阅读说明：本技术 一种顶封式辊道的机械化换辊装置 (Mechanical roller changing device of top seal type roller way ) 是由 李亮 陈阳 姜巍青 邵峰 代瑞娜 于 2021-01-06 设计创作，主要内容包括：一种顶封式辊道的机械化换辊装置,属于冶金及金属加工领域。本发明提供一种可以在狭窄且有障碍物的工作场地实现机械换辊的装置。包括换辊车、摆动机构、横移小车、横移小车驱动机构和电控柜等。换辊车、摆动机构、和横移小车驱动机构各由一台电机驱动。换辊车1放置到预先铺设的换辊轨道上,摆动机构2和电控柜5安装在换辊车1上,通过螺栓连接；横移小车3在摆动机构2的水平轨道上行走；横移小车驱动机构4通过螺栓安装在摆动机构2上。本发明的换辊装置占地面积小、能够灵活地避开运行通路上的各种障碍物。只要在生产线旁边的检修通道上铺两条钢轨,就可以采用本发明的设备实现全线机械化换辊,基本不需要对现有工艺设施进行改造。(A mechanized roller changing device of a top sealing type roller way belongs to the field of metallurgy and metal processing. The invention provides a device capable of realizing mechanical roll changing in a narrow working place with obstacles. Comprises a roll changing trolley, a swing mechanism, a transverse trolley driving mechanism, an electric control cabinet and the like. The roller changing vehicle, the swing mechanism and the driving mechanism of the transverse trolley are respectively driven by a motor. The roll changing trolley 1 is placed on a roll changing track laid in advance, and the swing mechanism 2 and the electric control cabinet 5 are installed on the roll changing trolley 1 and connected through bolts; the traversing carriage 3 runs on a horizontal track of the swing mechanism 2; the driving mechanism 4 of the traversing carriage is arranged on the swinging mechanism 2 through a bolt. The roll changing device has small floor area and can flexibly avoid various obstacles on the operation passage. As long as two steel rails are paved on a maintenance passage beside a production line, the full-line mechanical roller replacement can be realized by adopting the equipment provided by the invention, and the existing process facilities are not required to be transformed basically.)

1. A mechanized roller changing device of a top sealing type roller way is characterized by comprising a roller changing trolley (1), a swinging mechanism (2), a transverse trolley (3), a transverse trolley driving mechanism (4) and an electric control cabinet (5); the roller changing trolley (1) is placed on a roller changing track, the swing mechanism (2) and the electric control cabinet (5) are installed on the roller changing trolley (1), and the base of the swing mechanism (2) is connected with the transverse trolley (3) through bolts; wheels of the transverse trolley (3) are arranged on a horizontal track of the swing mechanism (2); the driving mechanism (4) of the traversing trolley is arranged on the swinging mechanism (2).

2. The roll changing device according to claim 1, characterized in that the roll changing carriage (1) comprises a carriage body with steel wheels and a driving motor, wherein the driving motor is fixed on the carriage body with steel wheels through bolts, and an axle is driven to rotate through a chain wheel and a chain which are assembled on an output shaft of the driving motor.

3. The roll changing device according to claim 1, characterized in that the swing mechanism (2) is a four-bar linkage mechanism, comprising a base, double cranks, a horizontal connecting rod with a guide rail, an electric push rod or a hydraulic cylinder and a pin shaft; the base is installed on a roller changing trolley (1), the lower part of the double crank is connected with the base through a pin shaft, the upper part of the double crank is connected with a connecting rod through a pin shaft, a hinged point of an electric push rod or a hydraulic cylinder is fixed on the base, and a trunnion of a push rod in the electric push rod or a piston rod in the hydraulic cylinder is connected with the middle of a crank.

4. A roll-changing device according to claim 1, characterized in that the base of the oscillating mechanism (2) is provided with a power spring and a supporting bolt.

5. The roll changing device as claimed in claim 1, characterized in that the traverse carriage (3) is pulled to travel by a chain of a traverse carriage driving mechanism (4), wheels of the traverse carriage driving mechanism are mounted on a horizontal rail of the swing mechanism (2), a neck of the traverse carriage is provided with a fixed circular arc-shaped clamping seat, a head top of the traverse carriage is provided with a hold-down bolt, a head front end part of the traverse carriage is provided with an eccentric sleeve with a wrench, and a core part of the eccentric sleeve is connected with a clamp capable of containing a shaft neck of a roller to be changed through a pin shaft.

