High-efficiency comprehensive screening device reduces isolation foundation structure

Abstract

The utility model discloses a kind of high-efficiency comprehensive screening device reduction vibration isolation foundation structure, and the equipment and foundation are effectively connected by table body fixing seat and guide rail, so that the high-frequency sustained vibration generated by equipment can be effectively consumed and reduced by this reduction vibration isolation foundation;At the same time, the common action of reinforced concrete foundation (10, 11) and vibration isolation board makes the vibration reduce to the level that does not affect normal production;The reduction vibration isolation foundation itself is poured by solid brick mold, and waterproofing membrane is arranged around, concrete cushion is arranged at the bottom, and impermeable cloth is arranged between the reduction vibration isolation foundation and the vibration isolation bottom layer. The comprehensive screening device inevitably produces high-frequency sustained vibration in three-axis direction during normal use, in order to meet the normal production demand, while avoiding the situation that the equipment mechanical components fatigue wear, bearing gear premature failure and other factors affect the normal operation of the equipment caused by excessive vibration, the setting of the reduction vibration equipment foundation is particularly important.

Description

Technical Field

[0001] This utility model relates to vibration reduction and isolation for vibratory screening devices, specifically to a vibration reduction and isolation foundation structure used in conjunction with the vibratory screening device. It tightly connects the screening device to the vibration reduction and isolation foundation via a platform fixing seat and guide rails. Utilizing the characteristic that the frequency response function is primarily related to structural quality in the high-frequency range, this foundation enables the screening device to reduce and isolate vibrations, improve equipment operational stability, enhance user experience, and adapt to different geological conditions during operation. Background Technology

[0002] Currently, the various losses caused by equipment vibration remain significant for manufacturing enterprises in my country. For example, excessive vibration can accelerate fatigue wear of mechanical parts, cause premature failure of critical components such as bearings and gears, and even lead to equipment breakage or deformation. This not only affects the normal operation of the equipment but also greatly increases the cost of maintenance and replacement of parts. In addition, excessive industrial noise generated by high-frequency vibration can affect the working environment and the health of employees. Long-term exposure to noise may cause health problems such as hearing loss and nervous system disorders in employees. If enterprises fail to effectively control noise pollution, they may also face penalties from environmental protection departments. Furthermore, when vibrating equipment is in direct contact with buildings, the low-frequency components in the vibration source may even cause local resonance in the main structure of the building, resulting in irreversible damage to the factory or workshop.

[0003] In conclusion, the damage caused by equipment vibration to enterprises is multifaceted, and vibration reduction and isolation foundations have a significant impact on whether manufacturing industries can carry out normal production activities. Utility Model Content

[0004] Therefore, to address the aforementioned shortcomings, this utility model provides a vibration-damping foundation structure for a high-efficiency integrated screening device; it can effectively reduce the high-frequency vibrations generated during the use of the high-efficiency integrated screening device, ensuring the normal operation of production activities. Simultaneously, it balances economic efficiency and the effectiveness of vibration reduction and isolation, truly achieving an economical, reasonable, and scientific approach.

[0005] This utility model is implemented as follows: a high-efficiency integrated screening device vibration reduction and isolation foundation structure is constructed, characterized by: a reinforced concrete vibration reduction foundation (1), a platform fixing seat (2), and a guide rail (3); the equipment (screening device) is effectively connected to the foundation through the platform fixing seat (2) and the guide rail (3), so that the high-frequency continuous vibration generated by the equipment can be effectively consumed and reduced through this vibration reduction and isolation foundation; at the same time, the reinforced concrete foundation (10, 11) and the vibration isolation plate (4) work together to reduce the vibration to a level that does not affect normal production; the vibration reduction foundation (1) itself is cast using a solid brick mold (5), and waterproof membrane (6) is set around the perimeter, and a concrete pad layer (8) is set at the bottom. A seepage-proof cloth (7) is set between the vibration reduction foundation (1) and the vibration isolation bottom layer (9), thereby preventing concrete from entering the vibration isolation layer and causing the vibration isolation layer to solidify, which would affect the vibration reduction and isolation effect.

[0006] This utility model has the following advantages: It provides a vibration-damping foundation method for a high-efficiency integrated screening device. During normal use, the integrated screening device inevitably generates high-frequency continuous vibrations in three axes. To meet normal production needs and prevent excessive vibration from causing fatigue wear of mechanical components, premature failure of bearings and gears, and other disruptions to normal equipment operation, the construction of a vibration-damping foundation is crucial. It also plays an important role in protecting the equipment, improving operational stability, enhancing user experience, and adapting to different geological conditions. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the vibration reduction and isolation foundation of a high-efficiency integrated screening device according to this utility model;

[0008] Figure 2 This is a schematic cross-sectional view of the vibration isolation foundation.

