An automatic protection device for furnace bottom

Abstract

The present invention discloses an automatic protection device for the bottom of a furnace mouth, comprising a furnace door, a furnace door body is arranged at the upper side of the furnace door, a furnace door bottom platform is arranged at the lower side of the furnace door, a guide rail is fixedly connected to the outer side of the furnace door bottom platform, a trolley body is slidably arranged on the guide rail, the trolley body is composed of a trolley platform and a trolley chassis, the upper surface of the trolley platform is flush with the upper surface of the furnace door bottom platform, the lower side connecting rollers of the trolley chassis are correspondingly arranged on the guide rail, both sides of the trolley chassis are rotatably connected with connecting rods, and the other end of the connecting rod is rotatably connected to the left and right sides of the front surface of the furnace door body. In the present invention, the trolley obtains horizontal reciprocating motion traction through the lifting power of the furnace door, the trolley and the furnace door realize position interlocking and motion synchronization through the left and right connecting rods, the furnace door is opened to complete the automatic protection of the furnace door bottom by the trolley, and the reliable sealing time of the furnace door and the furnace door bottom is extended.

Description

Technical Field

[0001] The invention relates to the field of industrial furnaces, and in particular to an automatic protection device for the bottom of a furnace opening. Background Art

[0002] The technological progress of industrial furnaces plays a very important role in the development of industry. However, the sealing problem of the furnace door and furnace mouth of industrial furnaces, especially high-temperature heating gas furnaces, has always been a difficult problem that has plagued the industry.

[0003] The bottom of the furnace mouth of an industrial furnace, especially the bottom of the furnace mouth at the discharge port, is generally cast with refractory castables. The bottom of the furnace mouth is prone to wear and bumping during loading and unloading, causing damage to the sealing surface of the bottom of the furnace mouth. Once the furnace door and the furnace mouth are not sealed tightly, air leakage and fire leakage will occur, which will quickly lead to the burning and failure of the sealing materials of the furnace door and the furnace mouth, causing great economic losses. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an automatic protection device for the bottom of a furnace opening.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an automatic protection device for the bottom of a furnace mouth, comprising a furnace door, a furnace door body is arranged at the upper side of the furnace door, a lifting mechanism is connected to the furnace door body, a furnace door bottom platform is arranged at the lower side of the furnace door, a guide rail is fixedly connected to the outer side of the furnace door bottom platform, a material trolley body is slidably arranged on the guide rail, the material trolley body is composed of a material trolley platform and a material trolley chassis, the upper surface of the material trolley platform is flush with the upper surface of the furnace door bottom platform, the lower side connecting rollers of the material trolley chassis are arranged on the guide rails, and connecting rods are rotatably connected to both sides of the front surface of the furnace door body, and the other end of the connecting rod is rotatably connected to the left and right sides of the front surface of the furnace door body.

[0006] As a further description of the above technical solution:

[0007] The four corners of the upper surface of the chassis of the material cart are fixedly connected with screw rods, and the upper ends of the screw rods are connected with first nuts and second nuts. The plate body of the material cart platform is correspondingly inserted on the screw rods, and the first nuts and second nuts are correspondingly crimped on the upper and lower surfaces of the material cart platform.

[0008] As a further description of the above technical solution:

[0009] The four corners of the lower surface of the chassis of the material cart are rotatably connected to the first rotating shaft through a wheel seat, the shaft body of the first rotating shaft is fixedly connected to a bearing, a third retaining ring is arranged on the side of the shaft body of the first rotating shaft corresponding to the bearing, the roller is correspondingly sleeved on the bearing, and a second retaining ring is arranged between the roller and the bearing.

[0010] As a further description of the above technical solution:

[0011] One end of the connecting rod connected to the chassis of the material cart is fixedly connected to a second hinge, and the second hinge is correspondingly sleeved on the shaft body of the first rotating shaft. A spacer is arranged on the outer side of the shaft body of the first rotating shaft corresponding to the second hinge, and a fourth retaining ring is arranged on the outer side of the spacer.

[0012] As a further description of the above technical solution:

[0013] One end of the connecting rod connected to the furnace door body is fixedly connected to the first hinge, and the side surface of the furnace door body is correspondingly provided with a second rotating shaft, the second rotating shaft is fixedly connected to a hinge seat, the first hinge is correspondingly connected to the hinge seat, and first retaining rings are connected to both sides of the second rotating shaft.

[0014] As a further description of the above technical solution:

[0015] A photoelectric travel switch is correspondingly arranged on one side of the furnace mouth bottom platform, a protective cover is arranged on the outer side of the photoelectric travel switch, and a travel adjustment bolt is correspondingly arranged on the lower surface of the material car body.

[0016] The present invention has the following beneficial effects:

[0017] 1. The feed trolley of the present invention obtains horizontal reciprocating traction through the lifting power of the furnace door. The feed trolley and the furnace door are interlocked and synchronized in movement through two left and right connecting rods. When the furnace door is opened, the feed trolley automatically protects the bottom of the furnace mouth, and the reliable sealing time between the furnace door and the bottom of the furnace mouth is extended.

