Auxiliary device for measuring sound level of transformer

Abstract

The utility model discloses a transformer sound level measurement auxiliary device, which comprises a plurality of sound level probes used for acquiring sound signals of a transformer, and further comprises a probe bearing frame covering the periphery of the transformer, and the plurality of sound level probes are arranged along the circumferential direction of the probe bearing frame. The sound level probes are located on the same horizontal plane, and the distances from the sound level probes to the outer surface of the transformer are equal. According to the utility model, the problem of inconsistent measurement distances caused by positioning deviation in traditional manual measurement is effectively solved, and the accuracy and reliability of measurement data are ensured; secondly, the sound level meter does not need to be held manually or the position of the measuring head does not need to be adjusted frequently, the electric shock safety risk possibly faced by manual operation under the electrified working condition is greatly reduced, and the personal safety of operators is guaranteed; and multiple measuring points can be measured at the same time, so that the condition of long time consumption of a single test caused by manual switching measurement of multiple measuring points in the prior art is changed, and the detection efficiency is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of testing equipment, and in particular relates to an auxiliary device for sound level measurement. Background Technology

[0002] Transformer sound level testing is a crucial technical step in assessing the noise characteristics of operating equipment, and its measurement results directly affect whether the product meets national electromagnetic equipment noise limits. Accurate sound level testing is not only related to the environmental compliance of power equipment, but also an important technical means to ensure the acoustic environment quality around substations and monitor the mechanical condition of equipment.

[0003] The current measurement scheme uses an external power supply system to apply simulated load or no-load operation to the transformer, and collects sound signals by manually holding a sound level measuring device or fixing a wired probe on a temporary stand. In practice, multiple measurement points need to be preset on the surface of the test sample according to standard specifications, and the operator needs to repeatedly adjust the spatial position of the sound level meter to record data at multiple points.

[0004] The limitations of this traditional measurement method are becoming increasingly apparent: First, manually adjusting the handheld sound level meter or measuring head under energized conditions poses a risk of electric shock. Second, manual positioning leads to deviations in the measurement distance between each measuring point and the transformer body, resulting in poor consistency in the distance between the sound level probe and the test sample, affecting the overall data values. Furthermore, manual switching between multiple measuring points causes long testing times and low detection efficiency. Therefore, there is an urgent need for an auxiliary device for transformer sound level measurement that eliminates the need for close-range manual operation, ensures good consistency in the measurement distance between each measuring point and the transformer body, and allows for simultaneous measurement at multiple points. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the deficiencies and defects mentioned in the background art above, and to provide a transformer sound level measurement auxiliary device with high safety, accurate measurement data, and applicability to transformers of different models and sizes.

[0006] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is as follows:

[0007] A transformer sound level measurement auxiliary device includes multiple sound level probes for collecting sound signals from the transformer, and a probe support frame covering the outer periphery of the transformer. The multiple sound level probes are arranged circumferentially along the probe support frame, and each sound level probe is on the same horizontal plane and the distance from each sound level probe to the outer surface of the transformer is equal.

[0008] In the aforementioned transformer sound level measurement auxiliary device, preferably, the sound level probe is mounted on the rod of the probe support frame via a probe bracket, and the probe bracket is rotatably connected to the rod via a clamping member around the rod's axis. By rotating the probe bracket, the measurement distance between the sound level probe and the corresponding measuring point on the transformer's outer surface can be adjusted according to measurement requirements, making it suitable for transformers of different models and sizes. Simultaneously, the height of the sound level probe can be fine-tuned.

[0009] In the aforementioned transformer sound level measurement auxiliary device, preferably, the top of the probe support frame is equipped with a vertically extendable suspended telescopic frame, and the suspended telescopic frame, the probe support frame, and the transformer are coaxially arranged. Through the suspended telescopic frame, the probe support frame can be suspended directly above the transformer. According to the height of the transformer's measuring point, the suspended telescopic frame can be vertically extended or retracted, ensuring that the sound level probe mounted on the probe support frame is at the same horizontal plane as the corresponding measuring point on the transformer. This reduces measurement errors caused by height deviations, meets the measurement needs of transformers of various models and heights, and has a wide range of applications.

[0010] In the aforementioned transformer sound level measurement auxiliary device, preferably, the suspended telescopic frame includes a telescopic component capable of vertical extension and retraction, and a suspension base located at the upper end of the telescopic component, the suspension base being fixedly connected to the building roof. The fixed connection of the suspension base to the building roof provides stable suspension support for the entire probe support frame, ensuring the stability of the measuring device during vertical extension and retraction. The telescopic component can be flexibly adjusted in length, allowing the probe support frame to be precisely suspended directly above the transformer and adapting to the needs of measuring points at different heights, making operation convenient. Simultaneously, this structure only requires placing the transformer at the center point directly below the probe support frame to ensure the accuracy of the sound level probe measurement, while avoiding the swaying and positional deviation problems that may arise from traditional ground supports.

