Intelligent zinc oxide arrester leakage current acquisition device

Abstract

The utility model discloses an intelligent zinc oxide lightning arrester leakage current acquisition device, which comprises a box body, a tester main body is arranged in the box body in a penetrating manner, the middle part of the inner wall of the box body is rotatably connected with a bidirectional lead screw, one end of the bidirectional lead screw is fixedly provided with a knob, and two sides of the outer wall of the bidirectional lead screw are in threaded connection with threaded sleeves. A first connecting lug is fixedly arranged at the top end of each threaded sleeve, two second connecting lugs are fixedly arranged in the middle of the bottom end of the tester body, and a connecting rod is rotationally connected between each first connecting lug and the corresponding second connecting lug. According to the utility model, the tester main body in the box body is connected with the threaded column, the threaded column is in threaded connection with the support, the bidirectional lead screw rotationally connected in the box body is in threaded connection with the threaded sleeve, and the connecting rod is rotationally connected between the first connecting lug and the second connecting lug which are connected with the threaded sleeve. And the tester main body can be lifted from the box body, so that the operation of personnel is facilitated, and the use is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to zinc oxide lightning arrester detection equipment technical field, concretely is a kind of intelligent zinc oxide lightning arrester leakage current acquisition device. BACKGROUND

[0002] Zinc oxide lightning arrester is lightning arrester with good protection performance. Utilize the good non-linear volt-ampere characteristic of zinc oxide, make the current that flows through lightning arrester when normal operating voltage is extremely small (microampere or milliamper level);When overvoltage acts, resistance sharply drops, discharges the energy of overvoltage, reaches the effect of protection. The difference between this lightning arrester and traditional lightning arrester is that it has no discharge gap, and uses the non-linear characteristic of zinc oxide to discharge and break. Zinc oxide lightning arrester resistance current tester is suitable for the live or power-off detection of zinc oxide lightning arrester of various voltage grades, and timely discovers the dangerous defects such as internal insulation of equipment damp and valve piece aging.

[0003] And existing zinc oxide lightning arrester resistance current tester when using, equipment main body is placed in box and carries and uses, personnel is difficult to remove equipment main body, lead to personnel's overhauling or maintenance of equipment main body is inconvenient, influence personnel's normal use. CONTENT OF UTILITY MODEL

[0004] In order to solve above problem, the utility model aims at providing a kind of intelligent zinc oxide lightning arrester leakage current acquisition device to solve the problems raised in the above background art.

[0005] To achieve the above object, the utility model provides a kind of intelligent zinc oxide lightning arrester leakage current acquisition device, including box, test instrument main body is arranged in the box;

[0006] The middle part of the inner wall of the box is rotatably connected with a bidirectional screw rod, one end of the bidirectional screw rod is fixedly provided with a knob, the outer wall of the bidirectional screw rod is rotatably connected with a threaded sleeve on both sides, the top end of each threaded sleeve is fixedly provided with a first connecting lug, the middle part of the bottom end of the test instrument main body is fixedly provided with two second connecting lugs, a connecting rod is rotatably connected between each first connecting lug and corresponding second connecting lug, a high-precision current sensor, an I / V transimpedance amplification circuit, a microcontroller MCU, an electro-optical converter and a photoelectric converter are integrated in the test instrument main body, the high-precision current sensor is electrically connected with the I / V transimpedance amplification circuit, the I / V transimpedance amplification circuit is electrically connected with the microcontroller MCU, the microcontroller MCU is electrically connected with the electro-optical converter, the electro-optical converter is electrically connected with the photoelectric converter, and the photoelectric converter is electrically connected with an external central control computer.

[0007] As a preferred technical scheme of the utility model, the four corners of the bottom end of the tester main body are fixedly provided with threaded columns, the four corners of the bottom end of the box body are provided with movable holes, threaded columns are inserted into each movable hole, and the bottom end of each threaded column is threadedly connected with a support.

[0008] As a preferred technical scheme of the utility model, the bottom end of the inner wall of the box body is provided with a limiting sliding groove, two limiting sliding blocks are slidably connected in the limiting sliding groove, and the top end of each limiting sliding block is fixedly connected with the bottom end of a corresponding threaded sleeve.

[0009] As a preferred technical scheme of the utility model, one side of the box body is hingedly connected with a box cover, and the two sides of the inner wall of the box cover are fixedly provided with U-shaped butt joints.

[0010] As a preferred technical scheme of the utility model, butt strips are inserted into each U-shaped butt joint, and sponge protection blocks are fixedly arranged between the two butt strips.

[0011] As a preferred technical scheme of the utility model, the two sides of the top end of the box cover are fixedly provided with hooks, the two ends of the other side of the box body are fixedly provided with movable buckles, and the middle part of the other side of the box body is fixedly provided with a handle.

[0012] The intelligent zinc oxide lightning arrester leakage current acquisition device can bring the following beneficial effects.

