Rubber point supporting type special-shaped concrete precise instrument vibration isolation platform

Abstract

The utility model discloses a rubber point supporting type special-shaped concrete precise instrument vibration isolation platform which comprises a rectangular concrete platform, a steel bar truss floor support plate, channel steel and a rubber block, wherein the rectangular concrete platform is located on the upper portion and determined according to the instrument production requirement in the precise electronic industry, the steel bar truss floor support plate guarantees deformation control in the construction process, and the channel steel disperses loads. The compression amount of a single rubber block is changed by changing the number of the rubber blocks and adopting the mass of the scrap iron mixed concrete, so that the target design frequency of the vibration isolation machine table is changed, and vibration isolation of main frequency components of target environment vibration is achieved. Compared with the prior art, the system has the advantages of low manufacturing cost, simple system, low maintenance cost and high adaptability.

Description

Technical Field

[0001] This utility model relates to the field of environmental micro-vibration control technology, specifically a rubber point-supported irregular concrete precision instrument vibration isolation platform. Background Technology

[0002] With the vigorous development of China's high-tech industries and the steady implementation of various large-scale national scientific projects, minor environmental vibrations are becoming increasingly prominent in production experiments and have become a problem that cannot be ignored. There are generally three approaches to solving environmental micro-vibration problems: active vibration isolation at the source, structural design along the path, and passive vibration isolation at precision instruments. In practical engineering, it is often necessary to consider all three vibration suppression schemes comprehensively. Installing passive vibration isolation devices at precision instruments is a common approach. While air-floating platforms are the most commonly used, they have inherent drawbacks: fixed shape, high cost, complex system, and high maintenance costs. Steel spring vibration isolators are also a common solution, but the damping of steel springs is relatively low, requiring the configuration of corresponding viscous dampers, which makes the vibration isolation platform more complex and may also lead to leakage of viscous damping fluid causing pollution. To improve the adaptability of vibration isolation devices, a rubber-point-supported irregular-shaped concrete precision instrument vibration isolation platform is proposed, which features customizable shape, low cost, strong adaptability, and high durability. Utility Model Content

[0003] Therefore, in order to solve the above problems, the purpose of this utility model is to provide a rubber point-supported irregular concrete precision instrument vibration isolation platform to solve the problems of high cost, complex system, high maintenance cost and poor adaptability of the existing vibration isolation platform solutions mentioned in the background art.

[0004] The technical solution of this utility model is as follows: A rubber-supported, irregularly shaped concrete vibration isolation platform for precision instruments is constructed. Its features include a rectangular concrete platform customized according to the shape of the upper precision instrument, a steel truss floor slab for deformation control, uniformly distributed load-distributing channel steel at the bottom, and rubber blocks providing vibration isolation. Its shape, from top to bottom, includes a rectangular concrete platform, a steel truss floor slab, channel steel, rubber blocks, and a ground with recesses. The load-distributing channel steel is fixed below the rectangular concrete platform. The rubber blocks are placed between the corresponding load-distributing channel steel and the ground, with a minimum of four blocks. The recesses in the ground are used to constrain the position of the rubber blocks. The rectangular concrete platform provides greater stiffness and mass, ensuring a lower natural frequency for the vibration isolation system. The steel truss floor slab distributes the load and controls construction deformation. The channel steel, acting as a beam, concentrates the surface load of the steel truss floor slab onto the rubber blocks below. The rubber blocks, as flexible components, provide lower stiffness, resulting in a lower natural frequency for the vibration isolation system. The recesses in the ground constrain the position of the rubber blocks, ensuring ease of construction and installation, and platform operational stability.

[0005] Furthermore, the planar dimensions of the rectangular concrete platform are customized based on the external shape of the precision instrument. The specific dimensions of the rectangular concrete platform are determined according to the shape requirements of the precision instrument.

[0006] Furthermore; the mass of the rectangular concrete platform meets the following requirements. M ≥8 MT ,in M For the mass of the rectangular concrete platform, MT The total mass of the superstructure supported by the rectangular concrete platform; scrap concrete is used when conventional concrete is not up to standard.

[0007] Furthermore, to ensure the stability of the rubber block, the rubber block is designed to be short and stout, meaning that its height is less than its length and width.

[0008] Furthermore, to ensure that the rubber block has ideal vibration isolation and damping characteristics and stability, butyl rubber material is used; to ensure the anti-slip properties of the rubber block and the convenience of construction and installation, the contact surfaces between the rubber block and the ground and the channel steel are designed with anti-slip texture; at the same time, the opening width of the channel steel is designed to be 2mm larger than the width of the rubber block.

