Annealing guard assembly for a bottle making line

Abstract

The utility model discloses an annealing protection subassembly of bottle making assembly line, including right protection subassembly and parallelly arranged left protection subassembly in right protection subassembly left side, left protection subassembly and right protection subassembly are protected respectively in annealing furnace conveying feed port left and right sides, the both ends of right protection subassembly are all vertically fixed with vertical mounting support A, the both ends of left protection subassembly are all vertically fixed with vertical mounting support B, through increasing novel annealing before conveying correction device between left and right protection subassembly of the annealing protection subassembly of bottle making assembly line, the device carries out secondary position calibration to the bottle of conveying belt top end through correction track strip A and correction track strip B, can effectively offset the displacement deviation of bottle after primary correction, before entering annealing furnace, because of the displacement deviation of external force impact or equipment vibration, ensure that bottle enters annealing furnace with accurate central posture, avoid the problem of in -furnace collision, broken because of position deviation from the source, significantly reduce production loss.

Description

Technical Field

[0001] This utility model belongs to the technical field of glass manufacturing, specifically relating to an annealing protection component for a bottle-making production line. Background Technology

[0002] In the bottle-making production line, the annealing furnace is a key piece of equipment for eliminating glass bottle forming stress and ensuring bottle strength. The annealing protection component is a core auxiliary structure set around the annealing furnace feed inlet, mainly responsible for high-temperature isolation, personnel safety protection, and bottle conveying guidance. Through symmetrical protective plates, support brackets, and top connecting structures, it achieves all-round protection of the annealing furnace feed inlet, while providing a basic guarantee for the stable entry of the bottle into the annealing furnace. It is an important component to ensure smooth annealing process and reduce production losses.

[0003] However, while existing components can achieve high-temperature isolation and basic protection at the annealing furnace inlet, they have deficiencies in controlling the accuracy of bottle conveying. Although most production lines have a position correction device set up at the initial stage of the bottle entering the conveyor belt to ensure that the bottle is initially aligned with the center of the conveyor belt, during the further conveying of the bottle from the initially corrected position to the annealing furnace inlet, the bottle still has a high probability of lateral displacement due to external forces such as vibration of the production line equipment, slight collisions between adjacent bottles, or local deviations in the operation of the conveyor belt. This causes the bottle to deviate from the center track of the conveyor belt. On the other hand, existing protective components lack effective countermeasures for this type of secondary displacement. After the deviated bottle enters the annealing furnace, it is easy to collide with the conveyor track and other bottles in the furnace. This can not only cause the bottle to break and increase production losses, but may also cause the production line to stop due to broken glass jamming the equipment, affecting production efficiency. At the same time, broken bottles can also cause potential damage to the internal structure of the annealing furnace, increasing equipment maintenance costs. Utility Model Content

[0004] The purpose of this utility model is to provide an annealing protection component for a bottle-making production line, in order to solve the problem that the existing protection components mentioned in the background art lack an effective response structure for this type of secondary displacement. After the displaced bottles enter the annealing furnace, they are prone to collision with the conveyor track and other bottles in the furnace, which not only causes the bottles to break and increases production losses, but may also cause the production line to stop due to broken glass jamming the equipment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an annealing protection component for a bottle-making production line, comprising a right protection component and a left protection component arranged parallel to the left side of the right protection component. The left and right protection components respectively protect the left and right sides of the annealing furnace feed inlet. Vertical mounting brackets A are vertically fixed at both ends of the right protection component, and vertical mounting brackets B are vertically fixed at both ends of the left protection component. A reinforcing top frame A is fixedly connected between the top ends of the two vertical mounting brackets A, and a reinforcing top frame B is fixedly connected between the top ends of the two vertical mounting brackets B. Multiple top connecting frames are fixedly connected at equal intervals between the reinforcing top frames A and B. A pre-annealing conveying correction device is connected to the top connecting frame between the front and rear ends of the reinforcing top frames A and B.

[0006] Preferably, the pre-annealing conveying and correction device includes a metal adjusting sleeve A and a metal adjusting sleeve B. The metal adjusting sleeve A and the metal adjusting sleeve B are respectively sleeved on the outside of the top connecting frame between the front and rear ends of the reinforcing top frame A and the reinforcing top frame B, and the metal adjusting sleeve A and the metal adjusting sleeve B are respectively located on the left and right sides of the center of the top connecting frame.

