Multi-temperature-zone continuous sintering furnace

Abstract

The invention discloses a multi-temperature-zone continuous sintering furnace, and relates to the technical field of sintering furnaces, the multi-temperature-zone continuous sintering furnace comprises sintering furnace fixing seats and a sintering furnace rotating cylinder, the sintering furnace fixing seats rotate relative to the sintering furnace rotating cylinder, the interior of the sintering furnace rotating cylinder is divided into three stages of temperature zones, a rotating shaft is arranged between the sintering furnace fixing seats, and the rotating shaft is connected with the sintering furnace fixing seats. The rotating shaft is rotationally connected relative to the interior of the sintering furnace rotating cylinder. Materials in the sintering furnace rotary drum can be pushed to a high-temperature area while being stirred, uneven heating of the materials in the temperature areas in all stages is avoided, the inner wall of the sintering furnace rotary drum can be scraped through second spiral blades, and therefore the situation that the materials are retained on the inner wall of the sintering furnace rotary drum is avoided, and the service life of the sintering furnace rotary drum is prolonged. And the third spiral blade is shifted by the shifting pin while the third spiral blade is in contact with the shifting pin, so that partial materials at the bottom end of the sintering furnace rotary drum are pushed to a high-temperature area from a low-temperature area, and the continuity of conveying of the materials in the sintering furnace rotary drum is ensured.

Description

Technical Field

[0001] This invention relates to the field of sintering furnace technology, specifically to a multi-temperature zone continuous sintering furnace. Background Technology

[0002] The multi-temperature zone sintering furnace consists of five main parts: heating system, temperature control system, furnace body structure, vacuum system, and auxiliary system. These parts work together to achieve precise control of the multi-temperature zones. The heating rate, holding temperature, and time of each temperature zone can be set by PLC or touch screen. Each temperature zone is independently controlled. During the sintering process, the heating elements heat different temperature zones according to the set program, so that a specific temperature gradient is formed in the furnace. The corresponding atmosphere or vacuum environment is created by the atmosphere or vacuum system, so that the material can be continuously sintered under the set temperature and atmosphere conditions. In the existing technology, sintering furnaces have certain drawbacks. The material is moved by rotating the sintering furnace drum, but it is impossible to achieve uniform stirring of the heated material inside the drum. The material is prone to local accumulation, which creates temperature differences. A large amount of material is retained in the low-temperature zone, resulting in incomplete sintering and a reduced product qualification rate. In addition, the second spiral blades cannot scrape the inner wall of the drum. The material is very easy to adhere to and remain firmly on the inner wall. Long-term accumulation will weaken the heat conduction efficiency of the drum, disrupt the stability of the temperature field inside the furnace, and the retention of material is difficult to clean, which seriously affects the continuity of production. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-temperature zone continuous sintering furnace to solve the problems mentioned in the background art.

[0004] The objective of this invention can be achieved through the following technical solutions: A multi-temperature zone continuous sintering furnace includes a sintering furnace base and a sintering furnace rotating drum. The sintering furnace base rotates relative to the sintering furnace rotating drum. The interior of the sintering furnace rotating drum is divided into three temperature zones. A rotating shaft is provided between the sintering furnace bases and is rotatably connected to the interior of the sintering furnace rotating drum. One end of the sintering furnace base is provided with a feed inlet, and the other end is provided with a discharge outlet. A mixing and stirring assembly is provided inside the sintering furnace rotating drum. The mixing and stirring assembly includes three sets of first helical blades, and each of the three sets of first helical blades has a reinforcing rod welded to both ends. Each reinforcing rod is connected to... The sintering furnace rotary drum is welded together, and each of the first spiral blades rotates relative to the inner wall of the sintering furnace rotary drum. The first spiral blades are used to stir and transport the material inside the sintering furnace rotary drum. Spacer blocks are welded to both ends of the three sets of first spiral blades. A first fixed shaft is installed between the corners of the three sets of spacer blocks. Several second spiral blades are welded to the outside of the first fixed shaft and between the spacer blocks. The second spiral blades are in contact with the inside of the sintering furnace rotary drum. The friction between the second spiral blades and the inner wall of the sintering furnace rotary drum is used to scrape the heated material on the inner wall of the sintering furnace rotary drum.

