Protective cover for dynamic balancing machine

Abstract

The utility model relates to a protective cover for a dynamic balancing machine, which is used for a dynamic balancing test before a fan leaves a factory. Comprising first square steel, second square steel and a screen frame, the first square steel is fixed to the side wall of a building, the second square steel is fixed to the ground, the upper end of the screen frame is in sliding connection with the first square steel, the lower end of the screen frame is in rolling connection with the second square steel, and cut-off triangular frames are welded to the two ends of the second square steel. The protective cover is installed outside when a fan leaves a factory for dynamic balance testing, and when an impeller rotates, if the weight testing block is loosened and thrown out, field operators are protected, and the situation that the weight testing block flies out and accidentally hurts the operators, and safety accidents are caused is prevented.

Description

Technical Field

[0001] The utility model relates to a safety protection device, in particular to a protection cover for a dynamic balancing machine, which is used for the dynamic balancing test of a rotor (impeller) of a fan before it leaves the factory. Background Art

[0002] Centrifugal fans play an important role in industrial production and equipment operation, and can be widely used in steel, cement, glass, metallurgy and other industries. The impeller is the core component of the centrifugal fan. When the prime mover drags the impeller to rotate, the impeller works on the gas, allowing the gas to gain energy. The gas leaves the impeller and is discharged through the casing. Impeller imbalance can cause the fan to produce severe vibration and noise, and even cause damage to components in severe cases, affecting work efficiency and posing safety hazards. Therefore, the dynamic balance test of the rotor (impeller) before the fan leaves the factory is an important process. When using a dynamic balancing machine to test the dynamic balance of the rotor (impeller), if the rotor (impeller) is unbalanced, it is necessary to add a test weight to the rotor (impeller) for counterweighting before testing. If the test weight is not installed firmly or becomes loose during rotation, there is a risk that the test weight will fly out during the dynamic balancing process. In order to ensure safe production and prevent safety accidents, protection is required, but manufacturers generally do not set up protective devices, which poses a very large safety hazard. Summary of the invention

[0003] The utility model aims to provide a protective cover for a dynamic balancing machine, which can prevent a test weight from flying out and accidentally injuring on-site workers when a rotor (impeller) of a fan is subjected to a dynamic balancing test.

[0004] The technical solution of this utility model:

[0005] A protective cover for a dynamic balancing machine comprises a first square steel, a second square steel and a mesh frame, wherein the first square steel is fixed on a side wall of a building, the second square steel is fixed on the ground, the upper end of the mesh frame is slidably connected to the first square steel, the lower end of the mesh frame is rollingly connected to the second square steel, and cut-off tripods are welded at both ends of the second square steel.

[0006] Beneficial effects of the utility model:

[0007] 1. The protective cover of this application is installed outside the rotor (impeller) of the fan for dynamic balancing test before leaving the factory. When the impeller rotates, if the test weight is loose and thrown out, it protects the on-site operators and prevents the test weight from flying out and accidentally injuring people, causing safety accidents.

[0008] 2. The protective cover of the present application is installed on the wall inside the factory, and the tested rotor (impeller) is covered inside. The protective cover can slide back and forth, making it easy to disassemble and assemble the rotor (impeller).

[0009] 3. This application utilizes the side walls of the factory and the protective cover to protect both sides of the rotating rotor (impeller) to prevent the test weight from flying out. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0011] Figure 1 This is a schematic diagram of the overall structure of the protective cover for the dynamic balancing machine in this application.

[0012] Figure 2 This is an enlarged view of the connection part between the protective cover mesh frame and the first square steel for the dynamic balancing machine of this application.

[0013] Figure 3 This is an enlarged view of the first sliding component of the protective cover for the dynamic balancing machine of this application.

[0014] Figure 4 This is an enlarged view of the second rolling component of the protective cover for the dynamic balancing machine of this application.

[0015] Reference numerals:

[0016] The first square steel 1; the second square steel 2; the mesh frame 3; the tripod 4; the first sliding assembly 5; the second rolling assembly 6; the connecting column 51; the long groove 52; the fixing sleeve 53; the fixing plate 54; the pulley 55; the nut 56; the bracket 61; the roller 62; and the bolt 63. DETAILED DESCRIPTION

[0017] In order to solve the problem of the test weight being thrown out during the dynamic balancing test of the fan in the background technology, a protective cover for a dynamic balancing machine is specially invented in this application to protect on-site workers and prevent accidental injuries. The rotor (impeller) is one of the important components of the fan, and the dynamic balancing test is a necessary step to correct the imbalance of the impeller. The purpose is to eliminate imbalance, reduce vibration, reduce noise, improve the stability of the rotor (impeller) operation, avoid safety accidents caused by mechanical failures, and ensure that the rotor (impeller) can run smoothly. During the dynamic balancing process of the centrifugal fan rotor (impeller) in the factory, test weights need to be installed on both sides of the rotor (impeller) to determine the size of the rotor (impeller) imbalance. The dynamic balancing accuracy reaches below 4.0mm / s. There are usually several ways to install test weights: 1. Fix it on the rotor (impeller) by spot welding, 2. Make a clamp and fasten it to the rotor (impeller) with bolts, 3. Adsorb it on the rotor (impeller) by a strong magnetic test block. When the rotor (impeller) rotates on the balancing machine, the test weight will generate a large centrifugal force. The above test weight installation methods all have the risk of falling off, which poses a safety hazard and may cause safety accidents. The utility model is a movable protective cover designed to prevent the test weight from flying out. There are only two directions for the test weight to fall off and fly out, namely clockwise or counterclockwise in the direction of rotation of the impeller. The utility model is a semi-enclosed movable protective cover for a balancing machine made by using a workshop balancing machine close to the wall in one direction. It has the advantages of saving space, not requiring a separate balancing machine studio, convenient loading and unloading of workpieces, and good protective effect.