[0007] Preferably, the pre-annealing conveying and correction device further includes internally threaded metal sleeves and position fixing screws. Internally threaded metal sleeves are inserted and fixed on both sides of the center of the top of the two metal adjusting sleeves A and the two metal adjusting sleeves B. Position fixing screws are threaded into each of the multiple internally threaded metal sleeves.

[0008] Preferably, after the position fixing screw is loosened, both metal adjusting sleeve A and metal adjusting sleeve B can move left and right outside the top connecting frame. After the position fixing screw is tightened, the bottom end of the screw rod can press tightly against the outer wall of the top of the top connecting frame to prevent metal adjusting sleeve A and metal adjusting sleeve B from moving left and right.

[0009] Preferably, the pre-annealing conveying and correction device further includes a correction track plate A, a metal hanger A, a metal hanger B, a correction track plate B, and a hanger reinforcement rod. A metal hanger A is vertically welded to the center of the bottom end of each of the two metal adjustment sleeves A, and a metal hanger B is vertically welded to the center of the bottom end of each of the two metal adjustment sleeves B. A correction track plate A is fixedly connected to the bottom end of each of the two metal hangers A and B, and a hanger reinforcement rod is fixedly connected between the center and the upper side of each of the two metal hangers A and B.

[0010] Preferably, the corrective track plate A and the corrective track plate B are parallel to each other, and the corrective track plate A and the corrective track plate B are located on the left and right sides of the center of the top of the annealing furnace conveyor belt, respectively. The corrective track plate A and the corrective track plate B are both located in front of the annealing furnace feed inlet, and neither the corrective track plate A nor the corrective track plate B is in contact with the annealing furnace conveyor belt.

[0011] Preferably, the pre-annealing conveying correction device further includes an arc-shaped guide plate A and an arc-shaped guide plate B. The front end of the correction track plate A is fixedly connected to the arc-shaped guide plate A, which is set to extend arc-shaped to the right. The front end of the correction track plate B is fixedly connected to the arc-shaped guide plate B, which is set to extend arc-shaped to the left.

[0012] Preferably, both the bottom ends of the vertical mounting bracket A and the bottom ends of the vertical mounting bracket B are welded with mounting base plates, and screw fixing holes are reserved inside the multiple mounting base plates near the four corners. A reinforcing base frame is fixedly connected between the two vertical mounting brackets A and the two vertical mounting brackets B near the bottom ends.

[0013] Preferably, the right protective component includes a flame-retardant and heat-insulating protective plate A and a protective plate mounting frame A. The protective plate mounting frame A is fixedly connected between two vertical mounting brackets A by multiple screws. Multiple flame-retardant and heat-insulating protective plates A are fixed inside the frame of the protective plate mounting frame A. The multiple flame-retardant and heat-insulating protective plates A are attached to each other and the multiple flame-retardant and heat-insulating protective plates A protect the right side of the annealing furnace feed inlet.

[0014] Preferably, the left protective component includes a protective plate mounting frame B and a flame-retardant and heat-insulating protective plate B. The protective plate mounting frame B is fixedly connected between two vertical mounting brackets B by multiple screws. Multiple flame-retardant and heat-insulating protective plates B are fixed inside the frame of the protective plate mounting frame B. The multiple flame-retardant and heat-insulating protective plates B are attached to each other and protect the left side of the annealing furnace feed inlet.

[0015] Compared with the prior art, this utility model provides an annealing protection component for a bottle-making production line, which has the following beneficial effects:

[0016] This invention adds a novel pre-annealing conveyor correction device between the left and right protective components of the annealing protection assembly in the bottle-making production line. This device performs secondary position calibration on the bottles at the top of the conveyor belt through correction track plates A and B. This effectively offsets the displacement deviation caused by external force collisions or equipment vibrations after the initial correction and before entering the annealing furnace, ensuring that the bottles enter the annealing furnace in a precisely centered position. This avoids furnace collisions and breakage caused by positional deviations from the source, significantly reducing production losses. Furthermore, the arc-shaped guide plates A and B of the device form an outward-expanding guide inlet structure, which can guide and straighten the bottles at the front end of the conveyor belt in advance, preventing congestion and skew before the bottles enter the correction track plates. This ensures smooth and continuous subsequent correction processes and improves overall conveying efficiency.

