Dynamic test detection platform for metal structure of crane

Abstract

The utility model discloses a dynamic test detection platform for a crane metal structure, and particularly relates to the technical field of dynamic test detection platforms for metal structures, the dynamic test detection platform comprises an outer frame seat, a basic mass block is arranged in the outer frame seat, an empty groove is formed in the upper end face of the basic mass block, a deck plate is arranged in the empty groove, and the deck plate is arranged in the empty groove. An air bag type buffer structure is arranged between the basic mass block and the outer frame seat, the air bag type buffer structure comprises a first connecting seat connected to the outer surface wall of the basic mass block, and a second fixing plate is connected into a groove reserved in the first connecting seat. The air bag type buffer structure is arranged, traditional spring buffer is replaced by air bag type buffer, good performance can be kept in a severe environment, the air bag type buffer is not prone to being affected by corrosive substances such as seawater and salt mist, the air bag type buffer structure can still keep good performance after being used for a long time, the vibration isolation effect is ensured, and the service life of the air bag type buffer structure is prolonged. And the frequency of maintenance and replacement is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of metal structure dynamic test and detection platforms, in particular to a crane metal structure dynamic test and detection platform. Background Art

[0002] Cranes, also known as marine cranes, are essential equipment in the modern shipping industry. They are used for cargo loading and unloading operations on ships and are often subjected to various dynamic loads under complex working conditions. These include impact loads from sudden lifting and unloading of the load, impacts from starting and braking, structural resonance of tracked machinery, flutter caused by wind loads, and seismic loads. These loads place increasingly high demands on cranes, requiring them to not only have a high lifting capacity but also ensure operational stability and safety in complex sea conditions. Therefore, prior to use, the crane's metal structure must be rigorously inspected and evaluated using a test platform.

[0003] Application No. 201110009086.0 discloses a dynamic test and detection platform for crane metal structures. "The vibration isolation buffer device includes horizontal vibration isolation buffer springs and vertical vibration isolation buffer springs. The horizontal vibration isolation buffer springs are arranged around the basic mass block, and the vertical vibration isolation buffer springs are arranged under the bottom surface of the basic mass block. The basic mass block is connected to the ground foundation through the vibration isolation buffer device." In the above, vibration isolation buffer springs are used to prevent the impact of the surrounding environment during the vibration test, but the vibration isolation buffer springs will age with the passage of time, resulting in a decrease in their elastic properties, which directly affects the effectiveness of the test. The aged springs cannot provide the original vibration isolation effect, and the test results are likely to deviate from the actual situation. The vibration isolation springs have nonlinear characteristics, which can easily lead to different responses under different load conditions, thereby affecting the consistency and reliability of the test data. In addition, if the position of the vibration isolation buffer spring is not accurately installed, it can easily lead to eccentric loads or asymmetric loads, thereby affecting the accuracy of the test. Utility Model Content

[0004] The purpose of the utility model is to provide a dynamic test and detection platform for the metal structure of a crane, so as to solve the above-mentioned deficiencies in the technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dynamic test and detection platform for a crane metal structure, comprising an outer frame seat, a basic mass block is provided inside the outer frame seat, an empty slot is provided on the upper end surface of the basic mass block, a table panel is provided inside the empty slot, a plurality of mounting screw holes are equidistantly and evenly provided on the upper end surface of the table panel for mounting a crane specimen, a horizontal loading device is provided in a ball joint in a placement slot provided on the upper end surface of the basic mass block and located outside the empty slot, the output end of the horizontal loading device is connected to the outer wall of the table panel by a ball joint, a vertical loading device is provided in the empty slot and located at the lower end of the table panel by a ball joint, the output end of the vertical loading device is connected to the table panel by a ball joint, (the horizontal loading device and the vertical loading device can be hydraulic cylinders, electric cylinders or other forms of driving devices), the The test and detection platform also includes an excitation system and a data acquisition and analysis system. The excitation system includes an exciter, an exciter base, an excitation controller and a movable bracket. The data acquisition and analysis system includes a data acquisition instrument, analysis and processing software and sensors (not shown in the figure). The exciter base is installed on the movable bracket to load the specimen at different positions and in different directions. The output force of the exciter is controlled by the excitation controller, which can simulate the crane's lifting load, yaw load, sudden lifting or unloading of the load, periodic pulsation or pseudo-dynamic force, etc., to realize the status test detection of the crane structure and mechanism (the sensor can be a measuring sensor, such as a stress and strain sensor, an optical fiber sensor, an acceleration sensor, a displacement sensor, etc., and the sensor type is determined according to the purpose of the experiment). The signal collected by the measuring sensor is calculated and analyzed by the data acquisition and analysis system.