[0005] As a preferred embodiment of the present invention, the three sets of spacers correspond to the three temperature zones inside the sintering furnace rotary drum, and the three sets of first spiral blades are located in the three temperature zones inside the sintering furnace rotary drum. The outer diameter of each first spiral blade is adapted to the inner wall diameter of the sintering furnace rotary drum. The first spiral blades are used to stir the materials inside the three temperature zones. The pitch of the three first spiral blades increases sequentially. The first spiral blade with a larger pitch is located in the low temperature zone, and the first spiral blade with a smaller pitch is located in the high temperature zone. The first spiral blades with different pitches turn the heated materials at different speeds.

[0006] As a preferred technical solution of the present invention, each of the spacers is provided with a first reserved hole at the corner and at the intersection of the spacer and each of the first fixed shafts. A first rotating sleeve is installed inside the first reserved hole. The first rotating sleeve is a graphite-based composite material or a tungsten-based alloy. Each of the first fixed shafts is rotatably connected to the spacer through the first rotating sleeve. The first rotating sleeve is used to ensure that the first fixed shaft rotates normally.

[0007] As a preferred technical solution of the present invention, a reserved groove is provided in the middle of each of the second helical blades and at the position where the first fixed shaft intersects with the first helical blade. The reserved groove is used to prevent the second helical blade from interfering with the first helical blade when it rotates.

[0008] As a preferred embodiment of the present invention, a first spur gear is provided at the end of each of the first fixed shafts and at the low-temperature zone partition block, and a second spur gear is provided outside the rotating shaft and at the low-temperature zone partition block, and each of the first spur gears meshes with the second spur gear.

[0009] As a preferred embodiment of the present invention, the second spur gear is rotatably connected to the end of the rotating shaft, and the three first spur gears are arranged in a circular array about the axis of the rotating shaft on the surface of the spacer block. The first spur gears and the second spur gears are used to ensure that the second helical blades on each first fixed shaft rotate.

[0010] As a preferred embodiment of the present invention, a material pushing component is provided at the edge of the spacer block and at the opposite position of two adjacent sets of spacers. The material pushing component includes side strips, which are integrally provided at both ends of each edge of the spacer block. Each side of the side strip is provided with a second fixed shaft, which is mounted on the two side strips of each side of the spacer block. The two ends of the second fixed shaft are rotatably connected to the side strips respectively. A third spiral blade and a deflecting blade are welded to the outside of the second fixed shaft. At least six deflecting pins are welded to the inner wall of the sintering furnace drum. The deflecting pins are used to deflect the deflecting blades that rotate synchronously with the spacer block. The third spiral blade and the deflecting blades are used to push the heated material in different temperature zones to the next temperature zone.

[0011] As a preferred technical solution of the present invention, each of the side strips has a second reserved hole at its end, and a second rotating sleeve is installed inside each second reserved hole. The second rotating sleeve is a graphite-based composite material or a tungsten-based alloy. Each second fixed shaft is rotatably connected to the end of the side strip through the second rotating sleeve. The second rotating sleeve is used to ensure the normal rotation of the second fixed shaft.

[0012] As a preferred embodiment of the present invention, both ends of the second fixed shaft are threaded with fixing nuts. The fixing nuts are used to restrict the actuating blade between the two side strips. The axial position of each actuating pin is offset from the planar position of the spacer block. At least three of the actuating pins have their ends in contact with the actuating blade to ensure that the actuating pins can rotate the actuating blade around the second fixed shaft.

[0013] As a preferred embodiment of the present invention, the position of the actuating pin is located within the rotation range of the actuating blade as the spacer block rotates, and the actuating pin actuates the actuating blade as the spacer block rotates relative to the sintering furnace drum.

