Outdoor enclosed ejection fuse insulation lead vibration tester

Abstract

The present invention belongs to the technical field of power distribution and electrical appliance product detection, and specifically relates to an outdoor enclosed ejection-type fuse insulation lead vibration test, which provides data support for ensuring the quality of fuse products. The present invention is that the power supply is connected to the touch screen, PLC controller, frequency modulation circuit and drive motor through lines respectively; the touch screen is connected to the PLC controller, frequency modulation circuit and drive motor through RS85 communication; the touch screen is connected to the host computer through lines. The present invention is an insulation lead vibration tester based on touch screen control, which is developed for the requirements of 10kV outdoor enclosed fuse insulation lead vibration test. It has a simple structure, reasonable design, flexible and fast parameter setting, easy installation and reliable operation. The present invention can avoid internal contamination, has a higher insulation level, and more stable and reliable performance.

Description

Technical Field

[0001] The invention belongs to the technical field of power distribution electrical appliance product detection, and specifically relates to a vibration test of an insulated lead of an outdoor enclosed ejection type fuse, providing data support for ensuring the quality of fuse products. Background Art

[0002] Ejector fuses are widely used as overcurrent protection devices on the high-voltage side of 10kV overhead distribution transformers. Drop-out fuses have simple structure, low cost, and wide application range, and are currently widely used in China. However, this type of fuse has disadvantages such as exposed contacts, easy flashover, easy to fall off, and certain dangers in the pulling and closing operation. The enclosed type fuse was first widely used in Japan due to its closed structure to avoid internal contamination, higher insulation level, and more stable and reliable performance, and has been introduced into China in recent years. Since manufacturers and this type of fuse have little experience in grid operation, it is necessary to improve the various type tests of this type of fuse to provide technical references for manufacturers and related operation and maintenance units. Summary of the invention

[0003] In view of the problems existing in the above-mentioned prior art, the present invention proposes an outdoor enclosed ejection fuse insulation lead vibration tester, which is an insulation lead vibration tester based on touch screen control and is aimed at the insulation lead vibration test requirements of 10kV outdoor enclosed fuses. It has a simple structure, reasonable design, flexible and fast parameter setting, easy installation and reliable operation.

[0004] Based on the above invention objectives, the present invention is achieved through the following technical solutions:

[0005] An outdoor enclosed ejection fuse insulation lead vibration tester, wherein the power supply is connected to the touch screen on the control cabinet, the PLC controller and the frequency modulation circuit in the control cabinet and the drive motor through lines; the touch screen is connected to the PLC controller through RS485 communication; one end of the transmission mechanism is connected to the drive motor, and the other end of the transmission mechanism is connected to the drive point.

[0006] The driving point is connected with a pressure sensor, and the insulating lead on the test piece passes through the driving point equipped with the pressure sensor; the analog end lead at the other end of the insulating lead is connected with a weight.

[0007] The driving motor is connected to gear B through a crank, gear B is connected to the inner track of gear A, a slider is connected to gear B, and the slider is arranged in the slideway for reciprocating motion; the slideway and the driving rod are vertically connected; the insulating lead on the test piece passes through the driving point, and the driving point is connected to the driving rod.

[0008] An equipment status indicator light is also installed on the panel of the control cabinet, and a host computer software system is embedded in the touch screen.

[0009] The host computer software system is equipped with a counting module, and the counted vibration frequency / min and the number of vibrations are displayed through the touch screen; when the set number of times is reached or the device fails, the test is automatically stopped, and the touch screen on the panel displays the end of the test or fault information.

[0010] The device status indicator lights include run, stop and fault.

[0011] The touch screen is a Kunlun touch screen.

[0012] The power sources include AC 380V, 220V and DC 24V.

[0013] The 380V AC power supply is connected to the input end of the frequency modulation circuit through the AC circuit breaker QF1, the current limiting fuse and the bushing CT, and the output end of the frequency modulation circuit is connected to the drive motor through the current limiting inductor and the contactor; the power supply voltage is connected to the PLC controller, and the loop current is connected to the PLC controller; the AC 220V is connected to the test instrument control circuit and the indicator light through the AC circuit breaker QF2; the AC 220V outputs DC 24V through the AC / DC conversion module; the DC 24V power supply is connected to the PLC controller, the pressure sensor and the touch screen through the DC circuit breaker DK1; the PLC controller connects to the frequency modulation circuit by outputting 4-20mA: AI1, AI2, and then controls the motor frequency; at the same time, the frequency modulation circuit outputs 4-20mA: AO1, AO2 connected to the PLC controller as the frequency feedback of the motor.

