Sandstorm environment erosion test method and system for composite insulating material

Abstract

The invention discloses a wind and sand environment erosion test method and system for a composite insulating material, and the method comprises the steps: selecting a to-be-tested composite insulating material sample, weighing the to-be-tested composite insulating material sample, and determining the initial weight of the to-be-tested composite insulating material sample; building a wind-sand erosion simulation test device; adjusting a sample bracket for mounting the to-be-tested composite insulating material sample according to a preset erosion wind speed and a preset erosion angle, so that a sand outlet of the sand wind erosion simulation sample device directly faces the center of the to-be-tested composite insulating material sample; carrying out an erosion test on the basis of the wind-sand erosion simulation test device, simulating wind-sand environments of different grades, and determining the weight of the composite insulating material sample to be tested after erosion after the test is finished; and calculating the wear mass and the wear rate of the to-be-tested composite insulating material sample based on the initial weight and the weight after erosion. According to the invention, independent test analysis of a plurality of environmental factors can be realized, and the influence of a single environmental variable on the performance of the composite insulating material is effectively detected.

Description

Technical Field

[0001] The invention relates to the technical field of wind and sand erosion and wear resistance testing of composite insulating materials, and more specifically, to a wind and sand environment erosion test method and system for composite insulating materials. Background Art

[0002] As a supporting transmission channel for large clean energy bases in deserts, Gobi and desert areas in western my country, UHV transmission lines will pass through areas prone to sandstorms. The composite external insulation materials in operation are subjected to long-term impacts of high-speed wind and sand flows, and may face surface wear, electrical performance and mechanical performance degradation, threatening the safe operation of transmission lines. For composite insulation materials, conducting wind and sand environment erosion tests on them is an important method to test their reliability; for the formulation or design of new insulation materials, conducting extreme wind and sand environment erosion tests before their application is a necessary method to test their application reliability. However, most transmission line operation sites do not have test conditions, and the test cycle required for testing in real environments is long. Therefore, it is of great significance to test the performance of composite materials after erosion through accelerated wind and sand simulation tests.

[0003] At present, there are few studies on the performance detection methods of composite external insulation materials after wind and sand erosion, and the research on the performance of materials after wind and sand erosion mainly focuses on insulators, conductors and hardware. For example, Chinese patent application CN107544006A discloses an experimental method for selecting transmission line insulators in a strong wind and sand environment with a large temperature difference, which provides a basis for the selection of transmission line insulators, but its strong wind environment only simulates the wind speed and particle size, and cannot achieve the control of sand and dust concentration and the incident angle of wind and sand flow, and cannot completely restore the real sand and dust environment; Chinese patent application CN107728017A discloses a method for detecting insulators operating in extreme climate environments, which detects the material properties of insulators in extreme environments, but its simulation of extreme environments is completed through a wind tunnel system laboratory, the experimental cost is high, and only the deformation, power frequency withstand voltage characteristics and roughness are tested, and there is a lack of accurate analysis of the hydrophobicity, mechanical properties, volume resistivity and surface resistivity of the material.

[0004] Therefore, a method and system for testing the erosion of composite insulating materials in a wind and sand environment is needed. Summary of the invention

[0005] The invention provides a wind and sand environment erosion test method and system for composite insulating materials, so as to solve the problem of how to efficiently detect the wind and sand erosion and wear resistance of composite insulating materials.

[0006] In order to solve the above problems, according to one aspect of the present invention, a sandstorm environment erosion test method for composite insulation materials is provided, the method comprising:

[0007] Selecting a sample of the composite insulating material to be tested, weighing it, and determining the initial weight of the sample of the composite insulating material to be tested;

[0008] Build a sand erosion simulation test device;

[0009] Adjusting the sample holder for mounting the composite insulating material sample to be tested according to the preset erosion wind speed and erosion angle so that the sand outlet of the wind and sand erosion simulation sample device faces the center of the composite insulating material sample to be tested;

[0010] Conducting an erosion test based on the wind and sand erosion simulation test device to simulate wind and sand environments of different levels, and after the test is completed, determining the eroded weight of the composite insulating material sample to be tested;

[0011] The wear mass and the wear rate of the composite insulating material sample to be tested are calculated based on the initial weight and the weight after erosion.

[0012] Preferably, the method further comprises:

[0013] Use sand collectors to collect dust from the deserted areas;

[0014] Among them, the sand collector is divided into three parts: upper, middle and lower. The upper part is a perforated shield, the middle part is a cylindrical hollow structure, the wall of the hollow structure is provided with ventilation holes with five openings, and the lower part is a prismatic sand collector. The upper half of the sand collector is provided with a sand collecting port, and the lower half is provided with a removable sand collecting box. After the wind and sand flow enters the sand collector, the sand particles are deposited and stored in the sand collecting box at the bottom, and the airflow flows out from the ventilation hole.

