A valve sandblasting device

Abstract

This utility model discloses a valve sandblasting device, including a housing, a rotating support mechanism, and a sandblasting mechanism. The rotating support mechanism, located inside the housing, consists of a support disc, a rotating disc, a positioning rod, and a magnetic levitation bearing unit. The magnetic levitation bearing unit includes a lower magnetic ring array mounted on the upper surface of the support disc and an upper magnetic ring array fixed to the lower surface of the rotating disc. The opposing magnetic poles of the two arrays are identical, and magnetic repulsion suspends the rotating disc above the support disc, maintaining non-contact rotation. This structure effectively prevents jamming, wear, and vibration problems caused by sand particle intrusion, and has the advantages of high precision, high stability, and maintenance-free operation.

Description

Technical Field

[0001] This utility model relates to the field of valve surface treatment technology, specifically to a valve sandblasting device. Background Technology

[0002] Sandblasting is a key process in valve surface treatment, used to remove rust, scale, and increase surface roughness to facilitate coating adhesion. Currently, traditional valve sandblasting equipment mostly uses mechanical support structures, such as the utility model patent application number CN2024212199212, which uses a pulley system rolling in a groove to drive the valve to rotate.

[0003] However, this mechanical contact structure has inherent drawbacks under harsh sandblasting conditions: the high-speed abrasive particles easily penetrate the gaps between the pulleys and the grooves, causing pulley jamming, abnormal wear, and severe equipment vibration. This not only affects the uniformity and quality of the sandblasting process but also leads to frequent downtime for maintenance, increasing production costs and equipment downtime.

[0004] Therefore, there is an urgent need for a new type of valve sandblasting support solution that can fundamentally eliminate sand particle interference and operate extremely smoothly. Utility Model Content

[0005] 1. Technical problem to be solved by the utility model The purpose of this utility model is to solve the technical problems existing in the prior art and provide a valve sandblasting device, which aims to completely solve the problems of mechanical jamming, wear and vibration caused by sand particle intrusion, and realize high-precision, high-stability and maintenance-free valve sandblasting operation.

[0006] 2. Technical Solution To solve the above problems, the technical solution provided by this utility model is as follows: A valve sandblasting device includes a housing, a rotating support mechanism, and a sandblasting mechanism. The rotating support mechanism is located inside the housing. The rotating support mechanism includes a support disk fixedly installed inside the housing; a rotating disk driven by a servo motor and located directly above the support disk; a positioning rod disposed on the rotating disk for clamping the valve to be processed; and a magnetic levitation bearing unit, which consists of a lower magnetic ring array fixedly disposed on the upper surface of the support disk and an upper magnetic ring array fixedly disposed on the lower surface of the rotating disk and corresponding to the lower magnetic ring array. The magnetic poles of the upper and lower magnetic ring arrays opposite each other have the same polarity, generating a repulsive force that suspends the rotating disk above the support disk and maintains a non-contact state.

[0007] Preferably, both the lower magnetic ring array and the upper magnetic ring array contain at least two concentric ring magnet groups, and the magnetic poles of the inner and outer ring magnet groups are arranged in opposite directions.

[0008] Preferably, both the lower magnetic ring array and the upper magnetic ring array are neodymium iron boron permanent magnets.

[0009] Preferably, both the lower magnetic ring array and the upper magnetic ring array have an anti-corrosion coating on their surfaces.

[0010] Preferably, it further includes a limiting ring, which is fixedly connected to the outer periphery of the rotating disk and extends downward to form a cylindrical structure surrounding the outer periphery of the supporting disk.

[0011] Preferably, a radial gap is reserved between the inner wall of the limiting ring and the outer edge of the supporting disk.

[0012] Preferably, the rotating disk, the supporting disk, and the limiting ring together form an inner cavity, and the inner cavity is further included with an air supply assembly connected to the inner cavity.

[0013] Preferably, the support disc is connected to the inner wall of the box body by a plurality of support rods.

[0014] 3. Beneficial effects Compared with the prior art, the technical solution provided by this utility model has the following advantages: Non-contact magnetic levitation support fundamentally eliminates mechanical friction pairs, preventing sand particles from causing any jamming or blockage, thus revolutionizing equipment reliability.

[0015] By eliminating sources of mechanical vibration, the rotating disc operates extremely smoothly, ensuring the uniformity and consistency of sandblasting on the valve surface and significantly improving product quality.

[0016] No contact means no wear, and the main components have no consumables, which greatly reduces the long-term maintenance and operating costs of the equipment.