[0011] In the aforementioned transformer sound level measurement auxiliary device, preferably, the telescopic assembly includes multiple sets of vertically arranged cross arms and a lifting drive component for driving the cross arms to expand and retract to achieve telescopic movement. Each cross arm comprises multiple pairs of X-shaped hinged linkages. The use of multiple pairs of X-shaped hinged linkages in the cross arms forms a stable geometric structure, enabling the telescopic assembly to withstand large vertical loads, meeting the weight requirements of the suspended telescopic frame supporting the probe bearing frame and multiple sound level probes. Furthermore, it effectively distributes and bears the load during telescopic movement, ensuring the stability and reliability of the telescopic assembly during lifting and lowering. In addition, by incorporating the lifting drive component, manual intervention is reduced, improving measurement safety.

[0012] In the aforementioned transformer sound level measurement auxiliary device, preferably, several reinforcing crossbars are provided between the multiple sets of cross arms. By setting the reinforcing crossbars, a more integrated telescopic structure can be formed, effectively preventing local deformation of the telescopic component under stress, improving the rigidity and stability of the telescopic component, reducing probe position displacement caused by unstable telescopic movement, and improving the accuracy of sound level measurement.

[0013] In the aforementioned transformer sound level measurement auxiliary device, preferably, the probe support frame is a double-layer three-dimensional frame structure, including an upper ring frame fixedly connected to the lower end of the suspended telescopic frame, and a lower ring frame arranged parallel to it below. Multiple sound level probes are evenly spaced on the lower ring frame. This arrangement provides a stable support foundation by fixing the upper ring frame to the lower end of the suspended telescopic frame, while the lower ring frame has sufficient space to accommodate the sound level probes, allowing them to be evenly spaced to form a complete measurement ring. Furthermore, all sound level probes have greater space to rotate around the frame, facilitating flexible adjustment of the probe orientation according to the transformer specifications.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] This invention effectively solves the problem of inconsistent measurement distances caused by positioning deviations in traditional manual measurements, ensuring the accuracy and reliability of measurement data. Secondly, it eliminates the need for manual handheld sound level meters or frequent adjustments to the measuring head position, greatly reducing the risk of electric shock that may be encountered during manual operation under energized conditions and protecting the personal safety of operators. Furthermore, it enables simultaneous measurement at multiple points, changing the previous situation where manual switching between multiple measurement points resulted in long test times per test, greatly improving detection efficiency. Thus, it provides a more advanced, safe, and reliable auxiliary method for the accurate and efficient measurement of transformer sound levels. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional structural diagram of the transformer sound level measurement auxiliary device and the transformer as shown in the embodiment;

[0018] Figure 2 A three-dimensional structural schematic diagram of the transformer sound level measurement auxiliary device for an embodiment;

[0019] Figure 3A front view of the transformer sound level measurement auxiliary device and the transformer, as shown in the embodiment;

[0020] Figure 4 The left view of the transformer sound level measurement auxiliary device and the transformer is shown in the embodiment.

[0021] Legend

[0022] 1. Transformer; 2. Sound level probe; 3. Probe support frame; 31. Upper ring frame; 32. Lower ring frame; 4. Probe bracket; 41. Clamping component; 5. Suspended telescopic frame; 51. Telescopic assembly; 511. Cross arm; 512. Reinforcing crossbar; 52. Suspension base. Detailed Implementation

[0023] To facilitate understanding of this utility model, it will be described more comprehensively and in detail below with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0024] It should be noted that when a component is described as being "fixed to, attached to, connected to or connected to" another component, it can be directly fixed to, attached to, connected to or connected to the other component, or it can be indirectly fixed to, attached to, connected to or connected to the other component through other intermediate connectors.

[0025] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of protection of this invention.

[0026] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0027] Example:

[0028] like Figures 1 to 4 As shown, the transformer sound level measurement auxiliary device of this embodiment includes ten sound level probes 2 for collecting sound signals from the transformer 1, and also includes a probe support frame 3 covering the outer periphery of the transformer 1. The ten sound level probes 2 are arranged circumferentially along the probe support frame 3, and each sound level probe 2 is on the same horizontal plane and the distance from each sound level probe 2 to the outer surface of the transformer 1 is equal.

