A furnace fume hood opening structure

Abstract

This utility model discloses a furnace fume hood opening structure, including a fume hood body, a fume hood door, and an opening assembly. An opening is provided on one side of the fume hood body. Moving guide rails are provided at both the upper and lower ends of the opening side of the fume hood body. The fume hood door is located on the moving guide rails. The opening assembly is located beside the opening surface of the fume hood body and below the fume hood door. The opening assembly includes a reducer bracket, a reducer, a friction sprocket, and a chain. The reducer bracket is located at the lower end of the opening side of the fume hood body. The reducer is mounted on the reducer bracket. The friction sprocket is mounted on the reducer bracket and connected to the output end of the reducer. The chain is located between the fume hood door and the moving guide rail at the lower end of the opening side of the fume hood body, and its tail is connected to the friction sprocket. This furnace fume hood opening structure uses a chain instead of traditional steel wire rope, improving adaptability to harsh environments. Simultaneously, the design of the friction sprocket structure achieves redundant design for door opening limit, protecting the entire furnace fume hood from damage.

Description

Technical Field

[0001] This utility model belongs to the field of aluminum smelting, and specifically relates to a door opening structure for a melting furnace fume hood. Background Technology

[0002] An aluminum alloy melting furnace is developed based on the aluminum smelting process. It is used to continuously heat and melt aluminum alloy raw materials such as aluminum ingots and aluminum scraps into molten aluminum for subsequent processing such as casting and rolling. The furnace fume hood door is mainly used to assist in the feeding process. The fume hood door needs to be opened when feeding is completed, and the furnace door needs to be kept closed after feeding is completed. Most existing fume hood doors adopt a wire rope pull structure.

[0003] Currently, most manufacturers use a wire rope pull-out structure for the opening of the furnace hoods. However, this structure is prone to slippage when the hood door deforms due to heat, leading to improper opening and closing of the furnace door and potentially causing safety accidents. Furthermore, the melting furnace generates a large amount of high-temperature flue gas containing dust, harmful gases, and other pollutants during operation. Improper opening and closing of the hood door can also result in uncontrolled emissions of this flue gas, causing air pollution in the workshop and harming the health of workers.

[0004] Therefore, the above problems urgently need to be solved. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a door opening structure for a melting furnace fume hood, which uses a chain to replace the traditional steel wire rope, thereby improving the adaptability to harsh environments and increasing transmission efficiency; at the same time, a friction sprocket structure is designed to achieve a redundant design for door opening limit, protecting the melting furnace fume hood from damage.

[0006] Technical Solution: To achieve the above objectives, this utility model provides a furnace fume hood opening structure, comprising: a fume hood body, a fume hood door, and an opening assembly; the fume hood body has an opening on one side; both the upper and lower ends of the opening side of the fume hood body are provided with moving guide rails; the fume hood door is disposed on the moving guide rails; the opening assembly is disposed beside the opening surface of the fume hood body and below the fume hood door; the opening assembly includes a reducer bracket, a reducer, a friction sprocket, and a chain; the reducer bracket is disposed at the lower end of the opening side of the fume hood body; the reducer is disposed on the reducer bracket; the friction sprocket is disposed on the reducer bracket and connected to the output end of the reducer; the chain is disposed between the fume hood door and the moving guide rail at the lower end of the opening side of the fume hood body, and its tail is connected to the friction sprocket. The friction sprocket and chain drive can maintain an accurate average transmission ratio. Compared with wire rope drive, chain drive has a larger load-bearing capacity and can transmit more power, further improving the performance of the equipment under high-load working conditions. At the same time, the friction sprocket is driven to rotate by the reducer, which in turn drives the chain to move, realizing the automatic opening and closing of the fume hood door. This avoids the unstable operation of opening and closing the fume hood door using wire rope and improves the safety of use.