[0018] The application is described in detail below with reference to the accompanying drawings:

[0019] like Figure 1 As shown, a protective cover for a dynamic balancing machine includes a first square steel 1, a second square steel 2, and a mesh frame 3. The first square steel 1 is fixed on the side wall of the building, the second square steel 2 is fixed on the ground, and the second square steel can be an angle steel. A connecting plate is welded at every 500mm interval at the bottom of the angle steel, and is fixedly connected to the foundation ground with steel expansion bolts. The upper end of the mesh frame 3 is slidably connected to the first square steel 1, and the lower end of the mesh frame 3 is rollingly connected to the second square steel 2 (or angle steel). Cut-off tripods 4 are welded at both ends of the second square steel 2 (or angle steel). The mesh frame 3 (similar to a right-angle frame as a whole) is in the form of a combination of a frame and a mesh plate. The mesh plate is riveted on the outside of the frame, and the frame is connected to the first square steel and the second square steel.

[0020] like Figure 2 , 3As shown, the upper end of the mesh frame is slidably connected to the first square steel through a first sliding component 5. The first sliding component 5 includes a connecting column 51. The connecting column 51 is welded on the upper end of the mesh frame. The connecting column passes upward through a longitudinal long groove 52 at the bottom end of the first square steel. The upper end of the connecting column 51 is locked and fixed by a nut 56. A fixing sleeve 53 is sleeved on the connecting column. Fixed plates are fixed on both sides of the fixing sleeve. A pulley 55 is installed on the fixing plate 54 through an axis, and the pulley slides in the first square steel.

[0021] like Figure 4 As shown, the lower end of the mesh frame is connected to the second square steel 2 (or angle steel) by rolling through the second rolling assembly 6. The second rolling assembly 6 includes a bracket 61, a roller 62 (a V-shaped roller is used when the second square steel is an angle steel), a bearing and a bolt 63. The bracket 61 is fixedly mounted under the frame, the bearing is mounted in the roller, and the bolt 63 passes through the mounting hole and the bearing on the bracket. The other end of the bolt connects the bracket and the roller through a nut. The pulley is hung in the track groove. When the protective cover is subjected to thrust, the roller and the pulley drive the protective cover to move. Due to the weight of the protective cover itself, it can stay still at any position without being subjected to thrust.

[0022] Installation and usage process:

[0023] The first square steel of the protective cover of the present application is fixed on the wall in the factory, the second square steel is fixed on the ground, the upper end of the mesh frame with the mesh is installed on the first square steel, the roller at the lower end of the frame is placed on the second square steel, and the roller rolls back and forth on the second square steel. Before the dynamic balancing test begins, push the mesh frame to move to one side along the first square steel and the second square steel, install the impeller on the dynamic balancing machine, and then move the mesh frame to the position facing the rotor (impeller), and then perform the rotor (impeller) dynamic balancing test in the normal order. The protective cover can effectively protect the staff from harm.

[0024] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the above and does not deviate from the technical solution of the present invention, and designs a structure and implementation similar to the technical solution based on the above implementation examples without creativity, they shall all fall within the protection scope of the present invention.

Claims

1. A protective cover for a dynamic balancing machine, characterized in that: It includes a first square steel, a second square steel, and a mesh frame. The first square steel is fixed on the side wall of the building, the second square steel is fixed on the ground, the upper end of the mesh frame is slidably connected to the first square steel, the lower end of the mesh frame is rollingly connected to the second square steel, and both ends of the second square steel are welded with cut-off tripods.

2. A protective cover for a dynamic balancing machine according to claim 1, characterized in that: The upper end of the mesh frame is slidably connected to the first square steel through a first sliding component. The first sliding component includes a connecting column. A connecting column is welded to the upper end of the mesh frame. The connecting column passes upward through the longitudinal long groove at the bottom end of the first square steel. The upper end of the connecting column is locked and fixed by a nut. A fixing sleeve is sleeved on the connecting column. Fixed plates are provided on both sides of the fixing sleeve. Pullies are installed on the fixing plates. The pulleys slide in the first square steel.

3. The protective cover for a dynamic balancing machine according to claim 1, characterized in that: The lower end of the mesh frame is rollingly connected to the second square steel through a second rolling assembly. The second rolling assembly includes a bracket, a roller, a bearing and a bolt. The bracket is fixed under the frame, the bearing is installed in the roller, the bolt passes through the mounting hole and the bearing on the bracket, and the other end of the bolt is locked and fixed by a nut.

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