[0013] 1. The intelligent zinc oxide lightning arrester leakage current acquisition device, the tester main body in the box body is connected with a threaded column, the threaded column is threadedly connected with a support, the bidirectional lead screw rotatably connected in the box body is threadedly connected with a threaded sleeve, and the first connecting lug and the second connecting lug connected with the threaded sleeve are rotatably connected with a connecting rod.

[0014] 2. The intelligent zinc oxide lightning arrester leakage current acquisition device, the box body is hingedly connected with a box cover, butt strips are inserted into the U-shaped butt joints connected with the box cover, and the butt strips are connected with sponge protection blocks. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. In the drawings:

[0016] Fig. 1 The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. In the drawings:

[0017] Fig. 2 It is the internal structure schematic view of the utility model;

[0018] Fig. 3 It is the connecting structure schematic view of the utility model box body;

[0019] Fig. 4 It is the module schematic view of the utility model tester main body.

[0020] In the drawing: 1, box body;2, tester main body;201, high-precision current sensor;202, I / V transimpedance amplifier circuit;203, microcontroller MCU;204, electro-optical converter;205, photoelectric converter;3, box cover;4, hook;5, U-shaped butt joint;6, butt joint strip;7, sponge protection block;8, movable buckle;9, handle;10, threaded column;11, support;12, knob;13, bidirectional screw;14, threaded sleeve;15, first connecting lug;16, second connecting lug;17, connecting rod;18, limiting sliding groove;19, limiting sliding block. DETAILED DESCRIPTION

[0021] In order to more clearly explain the overall concept of the utility model, the following detailed description is made in an exemplary manner in conjunction with the attached drawings of the specification.

[0022] As Figs. 1-4 Indicated, the embodiment of the utility model proposes a kind of intelligent zinc oxide arrester leakage current acquisition device, including box body 1, tester main body 2 is arranged in box body 1, it is characterized in that:

[0023] The middle part of the inner wall of the box body 1 is rotationally connected with a bidirectional screw rod 13, one end of the bidirectional screw rod 13 is fixedly provided with a knob 12, the outer wall of the bidirectional screw rod 13 is threadedly connected with a threaded sleeve 14 on both sides, the top end of each threaded sleeve 14 is fixedly provided with a first connecting lug 15, the middle part of the bottom end of the tester main body 2 is fixedly provided with two second connecting lugs 16, a connecting rod 17 is rotationally connected between each first connecting lug 15 and the corresponding second connecting lug 16, the tester main body 2 is integrated with a high-precision current sensor 201, an I / V transimpedance amplification circuit 202, a microcontroller MCU 203, an electro-optical converter 204 and an opto-electric converter 205, the high-precision current sensor 201 is electrically connected with the I / V transimpedance amplification circuit 202, the I / V transimpedance amplification circuit 202 is electrically connected with the microcontroller MCU 203, the microcontroller MCU 203 is electrically connected with the electro-optical converter 204, the electro-optical converter 204 is electrically connected with the opto-electric converter 205, the opto-electric converter 205 is electrically connected with an external central control computer, the four corners of the bottom end of the tester main body 2 are fixedly provided with threaded columns 10, the four corners of the bottom end of the box body 1 are provided with movable holes, the threaded columns 10 are inserted into each movable hole, the bottom end of each threaded column 10 is threadedly connected with a support 11, a limiting sliding groove 18 is formed in the bottom end of the inner wall of the box body 1, two limiting sliding blocks 19 are slidingly connected in the limiting sliding groove 18, and the top end of each limiting sliding block 19 is fixedly connected with the bottom end of the corresponding threaded sleeve 14.

[0024] One side of the box body 1 is hingedly connected with a box cover 3, the inner wall of the box cover 3 is fixedly provided with U-shaped butt joints 5 on both sides, the butt joint 5 is inserted with a butt joint strip 6, the two butt joint strips 6 are fixedly provided with sponge protection blocks 7, the two sides of the top end of the box cover 3 are fixedly provided with hooks 4, the two ends of the other side of the box body 1 are fixedly provided with movable buckles 8, and the middle part of the other side of the box body 1 is fixedly provided with a handle 9.

[0025] The leakage current of the zinc oxide arrester under normal state is extremely small, generally in the order of microampere (μA), and considering the convenience of installation of the high-precision current sensor 201 in the power system, the high-precision current sensor 201 adopts an open-close type zero-magnetic flux high-precision current sensor, the maximum resolution of the high-precision current sensor 201 can reach 1 μA, the accuracy level is 0.5 level, the input current is 0.000 mA-10 A AC, and the phase error is less than 1°, which can completely meet the measurement and collection requirements of the leakage current of the zinc oxide arrester;

[0026] The current signal from the MOA high-precision current sensor is extremely weak, and the output impedance is high, so the current signal is converted into a voltage signal with a larger amplitude by the I / V transimpedance amplification circuit 202, so as to facilitate subsequent signal acquisition and processing, the circuit is constructed with a low-noise operational amplifier TLC2201 as the core, realizing the conversion of the MOA leakage current signal to the voltage signal, the minimum input current can reach 1pA, and the common-mode rejection ratio is very high, laying a foundation for subsequent leakage current acquisition.