[0009] Furthermore, the compression of the rubber block during operation should be controlled within 30mm. If the compression exceeds the limit, the number of rubber blocks should be increased to adjust the compression.

[0010] Furthermore, the rubber blocks are distributed in an equally spaced matrix to ensure that the stress distribution uniformity error of each rubber block under vibration damping conditions does not exceed ±5%, the maximum stress difference is controlled within 10% of the average value, and the Von Mises stress fluctuation range should be controlled within ±7%.

[0011] Furthermore, the total center of gravity height of the rectangular concrete platform and the precision instruments on top is controlled to be within 2 / 3 of the height of the rectangular concrete platform.

[0012] Furthermore, the height of the rubber block is controlled within 150mm, and the compression during operation is controlled within 30mm. When the compression of the rubber block does not meet the above requirements, the number of rubber blocks can be increased to reduce the compression.

[0013] This utility model has the following advantages: it uses inexpensive and stable concrete and rubber blocks, ensuring low cost, stable performance, strong adaptability, high durability and low maintenance; by rationally designing the number of rubber blocks and the equally spaced matrix layout, the design of the target frequency vibration isolation platform can be realized; the rectangular concrete platform has low manufacturing cost and mature and stable technology, and has strong adaptability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a partial view of the rubber block installation in this utility model;

[0016] Figure 3 This is an external view of the rubber block in this utility model;

[0017] Figure 4 This is a schematic diagram of the dynamic model of this utility model;

[0018] Figure 5 This is a schematic diagram of the vibration isolation curve of this utility model;

[0019] Figure 6 This is a schematic diagram of a typical application case of this utility model.

[0020] Among them: 1. Rectangular concrete platform, 2. Steel truss floor deck, 3. Channel steel, 4. Rubber block, 401. Anti-slip textured structure, 5. Ground with pits, 6. Natural frequency of rectangular concrete vibration isolation platform, 7. Starting frequency of vibration isolation of rectangular concrete vibration isolation platform, 8. Vibration isolation curve of rectangular concrete vibration isolation platform, and 9. Precision instrument to be isolated. Detailed Implementation

[0021] The following will be combined with the appendix Figures 1-6 This utility model will be described in detail, and the technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0022] This invention provides a rubber-point-supported irregular concrete precision instrument vibration isolation platform to solve the problems of high cost, complex system, high maintenance cost, and poor adaptability of existing vibration isolation platform solutions mentioned in the background art.

[0023] Includes: a rectangular concrete platform 1, which should be custom-designed according to the requirements of the precision instruments on the upper part.

[0024] Rubber block 4, wherein the rubber blocks are placed between the rectangular concrete platform and the ground, and the number is not less than 4.

[0025] Preferably, the total center of gravity height of the rectangular concrete platform and the upper precision instrument is controlled within 2 / 3 of the height of the rectangular concrete platform.

[0026] Preferably, the mass of the rectangular concrete platform is greater than 8 times the total mass of the upper precision instrument. When conventional concrete cannot meet this quality index in actual engineering, concrete mixed with iron filings is used.

[0027] Preferably, in order to ensure the construction quality of the rectangular concrete platform and reduce the deformation of the rectangular concrete platform during construction, a steel truss floor slab is used.

[0028] Preferably, to ensure the stability of the rubber block, the rubber block has a short and stout shape, that is, its height is smaller than its length and width.

[0029] Preferably, butyl rubber material is used to ensure that the rubber block has ideal vibration isolation and damping characteristics and stability.

[0030] Preferably, the height of the rubber block is controlled within 150mm, and the compression during operation is controlled within 30mm. When the compression of the rubber block does not meet the above requirements, the number of rubber blocks can be increased to reduce the compression.

[0031] Preferably, the rubber blocks are evenly distributed, and each rubber block is subjected to basically the same force during operation, with the maximum difference controlled within 5%.

