Liftable discharging device for rotary hearth furnace

Abstract

The utility model belongs to the field of rotary hearth furnaces, and particularly relates to a liftable discharging device for a rotary hearth furnace, which comprises support frames radially arranged on two sides of a hearth of the rotary hearth furnace, support rods are vertically arranged at two ends above the support frames respectively, and rotary connecting pieces are arranged on the inner sides of the tops of the two support rods respectively. The outer sides of the two rotary connecting pieces are connected with one ends of the inner sides of U-shaped lifting supports respectively, lifting assemblies are arranged on the upper portions of the ends, corresponding to the rotary connecting pieces, of the two lifting supports respectively, limiting blocks corresponding to the lifting supports are arranged on the portions, below the lifting supports, of the supporting frame respectively, and the limiting blocks limit the lifting supports. A spiral support is arranged on the upper surface of the lifting support, a bearing assembly is fixedly arranged above the spiral support and connected with the two ends of the discharging spiral, and one end of the bearing assembly is connected with a transmission assembly. The utility model solves the problems that the discharge screw needs to be replaced frequently and the reduced iron bonded on the hearth is too thick.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of rotary hearth furnace, concretely relates to a liftable discharging device for rotary hearth furnace. BACKGROUND

[0002] Rotary hearth furnace is a metallurgical engineering equipment for directly reducing iron, and its characteristics are rotary hearth and short roasting time and high degree of mechanization; when directly reducing iron by using rotary hearth furnace, iron concentrate powder and coal need to be mixed according to a certain proportion, pressed into pellets, and the pellets are uniformly spread on the hearth of the rotary hearth furnace; the rotary hearth furnace is started, the inside of the hearth is raised to about 1350 DEG C, and the hearth starts to rotate; carbon monoxide and iron oxide are formed in the heating process of the pellets; carbon monoxide releases oxygen in the iron oxide to form iron and carbon dioxide; the reduced iron is discharged to the cooling machine through the discharging device; and the iron is transported to the finished product warehouse after being cooled by the cooling machine, so that the reduced iron can be obtained.

[0003] The discharging device of the rotary hearth furnace is radially arranged on the upper surface of the hearth of the rotary hearth furnace, and the discharging device comprises a motor, a transmission chain system, a bearing seat and a discharging screw; if the temperature control is not good during the reaction of the pellets in the rotary hearth furnace, part of the reduced iron will melt and stick to the hearth; with the continuous reaction and long-term use of the rotary hearth furnace, the iron slag sticking to the hearth will become thicker and thicker, and the furnace needs to be stopped for cleaning; frequent cleaning of the iron slag on the hearth is time-consuming and laborious, and affects the production progress; in order to keep the distance between the discharging screw and the hearth bottom within a reasonable range, the blades of the discharging screw need to be replaced frequently to adjust the distance between the discharging screw and the hearth bottom; each replacement needs to stop the furnace, which slows down the production progress and is not conducive to the improvement of production efficiency.

[0004] In view of the above problems, the utility model provides a liftable discharging device for rotary hearth furnace. UTILITY MODEL CONTENTS

[0005] The utility model discloses a liftable discharging device for rotary hearth furnace, which is simple in structure, convenient to use, avoids the problem that the rotary hearth needs to clean the iron slag on the hearth frequently, and can also conveniently control the distance between the blades of the discharging screw and the hearth to keep it within a reasonable range, reducing the replacement of the blades.

