Vacuum switch vacuum degree tester

Abstract

The utility model relates to a vacuum degree tester for a vacuum switch. The tester comprises a control panel and a magnetic control coil, a magnetic field voltage terminal and an ion current terminal are arranged on the control panel, and the control panel is connected with the magnetic control coil through the magnetic field voltage terminal so as to generate a pulsed magnetic field in the arc extinguish chamber; the control panel is connected with the vacuum switch through the ion current terminal; a side plate is arranged on the control panel, a high-voltage output terminal is arranged on the side plate, the high-voltage output terminal is connected with one contact of the vacuum switch, and the ion current terminal is connected with the other contact of the vacuum switch, so that pulse high voltage synchronous with the pulse magnetic field is applied to an arc extinguish chamber of the vacuum switch; enabling electrons in the arc extinguish chamber to perform spiral action and generate collision ionization with residual gas molecules, and measuring the vacuum degree of the vacuum switch according to the corresponding relation between the vacuum degree and the ion current; the control panel is also provided with a tubular input dial switch, and the tubular input dial switch is used for inputting the tube of the vacuum switch arc extinguish chamber.

Description

Technical field:

[0001] The utility model relates to a vacuum degree tester for a vacuum switch. Background technology:

[0002] A vacuum switch is a switch that detects the vacuum range, also known as a vacuum relay. Its function is: when the vacuum degree generated in actual work reaches the specified requirements, it automatically opens and closes the control circuit, sends out an electrical signal, and instructs the vacuum adsorption mechanism to operate normally.

[0003] Generally, the vacuum degree of a vacuum switch is detected by using an industrial frequency withstand voltage method. This method can only detect arc extinguishing chambers with severely deteriorated vacuum degree. For scenarios where the vacuum degree is not seriously deteriorated, although the breakdown voltage is not reduced, the arc extinguishing chamber no longer meets the actual application requirements, resulting in low overall detection accuracy and poor detection stability. The arc extinguishing chamber needs to be disassembled during the detection process, and the mechanical parameters of the arc extinguishing chamber need to be adjusted when reinstalling it, which results in a large workload, cumbersome overall detection steps, and inconvenient operation. Utility model content:

[0004] The embodiment of the utility model provides a vacuum degree tester for a vacuum switch, which has a reasonable structural design, is based on the mutual cooperation of multiple functional components, adopts magnetron discharge technology, and combines the synchronous control and data acquisition processing of a microcomputer. It can output pulse high voltage and magnetic field voltage, generate pulse magnetic field and strong electric field, and test the vacuum degree of the arc extinguishing chamber according to the corresponding relationship curve between the vacuum degree and ion current of various tube-type vacuum switches. There is no need to disassemble the arc extinguishing chamber, which simplifies the overall detection steps, improves the accuracy and sensitivity of vacuum degree detection, is easy to operate, and can be widely used in electricity, steel, petrochemical, coal, railway and other industries, solving the problems existing in the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] A vacuum switch vacuum degree tester, the tester comprising a control panel and a magnetron coil; the magnetron coil is used to surround an arc extinguishing chamber on the side for vacuum degree testing, a magnetic field voltage terminal and an ion current terminal are provided on the control panel, the control panel is connected to the magnetron coil via the magnetic field voltage terminal to generate a pulse magnetic field in the arc extinguishing chamber; the control panel is connected to the vacuum switch via the ion current terminal;

[0007] A side panel is provided on the control panel, and a high-voltage output terminal is provided on the side panel. The high-voltage output terminal is connected to one contact of the vacuum switch, and the ion current terminal is connected to another contact of the vacuum switch, so as to apply a pulse high voltage synchronized with the pulse magnetic field to the arc extinguishing chamber of the vacuum switch, so that the electrons in the arc extinguishing chamber perform a spiral motion and collide and ionize with the residual gas molecules, and the vacuum degree of the vacuum switch is measured according to the corresponding relationship between the vacuum degree and the ion current; a tube type input dial switch is also provided on the control panel, and the tube type input dial switch is used to input the tube type of the vacuum switch arc extinguishing chamber.

