A vibration isolation type vibration and shock double control support hanger device based on interference fit energy consumption

Abstract

The application discloses a kind of based on interference fit energy consumption vibration type vibration dual-control support hanger device, including support hanger assembly, still including vibration dual-control component, the vibration dual-control component is assembled on support hanger assembly;The vibration dual-control component includes shell, top pressure bearing, energy dissipation damping element and elastic element;The energy dissipation damping element is fixedly attached inside shell and is fixed with shell;The elastic element is placed in the space inside top pressure bearing and energy dissipation damping element surrounded and is interference fit with energy dissipation damping element, and the elastic element is consolidated with top pressure bearing;The spring drives top pressure bearing and energy dissipation damping element relative movement to occur friction energy dissipation.This scheme existing assembly type finished product support hanger seismic mode, change to interference friction energy dissipation and spring vibration isolation / vibration combination form, while reducing installation space, can also greatly improve support hanger resistance vibration action ability.

Description

Technical Field

[0001] This invention relates to the field of civil engineering technology, specifically to a vibration isolation type dual-control support and hanger device based on interference fit energy dissipation. Background Technology

[0002] Installation engineering output value accounts for approximately 20% of the total construction engineering output value, with supports and hangers making up about 2% of the installation output value. They are indispensable key components in the building installation industry. As load-bearing and limiting components of the main non-structural suspension systems in the building installation industry, supports and hangers play an extremely important role in the safe operation of building facilities. Supports and hangers are mainly used in electromechanical engineering facilities such as building water supply and drainage, fire protection, heating, ventilation, air conditioning, gas, heat, electricity, and communications.

[0003] Currently, over 90% of the building installation market share still uses traditional welded supports and hangers. Traditional installation processes require multiple steps, including on-site cutting, bending, drilling, welding, and painting. This results in low standardization, and the connection performance is heavily influenced by the on-site construction skills, making quality control difficult. Furthermore, when secondary modifications are involved, cutting is required, preventing the components from being reused.

[0004] Therefore, in view of the technical problems existing in the above-mentioned welded supports and hangers, the prior art provides a prefabricated finished support and hanger, whose vertical connecting components are mostly assembled using threaded rods or C-shaped channel steel. The support is relatively light, does not require lifting equipment, is easy to install, and has a lower overall cost.

[0005] However, when this prefabricated support bracket is used for earthquake resistance, it is usually in the form of diagonal bracing. The addition of diagonal bracing significantly increases the installation space and affects the pipeline layout.

[0006] Therefore, how to significantly improve the resistance of supports to seismic / vibration effects while reducing installation space is a problem that needs to be solved in this field. Summary of the Invention

[0007] To address the technical problems of existing prefabricated seismic bracing systems, such as large installation space and low resistance to seismic / vibration effects, this solution aims to provide a vibration-isolation dual-control seismic bracing device based on interference fit energy dissipation. This device can significantly improve the seismic / vibration resistance of the bracing system while reducing installation space, effectively overcoming the problems existing in the prior art.

[0008] To achieve the above objectives, the present invention provides a vibration isolation type dual-control support and hanger device based on interference fit energy dissipation, comprising a support and hanger assembly and a dual-control vibration assembly, wherein the dual-control vibration assembly is assembled on the support and hanger assembly; the dual-control vibration assembly comprises a shell, a top pressure bearing support, an energy dissipation damping element, and an elastic element; the energy dissipation damping element is fitted inside the shell and fixed thereto; the elastic element is placed inside the space surrounded by the top pressure bearing support and the energy dissipation damping element and is interference-fitted with the energy dissipation damping element, and the elastic element is fixed to the top pressure bearing support; the spring drives the top pressure bearing support and the energy dissipation damping element to move relative to each other, generating friction to dissipate energy.

[0009] Furthermore, the lateral pressure of the interference fit between the sidewall of the top pressure bearing support and the energy dissipation damping element is within 1 to 2 kN.

[0010] Furthermore, the support and hanger assembly includes several hangers and a crossbeam; the several hangers are vertically arranged on the crossbeam and connected to the crossbeam to form a support and hanger structure.

