A test device for testing the anti-seismic performance of a wind pipe

Abstract

The utility model relates to the field of duct anti-seismic performance test discloses a kind of test device for duct anti-seismic performance test, including bearing frame, the top of bearing frame is fixedly connected with linear guide rail, the inner wall of linear guide rail is slidably connected with vibration platform, the outer wall of bearing frame is fixedly connected with static pressure support actuator assembly, the outer wall of bearing frame is provided with actuator suspension mechanism, the actuator suspension mechanism includes lifting ring shackle, the bottom of lifting ring shackle is detachably connected in the top of static pressure support actuator assembly, the top of lifting ring shackle is fixedly connected with connecting plate, the top of connecting plate is fixedly connected with screw rod. In the utility model, through actuator suspension mechanism, it is fixed in bearing frame by fixed righting flange, adjusting nut calibrates actuator horizontal state, adjusts spring buffer lateral force, lifting ring shackle and connecting plate balance actuator dead weight, ensure that power output is stable and accurate.

Description

Technical Field

[0001] This utility model relates to the field of seismic performance testing of air ducts, and in particular to a test device for testing the seismic performance of air ducts. Background Technology

[0002] The test device for seismic performance testing of air ducts is a specialized test equipment used to simulate the stress state of air ducts under seismic conditions. It tests the structural integrity, connection reliability and resistance to damage of air ducts by applying specific vibration loads. Its core function is to reproduce the action of seismic waves of different intensities and verify whether the air ducts meet the relevant seismic code requirements.

[0003] In existing technologies, seismic performance testing of duct components is mostly performed using a general-purpose vibration testing bench. During operation, the height of the test bench and the position of the fixing devices are first adjusted according to the size and weight of the duct. Then, the duct is directly fixed above the vibration bench using a temporary support or clamp, ensuring relative stability between the duct and the bench. Next, the vibration frequency, amplitude, and duration parameters of the vibration bench are set according to preset test standards. After starting the equipment, the vibration bench drives the bench and the duct to reciprocate, simulating the dynamic effects of an earthquake. During the test, sensors collect the vibration response data of the duct. After the test, the appearance of the duct and the condition of the connection points are observed to evaluate its seismic performance.

[0004] However, existing technologies have certain limitations in practical applications. In buildings, ducts are mostly suspended and installed in the upper space of the building. The existing general equipment tests the ducts by placing them on a platform. This method does not match the stress state and installation form of ducts in real-world usage scenarios. It is difficult to accurately reproduce the actual stress and vibration response of ducts during earthquakes, resulting in a lack of sufficient specificity and reliability in the assessment of their seismic performance. Therefore, based on the above, a test device for testing the seismic performance of ducts is proposed. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a test device for testing the seismic performance of air ducts, aiming to solve the problem in the prior art that "the existing general equipment places the air duct above the table for testing, which does not match the stress state and installation form of the air duct in the actual use scenario, and it is difficult to accurately reproduce the actual stress and vibration response of the air duct during an earthquake".

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a test device for testing the seismic performance of air ducts, comprising a bearing frame, a linear guide rail fixedly connected to the top of the bearing frame, a vibration platform slidably connected to the inner wall of the linear guide rail, a static pressure support actuator assembly fixedly connected to the outer wall of the bearing frame, and an actuator suspension mechanism provided on the outer wall of the bearing frame. The actuator suspension mechanism includes a lifting ring shackle. The bottom of the lifting ring shackle is detachably connected to the top of the hydrostatic support actuator assembly. A connecting plate is fixedly connected to the top of the lifting ring shackle. A screw is fixedly connected to the top of the connecting plate. A fixing and straightening flange is fixedly connected to the outer wall of the screw. An adjusting spring is sleeved on the outer wall of the screw. An adjusting nut is threadedly connected to the outer wall of the screw.

[0007] As a further description of the above technical solution: the outer wall of the screw extends upward through the inner wall of the bearing frame, and the adjusting nut is located on the outer wall of the upper extension end of the screw.

[0008] As a further description of the above technical solution: the fixed centering flange is located between the adjusting nut and the fixed centering flange.

[0009] As a further description of the above technical solution: there are two linear guides, which are located on the top two sides of the support frame, and the linear guides are threaded to the top of the support frame by screws.

[0010] As a further description of the above technical solution: a test specimen is provided at the bottom of the load-bearing frame.

[0011] As a further description of the above technical solution: the front end of the load-bearing frame is provided with a triangular connecting frame, the crossbeam and the column are provided with a diagonal bracing structure, the bottom plate of the load-bearing frame is provided with foot holes and the bottom surface is provided with shock-absorbing pads.

[0012] This utility model has the following beneficial effects: 1. In this utility model, the actuator suspension mechanism is fixed to the bearing frame by a fixed straightening flange, the adjusting nut is used to calibrate the horizontal state of the actuator, the adjusting spring is used to buffer the lateral force, and the lifting ring shackle and connecting plate are used to balance the weight of the actuator, ensuring stable and accurate power output.

