Online lubricating and quick replacing device for balance weight wheel of sealing-tape machine

Abstract

The utility model provides an on-line lubrication and quick replacement device for a balance weight wheel of a sealing-tape machine, the sealing-tape machine comprises the balance weight wheel and guide stand columns located on the two sides of the balance weight wheel, a balance weight block is installed below the balance weight wheel, the two ends of a center shaft of the balance weight wheel are respectively installed on a bearing seat through a balance weight wheel bearing, and the balance weight wheel is installed on the bearing seat. The bearing seat is fixedly connected with the balancing weight; a bearing end cover oil injection hole is formed in a bearing end cover of the counterweight wheel bearing, and an oil injection pipe is mounted in the bearing end cover oil injection hole; the guiding stand column is divided into an upper stand column body and a lower stand column body, the top of the upper stand column body is connected with a supporting frame of the sealing-tape machine in a hinged mode, the bottom of the lower stand column body is fixed to the ground, and the upper stand column body is connected with the lower stand column body through a movable bolt. According to the utility model, the electric oiling pump can be used for oiling the counterweight wheel bearing periodically on line without shutdown.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace belt conveyor technology, and more specifically, to an online lubrication and quick replacement device for the counterweight roller of a belt conveyor. Background Technology

[0002] The blast furnace smelting raw material and coke bin system mainly consists of ore bins, coke bins, intermediate frames, feeding and screening equipment, weighing equipment, belt conveyors, and small coke and small-particle ore recovery facilities. All ore and coke raw material transportation in the blast furnace is accomplished by belt conveyors, which mainly consist of a motor, reducer, head pulley, counterweight pulley, return pulley, tail pulley, surface-adjusting pulley, and belt. During transportation, the weight of materials such as ore and coke can cause belt deviation, affecting belt stability and lifespan. To ensure belt balance and vertical operation, counterweights are added. The role of the counterweight is to ensure the belt maintains stable operation while bearing the weight of the materials, preventing excessive belt deviation or swaying.

[0003] like Figure 1 As shown, the counterweight mainly consists of a counterweight wheel and a counterweight block. However, the distance between the bearing end cover of the counterweight wheel of the conveyor belt under the trough and the guide column is only 10mm. Opening the bearing end cover for inspection and lubrication is extremely difficult. The machine must be stopped to lubricate with a lubricating gun, and the counterweight wheel must be replaced according to experience. The condition of the bearing cannot be properly and effectively controlled. The direct consequence is a short service life of the conveyor belt's counterweight wheel bearing. An analysis of the influencing factors revealed the following main reasons: First, the distance between the counterweight wheel and the column is too close, indicating an unreasonable equipment structure. Maintenance and inspection were not considered during installation, leading to difficulties in opening the bearing end cover and inspecting and lubricating the bearing. Second, during each maintenance check, the inspection and lubrication of the counterweight wheel bearing is only carried out when it is determined that the cover needs to be opened (due to abnormalities such as damaged bearing housing, worn journal, or bearing failure requiring the end cover to be broken). This involves welding, cutting the column, and using a chain hoist to pull the counterweight wheel out at an angle. The inspection and replacement of bearings are carried out in several ways. In other cases, the bearing replacement cycle is used as the basis for judgment. Bearings that have not yet reached their replacement cycle are simply lubricated without measuring the bearing clearance. Bearings that have reached their replacement cycle are directly replaced. Thirdly, lubrication of bearings can only be performed after the machine has stopped. For bearings with slightly poor sealing, insufficient lubrication will lead to an increase in temperature, which will further create a vicious cycle and accelerate the damage of the bearing. If the cycle is shortened and maintenance is frequent, production output will be reduced. Fourthly, the judgment of whether to replace bearings is based on experience and operating cycle. The control and management of bearing operation precision is not precise and cannot improve the service life of the equipment. Utility Model Content

[0004] To address the aforementioned technical problem of the difficulty in inspecting and lubricating the bearings of existing blast furnace conveyor belt counterweight rollers, an online lubrication and quick replacement device for conveyor belt counterweight rollers is provided.