[0006] Preferably, an airbag-type buffer structure is provided between the basic mass block and the outer frame seat, and the airbag-type buffer structure includes a first connecting seat connected to the outer wall of the basic mass block, a second fixing plate is connected in a groove reserved in the first connecting seat, one end of the second fixing plate is connected to the airbag, the end of the airbag away from the second fixing plate is connected to the first fixing plate, the outer wall of the first fixing plate is connected to the second connecting seat, and the second connecting seat is connected to the inner wall of the outer frame seat. A pressure sensor (not shown in the figure) is provided inside the airbag for real-time monitoring of the pressure inside the airbag to ensure that the air pressure is within a safe range. There are multiple airbag-type buffer structures, and the multiple airbag-type buffer structures are respectively located on the outer wall and bottom of the basic mass block.

[0007] Through the above technical solution:

[0008] During the test, the airbag is installed on the four sides and bottom of the basic mass block through the first connecting seat, the second connecting seat, the first fixing plate and the second fixing plate. The airbag is made of high-strength, corrosion-resistant synthetic rubber or other elastic materials, and has sufficient elasticity and durability, so that it can maintain good performance in harsh environments, is not easily affected by corrosive substances such as seawater and salt spray, and can still maintain good performance after long-term use, ensuring the vibration isolation effect. In addition, it can also effectively absorb impact forces from all directions, providing a more stable environment for the test, ensuring the consistency and reliability of the test data, and the airbag generates less noise during operation, which is conducive to creating a better working environment.

[0009] Preferably, a hollow partition is fixedly connected to the interior of the airbag.

[0010] Specifically, the hollow partition guides the airflow to be more evenly distributed inside the airbag, preventing the air pressure in local areas from being too high or too low, ensuring that the airbag can deform evenly when bearing a load, improving the cushioning effect in dynamic tests, and ensuring the stability and safety of the equipment during the test.

[0011] Preferably, an inflatable structure is provided on the outside of the airbag-type buffer structure, and the inflatable structure includes two first inflatable tubes and four second inflatable tubes arranged on the inner wall of the outer frame seat, the two second inflatable tubes are connected to one first inflatable tube, and a connecting tube is connected between the two first inflatable tubes.

[0012] Preferably, the airbag-type cushioning structure also includes an air outlet disk arranged inside the airbag, one end of the air outlet disk is connected to an air inlet pipe with a switch valve, the air inlet end of the air inlet pipe passes through the first fixed plate and the second connecting seat in sequence and extends to the inner wall of the outer frame seat and is connected to the first inflation tube and the second inflation tube. After the pressure sensor monitors that the pressure value is reached, the switch valve is closed to prevent the airbag that has reached the air pressure from being further inhaled.

[0013] Preferably, one end of the first inflation tube is connected to a short inflation tube, and the inlet end of the short inflation tube is plugged with a sealing cover.

[0014] Through the above technical solution:

[0015] Before the test, open the sealing cover and connect the inflation device to the inflation short tube, so that the gas enters the first inflation tube and the second inflation tube, enters the air outlet disk through the air inlet pipe, and is finally blown into the interior of the airbag by the air outlet disk, so as to realize the inflation operation of the airbag. During the test, the gas pressure inside the airbag can be adjusted at any time, thereby changing its stiffness and damping characteristics, making it suitable for a variety of different test conditions and loads, ensuring that the optimal buffering state can be maintained throughout the test.

[0016] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0017] 1. By setting up an airbag-type buffer structure and replacing the traditional spring buffer, the airbag buffer can maintain good performance in harsh environments during testing and is not easily affected by corrosive substances such as seawater and salt spray. It can still maintain good performance after long-term use, ensuring the vibration isolation effect and reducing the frequency of maintenance and replacement. In addition, it can also effectively absorb impact forces from all directions, providing a more stable environment for testing and ensuring the consistency and reliability of test data;

[0018] 2. By setting up an inflatable structure, the testing platform has an inflation function. During the test, the gas pressure inside the airbag can be adjusted, thereby changing its stiffness and damping characteristics, making it suitable for a variety of test conditions and loads. During the test, adjustments can be made at any time to respond to changes in test conditions in real time, ensuring that the optimal cushioning state is maintained throughout the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is one of the cutaway schematic diagrams of the present utility model;

[0022] Figure 3 This is the second cutaway diagram of the present utility model;

[0023] Figure 4 This is a schematic cross-sectional view of the airbag-type buffer structure of the present invention;

[0024] Figure 5 This is an enlarged schematic diagram of the connection between the airbag-type cushioning structure and the inflatable structure of the utility model;

[0025] Figure 6 It is a schematic diagram of the inflation structure of the utility model.