[0027] As an intelligent MOA leakage current acquisition device, the intelligent function is mainly realized by the microcontroller MCU. The microcontroller MCU 203 takes the STM32 single-chip microcomputer as the core, can realize the digital conversion and intelligent processing of the MOA leakage current, can also extract the resistive current component in the MOA leakage current for representing the MOA running state, and perform intelligent evaluation of the MOA running state, finally, the resistive current data or the MOA running state data is transmitted to the central control computer through subsequent photoelectric conversion and transmission device, in addition, the device can also simultaneously acquire the environmental temperature and humidity data of the MOA installation position, together with the resistive current data, the MOA running state and the time data, to provide effective reference basis for subsequent effective evaluation of the MOA running state;

[0028] For the safety of the equipment and the operating personnel, an electro-optical converter 204 is used to convert the electrical signal into an optical signal for transmission, that is, all the data processed by the microcontroller MCU 203, including the leakage current, the resistive current data, the MOA running state, and the temperature, humidity and time data, are converted into optical signals for long-distance transmission, and then the optical signals are restored into electrical signals by the photoelectric converter 205 when reaching the central control room, and finally the electrical signals are sent to the central control computer, completing the safe and stable transmission of the data

[0029] Working principle: when the acquisition device is used, if the test instrument main body 2 needs to be overhauled or maintained, the personnel rotates the knob 12 to drive the bidirectional lead screw 13, and then drives the two threaded sleeves 14 to approach, the limiting sliding block 19 connected with the threaded sleeve 14 slides in the limiting sliding groove 18 opened in the box body 1, the threaded sleeve 14 drives the first connecting lug 15, the first connecting lug 15 and the second connecting lug 16 are rotationally connected with the connecting rod 17, with the approach of the threaded sleeve 14, the test instrument main body 2 is lifted from the box body 1, facilitating the operation of the personnel.

[0030] The above merely describes the embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. An intelligent zinc oxide arrester leakage current acquisition device, comprising a box (1), a tester body (2) is inserted in the box (1), characterized in that: A bidirectional screw rod (13) is rotatably connected to the middle of the inner wall of the box (1), one end of the bidirectional screw rod (13) is fixedly provided with a knob (12), the outer wall of the bidirectional screw rod (13) is threadedly connected with a threaded sleeve (14) on both sides, the top end of each threaded sleeve (14) is fixedly provided with a first connecting lug (15), the middle of the bottom end of the tester body (2) is fixedly provided with two second connecting lugs (16), a connecting rod (17) is rotatably connected between each first connecting lug (15) and the corresponding second connecting lug (16), a high-precision current sensor (201), an I / V transimpedance amplification circuit (202), a microcontroller MCU (203), an electro-optical converter (204) and an optoelectronic converter (205) are integrated in the tester body (2), the high-precision current sensor (201) is electrically connected with the I / V transimpedance amplification circuit (202), the I / V transimpedance amplification circuit (202) is electrically connected with the microcontroller MCU (203), the microcontroller MCU (203) is electrically connected with the electro-optical converter (204), the electro-optical converter (204) is electrically connected with the optoelectronic converter (205), and the optoelectronic converter (205) is electrically connected with an external central control computer.

2. The intelligent zinc oxide surge arrester leakage current acquisition device according to claim 1, characterized in that: Threaded columns (10) are fixedly arranged at the four corners of the bottom end of the tester body (2), movable holes are formed at the four corners of the bottom end of the box (1), threaded columns (10) are inserted into each movable hole, and the bottom end of each threaded column (10) is threadedly connected with a support (11).

3. The intelligent zinc oxide surge arrester leakage current acquisition device according to claim 1, characterized in that: A limiting sliding groove (18) is formed in the bottom end of the inner wall of the box (1), two limiting sliding blocks (19) are slidably connected in the limiting sliding groove (18), and the top end of each limiting sliding block (19) is fixedly connected with the bottom end of the corresponding threaded sleeve (14).

4. The intelligent zinc oxide surge arrester leakage current acquisition device of claim 1, wherein: A box cover (3) is hingedly connected to one side of the box (1), and U-shaped butt joints (5) are fixedly arranged on the inner wall of the box cover (3) on both sides.

5. The intelligent zinc oxide surge arrester leakage current acquisition device of claim 4, wherein: Butt strips (6) are inserted into each U-shaped butt joint (5), and a sponge protection block (7) is fixedly arranged between the two butt strips (6).

6. The intelligent zinc oxide surge arrester leakage current acquisition device of claim 4, wherein: Hooks (4) are fixedly arranged on both sides of the top end of the box cover (3), movable buckles (8) are fixedly arranged at both ends of the other side of the box (1), and a handle (9) is fixedly arranged in the middle of the other side of the box (1).

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