CN216925100U

CN216925100U - Rotary kiln head shifting block machine

Info

Publication number: CN216925100U
Application number: CN202220589886.8U
Authority: CN
Inventors: 赵国栋; 柳汉文; 王智慧; 贾栓礼
Original assignee: Taigang Daixian Mining Co ltd; Taiyuan Iron and Steel Group Co Ltd
Current assignee: Taigang Daixian Mining Co ltd; Taiyuan Iron and Steel Group Co Ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-07-08
Anticipated expiration: 2032-03-18

Abstract

The utility model relates to the field of metallurgy. A rotary kiln head shifting block machine comprises a guide rail (1), a trolley (2), a pulling frame (3) and a pulling head (4), wherein the trolley (2) runs on the guide rail, the pulling frame (3) is fixedly installed on the trolley (2), the pulling head (4) is installed on the pulling frame (3), and the guide rail (1) is fixed outside a side door of a rotary kiln. Can push away the heap ball in fixed sieve lower extreme, the side door in the hopper or take off outside the side door, take off the bold on the fixed sieve outside the kiln, carry the specified chute mouth with the bold or pelletizing of piling up outside the side door shovel, take off the head and can control from top to bottom, the action point can cover whole fixed sieve and heap ball district, can realize the shovel of the outer deposit of side door and transport.

Description

Rotary kiln head shifting block machine

Technical Field

The utility model relates to the field of metallurgy.

Background

Due to the process characteristics, almost all rotary kilns for processing bulk materials at high temperature have the problem of ring formation on the inner wall of the kiln, the thin-layer ring formation is beneficial to protecting refractory materials on the kiln wall and prolonging the service life, but when the ring formation reaches a certain thickness, the system productivity is reduced, the quality is deteriorated, the energy consumption is increased, and the comprehensive technical and economic effects are poor.

The iron ore oxidized pellet rotary kiln also faces the problem of ring formation, and the main factors influencing the ring formation are as follows: the main measures for preventing ring formation include the following steps: the method has the advantages of improving the green pellet quality by increasing the proportion of bentonite, improving the strength of preheating pellets by strengthening drying and preheating of a chain grate, using coal or gas-based fuel with high ash melting point and less ash amount, reducing the system yield, balancing production and the like, and greatly increasing the pellet cost if the ring formation of the rotary kiln is prevented from the aspects.

When the thickness of the ring materials continues to increase to a certain degree, the ring materials fall off from the kiln wall under the action of gravity and thermal stress, then spirally roll to the kiln head along with the pellets and fall onto the fixed screen, the fixed screen is a strip seam, the blocks smaller than 200mm can pass through the fixed screen and enter the circular cooler, the blocks larger than 200mm can be detained on the fixed screen, if the blocks are not pulled out in time, the blocks can be gathered in a large amount, the passing of the pellets is influenced, and even the production stop is caused.

Most of the existing iron ore pellet rotary kilns do not specially consider the rapid and efficient extraction of the ring-forming materials during the design, and when large blocks exist on a fixed sieve, the iron ore pellet rotary kilns are treated by adopting two methods: firstly, various original low-efficiency tools are adopted, manual pulling is performed, the efficiency is low, and hidden dangers of mechanical injury and scalding exist; and secondly, a small excavator is arranged on the kiln head platform, so that the movement is inflexible in actual use and the efficiency is low. And the excavator investment is large.

When a large amount of ring materials are accumulated on the fixed sieve, the system stops production due to the fact that the ring materials cannot be timely pulled out, and a plurality of domestic pellet factories affect the operation rate of the system due to the fact that the mechanical efficiency of pulling large blocks is low, and therefore the overall benefit is affected.

At present, a hydraulic excavator is adopted by a lot of manufacturers, an excavator bucket is changed into a digging frame, and kiln head pulling is carried out. The disadvantages are high cost of equipment and high maintenance cost.

Disclosure of Invention

The technical problem to be solved by the utility model is as follows: how to provide a kiln head shifting block machine with high efficiency, flexibility, high safety performance and low cost so as to improve the overall benefit of a pelletizing plant.

The technical scheme adopted by the utility model is as follows: a rotary kiln head shifting block machine comprises a guide rail (1), a trolley (2), a pulling frame (3) and a pulling head (4), wherein the trolley (2) runs on the guide rail, the pulling frame (3) is fixedly installed on the trolley (2), the pulling head (4) is installed on the pulling frame (3), and the guide rail (1) is fixed outside a side door of a rotary kiln.