[0032] See Figure 1 This utility model provides a rubber-supported, irregularly shaped concrete vibration isolation platform for precision instruments. This embodiment uses a rectangular concrete platform as an example. 1 and 2 are steel truss floor slabs used to ensure the construction quality of the rectangular concrete platform and reduce deformation during construction. 3 is a channel steel for load distribution. 4 are uniformly distributed rubber blocks, ensuring that the load on each rubber block is basically consistent, i.e., the force deviation of each block is ≤5%. To ensure the stability of the rubber blocks, the rubber blocks have a short and stout shape, i.e., the height is less than its length and width. To ensure the rubber blocks have ideal vibration isolation and damping characteristics and stability, butyl rubber material is preferred. The height of the rubber blocks is controlled within 150mm, and the compression during operation is controlled within 30mm. When the compression of the rubber blocks does not meet the above requirements, the number of rubber blocks can be increased to reduce the compression, or concrete mixed with iron filings can be used to increase the compression.

[0033] See Figure 2 The diagram shows a partial view of the installation of the rubber block in this utility model. The opening width of the channel steel is within 2mm wider than the width of the rubber block to ensure that the rubber block does not move laterally within the channel steel, which facilitates the construction and installation of this utility model.

[0034] See Figure 3The schematic diagram of the rubber block in this utility model shows that the top surface that contacts the channel steel and the bottom surface that contacts the ground are both designed with anti-slip texture to ensure that the rubber block does not slide horizontally during normal operation.

[0035] See Figure 4 The schematic diagram of the dynamic model of this utility model shows the equivalent mass of the rectangular concrete platform and the precision instrument, c1 is the equivalent viscous damping of the rubber block at the working compression position, and k1 is the equivalent stiffness of the rubber block at the working compression position. The vibration isolation principle of this utility model is to attenuate the vibration of the ground (x0) to obtain the vibration of the top surface of the vibration isolation platform (x1).

[0036] See Figure 5 The typical vibration isolation curve 8 of this utility model, namely Figure 2 The transfer function curve from ground vibration (x0) to vibration (x1) on the top surface of the vibration isolation platform. Here, 6 is the resonant frequency of the vibration isolation platform, and 7 is the frequency at which the platform begins operation, which is 1.414 times the resonant frequency. In actual vibration isolation platform design, this frequency 7 must be less than the dominant frequency of ground vibration.

[0037] See Figure 6 In a typical application of this utility model, the upper precision instrument 9 has vibration level requirements, and vibration isolation is achieved through this platform.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art; the general principles defined herein may be implemented in other embodiments without departing from the core spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown in this specification, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rubber-point-supported irregularly shaped concrete vibration isolation platform for precision instruments, characterized in that, It includes a rectangular concrete platform (1), a steel truss floor slab (2), a load-distributing channel steel (3), and a rubber block (4) for vibration isolation; its shape from top to bottom includes a rectangular concrete platform (1), a steel truss floor slab (2), a channel steel (3), a rubber block (4), and a ground with a pit (5); the load-distributing channel steel (3) is fixed below the rectangular concrete platform (1), and the rubber block (4) is placed between the load-distributing channel steel (3) corresponding to the rectangular concrete platform (1) and the ground (5), with a number of not less than 4, and the pit on the ground is used to constrain the position of the rubber block (4).

2. The rubber-supported irregular concrete precision instrument vibration isolation platform according to claim 1, characterized in that, The rectangular concrete platform (1) is determined based on the shape requirements of the precision instrument.

3. The rubber-supported irregular concrete precision instrument vibration isolation platform according to claim 1, characterized in that, To ensure the stability of the rubber block (4), the rubber block (4) has a short and stout appearance, that is, its height is less than its length and width.

4. The rubber-supported irregular concrete precision instrument vibration isolation platform according to claim 1, characterized in that, The rubber block (4) is made of butyl rubber material; the contact surfaces of the rubber block (4) with the ground (5) and the channel steel (3) are designed with anti-slip texture (401); at the same time, the opening width of the channel steel (3) is designed to be 2mm larger than the width of the rubber block (4).

5. The rubber-supported irregular concrete precision instrument vibration isolation platform according to claim 1, characterized in that, The compression of the rubber block (4) during operation should be controlled within 30mm. If the compression exceeds the standard, the number of rubber blocks (4) can be increased to make an adjustment.

6. The rubber-supported irregular concrete precision instrument vibration isolation platform according to claim 1, characterized in that, The rubber blocks (4) are distributed in an equally spaced matrix.

7. The rubber-supported irregular concrete precision instrument vibration isolation platform according to claim 1, characterized in that, The total center of gravity height of the rectangular concrete platform (1) and the upper precision instrument (9) is controlled within 2 / 3 of the height of the rectangular concrete platform.

8. The rubber-supported irregular concrete precision instrument vibration isolation platform according to claim 1, characterized in that, The height of the rubber block (4) is controlled within 150mm.

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