[0026] Description of reference numerals:

[0027] 1. Outer frame seat; 2. Basic mass block; 3. Empty slot; 4. Table panel; 5. Horizontal loading device; 6. Vertical loading device; 7. Airbag buffer structure; 71. First connecting seat; 72. Second connecting seat; 73. First fixing plate; 74. Second fixing plate; 75. Airbag; 76. Hollow partition; 8. Inflatable structure; 81. First inflation tube; 82. Second inflation tube; 83. Connecting tube; 84. Air outlet plate; 85. Air inlet pipe; 86. Inflatable short tube; 87. Sealing cover; 9. Mounting screw hole. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] The utility model provides Figure 1-Figure 3 A dynamic test and detection platform for a crane metal structure is shown, comprising:

[0030] The outer frame seat 1 has a basic mass block 2 inside the outer frame seat 1, an empty slot 3 is provided on the upper end surface of the basic mass block 2, a table panel 4 is provided inside the empty slot 3, and a plurality of mounting screw holes 9 are evenly and evenly provided on the upper end surface of the table panel 4 for mounting a crane specimen. A horizontal loading device 5 is provided in a ball joint in a placement slot provided on the upper end surface of the basic mass block 2 and located outside the empty slot 3. The output end of the horizontal loading device 5 is connected to the outer wall of the table panel 4 by a ball joint. A vertical loading device 6 is provided in a ball joint inside the empty slot 3 and located at the lower end of the table panel 4. The output end of the vertical loading device 6 is connected to the table panel 4 by a ball joint (the horizontal loading device 5 and the vertical loading device 6 can be hydraulic cylinders, electric cylinders or other forms of driving devices). The test and detection platform also includes an excitation system and a data acquisition and analysis system The excitation system includes an exciter, an exciter base, an excitation controller and a movable bracket. The data acquisition and analysis system includes a data acquisition instrument, analysis and processing software and a sensor (not shown). The exciter base is installed on the movable bracket to load the specimen in different positions and directions. The output force of the exciter is controlled by the excitation controller, which can simulate the crane's lifting load, yaw load, sudden lifting or unloading of the load, periodic pulsation or pseudo-dynamic force, etc., to realize the status test detection of the crane structure and mechanism (the sensor can be a measuring sensor, such as a stress and strain sensor, an optical fiber sensor, an acceleration sensor, a displacement sensor, etc., and the sensor type is determined according to the purpose of the experiment). The signal collected by the measuring sensor is calculated and analyzed by the data acquisition and analysis system.

[0031] The utility model provides Figure 2-Figure 5A dynamic test and detection platform for the metal structure of a crane is shown, and an airbag-type buffer structure 7 is provided between the basic mass block 2 and the outer frame seat 1. The airbag-type buffer structure 7 includes a first connecting seat 71 connected to the outer wall of the basic mass block 2, and a second fixing plate 74 is connected to the groove reserved in the first connecting seat 71. One end of the second fixing plate 74 is connected to an airbag 75, and the end of the airbag 75 away from the second fixing plate 74 is connected to the first fixing plate 73. The outer wall of the first fixing plate 73 is connected to the second connecting seat 72, and the second connecting seat 72 is connected to the inner wall of the outer frame seat 1. A pressure sensor (not shown) is provided inside the airbag 75 for real-time monitoring of the pressure inside the airbag 75 to ensure that the air pressure is within a safe range. There are multiple airbag-type buffer structures 7, and the multiple airbag-type buffer structures 7 are respectively located on the outer wall and bottom of the basic mass block 2.

[0032] Through the above technical solution:

[0033] During the test, the airbag 75 is installed on the four sides and bottom of the basic mass block 2 through the first connecting seat 71, the second connecting seat 72, the first fixing plate 73 and the second fixing plate 74. The airbag 75 is made of high-strength, corrosion-resistant synthetic rubber or other elastic materials, and has sufficient elasticity and durability, so that it can maintain good performance in harsh environments, and is not easily affected by corrosive substances such as seawater and salt spray. It can still maintain good performance after long-term use, ensuring the vibration isolation effect. In addition, it can also effectively absorb impact forces from all directions, providing a more stable environment for the test, ensuring the consistency and reliability of the test data, and the airbag 75 generates less noise during operation, which is conducive to creating a better working environment.

[0034] Further, see Figure 4 As shown, a hollow partition 76 is fixedly connected to the interior of the airbag 75.

[0035] Specifically, the hollow partition 76 guides the airflow to be distributed more evenly inside the airbag 75, preventing the air pressure in local areas from being too high or too low, ensuring that the airbag 75 can deform evenly when bearing load, improving the cushioning effect in dynamic tests, and ensuring the stability and safety of the equipment during the test.