[0017] Servo motors operate in an environment with near-zero frictional resistance, enabling more precise control of rotational speed and thus fine adjustment of sandblasting process parameters. Attached Figure Description

[0018] Figure 1 This is a cross-sectional schematic diagram of a valve sandblasting device according to Embodiment 1 of this utility model; Figure 2 This is a cross-sectional schematic diagram of a valve sandblasting device according to Embodiment 2 of this utility model; 1-Box body; 2-Rotating support mechanism; 21-Supporting disc; 22-Servo motor; 23-Rotating disc; 24-Positioning rod; 25-Lower magnetic ring array; 26-Upper magnetic ring array; 27-Limiting ring; 28-Air supply assembly; 3-Sandblasting mechanism. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit the scope of protection of this utility model.

[0020] It should be noted that when a component is referred to as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component. Furthermore, when a component is considered to be "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in the prior art and will not be elaborated further here. When a component is perpendicular or approximately perpendicular to another component, it means that the ideal state is perpendicularity, but due to manufacturing and assembly effects, there may be a certain degree of perpendicularity error. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only and do not represent the only possible implementation.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] The terms "first" and "second" in this utility model do not represent specific quantities or orders, but are merely used to distinguish names.

[0023] Example 1 Combined with appendix Figure 1 The valve sandblasting device of this embodiment includes a housing 1, a rotating support mechanism 2 and a sandblasting mechanism 3.

[0024] In this embodiment, the housing 1 is a sealed welded structure with an openable side door 8 on one side and a visualization window 9 on the front for observing the internal sandblasting process. A sand collection hopper is provided at the bottom inside the housing 1 for recovering sandblasting materials.

[0025] In this embodiment, the rotating support mechanism 2 is located at the center inside the housing 1. Its support disc 21 is fixedly installed on the inner wall of the housing 1 by several circumferentially evenly distributed support rods. This design can effectively disperse structural stress and ensure overall rigidity. The servo motor 22 is fixedly installed at the center above the support disc 21 by a flange. Its output axis is connected upward to the rotating disc 23. The rotating disc 23 is located directly above the support disc 21. It is rigidly connected to the output shaft of the servo motor 22 by an elastic coupling, so that it can be precisely driven to rotate by the servo motor 22. A positioning rod 24 is welded at the center of the upper surface of the rotating disc 23 for quick positioning and clamping of the valve to be processed, ensuring that the valve is coaxial with the rotating disc 23.

[0026] In this embodiment, the rotating support mechanism 2 is equipped with a magnetic levitation unit, which consists of a lower magnetic ring array 25 and an upper magnetic ring array 26. The lower magnetic ring array 25 is fixedly embedded in the upper surface of the support disk 21 by bonding with high-strength epoxy resin and supplementing with mechanical pressure plates. The upper magnetic ring array 26 is fixedly embedded in the lower surface of the rotating disk 23 in the same way. The upper and lower magnetic ring arrays are strictly coaxially aligned.

[0027] Specifically, both the lower magnetic ring array 25 and the upper magnetic ring array 26 contain two concentric ring magnet groups, namely an inner magnetic ring and an outer magnetic ring. The magnetic rings are made of N52 grade neodymium iron boron permanent magnets, and their surfaces are nickel-plated to prevent corrosion from moisture and dust in the sandblasting environment. The top surface of the inner magnetic ring of the lower magnetic ring array 25 is the N pole, and the top surface of its outer magnetic ring is the S pole. Correspondingly, the bottom surface of the inner magnetic ring of the upper magnetic ring array 26 is the N pole, and the bottom surface of its outer magnetic ring is the S pole. This staggered polarity arrangement of "inner same and outer opposite" not only generates a strong axial repulsive force between the upper and lower magnetic ring arrays to support the rotating disk 23 and its load, but also forms a stable radial "magnetic trap" to provide the system with an automatic centering restoring force and achieve stable levitation.

[0028] To further ensure the safety of the system during start-up, shutdown, or impact from external forces, this embodiment also includes a limiting ring 27. This limiting ring 27 is fixedly connected to the outer periphery of the rotating disk 23 via a sealing ring and bolts, and extends downwards to form a cylindrical structure surrounding the outer periphery of the supporting disk 21. A uniform radial gap of 1.5mm is reserved between the inner wall of the limiting ring 27 and the outer edge of the supporting disk 21. This structure allows the rotating disk 23, the supporting disk 21, and the limiting ring 27 to collectively form a relatively sealed inner cavity, protecting the core magnetic levitation bearing unit within. The rotating limiting ring 27 can prevent most sand and dust from entering the cavity due to centrifugal force, and can also achieve final limiting through mechanical contact before the rotating part deviates significantly, preventing magnetic ring collision.