[0011] Furthermore, the allowable tensile force of the boom satisfies the following formula:

[0012] N s =A s [σ]×f1

[0013] In the formula: Ns is the allowable value of the tension of the rod; As is the cross-sectional area of ​​the root of the threaded rod; [σ] is the allowable stress; and f1 is the adjustment coefficient.

[0014] Furthermore, the allowable stress reduction factor is 0.6 to 0.8.

[0015] Furthermore, the cross-sectional area As at the root of the threaded rod satisfies the following formula:

[0016]

[0017] d a =d-1.2655P-|e s |-Td2

[0018] In the formula: d is the nominal diameter of the threaded rod; P is the pitch; es is the upper deviation of the threaded rod diameter; Td2 is the tolerance of the threaded rod pitch diameter; f2 is the root section adjustment coefficient.

[0019] Furthermore, the value of f2 is 0.95.

[0020] Furthermore, the load frequency of the support and hanger satisfies the following formula:

[0021]

[0022] In the formula: K is the vertical stiffness of the load support; M is the load weight.

[0023] The present invention provides a vibration isolation type dual-control support and hanger device based on interference fit energy dissipation, which changes the existing seismic resistance mode of prefabricated support and hanger to a combination of interference friction energy dissipation and spring vibration isolation / vibration. While reducing the installation space, it can also significantly improve the support and hanger's ability to resist seismic / vibration. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] Figure 1 This is a structural schematic diagram of a vibration isolation type dual-control support and hanger device based on interference fit energy dissipation.

[0026] Figure 2 This is a structural side view of the vibration isolation type dual-control support and hanger device based on interference fit energy dissipation;

[0027] Figure 3 This is a schematic diagram of the vibration dual-control component in the vibration isolation type vibration dual-control support and hanger device based on interference fit energy dissipation;

[0028] Figure 4 The curves show the relationship between vibration isolation effect and frequency ratio and damping ratio.

[0029] The following are the component labels in the attached diagram:

[0030] 100. Support and hanger assembly; 200. Vibration control assembly; 110. Hanger rod; 120. Crossbeam; 210. Housing; 220. Top pressure bearing support; 230. Energy dissipation damping element; 240. Elastic element; 250. Set screw. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0032] To address the technical problems of existing prefabricated support and hanger systems having large installation space requirements and low resistance to seismic / vibration effects, this solution provides a vibration-isolation dual-control support and hanger device based on interference fit energy dissipation. This device changes the seismic resistance mode of existing prefabricated support and hanger systems to a combination of interference friction energy dissipation and spring vibration isolation, thereby reducing installation space and significantly improving the support and hanger system's resistance to seismic / vibration effects.

[0033] The vibration isolation type dual-control support and hanger device based on interference fit energy dissipation provided in this solution is connected to the top of the building structure and is used to support non-structural components such as electromechanical pipelines. Through the dual-control device, the vibration damage of the non-structural components it supports is reduced, and the support and hanger is prevented from being damaged or falling.

[0034] See Figures 1-2 The vibration isolation type dual-control support and hanger device based on interference fit energy dissipation includes a support and hanger assembly 100 and a dual-control vibration assembly 200, wherein the support and hanger assembly 100 is assembled on the dual-control vibration assembly 200.

[0035] The support and hanger assembly 100 includes several hangers 110 and crossbeams 120.

[0036] The crossbeam 120 is set horizontally relative to the ground, and several hangers 110 are set vertically on the crossbeam 120 and connected to the crossbeam 120 to form a support structure.

[0037] The connection structure between the hanger 110 and the crossarm 120 is not limited in this scheme. The preferred method is bolting, which allows for detachable connection between the hanger 110 and the crossarm 120, facilitating the assembly of the support structure and the replacement of components.

[0038] In this invention, since the support and hanger is a prefabricated support and hanger, the hanger 110 adopts a threaded hanger, which can be detachably connected to the crossbeam 120 and the vibration dual control component 200 by screwing or bolting, thus forming a prefabricated structure.

