Cracking furnace

Abstract

The utility model relates to the field of electric furnaces, in particular to a cracking furnace which comprises a supporting seat, a horizontal cylindrical furnace shell is fixed on the supporting seat, a graphite heating body is arranged in the furnace shell, a sagger is arranged in the graphite heating body, furnace doors are hinged to the two ends of the furnace shell, and each furnace door comprises a furnace door body and a first annular block fixed on the inner side face of the furnace door body. A plurality of arc-shaped sleeves are fixed to the side wall of the first annular block, a second annular block is rotationally connected to the end of the furnace shell, a plurality of arc-shaped inserting blocks are fixed to the side wall of the second annular block, and an annular block pushing mechanism is arranged on the second annular block, so that automatic locking and automatic unlocking of the furnace door are achieved, and the closing and opening efficiency of the furnace door is greatly improved; and due to the arrangement of the first annular block and the second annular block, the contact area between the furnace door and the furnace shell is greatly increased after the furnace shell covers the furnace door, and therefore the sealing performance of the furnace door is improved.

Description

Technical Field

[0001] The utility model relates to the field of electric furnaces, in particular to a cracking furnace. Background Art

[0002] During the processing of ceramic fibers or products, high-temperature cracking is required. This process requires the use of a cracking furnace to heat the ceramic fibers or products at high temperatures. Patent application number CN202122030236.8 discloses a horizontal vacuum induction melting furnace. This melting furnace has the following disadvantages when heating the products: 1) The sealed door of the melting furnace needs to be locked and closed by the operator when closing, and unlocked and opened by the operator when opening, which is very troublesome, inefficient, and poses a safety hazard; 2) The sealing effect of the sealed door is not very good. Therefore, there is an urgent need for a furnace door that can automatically lock and unlock with good sealing effect. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a cracking furnace that solves the problems of the existing technology. The present invention realizes automatic locking and automatic unlocking of the furnace door, greatly improves the efficiency of closing and opening the furnace door, improves safety, and also improves the sealing effect of the furnace door.

[0005] (2) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cracking furnace, comprising a support base, a horizontal cylindrical furnace shell is fixed on the support base, a graphite heating element is provided in the furnace shell, a sagger is provided in the graphite heating element, furnace doors are hinged at both ends of the furnace shell, the furnace door comprises a furnace door body and a first annular block fixed on the inner side surface of the furnace door body, a plurality of arc-shaped sleeves are fixed on the side wall of the first annular block, a second annular block is rotatably connected to the end of the furnace shell, a plurality of arc-shaped plug blocks are fixed on the side wall of the second annular block, and a ring block pushing mechanism is provided on the second annular block.

[0007] Preferably, the arc-shaped insert includes a fixed block fixed on the side wall of the second annular block, on which an arc-shaped insert body matching the arc-shaped sleeve is fixed, and a gap is left between the bottom surface of the arc-shaped insert body and the side wall of the second annular block. The arc-shaped sleeve includes a supporting block fixed on the side wall of the first annular block, and the supporting block includes a fixed part fixed to the first annular block and an extending part extending toward the furnace shell, and the upper surface of the extending part is fixed with the arc-shaped sleeve body.

[0008] Preferably, a layer of graphite soft felt is fixed on the outer end surface of the second annular block, and an embedding groove for embedding the graphite soft felt layer is provided on the inner end surface of the first annular block.

[0009] Preferably, the annular block pushing mechanism includes a connecting block connected to the side wall of the second annular block, the connecting block is hinged to one end of the push rod, the other end of the push rod is fixed to the piston rod end of the cylinder, the tail end of the cylinder is fixed with a connecting rod, the connecting rod is fixed with a connecting plate, the connecting plate is fixed with a fixing rod, and the fixing rod is fixed to the furnace shell.

[0010] Preferably, two annular block pushing mechanisms are provided on the second annular block, and the two annular block pushing mechanisms are centrally symmetrical.

[0011] Preferably, an annular connecting ring is fixed on the top wall of the plurality of arc-shaped inserting blocks.