[0014] Compared with the prior art, the beneficial effects of the present invention are: Equipped with a mixing and stirring component, the first spiral blades stir the heated material inside the sintering furnace drum when the drum rotates relative to the rotating shaft. This stirs the material inside the drum and pushes it towards the high-temperature zone, preventing uneven heating of the material in different temperature zones. The first fixed shaft and the second spiral blade cooperate, and the spacer block contacts the inner wall of the sintering furnace drum, thereby rotating the second spiral blade around the first fixed shaft. This can scrape the inner wall of the sintering furnace drum, thus preventing material from being stuck on the inner wall of the sintering furnace drum. Equipped with a material pushing component, when the spacer block rotates relative to the inside of the sintering furnace drum, the third spiral blade contacts the deflecting pin, and at the same time the deflecting pin deflects the third spiral blade, thereby pushing part of the material at the bottom of the sintering furnace drum from the low temperature zone to the high temperature zone, ensuring the continuity of material conveying inside the sintering furnace drum. The mixing and stirring components and the material pushing components work together. The second spiral blade can stir the material inside the sintering furnace drum and push it towards the high-temperature zone at the same time. The third spiral blade can stir the material at the bottom of the sintering furnace drum and push it towards the high-temperature zone at the same time. They complement each other to ensure that the material is delivered to the high-temperature zone inside the sintering furnace drum. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a structural diagram of the main body of a multi-temperature zone continuous sintering furnace according to the present invention; Figure 2 This is a schematic diagram of the rotating shaft of a multi-temperature zone continuous sintering furnace according to the present invention; Figure 3 This is a schematic diagram of the mixing and stirring assembly of a multi-temperature zone continuous sintering furnace according to the present invention; Figure 4 This is a schematic diagram of the first fixed shaft and the second spiral blade of a multi-temperature zone continuous sintering furnace according to the present invention. Figure 5 This is a schematic diagram of the first and second spur gears of a multi-temperature zone continuous sintering furnace according to the present invention. Figure 6 This is a schematic diagram of a material pushing component for a multi-temperature zone continuous sintering furnace according to the present invention; Figure 7 This is a schematic diagram of the third spiral blade and the agitator blade of a multi-temperature zone continuous sintering furnace according to the present invention. Figure 8 This is a schematic diagram of the contact between the actuating pin and the second fixed shaft in a multi-temperature zone continuous sintering furnace according to the present invention.

[0017] In the diagram: 1. Sintering furnace fixed base; 2. Sintering furnace rotary drum; 3. Rotating shaft; 4. Mixing and stirring assembly; 5. Material pushing assembly; 6. Feed inlet; 7. Discharge outlet; 41. First spiral blade; 42. Reinforcing rod; 43. Spacer block; 44. First fixed shaft; 45. Second spiral blade; 46. First rotating sleeve; 47. Reserved groove; 48. First spur gear; 49. Second spur gear; 51. Side strip; 52. Second fixed shaft; 53. Third spiral blade; 54. Second rotating sleeve; 55. Fixed nut; 56. Actuating pin; 57. Actuating blade. Detailed Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1:

[0020] Please see Figure 1 - Figure 5As shown, a multi-temperature zone continuous sintering furnace includes a sintering furnace base 1 and a sintering furnace rotating drum 2. The sintering furnace base 1 rotates relative to the sintering furnace rotating drum 2. A drive reducer for driving the sintering furnace rotating drum 2 is installed in the middle of the sintering furnace base 1, thereby causing the sintering furnace rotating drum 2 to rotate between the sintering furnace base 1s. The material inside the sintering furnace rotating drum 2 can be sintered. The interior of the sintering furnace rotating drum 2 is divided into three temperature zones: a low-temperature zone, a medium-temperature zone, and a high-temperature zone. The low-temperature zone, medium-temperature zone, and high-temperature zone are arranged sequentially. A [missing information - likely a device or structure] is provided between the sintering furnace base 1s. A rotating shaft 3 is rotatably connected to the interior of the sintering furnace rotary drum 2, allowing the material to tumble within the drum. The material is heated while the drum is in operation. A feed inlet 6 is located at one end of the sintering furnace mounting base 1, and a discharge outlet 7 is located at the other end. A mixing and stirring assembly 4 is installed inside the rotary drum 2. This assembly includes three sets of first spiral blades 41, each with a reinforcing rod 42 welded to both ends. Each reinforcing rod 42 is welded to the rotary drum 2, and each first spiral blade 41 is connected to the sintering furnace. The inner walls of the rotating drum 2 rotate relative to each other. The first spiral blades 41 are used to stir and transport the material inside the rotating drum 2 of the sintering furnace. The rotating drum 2 of the sintering furnace and the fixed base 1 of the sintering furnace remain relatively unchanged. The first spiral blades 41 can stir and transport the material inside the rotating drum 2 of the sintering furnace. Spacer blocks 43 are welded to both ends of the three sets of first spiral blades 41. A first fixed shaft 44 is installed between the corners of the three sets of spacer blocks 43. Several second spiral blades 45 are welded to the outside of the first fixed shafts 44 and between each spacer block 43. The second spiral blades 45 and The inner surfaces of the sintering furnace rotary drum 2 are in contact. When the first spiral blade 41 rotates relative to the sintering furnace rotary drum 2, the third spiral blade 53 comes into contact with the interior of the sintering furnace rotary drum 2 and generates friction. As a result, the third spiral blade 53 rotates around the first fixed shaft 44. The friction between the second spiral blade 45 and the inner wall of the sintering furnace rotary drum 2 is used to scrape the heated material on the inner wall of the sintering furnace rotary drum 2. The first spiral blade 41 stirs the material inside the sintering furnace rotary drum 2, and the third spiral blade 53 can scrape the inner wall of the sintering furnace rotary drum 2 to prevent the material from adhering to the inner wall of the sintering furnace rotary drum 2.