[0039] Therefore, the allowable tensile force of the threaded hanger 110 is an important basis for selecting and designing threaded hangers, so as to ensure that the threaded hanger 110 has sufficient load-bearing capacity.

[0040] Furthermore, referring to the standard GB / T 17116-2018 "Pipe Supports and Hangers" and the drawing set GJBT-630-2017 "Indoor Pipe Supports and Hangers", the allowable tensile force value does not clearly specify the corresponding usage conditions, which also affects the accurate design and selection of threaded hanger 110.

[0041] Although GB / T 17116-2018 "Pipe Supports and Hangers" provides the value of the cross-sectional area at the root of the thread, it does not consider the influence of the 110 precision grade of the threaded hanger and does not provide the corresponding usage conditions. This is not conducive to the practical application of the cross-sectional area at the root of the threaded hanger and can easily lead to misuse of the cross-sectional area at the root of the threaded hanger, affecting the accuracy of the calculation results of the allowable tensile force of the threaded hanger.

[0042] Therefore, existing technologies cannot accurately calculate the allowable tensile force of threaded hangers, which can easily lead to structural reliability issues in the overall support and hanger system.

[0043] To address the problems existing in the prior art, this solution provides a formula to improve the reliability of the structure, wherein the allowable tensile force of the hanger 110 can satisfy the following formula:

[0044] N s =A s [σ]×f1 (1)

[0045] In the formula: Ns is the allowable value of the tension of the rod; As is the cross-sectional area of ​​the root of the threaded rod; [σ] is the allowable stress. According to the requirements of the National Power Planning and Design Association and with reference to the "Technical Regulations for Design of Steam and Water Pipelines in Thermal Power Plants" DL / T 5054-1996, the allowable stress value of Q235B steel at 20℃ is taken as 111.6MPa.

[0046] f1 is the allowable stress reduction factor. In the MSS SP-58-2002 standard, it is recommended that the allowable stress reduction factor for threaded hanger 110 be 0.6 to 0.8, with 0.75 being preferred, which can ensure that the threaded hanger is within the optimal stress range.

[0047] This paper compares the allowable value of the boom tension recommended in GB / T 17116-1997 with the value of the inversion fitting reduction range of 0.45 to 0.65, with 0.544 being preferred, and the relative error is less than 3%.

[0048] Furthermore:

[0049]

[0050] Referring to MSS SP-58-2002 and ASME B1.13 standards, the root area of ​​the thread satisfies the following formula:

[0051] d a =d-1.2655P-|e s |-Td2 (3)

[0052] In the formula: d is the nominal diameter of the threaded hanger, mm; P is the pitch, mm; es is the upper deviation of the threaded hanger diameter, mm; Td2 is the tolerance of the threaded hanger pitch diameter, mm.

[0053] The relevant reference standards are GB / T 192-2003 "Basic Tooth Profile of Ordinary Thread", GB / T197-2018 "Tolerances of Ordinary Thread", and GB / T 2516-2003 "Limit Deviations of Ordinary Thread".

[0054] Because the calculation methods for the root section of MSS SP-58-2002 and ASME B1.13 standards differ from those of GB / T 17116-2018 "Pipeline Supports and Hangers", a root section adjustment factor f2 is introduced. This factor is only used to compensate for the calculation deviation of the hanger section between different calculation methods. Compared with the calculation results of the threaded rod section in "Study on the Calculation of Maximum Service Load of Threaded Hangers for Pipelines in Thermal Power Plants", the root section adjustment factor is taken as 0.95.

[0055] The allowable stress of threaded rods with different diameters can be calculated using the above calculation method. The following is a table showing the calculation of the allowable tensile force of threaded rods for supports and hangers with different diameters, specifically for rod 110:

[0056]

[0057] Since existing standards and atlases do not provide detailed calculation methods for the allowable value of the tie rod tension, which involve numerous experimental fitting results and reduction coefficients, this paper proposes a design method that is close to and more conservative than existing standards, based on existing literature. As shown in the table above, the average deviation rate is 1.57%, which can ensure design safety.