[0017] Furthermore, the metal adjusting sleeves A and B of this device can be adjusted left and right on the top connecting frame by loosening or tightening the position fixing screws, thereby adjusting the distance between the correction track plate A and the correction track plate B. This design can flexibly adapt to glass bottles of different diameters without replacing the entire device, reducing equipment adaptation costs and improving the device's versatility. The device is integrated between the reinforced top frame of the left and right protective components. During the correction process, it can work with the flame-retardant and heat-insulating protective plate to isolate the high temperature at the annealing furnace inlet, preventing the bottle from experiencing localized stress changes due to high temperatures during the correction stage. At the same time, it prevents operators from coming into contact with high-temperature areas, further improving the safety protection level of the production line. Attached Figure Description

[0018] Figure 1 This is a front-view three-dimensional structural diagram of an annealing protection component for a bottle-making production line according to the present invention.

[0019] Figure 2 This is a top view schematic diagram of the annealing protection component of a bottle-making production line according to the present invention.

[0020] Figure 3 This is a front-view three-dimensional structural diagram of the pre-annealing conveying and correction device of this utility model.

[0021] Figure 4 This is a right-side plan view of the pre-annealing conveying and correction device of this utility model.

[0022] In the diagram: 1. Reinforced top frame A; 2. Flame-retardant and heat-insulating protective plate A; 3. Protective plate mounting frame A; 4. Reinforced base frame; 5. Vertical mounting bracket A; 6. Mounting base plate; 7. Vertical mounting bracket B; 8. Protective plate mounting frame B; 9. Flame-retardant and heat-insulating protective plate B; 10. Reinforced top frame B; 11. Top connecting frame; 12. Pre-annealing conveying and correction device; 13. Correction track plate A; 14. Metal adjusting sleeve A; 15. Metal hanger A; 16. Arc-shaped guide plate A; 17. Arc-shaped guide plate B; 18. Metal hanger B; 19. Metal adjusting sleeve B; 20. Hanger reinforcing rod; 21. Correction track plate B; 22. Internally threaded metal sleeve; 23. Position fixing screw. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model provides, for example Figure 1-4 The annealing protection assembly shown is for a bottle-making production line. It includes a right protection assembly and a left protection assembly parallel to the left side of the right protection assembly. The left and right protection assemblies respectively protect the left and right sides of the annealing furnace feed inlet. This symmetrical arrangement provides double protection from both sides, preventing high-temperature overflow from the annealing furnace feed inlet and preventing external debris from entering the furnace and affecting the annealing effect. It also provides safety isolation for operators, reducing the risk of burns. Vertical mounting brackets A5 are vertically fixed to both ends of the right protection assembly, and vertical mounting brackets B7 are vertically fixed to both ends of the left protection assembly. Vertical mounting brackets A5 and B7 serve as the core support structure. The vertical fixing design ensures the stability of the overall components and prevents the protective components from shifting due to equipment vibration. A reinforcing top frame A1 is fixedly connected between the tops of the two vertical mounting brackets A5, and a reinforcing top frame B10 is fixedly connected between the tops of the two vertical mounting brackets B7. The reinforcing top frame A1 and the reinforcing top frame B10 can enhance the structural strength of the top of the brackets and prevent the brackets from deforming due to the force on the top. Multiple top connecting frames 11 are fixedly connected at equal intervals between the reinforcing top frame A1 and the reinforcing top frame B10. The equidistantly distributed top connecting frames 11 can evenly distribute the force and at the same time provide a stable installation foundation for the subsequent installation of the pre-annealing conveying correction device 12, ensuring that the correction device does not shake during operation.

