Strip threading and leading furnace door

Abstract

The utility model relates to a tape threading and leading furnace door, which comprises a furnace door frame and a furnace door body covering the furnace door frame, and is characterized by further comprising a refractory fiber module, a mounting component and a movable frame, the refractory fiber module is fixed on the inner side of the furnace door body through the mounting component, and the movable frame is arranged on the furnace door frame. One side of the furnace door body is rotationally connected to the movable frame, and the distance between the furnace door body and the furnace door frame in the vertical direction can be changed through the movable frame. The furnace door has the advantages that a furnace door body which is only provided with an independent door plate and needs to be provided with a refractory fiber module independently is replaced, potential safety hazards of manual operation are eliminated, the situation that the furnace door cannot be used due to overhigh temperature and thermal deformation after long-time use is avoided, the service life of the furnace door is prolonged, and the production cost is reduced. The furnace door body can be opened and closed without foreign matter jamming and deformation under the condition that the installation space is limited, the structure is simple, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the field of production and processing, in particular to a belt threading and leading furnace door. Background Art

[0002] At present, threading and leading furnace doors are widely used in stainless steel continuous annealing furnaces and are also mostly used in stainless steel hot and cold coil mixed production lines. Existing threading and leading furnace doors have the following defects: Due to the special characteristics of the annealing furnace, the temperature of most operating parts of the threading and leading furnace doors is high during the trial period, making operation inconvenient and easy to burn; when filling refractory fibers, if the size and method are not mastered correctly, it is easy to cause the insulation effect of the threading and leading furnace door to decrease, the temperature of this part becomes high, and there is a risk of burning red. If it is not solved for a long time, it will cause the threading and leading furnace door to burn and cannot be used normally; in the early stage, the threading and leading furnace door will be carbonized due to long-term heating during the recovery process. In severe cases, it will cause damage to the castable inside the furnace, and it is necessary to apply for a maintenance project to enter the furnace to replace the castable, which takes a lot of time and repair costs to restore, which is costly. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a belt-threading and belt-leading furnace door which can improve safety and prolong service life in view of the above-mentioned existing technical status.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a belt-threading and belt-leading furnace door, comprising a furnace door frame and a furnace door body covering the furnace door frame, characterized in that: it also includes a refractory fiber module, an installation assembly and a movable frame, the refractory fiber module is fixed to the inner side of the furnace door body through the installation assembly, the movable frame is arranged on the furnace door frame, one side of the furnace door body is rotatably connected to the movable frame and the distance in the vertical direction from the furnace door frame can be changed through the movable frame.

[0005] The mounting assembly has a variety of structures. From the perspective of structural simplicity, preferably, the mounting assembly includes a connecting rod arranged on the inner side of the furnace door body and a fastener arranged in the refractory fiber module. The refractory fiber module passes through the connecting rod and is fixed to the inner side of the furnace door body by the fastener.

[0006] In order to enable the fastener to work on the refractory fiber module, the refractory fiber module has a through hole for the connecting rod to pass through, and the inner diameter of one end of the through hole is larger than the inner diameter of the middle part of the through hole, thereby forming a step at the end of the through hole to accommodate the fastener.

[0007] There are various ways to fasten the connecting rod and the fastener. Preferably, the top of the connecting rod has an external thread, and the fastener is a nut that matches the external thread.

[0008] In order to enable one side of the furnace door body to change the distance in the vertical direction from the furnace door frame through the movable frame, the movable frame includes two side panels arranged opposite to each other and a bottom plate connecting the two side panels. The two side panels are vertically arranged on the furnace door frame. A rotating shaft is provided on one side of the furnace door body. The rotating shaft is arranged between the two side panels and can move back and forth between the bottom plate and the furnace door frame.

[0009] In order to make the rotation of the furnace door body more stable, the two ends of the rotating shaft are sleeved with extension parts extending from the furnace door body, and the two extension parts are respectively in contact with the top and bottom of the movable frame.

[0010] Furthermore, a card block protruding outward is provided in the middle of the rotating shaft, and the movable frame has a groove capable of accommodating the rotation of the card block, and the card block is engaged with the groove.

