Large-span and heavy-load self-lifting walking sealing furnace cover

Abstract

The utility model discloses a large-span and heavy-load self-lifting walking sealing furnace cover which comprises a furnace cover body connected with a lifting walking mechanism, the lifting walking mechanism comprises a rack, a guide rail and a walking support moving along the guide rail are arranged on the rack, the furnace cover further comprises lifting assemblies arranged on the walking support, and each lifting assembly comprises a lifting motor. The furnace cover body is connected with two horizontal rotating shafts which are coaxially arranged through a gearbox and a coupler, each horizontal rotating shaft is connected with a vertical lead screw through a worm and gear mechanism, the vertical lead screws are provided with extension arms connected with lead screw nuts, and the extension arms are connected with the furnace cover body. The furnace cover opening device is simple in structure, convenient to use, high in safety and low in maintenance cost, automatic control can replace manual high-altitude hoisting to open the furnace cover in the production process of the nitriding furnace, operation simplicity and work efficiency are improved, economic investment is reduced, and hardware support is provided for achieving comprehensive automation of the furnace.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary equipment of nitriding furnaces, in particular to a large-span, heavy-load self-lifting and walking sealed furnace cover. Background Art

[0002] The electric heating nitriding furnace is used for firing nitrided products. During the firing process, the nitriding furnace needs to be covered with a furnace cover to keep warm, insulate, seal, and provide an excellent atmosphere for firing nitrided products. After firing, the furnace cover is lifted and removed. The traditional nitriding furnace cover is equipped with a lifting lug. When lifting, first connect the lifting lug to the crane, and then start the crane. Since the installation of the crane has certain requirements for the plant structure, it will increase the economic cost; secondly, due to the large volume and tonnage of the furnace cover (the span is usually more than 5 meters and the weight is usually more than 2 tons), it is easy to have unstable conditions such as positioning difficulties and furnace cover tilting during lifting. In order to ensure the safety of lifting, one worker is required to direct the lifting, and two other workers are required to maintain the balance of the furnace cover. The whole process is cumbersome and time-consuming. Summary of the invention

[0003] In order to solve the above problems, the utility model provides a large-span, heavy-load self-lifting and walking sealed furnace cover, which can specifically adopt the following technical solutions:

[0004] The large-span, heavy-load self-lifting and traveling sealed furnace cover of the utility model comprises a furnace cover body, wherein the furnace cover body is connected to a lifting and traveling mechanism arranged on both sides of the top of the nitriding furnace, and the lifting and traveling mechanism comprises

[0005] A frame, wherein the frame is provided with guide rails located on both sides of the nitriding furnace;

[0006] A walking bracket is arranged above the guide rail, each of the walking brackets is provided with a walking wheel driven by a translation motor, and the walking wheel is arranged corresponding to the guide rail;

[0007] The lifting components are arranged on the traveling bracket, and each lifting component includes a lifting motor, which is connected to two coaxially arranged horizontal rotating shafts through a gearbox and a coupling, and each of the horizontal rotating shafts is connected to a vertical screw through a worm gear mechanism, and the vertical screw is provided with an extension arm connected to the screw nut, and the extension arm is connected to the furnace cover body.

[0008] The furnace cover body is provided with a plurality of reinforcing ribs perpendicular to the traveling direction.

[0009] A horizontal displacement sensor is provided on the walking bracket, and a vertical displacement sensor is provided on the extension arm. The signal output end of the horizontal displacement sensor and the signal output end of the vertical displacement sensor are electrically connected to the signal input end of the control center respectively, and the control output end of the control center is electrically connected to the control input end of the translation motor and the control input end of the lifting motor respectively.

[0010] The traveling wheel is a double-sided wheel hub adapted to the width of the guide rail.

[0011] The extension arm is an F-shaped structure with reinforcement ribs.

