A test fixture for tilting and swaying of marine low-pressure components

Abstract

This utility model relates to a testing fixture for tilting and swaying of marine low-voltage components, comprising a tilting support unit, a motion unit, and a traction unit. The tilting support unit provides support for the tilting and swaying of the motion unit and adjusts the tilt angle of the motion unit. The motion unit tilts and sways under the drive of the traction unit. The traction unit flexibly controls the speed of tilting and swaying by coordinating the speed adjustment of the traction motor and the weight selection of the counterweight, meeting the verification requirements of various test angles and cycles. This utility model enables laboratory testing of low-voltage components under simulated wave fluctuations, including forward and backward tilting, left and right tilting, and continuous swaying, under relatively realistic working conditions of marine circuit breakers. It also offers high flexibility, with adjustable tilt angles and swaying durations to meet various customer verification needs, while the tilt angle reaches international testing and certification standards.

Description

Technical Field

[0001] This utility model belongs to the field of testing equipment technology, specifically relating to a test fixture for tilting and swaying of marine low-pressure components. Background Technology

[0002] Marine low-voltage components, such as molded case circuit breakers, miniature circuit breakers, disconnect switches, and automatic transfer switches, serve as control and protection devices for marine electrical systems. They undertake core functions such as fault current interruption, line protection, and system isolation, and their reliability is directly related to the safe operation of ships in complex marine environments.

[0003] Because ocean waves cause ships to roll and tilt during navigation, this can subject the mechanical components of low-voltage components to additional stress, accelerating wear and affecting the performance of actuating mechanisms. This can lead to malfunctions, impacting the stability of the ship's power supply system and potentially causing economic losses. Therefore, it is crucial to verify the characteristics of marine low-voltage components under real-world conditions of tilting and rolling.

[0004] Currently, most existing tilting and swaying test platforms are large platforms designed using a combination of hydraulic cylinders and servo motors, primarily for testing large, heavy equipment. However, low-voltage components are smaller in size, and using existing tilting and swaying test platforms would result in unnecessary energy consumption. At the same time, existing test platforms require a large footprint and have poor mobility, failing to flexibly meet usage requirements.

[0005] To solve the above problems, this utility model designs a test fixture for tilting and swaying of marine low-pressure components. Summary of the Invention

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a marine low-voltage component tilting and swaying test fixture, which is used to simulate the rolling and tilting of a ship caused by ocean waves to complete the safety and reliability test of low-voltage components and other products. It has the advantages of low cost, small size, portability, convenient use and low energy consumption.

[0007] The technical problem solved by this utility model is achieved through the following technical solution: A test fixture for tilting and swaying of marine low-pressure components includes a tilting support unit, a motion unit, and a traction unit; The inclined support unit includes a base plate and four longitudinal support legs fixedly installed on the base plate. Two transverse fixing grooves are arranged horizontally parallel above the four longitudinal support legs. Two motion unit positioning beams are arranged between the transverse fixing grooves at intervals. Rotary shaft mounting plates are symmetrically arranged on both sides of the base plate. The motion unit is rotatably connected between the rotating shaft mounting plates through a rotating shaft. The inclined support unit provides support for the tilting and swaying of the motion unit. The motion unit is an L-shaped motion plate, which includes front and rear motion vertical plates and left and right motion vertical plates. The front and rear motion vertical plates and the left and right motion vertical plates are all equipped with longitudinal mounting rails and transverse mounting rails in a grid pattern. Low-voltage components are installed on the longitudinal mounting rails and transverse mounting rails. The motion unit tilts and swings under the drive of the traction unit. The traction unit includes a traction motor, a traction plate, a traction hole, a traction rope, a counterweight, and a fixed pulley. The traction motor is fixedly installed at the front end of the base plate, and the traction plate is fixedly installed at the top of the front and rear moving vertical plates. The end of the inclined support unit is equipped with a fixed pulley through the end of a laterally extending T-shaped beam. The end of the motor shaft of the traction motor is connected to the traction rope, and the rear end of the traction rope, which passes through the traction hole and the fixed pulley, is connected to the counterweight.

[0008] Furthermore, the motion unit positioning beam is slidably installed in the transverse fixing groove and fixed with bolts, and magnetic protractors are installed on the left and right motion vertical plates to control the tilt angle of the L-shaped motion plate.

[0009] Furthermore, casters are fixedly installed on both sides of the bottom end of the base plate.

[0010] Furthermore, the tilt angle of the motion unit is -45° to 45°.

[0011] The advantages and beneficial effects of this utility model are as follows: 1. The tooling of this utility model enables the simulation of the back-and-forth, left-and-right tilting and continuous swaying of low-voltage components caused by ocean wave fluctuations under relatively realistic working conditions of a marine circuit breaker in the laboratory.

[0012] 2. The tooling of this utility model has strong flexibility. The tilt angle and swing duration can be adjusted to meet various verification needs of customers. At the same time, the tilt angle can reach the international testing and certification level.