The guide rail (1) is a compound guide rail formed by two parallel steel I-beams (11), a T-shaped upper clamping edge (12) is arranged in the upper parallel edge of the inner side of each steel I-beam, an inverted T-shaped lower clamping edge (13) is arranged on the lower parallel edge of the inner side of each steel I-beam, and a rack (14) is fixedly arranged outside the lower clamping edge (13); the trolley (2) comprises a trolley body (25), a motor and a speed reducer (22) which are arranged on the trolley body (25), a walking gear (23) which is meshed with the rack (14), a transmission gear (21) which is meshed with the walking gear (23) and is arranged on an output shaft of the motor and the speed reducer (22), a walking wheel (24) with a groove, a revolving shaft seat (26) which is arranged on the trolley body (25), and a revolving shaft (27) which is arranged on the revolving shaft seat (26), wherein the raking frame (3) is connected with the revolving shaft (27) through the revolving shaft; when the trolley (2) runs on the guide rail (1), the upper clamping edge (12) and the lower clamping edge (13) are clamped above and below the groove of the running wheel (24), and the running gear (23) is positioned on the rack (14).

The turning shaft seat (26) is an arched support fixed on the vehicle body (25), a through hole is formed in a plane arch bridge of the arched support, one end of the turning shaft (27) penetrates through the through hole and is fixed through an upper clamping plate and a lower clamping plate, a transverse shaft is fixed on the turning shaft (27), a side lug is fixed on the disassembling frame (3), one end of a first hydraulic cylinder (28) is fixed on the transverse shaft of the turning shaft (27), the other end of the first hydraulic cylinder is fixed on the side lug of the disassembling frame (3), a turning arm (29) is fixedly installed at one end, penetrating through the through hole, of the turning shaft (27), a fixed support (5) is installed on the vehicle body (25), and one end of a second hydraulic cylinder (210) is connected with one end of the turning arm (29) and is connected with the fixed support (5).

The whole rake head (4) is in a rake shape and comprises a cross rod (41) with rake teeth (44) and a longitudinal rod (45) which is fixed with the cross rod (41) and vertical to the cross rod, the interior of the longitudinal rod (45) is hollow, the surface of the longitudinal rod is provided with small air outlet holes, an air inlet (43) is formed in the longitudinal rod (45), and the tail part of the longitudinal rod (45) is provided with two first pin holes vertical to the longitudinal rod; the raking frame (3) is a frame body which is welded by steel and is vertically and rotatably connected with the rotating shaft (27), a longitudinal rod hole is formed in the raking frame (3), second pin holes are formed in two sides of the longitudinal rod hole, in the using process, the tail of a longitudinal rod (45) penetrates into the longitudinal rod hole, and a pin shaft is inserted into the first pin hole and the second pin hole.

The utility model has the beneficial effects that: can push away the heap ball in fixed sieve lower extreme, the side door in the hopper or take off outside the side door, take off the bold on the fixed sieve outside the kiln, carry the specified chute mouth with the bold or pelletizing of piling up outside the side door shovel, take off the head and can control from top to bottom, the action point can cover whole fixed sieve and heap ball district, can realize the shovel of the outer deposit of side door and transport.

Drawings

FIG. 1 is a schematic view of the apparatus of the present invention in elevation;

FIG. 2 is a schematic plan view of the apparatus of the present invention;

FIG. 3 is an assembled elevational schematic view of the cart;

FIG. 4 is a plan view of the cart assembly;

FIG. 5 is a schematic view of the structure of the guide rail;

FIG. 6 is a schematic view of the assembly structure of the trolley and the guide rail;

FIG. 7 is a schematic view of the vertical rotation of the raking frame;

FIG. 8 is a schematic view of a left and right turning plane of the raking frame;

FIG. 9 is a schematic view of the left and right turning elevation of the raking frame;

FIG. 10 is a schematic view of a gin head;

FIG. 11 is a schematic view of a kiln head of a prior art rotary kiln;

the device comprises a guide rail 1, a guide rail 2, a trolley 3, a raking frame 4, a raking head 5, a fixed support, 11, an I-shaped steel beam 12, an upper clamping edge 13, a lower clamping edge 14, a rack 21, a transmission gear 22, a motor and a speed reducer 23, a traveling gear 24, a traveling wheel 25, a trolley body 26, a rotating shaft seat 27, a rotating shaft 28, a first hydraulic cylinder 29, a rotating arm 210, a second hydraulic cylinder 41, a cross rod 42, a first pin hole 43, an air inlet 44, raking teeth 45 and a longitudinal rod.

