Voltage withstand test stand with adjustable partial pressure ratio

Abstract

The utility model belongs to the technical field of voltage withstanding tests, and particularly discloses a voltage withstanding test bench with an adjustable partial pressure ratio. Comprising a cabinet body, a grounding device, a partial pressure adjusting device and a charge measuring device. The voltage-dividing adjusting device and the charge measuring device are arranged above the cabinet body, the voltage-dividing adjusting device comprises a voltage-dividing switch, a voltage-dividing adjusting knob and a connector, the voltage-dividing switch is electrically connected with a power supply, the voltage-dividing adjusting knob is connected with an internal resistor of the voltage-dividing adjusting device, the connector is used for being connected with a workpiece to be measured, and the voltage-dividing adjusting knob is connected with the internal resistor of the voltage-dividing adjusting device. And the grounding device is arranged in the cabinet body and is electrically connected with the partial pressure adjusting device and the charge measuring device. In the practical application, the voltage dividing device is used for adjusting the output voltage of the power supply, so that the measured voltage has various threshold values, various measured voltages can be provided, and the application range of the device is widened.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of pressure test, specifically discloses a kind of withstand voltage test bench with adjustable partial pressure ratio. BACKGROUND

[0002] With the vigorous development of large-scale power generation projects in the energy field, the rise of nuclear power plants, thermal power plants and hydroelectric power stations, and the continuous breakthroughs in ultra-high voltage transmission technology, the power supply capacity of modern power grids is moving towards unprecedented new heights. Consequently, there are unprecedented high standards for the insulation performance of electrical facilities. Insulation defects can become hidden dangers that cause major safety accidents, threatening public safety and the stable operation of the power system. Therefore, it is essential to ensure that electrical equipment can withstand extreme voltage conditions before installation and operation, and to conduct strict and comprehensive withstand voltage tests.

[0003] The patent application number CN116626456B is a kind of external withstand voltage test equipment of power transformer, including the insulating mounting plate fixedly installed on base, three installation grooves are set from top to bottom in the insulating mounting plate, the right side wall of each installation groove is fixedly installed with insulating fixed disc, each insulating fixed disc is fixedly installed with wire rod, each wire rod other end is fixedly installed with insulating connecting disc, three insulating fixed discs and corresponding insulating connecting disc are sequentially fixedly installed with first resistance rod, second resistance rod and third resistance rod from top to bottom. The device cannot adjust the output voltage when conducting withstand voltage test on workpiece, and can only measure workpiece with specified withstand voltage. Therefore, it is urgent for the technical personnel in the field to solve the above technical problems. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to provide a withstand voltage test bench with adjustable partial pressure ratio to solve the above problems of the prior art. The withstand voltage test bench with adjustable partial pressure ratio adjusts the output voltage of power supply through a partial pressure adjusting device, so that the device can conduct withstand voltage test on more workpieces.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A withstand voltage test bench with adjustable partial pressure ratio, comprising a cabinet, a grounding device, a partial pressure adjusting device and a charge measuring device. The partial pressure adjusting device and the charge measuring device are arranged above the cabinet. The partial pressure adjusting device comprises a partial pressure switch, a partial pressure adjusting knob and a connecting head. The partial pressure switch is electrically connected to a power supply. The partial pressure adjusting knob is connected to the internal resistance of the partial pressure adjusting device. The connecting head is arranged on the side wall of the partial pressure adjusting device. The grounding device is arranged in the cabinet and electrically connected to the partial pressure adjusting device and the charge measuring device.

[0007] Further, the cabinet further comprises a control cabinet, a cabinet door and a grounding hole; the control cabinet is provided with a control panel, the control cabinet is arranged on the left side of the cabinet, the cabinet door is arranged on the right side of the cabinet, the grounding device is arranged behind the cabinet door, the grounding device is electrically connected with the voltage division adjusting device and the charge measuring device through the grounding hole; the control cabinet is electrically connected with a power supply, and the control cabinet is used for controlling the opening and closing of the power supply.

[0008] The integration of the control cabinet and the control panel, especially the arrangement of the control cabinet on the left side of the cabinet, facilitates the operator to directly set and monitor various test parameters without going around or entering the inside of the cabinet, which greatly improves the convenience and efficiency of operation. The cabinet door is arranged on the right side of the cabinet and is opposite to the control cabinet, which is beneficial to separate the daily operation area from the maintenance area. The grounding device arranged behind the cabinet door facilitates the maintenance personnel to check and maintain the grounding system while keeping the operation area clean and safe. The grounding device is directly electrically connected with the voltage division adjusting device and the charge measuring device through the grounding hole in the cabinet, forming a simple and efficient grounding network. In this way, not only the charge in the test process can be quickly and safely released, but also the resistance of the grounding loop is reduced, the safety and stability of the system are improved. The control cabinet is electrically connected with the power supply and is responsible for controlling the opening and closing of the power supply, which means that all power management functions are concentrated in one place, simplifying the operation process, reducing the risk of misoperation, and also facilitating the rapid shutdown of the power supply in emergency situations to ensure the safety of personnel and equipment.