[0012] Preferably, a hinge shaft connecting frame is fixed on the furnace shell, a hinge shaft is connected to the hinge shaft connecting frame, a furnace door connecting plate is fixed on the hinge shaft, and two upper and lower connecting pieces are fixed on the end of the furnace door connecting plate away from the hinge shaft. The connecting piece is passed through a threaded rod, and the end of the threaded rod close to the arc sleeve is detachably connected to a fixing seat, the fixing seat is fixed on the furnace door body, and both sides of the connecting piece are locked by nuts.

[0013] Preferably, the graphite heating element includes two annular graphite blocks fixed on the inner wall of the furnace shell, the two annular graphite blocks are respectively arranged near the two ends of the furnace shell, and a number of graphite rods are evenly distributed between the two annular graphite blocks.

[0014] Preferably, the sagger is configured to be rectangular and is fixed to the inner wall of the furnace shell via a plurality of connecting columns.

[0015] Preferably, an interlayer is provided in the furnace shell, and cooling water flows through the interlayer.

[0016] (3) Beneficial effects

[0017] 1. The present invention realizes automatic locking and unlocking of the furnace door through the arrangement of the arc-shaped insert pushing mechanism, the first annular block, the arc-shaped sleeve, the second annular block, and the arc-shaped insert, greatly improving the efficiency of closing and opening the furnace door and enhancing safety. The arrangement of the first annular block and the second annular block greatly increases the contact area between the furnace door and the furnace shell after the furnace door is covered with the furnace shell, thereby improving the sealing performance of the furnace door.

[0018] 2. The utility model provides furnace doors at both ends of the furnace shell, so that materials can be loaded or unloaded from both ends of the furnace shell at the same time. For horizontal cylindrical furnace shells, the efficiency of loading and unloading can be improved, and the problem of inconvenience in loading and unloading at the inner end due to the long furnace shell can be avoided. In addition, opening both furnace doors can accelerate cooling.

[0019] 3. This utility model greatly improves the sealing between the furnace door and the furnace shell through the arrangement of the graphite soft felt layer and the embedded groove, and also greatly improves the heat preservation effect inside the furnace shell during the heating process;

[0020] 4. The utility model arranges the graphite heating element to be composed of an annular graphite block and graphite rods evenly distributed between the two annular graphite blocks, which not only facilitates the installation and fixation of the graphite heating element, but also the graphite heating element is distributed in an annular manner along the inner wall of the furnace shell, which greatly improves the uniformity of heating the material. There is a gap between adjacent graphite rods, which not only facilitates the fixation of the sagger, but also facilitates subsequent heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an overall schematic diagram of the utility model.

[0022] Figure 2 This is a schematic diagram of the furnace shell and graphite heating element of the utility model.

[0023] Figure 3 This is a schematic diagram of the furnace shell, graphite heating element and sagger of the utility model.

[0024] Figure 4 It is a schematic diagram of the furnace shell, furnace door body, first annular block, arc-shaped sleeve, second annular block and arc-shaped insert block of the utility model.

[0025] Figure 5 It is a schematic diagram of the furnace door body, the first annular block, the arc-shaped sleeve, the second annular block, the arc-shaped insert block, the graphite soft felt layer and the embedding groove of the utility model.

[0026] Figure 6 This is a schematic diagram of the arc-shaped plug-in block of the present invention.

[0027] Figure 7 It is a schematic diagram of the arc-shaped sleeve of the utility model.

[0028] Figure 8 It is a schematic diagram of the arc-shaped sleeve of the utility model.

[0029] Figure 9 It is an overall schematic diagram of the utility model.

[0030] Figure 10 This is a schematic diagram of the graphite heating element of the present invention.

