Blast furnace cooling water pump impeller dismounting device

Abstract

The utility model provides a blast furnace cooling water pump impeller dismounting device which comprises a base, a positioning support is arranged at one end of the base, and a supporting plate is arranged at the other end of the base. A groove is formed in the positioning bracket; the guide rod, the hydraulic cylinder, the movable top frame and the electric push rod are located between the positioning support and the supporting plate. The two ends of the two guide rods are fixed to the positioning support and the supporting plate respectively. The movable top frame is installed on the two guide rods in a sliding mode through guide rod installation holes formed in the two sides of the movable top frame. The fixed end of the hydraulic cylinder is fixedly installed on the movable top frame, and a piston rod faces the positioning support. The electric push rod is located between the movable top frame and the supporting plate, the push rod at the front end is fixedly connected with the movable top frame, and the rear end of the electric push rod is fixedly installed on the supporting plate. The utility model solves the problems that the impeller is easy to damage and the dismounting efficiency is low in the conventional dismounting mode of the blast furnace cooling water pump impeller.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, and more specifically, to a device for disassembling and assembling a blast furnace cooling water pump impeller. Background Technology

[0002] The blast furnace in the ironmaking plant is equipped with an independent water cooling system, which mainly consists of low-pressure pumps, medium-pressure pumps, high-pressure pumps, and circulating pumps. These pumps supply cooling water to the blast furnace. During the cooling water circulation process, additives are added to prevent scaling and blockage in the pipes. These additives contain corrosive components, which significantly corrode the pump impellers during circulation. Because the pump impeller and shaft have an interference fit, a large diameter, and a long shaft, disassembly requires damaging the impeller, which easily damages and deforms the shaft, resulting in low maintenance efficiency.

[0003] Currently, when overhauling and replacing water pump impellers, there are problems with disassembly and installation difficulties. The only way to remove the impeller is by destructive removal. During the disassembly process, the use of cutting and other methods can easily damage the impeller shaft, rendering it unusable. This greatly increases the difficulty of the operation, wastes the workers' time, and increases their labor intensity. Utility Model Content

[0004] In view of the above-mentioned technical problems that the existing blast furnace cooling water pump impeller disassembly and assembly methods are prone to damage to the impeller and have low disassembly efficiency, a blast furnace cooling water pump impeller disassembly and assembly device is provided.

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

[0006] A blast furnace cooling water pump impeller disassembly and assembly device includes a base, one end of which is provided with a positioning bracket and the other end with a support plate; the positioning bracket is provided with a groove.

[0007] The disassembly and assembly device also includes a guide rod, a hydraulic cylinder, a movable top frame, and an electric push rod located between the positioning bracket and the support plate;

[0008] The two ends of the two guide rods are respectively fixed to the positioning bracket and the support plate;

[0009] The movable top frame is slidably mounted on the two guide rods through guide rod mounting holes on both sides; the fixed end of the hydraulic cylinder is fixedly mounted on the movable top frame, with the piston rod facing the positioning bracket;

[0010] The electric push rod is located between the movable top frame and the support plate, with the front end of the push rod fixedly connected to the movable top frame and the rear end fixedly installed on the support plate.

[0011] Furthermore, the positioning bracket has an upward-facing U-shaped groove.

[0012] Furthermore, the movable top frame is provided with an installation space for accommodating the hydraulic cylinder. The fixed end of the hydraulic cylinder is fixedly installed on the side wall of the installation space, and the piston rod faces the positioning bracket. A through hole is provided on the movable top frame at a position corresponding to the piston rod of the hydraulic cylinder, allowing the piston rod of the hydraulic cylinder to pass through.

[0013] Furthermore, the guide rod is provided with a plurality of positioning pin mounting holes spaced apart, and the position of the movable top frame on the guide rod can be limited by installing positioning pins in the positioning pin mounting holes.

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

[0015] The blast furnace cooling water pump impeller disassembly and assembly device provided by this utility model can quickly solve the problem of disassembling and assembling the blast furnace water pump impeller. While ensuring the function and installation accuracy of the equipment and facilities without damaging the impeller, it reduces the labor intensity of maintenance, improves work efficiency, and reduces the downtime of the unit. The disassembly and assembly device is easy to operate, economical, practical and safe.

[0016] Based on the above reasons, this utility model can be widely promoted in blast furnace equipment. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the blast furnace cooling water pump impeller disassembly and assembly device of the present invention.

