Furnace door opening and closing device of aluminum bar extrusion hot shear furnace

Abstract

A furnace door is arranged at one end of the hot shear furnace, an air cylinder is arranged at the top end of the hot shear furnace and comprises a piston rod, and the piston rod is connected with the furnace door. According to the furnace door opening and closing device of the aluminum bar extrusion hot shear furnace, the furnace door can be closed in time, energy loss is reduced, and normal production is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of furnace door devices. Specifically, the utility model relates to a furnace door opening and closing device for an aluminum bar extrusion hot shearing furnace. Background Art

[0002] When the aluminum bar is conveyed into the hot shearing furnace on the bar rack, in order to reduce heat loss, it is required that the worker close the furnace door of the bar inlet in time after feeding the bar. At present, the furnace door is manually closed by a manual machine table. Due to the large randomness of manual operation, the furnace door often cannot be closed in time, and it is necessary for the management personnel to supervise and implement, resulting in an increase in management costs and a waste of natural gas energy. If the furnace door is closed too early, the pushing rod cannot withdraw in time, which will cause the furnace door and the pushing rod to be stuck, and the furnace door cannot be completely closed, resulting in production abnormalities and equipment damage.

[0003] The utility model patent with the publication number of CN210602806U discloses a hermetic furnace door device for a hot shearing furnace on May 22, 2020, which includes a furnace body. One side of the furnace body is provided with a furnace body port. A first sealing plate is slidably installed at the top of the furnace body port. Second sealing plates are slidably installed on both sides of the furnace body port. Sealing blocks are provided on the side where the two second sealing plates are close to each other and the bottom of the first sealing plate. Transmission blocks are fixedly installed on the sides where the two second sealing plates are away from each other. Two spring blocks are fixedly installed on the top of the transmission block. This hermetic furnace door device for a hot shearing furnace cannot control the opening and closing of the furnace door and cannot reduce energy loss. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a furnace door opening and closing device for an aluminum bar extrusion hot shearing furnace that can close the furnace door in time, reduce energy loss, and ensure normal production in view of the deficiencies of the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] For this furnace door opening and closing device for an aluminum bar extrusion hot shearing furnace, the furnace door is arranged at one end of the hot shearing furnace. A cylinder is provided at the top of the hot shearing furnace. The cylinder includes a piston rod, and the piston rod is connected to the furnace door; the cylinder is connected with an electromagnetic valve. A bar rack is arranged on one side of the furnace door. A pushing rod is arranged on the bar rack. A travel switch is arranged at one end of the bar rack.

[0007] A bracket is provided at the end of the hot shearing furnace. A sprocket is rotatably connected to the bracket. A chain is connected between the piston rod and the furnace door. The sprocket cooperates with the chain.

[0008] A protective cover is arranged outside the furnace door. An opening is provided at the bottom end of the protective cover. The opening is at the same height as the bar rack. The protective cover is bolted to the hot shearing furnace.

[0009] The conveying rollers are equidistantly arranged on the rod rack, and the middle part of the conveying roller is of an arc structure.

[0010] Fixed seats are arranged at both ends of the cylinder, and the fixed seats are of an L-shaped structure.

[0011] An I-beam is arranged at the bottom of the cylinder.

[0012] A control box is arranged on the side of the hot shearing furnace.

[0013] The technical effect of the present utility model is as follows: By adopting the opening and closing device for the furnace door of the aluminum rod extrusion hot shearing furnace of the present utility model, by installing a travel switch on the rod rack, utilizing the signal transmission and control functions of the solenoid valve, and driven by the cylinder and under the transmission action of the chain drive, the opening and closing control of the furnace door is realized, ensuring that the furnace door can be closed in time after the aluminum rod is fed, reducing the energy consumption and loss of the hot shearing furnace, and at the same time ensuring that the push rod can be withdrawn in time, preventing the situation of the push rod being stuck, ensuring the normal progress of production, effectively reducing the management cost, and improving the operation efficiency of employees. The device has a simple structure and can be refitted and used on the existing manual extrusion hot shearing furnace model, adding the function of automatically closing the furnace door on the basis of maintaining the existing manual closing. Description of the Drawings

[0014] This specification includes the following drawings, and the shown contents are respectively:

[0015] Figure 1 It is a schematic structural diagram of the opening and closing device for the furnace door of the aluminum rod extrusion hot shearing furnace of the present utility model;

[0016] Figure 2 It is a schematic structural diagram of the protective cover of the present utility model;

[0017] Figure 3 It is a schematic structural diagram of the conveying roller of the present utility model;

[0018] Figure 4 It is Figure 1 A partial enlarged view of the protective cover part in

[0019] The marks in the figure are: 1, hot shearing furnace; 2, furnace door; 3, cylinder; 4, piston rod; 5, rod rack; 6, push rod; 7, solenoid valve; 8, travel switch; 9, bracket; 10, sprocket; 11, chain; 12, protective cover; 13, opening; 14, conveying roller; 15, I-beam; 16, fixed seat; 17, control box. Detailed Description of the Preferred Embodiments

[0020] The following is a further detailed description of the specific embodiments of the present utility model by describing the embodiments with reference to the drawings, aiming to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and contribute to its implementation.