[0013] 2. In this utility model, the vertical and rotational displacement of the vibration platform is restricted by the linear guide rail, while only the horizontal degree of freedom is retained. With the installation holes reserved on the bottom surface of the vibration platform, the test specimen is stably fixed and vibrates synchronously in the lateral or longitudinal direction. Finally, through the precise cooperation of each key component, the seismic wave of different intensities in a single direction is simulated to achieve effective testing of the seismic performance of the duct specimen. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a test device for testing the seismic performance of air ducts proposed in this utility model; Figure 2 This is a schematic diagram of the bottom structure of a test device for testing the seismic performance of air ducts according to the present invention; Figure 3This is a schematic diagram of the actuator suspension mechanism of a test device for testing the seismic performance of air ducts proposed in this utility model.

[0015] Legend: 1. Bearing frame; 2. Vibration platform; 3. Linear guide rail; 4. Static pressure support actuator assembly; 5. Actuator suspension mechanism; 511. Lifting ring shackle; 512. Connecting plate; 513. Screw; 514. Fixed straightening flange; 515. Adjusting spring; 516. Adjusting nut; 6. Test specimen. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Reference Figures 1-3 This utility model provides an embodiment of a test device for testing the seismic performance of air ducts, comprising a load-bearing frame 1. The load-bearing frame 1 adopts a split bolt connection structure. The upper frame is an integral welded component to ensure the installation accuracy of the linear guide rail 3. The lower part is strengthened and rigidified by a triangular connection and a diagonal bracing structure. It can be fixed to the foundation by anchor bolts and the vibration transmission is reduced by the bottom shock-absorbing pad. It is also easy to disassemble and move. The top of the load-bearing frame 1 is fixedly connected to the linear guide rail 3. The linear guide rail 3 restricts the vertical and rotational displacement of the vibration platform 2, retaining only the horizontal degree of freedom. The inner wall of the linear guide rail 3 is slidably connected to the vibration platform 2. The bottom surface of the vibration platform 2 has multiple sets of mounting holes. The test specimen 6 can be fixed laterally or longitudinally by a seismic bracket, and the installation height meets the requirements for personnel to work upright. The outer wall of the load-bearing frame 1 is fixedly connected to a static pressure support actuator assembly 4. The static pressure support actuator assembly 4 is composed of... Powered by an independent, movable hydraulic oil source, the hydraulic energy is converted into reciprocating motion power through an electro-hydraulic servo valve controlled by the control system in the control cabinet. Its head and tail ball joint devices are connected to the vibration platform 2 and the bearing frame 1 respectively. High-frequency vibration is achieved by using hydrostatic support technology to simulate seismic waves of different intensities in a single direction. An actuator suspension mechanism 5 is provided on the outer wall of the bearing frame 1. The actuator suspension mechanism 5 is fixed to the upper middle beam of the bearing frame 1 by a fixed straightening flange 514. The length of the screw 513 is adjusted by adjusting nut 516 to calibrate the horizontal state of the actuator. The adjusting spring 515 sleeved on the screw 513 can buffer abnormal lateral forces. The connecting plate 512 and the lifting ring shackle 511 connect the screw 513 and the actuator to balance its own weight. The actuator suspension mechanism 5 includes the lifting ring shackle 511, which connects the screw 513 and the hydrostatic support actuator assembly 4 to balance its own weight.

[0018] Reference Figures 1-3 The bottom of the lifting ring shackle 511 is detachably connected to the top of the hydrostatic support actuator assembly 4. A connecting plate 512 is fixedly connected to the top of the lifting ring shackle 511, which secures the lifting ring shackle 511 to the screw 513. The screw 513 is fixedly connected to the top of the connecting plate 512. The length of the screw 513 can be adjusted by adjusting the nut 516 to calibrate the horizontal state of the hydrostatic support actuator assembly 4. A fixing flange 514 is fixedly connected to the outer wall of the screw 513, which fixes the actuator suspension mechanism 5 to the... The upper beam of the load-bearing frame 1 has an adjusting spring 515 fitted on the outer wall of the screw 513. The adjusting spring 515 can buffer abnormal lateral forces. The outer wall of the screw 513 is threaded with an adjusting nut 516. The adjusting nut 516 is used to adjust the length of the screw 513 to calibrate the horizontal state of the hydrostatic support actuator assembly 4. The outer wall of the screw 513 extends upward through the inner wall of the load-bearing frame 1. The adjusting nut 516 is located on the outer wall of the upper extension end of the screw 513. The fixed straightening flange 514 is located between the adjusting nut 516 and the fixed straightening flange 514.