[0013] 3. The tooling structure of this utility model is simple and compact. The swing direction can be quickly switched by changing the product installation position. The power structure only requires one traction motor. The bottom is equipped with casters, which makes it convenient to replace the test platform at any time. Compared with the existing tilting swing test platform, it has many advantages such as small size, low cost, low energy consumption and convenient use.

[0014] 4. The tooling of this utility model has strong expandability, is compact and lightweight, and is not limited by the place of use. Therefore, it can be well combined with various test benches such as tripping limit and characteristic test, temperature rise test, residual current test and connection and disconnection test to explore the influence of different tilt angles and swing cycles on the relevant performance of low voltage component products, provide data support for the formulation and revision of product standards in the industry, and fill the research data gap in the field. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Explanation of reference numerals in the attached figures 1- Forward and backward moving vertical plate; 2- Left and right moving vertical plate; 3- Traction motor; 4- Traction rope; 5- Traction hole; 6- T-shaped crossbeam; 7- Counterweight; 8- Base plate; 9- Universal wheel; 10- Lateral fixing groove; 11- Longitudinal support leg; 12- Rotary shaft mounting plate; 13- Positioning beam; 14- Magnetic protractor; 15- Rotary shaft; 16- Longitudinal mounting rail; 17- Lateral mounting rail; 18- Traction plate; 19- Fixed pulley. Detailed Implementation

[0017] The present invention will be further described in detail below through specific embodiments. The following embodiments are only descriptive and not limiting, and should not be used to limit the protection scope of the present invention.

[0018] An innovative tooling for tilting and swaying tests of marine low-pressure components includes a tilting support unit, a motion unit, and a traction unit. The inclined support unit includes a base plate 8 and four longitudinal support legs 11 fixedly installed on the base plate 8. Two transverse fixing grooves 10 are arranged horizontally parallel above the four longitudinal support legs 11. Two motion unit positioning beams 13 are arranged at intervals between the transverse fixing grooves 10. Rotary shaft mounting plates 12 are symmetrically arranged on both sides of the base plate 8. The motion unit is rotatably connected between the rotating shaft mounting plates 12 through a rotating shaft 15. The inclined support unit provides support for the tilting and swaying of the motion unit. The motion unit is an L-shaped motion plate, which includes front and rear motion vertical plates 1 and left and right motion vertical plates 2. The front and rear motion vertical plates 1 and the left and right motion vertical plates 2 are all equipped with longitudinal mounting rails 16 and transverse mounting rails 17 arranged in a grid pattern. Low-voltage components are installed on the longitudinal mounting rails 16 and transverse mounting rails 17. The motion unit tilts and swings under the drive of the traction unit. The traction unit includes a traction motor 3, a traction plate 18, a traction hole 5, a traction rope 4, a counterweight 7, and a fixed pulley 19. The traction motor 3 is fixedly installed at the front end of the base plate 8, and the traction plate 18 is fixedly installed at the top of the front and rear moving vertical plates 1. The fixed pulley 19 is installed at the end of the inclined support unit through the end of the laterally extending T-shaped beam 6. The motor shaft end of the traction motor 3 is connected to the traction rope 4. The rear end of the traction rope 4, which passes through the traction hole 5 and the fixed pulley 19, is connected to the counterweight 7. This unit uses a speed-adjustable traction motor and a counterweight, which can flexibly control the movement of the moving unit. The speed adjustment of the traction motor and the weight selection of the counterweight work together to flexibly control the tilting and swaying speed, meeting the verification requirements of various test angles and cycles.

[0019] The tooling of this invention enables the simulation of the back-and-forth tilting, left-and-right tilting, and continuous swaying of low-voltage components caused by ocean wave fluctuations under relatively realistic working conditions of a marine circuit breaker in the laboratory.

[0020] The motion unit positioning beam 13 is slidably installed in the transverse fixing groove 10 and fixed with bolts. Magnetic protractors 14 are installed on the left and right motion vertical plates 2 to control the tilt angle of the L-shaped motion plate. The fixture has strong flexibility, and the tilt angle and swing duration can be adjusted to meet various verification needs of customers. At the same time, the tilt angle can reach the international testing and certification level.

[0021] The base plate 8 has casters 9 fixedly installed on both sides of its bottom end. The tooling structure is simple and compact. The swing direction can be quickly switched by changing the product installation position. The power structure only requires one traction motor. The casters at the bottom make it easy to replace the test platform with a suitable one at any time. Compared with the existing tilting swing test platform, it has many advantages such as small size, low cost, low energy consumption and convenient use.

[0022] The tooling of this utility model has strong scalability, is compact and lightweight, and is not limited by the place of use. Therefore, it can be well combined with various test benches such as tripping limit and characteristic tests, temperature rise tests, residual current tests, and connection and disconnection tests to explore the influence of different tilt angles and swing cycles on the relevant performance of low-voltage components. This provides data support for the formulation and revision of product standards in the industry and fills the gap in research data in the field.

