Hood type annealing furnace inner cover lifting device

Abstract

The utility model discloses an inner cover lifting device of a cover type annealing furnace, which belongs to the technical field of cover type annealing furnace equipment and comprises an inner cover cylinder and an annular lifting ring, the inner cover cylinder is connected with the annular lifting ring through a plurality of connecting devices, and each connecting device comprises a base plate, a lower connecting plate and an upper connecting plate. The base plate is welded to the outer wall of the inner cover cylinder, the lower connecting plate is connected with the base plate, the upper connecting plate is connected with the annular hanging ring, and the lower connecting plate is connected with the upper connecting plate; the utility model aims to provide an inner cover lifting device for a cover type annealing furnace, which can stably lift an inner cover cylinder without occupying the space in the inner cover.

Description

Technical Field

[0001] The utility model belongs to the technical field of hood-type annealing furnace equipment and relates to a supporting device for a cooling hood of a hood-type annealing furnace in a cold rolling mill. Background Art

[0002] The bell-type annealing furnace is the most common type of heat treatment furnace for metal materials. The annealing furnace consists of a heating bell, a cooling bell, a furnace table and an inner bell. The heating bell burner burns gas to transfer heat to the inner bell, and then transfers the heat to the gas inside the inner bell to heat the steel coil to the heat treatment temperature. The inner bell is an important device for heat transfer and isolating the atmosphere in the furnace. During each use, the inner bell needs to be lifted by the top plate lifting ring. The cold rolled coil annealing inner bell structure adopts a single-layer design. There is an inner bell lifting ear for a bell-type annealing furnace (patent number CN213680820U). The inner bell lifting ear is installed on the outer wall of the outer barrel through the outer barrel reinforcement rib plate. The lifting ear body includes an upper connecting piece, a lower connecting piece and an intermediate buffer plate. The upper connecting piece is welded to the inner wall of the outer barrel, and the bottom is fixedly connected to the top of the intermediate buffer plate. The lower connecting piece is welded to the inner wall of the inner tank, and the top is movably connected to the bottom of the intermediate buffer plate, which can reduce the deformation probability of the inner bell, improve the stability of the bell-type annealing furnace equipment, and extend the service life of the inner bell. However, the connecting parts welded to the inner wall of the inner cover lifting ears during use will occupy the space inside the inner cover and reduce the number of steel coils installed inside the inner cover. The lifting ring connecting parts of the single-layer inner cover are all welded on the outer wall. The vertical ribs welded between the outer wall and the cylinder are prone to desoldering during repeated use, resulting in the separation of the ribs and the outer wall of the inner cover cylinder, causing the lifting rings to fall off. Utility Model Content

[0003] The problem to be solved by the utility model is to provide a lifting device for the inner cover of a cover-type annealing furnace, which can stably lift the inner cover cylinder without occupying the space inside the inner cover.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is: it includes an inner cover cylinder and an annular lifting ring, the inner cover cylinder and the annular lifting ring are connected by multiple connecting devices, the connecting devices include a pad, a lower connecting plate and an upper connecting plate, the pad is welded to the outer wall of the inner cover cylinder, the lower connecting plate is connected to the pad, the upper connecting plate is connected to the annular lifting ring, and the lower connecting plate is connected to the upper connecting plate.

[0005] In the above technical solution, a more specific technical solution may also be: the inner cover cylinder and the annular hanging ring are connected by twelve connecting devices.

[0006] Furthermore: both the lower connection and the upper connection plate are provided with pin holes, and the two upper connection plates are arranged on both sides of the upper connection plate and are inserted into the pin holes with pin shafts, which is convenient for the installation and disassembly of the annular lifting ring and the inner cover cylinder, and is beneficial to the later maintenance operations.

[0007] Furthermore: the pad is provided with a through hole, which effectively prevents the weld from being torn and detached due to thermal expansion and contraction of the inner cover cylinder. The lower connection is welded on the pad, and the upper connection plate is welded on the lower end of the annular lifting ring.

[0008] Furthermore: the width of the annular hanging ring is 100 mm and the thickness is 16 mm; the length of the pad is 100 mm, the width is 70 mm and the thickness is 12 mm; the thickness of the lower connecting plate and the upper connecting plate are both 12 mm.