[0021] Please see Figure 2 and Figure 3As shown, the three sets of spacer blocks 43 correspond to the three temperature zones inside the sintering furnace rotary drum 2, and the three sets of first spiral blades 41 are located in the three temperature zones inside the sintering furnace rotary drum 2. Because the first spiral blades 41 rotate, they can move the material from the low-temperature zone, the medium-temperature zone, and the high-temperature zone, thus heating the material at different temperatures. The outer diameter of each first spiral blade 41 is matched with the inner diameter of the sintering furnace rotary drum 2. The first spiral blades 41 are used to stir the material inside the three temperature zones. The pitch of the three first spiral blades 41 increases sequentially, with the largest pitch increasing the value. The first spiral blade 41 is located in the low-temperature zone, and the first spiral blade 41 with a smaller pitch is located in the high-temperature zone. The first spiral blades 41 with different pitches agitate the heated material at different speeds. Since the first spiral blade 41 in the low-temperature zone corresponds to the low-temperature zone of the sintering furnace drum 2, the first spiral blade 41 with a larger thread pitch agitates the material more slowly. The first spiral blade 41 in the high-temperature zone corresponds to the high-temperature zone of the sintering furnace drum 2, so the first spiral blade 41 with a smaller thread pitch agitates the material more quickly and agitates the material more frequently.

[0022] Please see Figure 4 and Figure 5 As shown, each spacer block 43 has a first reserved hole at its corner and at the intersection of the spacer block 43 and each first fixed shaft 44. A first rotating sleeve 46 is installed inside each first reserved hole. The first rotating sleeve 46 is made of graphite-based composite material or tungsten-based alloy. Each first fixed shaft 44 is rotatably connected to the spacer block 43 through the first rotating sleeve 46. The first rotating sleeve 46 is used to ensure the normal rotation of the first fixed shaft 44. When the second spiral blade 45 comes into contact with the inner wall of the sintering furnace drum 2, friction is generated, so the second spiral blade 45 can rotate around the first rotating sleeve 46. Thus, the second spiral blade 45 can scrape the inner wall of the sintering furnace drum 2. The first spiral blade 41, the reinforcing rod 42, and the second spiral blade 45 inside the sintering furnace drum 2 are all made of high-temperature resistant materials, such as ceramic materials or high-temperature resistant metal materials. Thus, heating inside the sintering furnace drum 2 can make the material of the mixing and stirring assembly 4 rotate.

[0023] Please see Figure 5 As shown, a reserved groove 47 is provided in the middle of each second helical blade 45 at the intersection of the first fixed shaft 44 and the first helical blade 41. The reserved groove 47 is used to prevent the second helical blade 45 from interfering with the first helical blade 41 when it rotates. The second helical blade 45 rotates relative to the first helical blade 41 and interferes with the first helical blade 41. The reserved groove 47 provided in the second helical blade 45 prevents the first helical blade 41 and the second helical blade 45 from interfering with each other.