[0011] In order to prevent the furnace door body from opening unexpectedly, the invention also includes a locking device which can lock the furnace door body when the furnace door body is covered on the furnace door frame.

[0012] The locking device has a variety of structures. From the perspective of structural simplicity, the locking device includes a fixed shaft arranged on the furnace door frame and a locking block rotatably connected to the fixed shaft. When the furnace door body is covered on the furnace door frame, the locking block abuts against the outer side of the furnace door body.

[0013] In order to facilitate opening and closing of the furnace door body, a handle is provided on the outside of the furnace door body.

[0014] Compared with the prior art, the advantages of the present invention are that the refractory fiber module in the belt-threading and belt-leading furnace door is fixed to the inner side of the furnace door body by an installation assembly, and one side of the furnace door body is rotatably connected to the movable frame and can change the distance in the vertical direction from the furnace door frame through the movable frame, thereby replacing the previous furnace door body which was only a separate door panel and required a separate placement of the refractory fiber module, eliminating the safety hazards of manual operation, avoiding the unusability caused by heat deformation due to excessive temperature after long-term use, extending the service life of the furnace door, improving the speed of handling abnormal belt breakage, and ensuring stable and continuous production of the unit, ensuring that the furnace door body can be opened and closed without obstruction or deformation of foreign objects under conditions of limited installation space, with a simple structure and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of the belt threading and leading furnace door in an open state in an embodiment of the present invention;

[0016] Figure 2 This is a structural diagram of a belt threading and leading furnace door in a semi-closed state in an embodiment of the present invention;

[0017] Figure 3This is a structural diagram of the belt threading and leading furnace door in a fully closed state in an embodiment of the present invention;

[0018] Figure 4 This is a structural diagram of an embodiment of the present invention in which the refractory fiber module is fixed to the inner side of the furnace door body through a mounting assembly. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1-4 As shown, a belt-threading and belt-leading furnace door of this embodiment includes a furnace door frame 1, a furnace door body 2 covering the furnace door frame 1, a refractory fiber module 3 for heat insulation, an installation component 4, a movable frame 5, a rotating shaft 6, a locking device 7 and a handle 8 provided on the outside of the furnace door body 2.

[0021] The mounting assembly 4 includes a connecting rod 41 provided on the inner side of the furnace door body 2 and a fastener 42 provided in the refractory fiber module 3. The top of the connecting rod 41 has an external thread, and the fastener 42 is a nut that matches the external thread. The refractory fiber module 3 has a through hole 3a through which the connecting rod 41 can pass. The inner diameter of one end of the through hole 3a is larger than the inner diameter of the middle part of the through hole 3a, thereby forming a step 3b at the end of the through hole 3a to accommodate the fastener 42. After the refractory fiber module 3 passes through the connecting rod 41, the fastener 42 is threadedly connected to the connecting rod 41 in the step 3b and locked, thereby fixing the refractory fiber module 3 to the inner side of the furnace door body 2. Figure 4 shown.

[0022] In this embodiment, the movable frame 5 is U-shaped as a whole and includes two side panels 51 arranged opposite to each other and a bottom panel 52 connecting the two side panels 51. The two side panels 51 are vertically arranged on the furnace door frame 1. A rotating shaft 6 is provided on one side of the furnace door body 2. The rotating shaft 6 is arranged between the two side panels 51 and is rotatably connected to the movable frame 5. The rotating shaft 6 can move back and forth between the bottom panel 52 and the furnace door frame 1, thereby changing the distance in the vertical direction from the furnace door frame 1, so that the refractory fiber module 3 can be moved to the inside of the furnace door frame 1 and then completely closed (such as Figure 3 As shown), the refractory fiber module 3 can also be moved to the outside of the furnace door frame 1 and then opened (as shown Figure 1 and Figure 2 shown).

[0023] In order to make the rotation of the furnace door body 2 more stable, the two ends of the rotating shaft 6 are provided with extension parts 2a extending from the furnace door body 2, and the two extension parts 2a are respectively abutted against the top and bottom of the movable frame 5; a card block 61 protruding outward is provided in the middle of the rotating shaft 6, and the movable frame 5 has a groove 5a that can accommodate the rotation of the card block 61, and the card block 61 is engaged with the groove 5a.