[0008] The magnetic control coil is arranged in the middle position of the arc extinguishing chamber of the vacuum switch.

[0009] A leak detection button, a measurement button and a reset button are provided on the control panel. The leak detection button is used to reduce the magnetic field voltage to perform quality testing on the vacuum switch to determine whether the vacuum switch leakage is qualified; the measurement button is used to apply high voltage and strong electromagnetic field to perform quantitative testing on the vacuum degree of the vacuum switch; the reset button is used to restart the tester.

[0010] A ground terminal, a power socket and a power switch are provided on the control panel to supply power to the tester.

[0011] The test panel is provided with a printer, a display screen and a communication interface.

[0012] A microcontroller is arranged in the control panel, and the microcontroller is used for synchronous control and data acquisition processing; the microcontroller is a single chip microcomputer.

[0013] The utility model adopts the above structure, and performs vacuum degree test by surrounding the arc extinguishing chamber on the side with a magnetic control coil, connects the control panel with the magnetic control coil through the magnetic field voltage terminal to generate a pulse magnetic field in the arc extinguishing chamber, and connects the control panel with the vacuum switch through the ion current terminal; connects with one contact of the vacuum switch through the high-voltage output terminal, and connects with the other contact of the vacuum switch through the ion current terminal, so as to apply a pulse high voltage synchronized with the pulse magnetic field to the arc extinguishing chamber of the vacuum switch, so that the electrons in the arc extinguishing chamber perform a spiral motion and collide and ionize with the residual gas molecules, and the vacuum degree of the vacuum switch is measured according to the corresponding relationship between the vacuum degree and the ion current, which has the advantages of safety, stability, accuracy and high efficiency. Description of the drawings:

[0014] Figure 1 It is a structural schematic diagram of the utility model. Specific implementation method:

[0015] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0016] like Figure 1 As shown in, a vacuum switch vacuum degree tester, the tester includes a control panel and a magnetron coil; the magnetron coil is used to surround the arc extinguishing chamber on the side to perform vacuum degree test, and a magnetic field voltage terminal and an ion current terminal are provided on the control panel, the control panel is connected to the magnetron coil through the magnetic field voltage terminal to generate a pulse magnetic field in the arc extinguishing chamber; the control panel is connected to the vacuum switch through the ion current terminal;

[0017] A side panel is provided on the control panel, and a high-voltage output terminal is provided on the side panel. The high-voltage output terminal is connected to one contact of the vacuum switch, and the ion current terminal is connected to another contact of the vacuum switch, so as to apply a pulse high voltage synchronized with the pulse magnetic field to the arc extinguishing chamber of the vacuum switch, so that the electrons in the arc extinguishing chamber perform a spiral motion and collide and ionize with the residual gas molecules, and the vacuum degree of the vacuum switch is measured according to the corresponding relationship between the vacuum degree and the ion current; a tube type input dial switch is also provided on the control panel, and the tube type input dial switch is used to input the tube type of the vacuum switch arc extinguishing chamber.

[0018] The magnetic control coil is arranged in the middle position of the arc extinguishing chamber of the vacuum switch.

[0019] A leak detection button, a measurement button and a reset button are provided on the control panel. The leak detection button is used to reduce the magnetic field voltage to perform quality testing on the vacuum switch to determine whether the vacuum switch leakage is qualified; the measurement button is used to apply high voltage and strong electromagnetic field to perform quantitative testing on the vacuum degree of the vacuum switch; the reset button is used to restart the tester.

[0020] A ground terminal, a power socket and a power switch are provided on the control panel to supply power to the tester.

[0021] The test panel is provided with a printer, a display screen and a communication interface.

[0022] A microcontroller is arranged in the control panel, and the microcontroller is used for synchronous control and data acquisition processing; the microcontroller is a single chip microcomputer.