[0058] The vibration control component 200 is correspondingly installed at the top of the boom 110. The boom 110 is divided into two sections at the vibration control component 200. The upper section is connected to the top pressure support 220 by bolts, and the lower section is connected to the outer shell 210 by bolts.

[0059] See Figure 3 The vibration control assembly 200 includes a housing 210, a top pressure support 220, an energy-dissipating damping element 230, and an elastic element 240.

[0060] The energy-dissipating damping element 230 is fitted inside the housing 210 and fixed to the housing 210 by the set screw 250 and the fixing adhesive.

[0061] The energy-dissipating damping element is approximately 4–6 mm thick, preferably made of a 5 mm thick flexible rubber friction material, which allows for a certain amount of compression space for interference fit.

[0062] The flexible friction material here is not limited to rubber; it can be determined according to the specific application.

[0063] The elastic element 240 is placed in the space surrounded by the top bearing support and the energy dissipation damping element 230. At the same time, the top bearing support 220 is fixedly connected to the top of the elastic element 240 and is also interference-fitted with the energy dissipation damping element 230. During the movement, under the drive of the elastic component, the friction between the side wall of the top bearing support 220 and the energy dissipation damping element 230 provides damping force to the vibration isolation system.

[0064] The lateral pressure of the interference fit should be in the range of 1 to 2 kN. This range will result in the best friction energy dissipation effect. The greater the lateral pressure, the greater the friction energy dissipation during movement, and the corresponding increase in the additional damping ratio.

[0065] The elastic element 240 is fixed to the top pressure support 220. When vibration occurs, the inertial force caused by the weight of non-structural components such as electromechanical pipelines on the crossarm 120 is transmitted to the hanger 110 through the crossarm 120. The hanger 110 transmits the power to the vibration control assembly 200 through the top pressure support 220. The energy-dissipating damping element 230 in the vibration control assembly 200 drives the side wall of the top pressure support to move relative to the energy-dissipating damping element 230 through the force of the elastic element 240, resulting in frictional energy dissipation.

[0066] Among them, the matching relationship between damping energy dissipation and vibration isolation performance needs to be combined with Figure 4 Further selection is made through design. Typically, we require that the frequency ratio (excitation frequency ω / structural frequency ω) be adjusted after adding vibration isolation devices. n When the value is greater than 1, the damping and vibration isolation effect TR have a nonlinear inverse relationship.

[0067] This solution utilizes the synergistic action of spring elements and energy-dissipating damping elements to achieve vibration isolation and energy dissipation between the main structure and suspended components. This reduces vibration damage to non-structural suspended components such as electromechanical pipelines and prevents support detachment, thereby enhancing structural toughness. Furthermore, compared to traditional seismic supports, the vibration-isolated dual-control seismic support based on interference fit energy dissipation requires less installation space, facilitating construction.

[0068] In this invention, since the frequencies of human-induced vibration, mechanical vibration, and earthquake action are different, the specific corresponding vertical frequency for pedestrians is 1.6 to 2.4 Hz, the lateral frequency is 0.8 to 1.2 Hz, the mechanical vibration frequency range is 30 to 60 Hz, and the earthquake frequency range is 5 to 20 Hz, generally within 15 Hz.

[0069] Therefore, it is necessary to specifically design the stiffness and damping of the vibration isolation type dual-control support based on interference fit energy dissipation. The load support frequency can satisfy the following formula:

[0070]

[0071] In the formula: K is the vertical stiffness of the load support; M is the load weight.

[0072] The ratio of the excitation frequency to the load support frequency should be greater than [value missing]. This is to fully utilize the vibration isolation capability of the spring and reduce the transmission of vibration energy.

[0073] In this invention, the addition of the elastic element 240 changes the vertical stiffness of the original rigid support and hanger. By rationally designing the spring stiffness, vibration attenuation from the main structure to the support and hanger is achieved.

[0074] Typically, spring element 240 can be a regular tension / compression spring or a shape memory alloy tension / compression spring (SMAs). Using SMAs can enhance the structural deformation recovery ability after earthquakes / vibrations and reduce residual displacement. According to the "Influence Analysis of Permanent Displacement on Seismic Response of Seismic Isolation Structures", in seismic isolation structures, the presence of residual displacement will cause the structural acceleration to increase by about 10% to 30% under seismic action, and the relative displacement of the structure to increase by about 10% to 40% under seismic action. Therefore, in the analysis stage, if there is a large residual displacement, SMAs should be preferred.