[0025] like Figure 1 and Figure 2As shown, mounting base plates 6 are welded to the bottom of both vertical mounting bracket A5 and vertical mounting bracket B7. Each mounting base plate 6 has pre-drilled screw holes near its four corners. By engaging the mounting base plates 6 with the screw holes, the entire protective assembly can be securely fixed to the ground or the assembly line frame, preventing displacement during assembly line operation. Reinforcing base frames 4 are fixedly connected between the bottom ends of both vertical mounting brackets A5 and B7. These reinforcing base frames 4 enhance the connection stability at the bottom of the brackets, forming a double-reinforced structure with a top reinforcing frame and a bottom reinforcing base frame 4, further improving the overall vibration resistance of the assembly. The protective assembly includes a flame-retardant and heat-insulating protective plate A2 and a protective plate mounting frame A3. The protective plate mounting frame A3 is fixedly connected between the two vertical mounting brackets A5 using multiple screws. This screw fixing method facilitates the subsequent disassembly and replacement of the protective plate, reducing maintenance difficulty. Multiple flame-retardant and heat-insulating protective plates A2 are fixed inside the frame of the protective plate mounting frame A3. Multiple flame-retardant and heat-insulating protective plates A2 are bonded together, and the bonded design avoids heat insulation gaps, ensuring heat insulation effect. The multiple flame-retardant and heat-insulating protective plates A2 protect the right side of the annealing furnace inlet, effectively isolating the high temperature of 500-600℃ inside the annealing furnace, preventing the high temperature from spreading and affecting surrounding equipment or burning operators. The left protective component includes a protective plate mounting frame B8 and flame-retardant and heat-insulating protective plates B9. The protective plate mounting frame B8 is fixed between two vertical mounting brackets B7 by multiple screws, which also ensures convenient installation and maintenance. Multiple flame-retardant and heat-insulating protective plates B9 are fixed inside the frame of the protective plate mounting frame B8. The multiple flame-retardant and heat-insulating protective plates B9 are bonded together, also avoiding heat insulation gaps. The multiple flame-retardant and heat-insulating protective plates B9 protect the left side of the annealing furnace inlet, forming a symmetrical high-temperature isolation structure with the flame-retardant and heat-insulating protective plates A2 of the right protective component, fully covering both sides of the annealing furnace inlet, maximizing the heat insulation and safety protection effect.

[0026] like Figure 1 , Figure 3 and Figure 4As shown, a pre-annealing conveying correction device 12 is connected to the top connecting frame 11 between the front and rear ends of the reinforcing top frame A1 and the reinforcing top frame B10. The core principle of this device is to perform secondary position calibration on the bottles conveyed on the conveyor belt through an adjustable track structure, solving the displacement problem caused by external force or vibration after the initial correction of the bottles. The pre-annealing conveying correction device 12 includes a metal adjusting sleeve A14 and a metal adjusting sleeve B19. The metal adjusting sleeves A14 and B19 are respectively sleeved on the outside of the top connecting frame 11 between the front and rear ends of the reinforcing top frame A1 and the reinforcing top frame B10. The metal adjusting sleeves A14 and B19 are located on the left and right sides of the center of the top connecting frame 11, respectively. The sleeve design allows the adjusting sleeves to slide along the top connecting frame 11, providing a basis for subsequent adjustment and correction of the track spacing. The pre-annealing conveying correction device 12 also includes internally threaded metal... The top center of each of the two metal adjusting sleeves A14 and B19 is fixed with an internally threaded metal sleeve 22 inserted into both sides. Each of the internally threaded metal sleeves 22 has a position fixing screw 23 threaded into it. The internally threaded metal sleeves 22 and the position fixing screws 23 cooperate to form an adjustable fixing structure. The working principle is as follows: when the position fixing screw 23 is loosened, both the metal adjusting sleeves A14 and B19 can move left and right outside the top connecting frame 11, facilitating position adjustment according to the bottle diameter. When the position fixing screw 23 is tightened, the bottom end of the screw can press tightly against the outer wall of the top of the top connecting frame 11, preventing the metal adjusting sleeves A14 and B19 from moving left and right through friction, ensuring stable correction track position. The advantage of this design is its ease of operation; it can be adjusted without disassembly and is suitable for bottles of different sizes.

