A furnace neck structure for a cracking furnace

Abstract

This utility model provides a neck structure for a pyrolysis furnace, belonging to the field of pyrolysis furnace technology. The neck structure includes a neck and an interval replacement mechanism. An outer liner is installed on the outer side of the neck, and an inner liner is installed on the inner side. A replacement disc is fixedly connected to the bottom of the neck, and a replacement groove located on the underside of the outer liner is opened on the top of the replacement disc. A replacement head is fixedly connected to the bottom of the outer liner, and a mounting hole is opened on the outer side of the top of the replacement disc. A replacement locking mechanism is movably connected to the bottom of the outer side of the outer liner. By setting the interval replacement mechanism, the replacement connection between the inner and outer liners and the neck can be prevented from shifting, facilitating user replacement and maintenance operations. This avoids situations where the inner and outer liners are difficult to separate from the neck for replacement, increasing the cost of neck use, thus improving the convenience of neck replacement and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of pyrolysis furnace technology, and more specifically, to a neck structure for a pyrolysis furnace. Background Technology

[0002] The neck of a pyrolysis furnace is a crucial transitional component connecting the radiant and convection sections. It plays a pivotal role in the overall structure of the pyrolysis furnace, and its structural design directly impacts the furnace's thermal efficiency, material flow stability, and service life. During operation, high-temperature flue gas is generated from fuel combustion in the radiant section. This heat-carrying gas first enters the neck area. The neck uses an inner high-temperature resistant lining to block the high temperature, and an outer insulation layer to reduce heat loss, maintaining a stable flue gas temperature. Simultaneously, a flow guiding structure within the neck directs the flue gas evenly towards the convection section, providing heat for preheating the material in the convection section. During this process, a pyrolysis gas pipe running through the neck transports the high-temperature pyrolysis gas generated in the radiant section to subsequent processes. The flexible sealing structure between the pipe and the neck absorbs thermal expansion displacement, preventing leakage. Furthermore, a coke accumulation trough at the bottom of the neck collects a small amount of coke particles, ensuring smooth flow of flue gas and material. Ultimately, this achieves a seamless transition between efficient heat transfer and stable material transport. Since the functional liners on the inner and outer sides of the neck wear down with use, it is necessary to replace the inner and outer linings.

[0003] In related technologies, during the use of furnace neck, lightweight castable or ceramic materials are generally used to form inner and outer linings to surround, protect, and insulate the inner and outer sides of the furnace neck, thereby assisting the furnace neck to work better and thus enabling its use.

[0004] However, in the current use of furnace neck, since the inner and outer linings are directly installed on the outside of the furnace neck, when the inner and outer linings are worn out and need to be replaced, the entire furnace neck needs to be disassembled and replaced. This makes the replacement of the inner and outer linings of the furnace neck inconvenient, increases the cost of using the furnace neck, and affects the convenience of replacing and maintaining the furnace neck. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a neck structure for a pyrolysis furnace that overcomes or at least partially solves the above technical problems.

[0006] This utility model is implemented as follows: This utility model provides a neck structure for a pyrolysis furnace, including a neck, an outer liner installed on the outer side of the neck, and an inner liner installed on the inner side of the neck; Interval replacement mechanism; the interval replacement mechanism includes: Replacement tray; the replacement tray is fixedly connected to the bottom of the furnace neck, and the top of the replacement tray has a replacement groove located on the outer substrate; Replacement head; the replacement head is fixedly connected to the bottom of the outer liner, and the outer side of the top of the replacement disc is provided with a mounting hole; Replacement snap-fit ​​mechanism; the replacement snap-fit ​​mechanism is movably connected to the bottom of the outer side of the outer liner.

[0007] In a preferred embodiment, the replacement snap-fit ​​mechanism includes a snap-fit ​​ring, a snap-fit ​​cavity, and a snap-fit ​​block. The snap-fit ​​ring is movably connected to the bottom of the outer side of the outer liner, the snap-fit ​​cavity is opened at the bottom of the inner side of the snap-fit ​​ring, the snap-fit ​​block is movably connected to the inside of the snap-fit ​​cavity, and the inner side of the snap-fit ​​block is fixedly connected to the surface of the outer liner.

[0008] In a preferred embodiment, the top of the inner wall of the snap-fit ​​cavity is provided with a misalignment opening, which is located on the right side of the top of the snap-fit ​​block.

[0009] In a preferred embodiment, the top of the replacement disc is movably connected to a support seat located outside the snap ring, the support seat having a support groove on its inner side, and the snap ring being located inside the support groove.

[0010] In a preferred embodiment, a fixing seat is fixedly connected to the bottom of the outer side of the support base, and the fixing seat is internally threaded with a fixing bolt that is threadedly connected to the replacement disc.