[0007] Furthermore, the friction sprocket includes a sprocket seat, a sprocket, a set of friction plates, a clamping block, a wing washer, and a locking nut. The sprocket seat is mounted on the reducer bracket and connected to the reducer output end. An annular support surface is provided on one side of the sprocket seat. From the annular support surface to the other side, the sprocket seat is sequentially provided with friction plates, a sprocket, friction plates, a clamping block, a wing washer, and a locking nut. When the force on the sprocket exceeds the frictional force provided by the friction plates on both sides, it will idle, thus protecting the entire melting furnace hood from damage. Simultaneously, the structure of the chain and sprocket is relatively simple, and the various components of the friction sprocket are easy to disassemble and inspect. When maintenance is required, worn parts can be quickly replaced, reducing maintenance time and costs.

[0008] Furthermore, the clamping block has a butterfly-shaped washer mounting surface on its circumferential side away from the sprocket; the butterfly-shaped washer mates with the butterfly-shaped washer mounting surface to complete the installation. When subjected to impact loads, the butterfly-shaped washer can buffer the impact through its own elastic deformation, reducing the direct impact force on the clamping block and friction plate, and improving the impact resistance of the entire friction sprocket system.

[0009] Furthermore, a set of tension sprockets is provided on both sides of the friction sprocket; the tension sprockets mesh with the chain. By meshing with the chain, the tension sprockets effectively prevent the chain from loosening and vibrating due to excessive sag, greatly improving the smoothness and reliability of the transmission.

[0010] Furthermore, the reducer bracket is also equipped with limit switches. The limit switches provide signals for the reducer to rotate forward and backward, as well as to start and stop, ensuring stable operation of the equipment.

[0011] Furthermore, a limit block is provided on the side of the fume hood door away from the door assembly. The limit block, in conjunction with a limit switch, controls the forward and reverse rotation of the reducer and the timing of its start and stop, preventing damage to the equipment.

[0012] Furthermore, several guide wheels are provided between the fume hood door and the upper part of the moving guide rail on the opening side of the fume hood body. The guide wheels provide guidance for the movement of the fume hood door along the moving guide rail, ensuring the reliability and stability of the movement.

[0013] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0014] 1. This utility model provides a furnace fume hood opening structure that uses chains instead of traditional steel wire ropes, improving adaptability to harsh environments and increasing transmission efficiency.

[0015] 2. This utility model discloses a door opening structure for a melting furnace fume hood. It incorporates a friction sprocket design, which, through a set of friction plates in conjunction with the sprocket, achieves a redundant design for door opening limit, thus protecting the entire melting furnace fume hood from damage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the opening structure of a melting furnace fume hood according to the present invention;

[0017] Figure 2 This is a schematic diagram of the opening component in the opening structure of the furnace fume hood of the present invention;

[0018] Figure 3 This is a side view of the friction sprocket in the door opening structure of a melting furnace fume hood according to the present invention;

[0019] Figure 4 for Figure 3 AA-direction cross section;

[0020] Figure 5 This is a schematic diagram of the fume hood door after it is opened in the fume hood opening structure of the melting furnace described in this utility model;

[0021] In the picture:

[0022] 1-Main body of the fume hood;

[0023] 2-Moving guide rail;

[0024] 3-Fog hood door; 31-Limit block;

[0025] 4-Door opening assembly; 41-Reducer bracket; 42-Reducer; 43-Friction sprocket; 44-Chain; 45-Tension sprocket; 46-Limit switch;

[0026] 431-Sprocket seat; 432-Sprocket; 433-Friction plate; 434-Clamping block; 435-Butterfly washer; 436-Locking nut; 4311-Annular support surface; 4341-Butterfly washer mounting surface;

[0027] 5-Guide wheel. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. Example

