Anti-collision furnace door of tunnel furnace

Abstract

The utility model discloses an anti-collision furnace door of a tunnel furnace, which comprises a door frame, a lower hem and a guide wheel, the door frame is provided with a mounting groove, the lower hem is mounted in the mounting groove and hung on the door frame through a connecting shaft, and the lower hem can swing around the connecting shaft under the action of external force. The guide wheels are installed on the lower hem, the working faces of the guide wheels protrude out of the outer surface of the lower hem, the rolling direction of the guide wheels is tangent to the moving direction of the steel billet, and when the steel billet advances, the guide wheels and the steel billet form rolling friction to jack up the lower hem. According to the anti-collision furnace door of the tunnel furnace, the lower hem capable of swinging is installed on the door frame, then the guide wheels capable of rolling are installed on the lower hem, a steel billet makes contact with the furnace door to form a movable motion mode so as to avoid hard collision, the lower hem rotates under pushing of the steel billet, the furnace door cannot deform, and the service life of the furnace door is prolonged. The problem that in the prior art, under the condition that lifting of the furnace door fails, steel billets collide with the furnace door, and consequently the furnace door deforms is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel production, in particular to an anti-collision furnace door of a tunnel furnace. Background Art

[0002] The entrance and exit of the existing thin slab continuous casting and rolling roller-hearth tunnel furnace are both equipped with liftable furnace doors. The functions of the furnace door are, firstly, to ensure that the furnace is relatively closed to facilitate heating and control the flame inside the furnace from escaping out; secondly, to ensure that nearby equipment is not baked at high temperatures and affect its operating conditions and service life.

[0003] Timely opening and closing of the furnace door is crucial. When the furnace door fails to be lifted, the billet will collide with the furnace door when it approaches the furnace door, which will cause the furnace door to deform in the long term. The deformed furnace door cannot seal the furnace chamber tightly, and normal heating will cause the flame to leak out, and other equipment nearby will be damaged by high temperature baking. It will also cause the incompletely burned gas in the furnace to leak out, posing a major safety hazard.

[0004] In view of this, it is necessary to propose a tunnel furnace anti-collision furnace door to solve the above defects. Utility Model Content

[0005] The main purpose of the utility model is to provide a tunnel furnace anti-collision furnace door, aiming to solve the problem that the existing furnace door is deformed by collision, resulting in poor sealing of the furnace and leakage of furnace flame and gas.

[0006] To achieve the above-mentioned purpose, the utility model provides a tunnel furnace anti-collision furnace door, including a door frame, a hem and a guide wheel, the door frame is provided with an installation groove, the hem is installed in the installation groove and is suspended on the door frame through a connecting shaft, the hem can swing around the connecting shaft under the action of external force, the guide wheel is installed on the hem and the working surface of the guide wheel protrudes from the outer surface of the hem, the rolling direction of the guide wheel is tangent to the movement direction of the billet, when the billet moves, the guide wheel and the billet form rolling friction to lift the hem.

[0007] Preferably, a first mounting hole and a second mounting hole are opened at upper and lower positions of the hem along its length direction, the short axis is assembled into the first mounting hole from the side of the door frame, and the long axis passes through the door frame and is assembled into the second mounting hole.

[0008] Preferably, the first mounting hole is a blind hole, and the second mounting hole is a through hole.

[0009] Preferably, the short shaft is a screw.

[0010] Preferably, the guide wheels are multiple and arranged side by side.

[0011] Preferably, there are two guide wheels.

[0012] Preferably, a plurality of pieces of refractory wool are installed on the door frame, and the refractory wool is fixed to the door frame by tie rod screws.

[0013] Preferably, the door frame is in the shape of a door.

[0014] Preferably, a hanging hole is provided on the top of the door frame, and a chain passes through the hanging hole to fix the door frame on the furnace.

[0015] Preferably, the cross-section of the top of the hem is arc-shaped.

[0016] Compared with the prior art, the tunnel furnace anti-collision furnace door provided by the utility model has the following beneficial effects:

[0017] The anti-collision furnace door of the tunnel furnace provided by the utility model is achieved by installing a swingable hem on the door frame, and then installing a rollable guide wheel on the hem, so that the contact between the steel billet and the furnace door forms an active movement mode to avoid hard collision. The hem rotates under the push of the steel billet, so that the furnace door will not be deformed, and the effect of closing the furnace chamber is achieved, which solves the problem of deformation of the furnace door caused by collision between the steel billet and the furnace door when the furnace door lifting fails in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of the anti-collision furnace door of the tunnel furnace provided by the utility model;

[0020] Figure 2 for Figure 1 The structural exploded view of the anti-collision furnace door of the tunnel furnace shown;

[0021] Figure 3 for Figure 1 A cross-sectional view of a tunnel furnace anti-collision furnace door is shown.

[0022] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0027] Please refer to Figure 1 and Figure 2The utility model provides a tunnel furnace anti-collision furnace door. The tunnel furnace anti-collision furnace door is installed at the material inlet and outlet of the furnace. The tunnel furnace door includes a door frame 1, a hem 3 and a guide wheel 5. The door frame 1 is provided with a mounting groove 11. The hem 3 is mounted in the mounting groove 11 and is suspended on the door frame 1 through a connecting shaft. The hem 3 can swing around the connecting shaft under the action of an external force. The guide wheel 5 is mounted on the hem 3 and the working surface of the guide wheel 5 protrudes from the outer surface of the hem 3. The rolling direction of the guide wheel 5 is tangent to the moving direction of the billet. When the billet moves, the guide wheel 5 forms rolling friction with the billet to lift the hem 3. When the furnace door lifting fails, when the billet is pushed toward the material inlet and outlet, it first contacts the guide wheel 5 and generates rolling friction, pushing the hem 3. The hem 3 rotates around the connecting shaft to open the channel. After the billet enters, under the action of gravity, the hem 3 is lowered and restored to a vertical state. Therefore, by installing a swingable hem 3 on the door frame 1 and then installing a rollable guide wheel 5 on the hem 3, the contact between the steel billet and the furnace door forms an active movement mode to avoid hard collision. The hem 3 rotates under the push of the steel billet without forming an impact, so that the furnace door will not be deformed, and the effect of closing the furnace chamber is achieved, which solves the problem of deformation of the furnace door caused by collision between the steel billet and the furnace door when the furnace door lifting fails in the prior art.