[0021] As shown Figures 1 to 4 in the figure, for the opening and closing device of the furnace door of the aluminum bar extrusion hot shearing furnace, the furnace door 2 is arranged at one end of the hot shearing furnace 1, a cylinder 3 is arranged at the top of the hot shearing furnace 1, the cylinder 3 includes a piston rod 4, and the piston rod 4 is connected to the furnace door 2; the cylinder 3 is connected with a solenoid valve 7, a rod holder 5 is arranged on one side of the furnace door 2, a push rod 6 is arranged on the rod holder 5, and a travel switch 8 is arranged at one end of the rod holder 5. The travel switch 8 is installed on the rod holder 5, the solenoid valve 7 is controlled by the travel switch 8, the cylinder 3 is controlled by the solenoid valve 7, and the opening and closing of the furnace door 2 are realized by the telescopic movement of the cylinder 3 to pull the chain 11. After the aluminum bar completely enters the hot shearing furnace 1, the push rod 6 will touch the travel switch 8 during its return stroke. The travel switch 8 gives a signal to the solenoid valve 7. The on-off of the solenoid valve 7 controls the telescopic movement of the cylinder 3. The piston rod 4 is connected to the furnace door 2 through the chain 11 and the sprocket 10, realizing the closing of the furnace door 2, that is, achieving the function of timely closing of the furnace door 2, and the push rod 6 also exits from the hot shearing furnace 1 in time.

[0022] As shown Figure 1 in the figure, a bracket 9 is arranged at the end of the hot shearing furnace 1, a sprocket 10 is rotatably connected to the bracket 9, and a chain 11 is connected between the piston rod 4 and the furnace door 2, and the sprocket 10 is matched with the chain 11. The sprocket 10 and the chain 11 are used for cooperative transmission. Due to its characteristics of accurate transmission ratio, high efficiency, and large transmission power, the furnace door 2 can be accurately lifted through the action of the cylinder 3, and at the same time, there will be no sliding and slipping phenomena, the work is more reliable, and it can also adapt to the high-temperature working environment of the hot shearing furnace 1.

[0023] As shown Figure 1 and Figure 2 in the figure, a protective cover 12 is arranged outside the furnace door 2, an opening 13 is arranged at the bottom end of the protective cover 12, and the opening 13 is at the same height as the rod holder 5. The protective cover 12 is bolted to the hot shearing furnace 1. The protective cover 12 is used to reduce the heat loss when the furnace door 2 is opened, reduce the energy consumption, and also reduce the temperature of the external environment of the hot shearing furnace 1, which is beneficial to maintaining a suitable and good working environment. The opening 13 corresponds to the aluminum bar and is in a U-shaped structure, which is convenient for the aluminum bar to pass through without obstruction and avoids the movement interference of the aluminum bar.

[0024] As shown Figure 1 and Figure 3 in the figure, conveying rollers 14 are arranged at equal intervals on the rod holder 5, and the middle part of the conveying roller 14 is in an arc structure. The conveying roller 14 is a roller body structure with a large diameter at both ends and a small diameter in the middle, and its middle part has an arc transition. The conveying roller 14 with the above structure makes the transfer process of the aluminum bar more stable and will not have radial shaking, so that the aluminum bar can accurately enter the opening 13 of the furnace door 2 under the pushing action of the push rod 6.

[0025] As shown Figure 1As shown in the figure, fixed seats 16 are provided at both ends of the cylinder 3. The fixed seats 16 are of an L-shaped structure. Two fixed seats 16 are arranged at both ends of the cylinder 3 and are connected to the I-beam 15 with bolts to further improve the installation stability of the cylinder 3.

[0026] As Figure 1 shown in the figure, an I-beam 15 is provided at the bottom of the cylinder 3. The I-beam 15 supports the cylinder 3. The I-beam 15 has high strength and is not easily deformed, which is beneficial to keeping the piston rod 4 moving horizontally for a long time and ensuring the reliability of the opening and closing process of the furnace door 2.