[0024] Please see Figure 5As shown, a first spur gear 48 is provided at the end of each first fixed shaft 44 and at the low-temperature zone partition block 43. A second spur gear 49 is provided outside the rotating shaft 3 and at the low-temperature zone partition block 43. Each first spur gear 48 meshes with the second spur gear 49. Each second helical blade 45 contacts the inner wall of the sintering furnace drum 2, causing the second helical blade 45 to rotate. Through the meshing of the second spur gear 49 with each first spur gear 48, the first spur gear 48 can rotate each second helical blade 45. The second spur gear 49 is rotatably connected to the end of the rotating shaft 3. The three first spur gears 48 are arranged in a circular array about the axis of the rotating shaft 3 on the surface of the partition block 43. The first spur gears 48 and the second spur gears 49 are used to ensure that the second helical blades 45 on each first fixed shaft 44 rotate. When the sintering furnace drum 2 rotates, it rotates relative to the partition block 43, and the second helical blades 45 on each first fixed shaft 44 rotate.

[0025] It should be noted that the material is put into the sintering furnace through the feed port 6 of the fixed base 1. The sintering furnace drum 2 is rotated by the reducer, and the material inside the sintering furnace drum 2 can be heated. The rotating drum 2 rotates while the rotating shaft 3 is fixed. The rotation of the sintering furnace drum 2 causes the material to be stirred by the first spiral blade 41. The material can also be moved from the low temperature zone to the high temperature zone. The second spiral blade 45 of the first fixed shaft 44 contacts the inner wall of the sintering furnace drum 2, so that the second spiral blade 45 rotates around the first fixed shaft 44. The second spiral blade 45 can scrape the material inside the sintering furnace drum 2 and push the material from the low temperature zone to the high temperature zone. The second spur gear 49 and the first spur gear 48 are engaged, so that the second spur gear 49 can drive the second spiral blade 45 on each of the first fixed shafts 44 to rotate, ensuring the scraping effect of the material inside the sintering furnace drum 2. Finally, the material is discharged from the discharge port 7.

[0026] Please see Figure 2 , Figure 6 - Figure 8As shown, a material pushing component 5 is provided at the edge of the spacer block 43 and at the opposite position of two adjacent sets of spacer blocks 43. The material pushing component 5 includes a side strip 51, which is integrally provided at both ends of each edge of the spacer block 43. Each side of the side strip 51 is provided with a second fixed shaft 52, which is mounted on the two side strips 51 on each side of the spacer block 43. The two ends of the second fixed shaft 52 are rotatably connected to the side strips 51 respectively. The second fixed shaft 52 can rotate around the two ends of each edge of the spacer block 43. A third spiral blade 53 and a toggle blade 57 are welded to the outside of the second fixed shaft 52. The blade 53 and the agitator 57 rotate with the second fixed shaft 52. The inner wall of the sintering furnace rotary drum 2 is welded with no less than six agitator pins 56. The agitator pins 56 are used to agitate the agitator 57, which rotates synchronously with the spacer block 43. The third spiral blade 53 and the agitator 57 are used to push the heated material in different temperature zones to the next temperature zone. As the sintering furnace rotary drum 2 rotates, the agitator pins 56 agitate the agitator 57. The agitator 57 can rotate around the second fixed shaft 52, thereby rotating the material at the bottom of the sintering furnace rotary drum 2. Thus, the material inside the sintering furnace rotary drum 2 can be pushed to the next temperature zone.

[0027] Please see Figure 6 and Figure 7 As shown, each side strip 51 has a second reserved hole at its end, and a second rotating sleeve 54 is installed inside each second reserved hole. The second rotating sleeve 54 is made of graphite-based composite material or tungsten-based alloy. Each second fixed shaft 52 is rotatably connected to the end of the side strip 51 through the second rotating sleeve 54. The second rotating sleeve 54 is used to ensure the normal rotation of the second fixed shaft 52. Since the second rotating sleeve 54 is made of high-temperature resistant material of graphite-based composite material or tungsten-based alloy, the use of high-temperature resistant material inside the sintering furnace rotary drum 2 enables the third spiral blade 53 and the agitator blade 57 to operate normally. Commonly used metal materials can be used in the low-temperature zone or medium-temperature zone when they are not affected by high temperature. Especially in the high-temperature zone, other components can be made of graphite-based composite material or tungsten-based alloy.