[0019] Figure 2 This is a schematic diagram showing the disassembly and assembly device of this utility model in use.

[0020] In the diagram: 1. Positioning bracket; 2. Guide rod; 3. Hydraulic cylinder; 4. Movable top frame; 5. Positioning pin; 6. Electric push rod; 7. Base; 8. Support plate; 9. Axle; 10. Impeller. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] Example 1

[0029] like Figure 1 As shown, this utility model provides a blast furnace cooling water pump impeller disassembly and assembly device, including a base 7, a positioning bracket 1 at one end of the base 7 and a support plate 8 at the other end; the positioning bracket 1 is provided with a groove for placing the wheel shaft 9 of the cooling water pump impeller 10;

[0030] The disassembly and assembly device also includes a guide rod 2, a hydraulic cylinder 3, a movable top frame 4, and an electric push rod 6 located between the positioning bracket 1 and the support plate 8;

[0031] The two ends of the two guide rods 2 are respectively fixed to the positioning bracket 1 and the support plate 8;

[0032] The movable top frame 4 is slidably mounted on the two guide rods 2 through guide rod mounting holes on both sides, and the movable top frame 4 can move back and forth along the guide rods 2; the fixed end of the hydraulic cylinder 3 is fixedly mounted on the movable top frame 4, and the piston rod faces the positioning bracket 1;

[0033] The electric push rod 6 is located between the movable top frame 4 and the support plate 8, with the front end of the push rod fixedly connected to the movable top frame 4 and the rear end fixedly installed on the support plate 8; the electric push rod 6 is used to drive the movable top frame 4 to move back and forth along the guide rod 2 by pushing the rod.

[0034] Furthermore, the positioning bracket 1 has an upward-facing U-shaped groove for placing the axle 9 of the cooling water pump impeller 10.

[0035] Furthermore, the movable top frame 4 is provided with an installation space for accommodating the hydraulic cylinder 3. The fixed end of the hydraulic cylinder 3 is fixedly installed on the side wall of the installation space, and the piston rod faces the positioning bracket 1. A through hole is provided on the movable top frame 4 at the position corresponding to the piston rod of the hydraulic cylinder 3, allowing the piston rod of the hydraulic cylinder 3 to pass through.

[0036] Furthermore, the guide rod 2 is provided with a plurality of positioning pin mounting holes spaced apart. By installing positioning pins 5 in the positioning pin mounting holes, the position of the movable top frame 4 on the guide rod 2 can be limited.

[0037] Furthermore, the hydraulic cylinder 3 can be an HSG50-200 / 50 hydraulic cylinder, and the electric push rod 6 can be a SY-A04B electric push rod.

[0038] The blast furnace cooling water pump impeller disassembly and assembly device of this utility model is designed with a special positioning bracket 1 to address the problem of difficult placement during the replacement of the blast furnace cooling water pump impeller. The impeller 10 and the shaft 9 of the cooling water pump are transferred by a hoist on a crane, so that the impeller 10 is placed between the movable top frame 4 and the positioning bracket 1, and the shaft 9 is placed in the U-shaped groove of the positioning bracket 1 for operation. The U-shaped groove and the hoist work together to ensure that the impeller 10 and the shaft 9 will not roll during operation, making the maintenance of the impeller 10 more convenient.

[0039] When removing the impeller, first control the electric push rod 6 to move the movable top frame 4 backward, so that there is enough space between the positioning bracket 1 and the movable top frame 4. Then, after removing the cooling water pump impeller 10 and wheel shaft 9 from the centrifugal pump, use the hoist on the crane to lift and place them on the positioning bracket 1. After removing the bearing and locking nut on the impeller 10, control the electric push rod 6 to push the movable top frame 4 towards the wheel shaft 9. Then, control the hydraulic cylinder 3 to work and push the wheel shaft 9 out of the impeller 10. The removed impeller 10 and wheel shaft 9 are lifted out of the device by the hoist.

[0040] When installing the impeller, first control the electric push rod 6 to drive the movable top frame 4 to move backward, so that there is enough space between the positioning bracket 1 and the movable top frame 4 to place the new wheel shaft 9. Then, use the hoist on the crane to place the new impeller 10 and wheel shaft 9 between the positioning bracket 1 and the movable top frame 4 in sequence. After aligning the shaft with the center hole of the impeller, control the electric push rod 6 to push the movable top frame 4 forward, and control the hydraulic cylinder 3 to press the new wheel shaft 9 into the center hole of the impeller until the wheel shaft is installed in place. After the assembly is completed, the impeller and wheel shaft are lifted out of the device by the hoist.