[0014] The 380V AC power supplies L11, L21, and L31 are connected to the frequency modulation circuit input terminals A, B, and C through the AC circuit breaker QF1, the current limiting fuse, and the bushing CT. The frequency modulation circuit output terminals a, b, and c are connected to the drive motor through the current limiting reactor and the contactor; the power supply voltage A601 and N are connected to the PLC controller L and N terminals, and the loop current B401 and N401 are connected to the PLC controller S1 and S2 terminals.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial technical effects:

[0016] The present invention is an insulated lead vibration tester based on touch screen control, which is developed for the requirements of 10kV outdoor enclosed fuse insulated lead vibration test. It has simple structure, reasonable design, flexible and fast parameter setting, convenient device installation and reliable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention, wherein the drawings are only used to illustrate some embodiments of the present invention, but not to limit all embodiments of the present invention thereto.

[0018] Figure 1This is a schematic diagram of the control structure of the vibration tester of the present invention;

[0019] Figure 2-1 This is the electrical control principle diagram of the vibration tester of the present invention;

[0020] Figure 2-2 This is a layout diagram of the insulated lead vibration test of the present invention;

[0021] Figure 3 This is a schematic diagram of the overall structure of the present invention in use;

[0022] Figure 4 It is a schematic diagram of the transmission mechanism of the present invention;

[0023] Figure 5 It is a schematic diagram of the driving point structure in the present invention;

[0024] Figure 6 It is a structural schematic diagram of the fixed point A in the present invention.

[0025] In the figure: control cabinet 1, drive motor 2, transmission mechanism 3, drive point 4, test platform 5, fixed point A6, fixed point B7, test piece 8, drive rod 9, insulated lead 10, slider 11, slideway 12, crank 13, gear A 14, gear B 15, weight 16, pressure sensor 17, threading point 18, clamp 19. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings, but is not limited to the embodiments.

[0027] Example 1

[0028] The present invention is an outdoor enclosed jet-type fuse insulation lead vibration tester, which includes a hardware system and a host computer software system. The hardware system includes:

[0029] Power supply AC / DC, frequency modulation circuit, PLC controller, drive motor 2, transmission mechanism 3, pressure sensor, touch screen, RS485 communication, equipment status indicator light and current transformer. Figure 1 As shown. The power supply AC / DC is connected to the touch screen, PLC controller, frequency modulation circuit and drive motor 2 through lines; the touch screen is connected to the PLC controller, frequency modulation circuit and drive motor through RS485 communication, and the upper computer software system is embedded in the touch screen. The PLC controller controls the frequency modulation circuit and then controls the motor frequency.

[0030] like Figure 3 As shown, Figure 3This is a schematic diagram of the overall structure of the present invention in use, i.e., a layout diagram of the insulated lead vibration test. It includes a control cabinet 1, a drive motor 2, and a test platform 5. A touch screen and a device status indicator light are installed on the panel of the control cabinet 1, a PLC controller and a frequency modulation circuit are installed in the control cabinet, and the drive motor is installed at the bottom of the test platform. The drive motor and the frequency modulation circuit are connected by a cable. The power supply is connected to the touch screen, the PLC controller, the frequency modulation circuit, and the drive motor through the lines; the touch screen is connected to the PLC controller, the frequency modulation circuit, and the drive motor through RS485 communication.

[0031] The equipment status indicator lights on the control cabinet panel include running, i.e., red light; stopping, i.e., green light; and fault, i.e., yellow light. Through the control of the intermediate relay, the frequency modulation circuit feeds back the motor status DO1-DO3 to the PLC controller. The PLC controller uploads the equipment status information to the touch screen through communication. The touch screen described in the present invention adopts the Kunlun Tongtai touch screen, and the touch screen and the PLC controller use RS485 communication technology to exchange data. The parameters or instructions on the touch screen are transmitted to the PLC controller through RS485 communication, and the PLC controller controls the frequency modulation circuit and then controls the operation and stop of the drive motor. The red light is on when the equipment is running, and the green light is on when it stops. The use of a touch screen can not only reduce the overall volume of the tester, but also make parameter setting more convenient and flexible. The vibration frequency / min and the number of vibrations can be set on the control panel, and the device can also realize the counting function through the counting module in the upper computer software. When the set number of times is reached or the device fails, the test is automatically stopped, and the panel displays the end of the test or fault information.