[0024] In order to lock the furnace door body 2 when it is covered with the furnace door frame 1, the locking device 7 includes a fixed shaft 71 provided on the furnace door frame 1 and a locking block 72 rotatably connected to the fixed shaft 71. There are two locking devices 7, one located above and one below the furnace door body 2.

[0025] When the furnace door body 2 is covered on the furnace door frame 1 (fully closed), the locking device 7 works, and the locking block 72 rotates to abut against the outer side of the furnace door body 2, thereby limiting the furnace door body 2 from further rotating. Figure 3 Of course, when the oven door body 2 is not covered on the oven door frame 1 (open or half-closed), the locking block 72 rotates to a state where it does not contact the oven door body 2 and does not interfere with the rotation of the oven door body 2. Figure 1 and Figure 2 shown.

Claims

1. A belt-threading and belt-leading furnace door, comprising a furnace door frame (1) and a furnace door body (2) covering the furnace door frame (1), characterized in that: The invention also includes a refractory fiber module (3), a mounting assembly (4) and a movable frame (5), wherein the refractory fiber module (3) is fixed to the inner side of the furnace door body (2) through the mounting assembly (4), and the movable frame (5) is arranged on the furnace door frame (1), and one side of the furnace door body (2) is rotatably connected to the movable frame (5) and can change the distance in the vertical direction with the furnace door frame (1) through the movable frame (5).

2. The belt-threading and belt-leading furnace door according to claim 1, characterized in that: The mounting assembly (4) comprises a connecting rod (41) provided on the inner side of the furnace door body (2) and a fastener (42) provided in the refractory fiber module (3); the refractory fiber module (3) passes through the connecting rod (41) and is fixed to the inner side of the furnace door body (2) by the fastener (42).

3. The belt-threading and belt-leading furnace door according to claim 2, characterized in that: The refractory fiber module (3) has a through hole (3a) through which a connecting rod (41) can pass, and the inner diameter of one end of the through hole (3a) is larger than the inner diameter of the middle part of the through hole (3a), thereby forming a step (3b) at the end of the through hole (3a) for accommodating a fastener (42).

4. The belt-threading and belt-leading furnace door according to claim 3, characterized in that: The top of the connecting rod (41) is provided with an external thread, and the fastener (42) is a nut matching the external thread.

5. The belt-threading and belt-leading furnace door according to claim 1, characterized in that: The movable frame (5) comprises two side panels (51) arranged opposite to each other and a bottom panel (52) connecting the two side panels (51). The two side panels (51) are vertically arranged on the furnace door frame (1). A rotating shaft (6) is provided on one side of the furnace door body (2). The rotating shaft (6) is arranged between the two side panels (51) and can move back and forth between the bottom panel (52) and the furnace door frame (1).

6. The belt-threading and belt-leading furnace door according to claim 5, characterized in that: Extension parts (2a) extending from the furnace door body (2) are sleeved on both ends of the rotating shaft (6), and the two extension parts (2a) are respectively in contact with the top and bottom of the movable frame (5).

7. The belt-threading and belt-leading furnace door according to claim 5, characterized in that: A clamping block (61) protruding outward is provided in the middle of the rotating shaft (6); the movable frame (5) has a groove (5a) capable of accommodating the rotation of the clamping block (61); the clamping block (61) is engaged with the groove (5a).

8. The belt-threading and belt-leading furnace door according to claim 1, characterized in that: It also includes a locking device (7) capable of locking the furnace door body (2) when the furnace door body (2) is covered on the furnace door frame (1).

9. The belt-threading and belt-leading furnace door according to claim 8, characterized in that: The locking device (7) comprises a fixed shaft (71) provided on the furnace door frame (1) and a locking block (72) rotatably connected to the fixed shaft (71); when the furnace door body (2) is covered on the furnace door frame (1), the locking block (72) abuts against the outer side of the furnace door body (2).

10. The belt-threading and belt-leading furnace door according to claim 1, characterized in that: A handle (8) is provided on the outside of the furnace door body (2).

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