[0027] like Figure 1 , Figure 3 and Figure 4As shown, the pre-annealing conveying and correction device 12 also includes a correction track plate A13, metal hangers A15, metal hangers B18, a correction track plate B21, and hanger reinforcing rods 20. Metal hangers A15 are vertically welded to the center of the bottom ends of both metal adjusting sleeves A14, and metal hangers B18 are vertically welded to the center of the bottom ends of both metal adjusting sleeves B19. Vertical welding ensures the connection strength between the hangers and the adjusting sleeves, preventing breakage during operation. Correction track plates A13 are fixedly connected to the bottom ends of both metal hangers A15, and correction track plates B21 are fixedly connected to the bottom ends of both metal hangers B18. The function of the hangers is to hold the correction track plate... The plate is precisely suspended above the conveyor belt, and the correction track plate A13 and correction track plate B21 are parallel to each other. Correction track plate A13 and correction track plate B21 are located on the left and right sides of the center of the top of the annealing furnace conveyor belt, respectively. The parallel arrangement can ensure that the left and right limits of the bottle are uniform, and avoid the bottle being deviated by force on one side. In addition, correction track plate A13 and correction track plate B21 are both located in front of the annealing furnace inlet, so that the position can be corrected before the bottle enters the annealing furnace. At the same time, correction track plate A13 and correction track plate B21 do not contact the annealing furnace conveyor belt, avoiding contact friction that could cause wear on the conveyor belt or affect the conveying speed.

[0028] like Figure 1 , Figure 3 and Figure 4 As shown, two metal hangers A15 and two metal hangers B18 are fixedly connected to the center and upper side of each other with hanger reinforcement rods 20. The reinforcement rods enhance the structural strength of the hangers through the principle of triangular stability, prevent the hangers from deforming due to vibration, ensure the stability of the correction track plate position, and improve the correction accuracy. The pre-annealing conveying correction device 12 also includes an arc-shaped guide plate A16 and an arc-shaped guide plate B17. The front end of the correction track plate A13 is fixedly connected to the arc-shaped guide plate A16, which is set to extend arc-shaped to the right. The front end of the correction track plate B21 is fixedly connected to the arc-shaped guide plate B17, which is set to extend arc-shaped to the left. The advantage of the arc design is that it can form an outward-expanding guide inlet structure. Its principle is to slowly guide the tilted bottle into the correction track plate through the arc surface, avoiding the bottle directly hitting the track plate and causing damage, while preventing the bottle from congesting at the inlet and improving the smoothness of the conveying.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An annealing protection assembly for a bottle-making production line, comprising a right protection assembly and a left protection assembly arranged parallel to the left side of the right protection assembly, wherein the left and right protection assemblies respectively protect the left and right sides of the annealing furnace feed inlet, wherein the right protection assembly is vertically fixed with vertical mounting brackets A (5) at both ends, and the left protection assembly is vertically fixed with vertical mounting brackets B (7) at both ends, wherein a reinforcing top bracket A (1) is fixedly connected between the top ends of the two vertical mounting brackets A (5), and a reinforcing top bracket B (10) is fixedly connected between the top ends of the two vertical mounting brackets B (7), wherein a plurality of top connecting brackets (11) are fixedly connected at equal intervals between the reinforcing top brackets A (1) and the reinforcing top brackets B (10), characterized in that: The top connecting frame (11) between the front and rear ends of the reinforcing top frame A (1) and the reinforcing top frame B (10) is connected to a pre-annealing conveying and correction device (12); The pre-annealing conveying correction device (12) includes a metal adjusting sleeve A (14) and a metal adjusting sleeve B (19). The metal adjusting sleeve A (14) and the metal adjusting sleeve B (19) are respectively sleeved on the outside of the top connecting frame (11) between the front and rear ends of the reinforcing top frame A (1) and the reinforcing top frame B (10), and the metal adjusting sleeve A (14) and the metal adjusting sleeve B (19) are located on the left and right sides of the center of the top connecting frame (11).

2. The annealing protection component for a bottle-making production line according to claim 1, characterized in that: The pre-annealing conveying correction device (12) further includes an internally threaded metal sleeve (22) and a position fixing screw (23). The two metal adjusting sleeves A (14) and the two metal adjusting sleeves B (19) are all fixed with internally threaded metal sleeves (22) on the left and right sides of the top center. The multiple internally threaded metal sleeves (22) are all threaded with position fixing screws (23).