[0029] In this embodiment, the transformer 1 is a cuboid structure, and the probe support frame 3 is a double-layer three-dimensional rectangular frame structure, including an upper ring frame 31 fixed to the lower end of the suspended telescopic frame 5, and a lower ring frame 32 arranged parallel below it. Ten sound level probes 2 are evenly spaced on the lower ring frame 32. Each rod of the lower ring frame 32 is provided with three sound level probes 2 spaced apart on the long side and two sound level probes 2 spaced apart on the short side according to the detection requirements. The upper ring frame 31 is provided with reinforcing connectors to ensure a stable coaxial connection with the suspended telescopic frame 5.

[0030] In this embodiment, the sound level probe 2 is mounted on the rod of the probe support frame 3 via a probe bracket 4. The probe bracket 4 is connected to the rod and can rotate 360 ​​degrees around the rod axis via a clamping member 41. The probe bracket 4 can be made of flexible material. The sound level probe 2 and the fiber optic cable connected to it are fixed on the probe bracket 4. The position of the sound level probe 2 on the rod and the rotation angle of the probe bracket 4 can be adjusted via the clamping member 41.

[0031] In this embodiment, the top of the probe support frame 3 is provided with a vertically retractable suspended telescopic frame 5, and the suspended telescopic frame 5, the probe support frame 3, and the transformer 1 are coaxially arranged. The transformer 1 is located directly below the probe support frame 3.

[0032] In this embodiment, the suspended telescopic frame 5 includes a telescopic component 51 capable of vertical telescopic extension and a suspension base 52 located at the upper end of the telescopic component 51, and the suspension base 52 is fixedly connected to the roof of the building.

[0033] In this embodiment, the telescopic assembly 51 includes two sets of vertically arranged cross arms 511, and a lifting drive for driving the cross arms 511 to extend and retract to achieve telescopic movement. The cross arms 511 include six pairs of connecting rods that are hinged together in an X-shape. The lifting drive can be a lifting hoist.

[0034] In this embodiment, several reinforcing crossbars 512 are provided between multiple sets of cross arms 511.

[0035] In other embodiments, the shape of the probe support frame 3 can be set according to the shape of the transformer 1 and the measurement requirements, and the number of the sound level probe 2, the cross arm 511, and the connecting rod can be adaptively set according to the actual measurement requirements.

[0036] In this embodiment, the specific operating steps are as follows: the device is set in the testing chamber, the suspension base 52 is fixed to the top surface of the center of the testing chamber, the transformer 1 to be measured is placed directly below the entire device, the probe support frame 3 is moved vertically downward to cover the transformer 1 by adjusting the telescopic component 51, the measurement distance between the sound level probe 2 and the corresponding measuring point on the outer surface of the transformer 1 is adjusted by rotating the probe bracket 4 according to the measurement requirements, and the sound level probe 2 and the corresponding measuring point on the outer surface of the transformer 1 are made to be on the same horizontal plane. After all the positions of the sound level probe 2 meet the measurement requirements, the sound level test is started.

[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An auxiliary device for measuring sound level of a transformer, comprising a plurality of sound level probes (2) for collecting sound signals of a transformer (1), characterized in that, It also includes a probe support frame (3) covering the outer periphery of the transformer (1), and multiple sound level probes (2) are arranged circumferentially along the probe support frame (3). Each sound level probe (2) is on the same horizontal plane and the distance from each sound level probe (2) to the outer surface of the transformer (1) is equal.

2. The transformer sound level measurement aid of claim 1, wherein, The sound level probe (2) is mounted on the rod of the probe support frame (3) via a probe bracket (4). The probe bracket (4) is connected to the rod via a clamp (41) that can rotate around the axis of the rod.

3. The transformer sound level measurement aid of any of claims 1-2, wherein, The top of the probe support frame (3) is provided with a vertically extendable suspended telescopic frame (5), and the suspended telescopic frame (5), the probe support frame (3) and the transformer (1) are coaxially arranged.

4. The transformer sound level measurement aid of claim 3, wherein, The suspended telescopic frame (5) includes a telescopic component (51) capable of vertical telescopic extension and a suspension base (52) located at the upper end of the telescopic component (51), and the suspension base (52) is fixedly connected to the roof of the building.

5. The transformer sound level measurement aid of claim 4, wherein, The telescopic assembly (51) includes multiple sets of vertically arranged cross arms (511) and a lifting drive for driving the cross arms (511) to expand and retract to achieve telescopic movement. The cross arms (511) include multiple pairs of connecting rods that are hinged together in an X-shape.

6. The transformer sound level measurement aid of claim 5, wherein, Several reinforcing crossbars (512) are provided between the multiple sets of cross arms (511).

7. The transformer sound level measurement aid of claim 3, wherein, The probe support frame (3) is a double-layer three-dimensional frame structure, including an upper ring frame (31) fixed to the lower end of the suspended telescopic frame (5) and a lower ring frame (32) arranged in parallel below it. Multiple sound level probes (2) are evenly spaced on the lower ring frame (32).

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