[0031] In the figure: 1-support base, 2-furnace shell, 3-graphite heating element, 4-sagger, 5-furnace door, 6-furnace door body, 7-first annular block, 8-arc sleeve, 9-second annular block, 10-arc plug block, 11-annular block pushing mechanism, 12-fixed block, 13-arc plug block body, 14-support block, 15-fixed part, 16-extension part, 17-arc sleeve body, 18-graphite soft felt layer, 19-embedded groove, 20-connecting block, 21-push rod, 22-cylinder, 23-connecting rod, 24-connecting plate, 25-fixed rod, 26-annular connecting ring, 27-articular shaft connecting frame, 28-articular shaft, 29-furnace door connecting plate, 30-connecting piece, 31-threaded rod, 32-fixed seat, 33-nut, 34-annular graphite block, 35-graphite rod, 36-connecting column, 37-interlayer. DETAILED DESCRIPTION

[0032] The following is a combination of the appended examples of the present invention Figure 1-10 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] The utility model provides a technical solution: a cracking furnace, including a support base 1, a horizontal cylindrical furnace shell 2 is fixed on the support base 1, a graphite heating element 3 is provided in the furnace shell 2, a sagger 4 is provided in the graphite heating element 3, furnace doors 5 are hinged at both ends of the furnace shell 2, the furnace door 5 includes a furnace door body 6 and a first annular block 7 fixed on the inner side of the furnace door body 6, a plurality of arc sleeves 8 are fixed on the side wall of the first annular block 7, the end of the furnace shell 2 is rotatably connected to a second annular block 9, a plurality of arc plugs 10 are fixed on the side wall of the second annular block 9, and an annular block pushing mechanism 11 is provided on the second annular block 9. When the furnace door 5 needs to be locked, the furnace door 5 is closed first, that is, the two opposite surfaces of the first annular block 7 and the second annular block 9 coincide with each other. At this time, the arc sleeves 8 and the arc plugs 10 are staggered and located on the same annular surface, that is, one arc plug 10 corresponds to one arc sleeve 8, and then the annular When the door 5 is opened, the first and second annular blocks 7 and 9 are in the closed position, and the second annular block 9 is in the closed position, so that the door 5 is automatically locked. Furnace doors 5 are provided at both ends of the furnace shell 2, so that materials can be loaded or unloaded from both ends of the furnace shell 2 at the same time. For the horizontal cylindrical furnace shell 2, the efficiency of loading and unloading can be improved, and the situation where the inner end of the furnace shell 2 is inconvenient to load and unload due to the furnace shell 2 being too long will not occur. In addition, opening the two furnace doors 5 can accelerate cooling. The sagger 4 contains ceramic fibers or products, and the graphite heating element 3 is connected to a heating electrode to heat the sagger 4 and the materials inside the sagger 4. In addition, the cracking furnace also includes other necessary structures, such as a vacuum system, a control system, etc., which are not the focus of this patent and will not be described in detail here.

[0034] The arc-shaped plug 10 includes a fixing block 12 fixed on the side wall of the second annular block 9, and an arc-shaped plug body 13 matching the arc-shaped sleeve 8 is fixed on the fixing block 12. A gap is left between the bottom surface of the arc-shaped plug body 13 and the side wall of the second annular block 9. The arc-shaped sleeve 8 includes a support block 14 fixed on the side wall of the first annular block 7. The support block 14 includes a fixing part 15 fixed to the first annular block 7 and an extension part 16 extending toward the furnace shell 2. The upper surface of the extension part 16 is fixed with an arc-shaped sleeve body 17. The setting of the support block 14 greatly increases the fixing effect between the arc-shaped sleeve body 17 and the first annular block 7. Through the setting of the arc-shaped plug 10 and the arc-shaped sleeve 8 of this structure, the plug-in locking between the two is realized.

[0035] A layer of graphite soft felt layer 18 is fixed on the outer end face of the second annular block 9, and an embedding groove 19 is provided on the inner end face of the first annular block 7 for embedding the graphite soft felt layer 18, wherein the thickness of the graphite soft felt layer 18 can be slightly larger than the depth of the embedding groove 19. This arrangement greatly improves the sealing between the furnace door 5 and the furnace shell 2, and also greatly improves the heat preservation effect inside the furnace shell 2 during the heating process.

[0036] The annular block pushing mechanism 11 includes a connecting block 20 connected to the side wall of the second annular block 9, the connecting block 20 is hinged to one end of the push rod 21, the other end of the push rod 21 is fixed to the piston rod end of the cylinder 22, the tail end of the cylinder 22 is fixed with a connecting rod 23, the connecting rod 23 is fixed with a connecting plate 24, the connecting plate 24 is fixed with a fixing rod 25, and the fixing rod 25 is fixed to the furnace shell 2. The second annular block 9 can be rotated in both forward and reverse directions through this pneumatic structure.