[0015] Preferably, the wind and sand erosion simulation test device comprises: an air pressure control module, a high-pressure sandblasting module and an erosion wear module connected in sequence; wherein,

[0016] The air pressure control module is used to simulate a strong wind environment to form a wind and sand erosion environment based on the high-pressure sandblasting module;

[0017] The high-pressure sandblasting module is used to control the flow rate of simulated wind and sand;

[0018] The erosion and wear module is used to output wind and sand to simulate wind and sand erosion of the target composite insulating material sample.

[0019] Preferably, the air pressure control module comprises an air compressor and an air storage tank, wherein the air compressor compresses the air and then introduces the air into the air storage tank to provide air source power.

[0020] Preferably, the high-pressure sandblasting module comprises: a high-pressure air pump, a pressure regulating valve, a pressure gauge, a blower and a sand storage box connected in sequence;

[0021] Among them, after the sand outlet valve of the sand storage box is opened, the sand enters the sand inlet of the fan from the sand storage box, and the sand flow is controlled by adjusting the fan frequency.

[0022] Preferably, the erosion and wear module comprises: a nozzle and the sample holder; wherein,

[0023] The nozzle is connected to the sand outlet of the fan;

[0024] The sample support comprises: a door-shaped support and a clamp; the support is provided with an angle adjustment device and a fixing device to adjust the windward angle of the surface of the composite insulating material sample to be tested between 0 and 90 degrees.

[0025] Preferably, the method further comprises:

[0026] After the erosion test is completed, an ultrasonic cleaning device is used to remove sand on the surface of the composite insulating material sample to be tested, and then the composite insulating material sample to be tested is weighed to determine the weight after erosion.

[0027] According to another aspect of the present invention, a wind and sand environment erosion test system for composite insulation materials is provided, the system comprising:

[0028] A sample selection unit is used to select a sample of the composite insulating material to be tested, and weigh it to determine the initial weight of the sample of the composite insulating material to be tested;

[0029] Test device construction unit, used to build a wind and sand erosion simulation test device;

[0030] An adjustment unit, used for adjusting the sample holder for mounting the composite insulating material sample to be tested according to a preset erosion wind speed and erosion angle, so that the sand outlet of the wind and sand erosion simulation sample device faces the center of the composite insulating material sample to be tested;

[0031] An erosion test unit, used to perform an erosion test based on the wind and sand erosion simulation test device, simulate wind and sand environments of different levels, and determine the post-erosion weight of the composite insulating material sample to be tested after the test is completed;

[0032] The wear data calculation unit is used to calculate the wear mass and wear rate of the composite insulating material sample to be tested based on the initial weight and the weight after erosion.

[0033] Preferably, the system further comprises:

[0034] A sand collecting unit, used to collect sand and dust from the deserted area using a sand collector;

[0035] Among them, the sand collector is divided into three parts: upper, middle and lower. The upper part is a perforated shield, the middle part is a cylindrical hollow structure, the wall of the hollow structure is provided with ventilation holes with five openings, and the lower part is a prismatic sand collector. The upper half of the sand collector is provided with a sand collecting port, and the lower half is provided with a removable sand collecting box. After the wind and sand flow enters the sand collector, the sand particles are deposited and stored in the sand collecting box at the bottom, and the airflow flows out from the ventilation hole.

[0036] Preferably, the wind and sand erosion simulation test device comprises: an air pressure control module, a high-pressure sandblasting module and an erosion wear module connected in sequence; wherein,

[0037] The air pressure control module is used to simulate a strong wind environment to form a wind and sand erosion environment based on the high-pressure sandblasting module;

[0038] The high-pressure sandblasting module is used to control the flow rate of simulated wind and sand;

[0039] The erosion and wear module is used to output wind and sand to simulate wind and sand erosion of the target composite insulating material sample.

[0040] Preferably, the air pressure control module comprises an air compressor and an air storage tank, wherein the air compressor compresses the air and then introduces it into the air storage tank to provide air source power.

[0041] Preferably, the high-pressure sandblasting module comprises: a high-pressure air pump, a pressure regulating valve, a pressure gauge, a blower and a sand storage box connected in sequence;

[0042] Among them, after the sand outlet valve of the sand storage box is opened, the sand enters the sand inlet of the fan from the sand storage box, and the sand flow is controlled by adjusting the fan frequency.