[0032] like Figure 2-1 , Figure 2-2As shown, it is the electrical control principle diagram of the vibration tester of the present invention and the layout diagram of the insulated lead vibration test, that is, the electrical primary and secondary principle diagrams of the vibration tester. The power supply AC / DC includes AC 380V, 220V and DC 24V. The 380V AC power supply L11, L21, L31 is connected to the input terminals A, B, and C of the frequency modulation circuit through the AC circuit breaker QF1, the current limiting fuse, and the bushing CT, and the output terminals a, b, and c of the frequency modulation circuit are connected to the drive motor through the current limiting reactor and the contactor. The power supply voltage A601 and N are connected to the L and N terminals of the PLC controller, and the loop current B401 and N401 are connected to the S1 and S2 terminals of the PLC controller. The AC 220V provides power for the control circuit and the indicator light of the tester through the AC circuit breaker QF2. The AC 220V outputs DC 24V through the AC / DC conversion module, and the DC 24V power supply is supplied to the intermediate repeater KA1, the intermediate repeater KA2, the intermediate repeater KA3, the pressure sensor and the touch screen through the DC circuit breaker DK1. The PLC controller controls the motor frequency by outputting 4-20mA: AI1, AI2 to the frequency modulation circuit. At the same time, the frequency modulation circuit outputs 4-20mA: AO1, AO2 to the PLC controller as the motor frequency feedback.

[0033] like Figure 4 As shown, Figure 4 It is a schematic diagram of the transmission mechanism of the present invention. One end of the transmission mechanism 3 is connected to the drive motor 2, and the other end of the transmission mechanism 3 is connected to the drive point 4. A pressure sensor is installed on the drive point 4, and the pressure sensor converts the pressure into a 4-20mA analog quantity and feeds it back to the PLC controller in the control cabinet 1. When the collected pressure value is less than the set value, the device of the present invention determines that the insulating lead on the fuse test piece is broken, or when the motor is overcurrent, the device of the present invention determines that the motor is faulty. At this time, the vibration meter automatically stops the test, the fault light turns yellow, and the buzzer sends an alarm signal. By adjusting the vertical distance between the drive point 4 and the slide 12, the amplitude of the tester can be adjusted to meet the test requirements of fuses with different parameters.

[0034] like Figure 5 As shown, Figure 5 The driving point structure schematic diagram of the present invention. The driving point 4 is a three-way structure, and a pressure sensor 17 is connected to the inside. During the test, the insulating lead 10 is passed through the threading point 18 on the driving point 4 and then hung with a weight 16. The insulating lead generates a certain pressure on the pressure sensor. When the pressure detected is less than the set value, it is determined that the insulating lead is broken.

[0035] The driving motor 2 drives the gear B15 to rotate along the track of the gear A14 through the crank 13. During the movement of the gear B15, the slider 11 connected to the gear B15 reciprocates in the slideway 12; the slideway 12 and the driving rod 9 are vertically fixedly connected. The insulated lead wire 10 on the enclosed fuse passes through the driving point 4 equipped with the pressure sensor, and the driving point 4 and the insulated lead wire 10 are driven by the driving rod 9 to reciprocate. By adjusting the vertical distance between the driving point 4 and the slideway 12, the amplitude of the tester can be adjusted.

[0036] Example 2

[0037] The present invention takes a certain type of enclosed fuse as an example, and combines the attached Figure 3 Explain the specific implementation steps:

[0038] 1: Fuse fixed. Figure 3 The fuse test piece 8 is fixedly installed at the fixing point A6, and the fixing point A6 can be adjusted according to different test piece sizes of the fuse.

[0039] like Figure 6 As shown, Figure 6 The fixing point A6 is a clamp structure. During the test, the test piece 8 is installed in two corresponding clamps 19, and the size of the clamp is adjusted by bolts at both ends of the clamp.

[0040] 2: Insulated lead installation. The insulated lead 10 on the fuse test piece 8 is passed through the driving point 4 equipped with the pressure sensor. The insulated lead can be well fixed at the driving point 4 so that the distance between the driving point and the end of the insulated lead 10 on the fuse test piece 8 remains unchanged during the test.

[0041] 3: The insulated lead wire 10 is loaded. The fixed point B7 can bear a maximum load of 10kg to meet the test requirements. According to the standard requirements, a certain weight 16 is hung on the other end of the insulated lead wire to simulate the end lead wire load.

