Anti-loosening structure for furnace door

Abstract

The utility model provides an anti-loosening structure for a furnace door, which can enable the furnace door and a furnace body to be continuously kept sealed during power failure, so as to prevent the temperature in an annealing furnace from being quickly reduced. The sealing device comprises a furnace body and furnace doors, a sealing structure is arranged between the furnace body and the opposite furnace door, and the sealing structure comprises a protruding sealing cutter arranged on the furnace body or the furnace door and a ceramic fiber packing arranged on the furnace door or the furnace body and opposite to the sealing cutter; screws are connected to the two sides of the furnace door through threads, a check block and a hand wheel are fixed to the end, away from the furnace body, of each screw, a nut is arranged on the furnace body opposite to the end, facing the furnace body, of each screw, and when the hand wheels are rotated, the screws are screwed into the nuts, the check blocks make contact with the furnace door, the furnace door and the furnace body are sealed, and the sealing cutters tightly press the opposite ceramic fiber packing.

Description

Technical Field

[0001] The utility model relates to a furnace door anti-loosening structure, in particular to a furnace door anti-loosening structure of an annealing furnace. Background Art

[0002] When the annealing furnace is annealing workpieces such as aluminum foil, its furnace door is generally sealed with the furnace body by the action of a hydraulic cylinder, which is connected to a hydraulic system including an electric hydraulic pump that supplies hydraulic oil to it. However, when the power is unexpectedly cut off, the hydraulic oil in the hydraulic cylinder will lose pressure, and the furnace door may become loose and no longer remain sealed with the furnace body. Summary of the invention

[0003] The utility model aims to provide a furnace door anti-loosening structure, which can keep the furnace door and the furnace body sealed when the power is off, so as to prevent the temperature in the annealing furnace from dropping rapidly.

[0004] In order to achieve the above technical purpose, the technical solution adopted by the utility model is:

[0005] The furnace door anti-loosening structure comprises a furnace body and a furnace door. A sealing structure is provided between the furnace body and the relative furnace door. The sealing structure comprises a protruding sealing knife arranged on the furnace body or the furnace door and a ceramic fiber packing arranged on the furnace door or the furnace body opposite to the sealing knife. Screws are connected on both sides of the furnace door by threads, a stopper and a hand wheel are fixed at one end of the screw away from the furnace body, a nut is provided on the furnace body opposite to the end of the screw facing the furnace body, when the hand wheel is turned, the screw is screwed into the nut, the stopper contacts the furnace door, the furnace door and the furnace body are sealed, and the sealing knife presses the relative ceramic fiber packing.

[0006] The above-mentioned furnace door anti-loosening structure has two inner and outer sealing structures between the furnace body and the relative furnace door. The sealing knives in the inner and outer sealing structures are respectively arranged on the furnace body and the furnace door, and the ceramic fiber packing opposite to the sealing knives is arranged on the furnace door and the furnace body.

[0007] In the above-mentioned furnace door anti-loosening structure, the ceramic fiber packing is embedded in the packing groove fixed on the furnace door or the furnace body.

[0008] The above-mentioned furnace door anti-loosening structure has a hydraulic cylinder between the furnace body and the furnace door for pushing the furnace door to move relative to the furnace body. The hydraulic cylinder is connected to a hydraulic system including an electric hydraulic pump that provides hydraulic oil thereto. When the furnace door is in a sealed state with the furnace body driven by the hydraulic oil pump, the screw is not screwed into the nut; when the hydraulic system is powered off, the hand wheel is turned, the screw is screwed into the nut, and the block contacts the furnace door, so that the furnace door and the furnace body continue to remain in a sealed state.

[0009] The beneficial effects of the utility model are:

[0010] Ceramic fiber packing belongs to the existing technology and can withstand high temperatures of about 1000°C. The utility model uses ceramic fiber packing to ensure that the annealing furnace will not fail during long-term use and ensure the sealing performance. Turn the hand wheel to screw the screw into the nut, the block contacts the furnace door, and push the furnace door toward the furnace body, so that the furnace door and the furnace body are in a sealed state. The internal and external sealing structures further ensure the sealing effect. The ceramic fiber packing is embedded in the packing groove to prevent the ceramic fiber packing from moving and misaligning with the sealing knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of annealing furnace.

[0012] Figure 2 for Figure 1 Left view of .

[0013] Figure 3 for Figure 1 Top view of the .

[0014] Figure 4 This is a top view of the furnace door, furnace body and other structures.

[0015] Figure 5 This is a side view of the furnace door anti-loosening structure.

[0016] Figure 6 This is the main view of the furnace door anti-loosening structure.

[0017] Figure 7 This is a top view of the furnace door anti-loosening structure.