[0006] The utility model discloses a technical scheme adopted is: a liftable discharging device for rotary hearth furnace, including the support frame of radial setting in the both sides of rotary hearth furnace hearth, the both ends of support frame top are equipped with support rod perpendicularly respectively, two support rod top inboard are equipped with rotary joint respectively, the inboard of two rotary joints is connected with the inboard one end of U type's lift support respectively, the upper portion of the one end corresponding with rotary joint of two lift supports is equipped with lift assembly respectively, lift assembly includes first connecting block, first connecting block one end with the upper portion of the one end corresponding with rotary joint of lift support fixed connection, the bottom fixed connection of another end has second hinge support, the upper portion center of second hinge support is equipped with hole, the lower portion of second hinge support is equipped with hydraulic cylinder, is equipped with displacement sensor in hydraulic cylinder, the upper portion of the piston rod of hydraulic cylinder is equipped with hole, the upper portion center of the hole of second hinge support is equipped with the hole of the upper portion of the piston rod of hydraulic cylinder, and second pin shaft passes through the hole of second hinge support and the upper portion of the piston rod of hydraulic cylinder simultaneously, and makes second hinge support and the piston rod of hydraulic cylinder swing joint.

[0007] Rotary joint includes the first hinge support of fixed vertical setting in the inboard of lift support, the upper portion center of first hinge support is equipped with hole, the inboard one end of lift support on first hinge support one side is equipped with the hole corresponding with the upper portion center of first hinge support, and first pin shaft passes through the hole of first hinge support and lift support simultaneously, and makes first hinge support with lift support rotatable connection.

[0008] Limiting block includes the support block of fixed setting on the top of support frame, and the both ends of support block are equipped with limiting plate respectively, and the spacing between two limiting plates is greater than the width of the bottom of lift support, and the inboard lower portion of two limiting plates is equipped with connecting plate perpendicularly.

[0009] Bearing assembly includes the bearing of fixed setting on the upper surface of spiral support, and bearing is rotatably connected with connecting shaft, and connecting shaft is fixedly connected with discharging screw through connecting piece.

[0010] Transmission assembly includes the first transmission sprocket of fixedly sleeving on the connecting shaft of bearing assembly one end, and the second transmission sprocket is correspondingly arranged on the side of first transmission sprocket, and second transmission sprocket is concentrically arranged with rotary joint, and the outer side of second transmission sprocket is connected with motor reducer, and motor reducer is fixedly arranged on support frame through motor support, and motor reducer is connected with motor.

[0011] The support component comprises a second connecting block arranged in the center opening of the bottom of the hydraulic cylinder, a third hinge support is arranged below the second connecting block, a hole is arranged in the upper center of the third hinge support, the hole of the second connecting block is arranged in correspondence with the hole of the third hinge support, the third pin shaft passes through the holes of the third hinge support and the second connecting block at the same time, the third hinge support is movably connected with the second connecting block, and the third hinge support is fixedly arranged on a hinge support fixing table which is vertically arranged on the upper surface of the support frame.

[0012] The lifting discharge device for the rotary hearth furnace is started, the hydraulic cylinder is in standby state, when the discharge screw needs to be lifted, the piston rod pushes the lifting support upward, one end of the lifting support is lifted by the hydraulic cylinder, the other end rotates upward to a specific position around the first hinge support under the connection of the first pin shaft, and then drives the screw support, the bearing assembly, the discharge screw and the first transmission sprocket to be lifted upward; when the discharge screw needs to be lowered, the piston rod drives the lifting support to descend, one end of the lifting support connected with the rotary connecting piece rotates downward to a specific position around the first hinge support under the connection of the first pin shaft; the displacement sensor is arranged in the hydraulic cylinder, and the displacement sensor can control the height of the piston rod of the hydraulic cylinder driving the lifting support to ascend or descend; in the process that the lifting support is lifted and descended, the lifting support is always between the limiting plates on the two sides of the supporting block; when discharging is needed, the motor drives the second transmission sprocket to rotate through the motor speed reducer, the second transmission sprocket drives the first transmission sprocket to rotate through the transmission chain, and then the discharge screw is rotated to complete discharging.

[0013] The supporting frame below the lifting support is respectively provided with limiting blocks corresponding to the lifting support, the limiting blocks limit the lifting support, prevent the lifting support from deviating, and make the lifting support always keep in a proper position.