6. A roll-changing device according to claim 1, characterized in that the driving mechanism (4) of the traverse carriage comprises a chain, a driving motor with a head chain wheel, a tail chain wheel and an adjusting seat thereof, and a sliding sleeve with a spring, wherein the driving motor and the adjusting seat of the tail chain wheel are arranged on a horizontal connecting rod of the swinging mechanism (2), the side chain of the tail chain wheel is directly fixed on the traverse carriage (3) through a bolt, and the side chain of the head chain wheel is fixed on the traverse carriage (3) through the sliding sleeve with the spring.

Technical Field

The invention is mainly applied to the fields of metallurgy and metal processing, can also be applied to other industrial fields, and relates to mechanical equipment for replacing a damaged or failed roller on a roller way with a closed top in a production workshop.

Background

In industrial production, there are many production lines in which roller beds for transporting long materials are installed in a closed space, such as various tunnel furnaces, heat transfer lines, continuous heat treatment furnaces, pickling tanks, and other large-scale equipment, and the rollers of such equipment need to be replaced frequently due to poor working conditions or in order to ensure product quality. For the purpose of preventing heat loss or toxic and harmful gas from escaping, the top cover is generally designed to be closed and replaced by pulling the roller out from the side. The length of some rollers reaches four meters or five meters, so that the design difficulty of roller changing equipment is very high, the rollers are generally manually changed by using simple hoisting tools, the roller changing time is long, and the labor intensity of workers is high. In actual production, the replacement is usually carried out in the periods of minor repair and intermediate repair, and even the centralized replacement is carried out in the periods of major repair, which can cause chain damage and seriously affect the enterprise benefit. Therefore, the good roller changing equipment has important significance for improving the production efficiency and maintaining the smooth production.

The roller changing tool is provided with two types, one is a simple tool, such as a balance bar, a balance hook and the like, is provided with a balance weight, is hung by a crown block to be close to a roller to be changed during operation, then the head of the roller changing tool is connected with a roller neck by a worker, and the roller is slowly drawn out by the crown block under the manual holding of the worker. The defects of the mode are that the roller changing time is long, the roller is easy to collide and scratch, the crown block is occupied for a long time, workers are forced to be exposed in severe environment, and the like. In addition, the fatal weakness of the tool is that when the roller way passes through different spans of a workshop, the crown block cannot reach the joint of the two spans, so that the difficulty of replacement is increased sharply. The other type is special roll changing equipment (mechanical arm), a roll changing tool is arranged on a slide block which can be lifted, and a slide block base is fixed on a vehicle which can move along two vertical directions on a horizontal plane. The equipment has accurate running track, does not need manual adjustment, has high working efficiency and is the development direction. The disadvantage is that the vehicle body is wide, the occupied area is large, and the investment is increased by changing the phase. The main limitation of this equipment is that it is not possible to have obstacles on its running path, such as gas, cooling water and other process pipes, valves, instruments and cables beside the kiln, and the difficulty of modification of this kind of mechanical equipment is too high, and it is generally only used in the critical situation where a small number of rolls are frequently replaced.

Disclosure of Invention

The invention provides a roller changing mode and a mechanical device for a top closed roller way, which need to transversely draw out a roller, and aims to solve the problem of realizing mechanical roller changing in a narrow working site with obstacles.

The roll changing device comprises a roll changing trolley 1, a swinging mechanism 2, a transverse trolley 3, a transverse trolley driving mechanism 4 and an electric control cabinet 5; the roll changing trolley 1 is placed on a roll changing track laid in advance, and the swing mechanism 2 and the electric control cabinet 5 are installed on the roll changing trolley 1 and connected through bolts; the traversing carriage 3 runs on a horizontal track of the swing mechanism 2; the driving mechanism 4 of the traversing carriage is arranged on the swinging mechanism 2 through a bolt.

The roll changing cart 1 comprises a cart body 101 with steel wheels and a driving motor 102. The driving motor is fixed on the vehicle body through a bolt, and the axle is driven to rotate through a chain wheel and a chain which are assembled on an output shaft of the driving motor, so that the roll changing vehicle 1 travels on a track laid along a production line and reaches a specified roll changing position.

The swing mechanism 2 is a four-bar linkage, and comprises a base 201, 2 cranks 202, a horizontal connecting bar 203 with a trolley guide rail, an electric push rod (or a hydraulic cylinder) 204 and the like; the base 201 is installed on the roller changing car 1, the lower part of the double crank 202 is connected with the base 201 through a pin shaft, the upper part of the double crank 202 is connected with the connecting rod 203 through a pin shaft, the hinged point of the electric push rod (or hydraulic cylinder) 204 is fixed on the base 201, and the trunnion of the push rod (or piston rod) is connected with the middle part of one crank 202. The swing mechanism is a key component of the invention, and drives the crank 202 to swing through the extension and retraction of the push rod 204, so as to drive the connecting rod 203 to do circular motion under the condition of always keeping a horizontal state, thereby realizing lifting and compensating a part of side-to-side motion, and enabling the roller changing vehicle to flexibly avoid obstacles in the advancing process.

