One-key discharging device of direct current withstand voltage tester

Abstract

The utility model discloses a DC withstand voltage tester one-key discharge device comprising a sleeve, one side of the sleeve is fixedly provided with a mounting seat, the other side of the sleeve is fixedly provided with a high-voltage joint, and the inner wall of the sleeve is fixedly provided with a limit switch; the movable rod is matched with the inner wall of the sleeve, a grounding wire is fixed to the side, away from the sleeve, of the movable rod, a connecting wire is fixed in the movable rod, a first connector is fixed to the side, close to the sleeve, of the movable rod, and a second connector is fixed to the middle of the movable rod; and the grounding wire is directly connected with the second connector through a connecting lead. The utility model relates to the technical field of direct current withstand voltage tester discharge equipment. According to the utility model, the control circuit controls the lifting motor to rotate forwards and backwards, so that automatic discharge of the direct-current withstand voltage tester is controlled, the automation degree is high, the discharge process is visual, and the safety and reliability of the whole discharge process are ensured at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of discharge equipment of a DC withstand voltage tester, in particular to a one-button discharge device for a DC withstand voltage tester. Background Art

[0002] A DC hipot tester is an instrument used to measure and evaluate the insulation performance of electrical equipment. It applies a high DC voltage to test the insulation strength of the object being tested. This test method effectively identifies weaknesses or defects in insulation materials, thereby ensuring the safety and reliability of the equipment during actual operation. Existing DC hipot testers typically use a discharge probe to perform the discharge operation.

[0003] The traditional discharge rod structure is as follows Figure 1 As shown, after the DC withstand voltage tester completes the test, the circuit is as follows Figure 2 As shown, connecting pins 2 and 3 of DS1 resets the instrument, disconnecting start relay ⑤ and returning the voltage regulator to zero. Slowly approach the discharge tip of the discharge rod to the high-voltage terminal to discharge the voltage. Finally, short-circuit the ground terminal of the discharge rod with the high-voltage terminal to complete the discharge. However, in an all-in-one device, automatic and intuitive discharge are the hallmarks of integration. Manual discharge no longer meets these requirements and poses certain safety risks.

[0004] To this end, the utility model provides a one-button discharge device for a DC withstand voltage tester to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a one-button discharge device for a DC withstand voltage tester, which solves the above problems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a one-button discharge device for a DC withstand voltage tester, comprising:

[0007] A bushing, wherein a mounting seat is fixed on one side of the bushing, a high-voltage connector is fixed on the other side of the bushing, and a limit switch is fixed on the inner wall of the bushing;

[0008] A movable rod, wherein the movable rod is aligned with the inner wall of the casing, a grounding wire is fixed on the side of the movable rod away from the casing, a connecting wire is fixed inside the movable rod, a No. 1 connector is fixed on the side of the movable rod close to the casing, a No. 2 connector is fixed in the middle of the movable rod, the grounding wire is directly connected to the No. 2 connector through the connecting wire, the grounding wire is connected to the No. 1 connector after being connected in series with a high-voltage resistor through the connecting wire, a guide groove is opened on the inner wall of the casing to match the No. 1 connector and the No. 2 connector, one end of the high-voltage connector is located in the guide groove, and the movable rod is filled with silicone;

[0009] An electric push rod, one end of which is equipped with a lifting motor for driving the electric push rod to extend and retract, the movable end of the electric push rod is fixedly connected to one end of the movable rod, and the lifting motor is connected to a control circuit.

[0010] Preferably, the control circuit includes a timer U1, a timer U2, a local control connector DS1, an external control connector DS5, a time circuit connector J3, a transformer connector J4, a relay JK1, a relay JK2, a microphone MK1, a plurality of resistors, a plurality of capacitors, a plurality of diodes and a plurality of transistors.

[0011] Preferably, the signal of pin 6 of the timer U1 is connected to pin 1 of the local control connector DS1, pin 2 of the external control connector DS5 and pin 1 of the time circuit connector J3; the signal of pin 4 of the timer U1 is connected to pin 2 of the local control connector DS1, pin 3 of the external control connector DS5, pin 2 of the time circuit connector J3 and pin 10 of the timer U2; the signal of pin 5 of the timer U1 is connected in series with resistor R6 and diode D1 and then connected to pins 9 and 13 of the relay JK2.

[0012] Preferably, the signal of pin 1 of the relay JK1 is connected to pin 1 of the transformer connector J4, the signal of pin 8 of the relay JK1 is connected to pin 2 of the transformer connector J4, the signal of pin 7 of the relay JK1 is connected in series with resistor R17 and then connected to pin 5 of the time circuit connector J3, and the signal of pin 7 of the relay JK1 is connected in series with resistor R12 and then connected to pins 9 and 10 of the local control connector DS1.