[0005] The technical means adopted in this utility model are as follows:

[0006] An online lubrication and quick replacement device for a counterweight roller of a conveyor belt machine is provided. The conveyor belt machine includes a counterweight roller and guide columns located on both sides of the counterweight roller. A counterweight block is installed below the counterweight roller. The two ends of the central shaft of the counterweight roller are respectively mounted on a bearing seat through a counterweight roller bearing. The bearing seat is fixedly connected to the counterweight block.

[0007] The bearing end cover of the counterweight wheel bearing is provided with a bearing end cover oil injection hole, and an oil injection pipe is installed in the bearing end cover oil injection hole.

[0008] The guide column is divided into an upper column and a lower column. The top of the upper column is hinged to the support frame of the conveyor belt, and the bottom of the lower column is fixed to the ground. The upper column and the lower column are connected by a movable pin.

[0009] Furthermore, the connecting surfaces of the upper column and the lower column are mutually cooperating inclined surfaces.

[0010] Furthermore, the bottom of the upper column and the top of the lower column are respectively provided with pin sleeves for installing the L-shaped movable pin.

[0011] Furthermore, the top of the upper column is hinged to the support frame by bolts and nuts. The head of the bolt is inside the upper column, and the nut is welded and fixed to a threaded rod that passes through the mounting holes on the top of the upper column and the support frame, leaving a gap of 2-3mm between the top of the upper column and the support frame.

[0012] Furthermore, the end of the oil injection pipe is 500mm above the ground.

[0013] Furthermore, the height of the lower column is 500mm-1000mm.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The online lubrication and quick replacement device for the counterweight roller of the conveyor belt provided by this utility model adds a long oil injection pipe to the oil injection hole of the bearing end cover. Under the premise of ensuring personnel safety, it can realize the online lubrication of the counterweight roller bearing with an electric oil pump on a periodic basis without stopping the machine, and prevent the counterweight roller bearing from being worn and damaged due to lack of lubrication when the period expires.

[0016] 2. The online lubrication and quick replacement device for the counterweight roller of the conveyor belt provided by this utility model changes the connection between the top of the guide column and the support frame from a fixed connection to a hinged connection, and improves the traditional fixed column into a "movable" guide column. When it is necessary to open the bearing end cover for inspection or to replace the counterweight roller bearing, it is only necessary to rotate the upper column to create operating space. On the one hand, it makes the opening, inspection, lubrication, and replacement of bearings and the replacement of counterweight rollers much simpler and more convenient, which can extend the service life of bearings. On the other hand, it can also achieve replacement and maintenance work without cutting or welding the guide column, reducing operational risks and labor load, and improving operational efficiency.

[0017] Based on the above reasons, this utility model can be widely promoted in the field of blast furnace belt conveyors. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the counterweight wheel and guide column structure of the conveyor belt under the blast furnace trough in the existing technology.

[0020] Figure 2 This is a schematic diagram of the online lubrication and quick replacement device for the counterweight roller of the conveyor belt described in this utility model.

[0021] In the diagram: 1. Conveyor belt; 2. Counterweight wheel; 3. Guide column; 4. Counterweight block; 5. Bearing housing; 6. Bearing end cover oil injection hole; 7. Oil injection pipe; 8. Movable pin; 9. Pin sleeve; 10. Bolt; 11. Nut. Detailed Implementation

[0022] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0026] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0027] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0028] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0029] Example 1

[0030] like Figure 2 As shown, this utility model provides an online lubrication and quick replacement device for the counterweight roller of a conveyor belt machine. The conveyor belt machine includes a counterweight roller 2 and guide columns 3 located on both sides of the counterweight roller 2. The conveyor belt 1 of the conveyor belt machine is installed outside the counterweight roller 2. A counterweight block 4 is installed below the counterweight roller 2. The two ends of the central shaft of the counterweight roller 2 are respectively installed on a bearing seat 5 through a counterweight roller bearing. The bearing seat 5 is fixedly connected to the counterweight block 4.