Detailed Description

A rotary kiln head shifting machine is used for pushing stacked balls at the lower end of a fixed screen and in a side door of an iron ore pellet rotary kiln into a receiving hopper or shoveling the stacked balls outside the side door to a designated chute opening, a shovel head can move up and down and left and right, an action point can cover the whole fixed screen and a ball stacking area, and shoveling and transporting of deposits outside the side door can be realized, and the rotary kiln head shifting machine comprises a guide rail 1, a trolley 2, a shovel frame 3 and a shovel head 4, wherein the trolley 2 runs on the guide rail, the trolley 2 is positioned below the guide rail 1 in an inverted device, the shovel frame 3 is fixedly installed on the trolley 2, the shovel head 4 is installed on the shovel frame 3, and the guide rail 1 is fixed outside the side door of the rotary kiln.

As shown in fig. 3-6, the guide rail 1 is a compound guide rail formed by two parallel i-shaped steel beams 11, an upper T-shaped clamping edge 12 is installed inside the upper parallel edge of the inner side of each i-shaped steel beam, a lower T-shaped clamping edge 13 is installed on the lower parallel edge of the inner side of each i-shaped steel beam, and a rack 14 is fixedly installed outside the lower clamping edge 13; the trolley 2 comprises a trolley body 25, a motor and a speed reducer 22 arranged on the trolley body 25, a walking gear 23 meshed with the rack 14, a transmission gear 21 meshed with the walking gear 23 and arranged on an output shaft of the motor and the speed reducer 22, a walking wheel 24 with a groove, a rotating shaft seat 26 arranged on the trolley body 25, and a rotating shaft 27 arranged on the rotating shaft seat 26, wherein the raking frame 3 is connected with the rotating shaft 27 through the rotating shaft; when the trolley 2 runs on the guide rail 1, the upper clamping edge 12 and the lower clamping edge 13 are clamped above and below the groove of the running wheel 24, and the running gear 23 is positioned on the rack 14 and meshed with the rack 14.

The travelling wheels 24 are pressed above the guide rails 1 and support the whole weight of the objects on the trolley 2. The trolley 2 is driven by a motor and two cycloid pin gear reducers of the same type, an output shaft of the reducer is meshed with a transmission gear at one end of a walking gear through a transmission gear on the reducer, the transmission gear is coaxially and rigidly connected with the walking gears at two sides, and a walking gear 23 is meshed with a rack 14 on the guide rail 1, so that the trolley 2 moves on the guide rail 1, the walking gears at two sides are rigidly connected, and the left and right deflection of the trolley in the running process is prevented. The rotary shaft is connected with the raking frame, and a hydraulic oil cylinder is connected onto the rotary shaft to realize the up-down and left-right rotation of the raking frame. The traveling wheels adopt double wheel rims (the middle part is low, the outer edge is high), and the transverse displacement of the trolley is limited.

As shown in fig. 7-9, the revolving shaft base 26 is an arch support fixed on the vehicle body 25, a through hole is formed on a plane arch bridge of the arch support, one end of the revolving shaft 27 passes through the through hole and is fixed through an upper clamping plate and a lower clamping plate, a transverse shaft is fixed on the revolving shaft 27, a side lug is fixed on the raking frame 3, one end of the first hydraulic cylinder 28 is fixed on the transverse shaft of the revolving shaft 27, the other end of the first hydraulic cylinder is fixed on the side lug of the raking frame 3, a revolving arm 29 is fixedly installed at one end of the revolving shaft 27 passing through the through hole, a fixed support 5 is installed on the vehicle body 25, one end of the second hydraulic cylinder 210 is connected with the revolving arm 29, and one end of the second hydraulic cylinder is connected with the fixed support 5.

The whole rake-shaped rake head 4 comprises a cross rod 41 with rake teeth 44 and a vertical rod 45 fixed with and vertical to the cross rod 41, the vertical rod 45 is hollow inside and has small air outlet holes on the surface, an air inlet 43 is arranged on the vertical rod 45, and two first pin holes vertical to the tail of the vertical rod 45 are arranged; the raking frame 3 is a frame body which is welded by steel and is vertically and rotatably connected with the rotating shaft 27, a longitudinal rod hole is formed in the raking frame 3, second pin holes are formed in two sides of the longitudinal rod hole, in the using process, the tail of the longitudinal rod 45 penetrates through the longitudinal rod hole, and a pin shaft is inserted into the first pin hole and the second pin hole.

The raking teeth are formed by welding heat-resistant steel, the tail end of the longitudinal rod 45 is provided with a connecting pin hole which is quickly assembled and disassembled with the raking frame 3, and a cooling air inlet is arranged, so that compressed air is introduced during large block poking operation, and the rigidity and the strength of the longitudinal rod 45 are ensured. In actual use, the raking teeth can be made to rotate around the cross rod 41 (this embodiment is not required, and the prior art has this rotary raking tooth) to reduce the size when entering the kiln (when a large amount of ring materials are accumulated on the fixed screen).