[0018] 2. The material cart of the present invention is divided into two parts, the upper and lower parts, and the height direction of the material cart platform can be adjusted to compensate for the height drop of the upper plane of the bottom of the furnace mouth caused by wear of the bottom of the furnace mouth. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of an automatic protection device for the bottom of a furnace opening;

[0020] Figure 2 A side cross-sectional view of an automatic protection device for the bottom of a furnace opening when the furnace door is opened;

[0021] Figure 3 The present invention is a side cross-sectional view of a furnace door of an automatic protection device for the bottom of a furnace opening when the furnace door is closed.

[0022] Legend:

[0023] 1. The first rotating shaft; 2. The wheel seat; 3. The roller; 4. The screw; 5. The first nut; 6. The second nut; 7. The protective cover; 8. The first retaining ring; 9. The hinge seat; 10. The second rotating shaft; 11. The furnace door; 12. The photoelectric travel switch; 13. The material trolley platform; 14. The travel adjustment bolt; 15. The material trolley chassis; 16. The bearing; 17. The second retaining ring; 18. The third retaining ring; 19. The fourth retaining ring; 20. The spacer; 22. The furnace door bottom platform; 23. The furnace door body; 24. The first hinge; 25. The connecting rod; 26. The material trolley body; 27. The second hinge; 28. The guide rail. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Reference Figure 1-3An embodiment of the present invention provides: an automatic protection device for the bottom of a furnace mouth, comprising a furnace door 11, providing a furnace body mouth structure, a furnace door body 23 is arranged on the upper side of the furnace door 11, which is a furnace door structure, and the furnace door body 23 is connected with a lifting mechanism to ensure that the furnace door can be lifted up and down, and a furnace mouth bottom platform 22 is arranged on the lower side of the furnace door 11, which is a main structure of the bottom of the furnace mouth, and a guide rail 28 is fixedly connected to the outer side of the furnace mouth bottom platform 22 to provide guidance for the material car, and a material car body 26 is slidably arranged on the guide rail 28 to provide workpiece conveying The vehicle body, the main body 26 of the material cart is composed of a material cart platform 13 and a material cart chassis 15, which provides a prerequisite for the adjustment of the material cart platform 13. The upper surface of the material cart platform 13 is flush with the upper surface of the furnace mouth bottom platform 22 to ensure plane connection. The lower side connecting roller 3 of the material cart chassis 15 is correspondingly arranged on the guide rail 28 to realize directional movement. Both sides of the material cart chassis 15 are rotatably connected with connecting rods 25, and the other end of the connecting rod 25 is rotatably connected to the left and right sides of the front surface of the furnace door main body 23. The reciprocating movement of the material cart main body 26 is realized by the lifting and lowering of the furnace door main body 23.

[0027] The four corners of the upper surface of the material cart chassis 15 are fixedly connected with a screw rod 4, and the upper end of the screw rod 4 is connected with a first nut 5 and a second nut 6. The plate body of the material cart platform 13 is correspondingly inserted on the screw rod 4, and the first nut 5 and the second nut 6 are correspondingly pressed on the upper and lower surfaces of the material cart platform 13. By adjusting the position of the first nut 5 and the second nut 6, the height adjustment of the material cart platform 13 can be achieved. The four corners of the lower surface of the material cart chassis 15 are rotatably connected with the first shaft 1 through the wheel seat 2, providing the roller 3 The shaft of the first rotating shaft 1 is fixedly connected with a bearing 16 to reduce the rotational friction. The shaft of the first rotating shaft 1 is provided with a third retaining ring 18 at the side of the shaft corresponding to the bearing 16. The roller 3 is correspondingly sleeved on the bearing 16. A second retaining ring 17 is provided between the roller 3 and the bearing 16 to fix the position of the bearing 16. The connecting rod 25 is connected to one end of the chassis 15 of the material cart and is fixedly connected with a second hinge 27 to provide a corresponding rotational connection. The second hinge 27 is correspondingly sleeved on the shaft of the first rotating shaft 1. A spacer sleeve 20 is provided on the outer side of the second hinge 27 corresponding to the shaft body of the shaft 1, and a fourth retaining ring 19 is provided on the outer side of the spacer sleeve 20. The second hinge 27 is limited by the action of the spacer sleeve 20, and the spacer sleeve 20 is limited by the action of the first retaining ring 19. One end of the connecting rod 25 connected to the furnace door body 23 is fixedly connected to the first hinge 24 to provide a corresponding rotational connection. A second rotating shaft 10 is correspondingly provided on the side surface of the furnace door body 23 to provide a rotational connection shaft. A hinge seat 9 is fixedly connected to the second rotating shaft 10, and the first hinge 24 is correspondingly connected to the hinge seat 9 to achieve a corresponding rotational connection. Both sides of the second rotating shaft 10 are connected with the first retaining ring 8 to achieve limitation on both sides and ensure the stability of the transfer position. A photoelectric travel switch 12 is correspondingly provided on one side of the furnace mouth bottom platform 22, and a protective cover 7 is provided on the outer side of the photoelectric travel switch 12. A travel adjustment bolt 14 is correspondingly provided on the lower surface of the material car body 26, and automatic control operation is achieved through the cooperation of the travel adjustment bolt 14 and the photoelectric travel switch 12.