[0009] Due to the adoption of the above technical scheme, the utility model has the following beneficial effects compared with the prior art: the pad is firmly welded to the outer wall of the inner cover cylinder around the periphery, and is connected to the annular lifting ring through the lower connecting plate and the upper connecting plate, so that the inner cover cylinder can be lifted without occupying the internal space of the inner cover cylinder, not only will the inner cover cylinder not be deformed during lifting, but it can also effectively prevent the problem of falling off caused by repeated lifting, thereby improving the stability of lifting the inner cover of the hood-type annealing furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model.

[0011] Figure 2 yes Figure 1 A magnified schematic diagram of area A in the middle.

[0012] Figure 3 yes Figure 2 sectional view of .

[0013] Figure 4 yes Figure 2 Right view of .

[0014] In the figure: 1, inner cover cylinder; 2, annular lifting ring; 3, connecting device; 31, pad; 311, through hole; 32, lower connecting plate; 33, upper connecting plate; 34, pin hole; 35, pin shaft. DETAILED DESCRIPTION

[0015] The utility model is further described in detail below with reference to the accompanying drawings:

[0016] like Figures 1 to 4The inner cover lifting device of the hood-type annealing furnace shown comprises an inner cover cylinder 1 and an annular lifting ring 2. The inner cover cylinder 1 and the annular lifting ring 2 are connected by a plurality of connecting devices 3. The connecting device 3 comprises a pad 31, a lower connecting plate 32 and an upper connecting plate 33. The pad 31 is welded to the outer wall of the inner cover cylinder 1. The lower connecting plate 32 is connected to the pad 31. The upper connecting plate 33 is connected to the annular lifting ring 2. The lower connecting plate 32 is connected to the upper connecting plate 33. The inner cover cylinder 1 and the annular lifting ring 2 are connected by twelve connecting devices 3. The lower connecting plate and the upper connecting plate 33 are both provided with pin holes 34. Two upper connecting plates 33 are arranged on both sides of the upper connecting plate 33 and are inserted into the pin holes 34 with pin shafts 35, so as to facilitate the installation and disassembly of the annular lifting ring 2 and the inner cover cylinder 1 and facilitate the later maintenance work. The pad 31 is provided with a through hole 311, which effectively prevents the weld from being torn and desoldering due to thermal expansion and contraction of the inner cover cylinder 1. The lower connection is welded on the pad 31, and the upper connection plate 33 is welded on the lower end of the ring ring 2. The ring ring 2 has a width of 100 mm and a thickness of 16 mm; the pad 31 has a length of 100 mm, a width of 70 mm, and a thickness of 12 mm; the thickness of the lower connection plate 32 and the upper connection plate 33 are both 12 mm.

Claims

1. A lifting device for an inner cover of a hood-type annealing furnace, comprising an inner cover cylinder and an annular lifting ring, wherein the inner cover cylinder and the annular lifting ring are connected by a plurality of connecting devices, characterized in that: The connecting device includes a pad, a lower connecting plate and an upper connecting plate. The pad is welded on the outer wall of the inner cover cylinder around four sides. The lower connecting plate is connected to the pad, the upper connecting plate is connected to the annular lifting ring, and the lower connecting plate is connected to the upper connecting plate.

2. The inner cover lifting device of the bell-type annealing furnace according to claim 1 is characterized in that: The inner cover cylinder and the annular suspension ring are connected via twelve connecting devices.

3. The inner cover lifting device of the bell-type annealing furnace according to claim 1 or 2, characterized in that: The lower connection plate and the upper connection plate are both provided with pin holes, and the two upper connection plates are arranged on both sides of the upper connection plate and are inserted into the pin holes by pin shafts.

4. The inner cover lifting device of the bell-type annealing furnace according to claim 3 is characterized in that: The backing plate is provided with a through hole, the lower connection is welded to the backing plate, and the upper connection plate is welded to the lower end of the annular hanging ring.

5. The inner cover lifting device of the bell-type annealing furnace according to claim 4, characterized in that: The width of the annular hanging ring is 100 mm and the thickness is 16 mm; the length of the pad is 100 mm, the width is 70 mm and the thickness is 12 mm; the thickness of the lower connecting plate and the upper connecting plate are both 12 mm.

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