Simulated rainfall device applied to isolation switch freezing condition test

Abstract

The utility model relates to a rainfall simulation device applied to an isolating switch freezing condition test. The rainfall simulation device comprises a frame for accommodating a test object, a plurality of nozzles for spraying water to the inner space of the frame, a conveying pipeline for supplying water to the nozzles, and a water supply control mechanism for controlling water spraying conditions, the framework is a square integral framework, the conveying pipeline is fixed above the framework in a surrounding manner, at least four spray heads are fixed on the conveying pipeline, the spray heads are mounted on the conveying pipeline at equal intervals, and the inclination angles of the spray heads face the central area of the framework. The device is designed according to the requirements of the standard GB / T1985-2024, the overall structure is simple, the device is conveniently matched with an environment test box for use, the rainfall environment is simulated in an adjustable covering type spraying mode, the water spraying duration, the water temperature, the spraying speed and the spraying amount are controllably designed to meet the requirements of the test standard, the accuracy and the reliability of a test result are improved, and the test efficiency is improved. And the investment cost of laboratory equipment is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of test accessories and environmental condition simulation technology, specifically to a simulated rainfall device applied to the freezing condition test of disconnecting switches. Background Technology

[0002] Environmental testing is used to verify the environmental tolerance of products or equipment. The results of environmental testing are an important basis for judging product quality, workmanship, and performance. The traditional environmental testing method for electrical equipment is to place the product in an environmental test chamber to assess whether the electrical equipment can operate normally under relevant extreme environments. Typical environmental reliability laboratories can cover most of the relevant conditions such as alternating damp heat, constant damp heat, and high and low temperature tests. However, if outdoor electrical equipment encounters special conditions such as low temperature weather accompanied by rainfall causing ice to form on the equipment surface, the formation of ice may lead to equipment failure and affect the operation of the entire power system. According to the standard GB / T1985-2023, it is necessary to simulate rainfall and generate ice layers on the product. However, existing third-party testing laboratories generally do not have the relevant equipment specifically for this test. Utility Model Content

[0003] The technical problem this utility model aims to solve is how to overcome the above-mentioned defects of the prior art and provide a simulated rainfall device for testing freezing conditions of disconnect switches. It is designed according to the requirements of standard GB / T1985-2024, has a simple overall structure, is easy to use with environmental test chambers, and adopts an adjustable coverage spraying method to simulate precipitation environment. The spraying time, water temperature, spraying speed, and spray volume are controllable to meet the requirements of the test standard. This not only improves the accuracy and reliability of the test results, but also greatly reduces the investment cost of laboratory equipment.

[0004] This simulated rainfall device, used for testing freezing conditions of disconnect switches, includes a frame for containing the test sample, several nozzles for spraying water into the internal space of the frame, a delivery pipe for supplying water to the nozzles, and a water supply control mechanism for controlling the water spraying conditions. The frame is a square, integral frame. The delivery pipe is fixed around the top of the frame, and at least four nozzles are fixed on the delivery pipe. The nozzles are installed at equal intervals on the delivery pipe, with their tilt angles facing the central area of ​​the frame.

[0005] The optimized design includes a perforated permeable plate at the bottom of the frame, a liftable support frame for supporting the test specimen on the perforated permeable plate, and a water tank below the perforated permeable plate.

[0006] Furthermore, the nozzle is made of a plastic-coated metal flexible hose.

[0007] The optimized water supply control mechanism includes a PLC controller, a timer, a chiller, and a water pump. A temperature sensor is installed downstream of the chiller, and an opening valve is installed upstream of the water pump.

[0008] Furthermore, the timer is connected to the control input terminal of the PLC controller, the temperature sensor is connected to the signal input terminal of the PLC controller, and the control output terminal of the PLC controller is connected to the chiller, the opening valve, and the water pump, respectively. This utility model discloses a simulated rainfall device for testing freezing conditions of disconnecting switches. Designed according to the requirements of standard GB / T1985-2024, it features a simple overall structure, facilitating use with environmental test chambers. It employs an adjustable coverage spraying method to simulate precipitation, and the spraying duration, water temperature, spraying speed, and spray volume are controllable to meet the requirements of the test standards. This not only improves the accuracy and reliability of the test results but also significantly reduces the investment cost of laboratory equipment. Attached Figure Description

[0009] The following description, in conjunction with the accompanying drawings, further illustrates a simulated rainfall device for testing freezing conditions in disconnect switches according to this utility model:

[0010] Figure 1 This is a schematic diagram of the planar structure of the simulated rainfall device used in the freezing condition test of disconnecting switches;

[0011] Figure 2 This is a wireframe diagram illustrating the logic structure and connection principle of the water supply control mechanism used in the freezing condition test of the disconnector switch.

[0012] In the picture:

[0013] 1-Frame; 11-Perforated drainage board; 12-Liftable support frame; 13-Water tank;

[0014] 2- Nozzle;

[0015] 3-Transportation pipeline;

[0016] 4-Water supply control mechanism; 41-PLC controller; 42-Timer; 43-Refrigeration unit; 44-Water pump; 431-Temperature sensor; 441-Opening valve. Detailed Implementation

[0017] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] In the description of this utility model, it should be understood that the terms "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] The present invention will be further described below with specific embodiments, but the scope of protection of the present invention is not limited to the following embodiments.