[0018] In the figure, the furnace door 1, the cross bar 11, the slide bar 12, the packing groove 71, the hydraulic cylinder 3, the guide plate 4, the guide groove 41, the furnace door up and down drive mechanism 5, the chain 51, the sprocket 52,

[0019] Sealing knife 6, ceramic fiber packing 7, furnace door anti-loosening structure 8, screw seat 81, screw 82, block 83, hand wheel 84, nut 85, bracket 86. DETAILED DESCRIPTION

[0020] The specific implementation of the utility model is further described below according to the accompanying drawings:

[0021] like Figure 1As shown, a cross bar 11 is fixed on the upper and lower parts of both sides of the front part of the furnace door 1, and a slide bar 12 extends from the end of the cross bar to the side. A hydraulic cylinder 3 is arranged on the upper and lower sides of the furnace body 2, and the piston rod of the hydraulic cylinder 3 is connected to the guide plate 4, which can drive the guide plate to move forward and backward relative to the furnace body. The guide plate 4 has a guide groove 41 extending up and down. The slide bar 12 extends into the guide groove 41 and can slide up and down relative to the guide groove 41. The furnace door up and down driving mechanism 5 includes a chain 51, a sprocket 52, etc. The upper and lower ends of the cross bar 11 are connected to the two ends of the chain 51 surrounding the sprocket 52. The sprocket rotates to drive the furnace door 1 to move up and down relative to the furnace body 2, and the slide bar 12 moves up and down in the guide groove 41.

[0022] There are two inner and outer sealing structures between the furnace body and the furnace door. The sealing knife 6 in the inner sealing structure is arranged on the front side of the furnace body 2 and protrudes from the front side of the furnace body, and the ceramic fiber packing 7 opposite to the sealing knife 6 is embedded in the packing groove 71 fixed on the furnace door 1. The outer sealing structure is the same as the inner sealing structure, except that the sealing knife 6 in the outer sealing structure is arranged on the rear side of the furnace door 1 and protrudes from the rear side of the furnace door, and the ceramic fiber packing 7 opposite to the sealing knife 6 is embedded in the packing groove 71 fixed on the furnace body 2.

[0023] On both sides of the furnace door, there is a furnace door anti-loosening structure 8, including a screw seat 81 fixed on the furnace door and extending to both sides of the furnace door, a screw 82 extending forward and backward is connected to the screw seat 81 by threads, a stopper 83 and a hand wheel 84 are fixed to one end of the screw 82 away from the furnace body (the front end of the screw), and a nut 85 is fixed to the front side of the furnace body 2 opposite to the rear end of the screw 82, or the nut 85 is fixed to a bracket 86, and the bracket 86 is fixed to the front side of the furnace body. When the furnace body and the furnace door are in a sealed state, the screw 82 and the nut 85 are in a front-to-back relative position.

[0024] When the furnace door 1 moves to the lower pre-sealing position driven by the furnace door upper and lower driving mechanism 5, the hydraulic cylinder 3 is activated, driving the guide plate 4 to move toward the furnace body, pulling the slide bar 12, the furnace door 1, etc. close to the furnace body 2, and the sealing knife 6 presses the relative ceramic fiber packing 7, so that the furnace door and the furnace body are in a sealed state. At this time, if the power is lost, the hydraulic system that provides hydraulic oil to the hydraulic cylinder is powered off, and the hand wheel 84 can be turned to screw the screw 82 into the nut 85, and the block 83 contacts the furnace door 1, pushing the furnace door to move toward the furnace body, and the sealing knife presses the relative ceramic fiber packing, so that the furnace door and the furnace body continue to maintain a sealed state.

[0025] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. The furnace door anti-loosening structure is characterized by: The invention comprises a furnace body and a furnace door. A sealing structure is provided between the furnace body and the furnace door. The sealing structure comprises a protruding sealing knife arranged on the furnace body or the furnace door and a ceramic fiber packing arranged on the furnace door or the furnace body opposite to the sealing knife. Screws are connected on both sides of the furnace door by threads. A stopper and a hand wheel are fixed at one end of the screw away from the furnace body. A nut is provided on the furnace body opposite to the end of the screw facing the furnace body. When the hand wheel is turned, the screw is screwed into the nut, the stopper contacts the furnace door, the furnace door and the furnace body are sealed, and the sealing knife presses the ceramic fiber packing opposite to each other.

2. The furnace door anti-loosening structure according to claim 1, characterized in that: There are inner and outer sealing structures between the furnace body and the corresponding furnace door. The sealing knives in the inner and outer sealing structures are respectively arranged on the furnace body and the furnace door, and the ceramic fiber packing opposite to the sealing knives is arranged on the furnace door and the furnace body.

3. The furnace door anti-loosening structure according to claim 2, characterized in that: The ceramic fiber packing is embedded in the packing groove fixed on the furnace door or furnace body.

4. The furnace door anti-loosening structure according to claim 1, characterized in that: A hydraulic cylinder is provided between the furnace body and the furnace door to push the furnace door to move relative to the furnace body. The hydraulic cylinder is connected to a hydraulic system including an electric hydraulic pump that provides hydraulic oil to the hydraulic cylinder. When the furnace door is in a sealed state with the furnace body driven by the hydraulic oil pump, the screw is not screwed into the nut. When the hydraulic system is powered off, the hand wheel is turned, the screw is screwed into the nut, and the block contacts the furnace door, so that the furnace door and the furnace body continue to remain in a sealed state.

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