[0023] The working principle of a vacuum degree tester for a vacuum switch in the embodiment of the utility model is: based on the mutual cooperation of multiple functional components, it adopts magnetron discharge technology, combined with the synchronous control and data acquisition processing of a microcomputer, it can output pulse high voltage and magnetic field voltage, generate pulse magnetic field and strong electric field, and test the vacuum degree of the arc extinguishing chamber according to the corresponding relationship curve between the vacuum degree and ion current of various tube-type vacuum switches. There is no need to disassemble the arc extinguishing chamber, which simplifies the overall detection steps, improves the accuracy and sensitivity of vacuum degree detection, is easy to operate, and can be widely used in electricity, steel, petrochemical, coal, railway and other industries.

[0024] In the overall scheme, the tester includes a control panel and a magnetron coil; the magnetron coil is used to surround the arc extinguishing chamber on the side to perform vacuum testing, and a magnetic field voltage terminal and an ion current terminal are provided on the control panel. The control panel is connected to the magnetron coil through the magnetic field voltage terminal to generate a pulse magnetic field in the arc extinguishing chamber; the control panel is connected to the vacuum switch through the ion current terminal;

[0025] A side panel is provided on the control panel, and a high-voltage output terminal is provided on the side panel. The high-voltage output terminal is connected to one contact of the vacuum switch, and the ion current terminal is connected to another contact of the vacuum switch, so as to apply a pulse high voltage synchronized with the pulse magnetic field to the arc extinguishing chamber of the vacuum switch, so that the electrons in the arc extinguishing chamber perform a spiral motion and collide and ionize with the residual gas molecules, and the vacuum degree of the vacuum switch is measured according to the corresponding relationship between the vacuum degree and the ion current; a tube type input dial switch is also provided on the control panel, and the tube type input dial switch is used to input the tube type of the vacuum switch arc extinguishing chamber.

[0026] Specifically, two contacts of the arc extinguishing chamber are pulled apart by a certain distance, pulsed high voltage is applied, the magnetic control coil is arranged on the outside of the vacuum switch arc extinguishing chamber, and a magnetic field voltage is applied to the coil, thereby generating synchronous pulsed high voltage and pulsed magnetic field in the vacuum switch arc extinguishing chamber. Under the action of the pulsed high voltage and pulsed magnetic field, the electrons in the arc extinguishing chamber perform spiral motion and collide and ionize with the residual gas molecules, and the generated ion current is proportional to the density of the residual gas, that is, the vacuum value. Due to the different structures of vacuum switches of different models, the magnitude of the ion current is different under the conditions of the same contact distance, the same vacuum degree, the same electric field and the same magnetic field. Therefore, the vacuum degree of the corresponding tube type vacuum switch is obtained by calibrating the corresponding relationship curve between the vacuum degree and the ion current of various tube types.

[0027] Preferably, a leak detection button, a measurement button and a reset button are provided on the control panel. The leak detection button is used to reduce the magnetic field voltage to perform quality testing on the vacuum switch and determine whether the vacuum switch leakage is qualified; the measurement button is used to apply high voltage and strong electromagnetic field to perform quantitative testing on the vacuum degree of the vacuum switch; the reset button is used to restart the tester; the ground terminal is used for protective grounding of the instrument casing.

[0028] It should be noted that a leak test should be carried out before testing the vacuum degree of the vacuum switch. When checking for leaks, attention should be paid to whether the outside of the vacuum switch is wiped clean and dried; quantitative testing can be carried out only after the leak test is qualified.

[0029] In actual operation, after pressing the measurement button, the electric field voltage and magnetic field voltage are first displayed and automatically charged. When the two voltages reach a certain value, the electric field voltage and magnetic field voltage are automatically added to the vacuum switch and the magnetron coil. The microcontroller starts, displays the test results of the vacuum switch under test, and automatically discharges the internal capacitance of the instrument.

[0030] The minimum measurement value of this tester is 1.06*10 -6 Pa, if the vacuum degree of the vacuum switch being tested is lower than this value, the displayed result is considered to be 1.06*10 -6 Pa, indicating that the vacuum bubble is in good condition, such as vacuum degree greater than 6.6*10 -2 Pa, the vacuum degree of the vacuum switch is unqualified.

