on the right side of the linkage gear 1 (64) and meshes with the linkage gear 1 (64).

5. A vacuum carburizing furnace with high-efficiency heat preservation function according to claim 4, characterized in that: The rotating mechanism includes a second rotating shaft (7), a third shaft bracket (701), a third linkage gear (71), and a gear ring (72). The third shaft bracket (701) is fixedly installed near the bottom of the stepper motor (51) and the top of the fixed ring (11). The bottom of the third shaft bracket (701) away from the stepper motor (51) is rotatably engaged with the top of the rotating tank (2). The two ends of the second rotating shaft (7) are rotatably installed with the third shaft bracket (701). The second linkage gear (65) is fixedly installed on the surface of the second rotating shaft (7) near the stepper motor (51). The third linkage gear (71) is fixedly installed at the end of the second rotating shaft (7) away from the fixed ring (11). The gear ring (72) is fixedly installed on the side of the outer sleeve of the rotating tank (2) away from the fixed ring (11). The gear ring (72) meshes with the third linkage gear (71).

6. A vacuum carburizing furnace with high-efficiency heat preservation function according to claim 1, characterized in that: The rotating support assembly includes a support frame (31) and a support wheel (32). A fixed plate (3) is provided at the bottom of the rotating tank (2). The fixed plate (3) is fixedly installed on the ground and is flush with the bottom of the support leg (12) at the bottom of the vacuum carburizing furnace body (1). There are four sets of support frames (31). The four sets of support frames (31) are fixedly installed at the four corners of the top of the fixed plate (3). The support wheel (32) is rotatably installed with the support frame (31) through a shaft pin. The surface of the support wheel (32) is in contact with the outside of the rotating tank (2).

7. A vacuum carburizing furnace with high-efficiency heat preservation function according to claim 1, characterized in that: The outer surface of the inner sleeve of the rotating tank (2) is fixedly equipped with several cleaning steel brushes (21) arranged in a ring at equal intervals, which are used to clean the surface of the insulation board (4).

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