[0013] Preferably, pins 10 and 11 of the relay JK2 are connected to a 12V switching power supply, pin 5 of the relay JK2 is connected in series to a limit switch and the normally closed contact of the relay JK1 and then to ground, pins 3 and 4 of the relay JK2 are connected to both ends of the lifting motor, and pin 9 of the relay JK2 is connected in series to the discharge button S1 and then to pin 5. Beneficial effects

[0014] The utility model provides a one-button discharge device for a DC withstand voltage tester. Compared with the prior art, it has the following beneficial effects:

[0015] The utility model controls the forward and reverse rotation of the lifting motor through the control circuit provided, thereby realizing automatic discharge of the DC withstand voltage tester, with a high degree of automation, an intuitive discharge process, and ensuring the safety and reliability of the entire discharge process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the structure of a traditional discharge rod in the background art;

[0017] Figure 2 It is a circuit diagram of a DC withstand voltage tester of background technology;

[0018] Figure 3 This is a three-dimensional diagram of the external structure of the utility model;

[0019] Figure 4 This is a three-dimensional diagram of the internal structure of the sleeve and the movable rod of the utility model;

[0020] Figure 5 It is a circuit diagram of the control circuit of the utility model.

[0021] In the figure, 1. Mounting base; 2. Bushing; 3. High-voltage connector; 4. Movable rod; 5. Grounding wire; 6. Connecting wire; 7. High-voltage resistor; 8. Connector No. 1; 9. Connector No. 2; 10. Electric telescopic rod; 11. Lifting motor; 12. Limit switch. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0023] See also Figure 3-5 , DC withstand voltage tester one-button discharge device, including:

[0024] The bushing 2 has a mounting base 1 fixed on one side thereof, a high-voltage connector 3 fixed on the other side thereof, and a limit switch 12 fixed on the inner wall of the bushing 2;

[0025] Movable rod 4, the movable rod 4 coincides with the inner wall of the sleeve 2, a grounding wire 5 is fixed on the side of the movable rod 4 away from the sleeve 2, a connecting wire 6 is fixed inside the movable rod 4, a No. 1 connector 8 is fixed on the side of the movable rod 4 close to the sleeve 2, a No. 2 connector 9 is fixed in the middle of the movable rod 4, the grounding wire 5 is directly connected to the No. 2 connector 9 through the connecting wire 6, the grounding wire 5 is connected to the No. 1 connector 8 after being connected in series with the high-voltage resistor 7 through the connecting wire 6, a guide groove is opened on the inner wall of the sleeve 2 to match the No. 1 connector 8 and the No. 2 connector 9, one end of the high-voltage connector 3 is located in the guide groove, and the movable rod 4 is filled with silicone;

[0026] The electric push rod 10 has a lifting motor 11 at one end thereof for driving the electric push rod 10 to extend and retract. The movable end of the electric push rod 10 is fixedly connected to one end of the movable rod 4, and the lifting motor 11 is connected to the control circuit.

[0027] The control circuit includes timer U1, timer U2, local control connector DS1, external control connector DS5, time circuit connector J3, transformer connector J4, relay JK1, relay JK2, microphone MK1, several resistors, several capacitors, several diodes and several transistors.

[0028] The signal of pin 6 of timer U1 is connected to pin 1 of local control connector DS1, pin 2 of external control connector DS5 and pin 1 of time circuit connector J3. The signal of pin 4 of timer U1 is connected to pin 2 of local control connector DS1, pin 3 of external control connector DS5, pin 2 of time circuit connector J3 and pin 10 of timer U2. After pin 5 of timer U1 is connected in series with resistor R6 and diode D1, the signal is connected to pins 9 and 13 of relay JK2.

[0029] The signal of pin 1 of relay JK1 is connected to pin 1 of transformer connector J4, the signal of pin 8 of relay JK1 is connected to pin 2 of transformer connector J4, the signal of pin 7 of relay JK1 is connected in series with resistor R17 and then connected to pin 5 of time circuit connector J3, the signal of pin 7 of relay JK1 is connected in series with resistor R12 and then connected to pins 9 and 10 of local control connector DS1.

[0030] Pins 10 and 11 of relay JK2 are connected to a 12V switching power supply, pin 5 of relay JK2 is connected in series to the limit switch 12 and the normally closed contact of relay JK1 and then to ground, pins 3 and 4 of relay JK2 are connected to both ends of the lifting motor 11, and pin 9 of relay JK2 is connected in series to the discharge button S1 and then to pin 5.