[0014] The utility model discloses the beneficial effect that:

[0015] 1, when a small amount of reduced iron is fused and adhered to the hearth, the discharge screw is lifted to avoid unnecessary friction between the discharge screw and the reduced iron adhered to the hearth, and when the reduced iron adhered to the hearth is too thick, the discharge screw is rotated to scrape the reduced iron; 2, by controlling the lifting and descending of the discharge screw, the distance between the blade of the discharge screw and the hearth is kept within a reasonable range, and the blade replacement is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the front view structure schematic drawing of the utility model;

[0017] Figure 2 It is the top view structure schematic drawing of the utility model;

[0018] Figure 3 It is the left view structure schematic drawing of the utility model;

[0019] Figure 4 The lifting assembly structure schematic view of the utility model.

[0020] Marked in the figure: 1, support frame; 2, support rod; 3, rotating connecting piece, 31, first hinge support, 32, first pin shaft; 4, lifting support; 5, lifting assembly, 51, first connecting block, 52, second hinge support, 53, hydraulic cylinder, 54, second pin shaft, 55, support part, 551, second connecting block, 552, third hinge support, 553, third pin shaft, 554, hinge support fixing table; 6, limit block, 61, support block, 62, limit plate, 63, connecting plate; 7, spiral support; 8, bearing assembly, 81, bearing, 82, connecting shaft, 83, connecting piece; 9, discharging screw; 10, transmission assembly, 101, first transmission sprocket, 102, second transmission sprocket, 103, motor speed reducer, 104, motor support. DETAILED DESCRIPTION

[0021] The specific implementation of the utility model is further described in detail below in combination with the drawings.

[0022] As Figures 1-4The utility model discloses a kind of liftable discharge devices for bottom furnace, including support frame 1 being arranged radially in the two sides of rotary hearth furnace bed, vertical support rod 2 is respectively arranged in the two ends above support frame 1, rotating connecting piece 3 is respectively arranged in the top inside of two support rods 2, the inside of two rotating connecting pieces 3 is respectively connected with the inside one end of U-shaped lifting support 4, rotating connecting piece 3 includes first hinge support 31 being fixed vertically arranged in the inside of lifting support 4, hole is opened in the upper center of first hinge support 31, the inside one end of lifting support 4 in the side of first hinge support 31 is opened with the hole corresponding with the upper center of first hinge support 31, first pin shaft 32 is passed through the hole of first hinge support 31 and lifting support 4 simultaneously, so that first hinge support 31 and lifting support 4 are rotatably connected;The upper portion of the one end corresponding with rotating connecting piece 3 of two lifting supports 4 is respectively equipped with lifting assembly 5, lifting assembly 5 includes first connecting block 51, one end of first connecting block 51 is fixedly connected with the upper portion of the one end corresponding with rotating connecting piece 3 of lifting support 4, second hinge support 52 is fixedly connected in the bottom of the other end, hole is opened in the upper center of second hinge support 52, hydraulic cylinder 53 is equipped below second hinge support 52, hole is opened in the upper of the piston rod of hydraulic cylinder 53, the hole opened in the upper center of second hinge support 52 corresponds with the hole opened in the upper of the piston rod of hydraulic cylinder 53, second pin shaft 54 is passed through the hole of second hinge support 52 and the hole opened in the upper of the piston rod of hydraulic cylinder 53 simultaneously, so that second hinge support 52 and the piston rod of hydraulic cylinder 53 are movably connected;The bottom of hydraulic cylinder 53 is rotatably connected with support component 55, support component 55 includes second connecting block 551 being arranged in the center hole of the bottom of hydraulic cylinder 53, third hinge support 552 is equipped below second connecting block 551, hole is opened in the upper center of third hinge support 552, the hole of second connecting block 551 is correspondingly arranged with the hole of third hinge support 552, third pin shaft 553 is passed through the hole of third hinge support 552 and second connecting block 551 simultaneously, so that third hinge support 552 and second connecting block 551 are movably connected, third hinge support 552 is fixedly arranged on hinge support fixed platform 554, hinge support fixed platform 554 is vertically arranged on the upper surface of support frame 1;The upper surface of support frame 1 below lifting support 4 is respectively equipped with limiting block 6 corresponding with lifting support 4, limiting block 6 limits lifting support 4, limiting block 6 includes support block 61 being fixedly arranged above support frame 1, limiting plate 62 is respectively arranged in the two ends of support block 61, the spacing between the two limiting plates 62 is greater than the width of the bottom of lifting support 4, connecting plate 63 is vertically arranged in the inside below the two limiting plates 62;The upper surface of lifting support 4 is equipped with spiral support 7, bearing assembly 8 is fixedly arranged in the upper of spiral support 7, the two ends of discharging spiral 9 are connected with bearing assembly 8, bearing assembly 8 includes bearing 81 being fixedly arranged on the upper surface of spiral support 7, bearing 81 is rotatably connected with connecting shaft 82, connecting shaft 82 is fixedly connected with discharging spiral 9 through connecting piece 83.The bearing assembly 8 is connected with the transmission assembly 10 at one end, the transmission assembly 10 comprises a first transmission sprocket 101 fixedly sleeved on a connecting shaft 82 at one end of the bearing assembly 8, a second transmission sprocket 102 is arranged on one side of the first transmission sprocket 101 in correspondence, the second transmission sprocket 102 is arranged concentrically with the rotating connecting piece 3, the outer side of the second transmission sprocket 102 is connected with a motor speed reducer 103, the motor speed reducer 103 is fixedly arranged on the support frame 1 through a motor support 104, and the motor speed reducer 103 is connected with a motor.