[0029] In this embodiment, the sandblasting mechanism 3 includes a sandblasting gun 32 fixed in the housing 1 by a bracket, and a pipeline connected to an external air source and an abrasive chamber.

[0030] Work process: The operator opens the side door, places the valve workpiece onto the positioning rod 24 and fixes it, then closes the side door 8. At this time, the rotating disk 23 is stably suspended under the action of magnetic force. The servo motor 22 is started to drive the rotating disk 23 and the valve to rotate at a preset speed. Then the sandblasting mechanism 3 is started, and compressed air carrying abrasive (such as brown corundum or ceramic sand) is sprayed out at high speed from the sandblasting gun 32 to uniformly treat the surface of the rotating valve. The operator can observe the processing through the visualization window and control the processing effect by adjusting the speed of the servo motor and the sandblasting parameters. After the processing is completed, the sandblasting mechanism and the servo motor are turned off in sequence. After the rotation stops, the workpiece is taken out.

[0031] Example 2 This embodiment is a further optimization based on Embodiment 1, aiming to achieve an even more extreme dustproof effect.

[0032] like Figure 2 As shown, this embodiment adds an air supply component 28, which includes a miniature air pump and a filter. Its outlet is connected to the inner cavity formed by the rotating disk 23, the support disk 21 and the limiting ring 27 through a rotary joint, specifically connected to the support disk 21.

[0033] During operation, the air supply assembly 28 continuously injects clean, dry air with a slight positive pressure into the inner cavity. This airflow evenly overflows outward from the 1.5mm radial gap, effectively preventing external air rich in sand and dust from entering the inner cavity. This provides a positive pressure clean air curtain protection for the magnetic levitation unit, completely eliminating any possibility of sand and dust intrusion and accumulation, making it suitable for applications with extremely high reliability requirements.

[0034] In summary, this invention fundamentally solves the problems of sand grain jamming and wear by replacing mechanical contact support with passive magnetic levitation bearings, thus achieving high-precision, high-stability, and high-reliability operation of valve sandblasting.

[0035] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A valve sandblasting device, comprising a housing, a rotating support mechanism, and a sandblasting mechanism, wherein the rotating support mechanism is located inside the housing, characterized in that: The rotating support mechanism includes The support disc is fixedly installed inside the box. A rotating disk, driven by a servo motor, is positioned directly above the supporting disk; A positioning rod is provided on the rotating disk for clamping the valve to be processed; The magnetic levitation bearing unit consists of a lower magnetic ring array fixedly disposed on the upper surface of the supporting disk and an upper magnetic ring array fixedly disposed on the lower surface of the rotating disk and corresponding to the lower magnetic ring array; the magnetic poles of the upper magnetic ring array and the lower magnetic ring array have the same polarity on their opposite surfaces, generating a repulsive force, which makes the rotating disk levitate above the supporting disk and maintain a non-contact state.

2. The valve sandblasting device according to claim 1, characterized in that: Both the lower magnetic ring array and the upper magnetic ring array contain at least two concentric ring magnet groups, and the magnetic poles of the inner and outer ring magnet groups are arranged in opposite directions.

3. The valve sandblasting device according to claim 2, characterized in that: Both the lower and upper magnetic ring arrays are neodymium iron boron permanent magnets.

4. A valve sandblasting device according to claim 2, characterized in that: Both the lower and upper magnetic ring arrays have anti-corrosion coatings on their surfaces.

5. A valve sandblasting device according to any one of claims 1-4, characterized in that: It also includes a limiting ring, which is fixedly connected to the outer periphery of the rotating disk and extends downward to form a cylindrical structure surrounding the outer periphery of the supporting disk.

6. A valve sandblasting device according to claim 5, characterized in that: A radial gap is reserved between the inner wall of the limiting ring and the outer edge of the supporting disk.

7. A valve sandblasting device according to claim 6, characterized in that: The rotating disk, the supporting disk, and the limiting ring together form an inner cavity, and the inner cavity also includes an air supply assembly connected to the inner cavity.

8. A valve sandblasting device according to any one of claims 1-4, characterized in that: The support disc is connected to the inner wall of the box by several support rods.

Images