[0027] As Figure 1 shown in the figure, a control box 17 is provided on the side of the hot shearing furnace 1. The control box 17 can be used to manually open and close the furnace door 2. When the process is adjusted or production is abnormal, the control box 17 can be used to manually adjust the actions of the cylinder 3 and the push rod 6.

[0028] Attention should be paid during the installation of this device: at the position where the push rod 6 on the rod rack 5 touches the travel switch 8 during its return stroke, it must be ensured that the push rod 6 has withdrawn from the furnace door 2 and the furnace door 2 can be fully closed, otherwise it will cause damage to the equipment; the power of the cylinder 3 is compressed air, and its compressed air pressure must match the weights of the cylinder 3 and the furnace door 2, generally 0.5 - 0.7 mpa.

[0029] The operation process is as follows: The aluminum rod is placed on the rod rack 5 and supported by the conveyor roller 14. The push rod 6 in the initial position will contact the travel switch 8. At this time, the furnace door 2 is in the closed state. After the equipment is started, the push rod 6 runs and disengages from the travel switch 8. The travel switch 8 sends a signal to the solenoid valve 7. The solenoid valve 7 controls and drives the cylinder 3 to open the furnace door 2. The push rod 6 runs to push the aluminum rod along the rod rack 5 into the hot shearing furnace 1. Subsequently, during the return stroke of the push rod 6, it will contact the travel switch 8. At this time, the push rod 6 has completed withdrawing from the hot shearing furnace 1. The travel switch 8 sends a signal to the solenoid valve 7. The solenoid valve 7 controls the piston rod 4 of the cylinder 3 to reset, and the furnace door 2 closes.

[0030] The furnace door opening and closing device for the aluminum rod extrusion hot shearing furnace realizes the opening and closing control of the furnace door 2 by installing a travel switch 8 on the rod rack 5, utilizing the signal transmission and control function of the solenoid valve 7, and driving through the cylinder 3 and the transmission of the chain drive. It ensures that the furnace door 2 can be closed in time after the aluminum rod is fed, reduces the energy consumption and loss of the hot shearing furnace 1, and at the same time ensures that the push rod can withdraw in time and there will be no situation of the push rod being stuck, ensuring the normal progress of production, effectively reducing the management cost, and improving the operation efficiency of employees. This device has a simple structure and can be refitted and used on the existing manual extrusion hot shearing furnace 1 model, adding the function of automatically closing the furnace door 2 on the basis of maintaining the existing manual closing.

[0031] The above has made an exemplary description of the present utility model in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above-mentioned manner. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present utility model; or without improvement, the above-mentioned concept and technical solution of the present utility model are directly applied to other occasions, they are all within the protection scope of the present utility model.

Claims

1. An opening and closing device for the door of an aluminum bar extrusion hot shear furnace, characterized in that: The furnace door (2) is arranged at one end of the hot shear furnace (1); a cylinder (3) is arranged at the top of the hot shear furnace (1); the cylinder (3) comprises a piston rod (4); the piston rod (4) is connected to the furnace door (2); the cylinder (3) is connected to a solenoid valve (7); a rod rack (5) is arranged at one side of the furnace door (2); a push rod (6) is arranged on the rod rack (5); a travel switch (8) is arranged at one end of the rod rack (5); a protective cover (12) is arranged outside the furnace door (2); an opening (13) is arranged at the bottom end of the protective cover (12); the opening (13) is in the same height as the rod rack (5); the protective cover (12) is bolted to the hot shear furnace (1).

2. The furnace door opening and closing device of the aluminum bar extrusion hot shear furnace according to claim 1 is characterized in that: The end of the hot shear furnace (1) is provided with a bracket (9), a sprocket (10) is rotatably connected to the bracket (9), a chain (11) is connected between the piston rod (4) and the furnace door (2), and the sprocket (10) cooperates with the chain (11).

3. The furnace door opening and closing device of the aluminum bar extrusion hot shear furnace according to claim 2 is characterized in that: The rod rack (5) is provided with conveying rollers (14) at equal intervals, and the middle part of the conveying rollers (14) is an arc-shaped structure.

4. The furnace door opening and closing device of the aluminum bar extrusion hot shear furnace according to claim 3 is characterized in that: Fixed seats (16) are provided at both ends of the cylinder (3), and the fixed seats (16) are L-shaped structures.

5. The furnace door opening and closing device of the aluminum bar extrusion hot shear furnace according to claim 4 is characterized in that: An I-beam (15) is provided at the bottom of the cylinder (3).

6. The furnace door opening and closing device of the aluminum bar extrusion hot shear furnace according to any one of claims 1 to 5, characterized in that: A control box (17) is provided on the side of the hot shear furnace (1).

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