[0009] Further, the shell of the voltage division adjusting device is made of aluminum alloy, and the shell is sprayed with polyurethane paint.

[0010] The aluminum alloy material has the characteristics of small density and high strength, so that the partial pressure adjusting device is light in weight on the basis of ensuring the structural strength and stability, is convenient to carry and install, and also reduces the burden of the supporting structure. The polyurethane paint, as a high-performance insulating material, significantly enhances the electrical insulation performance of the shell after being sprayed on the surface of the aluminum alloy shell, prevents the shell from being electrically connected with the outside in a high-pressure environment, reduces the risk of electric leakage, and improves the safety of the test. The aluminum alloy itself has good corrosion resistance, plus the additional protective layer of polyurethane paint, can effectively resist the corrosion of humid, salt spray, chemicals and other harsh environments, prolong the service life of the equipment, reduce the maintenance cost, the coating of polyurethane paint not only provides protection, but also makes the shell surface smooth and flat, which helps to improve the appearance of the equipment, reduces the accumulation of dirt and dust, and is easy to clean and maintain. The polyurethane paint has good thermal stability and can maintain its physical and chemical properties unchanged within a wide temperature range, ensuring the reliability and stability of the partial pressure adjusting device under different environmental temperatures. The modern polyurethane paint formula usually focuses on environmental protection, with low volatile organic compound (VOC) content, less impact on the environment and operating personnel's health, and meets the standards of modern safety production and environmental protection.

[0011] Further, the charge measuring device comprises a measuring column, a display panel and a measuring switch; the measuring switch is electrically connected with the control cabinet, the measuring column is arranged on the upper part of the charge measuring device, and the display panel is electrically connected with the measuring column.

[0012] The display panel is directly electrically connected with the measuring column, can display the measurement result in real time, enables the operator to quickly understand the charge state of the measured equipment, improves the test efficiency and reaction speed, and is convenient for timely adjustment or judgment. The design that the measuring switch is electrically connected with the control cabinet simplifies the operation process, so that the operator can remotely control the start and end of measurement on the control cabinet panel without directly contacting the high-voltage part, thereby increasing the safety of operation. The measuring column, as the direct contact point of charge measurement, is usually designed to have good electrical contact performance and high-voltage resistance, to ensure the accuracy and stability of the measurement data, which is crucial for ensuring the safe operation of electrical equipment. By integrating the measuring column, the display panel and the measuring switch into one unit, the modularity of the charge measurement function is realized, which is convenient for maintenance and upgrading. If a part needs to be replaced or upgraded, it can be handled specifically without affecting the normal work of other parts. By physically isolating the measurement operation from the high-voltage part and indirectly operating through the control cabinet, the risk of direct contact of the operator with high voltage is significantly reduced, which meets the safety specifications for high-voltage work and improves the safety level of the entire test process. The design clearly divides the control part and the measurement part, which is convenient for technicians to diagnose faults and perform daily maintenance, reduces the complexity of maintenance work, and ensures the long-term stable operation of the equipment.

[0013] Further, the connecting head is sleeved with insulating silica gel, and a plurality of connecting heads are arranged.

[0014] The insulating silica gel is a material with high dielectric strength, which can effectively prevent high-voltage current from being conducted to the outside, ensure good electrical insulation performance even in a high-voltage environment, and significantly improve the safety of the test.

[0015] The insulating silica gel layer can prevent moisture, dust and other contaminants from entering the connection part, reduce the problem of poor contact or corrosion caused by environmental factors, and ensure the stability of the connection and the accuracy of the test results.

[0016] The design of multiple connecting heads means that the withstand voltage test bench can adapt to different types of test requirements.

[0017] The use of insulating silica gel provides a clear safety mark visually, reminding the operator which areas are high-voltage parts and should be handled with care, further enhancing the safety awareness of on-site operations.

[0018] The insulating silica gel layer can prevent moisture, dust and other contaminants from entering the connection part, reduce the problem of poor contact or corrosion caused by environmental factors, and ensure the stability of the connection and the accuracy of the test results. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the front view of the utility model.

[0020] Figure 2 is the left view of the utility model.

[0021] Figure 3 is the top view of the utility model.