[0043] Preferably, the erosion and wear module comprises: a nozzle and the sample holder; wherein,

[0044] The nozzle is connected to the sand outlet of the fan;

[0045] The sample support comprises: a door-shaped support and a clamp; the support is provided with an angle adjustment device and a fixing device to adjust the windward angle of the surface of the composite insulating material sample to be tested between 0 and 90 degrees.

[0046] Preferably, the system further comprises:

[0047] The cleaning unit is used to use an ultrasonic cleaning device to remove sand on the surface of the composite insulating material sample to be tested after the erosion test is completed, and then weigh the composite insulating material sample to be tested to determine the weight after erosion.

[0048] The present invention provides a wind and sand environment erosion test method and system for composite insulating materials, including: selecting a composite insulating material to be tested, and weighing it to determine the initial weight of the composite insulating material sample to be tested; building a wind and sand erosion simulation test device; adjusting the sample bracket for installing the composite insulating material sample to be tested according to the preset erosion wind speed and erosion angle, so that the sand outlet of the wind and sand erosion simulation sample device is directly opposite to the center of the composite insulating material sample to be tested; performing an erosion test based on the wind and sand erosion simulation test device to simulate different levels of wind and sand environments, and after the test, determining the weight of the composite insulating material sample to be tested after erosion; calculating the wear mass and wear rate of the composite insulating material sample to be tested based on the initial weight and the weight after erosion. The present invention can realize large-scale and precise control of wind speed through an air pressure control module, and can realize independent control of wind speed and sand flow respectively, can realize independent test analysis of multiple environmental factors, and effectively detect the influence of a single environmental variable on the performance of composite insulating materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0050] Figure 1 It is a flow chart of a sandstorm environment erosion test method 100 for a composite insulating material according to an embodiment of the present invention;

[0051] Figure 2 A schematic diagram of a high-pressure sandblasting module and an erosion wear module according to an embodiment of the present invention;

[0052] Figure 3 A schematic diagram of a sand collector according to an embodiment of the present invention;

[0053] Figure 4 Schematic diagram of the structure of a wind and sand environment erosion test system 400 for composite insulating materials according to an embodiment of the present invention. DETAILED DESCRIPTION

[0054] Now, exemplary embodiments of the present invention are described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0055] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0056] Figure 1 FIG. 1 is a flow chart of a sandstorm environment erosion test method 100 for composite insulation materials according to an embodiment of the present invention. Figure 1 As shown, the wind and sand environment erosion test method for composite insulating materials provided by the embodiment of the present invention can realize accurate control of wind speed over a wide range through the air pressure control module, and can realize independent control of wind speed and sand flow respectively, can realize independent test analysis of multiple environmental factors, and effectively detect the influence of a single environmental variable on the performance of composite insulating materials. The wind and sand environment erosion test method 100 for composite insulating materials provided by the embodiment of the present invention starts from step 101. In step 101, a sample of the composite insulating material to be tested is selected and weighed to determine the initial weight of the sample of the composite insulating material to be tested.

[0057] In step 102, a wind and sand erosion simulation test device is constructed.

[0058] In step 103, a sample holder for mounting the composite insulating material sample to be tested is adjusted according to a preset erosion wind speed and erosion angle, so that the sand outlet of the wind and sand erosion simulation sample device faces the center of the composite insulating material sample to be tested.

[0059] In step 104, an erosion test is performed based on the wind and sand erosion simulation test device to simulate wind and sand environments of different levels, and after the test is completed, the post-erosion weight of the composite insulating material sample to be tested is determined.

[0060] In step 105, the wear mass and the wear rate of the composite insulating material sample to be tested are calculated based on the initial weight and the weight after erosion.

[0061] Preferably, the method further comprises:

[0062] Use sand collectors to collect dust from the deserted areas;

[0063] Among them, the sand collector is divided into three parts: upper, middle and lower. The upper part is a perforated shield, the middle part is a cylindrical hollow structure, the wall of the hollow structure is provided with ventilation holes with five openings, and the lower part is a prismatic sand collector. The upper half of the sand collector is provided with a sand collecting port, and the lower half is provided with a removable sand collecting box. After the wind and sand flow enters the sand collector, the sand particles are deposited and stored in the sand collecting box at the bottom, and the airflow flows out from the ventilation hole.

[0064] Preferably, the wind and sand erosion simulation test device comprises: an air pressure control module, a high-pressure sandblasting module and an erosion wear module connected in sequence; wherein,

[0065] The air pressure control module is used to simulate a strong wind environment to form a wind and sand erosion environment based on the high-pressure sandblasting module;

[0066] The high-pressure sandblasting module is used to control the flow rate of simulated wind and sand;

[0067] The erosion and wear module is used to output wind and sand to simulate wind and sand erosion of the target composite insulating material sample.