[0023] The working principle of this utility model is as follows: 1. Tilt test (1) Select a low-voltage circuit breaker for testing. First, fix the circuit breaker on the front and rear moving vertical plates and adjust the tilt angle to a range of -45° to 45°. Four typical angles, -45°, -22.5°, 22.5°, and 45°, can be selected for testing. The tilt angle can also be set according to the test requirements. At each tilt angle, the circuit breaker is supplied with 1.3 times, 2 times, and 2.5 times the rated current using a circuit breaker tripping test bench. Record the tripping time of the thermomagnetic trip unit under overload conditions and verify whether maloperation will occur when the current is less than the rated current. (2) Then fix the circuit breaker on the left and right moving vertical plates and repeat the above test steps.

[0024] (3) After the tests in steps (1) and (2), the tripping limit and characteristic tests of the circuit breaker under tilt conditions in the four directions of front, back, left and right can be verified. In addition to tripping limit and performance test verification, the fixture can also be used with temperature rise test bench, residual current test bench, short circuit test bench, etc. to complete temperature rise test verification, residual current test verification, short circuit test verification, etc. under tilt conditions.

[0025] 2. Swing test (1) First, fix the circuit breaker on the front and rear moving vertical plates. The swing period range is 0~10s. Five typical swing periods such as 2s, 4s, 6s, 8s, and 10s can be selected for testing. The swing period can be set by adjusting the speed of the traction motor. Any swing period can be set according to the test requirements. The swing angle range is -45°~45°. A typical angle of 22.5° can be selected for testing. Any or several swing angles can also be set according to the test requirements. Under each combination of swing period and angle, the circuit breaker is supplied with 1.3 times, 2 times, and 2.5 times the rated current in conjunction with the circuit breaker tripping test bench. The tripping time of the thermomagnetic trip device under overload conditions is recorded, and it is verified whether maloperation will occur when the current is less than the rated current. (2) Then fix the circuit breaker on the left and right moving vertical plates and repeat the above test steps.

[0026] (3) After the tests in steps (1) and (2), the tripping limit and characteristic tests of the circuit breaker under the swing conditions in the four directions of front, back, left and right can be completed. In addition to tripping limit and performance test verification, the device can also be used with temperature rise test bench, residual current test bench, short circuit test bench, etc. to complete temperature rise test verification, residual current test verification, short circuit test verification, etc. under the tilt condition.

[0027] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A test fixture for tilting and swaying of marine low-pressure components, characterized in that: Includes inclined support unit, motion unit and traction unit; The inclined support unit includes a base plate (8) and four longitudinal support legs (11) fixedly installed on the base plate (8). Two horizontal fixing grooves (10) are arranged horizontally and parallel above the four longitudinal support legs (11). Two motion unit positioning beams (13) are arranged at intervals between the horizontal fixing grooves (10). Rotary shaft mounting plates (12) are symmetrically arranged on both sides of the base plate (8). The motion unit is rotatably connected between the rotating shaft mounting plates (12) through a rotating shaft (15). The inclined support unit provides support for the tilting and swaying of the motion unit. The motion unit is an L-shaped motion plate, which includes front and rear motion vertical plates (1) and left and right motion vertical plates (2). The front and rear motion vertical plates (1) and the left and right motion vertical plates (2) are all equipped with longitudinal mounting rails (16) and transverse mounting rails (17) arranged in a grid pattern. Low-voltage components are installed on the longitudinal mounting rails (16) and transverse mounting rails (17). The motion unit tilts and swings under the drive of the traction unit. The traction unit includes a traction motor (3), a traction plate (18), a traction hole (5), a traction rope (4), a counterweight (7), and a fixed pulley (19). The traction motor (3) is fixedly installed at the front end of the base plate (8). The traction plate (18) is fixedly installed at the top of the front and rear moving vertical plate (1). The fixed pulley (19) is installed at the end of the inclined support unit through the end of the T-shaped beam (6) that extends laterally. The motor shaft end of the traction motor (3) is connected to the traction rope (4). The rear end of the traction rope (4) passes through the traction hole (5) and the fixed pulley (19) and is connected to the counterweight (7).

2. The marine low-pressure component tilting and swaying test fixture according to claim 1, characterized in that: The motion unit positioning beam (13) is slidably installed in the transverse fixing groove (10) and fixed with bolts. A magnetic protractor (14) is installed on the left and right motion vertical plates (2) to control the tilt angle of the L-shaped motion plate.

3. The marine low-pressure component tilting and swaying test fixture according to claim 1, characterized in that: The bottom of the base plate (8) is fixedly installed with casters (9) on both sides.

4. The marine low-pressure component tilting and swaying test fixture according to claim 1, characterized in that: The tilt angle of the motion unit is -45° to 45°.

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