CN219625311U - Aging test system for alternating-current metal closed switch equipment and control equipment - Google Patents

Abstract

The utility model relates to an aging test system of alternating-current metal closed switch equipment and control equipment, which comprises a test box, a test sample test station arranged in the test box, and a power supply mechanism connected to the test sample test station, wherein the test box is internally provided with a circumferentially encircling steam heating pipeline, a plurality of groups of heating resistance wires arranged on the inner side of the steam heating pipeline, a cold air inlet pipe communicated with the test box and temperature and humidity sensors arranged in all areas of the test box; the test box is provided with a steam boiler, an air cooler and a PLC programmable controller. The system is simple and convenient to operate and high in reliability, the mechanisms for heating and controlling the humidity of the system are relatively independent, the controllable change rate of the temperature and the humidity is improved, the implementation mode is more reasonable and reliable, and the programmable controller carries out feedback control with higher degree of automation on electric heating and air cooling temperature control equipment through sensor signals, so that the workload of personnel for operation and duty is effectively reduced.

Description

Aging test system for alternating-current metal closed switch equipment and control equipment

Technical Field

The utility model relates to the field of electrical appliance detection test equipment, in particular to an aging test system for alternating-current metal closed switch equipment and control equipment under severe weather conditions.

Background

Indoor ac metal enclosed switchgear and control devices installed in a building or room are generally protected from outdoor weather conditions, but may be subject to condensation due to rapid changes in temperature and contamination of the environment within the building. Therefore, in annex E of GB/T3906-2020, clear description and requirements are made for the use conditions and design classification of the metal-enclosed switchgear and the control equipment, wherein the classification and characteristics of the use conditions of condensation and pollution around the metal-enclosed switchgear and the control equipment are as follows: c0: condensation generally does not occur (no more than twice a year); CL: condensation is infrequent (no more than twice a month); CH: condensation is frequent (more than twice a month); PL: light pollution; PH: severe contamination (any number exceeding PL). Considering that the apparatus is particularly subjected to the combined action of humidity and pollution, the severity level of the three conditions of use is defined as follows, level 0: c0 PL; stage 1: CL PL or C0 PH;2 stages: CL PH or CH PL or CH PH. According to the classification conditions and the definition of the severity level, the standard classifies the test procedures into two kinds of ageing of grade 1 and grade 2, and the diagnosis procedure after the test is carried out on the tested products after the ageing cycle. The stage 1 burn-in differs from the stage 2 burn-in by the cycle period. A typical class 1 burn-in procedure is shown in FIG. 1.

The traditional ageing test system equipment adopts a hot air heating test box to manufacture ageing cycle test conditions, so that the equipment is high in overall cost, low in automation degree, large in operation workload, long in working hours for on duty condition observation, and low in temperature and humidity regulation change rate.

Disclosure of Invention

The utility model aims to solve the technical problems that: according to the ageing test program in the standard and the related requirements of test facilities, the defects of low temperature and humidity regulation efficiency and high personnel workload of the traditional ageing test system equipment are overcome, the ageing test system for the alternating-current metal closed switch equipment and the control equipment under severe climatic conditions is provided, the operation is simple and convenient, the reliability is high, the mechanisms for heating and controlling the humidity of the system are relatively independent, the controllable change rate of the temperature and the humidity is improved, the implementation mode is more reasonable and reliable, and the programmable controller carries out feedback control with higher automation degree on the electric heating and air cooling temperature control equipment through sensor signals, so that the workload of personnel for operation and duty is effectively reduced.

The aging test system of the alternating current metal closed switch equipment and the control equipment comprises a test box, a test sample test station arranged in the test box and a power supply mechanism connected to the test sample test station, wherein a circumferentially encircling steam heating pipeline, a plurality of groups of heating resistance wires arranged on the inner side of the steam heating pipeline, a cold air inlet pipe led into the test box and temperature and humidity sensors arranged in all areas in the test box are arranged in the test box; and a steam boiler, an air cooler and a PLC programmable controller are arranged outside the test box.

Further, the steam boiler is connected with the steam heating pipeline through a steam communicating pipe, an air outlet of the air cooler is connected to the cold air inlet pipe, the temperature and humidity sensor is connected to an input end of the PLC, and the heating resistance wire and the air cooler are respectively connected to output ends of the PLC.

Further, the power supply mechanism comprises a three-phase alternating current power supply, a power supply cable and an insulating pipe sleeve, wherein the power supply cable is installed on the wall of the test box and is connected with the output end of the three-phase alternating current power supply and the test station of the test sample through the insulating pipe sleeve.

Specifically, six groups of heating resistance wires are provided, and each group comprises three 10kW resistance wires.

Specifically, the steam boiler was equipped with three groups of 6kW heating rods, three groups of 9kW heating rods.

The aging test system for the alternating-current metal-enclosed switchgear and the control equipment overcomes the defects of low temperature and humidity regulation efficiency and large personnel workload of the traditional aging test system, is simple and convenient to operate and high in reliability, and the mechanisms for heating and controlling the humidity of the system are relatively independent, so that the controllable change rate of the temperature and the humidity is improved, the implementation mode is more reasonable and reliable, and the programmable controller performs feedback control with higher automation degree on the electric heating and air cooling temperature control equipment through sensor signals, so that the workload of personnel for operation and duty is effectively reduced.

Drawings

The aging test system of the alternating-current metal-enclosed switchgear and the control device of the utility model is further described below with reference to the accompanying drawings:

FIG. 1 is a test flow chart of a conventional level 1 burn-in test;

fig. 2 is a schematic plan view of the ac metal enclosed switchgear and control device.