[0068] Preferably, the air pressure control module comprises an air compressor and an air storage tank, wherein the air compressor compresses the air and then introduces it into the air storage tank to provide air source power.

[0069] Preferably, the high-pressure sandblasting module comprises: a high-pressure air pump, a pressure regulating valve, a pressure gauge, a blower and a sand storage box connected in sequence;

[0070] Among them, after the sand outlet valve of the sand storage box is opened, the sand enters the sand inlet of the fan from the sand storage box, and the sand flow is controlled by adjusting the fan frequency.

[0071] Preferably, the erosion and wear module comprises: a nozzle and the sample holder; wherein,

[0072] The nozzle is connected to the sand outlet of the fan;

[0073] The sample support comprises: a door-shaped support and a clamp; the support is provided with an angle adjustment device and a fixing device to adjust the windward angle of the surface of the composite insulating material sample to be tested between 0 and 90 degrees.

[0074] Preferably, the method further comprises:

[0075] After the erosion test is completed, an ultrasonic cleaning device is used to remove sand on the surface of the composite insulating material sample to be tested, and then the composite insulating material sample to be tested is weighed to determine the weight after erosion.

[0076] In the present invention, a wind and sand erosion mode test is carried out based on a wind and sand erosion simulation test device. The wind and sand erosion simulation test device includes an air pressure control module, a high-pressure sandblasting module and an erosion and wear module. Among them, the air pressure control module realizes the adjustment of the simulated wind speed. The high-pressure sandblasting module can realize the control of the sand flow rate. The erosion and wear module can realize the adjustment of parameters such as the windward angle of the composite material and the distance between the specimen and the nozzle. The air pressure control module is connected to the high-pressure sandblasting module to form a high-speed sand-containing airflow environment, and the sample holder is arranged relative to the nozzle.

[0077] Furthermore, the air pressure control module is composed of an air compressor and an air storage tank. The air compressor compresses the air and then introduces it into the air storage tank to provide air source power.

[0078] Furthermore, the air pressure control module can adjust the simulated wind speed by adjusting the air pressure, and the air pressure is adjustable from 0 to 0.8 MPa.

[0079] Combination Figure 2 As shown, in the present invention, the high-pressure sandblasting module is composed of a high-pressure air pump, a pressure gauge, a sand storage box and a fan. The erosion and wear module is composed of a nozzle and a sample holder, the holder is composed of a door-shaped holder and a fixture, and the nozzle diameter is 30-50 mm.

[0080] Furthermore, after the sand outlet valve of the high-pressure sand blasting module is opened, sand enters the sand inlet of the fan from the sand storage box. The sand storage box can store sand samples with a volume of 20-30 cubic meters.

[0081] Furthermore, the high-pressure sandblasting module can control the sand flow rate by adjusting the fan frequency, and the speed at which the gas carries the sand particles is uniform and controllable.

[0082] Furthermore, the distance between the erosion and wear module nozzle and the sample surface is adjustable from 0 to 200 cm.

[0083] Furthermore, the bracket of the erosion and wear module is provided with an angle adjustment device and a fixing device, which can adjust the windward angle of the sample surface between 0-90 degrees.

[0084] Furthermore, the erosion and wear module can adjust parameters such as the windward angle of the composite material and the distance between the specimen and the nozzle. Sand is sprayed from the nozzle, and the specimen is fixed by the bracket and eroded by the wind and sand flow sprayed from the nozzle. The entire erosion process can be directly observed.

[0085] In the present invention, the steps of conducting a wind-sand erosion mode test based on a wind-sand erosion simulation test device include:

[0086] Step 1: Collect sand and dust from the Shagohuang area, select the experimental sample of the silicone rubber material to be eroded, weigh it, and record its mass as G1.

[0087] Step 2: Build a wind and sand erosion simulation experimental device.

[0088] Step 3: Adjust the sample holder according to the predetermined erosion wind speed and erosion angle, install the prepared sample on the holder, and adjust the position of the holder so that the sand outlet of the device faces the center of the sample.

[0089] Step 4: Start the erosion test device to simulate different levels of extreme wind and sand environments, start the timing device, and close the erosion test device after the test time is over. Remove the specimen, use an ultrasonic cleaning device to remove sand from the surface of the specimen, weigh the specimen mass G2 after drying, and calculate the specimen wear mass ΔG and wear rate W.

[0090] Furthermore, the self-made sand collector is used to collect sand samples from sampling points in the Shagohuang area, and coarse particles larger than 0.5 mm are screened out.