Left and right limiting of the raking frame:

the limit switch (the second hydraulic cylinder is provided with the maximum and minimum stretching amount) is arranged to control the action of the hydraulic station switching valve and control the rotation of the rotating shaft, so that the left and right limit positions of the raking head are limited, and the side door and the kiln head cover are prevented from colliding.

The upper and lower limiting of the raking frame:

the limit switch is arranged on the rotary shaft (the first hydraulic cylinder is provided with the maximum and minimum stretching amount), the hydraulic station switching valve is controlled to act, the vertical rotation of the raking frame is controlled, and the upper limit position and the lower limit position of the raking head are controlled, so that the raking head does not collide with the side door and the kiln head cover.

And (3) trolley walking safety protection:

a relay protection device (adopting the prior art) is arranged, when the walking load of the trolley exceeds the limit, the power supply of the walking motor is cut off, and after the clamping stagnation is eliminated, the power supply is recovered, and the operation is continued.

Claims

1. A rotary kiln hood shifting block machine is characterized in that: the rotary kiln comprises a guide rail (1), a trolley (2), a raking frame (3) and a raking head (4), wherein the trolley (2) runs on the guide rail, the raking frame (3) is fixedly installed on the trolley (2), the raking head (4) is installed on the raking frame (3), and the guide rail (1) is fixed outside a side door of the rotary kiln.

2. The rotary kiln head shifting block machine as claimed in claim 1, characterized in that: the guide rail (1) is a compound guide rail formed by two parallel I-shaped steel beams (11), a T-shaped upper clamping edge (12) is arranged in the upper parallel edge of the inner side of each I-shaped steel beam, an inverted T-shaped lower clamping edge (13) is arranged on the lower parallel edge of the inner side of each I-shaped steel beam, and a rack (14) is fixedly arranged outside the lower clamping edge (13); the trolley (2) comprises a trolley body (25), a motor and a speed reducer (22) which are arranged on the trolley body (25), a walking gear (23) which is meshed with the rack (14), a transmission gear (21) which is meshed with the walking gear (23) and is arranged on an output shaft of the motor and the speed reducer (22), a walking wheel (24) with a groove, a revolving shaft seat (26) which is arranged on the trolley body (25), and a revolving shaft (27) which is arranged on the revolving shaft seat (26), wherein the raking frame (3) is connected with the revolving shaft (27) through the revolving shaft; when the trolley (2) runs on the guide rail (1), the upper clamping edge (12) and the lower clamping edge (13) are clamped above and below the groove of the running wheel (24), and the running gear (23) is positioned on the rack (14).

3. The rotary kiln head shifting block machine as claimed in claim 2, characterized in that: the turning shaft seat (26) is an arched support fixed on the vehicle body (25), a through hole is formed in a plane arch bridge of the arched support, one end of the turning shaft (27) penetrates through the through hole and is fixed through an upper clamping plate and a lower clamping plate, a transverse shaft is fixed on the turning shaft (27), a side lug is fixed on the disassembling frame (3), one end of a first hydraulic cylinder (28) is fixed on the transverse shaft of the turning shaft (27), the other end of the first hydraulic cylinder is fixed on the side lug of the disassembling frame (3), a turning arm (29) is fixedly installed at one end, penetrating through the through hole, of the turning shaft (27), a fixed support (5) is installed on the vehicle body (25), and one end of a second hydraulic cylinder (210) is connected with one end of the turning arm (29) and is connected with the fixed support (5).

4. The rotary kiln head shifting block machine as claimed in claim 3, characterized in that: the whole rake head (4) is in a rake shape and comprises a cross rod (41) with rake teeth (44) and a longitudinal rod (45) which is fixed with the cross rod (41) and vertical to the cross rod, the interior of the longitudinal rod (45) is hollow, the surface of the longitudinal rod is provided with small air outlet holes, an air inlet (43) is formed in the longitudinal rod (45), and the tail part of the longitudinal rod (45) is provided with two first pin holes vertical to the longitudinal rod; the raking frame (3) is a frame body which is welded by steel and is vertically and rotatably connected with the rotating shaft (27), a longitudinal rod hole is formed in the raking frame (3), second pin holes are formed in two sides of the longitudinal rod hole, in the using process, the tail of a longitudinal rod (45) penetrates into the longitudinal rod hole, and a pin shaft is inserted into the first pin hole and the second pin hole.