[0028] See also Figure 3 Specifically, in this embodiment, the lower hem 3 is provided with a first mounting hole 31 and a second mounting hole 33 at two positions above and below along its length direction, the short shaft 7 is assembled into the first mounting hole 31 from the side of the door frame 1, and the long shaft 8 passes through the door frame 1 and is assembled into the second mounting hole 33. Through holes are provided on both sides of the door frame 1, and the short shaft 7 passes through and is installed on the door frame 1. One end of the short shaft 7 is fixed to the side of the door frame 1, and the other end extends toward the direction of the lower hem 3 to form a cantilever structure. It can be understood that in order to facilitate the rotation of the lower hem 3, the short shaft 7 forms a clearance fit with the first mounting hole 31 on the lower hem 3.

[0029] Furthermore, the cross section of the top of the hem 3 is in an arc shape. Since the hem 3 is in a swinging motion mode, the motion resistance can be reduced when the top of the hem 3 contacts the door frame 1. In addition, it is worth mentioning that in order to make the sealing performance of the connection between the hem 3 and the door frame 1 better, a plurality of filling grooves 17 are opened on the top of the hem 3, and asbestos is filled into the filling grooves 17.

[0030] Specifically, the first mounting hole 31 is a blind hole, and the second mounting hole 33 is a through hole. The long shaft 8 enters from the end of the second mounting hole 33 to the center position to fix the guide wheel 5. It is worth mentioning that after the long shaft 8 is installed in the second mounting hole 33, the two ends of the hole are blocked with fire-resistant cotton 9 to prevent the long shaft 8 from deforming at high temperature.

[0031] Specifically, the short shaft 7 is a screw.

[0032] Specifically, the guide wheels 5 are multiple and arranged side by side. Preferably, in this embodiment, there are two guide wheels 5. The two guide wheels 5 are installed in the middle of the hem 3 to better contact with the steel billet.

[0033] The door frame 1 is provided with a plurality of refractory wools 9, which are fixed to the door frame 1 by tie rod screws 15. The refractory wools 9 can improve the fire resistance of the furnace door and extend its service life. Specifically, the door frame 1 is in the shape of a door.

[0034] A hanging hole 10 is provided on the top of the door frame 1, and a chain passes through the hanging hole 10 to fix the door frame 1 on the furnace, and a lifting device installed on the furnace drives the furnace door to rise and fall.

[0035] The anti-collision furnace door of the tunnel furnace provided by the utility model is realized by installing a swingable hem 3 on the door frame 1, and then installing a rollable guide wheel 5 on the hem 3, so that the contact between the steel billet and the furnace door forms an active movement mode to avoid hard collision. The hem 3 rotates under the push of the steel billet, so that the furnace door will not be deformed, and the effect of closing the furnace chamber is achieved, which solves the problem of deformation of the furnace door caused by collision between the steel billet and the furnace door when the furnace door lifting fails in the prior art.

[0036] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A tunnel furnace anti-collision furnace door, characterized in that: It includes a door frame, a hem and a guide wheel. The door frame is provided with a mounting groove. The hem is mounted in the mounting groove and suspended on the door frame through a connecting shaft. The hem can swing around the connecting shaft under the action of an external force. The guide wheel is mounted on the hem and the working surface of the guide wheel protrudes from the outer surface of the hem. The rolling direction of the guide wheel is tangent to the moving direction of the billet. When the billet moves, the guide wheel and the billet form rolling friction to lift the hem.

2. The anti-collision door of a tunnel furnace according to claim 1, characterized in that: The lower hem is provided with a first mounting hole and a second mounting hole along its length direction at upper and lower positions; the short axis is assembled into the first mounting hole from the side of the door frame; and the long axis passes through the door frame and is assembled into the second mounting hole.

3. The anti-collision door of tunnel furnace according to claim 2, characterized in that: The first mounting hole is a blind hole, and the second mounting hole is a through hole.

4. The anti-collision door of a tunnel furnace according to claim 2, characterized in that: The short shaft is a screw.

5. The anti-collision door of a tunnel furnace according to claim 1, characterized in that: The guide wheels are multiple and arranged side by side.

6. The anti-collision furnace door of the tunnel furnace according to claim 5, characterized in that: There are two guide wheels.

7. The anti-collision door of a tunnel furnace according to claim 1, characterized in that: A plurality of pieces of fire-resistant cotton are installed on the door frame, and the fire-resistant cotton is fixed to the door frame by tie rod screws.

8. The anti-collision door of a tunnel furnace according to claim 1, characterized in that: The door frame is in the shape of a door.

9. The anti-collision furnace door of a tunnel furnace according to claim 1, characterized in that: A hanging hole is provided on the top of the door frame, and a chain passes through the hanging hole to fix the door frame on the furnace.

10. The anti-collision furnace door of the tunnel furnace according to claim 1, characterized in that: The cross section of the top of the hem is in an arc shape.

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