[0020] Implementation method 1: such as Figure 1 As shown, the simulated rainfall device applied to the freezing condition test of disconnecting switches includes a frame 1 for containing the test sample, several nozzles 2 for spraying water into the internal space of the frame 1, a delivery pipe 3 for supplying water to the nozzles 2, and a water supply control mechanism 4 for controlling the water spraying conditions; wherein, the frame 1 is a square integral frame, the delivery pipe 3 is fixed around the top of the frame 1, at least four nozzles 2 are fixed on the delivery pipe 3, the nozzles 2 are installed at equal intervals on the delivery pipe 3, and the nozzles 2 are tilted towards the central area of ​​the frame 1.

[0021] Implementation Method 2: The simulated rainfall device applied to the freezing condition test of disconnecting switches has a perforated water-permeable plate 11 at its bottom frame 1. A liftable support frame 12 for supporting the test specimen is mounted on the perforated water-permeable plate 11, and a water tank 13 is located below the perforated water-permeable plate 11. The height of the liftable support frame can be adjusted according to the size of the test specimen, ensuring that the specimen is fully sprayed by the nozzles. The water falling through the perforated water-permeable plate is concentrated and seeps into the water tank. The nozzles 2 are made of plastic-coated metal flexible hoses, facilitating the overall design of the spray direction and individual adjustment of the spray direction. The remaining structures and components are as described in Implementation Method 1 and will not be repeated.

[0022] Implementation method 3: such as Figure 2As shown, the water supply control mechanism 4 of the simulated rainfall device applied to the freezing condition test of the disconnecting switch includes a PLC controller 41, a timer 42, a chiller 43, and a water pump 44. A temperature sensor 431 is installed downstream of the chiller 43, and an opening valve 441 is installed upstream of the water pump 44. The timer 42 is connected to the control input terminal of the PLC controller 41, the temperature sensor 431 is connected to the signal input terminal of the PLC controller 41, and the control output terminal of the PLC controller 41 is connected to the chiller 43, the opening valve 441, and the water pump 44, respectively. External water is supplied into the delivery pipeline sequentially through the chiller, temperature sensor, opening valve, and water pump. The timer is used to set the operating time of the entire water control mechanism. The PLC controller controls the spray temperature, spray volume, and spray start / stop through the chiller, opening valve, and water pump, and adjusts the chiller power according to the feedback signal from the temperature sensor. The remaining structures and components are as described in Embodiment 1 and will not be repeated.

[0023] Tests showed that by controlling the nozzle direction, spray flow rate, temperature, and running time, the tested product could achieve the ice thickness required by relevant standards, and its overall performance was good.

[0024] This simulated rainfall device, used for testing freezing conditions of disconnect switches, is designed according to the requirements of standard GB / T1985-2024. It has a simple overall structure, making it easy to use with environmental test chambers. It adopts an adjustable coverage spraying method to simulate precipitation environment, and the spraying time, water temperature, spraying speed, and spray volume are controllable to meet the requirements of the test standard. This not only improves the accuracy and reliability of the test results, but also greatly reduces the investment cost of laboratory equipment.

[0025] The above description illustrates the main features, basic principles, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments or examples described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments or examples should be considered exemplary and not restrictive. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A simulated rainfall device for testing freezing conditions of disconnecting switches, characterized in that: It includes a frame (1) for containing the sample, several nozzles (2) for spraying water into the interior space of the frame (1), a delivery pipe (3) for supplying water to the nozzles (2), and a water supply control mechanism (4) for controlling the water spraying conditions; wherein, The frame (1) is a square integral frame. The conveying pipe (3) is fixed around the top of the frame (1). At least four nozzles (2) are fixed on the conveying pipe (3). The nozzles (2) are installed at equal intervals on the conveying pipe (3). The nozzles (2) are tilted towards the central area of ​​the frame (1). The water supply control mechanism (4) includes a PLC controller (41), a timer (42), a chiller (43), and a water pump (44). A temperature sensor (431) is installed downstream of the chiller (43), and an opening valve (441) is installed upstream of the water pump (44). The timer (42) is connected to the control input terminal of the PLC controller (41), the temperature sensor (431) is connected to the signal input terminal of the PLC controller (41), and the control output terminal of the PLC controller (41) is connected to the chiller (43), the opening valve (441), and the water pump (44), respectively.

2. The simulated rainfall device for the isolation switch icing test according to claim 1, characterized in that: The frame (1) has a perforated permeable plate (11) at the bottom, and a liftable support frame (12) for supporting the test specimen is provided on the perforated permeable plate (11). A water pool (13) is provided below the perforated permeable plate (11).

3. The simulated rainfall device for testing freezing conditions of disconnecting switches according to claim 2, characterized in that: The nozzle (2) is made of plastic-coated metal hose.

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