[0036] The utility model provides Figure 2 、 Figure 4-Figure 6 The figure shows a dynamic test and detection platform for the metal structure of a crane. An inflatable structure 8 is provided on the outer side of the airbag-type buffer structure 7. The inflatable structure 8 includes two first inflatable tubes 81 and four second inflatable tubes 82 provided on the inner wall of the outer frame seat 1. The two second inflatable tubes 82 are connected to the one first inflatable tube 81, and a connecting tube 83 is connected between the two first inflatable tubes 81.

[0037] The airbag-type buffer structure 7 also includes an air outlet plate 84 arranged inside the airbag 75. One end of the air outlet plate 84 is connected to an air inlet pipe 85 with a switch valve. The air inlet end of the air inlet pipe 85 passes through the first fixed plate 73 and the second connecting seat 72 in sequence and extends to the inner wall of the outer frame seat 1 and is connected to the first inflation tube 81 and the second inflation tube 82. After the pressure sensor monitors that the pressure value is reached, the switch valve is closed to prevent the airbag 75 that has reached the air pressure from taking in more air.

[0038] An end portion of one of the first inflation tubes 81 is connected to an inflation short tube 86 , and a sealing cap 87 is plugged at the inlet end of the inflation short tube 86 .

[0039] Through the above technical solution:

[0040] Before the test, open the sealing cover 87 and connect the inflation device to the inflation short tube 86, so that the gas enters the first inflation tube 81 and the second inflation tube 82, enters the air outlet plate 84 through the air inlet pipe 85, and is finally blown into the interior of the airbag 75 by the air outlet plate 84, thereby realizing the inflation operation of the airbag 75. During the test, the gas pressure inside the airbag 75 can be adjusted at any time, thereby changing its stiffness and damping characteristics, making it suitable for a variety of different test conditions and loads, ensuring that the best buffering state can be maintained throughout the test.

[0041] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A dynamic test and detection platform for crane metal structures, characterized in that: include: An outer frame seat (1), wherein a basic mass block (2) is provided inside the outer frame seat (1), a hollow groove (3) is provided on the upper end surface of the basic mass block (2), a table panel (4) is provided inside the hollow groove (3), and an airbag-type buffer structure (7) is provided between the basic mass block (2) and the outer frame seat (1); The airbag-type buffer structure (7) includes a first connecting seat (71) connected to the outer wall of the basic mass block (2); a second fixing plate (74) is connected to a groove reserved in the first connecting seat (71); an airbag (75) is connected to one end of the second fixing plate (74); an end of the airbag (75) away from the second fixing plate (74) is connected to the first fixing plate (73); the outer wall of the first fixing plate (73) is connected to the second connecting seat (72); and the second connecting seat (72) is connected to the inner wall of the outer frame seat (1).

2. The dynamic test and detection platform for crane metal structures according to claim 1, characterized in that: A hollow partition (76) is fixedly connected to the interior of the airbag (75), and a plurality of the airbag-type buffer structures (7) are provided. The plurality of airbag-type buffer structures (7) are respectively located on the outer wall and the bottom of the basic mass block (2).

3. The dynamic test and detection platform for crane metal structures according to claim 1, characterized in that: An inflatable structure (8) is provided on the outside of the airbag-type cushioning structure (7), and the inflatable structure (8) includes two first inflatable tubes (81) and four second inflatable tubes (82) provided on the inner wall of the outer frame seat (1), the two second inflatable tubes (82) are connected to the one first inflatable tube (81), and a connecting tube (83) is connected between the two first inflatable tubes (81).

4. The dynamic test and detection platform for crane metal structures according to claim 3, characterized in that: The airbag-type cushioning structure (7) further comprises an air outlet disc (84) disposed inside the airbag (75), one end of the air outlet disc (84) being connected to an air inlet pipe (85) having a switch valve, the air inlet end of the air inlet pipe (85) sequentially passing through the first fixing plate (73) and the second connecting seat (72) and extending to the inner wall of the outer frame seat (1) to be connected to the first inflation pipe (81) and the second inflation pipe (82).

5. The dynamic test and detection platform for crane metal structures according to claim 4, characterized in that: The end of one of the first inflation tubes (81) is connected to an inflation short tube (86), and the inlet end of the inflation short tube (86) is plugged with a sealing cover (87).

6. The dynamic test and detection platform for crane metal structures according to claim 1, characterized in that: A horizontal loading device (5) is provided on the upper end surface of the basic mass block (2) and in a placement groove located outside the empty groove (3). The output end of the horizontal loading device (5) is connected to the outer wall of the table panel (4) through a ball joint. A vertical loading device (6) is provided on the inside of the empty groove (3) and in a ball joint located at the lower end of the table panel (4). The output end of the vertical loading device (6) is connected to the table panel (4) through a ball joint.

7. The dynamic test and detection platform for crane metal structures according to claim 1, characterized in that: The upper end surface of the table panel (4) is provided with a plurality of mounting screw holes (9) at equal and uniform intervals.

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