[0041] The blast furnace cooling water pump impeller disassembly and assembly device described in this utility model enables safe and efficient impeller removal during disassembly, and similarly, safe and efficient impeller installation during installation. Using this blast furnace cooling water pump impeller disassembly and assembly device offers several advantages: first, it eliminates traditional hazardous operating methods, ensuring worker safety and reducing safety risks; second, it reduces the workload of maintenance personnel, significantly lowering labor intensity and ensuring the mental well-being of workers; and third, it minimizes equipment downtime, providing strong support for the smooth operation of the blast furnace. This device is applicable to the disassembly and assembly of impellers for various pump models and can be extended to similar impeller replacement applications.

[0042] The blast furnace cooling water pump impeller disassembly and assembly device described in this application was applied to the disassembly and assembly of cooling water pump impellers for three blast furnaces at the Xichang Steel and Vanadium Ironmaking Plant, achieving good labor and production efficiency.

[0043] (1) Labor efficiency: When using the old-to-new replacement method to repair water pump impellers, it takes 6 people 12 hours to repair each impeller. After the improvement, labor and time are saved in impeller disassembly and assembly, which only requires 4 people 8 hours. Calculated at a unit labor rate of 59.88 yuan, the labor cost savings for 14 water pumps repaired once every 2 years is as follows:

[0044] According to the Panzhihua Iron and Steel Group's profit calculation formula: maintenance profit = (cost required before maintenance - cost required after maintenance) × contribution coefficient - development cost, with the contribution coefficient taken as 0.9. Then, the annual labor cost saved after the improvement is: S labor = (6*12*14*0.5-4*8*14*0.5)*3*59.88*0.9-1000 = 26,100 yuan;

[0045] (2) Production benefits: Based on an iron output of ≥190t / h per furnace, the profit per ton of iron is 200 yuan. After the cooling water pumps of the three blast furnaces are overhauled using the new operating method, the annual time saved is (12-8)*14*0.5*3=84 hours. The production benefits can be calculated according to the following formula:

[0046] S production=Y1i*Ti*Ai*Gi*Ci-Bi

[0047] Among them: S - Production - Benefits from technological innovation, RMB 10,000; Y1i - Annual reduction in downtime after improvement, h; Ti - Coal powder output per unit downtime, t / h; Ai - Benefit per ton of iron, RMB 200 / ton; Gi - Technological contribution coefficient, 0.7; Ci - Effective operating rate 90%; Bi - R&D investment, RMB 1,000.

[0048] Finally, we can obtain S production = 84 * 190 * 0.02 * 0.7 * 0.9 - 0.1 = 2,009,000 yuan;

[0049] S = 2.61 + 200.9 = 203.51 million yuan.

[0050] 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. A device for disassembling and assembling a blast furnace cooling water pump impeller, characterized in that, Includes a base, one end of which is provided with a positioning bracket and the other end with a support plate; the positioning bracket is provided with a groove; The disassembly and assembly device also includes a guide rod, a hydraulic cylinder, a movable top frame, and an electric push rod located between the positioning bracket and the support plate; The two ends of the two guide rods are respectively fixed to the positioning bracket and the support plate; The movable top frame is slidably mounted on the two guide rods through guide rod mounting holes on both sides; the fixed end of the hydraulic cylinder is fixedly mounted on the movable top frame, with the piston rod facing the positioning bracket; The electric push rod is located between the movable top frame and the support plate, with the front end of the push rod fixedly connected to the movable top frame and the rear end fixedly installed on the support plate.

2. The device according to claim 1, wherein The positioning bracket has an upward-facing U-shaped groove.

3. The device according to claim 1, wherein The movable top frame is provided with an installation space for accommodating the hydraulic cylinder. The fixed end of the hydraulic cylinder is fixedly installed on the side wall of the installation space, and the piston rod faces the positioning bracket. A through hole is provided on the movable top frame at the position corresponding to the piston rod of the hydraulic cylinder, allowing the piston rod of the hydraulic cylinder to pass through.

4. The apparatus according to claim 1, wherein The guide rod is provided with a plurality of positioning pin mounting holes spaced apart. By installing positioning pins in the positioning pin mounting holes, the position of the movable top frame on the guide rod can be limited.

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