[0022] Figure 4It is the structural schematic view of the voltage division adjusting device.

[0023] Therein, 1-cabinet body; 11-cabinet door; 12-control cabinet; 121-control panel; 13-grounding device; 131-grounding hole; 2-voltage division adjusting device; 21-voltage division switch; 22-voltage division adjusting knob; 23-connection head; 24-housing; 3-charge measuring device; 31-measuring column; 32-display panel; 33-measuring switch. DETAILED DESCRIPTION

[0024] The utility model will be described in further detail below in combination with the drawings and specific preferred embodiments.

[0025] In the description of the utility model, it should be understood that the terms "left side", "right side", "upper part", "lower part" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and "first", "second" and the like do not represent the importance of the parts, so it cannot be understood as a limitation on the utility model. The specific size used in the embodiment is only for the purpose of illustrating the technical scheme, and does not limit the protection scope of the utility model.

[0026] Referring to Figure 1 , Figure 2 and Figure 3 , it can be seen that a voltage division ratio adjustable withstand voltage test bench comprises a cabinet body 1 constituting a device main body, the cabinet body 1 comprises a cabinet door 11, the cabinet door 11 is arranged on the right side of the cabinet body 1, the cabinet door 11 is provided with a grounding device 13 at the back, the grounding device 13 is connected with a voltage division adjusting device 2 and a charge measuring device 3 through a grounding hole 131, the grounding hole 131 is arranged on the top of the cabinet body 1, at the same time, the voltage division adjusting device 2 and the charge measuring device 3 are arranged above the cabinet body 1, a control cabinet 12 is arranged on the left side of the cabinet body 1, the control cabinet 12 is provided with a control cabinet 121, the charge measuring device 3 is fixed on the cabinet body 1 through bolts, three measuring columns 31 are arranged on the upper part of the charge measuring device 3, a display panel 32 is arranged on the middle part, and a measuring switch 33 is arranged on the right side, two connection heads are arranged on the side wall of the voltage division adjusting device 2.

[0027] In one embodiment, the cabinet body 1 is placed in a predetermined position, ensuring that the ground is flat and stable, the cabinet door 11 is installed to the right side of the cabinet body 1, and the specified bolts are used to fix it, ensuring that the cabinet door 11 opens and closes smoothly and seals well, the control cabinet 12 is installed on the left side of the cabinet body 1, and is fixed with screws and other fasteners, the control panel 121 is installed on the control cabinet 12, ensuring that all control buttons, indicator lights, etc. can operate and display normally, the grounding device 13 is installed behind the cabinet door 11, and the grounding hole 131 ensures that the grounding device is reliably connected to the voltage division adjustment device 2 and the charge measuring device 3 on the top of the cabinet body 1. The connection is completed using appropriate grounding wires and fasteners, ensuring that the grounding resistance meets safety standards, the voltage division adjustment device 2 and the charge measuring device 3 are placed in a predetermined position above the cabinet body 1 and fixed by bolts and other fixing devices, ensuring that they are stable and do not shake. The side wall of the voltage division adjustment device 2 is provided with two connecting heads for subsequent connection with the measured equipment, three measuring columns 31 are installed on the upper part of the charge measuring device 3, a display panel 32 is installed in the middle for displaying measurement results, and a measurement switch 33 is installed on the right side for controlling the start and stop of measurement. An insulating silicone sleeve is used on the connecting head 23 of the voltage division adjustment device 2 to ensure insulation safety. The control panel 121 of the control cabinet 12 is used to perform initial connection and start-up test of the power supply, and to check whether each component is working normally, including whether the voltage division adjustment knob 22 can be effectively adjusted and whether the display panel 32 of the charge measuring device 3 can correctly display data.

[0028] After the voltage resistance test of the device is completed, the workpiece is discharged by the discharge device, and after the discharge is completed, the workpiece is connected to the measuring column 31 through the measuring line to measure the residual charge of the workpiece. After the workpiece is connected, the measurement switch 33 is turned on, and the workpiece charge measurement result is displayed on the display panel 32. The charge measurement result is displayed on the display panel 32 of the charge measuring device in real time. The display panel 32 uses a digital interface to display the measured charge, and the operator can determine whether the workpiece has been safely discharged and whether the discharge degree meets the expected or standard requirements according to the display result.

[0029] Referring to Figure 4 It can be seen that the voltage division adjustment assembly 2 includes a voltage division switch 21, a voltage division adjustment knob 22, a connecting head 23, and a housing 24. The housing 24 is provided with two connecting heads 23 on the side, and the voltage division switch 21 and the voltage division adjustment knob 22 are arranged on the housing 24. The voltage division switch 21 is electrically connected to the internal voltage of the control cabinet 12, and the voltage division adjustment knob 22 is connected to the resistance inside the voltage division adjustment device 2.