[0031] In this embodiment, Figure 4 The start and reset of the DC withstand voltage tester are controlled by the local control connector DS1 and the external control connector DS5. The time circuit connector J3 is connected to the time control circuit, and the transformer connector J4 outputs the high voltage transformer primary winding. The high voltage output is introduced into the high voltage connector 3. When the instrument is reset, press Figure 4Discharge button S1 is in the middle. When the discharge button S1 is closed, the relay JK2 coil is energized and self-locked through pins 5 and 9. Diode D2 pulls down the base potential of transistor Q3 to ensure that relay JK1 cannot be attracted. Pins 6 and 10 of relay JK2 are connected, the discharge indicator D3 lights up, and pins 7, 11 and pins 8 and 12 of relay JK2 are connected. The voltage is applied to the coil of the lifting motor 11 through resistor R20. The lifting motor 11 controls the electric push rod 10 to slowly extend in the forward direction. First, connector 8 contacts the high-voltage connector 3, and the high voltage is slowly discharged to the ground through the internal high-voltage resistor 7. After the electric push rod 10 continues to extend, connector 9 connects to the high-voltage connector 3, and a short-circuit discharge is performed. At this time, the front end of the movable rod 4 just hits the limit switch 12, causing the normally closed point of the limit switch 12 to be disconnected, the relay JK2 coil loses power, the discharge indicator D3 goes out, and the No. 3 and No. 11 pins and No. 4 and No. 12 pins of the relay JK2 are connected. The lifting motor 11 receives the reverse voltage and reverses to return the electric push rod 10 to reset, completing the entire discharge process. During the instrument startup process, the relay JK1 is energized. Figure 4 The normally closed points of the ⑤ part are disconnected. At this time, even if the discharge button S1 is pressed, the relay JK2 coil will not be energized. Therefore, the instrument can only discharge when it is in the reset state, ensuring the safety and reliability of the entire discharge process.

[0032] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0033] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. One-button discharge device for DC withstand voltage tester, characterized by: include: A sleeve (2), wherein a mounting seat (1) is fixed on one side of the sleeve (2), a high-voltage connector (3) is fixed on the other side of the sleeve (2), and a limit switch (12) is fixed on the inner wall of the sleeve (2); A movable rod (4), wherein the movable rod (4) is matched with the inner wall of the sleeve (2), a grounding wire (5) is fixed on the side of the movable rod (4) away from the sleeve (2), a connecting wire (6) is fixed inside the movable rod (4), a No. 1 connector (8) is fixed on the side of the movable rod (4) close to the sleeve (2), a No. 2 connector (9) is fixed in the middle of the movable rod (4), the grounding wire (5) is directly connected to the No. 2 connector (9) through the connecting wire (6), the grounding wire (5) is connected to the No. 1 connector (8) after being connected in series with a high-voltage resistor (7) through the connecting wire (6), a guide groove matching the No. 1 connector (8) and the No. 2 connector (9) is opened on the inner wall of the sleeve (2), one end of the high-voltage connector (3) is located in the guide groove, and the movable rod (4) is filled with silica gel; An electric push rod (10) is provided at one end thereof with a lifting motor (11) for driving the electric push rod (10) to extend and retract. The movable end of the electric push rod (10) is fixedly connected to one end of the movable rod (4). The lifting motor (11) is connected to a control circuit.

2. The one-button discharge device for a DC withstand voltage tester according to claim 1, characterized in that: The control circuit includes a timer U1, a timer U2, a local control connector DS1, an external control connector DS5, a time circuit connector J3, a transformer connector J4, a relay JK1, a relay JK2, a microphone MK1, a plurality of resistors, a plurality of capacitors, a plurality of diodes and a plurality of transistors.

3. The one-button discharge device for a DC withstand voltage tester according to claim 2, characterized in that: The signal of pin 6 of the timer U1 is connected to pin 1 of the local control connector DS1, pin 2 of the external control connector DS5 and pin 1 of the time circuit connector J3. The signal of pin 4 of the timer U1 is connected to pin 2 of the local control connector DS1, pin 3 of the external control connector DS5, pin 2 of the time circuit connector J3 and pin 10 of the timer U2. The signal of pin 5 of the timer U1 is connected in series with resistor R6 and diode D1, and then connected to pins 9 and 13 of the relay JK2.

4. The one-button discharge device for a DC withstand voltage tester according to claim 3, characterized in that: The signal of pin 1 of the relay JK1 is connected to pin 1 of the transformer connector J4, the signal of pin 8 of the relay JK1 is connected to pin 2 of the transformer connector J4, the signal of pin 7 of the relay JK1 is connected in series with resistor R17 and then connected to pin 5 of the time circuit connector J3, the signal of pin 7 of the relay JK1 is connected in series with resistor R12 and then connected to pins 9 and 10 of the local control connector DS1.

5. The one-button discharge device for a DC withstand voltage tester according to claim 4, characterized in that: Pins 10 and 11 of the relay JK2 are connected to a 12V switching power supply, pin 5 of the relay JK2 is connected in series to a limit switch (12) and the normally closed contact of the relay JK1 and then to ground, pins 3 and 4 of the relay JK2 are connected to both ends of the lifting motor (11), and pin 9 of the relay JK2 is connected in series to a discharge button S1 and then to pin 5.

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