In the figure:

the device comprises a 1-test box, a 2-sample test station, a 3-power supply mechanism, a 4-steam heating pipeline, a 5-heating resistance wire, a 6-cold air inlet pipe, a 7-temperature and humidity sensor, an 8-steam boiler, a 9-air cooler and a 10-PLC programmable controller;

31-three-phase alternating current power supply, 32-power supply cable and 33-insulating pipe sleeve; 81-vapor communication tube.

Detailed Description

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be understood that the terms "left", "right", "front", "rear", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The technical scheme of the present utility model will be further described by the following specific examples, but the scope of the present utility model is not limited to the following examples.

Embodiment 1: as shown in fig. 2, the aging test system of the alternating current metal closed switch equipment and the control equipment comprises a test box 1, a sample test station 2 arranged in the test box 1, and a power supply mechanism 3 connected to the sample test station 2, wherein a circumferentially encircling steam heating pipeline 4, a plurality of groups of heating resistance wires 5 arranged on the inner side of the steam heating pipeline 4, a cold air inlet pipe 6 leading into the test box and a temperature and humidity sensor 7 arranged in each region of the test box 1 are arranged in the test box 1; the steam boiler 8, the air cooler 9 and the PLC programmable controller 10 are arranged outside the test box 1.

Embodiment 2: the steam boiler 8 is connected with the steam heating pipeline 4 through the steam communicating pipe 81, an air outlet of the air cooler 9 is connected to the cold air inlet pipe 6, the temperature and humidity sensor 7 is connected to an input end of the PLC 10, and the heating resistance wire 5 and the air cooler 9 are respectively connected to output ends of the PLC 10. The power supply mechanism 3 comprises a three-phase alternating current power supply 31, a power supply cable 32 and an insulating sleeve 33, wherein the power supply cable 32 is connected with the output end of the three-phase alternating current power supply 31 and the test sample testing station 2 through the insulating sleeve 33, and the power supply sleeve 33 is arranged on the wall of the test box 1.

Embodiment 3: six groups of heating resistance wires 5 are adopted in the aging test system of the alternating-current metal closed switch equipment and the control equipment, and each group comprises three 10kW resistance wires. The steam boiler 8 is equipped with three groups of 6kW heating rods and three groups of 9kW heating rods. The remaining structures and components are as described in embodiment 1, and a description thereof will not be repeated.

When the test is run: in the heating temperature-rising process, the steam heating mechanism and the heating resistance wires are simultaneously started, and the heating temperature-rising rate is regulated by the boiler power and the input quantity of the heating resistance wires. Raising the temperature in the test chamber from 30 ℃ to 50 ℃ within 40min, and continuously maintaining the relative humidity at a level of more than 95%; in the process of keeping for 20min, controlling whether the heating resistance wire is closed or not by a temperature and humidity sensor; in the cooling process, the temperature in the test box needs to be reduced from 50 ℃ to 30 ℃ within 40min, and the relative humidity is more than 80%. In the process, the steam heating device is continuously started, the heating resistance wire is closed, the air cooler is started, the temperature reduction rate is ensured, and the humidity in the whole process can be effectively maintained. After maintaining at 30 ℃ for 20min, the operation is controlled by a PLC to repeat until all ageing cycles are completed.

The aging test system for the alternating-current metal-enclosed switchgear and the control equipment overcomes the defects of low temperature and humidity regulation efficiency and large personnel workload of the traditional aging test system, is simple and convenient to operate and high in reliability, and the mechanism for heating and controlling the humidity of the system is relatively independent, so that the controllable change rate of the temperature and the humidity is improved, the implementation mode is more reasonable and reliable, and the programmable controller carries out feedback control with higher automation degree on the electric heating and air cooling temperature control equipment through sensor signals, so that the workload of personnel for operation and duty is effectively reduced.

The foregoing description illustrates the major features, principles, and advantages of the utility model. It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments or examples, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The foregoing implementations or examples should be regarded as illustrative rather than limiting. The scope of the utility model is indicated by the appended claims rather than by the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (5)

1. An aging test system for alternating-current metal-enclosed switchgear and control equipment is characterized in that: comprises a test box (1), a test sample testing station (2) arranged in the test box (1) and a power supply mechanism (3) connected to the test sample testing station (2), wherein,

the test box (1) is internally provided with a circumferentially encircling steam heating pipeline (4), a plurality of groups of heating resistance wires (5) arranged on the inner side of the steam heating pipeline (4), a cold air inlet pipe (6) which is communicated with the test box and temperature and humidity sensors (7) which are arranged in each region of the test box (1); the steam boiler (8), the air cooler (9) and the PLC (10) are arranged outside the test box (1).

2. The aging test system for an ac metal enclosed switchgear and control apparatus according to claim 1, wherein: the steam boiler (8) is connected with the steam heating pipeline (4) through a steam communicating pipe (81), an air outlet of the air cooler (9) is connected to the cold air inlet pipe (6), the temperature and humidity sensor (7) is connected to an input end of the PLC (10), and the heating resistance wire (5) and the air cooler (9) are respectively connected to output ends of the PLC (10).

3. The aging test system for an ac metal enclosed switchgear and control apparatus according to claim 2, wherein: the power supply mechanism (3) comprises a three-phase alternating current power supply (31), a power supply cable (32) and an insulating pipe sleeve (33), wherein the insulating pipe sleeve (33) is arranged on the wall of the test box (1), and the power supply cable (32) is respectively connected with the output end of the three-phase alternating current power supply (31) and the test station (2) of the test sample through the insulating pipe sleeve (33).

4. The aging test system for ac metal enclosed switchgear and control equipment according to claim 3, wherein: six groups of heating resistance wires (5) are provided, and each group comprises three 10kW resistance wires.

5. The aging test system for ac metal enclosed switchgear and control equipment according to claim 4, wherein: the steam boiler (8) is provided with three groups of 6kW heating rods and three groups of 9kW heating rods.