[0009] Figure 3 This is a schematic diagram of the reinforcement design for a vibration isolation foundation.

[0010] Figure 4 This diagram illustrates the effect of different parameters on the frequency response function.

[0011] Among them: 1. Reinforced concrete vibration damping foundation, 2. Platform fixing seat, 3. Guide rail, 4. Vibration isolation plate, 5. Solid brick mold, 6. Waterproof membrane, 7. Seepage-proof cloth, 8. Concrete cushion layer, 9. Vibration isolation bottom layer, 10. and 11. Reinforced concrete foundation. Detailed Implementation

[0012] The following will be combined with the appendix Figures 1-4This 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.

[0013] This utility model provides a high-efficiency integrated screening device vibration reduction and isolation foundation structure, such as... Figures 1-3 As shown, it can be implemented in the following manner: including a reinforced concrete vibration damping foundation 1, a platform fixing seat 2, and a guide rail 3; the platform fixing seat 2 and the guide rail 3 effectively connect the equipment to the foundation, so that the high-frequency continuous vibration generated by the equipment can be effectively consumed and reduced by this vibration damping foundation; at the same time, the reinforced concrete foundations 10 and 11 and the vibration isolation plate 4 work together to reduce the vibration to a level that does not affect normal production; the vibration damping foundation 1 itself is cast using a solid brick mold 5, and waterproof membrane 6 is installed around the perimeter, and a concrete pad layer 8 is installed at the bottom. A waterproof cloth 7 is installed between the vibration damping foundation 1 and the vibration isolation bottom layer 9 to prevent concrete from entering the vibration isolation layer and causing the vibration isolation layer to solidify, thus affecting the vibration damping effect.

[0014] In the diagram, 10 and 11 are both reinforced concrete foundations, which are two layers of reinforced concrete foundations separated by a vibration isolation layer.

[0015] The principle behind this application is as follows:

[0016] 1. Design of reinforced concrete foundation dimensions

[0017] According to the mathematical model of a general dynamic system in the frequency domain: X(ω)=F(ω)H(ω), it can be seen that changing the system's input excitation F(ω) or frequency response function H(ω) can control the structural output response X(ω). When X(ω) is less than the allowable response severity X′(ω) of the equipment, the vibration can be considered to meet the normal use of the equipment. In the high-frequency range, the frequency response function is mainly related to the structural quality (see note for details). At the same time, due to the indoor environment where the screening device is located, the planar projected area of ​​the vibration reduction and isolation foundation cannot be increased indefinitely. Therefore, the thickness of the foundation can be used as a control index to ensure the vibration reduction and isolation effect.

[0018] Note:

[0019] According to the vibration equation of a multi-degree-of-freedom system:

[0020]

[0021] Where [M] is the system mass matrix; [C] is the system damping matrix; and [K] is the system stiffness matrix. This represents the acceleration vector of the corresponding node; {x} is the velocity vector of the corresponding node; {f(t)} is the displacement vector of the corresponding node; and {F(t)} is the external load vector. Performing a Fourier transform on both sides of equation (1) simultaneously yields -ω in the viscous damped system. 2 mX(ω)+jωcX(ω)+kX(ω)=F(ω)...(2),

[0022] Combining X(ω)=F(ω)H(ω), we can obtain

[0023]

[0024] Introducing a structural damping model related to internal friction of the material, the differential equation of the vibration system is:

[0025]

[0026]

[0027] The magnitude of the damping force is proportional to the displacement, and the complex stiffness is defined by R = -jgx = -jgηx.

[0028] k+jg=(1+jη)k...(6)

[0029] Where g is the structural damping coefficient and η is the structural damping ratio, taking a Fourier transform on both sides of equation (5) yields:

[0030] (-ω 2 m+jηk+k)·X(ω)=F(ω)...(7)

[0031] Solving for the frequency response function H(ω), we have:

[0032]

[0033] In the above formula, let the frequency ratio Ω = ω / ω0, where Given the structure's natural frequency, we can obtain mω. 2 =kΩ 2 Substituting into equation (8), we get:

[0034]

[0035] By separating the real and imaginary parts in equation (9), we can obtain:

[0036]

[0037] Therefore, the amplitude of the frequency response function can be obtained as follows:

[0038]

[0039] When the excitation frequency ω is close to 0, Ω is also close to 0.

[0040]

[0041] Therefore, the frequency response function in the low-frequency range is mainly related to the structural stiffness; and when ω = ω0, the value of Ω is 1.