[0011] In a preferred embodiment, positioning holes are provided on both sides of the top of the inner wall of the snap-fit ​​cavity, and positioning pins are movably connected inside the positioning holes.

[0012] In a preferred embodiment, positioning grooves are provided on both sides of the top of the replacement disc, and the bottom of the positioning post is located inside the positioning groove.

[0013] In a preferred embodiment, both sides of the snap-fit ​​cavity are movably connected to a limiting ring, and the inner side of the limiting ring is fixedly connected to the surface of the positioning post.

[0014] The present invention provides a neck structure for a pyrolysis furnace, the advantages of which include: 1. By setting up an interval replacement mechanism, the inner and outer linings can be replaced and connected to the furnace neck to prevent misalignment. This allows users to easily replace the inner and outer linings with the furnace neck, avoiding situations where it is difficult to replace the inner and outer linings and increasing the cost of using the furnace neck. Therefore, the convenience of replacing and maintaining the furnace neck is improved.

[0015] 2. By setting up a replacement snap-fit ​​mechanism, the snap-fit ​​between the outer lining and the furnace neck can be made stable. Since the top of the inner side of the outer lining is set in a collar-like manner, the outer lining and the inner lining are snapped and stabilized on the surface of the furnace neck, avoiding the situation that the inner and outer linings are easy to move up and down after replacement. Therefore, the stability of the replacement of the inner and outer linings is improved.

[0016] 3. By setting the misalignment port, the snap-fit ​​block can be provided with the space to move through the snap-fit ​​ring and detach from the snap-fit ​​cavity, avoiding the situation where the snap-fit ​​block is difficult to detach from the snap-fit ​​cavity during use, which would make it inconvenient to disassemble the outer liner. Therefore, the flexibility of snap-fit ​​block is improved. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is an overall perspective view provided by an embodiment of the present utility model; Figure 2 A left-side three-dimensional structural diagram of the replacement disc provided for an embodiment of this utility model; Figure 3 A schematic diagram of the three-dimensional cross-sectional structure of the furnace neck provided for an embodiment of this utility model; Figure 4 A left-side three-dimensional structural diagram of the snap-fit ​​ring provided for an embodiment of this utility model; In the diagram: 1. Furnace neck; 2. Outer lining; 3. Inner lining; 4. Replacement plate; 5. Replacement slot; 6. Replacement head; 7. Mounting hole; 8. Snap-fit ​​ring; 9. Snap-fit ​​cavity; 10. Snap-fit ​​block; 11. Misalignment opening; 12. Support base; 13. Support slot; 14. Fixing base; 15. Fixing bolt; 16. Positioning hole; 17. Positioning post; 18. Positioning slot; 19. Restriction ring. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Reference Figures 1-4This utility model provides a technical solution: a neck structure for a pyrolysis furnace, including a neck 1 and an interval replacement mechanism. An outer liner 2 is installed on the outer side of the neck 1, and an inner liner 3 is installed on the inner side of the neck 1. The inner liner 3 and the outer liner 2 can be replaced and connected to the neck 1 to prevent misalignment. This allows users to easily replace the inner liner 3 and the outer liner 2 with the neck 1, avoiding the situation where it is difficult to replace the inner liner 3 and the outer liner 2 during use, which would increase the cost of using the neck 1. Therefore, the convenience of replacing and maintaining the neck 1 is improved.

[0021] Reference Figures 1-4 In a preferred embodiment, the interval replacement mechanism includes a replacement disc 4, which is fixedly connected to the bottom of the furnace neck 1. The top of the replacement disc 4 has a replacement groove 5 located at the bottom of the outer lining 2. A replacement head 6 is fixedly connected to the bottom of the outer lining 2. An installation hole 7 is provided on the outer side of the top of the replacement disc 4. A replacement locking mechanism is movably connected to the bottom of the outer side of the outer lining 2. The inner lining 3 is moved to the inner side of the furnace neck 1, and then the outer lining 2 is moved and fitted onto the outer side of the furnace neck 1. Because the top of the inner side of the outer lining 2 is a collar-like structure, it can restrict the movement between the inner lining 3 and the furnace neck 1. At this time, the replacement head 6 follows the outer lining 2 into the replacement groove 5 and passes through the replacement disc 4 to replace the outer lining 2 with the inner lining. The replacement connection between the outer liner 2 and the furnace neck 1 is designed to prevent displacement. The replacement snap-fit ​​mechanism includes a snap-fit ​​ring 8, a snap-fit ​​cavity 9, and a snap-fit ​​block 10. The snap-fit ​​ring 8 is movably connected to the bottom of the outer side of the outer liner 2. The snap-fit ​​cavity 9 is located at the bottom of the inner side of the snap-fit ​​ring 8. The snap-fit ​​block 10 is movably connected inside the snap-fit ​​cavity 9. The inner side of the snap-fit ​​block 10 is fixedly connected to the surface of the outer liner 2, which can stabilize the snap-fit ​​between the outer liner 2 and the furnace neck 1. Since the top of the inner side of the outer liner 2 is set in a collar-like manner, the outer liner 2 and the inner liner 3 are stably snapped onto the surface of the furnace neck 1, avoiding the situation where the inner liner 3 and the outer liner 2 are easily moved up and down after replacement. Therefore, the stability of the replacement of the inner liner 3 and the outer liner 2 is improved.