3. The annealing protection component for a bottle-making production line according to claim 2, characterized in that: After the position fixing screw (23) is loosened, both the metal adjusting sleeve A (14) and the metal adjusting sleeve B (19) can move left and right outside the top connecting frame (11). After the position fixing screw (23) is tightened, the bottom end of the screw rod can press against the outer wall of the top of the top connecting frame (11) to prevent the metal adjusting sleeve A (14) and the metal adjusting sleeve B (19) from moving left and right.

4. The annealing protection component for a bottle-making production line according to claim 3, characterized in that: The pre-annealing conveying correction device (12) further includes a correction track plate A (13), a metal hanger A (15), a metal hanger B (18), a correction track plate B (21), and a hanger reinforcement rod (20). The metal hanger A (15) is vertically welded to the center of the bottom end of each of the two metal adjustment sleeves A (14). The metal hanger B (18) is vertically welded to the center of the bottom end of each of the two metal adjustment sleeves B (19). The correction track plate A (13) is fixedly connected to the bottom end of each of the two metal hangers A (15). The correction track plate B (21) is fixedly connected to the bottom end of each of the two metal hangers B (18). The hanger reinforcement rod (20) is fixedly connected between the center and the upper side of each of the two metal hangers A (15) and the two metal hangers B (18).

5. The annealing protection component for a bottle-making production line according to claim 4, characterized in that: The corrected track plate A (13) and the corrected track plate B (21) are parallel to each other. The corrected track plate A (13) and the corrected track plate B (21) are located on the left and right sides of the center of the top of the annealing furnace conveyor belt, respectively. The corrected track plate A (13) and the corrected track plate B (21) are both located in front of the annealing furnace feed inlet. At the same time, the corrected track plate A (13) and the corrected track plate B (21) do not contact the annealing furnace conveyor belt.

6. The annealing protection component for a bottle-making production line according to claim 5, characterized in that: The pre-annealing conveying correction device (12) further includes an arc-shaped guide plate A (16) and an arc-shaped guide plate B (17). The front end of the correction track plate A (13) is fixedly connected to the arc-shaped guide plate A (16), which is set in an arc-shaped extension state to the right front. The front end of the correction track plate B (21) is fixedly connected to the arc-shaped guide plate B (17), which is set in an arc-shaped extension state to the left front.

7. The annealing protection component for a bottle-making production line according to claim 1, characterized in that: The bottom ends of the vertical mounting bracket A (5) and the bottom ends of the vertical mounting bracket B (7) are all welded with mounting base plates (6), and screw fixing holes are reserved inside the multiple mounting base plates (6) near the four corners. A reinforcing base frame (4) is fixedly connected between the two vertical mounting brackets A (5) and the two vertical mounting brackets B (7) near the bottom ends.

8. The annealing protection component for a bottle-making production line according to claim 1, characterized in that: The right protective component includes a flame-retardant and heat-insulating protective plate A (2) and a protective plate mounting frame A (3). The protective plate mounting frame A (3) is fixedly connected between two vertical mounting brackets A (5) by multiple screws. Multiple flame-retardant and heat-insulating protective plates A (2) are fixed inside the frame of the protective plate mounting frame A (3). The multiple flame-retardant and heat-insulating protective plates A (2) are attached to each other, and the multiple flame-retardant and heat-insulating protective plates A (2) protect the right side of the annealing furnace feed inlet.

9. The annealing protection component for a bottle-making production line according to claim 8, characterized in that: The left protective component includes a protective plate mounting frame B (8) and a flame-retardant and heat-insulating protective plate B (9). The protective plate mounting frame B (8) is fixedly connected between two vertical mounting brackets B (7) by multiple screws. Multiple flame-retardant and heat-insulating protective plates B (9) are fixed inside the frame of the protective plate mounting frame B (8). The multiple flame-retardant and heat-insulating protective plates B (9) are attached to each other, and the multiple flame-retardant and heat-insulating protective plates B (9) protect the left side of the annealing furnace feed inlet.

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