[0042]

[0043] At this point, damping begins to affect the amplitude of the frequency response function; and when ω > ω0, Ω 2 If >1, then:

[0044]

[0045] Therefore, from:

[0046]

[0047] We know that y = -1 / (ω) 2 m) is an asymptote of the frequency response function, therefore the frequency response function in the high-frequency range is mainly related to the structural quality.

[0048] Based on the above, the effects of stiffness, damping, and mass on the frequency response function are illustrated. Figure 4 .

[0049] 2. Connection Design:

[0050] An effective connection is required between the vibratory screening device and the vibration damping foundation to ensure that vibrations generated during production are effectively dissipated and reduced through the foundation. Anchor bolts are used to pre-embed a platform fixing seat on top of the vibration damping foundation to ensure a secure connection between the equipment and the foundation. Simultaneously, the embedded parts need to be pre-embedded according to the size and location of the vibratory equipment, determining the material, size, shape, and spacing of the embedded parts. These embedded parts are generally made of steel and are effectively connected to the reinforcing steel within the structure to improve their strength and ensure the service life of the vibration damping foundation. Furthermore, guide rails are installed on the fixing seat to facilitate equipment placement and use.

[0051] 3. Construction Design:

[0052] When pouring and shaping large-mass concrete, it is necessary to consider how to prevent concrete from entering the vibration isolation layer, solidifying the layer, and affecting its vibration reduction and isolation effect. Therefore, an outermost layer of C30 reinforced concrete foundation is set inside the brick formwork, and a self-adhesive waterproof membrane is laid between the brick formwork and the concrete foundation as a waterproofing measure. After the first part of the foundation is formed, vibration isolation plates are laid around the foundation pit, followed by a vibration isolation base layer, and then a waterproof fabric is laid on top of the base layer to prevent concrete from entering the vibration isolation layer. After all the laying is completed, the second part of the reinforced concrete foundation is poured.

[0053] The specific implementation is as follows:

[0054] Structural design

[0055] Vibration-damping foundation dimensions: When the indoor space where the screening device is located is limited, the planar projection size of the foundation cannot be increased indefinitely. It is necessary to adjust the overall mass of the foundation by adjusting the foundation depth, so as to make the output response X(ω) less than the allowable response severity X′(ω) of the equipment. At the same time, it is necessary to coordinate and comprehensively assess the space of the main structure and possible structural components (main structure foundation, beams, columns, etc.) on site in advance to make room for the vibration-damping foundation.

[0056] Waterproofing measures: A layer of TPO self-adhesive membrane moisture-proof layer is used as a waterproofing measure between the 120mm thick solid brick formwork and the reinforced concrete vibration-damping foundation pit.

[0057] Basic procedure: Place a vibration-damping base layer (pebbles recommended) in the initial pouring pit, then lay a waterproof fabric to prevent concrete from entering the vibration-damping layer and allow it to solidify. Install vibration-damping boards (XPS-50 extruded polystyrene board recommended) around the pit, followed by the placement of box-type reinforcing steel bars (…). Grade II steel (spaced 200*200*200mm) is used, with a 165mm gap at the top for secondary pouring after the platform mounting base is installed. Two 200mm wide and 90mm deep grooves are also reserved for later guide rail installation. Finally, concrete is poured to complete the vibration damping foundation construction.

[0058] Foundation bearing layer: The bearing layer of the vibration reduction and isolation foundation must meet the foundation bearing capacity requirements, and the uneven settlement caused by different bearing layers must be considered. If necessary, local foundation treatment is required.

[0059] By implementing the above key practices and points, the vibration reduction and isolation foundation can play an important role in protecting equipment, improving equipment operational stability, enhancing user experience, and adapting to different geological conditions.

[0060] 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, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vibration-damping foundation structure for a high-efficiency integrated screening device, characterized in that: It includes a reinforced concrete vibration damping foundation (1), a platform fixing seat (2), and a guide rail (3); the platform fixing seat (2) and the guide rail (3) effectively connect the equipment to the foundation, so that the high-frequency continuous vibration generated by the equipment can be effectively consumed and reduced by this vibration damping foundation; at the same time, the reinforced concrete foundation (10, 11) and the vibration isolation plate (4) work together to reduce the vibration to a level that does not affect normal production; the vibration damping foundation (1) itself is cast using a solid brick mold (5), and waterproof membrane (6) is set around the perimeter, and a concrete pad layer (8) is set at the bottom. A seepage-proof cloth (7) is set between the vibration damping foundation (1) and the vibration isolation bottom layer (9), thereby preventing concrete from entering the vibration isolation layer and causing the vibration isolation layer to solidify.

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