[0029] In this embodiment, as Figure 1 and Figure 2 This utility model discloses a door opening structure for a melting furnace fume hood, comprising: a fume hood body 1, a fume hood door 3, and a door opening assembly 4; the fume hood body 1 has an opening on one side; both the upper and lower ends of the opening side of the fume hood body 1 are provided with moving guide rails 2; the fume hood door 3 is disposed on the moving guide rails 2; the door opening assembly 4 is disposed beside the opening surface of the fume hood body 1 and below the fume hood door 3; the door opening assembly 4 includes a reducer bracket 41, a reducer 42, a friction sprocket 43, and a chain 44; the reducer bracket 41 is disposed at the lower end of the opening side of the fume hood body 1; the reducer 42 is disposed on the reducer bracket 41; the friction sprocket 43 is disposed on the reducer bracket 41 and connected to the output end of the reducer 42; the chain 44 is disposed between the fume hood door 3 and the moving guide rail 2 at the lower end of the opening side of the fume hood body 1, and its tail is connected to the friction sprocket 43.

[0030] Specifically, the reducer 42 controls the friction sprocket 43 to drive the chain 44 to move by rotating forward and backward, thereby realizing the opening and closing of the fume hood door 3.

[0031] Specifically, it is preferable to add a sealing strip and a buffer device at the contact point between the fume hood door 3 and the fume hood body 1. The sealing strip can effectively prevent smoke leakage and improve the sealing performance of the fume hood; the buffer device can reduce the impact force when the fume hood door is closed and protect the fume hood door 3 and the fume hood body 1.

[0032] In this embodiment, as Figure 3 and Figure 4The friction sprocket 43 includes a sprocket seat 431, a sprocket 432, a set of friction plates 433, a clamping block 434, a butterfly washer 435, and a locking nut 436. The sprocket seat 431 is mounted on the reducer bracket 41 and is connected to the output end of the reducer 42. An annular support surface 4311 is provided on one side of the sprocket seat 431. The friction plates 433, sprocket 432, friction plates 433, clamping block 434, butterfly washer 435, and locking nut 436 are arranged sequentially from the annular support surface 4311 to the other side on the sprocket seat 431.

[0033] Specifically, by adjusting the locking nut 436 and the butterfly washer 435, the clamping force of the friction plate 433 can be adjusted to adapt to different working conditions and load requirements, thereby improving the versatility and flexibility of the friction sprocket 43.

[0034] In particular, a wear-resistant coating, such as a tungsten carbide coating, can be added to the surface of the friction plate 433 to improve the wear resistance and service life of the friction plate 433.

[0035] In this embodiment, as Figure 3 and Figure 4 The clamping block 434 has a butterfly-shaped gasket mounting surface 4341 on its circumferential side away from the sprocket 432; the butterfly-shaped gasket 435 cooperates with the butterfly-shaped gasket mounting surface 4341 to complete the installation.

[0036] In particular, the butterfly gasket mounting surface 4341 can be designed as a spherical shape as an optional preference, so that the butterfly gasket 435 can better fit the butterfly gasket mounting surface 4341 and improve stability.

[0037] In this embodiment, as Figure 1 and Figure 2 The friction sprocket 43 is provided with a set of tension sprockets 45 on both sides; the tension sprockets 45 are engaged with the chain 44.

[0038] Specifically, the chain 44 is preferably designed with a guide wing, which makes it easier for the chain 44 to stay on the correct track during operation and reduces jumping; at the same time, the chain 4 at the lower end of the fume hood door 3 is tensioned in conjunction with the tension sprocket 7.

[0039] In this embodiment, as Figure 1 and Figure 2 The reducer bracket 41 is also equipped with a limit switch 46.

[0040] In this embodiment, as Figure 1 The smoke hood door 3 is provided with a limiting block 31 on the side away from the door assembly 4.

[0041] Specifically, such as Figure 5When the fume hood door 3 is fully opened, the limit block 31 abuts against the side of the limit switch 46. The limit switch 46 senses the limit block 31 and at this time controls the reducer 42 to stop driving.

[0042] Specifically, such as Figure 5 A buffer block can be added next to the limit switch 46. When the fume hood door 3 is fully opened, the added buffer block can effectively protect the limit switch 46 and prevent it from being affected by the impact of the limit block 31, thus affecting its service life.