[0023] The liftable discharging device for the rotary hearth furnace is started, the hydraulic cylinder 53 is in a standby state, when the discharging screw 9 needs to be lifted, the piston rod pushes the lifting bracket 4 upwards, one end of the lifting bracket 4 is lifted by the hydraulic cylinder 53, the other end is connected with the first pin shaft 32 and rotates upwards to a specific position around the first hinge support 31, and then drives the screw support 7, the bearing assembly 8, the discharging screw 9 and the first transmission sprocket 101 to be lifted upwards; when the discharging screw 9 needs to be lowered, the piston rod drives the lifting bracket 4 to descend, one end of the lifting bracket 4 connected with the rotating connecting piece 3 rotates downwards to a specific position around the first hinge support 31 under the connection of the first pin shaft 32; the hydraulic cylinder 53 is provided with a displacement sensor, the displacement sensor can control the height of the piston rod of the hydraulic cylinder 53 driving the lifting bracket 4 to ascend or descend; in the process of the lifting bracket 4 ascending and descending, the lifting bracket 4 is always between the limiting plates 62 on both sides of the supporting block 61; when discharging is needed, the motor drives the second transmission sprocket 102 to rotate through the motor speed reducer 103, the second transmission sprocket 102 drives the first transmission sprocket 101 to rotate through a transmission chain, and then drives the discharging screw 9 to rotate to complete discharging; the utility model has the advantages of simple structure and convenient use, when a small amount of reduced iron is melted and adhered to the hearth, the discharging screw is lifted to avoid unnecessary friction between the discharging screw and the reduced iron adhered to the hearth, when the reduced iron adhered to the hearth is too thick, the discharging screw is rotated to scrape the reduced iron; the distance between the blades of the discharging screw and the hearth is kept within a reasonable range by controlling the lifting and descending of the discharging screw, and the blades are replaced less.