[0031] When a unified vacuum switch is tested multiple times, the time interval between two adjacent measurements shall be no less than 10 minutes. At the same time, the power supply of the instrument shall be turned off to eliminate the residual high voltage before the next test.

[0032] Specifically, press the leak detection button to perform leak detection, reduce the magnetic field voltage, press the reset button after the action is completed, and then shut down the machine; ground the high-voltage output terminal to discharge it to the ground, or touch the vacuum switch tube end with a discharge rod, or short-circuit the ion current clamp with the high-voltage end clamp to eliminate residual high voltage and static electricity generated during the test.

[0033] It should be noted that the vacuum tester should be operated in sunny and dry weather, the surface of the vacuum switch should be wiped clean, and fixed time intervals should be set to avoid distortion of the test results.

[0034] To sum up, a vacuum degree tester for a vacuum switch in an embodiment of the utility model is based on the mutual cooperation of multiple functional components, adopts magnetron discharge technology, and combines the synchronous control and data acquisition processing of a microcomputer. It can output pulse high voltage and magnetic field voltage, generate pulse magnetic field and strong electric field, and test the vacuum degree of the arc extinguishing chamber according to the corresponding relationship curve between the vacuum degree and ion current of various tube-type vacuum switches. There is no need to disassemble the arc extinguishing chamber, which simplifies the overall detection steps, improves the accuracy and sensitivity of vacuum degree detection, is easy to operate, and can be widely used in electricity, steel, petrochemical, coal, railway and other industries.

[0035] The above-mentioned specific implementation manner cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or change made to the implementation manner of the present utility model falls within the protection scope of the present utility model.

[0036] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A vacuum switch vacuum degree tester, characterized in that: The tester comprises a control panel and a magnetron coil; the magnetron coil is used to surround the arc extinguishing chamber on the side to perform a vacuum test, and a magnetic field voltage terminal and an ion current terminal are provided on the control panel. The control panel is connected to the magnetron coil via the magnetic field voltage terminal to generate a pulse magnetic field in the arc extinguishing chamber; the control panel is connected to the vacuum switch via the ion current terminal; A side panel is provided on the control panel, and a high-voltage output terminal is provided on the side panel. The high-voltage output terminal is connected to one contact of the vacuum switch, and the ion current terminal is connected to another contact of the vacuum switch, so as to apply a pulse high voltage synchronized with the pulse magnetic field to the arc extinguishing chamber of the vacuum switch, so that the electrons in the arc extinguishing chamber perform a spiral motion and collide and ionize with the residual gas molecules, and the vacuum degree of the vacuum switch is measured according to the corresponding relationship between the vacuum degree and the ion current; a tube type input dial switch is also provided on the control panel, and the tube type input dial switch is used to input the tube type of the vacuum switch arc extinguishing chamber.

2. A vacuum switch vacuum degree tester according to claim 1, characterized in that: The magnetic control coil is arranged in the middle position of the arc extinguishing chamber of the vacuum switch.

3. The vacuum switch vacuum degree tester according to claim 1, characterized in that: A leak detection button, a measurement button and a reset button are provided on the control panel. The leak detection button is used to reduce the magnetic field voltage to perform quality testing on the vacuum switch to determine whether the vacuum switch leakage is qualified; the measurement button is used to apply high voltage and strong electromagnetic field to perform quantitative testing on the vacuum degree of the vacuum switch; the reset button is used to restart the tester.

4. The vacuum switch vacuum degree tester according to claim 1, characterized in that: A ground terminal, a power socket and a power switch are provided on the control panel to supply power to the tester.

5. The vacuum switch vacuum degree tester according to claim 1, characterized in that: The test panel is provided with a printer, a display screen and a communication interface.

6. The vacuum switch vacuum degree tester according to claim 1, characterized in that: A microcontroller is arranged in the control panel, and the microcontroller is used for synchronous control and data acquisition processing; the microcontroller is a single chip microcomputer.

Images