[0075] The vibration isolation type dual-control support and hanger device based on interference fit energy dissipation constructed by the above scheme achieves vibration isolation and energy consumption of the main structure and suspended components through the synergistic action of spring elements and energy dissipation elements. This reduces vibration damage to non-structural suspended components such as electromechanical pipelines and support and hanger detachment, thereby enhancing structural toughness.

[0076] Meanwhile, compared to traditional seismic bracing, the vibration isolation type dual-control seismic bracing based on interference fit energy dissipation requires less installation space and is easier to construct.

[0077] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A vibration isolation type dual-control support and hanger device based on interference fit energy dissipation, comprising a support and hanger assembly, characterized in that, The support and hanger assembly includes several hangers and a crossbeam. The crossbeam is set horizontally relative to the ground, and the several hangers are set vertically on the crossbeam and connected to the crossbeam to form a support and hanger structure. The device also includes a vibration dual control assembly, which is assembled at the top of the rod in the support and hanger assembly; the vibration dual control assembly includes a shell, a top pressure bearing support, an energy-dissipating damping element, and an elastic element; the rod is divided into two sections at the vibration dual control assembly, the upper section is connected to the top pressure bearing support by bolts, and the lower section is connected to the shell by bolts. The energy-dissipating damping element is fitted inside the outer casing and fixed to the outer casing; The elastic element is placed inside the space surrounded by the top pressure bearing support and the energy dissipation damping element, and the top pressure bearing support is fixedly connected to the top of the elastic element. The top pressure bearing support has a side wall, and the side wall of the top pressure bearing support is interference-fitted with the energy dissipation damping element. The lateral pressure of the interference fit is in the range of 1~2kN. The energy-dissipating damping element is a cylindrical damping sleeve made of a flexible rubber friction material with a thickness of 4-6 mm, and the elastic element is a spring; When vibration occurs, the inertial force caused by the weight of the non-structural components on the crossarm is transmitted to the hanger through the crossarm. The hanger transmits the power to the vibration control assembly through the top bearing support. The energy-dissipating damping element in the vibration control assembly drives the side wall of the top bearing support to move relative to the energy-dissipating damping element through the action of the elastic element, resulting in frictional energy dissipation. The stiffness and damping of the vibration isolation type dual-control support and hanger, and the frequency of the load support and hanger can satisfy the following formula: In the formula: K is the vertical stiffness of the load-bearing support; M represents the load weight; And the ratio of the excitation frequency to the load support frequency is greater than .

2. The vibration isolation type dual-control support and hanger device based on interference fit energy dissipation according to claim 1, characterized in that, The lateral pressure of the interference fit between the side wall of the top bearing support and the energy-dissipating damping element is within 1~2kN.

3. The vibration isolation type dual-control support and hanger device based on interference fit energy dissipation according to claim 1, characterized in that, The allowable tensile force of the boom satisfies the following formula: In the formula: Ns is the allowable value of the tension of the rod; As is the cross-sectional area of ​​the root of the threaded rod; [σ] is the allowable stress, and f1 is the allowable stress reduction coefficient.

4. The vibration isolation type dual-control support and hanger device based on interference fit energy dissipation according to claim 3, characterized in that, The allowable stress reduction factor is 0.6~0.

8.

5. The vibration isolation type dual-control support and hanger device based on interference fit energy dissipation according to claim 3, characterized in that, The cross-sectional area As at the root of the threaded rod satisfies the following formula: ； In the formula: d is the nominal diameter of the threaded rod; P is the pitch; es is the upper deviation of the threaded rod diameter; Td2 is the tolerance of the threaded rod pitch diameter; f2 is the root section adjustment coefficient.

6. The vibration isolation type dual-control support and hanger device based on interference fit energy dissipation according to claim 5, characterized in that, The value of f2 is 0.95.

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