[0042] 4: Amplitude adjustment. Adjust the transmission mechanism arm so that the amplitude of the driving point meets the standard requirements.

[0043] 5: Test parameter setting. The AC power circuit breakers QF1 and QF2 and the DC 24V power circuit breaker DK1 of the vibration tester of the present invention are closed, the vibration tester of the present invention is energized, and the motor vibration frequency and vibration times are set on the touch screen.

[0044] 6: Vibration test. Click the start button SG1 on the touch screen, and the instructions and parameters are transmitted to the PLC controller through the RS485 communication interface. The PLC controller controls the frequency modulation circuit and then drives the motor to run according to the set program. The running indicator light (red light) is on, and the screen displays the real-time pressure and vibration times of the pressure sensor. When the vibration times are reached, the device automatically stops the test, the stop indicator light (green light) is on, and the test personnel are informed of the end of the test in the form of sound.

[0045] If during the test, the vibration tester of the present invention has a motor overcurrent or the pressure sensor cannot detect pressure, the vibration tester of the present invention automatically stops running, the fault light (yellow light) turns on, and an audible alarm is issued that is different from the end of a normal test, so as to notify the test personnel to handle it as soon as possible.

[0046] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure, including the claims, is limited to these examples; within the spirit of the present invention, the technical features in the above embodiments or in different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0047] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Outdoor enclosed ejection type fuse insulation lead vibration tester, its characteristics are: The power supply is connected to the touch screen on the control cabinet, the PLC controller and the frequency modulation circuit in the control cabinet and the drive motor through the lines; the touch screen is connected to the PLC controller through RS485 communication; one end of the transmission mechanism is connected to the drive motor, and the other end of the transmission mechanism is connected to the drive point; the drive point is connected to a pressure sensor, and the insulated lead on the test piece passes through the drive point equipped with the pressure sensor; the analog end lead at the other end of the insulated lead is connected to a weight; the drive motor is connected to gear B through a crank, gear B is connected to the track inside gear A, and a slider is connected to gear B, and the slider is arranged in the slideway for reciprocating motion; the slideway and the drive rod are vertically connected; the insulated lead on the test piece passes through the drive point, and the drive point is connected to the drive rod; the power supply includes AC 380V, 22 0V and DC 24V; the 380V AC power supply is connected to the input end of the frequency modulation circuit through the AC circuit breaker QF1, the current limiting fuse, and the bushing CT, and the output end of the frequency modulation circuit is connected to the drive motor through the current limiting reactor and the contactor; the power supply voltage is connected to the PLC controller, and the loop current is connected to the PLC controller; the AC 220V is connected to the test instrument control circuit and the indicator light through the AC circuit breaker QF2; the AC 220V outputs DC 24V through the AC / DC conversion module; the DC 24V power supply is connected to the PLC controller, the pressure sensor and the touch screen through the DC circuit breaker DK1; the PLC controller connects to the frequency modulation circuit by outputting 4-20mA: AI1, AI2, and then controls the motor frequency; at the same time, the frequency modulation circuit outputs 4-20mA: AO1, AO2 Connect to the PLC controller as the frequency feedback of the motor; the 380V AC power supply L11, L21, L31 is connected to the frequency modulation circuit input terminals A, B, C through the AC circuit breaker QF1, the current limiting fuse, and the bushing CT, and the frequency modulation circuit output terminals a, b, c are connected to the drive motor through the current limiting reactor and the contactor; the power supply voltage A601, N is connected to the PLC controller L, N terminals, and the loop current B401, N401 is connected to the PLC controller S1, S2 terminals.

2. The outdoor enclosed ejection type fuse insulation lead vibration tester according to claim 1 is characterized in that: An equipment status indicator light is also installed on the panel of the control cabinet, and a host computer software system is embedded in the touch screen.

3. The outdoor enclosed ejection type fuse insulation lead vibration tester according to claim 2 is characterized in that: The host computer software system is equipped with a counting module, and the counted vibration frequency / min and the number of vibrations are displayed through the touch screen; when the set number of times is reached or the device fails, the test is automatically stopped, and the touch screen on the panel displays the end of the test or fault information.

4. The outdoor enclosed ejection type fuse insulation lead vibration tester according to claim 2 is characterized in that: The device status indicator lights include run, stop and fault.

5. The outdoor enclosed ejection type fuse insulation lead vibration tester according to claim 1 is characterized in that: The touch screen is a Kunlun touch screen.

Images