Because the distance between the two cranks 202 is far less than the length of the connecting rod 203 with the transverse trolley guide rail, and the width of the roll changing trolley 1 only needs to meet the requirements of installing the two cranks and reserving a swing space, compared with the prior art, the track gauge of the roll changing trolley track can be reduced by 1/3-1/2, and the floor area is greatly saved.

The base 201 of the swing mechanism 2 is provided with an assisting spring 205, and the assisting spring is used for providing additional supporting force for the crank near the swing limit position, so that the maximum load of the electric push rod is reduced by about 1/4-1/3, and the weight and the equipment capacity are reduced.

The base 201 of the swing mechanism 2 is provided with a supporting bolt 206 which is used for positioning the roll changing trolley 1 at the working position and directly acting a large unbalance load on the track, so that the integral rigidity of the equipment is improved.

The traversing carriage 3 is dragged to travel through a chain of the driving mechanism 4, and wheels of the traversing carriage are arranged on a horizontal track of the swinging mechanism 2. The neck of the vehicle body is provided with a fixed arc-shaped clamping seat 300, the top of the vehicle head is provided with a compression bolt 301, the front end part of the vehicle head is provided with an eccentric sleeve 302 with a wrench, and the center part of the eccentric sleeve is connected with a clamp 303 capable of holding the journal of the roller to be replaced through a pin shaft.

The circular arc-shaped clamping seat 300 presses the shaft end of the roller to be replaced, and the hoop 303 catches the shaft end of the roller to be replaced, so that the roller is fixed. Because the center of gravity of the roller is far away from the fixed point, under the action of gravity, the roller and the clamp 303 are subjected to large elastic deformation, so that the far end of the roller inclines downwards in the lifting process. The function of the eccentric sleeve 302 with the wrench and the compression bolt 301 is to apply an upward torque to the roller, so that the roller is in a horizontal state after being lifted. This function is also not available in the prior art.

The driving mechanism 4 of the traverse trolley comprises a chain 401, a driving motor 402 with a head chain wheel, a tail chain wheel and an adjusting seat 403 thereof, a sliding sleeve 404 with a spring and the like. The chain 401 is looped around the head sprocket and the tail sprocket to form a closed loop by the traverse carriage 3, and the end thereof is directly fixed to the traverse carriage 3 by a bolt on the tail sprocket side and is fixed to the traverse carriage 3 by a slide bush 404 with a spring on the head sprocket side. The drive motor 402 and the tail sprocket adjustment seat 403 are mounted on the horizontal link 203 of the swing mechanism 2,

since the motion trail of the horizontal link 203 is circular motion, there is a horizontal component displacement during the ascending process. When the roller to be replaced is lifted, the bearing seat of the roller cannot be separated from the base immediately due to the elastic deformation of the components, and the traverse trolley 3 drags the roller along with the horizontal component movement of the swing mechanism 2, so that the roller is scratched. The provision of the sliding sleeve 404 with springs provides a buffer between the dolly 3 and the drive chain 401, allowing passive horizontal movement of the dolly 3 within a certain range to accommodate the adhesion of the roller bearing housing to the base. This is also a key innovation in the ability of the present invention to employ a four bar linkage. In addition, when the traverse trolley 3 moves towards the direction of the tail chain wheel, the sliding sleeve 404 with the spring can absorb the chain with loose upper side, reduce the pretension force of the chain and prolong the service life of the chain.

The invention has the advantages that:

1. various obstacles on a running path can be flexibly avoided, and the equipment can be adopted to realize full-line mechanical roller replacement by only laying two steel rails on a maintenance passage beside a production line, and hardly needs to transform the existing process facilities.

2. Compared with the conventional roller changing mode, the roller changing device can realize accurate action without manual support, and workers only need to operate buttons and simple auxiliary work to liberate the workers from heavy labor and severe working environment and avoid damaging related facilities in the roller extracting process.

3. The roll changing time of the invention is greatly shortened, and is only 1/4-1/3 of the current roll changing mode, and the occupied time of the crown block is only 1/10-1/5 of the current roll changing mode, thus providing the working efficiency.

4. Because the roller changing time is shortened, the roller which needs to be changed in the minor repair or the middle repair can be carried out in the daily production halt, and the running with damage and the chain damage of the equipment are avoided. Thereby saving a large amount of spare part cost.