[0091] In the present invention, sand is collected based on a self-designed sand collector. Figure 3 As shown, the sand collector is divided into three parts: upper, middle and lower. The upper part is a perforated shield 1, the middle part is a cylindrical hollow structure, and the wall of the hollow structure is provided with a vent 2 with five openings. The lower part is a prismatic sand collector, and the upper part of the sand collector is provided with a sand collecting port 3, and the lower part is provided with a sand collecting box 4 that can be pulled out. After the wind and sand flow enters the sand collector, the sand is deposited and stored in the bottom sand collecting box, and the airflow flows out from the vent. The sand collector is about 15cm high, 22cm long and 22cm wide. The sand collector has five openings, which is convenient for collecting sand and dust from multiple directions. The sand inlet is about 12cm long and 6cm high, and there is a perforated shield on it. After the wind and sand flow enters the sand collector, the sand is deposited and stored in the bottom sand collecting box, and the airflow flows out from the vent. When collecting sand and dust samples, the sand collecting box at the bottom of the sand collector is pulled out.

[0092] In the present invention, dust sampling points in the Shagohuang area are determined, and in combination with the frequency pattern of sandstorms in the Shagohuang area, areas where sandstorms frequently occur and where high-voltage transmission lines pass are selected as sampling points; the installation position of the sand collector is determined, and according to the strong wind and sand meteorological standards, the tower structure, the dust particle size and the influence of the installation position of the solar panel on the tower are considered to determine the installation height of the gradient sand collector; based on the basic meteorological observation data of the Xinjiang Uygur Autonomous Region given by the National Meteorological Science Data Center, the installation orientation is determined according to the actual incoming flow direction, so that the sand collector faces the main incoming flow direction and is installed at a position where the tower is less blocked, so that sand samples are collected from multiple directions, thereby improving the sand sample collection efficiency.

[0093] Furthermore, the test bracket can adjust the erosion angle. The sample bracket is adjusted according to the predetermined erosion angle, the sample is fixed on the bracket, and the distance and position between the nozzle and the bracket are adjusted to align the nozzle with the center position of the sample.

[0094] Furthermore, the erosion test device startup method includes: starting the air compressor and keeping the pressure at a fixed value, starting the motor, and opening the sand outlet valve.

[0095] Furthermore, the different levels of simulated extreme wind and sand environments are achieved through an erosion device, and the simulated environment includes: wind speed is adjustable in the range of 0 to 50 m / s, dust concentration is adjustable in the range of 0 to 3000 mg / m3, the sand box stores three different particle sizes of dust: 0 to 125 μm, 125 to 250 μm, and 250 to 500 μm, and the impact angles of wind and sand flow are 15°, 30°, 45°, 60°, and 90°.

[0096] Furthermore, the wind speed regulation is controlled by the pressure of the gas tank, the dust concentration is controlled by the motor frequency, and the wind direction angle is controlled by adjusting the clamping mode of the fixture.

[0097] Furthermore, after the test, the test piece is ultrasonically cleaned for at least 10 minutes, and the mass G2 of the test piece is weighed after drying, and the wear mass ΔG=G1-G2 and the wear rate W=ΔG / G1×100% of the test piece are calculated.

[0098] Compared with the prior art, the present invention has the following beneficial effects:

[0099] (1) The sand samples collected from the sampling points in the Shagohuang area were collected using a self-made sand collector, which can realize the real simulation of the complex sand and dust environment and effectively restore the actual operating conditions of the composite insulation.

[0100] (2) The sand flow rate is controlled by controlling the motor frequency, and then the concentration of the dust environment is controlled, which overcomes the problems of single erosion flow test conditions and uneven sand concentration distribution, and effectively realizes the simulation of complex dust environments.

[0101] (3) The air pressure control module can realize precise control of wind speed over a wide range, and can realize independent control of wind speed and sand flow respectively. The wind and sand erosion simulation test device for composite insulating materials under complex environments proposed by the present invention can realize independent test analysis of multiple environmental factors and effectively detect the influence of a single environmental variable on the performance of composite insulating materials.

[0102] The following is a specific example of the embodiment of the present invention.

[0103] In an embodiment of the present invention, a wind and sand erosion simulation device includes: an air pressure control module, a high-pressure sandblasting module and an erosion and wear module. The air pressure control module realizes the adjustment of the simulated wind speed. The high-pressure sandblasting module can realize the control of the sand flow rate. The erosion and wear module can realize the adjustment of parameters such as the windward angle of the composite material and the distance between the specimen and the nozzle. The air pressure control module is connected to the high-pressure sandblasting system to form a high-speed sand-containing airflow environment, and the sample holder is arranged opposite to the nozzle.