[0043] In this embodiment, as Figure 1 A number of guide wheels 5 are provided between the smoke hood door 3 and the moving guide rail 2 at the upper end of the opening side of the smoke hood body 1.

[0044] Specifically, it is preferable to add a buffer component, such as a rubber buffer or a spring buffer, to the guide wheel 5 to absorb the impact force when the fume hood door 3 is closed, reduce collision noise, and protect the service life of the guide wheel 5 and the moving guide rail 2.

[0045] The working principle of the above embodiments is as follows:

[0046] This utility model discloses a furnace fume hood opening structure. When the fume hood door 3 is normally opened and closed, the reducer 42 drives the sprocket seat 431 of the friction sprocket 43 to rotate forward or backward. The friction plate 433 provides friction to drive the sprocket 432 to rotate, thereby driving the chain 44 to move the fume hood door 3 along the moving guide rail 2. At this time, the guide wheel 5 assists in guiding.

[0047] When the limit switch 46 senses the limit block 31, the reducer 42 stops completing the door opening operation; if the limit switch 46 fails, since the limit block 31 is against the side of the limit switch 46, the reducer 42 continues to drive the friction sprocket 43, causing the driving force on the sprocket seat 431 to be greater than the friction force provided by the friction plate 433 to the sprocket 432, and the sprocket 432 will spin freely, thereby protecting the entire door opening structure.

[0048] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A melting furnace hood door opening structure characterized by: include: The smoke hood body (1) has an opening on one side; the smoke hood body (1) has movable guide rails (2) at both the upper and lower ends of the opening side. The smoke hood door (3) is mounted on the moving guide rail (2); Door opening assembly (4), the door opening assembly (4) is located on the side of the opening surface of the smoke hood body (1) and below the smoke hood door (3); The door opening assembly (4) includes a speed reducer bracket (41), a speed reducer (42), a friction sprocket (43), and a chain (44); the speed reducer bracket (41) is located at the lower end of the opening side of the hood body (1); the speed reducer (42) is located on the speed reducer bracket (41); the friction sprocket (43) is located on the speed reducer bracket (41) and connected to the output end of the speed reducer (42); the chain (44) is located between the hood door (3) and the moving guide rail (2) at the lower end of the opening side of the hood body (1), and its tail is connected to the friction sprocket (43).

2. The melting furnace hood door opening structure according to claim 1, characterized by: The friction sprocket (43) includes a sprocket seat (431), a sprocket (432), a set of friction plates (433), a clamping block (434), a butterfly washer (435), and a locking nut (436). The sprocket seat (431) is mounted on the reducer bracket (41) and connected to the output end of the reducer (42); one side of the sprocket seat (431) is provided with an annular support surface (4311); the sprocket seat (431) is provided with a friction plate (433), a sprocket (432), a friction plate (433), a clamping block (434), a butterfly washer (435) and a locking nut (436) in sequence from the annular support surface (4311) to the other side.

3. The melting furnace hood door opening structure according to claim 2, characterized by: The clamping block (434) has a butterfly-shaped gasket mounting surface (4341) on its periphery away from the sprocket (432); the butterfly-shaped gasket (435) cooperates with the butterfly-shaped gasket mounting surface (4341) to complete the installation.

4. The furnace fume hood opening structure according to claim 1, characterized in that: The friction sprocket (43) has a set of tension sprockets (45) on both sides; the tension sprockets (45) mesh with the chain (44).

5. The furnace fume hood opening structure according to claim 1, characterized in that: The reducer bracket (41) is also equipped with a limit switch (46).

6. The furnace fume hood opening structure according to claim 5, characterized in that: The smoke hood door (3) is provided with a limiting block (31) on the side away from the door assembly (4).

7. The furnace fume hood opening structure according to claim 1, characterized in that: Several guide wheels (5) are provided between the smoke hood door (3) and the moving guide rail (2) at the upper end of the opening side of the smoke hood body (1).

Images