[0028] Please see Figure 6 and Figure 7As shown, both ends of the second fixed shaft 52 are threaded with fixing nuts 55. The fixing nuts 55 are used to restrict the agitator 57 between the two side strips 51. The second fixed shaft 52 can be inserted into the side strip 51 first, and then the fixing nuts 55 can be used to restrict the second fixed shaft 52 into the side strip 51. The second fixed shaft 52 can rotate normally inside the side strip 51. The axial position of each agitator pin 56 is offset from the plane position of the spacer block 43. At least three agitator pins 56 have their ends in contact with the agitator 57, ensuring that the agitator pins 56 can rotate the agitator 57 around the second fixed shaft 52. The offset position of the agitator pins 56 from the spacer block 43 will not affect the rotation of the spacer block 43 relative to the sintering furnace drum 2.

[0029] Please see Figure 7 and Figure 8 As shown, the position of the actuating pin 56 is located within the rotation range of the actuating blade 57 as the spacer block 43 rotates. When the actuating blade 57 rotates relative to the sintering furnace rotary drum 2 as the spacer block 43 rotates, the actuating pin 56 actuates the actuating blade 57. The actuating pin 56 on the sintering furnace rotary drum 2 rotates, and the spacer block 43 does not interfere with the actuating pin 56. The actuating pin 56 contacts the actuating blade 57, causing the actuating blade 57 to rotate around the second fixed axis 52, so that the material inside the sintering furnace rotary drum 2 can be pushed to the next stage temperature zone.

[0030] It should be noted that the rotation of the sintering furnace drum 2 drives the actuating pin 56 to rotate synchronously. The actuating pin 56 can bring the third spiral blade 53 and the actuating blade 57 into contact. At the same time, the actuating pin 56 actuates the third spiral blade 53, so that the third spiral blade 53 and the actuating blade 57 rotate around the end of the side bar 51, thereby pushing the material from the low temperature zone to the high temperature zone. The third spiral blade 53 and the actuating blade 57 can push part of the material at the bottom of the sintering furnace drum 2.

[0031] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-temperature zone continuous sintering furnace, comprising a sintering furnace base (1) and a sintering furnace rotating drum (2), wherein the sintering furnace base (1) rotates relative to the sintering furnace rotating drum (2), the interior of the sintering furnace rotating drum (2) is divided into three temperature zones, a rotating shaft (3) is provided between the sintering furnace bases (1), the rotating shaft (3) is rotatably connected relative to the interior of the sintering furnace rotating drum (2), one end of the sintering furnace base (1) is provided with a feed inlet (6), and the other end of the sintering furnace base (1) is provided with a discharge outlet (7), characterized in that, The sintering furnace rotary drum (2) is equipped with a mixing and stirring assembly (4). The mixing and stirring assembly (4) includes three sets of first spiral blades (41). Each of the three sets of first spiral blades (41) has a reinforcing rod (42) welded to both ends. Each reinforcing rod (42) is welded to the sintering furnace rotary drum (2). Each first spiral blade (41) rotates relative to the inner wall of the sintering furnace rotary drum (2). The first spiral blades (41) are used to stir the material inside the sintering furnace rotary drum (2) and transport the material. Both ends of the first spiral blade (41) are welded with spacer blocks (43). A first fixed shaft (44) is installed between the corners of the three sets of spacer blocks (43). Several second spiral blades (45) are welded to the outside of the first fixed shaft (44) and between each spacer block (43). The second spiral blades (45) are in contact with the inside of the sintering furnace drum (2). The friction between the second spiral blades (45) and the inner wall of the sintering furnace drum (2) is used to scrape the heated material on the inner wall of the sintering furnace drum (2).

2. The multi-temperature zone continuous sintering furnace according to claim 1, characterized in that, The three sets of spacers (43) correspond to the three temperature zones inside the sintering furnace drum (2). The three sets of first spiral blades (41) are located in the three temperature zones inside the sintering furnace drum (2). The outer diameter of each first spiral blade (41) is adapted to the inner wall diameter of the sintering furnace drum (2). The first spiral blades (41) are used to stir the materials inside the three temperature zones. The pitch of the three first spiral blades (41) increases sequentially. The first spiral blade (41) with a large pitch is located in the low temperature zone, and the first spiral blade (41) with a small pitch is located in the high temperature zone. The first spiral blades (41) with different pitches turn the heated materials at different speeds.