[0104] In this embodiment, the air pressure control module is composed of an air compressor and an air tank. The air compressor compresses the air and then introduces it into the air tank to provide air source power. The air tank can hold 20m3 of air. The air pressure control module can adjust the simulated wind speed by adjusting the air pressure. The air pressure is adjustable from 0 to 0.8 MPa, so that the test wind speed is adjustable from 0 to 50 m / s.

[0105] In this embodiment, the high-pressure sandblasting module is composed of a high-pressure air pump, a pressure gauge, a sand storage box and a fan. After the sand outlet valve of the high-pressure sandblasting module is opened, the sand enters the sand inlet of the fan from the sand storage box. The sand storage box can store a volume of 20-30 cubic sand samples. The high-pressure sandblasting module can control the sand flow rate by adjusting the fan frequency, and the speed of the gas carrying the sand is uniform and adjustable.

[0106] In this embodiment, the erosion wear module is composed of a nozzle and a sample holder, the holder is composed of a gate-shaped holder and a clamp, the nozzle diameter is 30-50 mm, and the distance between the nozzle and the sample surface is adjustable from 0 to 200 cm.

[0107] In this embodiment, the bracket of the erosion and wear module is provided with an angle adjustment device and a fixing device, which can adjust parameters such as the windward angle of the composite material and the distance between the test piece and the nozzle. The windward angle is adjustable between 0-90 degrees.

[0108] In this embodiment, the sand particles of the erosion and wear module are sprayed out from the nozzle, and the test piece is fixed by the bracket and then eroded and worn by the wind and sand flow sprayed out from the nozzle. The whole erosion process can be directly observed.

[0109] In an embodiment of the present invention, a method for conducting a wind and sand erosion simulation experiment on a composite insulating material in a complex environment comprises the steps of:

[0110] Step 1: Collect dust from the Shagohuang area, select experimental samples of silicone rubber materials to be eroded and weigh them. For the preparation of samples to be eroded, this method selects composite silicone rubber test pieces produced by Xiangyang Insulator Factory as experimental samples. Before the experiment, the mass of the sample to be eroded is weighed after ultrasonic cleaning for 10 minutes and recorded as G1. The sample size is 150mm*120mm*2mm, numbered C1, and the abrasive used for erosion is the sand sample collected from the sand collector at the sampling point and sieved out, and coarse particles larger than 0.5mm are sieved out.

[0111] Step 2: Build a sand erosion simulation test device and check whether the air compressor, air tank, fan and other devices can work normally.

[0112] Step 3: Adjust the sample holder according to the predetermined erosion angle, fix the sample on the holder, adjust the distance and position between the nozzle and the holder to reach the expected determined value for each set of tests, and align the nozzle with the center of the sample; pour an appropriate amount of sand sample into the sand storage box to ensure that the wind and sand flow is uniform and stable during the test.

[0113] Step 4: Turn on the air compressor and keep the pressure at 0.25MPa, turn on the motor, open the sand outlet valve, turn on the timing device, adjust the fixture so that the incident angle of the wind and sand flow is 45°, and conduct the erosion test for 30 minutes; after the test time is over, close the sand outlet valve, turn off the motor, remove the specimen, ultrasonically clean the specimen for 10 minutes, weigh the specimen mass G2 after drying, and calculate the specimen wear mass ΔG=G1-G2, and the wear rate W=ΔG / G1×100%.

[0114] Figure 4 FIG. 4 is a schematic diagram of a wind and sand environment erosion test system 400 for composite insulation materials according to an embodiment of the present invention. Figure 4 As shown, a wind and sand environment erosion test system 400 for composite insulating materials provided in an embodiment of the present invention includes: a sample selection unit 401, a test device construction unit 402, an adjustment unit 403, an erosion test unit 404 and a wear data calculation unit 405.

[0115] Preferably, the sample selection unit 401 is used to select a sample of the composite insulating material to be tested, and weigh it to determine the initial weight of the sample of the composite insulating material to be tested.

[0116] Preferably, the test device construction unit 402 is used to construct a wind and sand erosion simulation test device.

[0117] Preferably, the adjustment unit 403 is used to adjust the sample holder for mounting the composite insulating material sample to be tested according to preset erosion wind speed and erosion angle, so that the sand outlet of the wind and sand erosion simulation sample device faces the center of the composite insulating material sample to be tested.

[0118] Preferably, the erosion test unit 404 is used to perform an erosion test based on the wind and sand erosion simulation test device to simulate wind and sand environments of different levels, and after the test is completed, determine the post-erosion weight of the composite insulating material sample to be tested.

[0119] Preferably, the wear data calculation unit 405 is used to calculate the wear mass and wear rate of the composite insulating material sample to be tested based on the initial weight and the weight after erosion.