[0019] Reference Figures 1-3 There are two linear guide rails 3, which are located on the top two sides of the bearing frame 1. The linear guide rails 3 are connected to the top of the bearing frame 1 by screws. The two linear guide rails 3 together restrict the vertical and rotational displacement of the vibration platform 2, leaving only the horizontal degree of freedom. The bottom of the bearing frame 1 is equipped with a test specimen 6, which vibrates synchronously with the vibration platform 2 to simulate real earthquake conditions. Finally, its seismic performance is evaluated by observing whether there is obvious damage, screw falling off, etc. The front end of the bearing frame 1 is equipped with a triangular connecting frame, which strengthens the strength and stiffness of the bearing frame 1. A diagonal bracing structure is provided between the crossbeam and the column, which strengthens the strength and stiffness of the bearing frame 1. The bottom plate of the bearing frame 1 has anchor holes, and the bottom surface has anchor holes for fixing the bearing frame 1 to the foundation with anchor bolts. The vibration damping pad is used to reduce vibration transmission.

[0020] Working principle: The duct seismic performance testing device uses the load-bearing frame 1 as the core support foundation. It adopts a split bolt connection structure. The upper frame is an integral welded component to ensure the installation accuracy of the linear guide rail 3. The lower part strengthens the strength and rigidity through triangular connection and diagonal bracing structure. It can be fixed to the foundation with anchor bolts and reduce vibration transmission with the help of bottom shock-absorbing pads. At the same time, it is easy to disassemble and move.

[0021] The vibration platform 2 is connected to the bearing frame 1 through linear guide rails 3 on both sides. The linear guide rails 3 restrict its vertical and rotational displacement, retaining only the horizontal degree of freedom. Multiple sets of mounting holes are reserved on the bottom surface of the platform, and the test specimen 6 can be fixed in a horizontal or longitudinal manner through the anti-seismic bracket. The installation height meets the needs of personnel to work upright.

[0022] The hydrostatic support actuator assembly 4 serves as the power core, powered by an independent and movable hydraulic oil source. It is controlled by the control system in the control cabinet and converts hydraulic energy into reciprocating motion power through an electro-hydraulic servo valve. Its head and tail ball joint devices are connected to the vibration platform 2 and the bearing frame 1 respectively. It uses hydrostatic support technology to achieve high-frequency response vibration to simulate seismic waves of different intensities in a single direction.

[0023] The actuator suspension mechanism 5 is fixed to the upper middle beam of the bearing frame 1 via a fixed straightening flange 514. The length of the screw 513 is adjusted using an adjusting nut 516 to calibrate the actuator's horizontal state. The adjusting spring 515 fitted onto the screw 513 can buffer abnormal lateral forces. The connecting plate 512 and the lifting ring shackle 511 connect the screw 513 to the actuator to balance its own weight. During operation, the hydraulic oil source drives the hydrostatic support actuator assembly 4 to push the vibration platform 2 to perform horizontal reciprocating motion along the linear guide rail 3. The test specimen 6 vibrates synchronously with the platform to simulate real earthquake conditions. Finally, its seismic performance is evaluated by observing whether the specimen shows obvious damage, screw loosening, or other phenomena.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A test apparatus for testing the seismic performance of air ducts, comprising a load-bearing frame (1), characterized in that: The top of the bearing frame (1) is fixedly connected to a linear guide rail (3), the inner wall of the linear guide rail (3) is slidably connected to a vibration platform (2), the outer wall of the bearing frame (1) is fixedly connected to a hydrostatic support actuator assembly (4), and the outer wall of the bearing frame (1) is provided with an actuator suspension mechanism (5). The actuator suspension mechanism (5) includes a lifting ring shackle (511), the bottom of which is detachably connected to the top of the hydrostatic support actuator assembly (4). A connecting plate (512) is fixedly connected to the top of the lifting ring shackle (511), and a screw (513) is fixedly connected to the top of the connecting plate (512). A fixing and straightening flange (514) is fixedly connected to the outer wall of the screw (513), and an adjusting spring (515) is sleeved on the outer wall of the screw (513). An adjusting nut (516) is threadedly connected to the outer wall of the screw (513).

2. The test apparatus for testing the seismic performance of air ducts according to claim 1, characterized in that: The outer wall of the screw (513) extends upward through the inner wall of the bearing frame (1), and the adjusting nut (516) is located on the outer wall of the upper extension end of the screw (513).

3. The test apparatus for testing the seismic performance of air ducts according to claim 1, characterized in that: The fixed straightening flange (514) is located between the adjusting nut (516) and the fixed straightening flange (514).

4. The test apparatus for testing the seismic performance of air ducts according to claim 1, characterized in that: The number of linear guides (3) is two, and the two linear guides (3) are located on the top two sides of the support frame (1) respectively. The linear guides (3) are threaded to the top of the support frame (1) by screws.

5. The test apparatus for testing the seismic performance of air ducts according to claim 1, characterized in that: The test specimen (6) is provided at the bottom of the load-bearing frame (1).

6. The test apparatus for testing the seismic performance of air ducts according to claim 1, characterized in that: The front end of the load-bearing frame (1) is provided with a triangular connecting frame, and a diagonal bracing structure is provided between the crossbeam and the column. The bottom plate of the load-bearing frame (1) is provided with foot holes and a shock-absorbing pad is provided on the bottom surface.

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