3. The multi-temperature zone continuous sintering furnace according to claim 2, characterized in that, Each of the spacers (43) has a first reserved hole at the corner and at the intersection of the spacer (43) and each of the first fixed shafts (44). Each of the first reserved holes has a first rotating sleeve (46) installed inside. Each of the first fixed shafts (44) is rotatably connected to the spacer (43) through the first rotating sleeve (46). The first rotating sleeve (46) is used to ensure that the first fixed shaft (44) rotates normally.

4. The multi-temperature zone continuous sintering furnace according to claim 3, characterized in that, A reserved groove (47) is provided in the middle of each of the second helical blades (45) at the intersection of the first fixed shaft (44) and the first helical blade (41). The reserved groove (47) is used to prevent the second helical blade (45) from interfering with the first helical blade (41) when it rotates.

5. A multi-temperature zone continuous sintering furnace according to claim 4, characterized in that, Each of the first fixed shafts (44) is provided with a first spur gear (48) at the end of each shaft and at the low temperature zone partition (43), and a second spur gear (49) is provided outside the rotating shaft (3) and at the low temperature zone partition (43). Each of the first spur gears (48) meshes with the second spur gear (49).

6. A multi-temperature zone continuous sintering furnace according to claim 5, characterized in that, The second spur gear (49) is rotatably connected to the end of the rotating shaft (3), and the three first spur gears (48) are arranged in a ring array about the axis of the rotating shaft (3) on the surface of the spacer block (43). The first spur gears (48) and the second spur gears (49) are used to ensure that the second helical blades (45) on each first fixed shaft (44) rotate.

7. A multi-temperature zone continuous sintering furnace according to claim 6, characterized in that, A material pushing component (5) is provided at the edge of the spacer block (43) and at the opposite position of two adjacent sets of spacer blocks (43). The material pushing component (5) includes a side strip (51). The side strip (51) is integrally provided at both ends of each edge of the spacer block (43). Each side of the side strip (51) is provided with a second fixed shaft (52). The second fixed shaft (52) is mounted on the two side strips (51) of each side of the spacer block (43). The two ends of the second fixed shaft (52) are rotatably connected to the side strips (51) respectively. A third spiral blade (53) and a deflecting blade (57) are welded to the outside of the second fixed shaft (52). No less than six deflecting pins (56) are welded to the inner wall of the sintering furnace rotary drum (2). The deflecting pins (56) are used to deflect the deflecting blades (57) that rotate synchronously with the spacer block (43). The third spiral blade (53) and the deflecting blades (57) are used to push the heated material of different temperature zones to the next temperature zone.

8. A multi-temperature zone continuous sintering furnace according to claim 7, characterized in that, Each of the side strips (51) has a second reserved hole at its end. A second rotating sleeve (54) is installed inside each second reserved hole. Each second fixed shaft (52) is rotatably connected to the end of the side strip (51) through the second rotating sleeve (54). The second rotating sleeve (54) is used to ensure that the second fixed shaft (52) rotates normally.

9. A multi-temperature zone continuous sintering furnace according to claim 8, characterized in that, Both ends of the second fixed shaft (52) are threaded with fixing nuts (55). The fixing nuts (55) are used to restrict the actuating blade (57) between the two side strips (51). The axial position of each actuating pin (56) is offset from the planar position of the spacer block (43). At least three of the actuating pins (56) have their ends in contact with the actuating blade (57) to ensure that the actuating pins (56) rotate the actuating blade (57) around the second fixed shaft (52).

10. A multi-temperature zone continuous sintering furnace according to claim 9, characterized in that, The position of the actuating pin (56) is located inside the rotation range of the actuating leaf (57) as the spacer block (43) rotates. When the actuating leaf (57) rotates relative to the sintering furnace drum (2) as the spacer block (43) rotates, the actuating pin (56) actuates the actuating leaf (57) to rotate.

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