[0028] Working principle: The device is a double-slider structure of a connecting rod 25, and uses the lifting power and stroke of the slider A (furnace door body 23) to complete the horizontal reciprocating movement of the slider B (material trolley body 26) to realize automatic protection of the furnace mouth bottom platform 22. When the furnace door body 23 rises from the lower limit position, the furnace door body 23 pulls the material trolley 26 through the first hinge 24, the connecting rod 25, and the second hinge 27 to gradually reduce the gap between the furnace door 11. When the stroke adjustment bolt 14 on the material trolley body 26 is close to the photoelectric stroke switch 12, the material trolley body 26 is close to the furnace mouth bottom platform 22, and the furnace door body 23 is in the maximum open state. The upper plane of the material trolley platform 13 is flush with the upper plane of the furnace mouth bottom platform 22. The workpiece that has reached the initial forging temperature slides safely from the upper plane of the furnace mouth bottom platform 22 to the upper plane of the material trolley platform 13. According to the discharge rhythm of the workpiece, continuous discharge or Intermittent discharging. During continuous discharging, the furnace door body 23 is opened once, the material cart body 26 reciprocates once, and the workpiece is discharged multiple times. During intermittent discharging, the furnace door body 23 is opened once, the material cart body 26 reciprocates once, and the workpiece is discharged once. When discharging, the furnace door body 23 can be closed after the workpiece is taken away from the material cart body 26, or the workpiece can be taken away from the material cart body 26 after the furnace door body 23 is closed. When the furnace door body 23 descends, the gap between the material cart body 26 and the furnace door 11 gradually increases until the furnace door 11 and the furnace door body 23 are in a sealed state. The power for the material cart body 26 to make reciprocating motion along the horizontal guide rail 28 comes from the furnace door body 23, the power when the material cart body 26 gradually approaches the furnace door 11 comes from the lifting pulling force of the furnace door body 23, and the power when the material cart body 26 gradually moves away from the furnace door 11 comes from the gravity of the furnace door body 23.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic protection device for the bottom of a furnace opening, comprising a furnace opening (11), characterized in that: A furnace door body (23) is arranged at the upper side of the furnace door opening (11), and a lifting mechanism is correspondingly connected to the furnace door body (23); a furnace door bottom platform (22) is arranged at the lower side of the furnace door opening (11), and a guide rail (28) is fixedly connected to the outer side of the furnace door bottom platform (22), and a trolley body (26) is slidably arranged on the guide rail (28); the trolley body (26) is composed of a trolley platform (13) and a trolley chassis (15); the upper surface of the trolley platform (13) is flush with the upper surface of the furnace door bottom platform (22), and the lower side connecting rollers (3) of the trolley chassis (15) are correspondingly arranged on the guide rail (28); both sides of the trolley chassis (15) are rotatably connected to connecting rods (25), and the other ends of the connecting rods (25) are rotatably connected to the left and right sides of the front surface of the furnace door body (23); The four corners of the lower surface of the material cart chassis (15) are rotatably connected to a first rotating shaft (1) via a wheel seat (2); the shaft body of the first rotating shaft (1) is fixedly connected to a bearing (16); a third retaining ring (18) is provided on the shaft body of the first rotating shaft (1) at a side position corresponding to the bearing (16); the roller (3) is correspondingly sleeved on the bearing (16); and a second retaining ring (17) is provided between the roller (3) and the bearing (16); One end of the connecting rod (25) connected to the chassis (15) of the material cart is fixedly connected to a second hinge (27); the second hinge (27) is correspondingly sleeved on the shaft body of the first rotating shaft (1); a spacer sleeve (20) is provided on the outer side of the shaft body of the first rotating shaft (1) corresponding to the second hinge (27); a fourth retaining ring (19) is provided on the outer side of the spacer sleeve (20); One end of the connecting rod (25) connected to the furnace door body (23) is fixedly connected to a first hinge (24); a second rotating shaft (10) is correspondingly provided on the side surface of the furnace door body (23); a hinge seat (9) is fixedly connected to the second rotating shaft (10); the first hinge (24) is correspondingly connected to the hinge seat (9); and first retaining rings (8) are connected to both sides of the second rotating shaft (10); A photoelectric travel switch (12) is correspondingly arranged on one side of the furnace mouth bottom platform (22), a protective cover (7) is arranged on the outer side of the photoelectric travel switch (12), and a travel adjustment bolt (14) is correspondingly arranged on the lower surface of the material cart body (26).

2. The automatic protection device for the bottom of a furnace opening according to claim 1, characterized in that: The four corners of the upper surface of the material cart chassis (15) are fixedly connected to a screw rod (4), the upper end of the screw rod (4) is connected to a first nut (5) and a second nut (6), the plate body of the material cart platform (13) is correspondingly inserted on the screw rod (4), and the first nut (5) and the second nut (6) are correspondingly crimped on the upper and lower surfaces of the material cart platform (13).

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