[0031] The bearing end cover of the counterweight wheel bearing is provided with a bearing end cover oil injection hole 6, and an oil injection pipe 7 is installed in the bearing end cover oil injection hole 6.

[0032] The guide column 3 is divided into an upper column and a lower column. The top of the upper column is hinged to the support frame of the conveyor belt, and the bottom of the lower column is fixed to the ground. The upper column and the lower column are connected by a movable pin 8.

[0033] Furthermore, the connecting surfaces of the upper column and the lower column are mutually cooperating inclined surfaces, and the inclination angle (relative to the horizontal plane) of the inclined surfaces is 45°.

[0034] Furthermore, the bottom of the upper column and the top of the lower column are respectively provided with pin sleeves 9 for installing the L-shaped movable pin 8.

[0035] Furthermore, the top of the upper column is hinged to the support frame by an M36 bolt 10 and a nut 11. The head of the bolt 10 is inside the upper column, and the nut 11 is welded and fixed to a threaded rod that passes through the mounting hole on the top of the upper column and the support frame, leaving a gap of 2-3mm between the top of the upper column and the support frame, thereby forming a hinge and ensuring that the upper column can move.

[0036] Furthermore, the end of the oil injection pipe 7 is approximately 500mm above the ground.

[0037] Furthermore, the height of the lower column is 500mm-1000mm.

[0038] Based on long-term research and analysis of the working state of the counterweight roller, it is found that the vertical movement distance of the counterweight roller is very small during operation. The device described in this utility model adds a long oil injection pipe to the oil injection hole of the bearing end cover. This will not damage the oil pipe or affect the operation of the conveyor belt. The length of the oil injection pipe can be adjusted according to the different heights of the oil injection hole of the bearing end cover, ensuring that the length of the oil injection pipe is about 500mm from the ground. The device described in this application adds a long oil pipe to the oil injection hole of the counterweight roller, which enables the counterweight roller bearing to be oiled periodically by an electric oil pump without stopping the machine, while ensuring personnel safety. This prevents the counterweight roller bearing from being worn and damaged due to lack of oiling when the cycle is over.

[0039] Meanwhile, the device described in this utility model changes the connection between the top of the guide column and the support frame from a fixed connection to a hinged connection. The guide column is cut into upper and lower parts at a 45° angle using gas welding at a height of 500mm-1000mm from the ground. Then, 1.2-inch × 120mm pipes are welded to the bottom of the upper column and the top side of the lower column as pin sleeves. A φ30 × 300mm steel rod is used to make a movable pin to connect the upper and lower columns. This improves the traditional fixed column into a "movable" guide column. Using the "movable" guide column described in this application, when it is necessary to open the bearing end cover for inspection or to replace the counterweight wheel bearing, only the upper column needs to be rotated to create operating space (the upper column in the open state is as follows). Figure 2 As shown by the dashed line, this design makes opening the bearing cover, inspection, lubrication, replacement, and counterweight wheel replacement much simpler and more convenient, extending the bearing's service life. On the other hand, it eliminates the need to cut or weld the guide column to perform replacement and maintenance work, reducing operational risks and labor load, and improving operational efficiency.

[0040] The device described in this utility model was applied to three 1750m³ ironmaking plants at the Xichang Steel and Vanadium Plant. 3The blast furnace has 19 belt conveyors with counterweight wheels under the three blast furnace troughs. 38 oil injection pipes were added to the bearings at both ends of the counterweight wheels, and the guide columns were modified to be movable guide columns, resulting in better labor and production efficiency.

[0041] (1) Labor costs: There are a total of 38 sets of bearings for the counterweight wheel under the trough. The maintenance labor cost is calculated at RMB 59.88 per person per hour.