[0030] In one embodiment, when the voltage division adjusting device 2 is assembled, first, ensure that the housing 24 of the voltage division adjusting device 2 is correctly placed in the designated position above the cabinet 1, use bolts to fix the housing 24 on the cabinet 1, ensure that the installation is firm and horizontal, so as to avoid unnecessary vibration or displacement during operation, the housing 24 needs to be sprayed with polyurethane paint to enhance its insulation performance, the voltage division switch 21 and the voltage division adjusting knob 22 are installed on the housing 24. Ensure that both are correctly connected and connected according to the circuit diagram, the voltage division switch 21 is directly connected to the power supply circuit inside the control cabinet 12 to realize the on-off control of the power supply, the voltage division adjusting knob 22 is connected to the resistance device inside the housing (this is a prior art, which will not be described here), the worker can adjust the resistance value by rotating the voltage division adjusting knob 22, thereby changing the voltage division ratio, two connecting heads 23 are installed on the side of the housing 24, which are used for connection with the measured equipment or test circuit, the connecting heads 23 are wrapped with insulating silica gel sleeve to ensure electrical safety, the connecting heads 23 should be ensured to be correctly connected with the internal circuit to realize the effective transmission of voltage and the voltage division adjusting function, after completing all internal wiring, check whether the circuit connection meets the design requirements, pay special attention to whether the voltage division adjusting knob 22 is firmly connected with the resistance and whether the voltage division switch 21 is correctly connected with the power supply of the control cabinet 12, perform preliminary circuit power-on test through the control cabinet 12 to confirm that the circuit function of the voltage division adjusting assembly 2 is normal, there is no short circuit or open circuit phenomenon;

[0031] When the voltage division adjusting device 2 is working, after the power supply is connected through the voltage division switch 21, the current will flow through the resistance inside the voltage division adjusting device 2, the voltage division adjusting knob 22 adjusts the resistance value in the circuit, thereby adjusting the resistance voltage division ratio, and then affecting the voltage size output to the measured equipment, when the voltage division adjusting knob 22 is rotated clockwise, the resistance value is increased, the voltage division ratio is increased, and the voltage output to the measured equipment is relatively reduced; on the contrary, the resistance value is reduced, the voltage division ratio is reduced, and the output voltage is increased.

[0032] The preferred embodiments of the utility model are described in detail above, but the utility model is not limited to the specific details in the above embodiments, within the technical concept of the utility model, the technical scheme of the utility model can be variously equivalent, and these equivalent belong to the protection scope of the utility model.

Claims

1. A voltage dividing ratio adjustable withstand voltage test bench, characterized in that: The application relates to a cabinet for measuring electric charge, which comprises a cabinet body, a grounding device, a voltage division adjusting device and an electric charge measuring device; the voltage division adjusting device and the electric charge measuring device are arranged above the cabinet body; the voltage division adjusting device comprises a voltage division switch, a voltage division adjusting knob and a connecting head; the voltage division switch is electrically connected with a power supply; the voltage division adjusting knob is connected with an internal resistor of the voltage division adjusting device; the connecting head is arranged on the side wall of the voltage division adjusting device; the grounding device is arranged in the cabinet body and is electrically connected with the voltage division adjusting device and the electric charge measuring device.

2. The voltage withstand test bench with adjustable voltage division ratio according to claim 1, characterized in that: The cabinet body further comprises a control cabinet, a cabinet door and a grounding hole; a control panel is arranged on the control cabinet; the control cabinet is arranged on the left side of the cabinet body; the cabinet door is arranged on the right side of the cabinet body; the grounding device is arranged behind the cabinet door and is electrically connected with the voltage division adjusting device and the electric charge measuring device through the grounding hole; the control cabinet is electrically connected with the power supply and is used for controlling the opening and closing of the power supply.

3. The voltage withstand test platform with adjustable voltage division ratio according to claim 1, characterized in that: The shell of the voltage division adjusting device is made of aluminum alloy and is sprayed with polyurethane paint.

4. The voltage withstand test platform with adjustable voltage division ratio according to claim 2, characterized in that: The electric charge measuring device comprises a measuring column, a display panel and a measuring switch; the measuring switch is electrically connected with the control cabinet; the measuring column is arranged on the upper portion of the electric charge measuring device; and the display panel is electrically connected with the measuring column.

5. The voltage withstand test platform with adjustable voltage division ratio according to claim 1, characterized in that: Insulating silica gel is sleeved on the connecting head; and a plurality of connecting heads are arranged.

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