[0037] There are two annular block pushing mechanisms 11 on the second annular block 9. The two annular block pushing mechanisms 11 are centrally symmetrical. The two annular block pushing mechanisms 11 are started simultaneously when locking and unlocking the furnace door 5, further improving the efficiency of locking and unlocking the furnace door 5.

[0038] An annular connecting ring 26 is fixed on the top wall of the plurality of arc-shaped inserting blocks 10 , and the setting of the connecting ring 26 strengthens the fixing effect of the arc-shaped inserting blocks 10 .

[0039] A hinge shaft connecting frame 27 is fixed on the furnace shell 2, a hinge shaft 28 is connected to the hinge shaft connecting frame 27, a furnace door connecting plate 29 is fixed on the hinge shaft 28, and two upper and lower connecting members 30 are fixed to the end of the furnace door connecting plate 29 away from the hinge shaft 28. The connecting member 30 is penetrated by a threaded rod 31, and the end of the threaded rod 31 close to the arc sleeve 8 is detachably connected to a fixing seat 32, and the fixing seat 32 is fixed on the furnace door body 6. The two sides of the connecting member 30 are locked by nuts 33. This arrangement greatly improves the stability of the furnace door 5.

[0040] The graphite heating element 3 includes two annular graphite blocks 34 fixed on the inner wall of the furnace shell 2. The two annular graphite blocks 34 are respectively arranged at the two ends close to the furnace shell 2. A number of graphite rods 35 are evenly distributed between the two annular graphite blocks 34. The graphite heating element 3 is set to this structure, which is not only convenient for installation and fixation, but also the graphite heating element 3 is distributed in an annular shape along the inner wall of the furnace shell 2, which greatly improves the uniformity of heating the material. There is a gap between adjacent graphite rods 35. This setting not only facilitates the fixation of the sagger 4, but also facilitates subsequent heat dissipation.

[0041] The sagger 4 is configured to be rectangular and is fixed to the inner wall of the furnace shell 2 via a plurality of connecting columns 36 . The sagger 4 is configured to be rectangular, which may be an inscribed rectangle, so that as much material as possible can be contained in the horizontal direction.

[0042] An interlayer 37 is provided in the furnace shell 2 , and cooling water flows through the interlayer 37 . This arrangement can effectively cool the furnace shell 2 and prevent the furnace shell 2 from being overheated.

[0043] Working principle: During operation, when the furnace door 5 needs to be locked, the furnace door 5 is closed first, that is, the two opposite surfaces of the first annular block 7 and the second annular block 9 coincide with each other. At this time, the arc sleeve 8 and the arc plug 10 are staggered and located on the same annular surface, that is, one arc plug 10 corresponds to one arc sleeve 8. Then the annular block pushing mechanism 11 is started to push the arc plug 10 on the second annular block 9 to rotate in the direction of the arc sleeve 8 until the arc plug 10 is inserted into the arc sleeve 8. In this way, the furnace door 5 is automatically locked. When the furnace door 5 needs to be opened, the annular pushing mechanism 11 is reversed. The first annular block 7 and the second annular block 9 rotate in the opposite direction, thereby causing the arc-shaped insert 10 on the second annular block 9 to disengage from the arc-shaped sleeve 8, thereby unlocking the furnace door 5. The present invention realizes automatic locking and unlocking of the furnace door 5 through the arrangement of the arc-shaped insert pushing mechanism 11, the first annular block 7, the arc-shaped sleeve 8, the second annular block 9, and the arc-shaped insert 10, greatly improving the efficiency of closing and opening the furnace door 5 and enhancing safety. The arrangement of the first annular block 7 and the second annular block 9 greatly increases the contact area between the furnace door 5 and the furnace shell 2 after the furnace door 5 covers the furnace shell 2, thereby improving the sealing performance of the furnace door 5. The furnace doors 5 are provided at both ends of the furnace shell 2, so that materials can be loaded or unloaded from both ends of the furnace shell 2 at the same time. For a horizontal cylindrical furnace shell 2, this improves the efficiency of loading and unloading, and also avoids the problem of inconvenience in loading and unloading at the inner end due to the long furnace shell 2. In addition, opening both furnace doors 5 can accelerate cooling.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cracking furnace, characterized in that: The invention comprises a support base (1), a horizontal cylindrical furnace shell (2) is fixed on the support base (1), a graphite heating element (3) is provided in the furnace shell (2), a sagger (4) is provided in the graphite heating element (3), furnace doors (5) are hinged at both ends of the furnace shell (2), the furnace door (5) comprises a furnace door body (6) and a first annular block (7) fixed on the inner side of the furnace door body (6), a plurality of arc-shaped sleeves (8) are fixed on the side wall of the first annular block (7), the end of the furnace shell (2) is rotatably connected to a second annular block (9), a plurality of arc-shaped plug blocks (10) are fixed on the side wall of the second annular block (9), and a ring block pushing mechanism (11) is provided on the second annular block (9).