[0042] Before adopting the device described in this application: replacing each set of bearings requires setting up electric welding, cutting the column, hoisting (the crane cost is required by the manufacturer and is not calculated here), dismantling the gate and other auxiliary preparation work, which takes 6 people 4 hours / set. If 38 sets of bearings are replaced every year, the annual maintenance labor cost is: S1=38×6×4×59.88=54,600 yuan;

[0043] After adopting the device described in this application: the bearing service life reaches the normal service range of 2-5 years. Calculated at 2 years, an average of 38 / 2 sets of counterweight wheel bearings need to be replaced annually. There is no need for auxiliary preparation work such as cutting the column or hoisting and dismantling the gate. Each set of bearings only requires 3 people and 2 hours to replace. Therefore, the annual maintenance labor cost is: S2 = 19 × 3 × 2 × 59.88 = 0.68 million yuan; the potential benefit is: S = S1 - S2 = 5.46 - 0.68 = 4.78 million yuan.

[0044] (2) Production efficiency: After the improvement, the average maintenance time can be shortened by 2 hours (which can bring production forward by 2 hours). Calculated on an average of 20 times per year, the annual production efficiency can be calculated using the following formula:

[0045] Be1 = Y1i × Ti × Ai × Gi × Ci - Bi

[0046] Among them, Be1 - benefit of technological innovation, in ten thousand yuan; Y1i - reduction of downtime due to failure throughout the year after improvement, in hours; Ti - pig iron production per unit downtime, in t / h; Ai - pig iron profit, in ten thousand yuan / t, 200 yuan / ton; Gi - technological contribution coefficient, 0.7; Ci - effective operating rate, 95%; Bi - R&D investment, taken as 10,000 yuan.

[0047] Finally, we can obtain Be1 = 2 × 20 × 200 × 200 × 0.7 × 0.95 - 1 = 1,054,000 yuan;

[0048] Therefore, the total annual benefit is: Be = S + Be1 = 4.78 + 105.4 = 110.18 million yuan.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An online lubrication and quick replacement device for a counterweight roller of a conveyor belt machine, the conveyor belt machine including a counterweight roller and guide columns located on both sides of the counterweight roller, a counterweight block installed below the counterweight roller, and both ends of the central shaft of the counterweight roller being mounted on a bearing seat via a counterweight roller bearing, the bearing seat being fixedly connected to the counterweight block, characterized in that: The bearing end cover of the counterweight wheel bearing is provided with a bearing end cover oil injection hole, and an oil injection pipe is installed in the bearing end cover oil injection hole. The guide column is divided into an upper column and a lower column. The top of the upper column is hinged to the support frame of the conveyor belt, and the bottom of the lower column is fixed to the ground. The upper column and the lower column are connected by a movable pin.

2. The online lubrication and quick replacement device for the counterweight roller of a conveyor belt as described in claim 1, characterized in that, The connecting surfaces of the upper column and the lower column are mutually cooperating inclined surfaces.

3. The online lubrication and quick replacement device for the counterweight roller of a conveyor belt as described in claim 1, characterized in that, The bottom of the upper column and the top of the lower column are respectively provided with pin sleeves for installing the L-shaped movable pin.

4. The online lubrication and quick replacement device for the counterweight roller of a conveyor belt according to claim 1, characterized in that, The top of the upper column is hinged to the support frame by bolts and nuts. The head of the bolt is inside the upper column, and the nut is welded and fixed to a threaded rod that passes through the mounting hole on the top of the upper column and the support frame, leaving a gap of 2-3mm between the top of the upper column and the support frame.

5. The online lubrication and quick replacement device for the counterweight roller of a conveyor belt as described in claim 1, characterized in that, The end of the oil injection pipe is 500mm above the ground.

6. The online lubrication and quick replacement device for the counterweight roller of a conveyor belt according to claim 1, characterized in that, The height of the lower column is 500mm-1000mm.

Images