[0120] Preferably, the system further comprises:

[0121] A sand collecting unit, used to collect sand and dust from the deserted area using a sand collector;

[0122] Among them, the sand collector is divided into three parts: upper, middle and lower. The upper part is a perforated shield, the middle part is a cylindrical hollow structure, the wall of the hollow structure is provided with ventilation holes with five openings, and the lower part is a prismatic sand collector. The upper half of the sand collector is provided with a sand collecting port, and the lower half is provided with a removable sand collecting box. After the wind and sand flow enters the sand collector, the sand particles are deposited and stored in the sand collecting box at the bottom, and the airflow flows out from the ventilation hole.

[0123] Preferably, the wind and sand erosion simulation test device comprises: an air pressure control module, a high-pressure sandblasting module and an erosion wear module connected in sequence; wherein,

[0124] The air pressure control module is used to simulate a strong wind environment to form a wind and sand erosion environment based on the high-pressure sandblasting module;

[0125] The high-pressure sandblasting module is used to control the flow rate of simulated wind and sand;

[0126] The erosion and wear module is used to output wind and sand to simulate wind and sand erosion of the target composite insulating material sample.

[0127] Preferably, the air pressure control module comprises an air compressor and an air storage tank, wherein the air compressor compresses the air and then introduces the air into the air storage tank to provide air source power.

[0128] Preferably, the high-pressure sandblasting module comprises: a high-pressure air pump, a pressure regulating valve, a pressure gauge, a blower and a sand storage box connected in sequence;

[0129] Among them, after the sand outlet valve of the sand storage box is opened, the sand enters the sand inlet of the fan from the sand storage box, and the sand flow is controlled by adjusting the fan frequency.

[0130] Preferably, the erosion and wear module comprises: a nozzle and the sample holder; wherein,

[0131] The nozzle is connected to the sand outlet of the fan;

[0132] The sample support comprises: a door-shaped support and a clamp; the support is provided with an angle adjustment device and a fixing device to adjust the windward angle of the surface of the composite insulating material sample to be tested between 0 and 90 degrees.

[0133] Preferably, the system further comprises:

[0134] The cleaning unit is used to use an ultrasonic cleaning device to remove sand on the surface of the composite insulating material sample to be tested after the erosion test is completed, and then weigh the composite insulating material sample to be tested to determine the weight after erosion.

[0135] The wind and sand environment erosion test system 400 of the composite insulation material of the embodiment of the present invention corresponds to the wind and sand environment erosion test method 100 of the composite insulation material of another embodiment of the present invention, which will not be described in detail here.

[0136] The present invention has been described with reference to a few embodiments. However, it is known to those skilled in the art that other embodiments than the one disclosed above are equally within the scope of the present invention.

[0137] Generally, all terms used in the present invention are interpreted according to their ordinary meaning in the technical field, unless otherwise explicitly defined therein. All references to "a / said / the [device, component, etc.]" are open to interpretation as at least one instance of the device, component, etc., unless otherwise explicitly stated. The steps of any method disclosed herein do not necessarily have to be performed in the exact order disclosed, unless explicitly stated.

[0138] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0139] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0140] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0141] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A sandstorm erosion test method for composite insulating materials, characterized in that: The method comprises: Selecting a sample of the composite insulating material to be tested, weighing it, and determining the initial weight of the sample of the composite insulating material to be tested; Build a wind and sand erosion simulation test device; Adjusting the sample holder for mounting the composite insulating material sample to be tested according to the preset erosion wind speed and erosion angle so that the sand outlet of the wind and sand erosion simulation sample device faces the center of the composite insulating material sample to be tested; Conducting an erosion test based on the wind and sand erosion simulation test device to simulate wind and sand environments of different levels, and after the test is completed, determining the eroded weight of the composite insulating material sample to be tested; The wear mass and the wear rate of the composite insulating material sample to be tested are calculated based on the initial weight and the weight after erosion.

2. The method according to claim 1, characterized in that The method further comprises: Use sand collectors to collect dust from the deserted areas; Among them, the sand collector is divided into three parts: upper, middle and lower. The upper part is a perforated shield, the middle part is a cylindrical hollow structure, the wall of the hollow structure is provided with ventilation holes with five openings, and the lower part is a prismatic sand collector. The upper part of the sand collector is provided with a sand collecting port, and the lower part is provided with a removable sand collecting box. After the wind and sand flow enters the sand collector, the sand particles are deposited and stored in the sand collecting box at the bottom, and the airflow flows out from the ventilation hole.