Claims

1. A liftable discharging device for a rotary hearth furnace, comprising a support frame (1) arranged radially on both sides of a rotary hearth furnace hearth, vertical support rods (2) being arranged at both ends of the support frame (1), characterized in that: Two support rods (2) top inside respectively are provided with rotating connecting piece (3), two rotating connecting piece (3) outside respectively with the inside one end of U type's lifting support (4) is connected, two lifting supports (4) and rotating connecting piece (3) corresponding one end's upper part is equipped with lifting assembly (5) respectively, lifting assembly (5) includes first connecting block (51), first connecting block (51) one end and lifting support (4) with rotating connecting piece (3) corresponding one end's upper part fixed connection, the bottom of the other end fixed connection has second hinge support (52), the upper part center of second hinge support (52) is provided with hole, the lower part of second hinge support (52) is equipped with hydraulic cylinder (53), the inside of hydraulic cylinder (53) is equipped with displacement sensor, the upper part of the piston rod of hydraulic cylinder (53) is provided with hole, the upper part center of second hinge support (52) is provided with hole and the upper part of the piston rod of hydraulic cylinder (53) is provided with hole corresponding, second pin shaft (54) is passed through second hinge support (52) and the upper part of the piston rod of hydraulic cylinder (53) hole simultaneously, make second hinge support (52) and the piston rod of hydraulic cylinder (53) swing joint;Hydraulic cylinder (53) bottom and support component (55) rotatable connection, support component (55) bottom fixed setting in support frame (1) upper surface;The support frame (1) of lifting support (4) lower part is respectively equipped with limit block (6) with lifting support (4) corresponding, limit block (6) is positioned to lifting support (4), and the upper surface of lifting support (4) is equipped with spiral support (7), and the upper part of spiral support (7) is fixedly provided with bearing assembly (8), and the both ends of bearing assembly (8) are connected with discharging screw (9), and one end of bearing assembly (8) is connected with transmission assembly (10).

2. A liftable discharge device for a rotary hearth furnace according to claim 1, characterized in that: Rotating connecting piece (3) includes first hinge support (31) fixedly vertically arranged in the inside of lifting support (4), the upper part center of first hinge support (31) is provided with hole, the inside one end of lifting support (4) on the side of first hinge support (31) is provided with hole corresponding to the upper part center of first hinge support (31), first pin shaft (32) is passed through the hole of first hinge support (31) and lifting support (4) simultaneously, so that first hinge support (31) and lifting support (4) are rotatably connected.

3. A liftable discharge device for a rotary hearth furnace according to claim 2, characterized in that: Limit block (6) includes support block (61) fixedly arranged on the upper side of support frame (1), support block (61) both ends are respectively provided with limit plate (62), the spacing between the two limit plates (62) is greater than the width of the bottom of lifting support (4), and the lower side of the inside of the two limit plates (62) is vertically provided with connecting plate (63).

4. A liftable discharge device for a rotary hearth furnace according to claim 3, characterized in that: Bearing assembly (8) includes bearing (81) fixedly arranged on the upper surface of spiral support (7), bearing (81) is rotatably connected with connecting shaft (82), and connecting shaft (82) is fixedly connected with discharging screw (9) through connecting piece (83).

5. A liftable discharge device for a rotary hearth furnace according to claim 4, characterized in that: The transmission assembly (10) comprises a first transmission sprocket (101) fixedly sleeved on a connecting shaft (82) at one end of the bearing assembly (8), one side of the first transmission sprocket (101) is correspondingly provided with a second transmission sprocket (102), the second transmission sprocket (102) is concentrically arranged with the rotating connecting piece (3), the outer side of the second transmission sprocket (102) is connected with a motor reducer (103), the motor reducer (103) is fixedly arranged on the support frame (1) through a motor support (104), and the motor reducer (103) is connected with a motor.

6. A liftable discharge device for a rotary hearth furnace according to claim 5, characterized in that: The support component (55) comprises a second connecting block (551) provided with a central opening at the bottom of the hydraulic cylinder (53), a third hinge support (552) is arranged below the second connecting block (551), a hole is arranged in the upper part of the third hinge support (552), the hole of the second connecting block (551) is correspondingly arranged with the hole of the third hinge support (552), the third pin shaft passes through the holes of the third hinge support (552) and the second connecting block (551) at the same time, the third hinge support (552) is movably connected with the second connecting block (551), the third hinge support (552) is fixedly arranged on a hinge support fixing table (554), and the hinge support fixing table (554) is vertically arranged on the upper surface of the support frame (1).

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