[0022] Reference Figures 2-4 In a preferred embodiment, by providing a misalignment opening 11 at the top of the inner wall of the snap-fit ​​cavity 9, and the misalignment opening 11 being located on the right side of the top of the snap-fit ​​block 10, the snap-fit ​​block 10 can be provided with a space for the snap-fit ​​ring 8 to detach from the snap-fit ​​cavity 9. This avoids the snap-fit ​​block 10 being difficult to detach from the snap-fit ​​cavity 9 during use, which would make it inconvenient to disassemble the outer liner 2. Therefore, the flexibility of the snap-fit ​​block 10 is improved. The top of the replacement disc 4 is movably connected to a support seat 12 located outside the snap-fit ​​ring 8. A support groove 13 is provided on the inner side of the support seat 12. The snap-fit ​​ring 8 is located inside the support groove 13. This allows for a rotating connection between the snap-fit ​​ring 8 and the replacement disc 4 to prevent displacement. This avoids the snap-fit ​​ring 8 being difficult to maintain its position during operation, which would make it difficult for the snap-fit ​​ring 8 to work properly. Therefore, the stability of the snap-fit ​​ring 8 is improved.

[0023] Reference Figures 2-4 In a preferred embodiment, a fixing seat 14 is fixedly connected to the bottom of the outer side of the support seat 12. The fixing seat 14 is internally threaded with a fixing bolt 15 that is threadedly connected to the replacement disc 4. This can connect and fix the support seat 12 and the replacement disc 4, preventing the support seat 12 from separating from the replacement disc 4 during use. This improves the working stability of the support seat 12. Positioning holes 16 are provided on both sides of the top of the inner wall of the snap-fit ​​cavity 9. Positioning pins 17 are movably connected inside the positioning holes 16. This can perform insertion and positioning work between the snap-fit ​​ring 8 and the replacement disc 4 during operation, preventing the snap-fit ​​ring 8 from being difficult to position during use. This improves the positioning convenience of the snap-fit ​​ring 8.

[0024] Reference Figures 2-4 In a preferred embodiment, by providing positioning grooves 18 on both sides of the top of the replacement disc 4, and with the bottom of the positioning post 17 located inside the positioning groove 18, a insertion positioning space can be provided for the positioning post 17, avoiding the situation where the positioning post 17 is difficult to effectively insert and position the locking ring 8 during operation. Therefore, the insertion positioning effect of the positioning post 17 is improved. Both sides inside the locking cavity 9 are movably connected with limiting rings 19. The inner side of the limiting ring 19 is fixedly connected to the surface of the positioning post 17, which can limit the lifting and lowering of the positioning post 17 and the positioning hole 16 to prevent separation. This prevents the positioning post 17 from rising and separating from the positioning hole 16 during use, thus improving the connection effect between the positioning post 17 and the positioning hole 16.