2. A cracking furnace according to claim 1, characterized in that: The arc-shaped insert (10) includes a fixed block (12) fixed on the side wall of the second annular block (9), an arc-shaped insert body (13) matching the arc-shaped sleeve (8) is fixed on the fixed block (12), a gap is left between the bottom surface of the arc-shaped insert body (13) and the side wall of the second annular block (9), and the arc-shaped sleeve (8) includes a support block (14) fixed on the side wall of the first annular block (7), the support block (14) includes a fixed portion (15) fixed to the first annular block (7) and an extension portion (16) extending toward the furnace shell (2), and an arc-shaped sleeve body (17) is fixed on the upper surface of the extension portion (16).

3. A cracking furnace according to claim 1, characterized in that: A graphite soft felt layer (18) is fixed on the outer end surface of the second annular block (9), and an embedding groove (19) for embedding the graphite soft felt layer (18) is provided on the inner end surface of the first annular block (7).

4. A cracking furnace according to claim 1, characterized in that: The annular block pushing mechanism (11) comprises a connecting block (20) connected to the side wall of the second annular block (9), the connecting block (20) being hinged to one end of a push rod (21), the other end of the push rod (21) being fixed to the piston rod end of a cylinder (22), a connecting rod (23) being fixed to the tail end of the cylinder (22), a connecting rod (23) being fixed to a connecting plate (24), a fixing rod (25) being fixed to the connecting plate (24), and the fixing rod (25) being fixed to the furnace shell (2).

5. A cracking furnace according to claim 3, characterized in that: Two annular block pushing mechanisms (11) are provided on the second annular block (9), and the two annular block pushing mechanisms (11) are centrally symmetrical.

6. A cracking furnace according to claim 1, characterized in that: An annular connecting ring (26) is fixed on the top wall of the plurality of arc-shaped insert blocks (10).

7. A cracking furnace according to claim 1, characterized in that: A hinge shaft connecting frame (27) is fixed on the furnace shell (2), a hinge shaft (28) is connected to the hinge shaft connecting frame (27), a furnace door connecting plate (29) is fixed on the hinge shaft (28), and two upper and lower connecting members (30) are fixed to the end of the furnace door connecting plate (29) away from the hinge shaft (28), a threaded rod (31) is passed through the connecting member (30), and a fixing seat (32) is detachably connected to the end of the threaded rod (31) close to the arc sleeve (8), and the fixing seat (32) is fixed to the furnace door body (6), and both sides of the connecting member (30) are locked by nuts (33).

8. A cracking furnace according to claim 1, characterized in that: The graphite heating element (3) comprises two annular graphite blocks (34) fixed on the inner wall of the furnace shell (2), the two annular graphite blocks (34) are respectively arranged at two ends close to the furnace shell (2), and a plurality of graphite rods (35) are evenly distributed between the two annular graphite blocks (34).

9. A cracking furnace according to claim 7, characterized in that: The sagger (4) is configured to be rectangular and is fixed to the inner wall of the furnace shell (2) via a plurality of connecting columns (36).

10. A cracking furnace according to claim 1, characterized in that: An interlayer (37) is provided in the furnace shell (2), and cooling water flows through the interlayer (37).

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