[0012] The large-span, heavy-load self-lifting and walking sealed furnace cover provided by the utility model has a simple structure, is easy to use, and has low installation and maintenance costs. It can replace manual high-altitude lifting to open the furnace cover during the production process of the nitriding furnace with automatic control, thereby eliminating the safety hazards caused by improper operation during the manual lifting process; at the same time, it reduces labor expenses, improves operational simplicity and work efficiency, saves the factory building from the configuration of a crane, reduces economic costs, and provides hardware support for the realization of comprehensive automation of the kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 yes Figure 1 main view.

[0015] Figure 3 yes Figure 2 Top view of the .

[0016] Figure 4 yes Figure 2 Right view of .

[0017] Figure 5 yes Figure 1 Enlarged view of part A in .

[0018] Figure 6 yes Figure 1 Enlarged view of part B in . DETAILED DESCRIPTION

[0019] The following is a detailed description of an embodiment of the utility model in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the utility model, and a detailed implementation method and a specific working process are given, but the protection scope of the utility model is not limited to the following embodiment.

[0020] like Figure 1-6As shown, the large-span, heavy-load self-lifting and traveling sealed furnace cover described in the utility model includes a furnace cover body 1, which is connected to a lifting and traveling mechanism arranged on both sides of the top of the nitriding furnace, and the lifting and traveling mechanism is composed of a frame, a traveling bracket 2 and a lifting assembly.

[0021] Specifically, a pair of parallel guide rails 3 located on both sides of the top of the nitriding furnace are installed on the frame, and two walking brackets 2 are correspondingly arranged. A plurality of walking wheels 4 are installed on each walking bracket 2, and one of the walking wheels 4 is connected to the translation motor 5 and driven by it. In this embodiment, the walking wheels 4 all use double-sided hubs that are compatible with the width of the guide rails 3. The lifting assembly is arranged on the walking bracket 2, and each lifting assembly includes a lifting motor 6. Each lifting motor 6 is connected to two coaxially arranged horizontal shafts 9 through a gearbox 7 and a coupling 8. Each horizontal shaft 9 is connected to a vertical screw 11 through a worm gear mechanism 10. An extension arm 12 connected to a screw nut is installed on the vertical screw 11, and each extension arm is connected to the furnace cover body 1. A plurality of reinforcing ribs 13 perpendicular to the walking direction are welded on the above-mentioned furnace cover body 1, which are used to adjust the rigidity of the furnace cover body 1 to prevent it from being deformed due to gravity. The extension arm 12 adopts an F-shaped structure with reinforcing ribs, which can not only connect the furnace cover body 1 with the lifting and traveling mechanism, but also prevent the furnace cover body 1 from interfering with the lifting and traveling mechanism.

[0022] Furthermore, in order to improve the degree of automation of equipment operation, a horizontal displacement sensor 14 is installed on the walking bracket 2, and a vertical displacement sensor 15 is installed on the extension arm 12, wherein the signal output end of the horizontal displacement sensor 14 and the signal output end of the vertical displacement sensor 15 are respectively electrically connected to the signal input end of the control center, and the control output end of the control center is respectively electrically connected to the control input end of the translation motor 5 and the control input end of the lifting motor 6.

[0023] When the nitriding furnace cover needs to be opened, the lifting motor 6 is started to make the gearbox 7, coupling 8, horizontal shaft 9, and worm gear mechanism 10 drive the two vertical screws 11 to rotate clockwise, and the screw nut and the extension arm 12 are moved upward through the threaded transmission, thereby driving the furnace cover body 1 to open. When the furnace cover body 1 rises to the set height, the vertical displacement sensor 15 sends a signal to the control center to stop the lifting motor 6, thereby stopping the furnace cover body 1 from rising; at the same time, the translation motor 5 drives the walking wheel 4 to rotate after being decelerated by the reduction box, so that the furnace cover body 1 moves horizontally. When the furnace cover body 1 reaches the preset position, the horizontal displacement sensor 14 sends a signal to the control center to stop the translation motor 5, thereby stopping the furnace cover body 1 from moving horizontally.