3. The method according to claim 1, characterized in that The wind and sand erosion simulation test device comprises: an air pressure control module, a high-pressure sandblasting module and an erosion wear module connected in sequence; wherein, The air pressure control module is used to simulate a strong wind environment to form a wind and sand erosion environment based on the high-pressure sandblasting module; The high-pressure sandblasting module is used to control the flow rate of simulated wind and sand; The erosion and wear module is used to output wind and sand to simulate wind and sand erosion of the target composite insulating material sample.

4. The method according to claim 3, characterized in that The air pressure control module comprises an air compressor and an air storage tank. The air compressor compresses the air and then introduces it into the air storage tank to provide air source power.

5. The method according to claim 3, characterized in that: The high-pressure sandblasting module comprises: a high-pressure air pump, a pressure regulating valve, a pressure gauge, a blower and a sand storage box connected in sequence; Among them, after the sand outlet valve of the sand storage box is opened, the sand enters the sand inlet of the fan from the sand storage box, and the sand flow is controlled by adjusting the fan frequency.

6. The method according to claim 5, characterized in that The erosion and wear module comprises: a nozzle and the sample holder; wherein, The nozzle is connected to the sand outlet of the fan; The sample support comprises: a door-shaped support and a clamp; the support is provided with an angle adjustment device and a fixing device to adjust the windward angle of the surface of the composite insulating material sample to be tested between 0 and 90 degrees.

7. The method according to claim 1, characterized in that The method further comprises: After the erosion test is completed, an ultrasonic cleaning device is used to remove sand on the surface of the composite insulating material sample to be tested, and then the composite insulating material sample to be tested is weighed to determine the weight after erosion.

8. A wind and sand environment erosion test system for composite insulating materials, characterized in that: The system comprises: A sample selection unit is used to select a sample of the composite insulating material to be tested, and weigh it to determine the initial weight of the sample of the composite insulating material to be tested; Test device construction unit, used to build a wind and sand erosion simulation test device; An adjustment unit, used for adjusting the sample holder for mounting the composite insulating material sample to be tested according to a preset erosion wind speed and erosion angle, so that the sand outlet of the wind and sand erosion simulation sample device faces the center of the composite insulating material sample to be tested; An erosion test unit, used to perform an erosion test based on the wind and sand erosion simulation test device, simulate wind and sand environments of different levels, and determine the post-erosion weight of the composite insulating material sample to be tested after the test is completed; The wear data calculation unit is used to calculate the wear mass and wear rate of the composite insulating material sample to be tested based on the initial weight and the weight after erosion.

9. The system according to claim 8, characterized in that The system further comprises: A sand collecting unit, used to collect sand and dust from the deserted area using a sand collector; Among them, the sand collector is divided into three parts: upper, middle and lower. The upper part is a perforated shield, the middle part is a cylindrical hollow structure, the wall of the hollow structure is provided with ventilation holes with five openings, and the lower part is a prismatic sand collector. The upper half of the sand collector is provided with a sand collecting port, and the lower half is provided with a removable sand collecting box. After the wind and sand flow enters the sand collector, the sand particles are deposited and stored in the sand collecting box at the bottom, and the airflow flows out from the ventilation hole.

10. The system according to claim 8, characterized in that The wind and sand erosion simulation test device comprises: an air pressure control module, a high-pressure sandblasting module and an erosion wear module connected in sequence; wherein, The air pressure control module is used to simulate a strong wind environment to form a wind and sand erosion environment based on the high-pressure sandblasting module; The high-pressure sandblasting module is used to control the flow rate of simulated wind and sand; The erosion and wear module is used to output wind and sand to simulate wind and sand erosion of the target composite insulating material sample.

11. The system according to claim 10, characterized in that The air pressure control module comprises an air compressor and an air storage tank. The air compressor compresses the air and then introduces it into the air storage tank to provide air source power.

12. The system according to claim 10, characterized in that The high-pressure sandblasting module comprises: a high-pressure air pump, a pressure regulating valve, a pressure gauge, a blower and a sand storage box connected in sequence; Among them, after the sand outlet valve of the sand storage box is opened, the sand enters the sand inlet of the fan from the sand storage box, and the sand flow is controlled by adjusting the fan frequency.

13. The system according to claim 12, characterized in that The erosion and wear module comprises: a nozzle and the sample holder; wherein, The nozzle is connected to the sand outlet of the fan; The sample support comprises: a door-shaped support and a clamp; the support is provided with an angle adjustment device and a fixing device to adjust the windward angle of the surface of the composite insulating material sample to be tested between 0 and 90 degrees.

14. The system according to claim 8, characterized in that The system further comprises: The cleaning unit is used to use an ultrasonic cleaning device to remove sand on the surface of the composite insulating material sample to be tested after the erosion test is completed, and then weigh the composite insulating material sample to be tested to determine the weight after erosion.

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