[0025] Specifically, the working process or principle of this type of pyrolysis furnace neck structure is as follows: In use, first, hold the inner lining 3 and move it to the inside of the neck 1. At this time, the top of the replacement plate 4 contacts the bottom of the inner lining 3, providing support between the neck 1 and the inner lining 3. Then, hold the outer lining 2 and move the locking block 10, so that the locking block 10 moves with the outer lining 2 and aligns with the misalignment opening 11, preparing for the locking block 10 to enter the locking cavity 9 through the misalignment opening 11. Subsequently, hold the outer lining 2 and move it to... Located on the outside of the furnace neck 1, the replacement head 6 moves with the outer lining 2 into the replacement groove 5 and passes through the replacement disc 4 to perform replacement and anti-displacement work between the outer lining 2 and the furnace neck 1. Since the top of the inner side of the outer lining 2 is a collar-like structure, as the outer lining 2 moves, it fits onto the outside of the furnace neck 1, restricting the connection between the outer lining 2 and the inner lining 3. Simultaneously, the locking block 10 moves with the outer lining 2, passing through the misalignment opening 11 and entering the locking cavity 9. Then, by holding the locking ring 8 and rotating it to the right, the locking block 10... The snap-fit ​​block 10 moves inside the snap-fit ​​cavity 9 and is misaligned with the misalignment opening 11, causing the snap-fit ​​block 10 to cooperate with the snap-fit ​​cavity 9 and the snap-fit ​​ring 8 to perform a stable snap-fit ​​operation between the outer liner 2 and the replacement disc 4. During this process, the support base 12 cooperates with the support groove 13 to provide rotational support connection between the snap-fit ​​ring 8 and the replacement disc 4. At this time, the fixing base 14 cooperates with the fixing bolt 15 to connect and fasten the support base 12 and the replacement disc 4. Simultaneously, the positioning pin 17 follows the snap-fit ​​ring 8 through the positioning hole 16 during the replacement process. When the top of the plate 4 moves, the positioning post 17 moves to the top of the positioning groove 18. Under the influence of its own gravity, the positioning post 17 moves downward and enters the positioning groove 18. The positioning post 17, through the positioning groove 18 and the positioning hole 16, performs the insertion and positioning work between the snap ring 8 and the replacement plate 4 after the operation. Then, the snap ring 8, through the snap cavity 9 and the snap block 10, performs the snap-fit ​​and stable work between the replaced outer lining 2 and the furnace neck 1, ensuring the connection effect between the replaced outer lining 2 and the inner lining 3 and the furnace neck 1.

[0026] It should be noted that the neck 1, outer lining 2 and inner lining 3 are all existing devices or equipment, or devices or equipment that can be implemented with existing technology. Their power supply, specific composition and principle are clear to those skilled in the art, so they will not be described in detail.

Claims

1. A neck structure for a pyrolysis furnace, comprising a neck (1), wherein an outer liner (2) is installed on the outer side of the neck (1), and an inner liner (3) is installed on the inner side of the neck (1), characterized in that... ； Interval replacement mechanism; the interval replacement mechanism includes: Replacement plate (4); The replacement plate (4) is fixedly connected to the bottom of the furnace neck (1), and the top of the replacement plate (4) is provided with a replacement groove (5) located at the bottom of the outer lining (2); Replacement head (6); the replacement head (6) is fixedly connected to the bottom of the outer liner (2), and the outer side of the top of the replacement disc (4) is provided with a mounting hole (7); Replacement snap-fit ​​mechanism; the replacement snap-fit ​​mechanism is movably connected to the bottom of the outer side of the outer liner (2).

2. The neck structure for a pyrolysis furnace according to claim 1, characterized in that, The replacement snap-fit ​​mechanism includes a snap-fit ​​ring (8), a snap-fit ​​cavity (9), and a snap-fit ​​block (10). The snap-fit ​​ring (8) is movably connected to the bottom of the outer side of the outer liner (2). The snap-fit ​​cavity (9) is opened at the bottom of the inner side of the snap-fit ​​ring (8). The snap-fit ​​block (10) is movably connected inside the snap-fit ​​cavity (9). The inner side of the snap-fit ​​block (10) is fixedly connected to the surface of the outer liner (2).

3. The neck structure for a pyrolysis furnace according to claim 2, characterized in that, The top of the inner wall of the snap-fit ​​cavity (9) is provided with a misalignment opening (11), which is located on the right side of the top of the snap-fit ​​block (10).

4. The neck structure for a pyrolysis furnace according to claim 2, characterized in that, The top of the replacement disc (4) is movably connected to a support seat (12) located outside the snap ring (8). The support seat (12) has a support groove (13) on its inner side, and the snap ring (8) is located inside the support groove (13).

5. The neck structure for a pyrolysis furnace according to claim 4, characterized in that, The bottom of the outer side of the support base (12) is fixedly connected to a fixing base (14), and the fixing base (14) is internally threaded with a fixing bolt (15) that is threadedly connected to the replacement disc (4).

6. The neck structure for a pyrolysis furnace according to claim 2, characterized in that, Positioning holes (16) are provided on both sides of the top of the inner wall of the snap-fit ​​cavity (9), and positioning pins (17) are movably connected inside the positioning holes (16).

7. The neck structure for a pyrolysis furnace according to claim 6, characterized in that, The top of the replacement disc (4) is provided with positioning grooves (18) on both sides, and the bottom of the positioning post (17) is located inside the positioning groove (18).

8. The neck structure for a pyrolysis furnace according to claim 6, characterized in that, Both sides of the snap-fit ​​cavity (9) are movably connected to a limiting ring (19), and the inner side of the limiting ring (19) is fixedly connected to the surface of the positioning post (17).

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