In conclusion, the economic effect and the social effect of the invention are very obvious. The roll changing equipment of the invention is suitable for a large number of production lines and is easy to realize, thus bringing hope for changing old production modes and greatly improving the modernization level of industrial production.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention. Comprises a roll changing vehicle 1, a swing mechanism 2, a transverse trolley 3, a transverse trolley driving mechanism 4 and an electric control cabinet 5.

Fig. 2 is a left side view of fig. 1.

FIG. 3 is a schematic view of a roll changer.

Detailed Description

Fig. 3 shows an embodiment of the present invention.

As shown in FIG. 3, it is a cross-sectional view of a steel-making billet tunnel furnace, wherein A01 is the furnace body of the tunnel furnace, and the rollers A02 of the internal roller table are fixed on the supports outside the side wall of the furnace body through bearing seats. Due to the limitation of the drawing, only the operating side portion is cut out, the driving side is symmetrical to the operating side with respect to the center line, and a driving motor having a roller a02 is connected to the roller a02 beyond the roller end of the driving side. Gas pipelines A03 are distributed at the upper part and the side surface of the furnace body A01, roller cooling water pipelines and valves A04 are distributed at the lower part of the side surface, burner cooling water valves A05 and cooling water pipelines A06 are arranged at the upper part of the side surface, and another group of roller ways A07 are arranged at the side partition maintenance passage of the tunnel furnace.

As shown in fig. 3, the track of the roll changer of the present invention is arranged on the service aisle outside the operating side of the tunnel furnace, and the roll changer of the present invention is usually placed at a position that does not affect the production, either on the track or hoisted to other places. Before changing the rolls, a worker operates the button to place the traverse carriage 3 at the illustrated position or at the intermediate position of the track thereof, and the swing mechanism 2 is in a state of being shifted to the right from the illustrated position so as to avoid the cooling water pipe a 06. The roll changer 1 is then driven to the vicinity of the roll a02 to be replaced. Another worker removed the bearing bracket attachment bolts of roller a02 and the coupling to the roller drive motor.

A roll changing step: 1) the cooling water pipes A06 are distributed irregularly along the production line, and the swinging mechanism 2 swings leftwards at the gap of the cooling water pipes A06, so that the horizontal connecting rod is positioned below the cooling water pipe A06; 2) starting the roller changing trolley 1 to align the central line of the traverse trolley with the central line of the roller A02 to be changed; 3) starting the transverse moving trolley 3 to move to the left end; 4) the swinging mechanism 2 continues to swing downwards and moves in coordination with the traversing trolley 3, so that the arc-shaped clamping seat 300 presses the shaft head of the roller; 5) the worker tightens the stay bolt 206; 6) a worker hangs the clamp 303 on the eccentric sleeve 302 through a pin, pulls a wrench on the eccentric sleeve 302 to be below the compression bolt 301, and screws the bolt; 7) starting the swing mechanism 2 to enable the roller A02 to be replaced to leave the upper surface of the support, and enabling the lower surface of the roller body to be higher than the upper surface of the support; 8) starting the transverse moving trolley 3, moving the transverse moving trolley to the right until the rollers are completely drawn out of the furnace body A01; 9) starting the roller changing car 1 to enable the center line of the transverse moving trolley to be positioned at a gap of a cooling water pipeline A06; 10) starting the swing mechanism 2 and the traverse trolley 3 to enable the rollers to be in a position suitable for hoisting and the traverse trolley 3 to leave a right-moving allowance; 11) hanging the roller A02 with a crown block steel wire rope; 12) loosening the compression bolt 301 and removing the clamp 303; 13) the trolley 3 is started to move to the right limit, the leftmost side of the trolley head is positioned at the upper right part of the shaft head of the roller A02, and the roller A02 is hoisted away by a crown block (A02 a in the figure).

For the case of overruns, the first 9 steps are the same. 10) Starting the swing mechanism 2 to enable the swing mechanism to be positioned at a position where the roller changing car 1 can pass along a production line; 11) starting the roller changing vehicle 1 to enable the roller changing vehicle to be in a position where the crown block is suitable for operation; 12) the swing mechanism 2 and the traverse trolley 3 are started again, so that the rollers are positioned at the positions suitable for hoisting, and the traverse trolley 3 is left with a right movement allowance; 13) hanging the roller A02 with a crown block steel wire rope; 14) loosening the compression bolt 301 and removing the clamp 303; 15) the trolley 3 is started to move to the right limit, the leftmost side of the trolley head is positioned at the upper right part of the shaft head of the roller A02, and the roller A02 is hoisted away by a crown block (A02 a in the figure).