[0024] When it is necessary to close the cover of the nitriding furnace, start the translation motor 5 to make the travel wheel 4 move in the opposite direction along the guide rail 3, so that the cover body 1 moves horizontally. When the cover body 1 reaches the preset position, the horizontal displacement sensor 14 sends a signal to the control center to stop the translation motor 5, so that the cover body 1 stops moving horizontally. At the same time, start the lifting motor 6 to make the gearbox 7, coupling 8, horizontal shaft 9, and worm gear mechanism 10 drive the two vertical screws 11 to rotate counterclockwise, and the screw nut and the extension arm 12 move downward through the threaded transmission, thereby driving the cover body 1 to close. When the cover body 1 is completely closed, the vertical displacement sensor 15 sends a signal to the control center to stop the lifting motor 6, so that the cover body 1 stops descending.

[0025] The large-span, heavy-load self-lifting and walking sealed furnace cover described in the utility model can simultaneously meet the requirements of efficient production, convenient maintenance and cost saving. Compared with the prior art, it has the following advantages:

[0026] 1) The utility model is an optimized design based on the traditional kiln furnace cover. By improving the furnace cover and adding a lifting and walking mechanism, the self-lifting and walking functions of the furnace cover are completed. Compared with the traditional furnace cover, it saves the workers from the on-site high-altitude lifting operation and eliminates the safety hazards caused by improper lifting operation in the production process.

[0027] 2) The traditional furnace cover needs four people to operate simultaneously during the opening and closing hoisting process: two people maintain the balance of the furnace cover, and two people respectively operate the crane and direct, which requires more manpower and the operation process is cumbersome. Compared with the traditional furnace cover, the utility model only needs one person to complete the operation, saving labor costs.

[0028] 3) The utility model adopts automatic control mode for operation, which is convenient to operate and more efficient than the traditional furnace cover.

[0029] 4) The utility model adopts a self-lifting walking mechanism to replace the factory crane device. Compared with the traditional furnace cover, it can optimize the factory and save economic costs.

[0030] It should be noted that, in the description of the present invention, terms indicating orientation or positional relationships, such as "front", "rear", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

Claims

1. A large-span, heavy-load self-lifting and walking sealed furnace cover, characterized in that: It includes a furnace cover body, which is connected to a lifting and traveling mechanism arranged on both sides of the top of the nitriding furnace. The lifting and traveling mechanism includes A frame, wherein the frame is provided with guide rails located on both sides of the nitriding furnace; A walking bracket is arranged above the guide rail, each of the walking brackets is provided with a walking wheel driven by a translation motor, and the walking wheel is arranged corresponding to the guide rail; The lifting components are arranged on the traveling bracket, and each lifting component includes a lifting motor, which is connected to two coaxially arranged horizontal rotating shafts through a gearbox and a coupling, and each of the horizontal rotating shafts is connected to a vertical screw through a worm gear mechanism, and the vertical screw is provided with an extension arm connected to the screw nut, and the extension arm is connected to the furnace cover body.

2. The large-span, heavy-load self-lifting and traveling sealed furnace cover according to claim 1 is characterized in that: The furnace cover body is provided with a plurality of reinforcing ribs perpendicular to the running direction.

3. The large-span, heavy-load self-lifting and traveling sealed furnace cover according to claim 1 is characterized in that: A horizontal displacement sensor is provided on the walking bracket, and a vertical displacement sensor is provided on the extension arm. The signal output end of the horizontal displacement sensor and the signal output end of the vertical displacement sensor are electrically connected to the signal input end of the control center respectively, and the control output end of the control center is electrically connected to the control input end of the translation motor and the control input end of the lifting motor respectively.

4. The large-span, heavy-load self-lifting and traveling sealed furnace cover according to claim 1 is characterized in that: The traveling wheel is a double-sided wheel hub adapted to the width of the guide rail.

5. The large-span, heavy-load self-lifting and traveling sealed furnace cover according to claim 1 is characterized in that: The extension arm is an F-shaped structure with reinforcement ribs.

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