Isolation sphere gap device for closed direct current superposition impact test system

Abstract

The isolation sphere gap device for the closed direct current superposition impact test system comprises an insulation base, and is characterized by further comprising an insulation shell and a driving device, a first mounting plate and a second mounting plate are arranged at two ends of the insulating shell, a first ignition ball is fixed on the first mounting plate, a driving device is arranged outside the second mounting plate, a moving end of the driving device is arranged in the insulating shell, a second ignition ball is arranged at the moving end of the driving device, and the driving device drives the second ignition ball to reciprocate; the first ignition ball and the second ignition ball are both connected with the high-pressure generating device; insulating gas is arranged in the insulating shell, and grading rings are arranged above and below the outside of the insulating shell. According to the utility model, the two ignition balls are arranged in the closed insulating inner shell and are filled with uniform and stable insulating gas at the same time, so that the ignition ball breakdown test is carried out in a stable and consistent environment, and the accuracy of experimental data at each time is ensured.

Description

Technical Field

[0001] This utility model relates to the field of electrical testing equipment technology, and in particular to an isolation ball gap device for a closed DC superimposed impact test system. Background Technology

[0002] A DC superimposed impulse test device is used to test the insulation performance and transient overvoltage tolerance of electrical equipment. This device simulates transient overvoltage conditions that may be encountered in actual operation by applying a stable DC voltage to the equipment under test and superimposing an impulse voltage with specific parameters (such as amplitude and waveform).

[0003] The testing process typically utilizes an isolation ball gap device. Currently, the isolation ball gap device of the DC superimposed impact test system is usually installed in an indoor space, which presents the following technical problems: the isolation ball gap device needs to be built in a stable indoor environment. Although the indoor environment is relatively controllable and stable, due to personnel entering and leaving the space for installation and debugging, the environmental parameters will still change slightly during each experiment, which will affect the accuracy of the test.

[0004] Therefore, there is an urgent need to design an isolation ball gap device for a DC superimposed impact test system with accurate test data. Utility Model Content

[0005] In view of the problems existing in the background technology, this utility model proposes an isolation ball gap device for a closed DC superimposed impact test system, which not only provides accurate test data, but also reduces the floor space and significantly reduces costs.

[0006] The technical solution of this utility model: an isolation ball gap device for a closed DC superimposed impact test system, including an insulating base, an insulating shell, and a driving device;

[0007] The insulating shell has a first mounting plate and a second mounting plate at both ends. A first ignition ball is fixed on the first mounting plate. A driving device is provided outside the second mounting plate. The moving end of the driving device is located inside the insulating shell. A second ignition ball is provided on the moving end of the driving device. The driving device drives the second ignition ball to reciprocate.

[0008] Both the first and second ignition balls are connected to the high-voltage generator.

[0009] The insulating shell contains insulating gas, and the insulating shell has equalizing rings on the top and bottom.

[0010] Preferably, the driving device includes a power unit and a slide rod sealing mechanism. The power unit is located outside the second mounting plate. The slide rod sealing mechanism includes a slide rod and a slide rod bushing. The slide rod bushing is located outside the second mounting plate, and the slide rod is located inside the slide rod bushing. One end of the slide rod is connected to the power unit to perform reciprocating motion. A second ignition ball is provided on the other end of the slide rod, and a dynamic sealing ring is provided on the slide rod.

[0011] Preferably, the sliding rod is provided with a dynamic sealing ring in sequence from the inside to the outside, which is a step seal, a plug seal and a guide ring.

[0012] Preferably, the power unit is fixed to the mounting sleeve, and the mounting sleeve is fixed to the slide rod bushing.

[0013] Preferably, the power device is a stepper motor, and the output end of the stepper motor is connected to the slide rod.

[0014] Preferably, the equalizing ring is mounted on the outside of the insulating shell via a bracket.

[0015] Preferably, the insulating gas is SF6 or nitrogen.

[0016] Preferably, the second mounting plate is provided with an inflation valve.

[0017] Compared with the prior art, this utility model places two ignition balls in a sealed insulating inner shell and fills it with a uniform and stable insulating gas, so that the ignition ball breakdown test is carried out in a stable and consistent environment, ensuring the accuracy of the experimental data for each test. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 for Figure 1 A magnified view of part A in the middle;

[0020] Reference numerals in the attached drawings: 1 is an insulating base, 2 is an insulating shell, 21 is a first mounting plate, 22 is a second mounting plate, 3 is a drive device, 31 is a power device, 32 is a sliding rod sealing mechanism, 321 is a sliding rod, 3211 is a step seal, 3212 is a plug seal, 3213 is a guide ring, 322 is a sliding rod bushing, 4 is a first ignition ball, 5 is a second ignition ball, 6 is an equalizing ring, and 7 is a bracket. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "inner", "outer", "front", "back", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] like Figure 1 and Figure 2 As shown, the closed DC superimposed impact test system uses an isolation ball gap device, which includes an insulating base 1, an insulating shell 2, and a drive device 3.

[0024] The insulating shell 2 has a first mounting plate 21 and a second mounting plate 22 at both ends. A first ignition ball 4 is fixed on the first mounting plate 21. A driving device 3 is provided outside the second mounting plate. The moving end of the driving device 3 is located inside the insulating shell 2. A second ignition ball 5 is provided on the moving end of the driving device 3. The driving device 3 drives the second ignition ball 5 to reciprocate.

[0025] The first ignition ball 4 and the second ignition ball 5 are both connected to the high-voltage generating device. The high-voltage generating device is connected to the first ignition ball 4 and the second ignition ball 5 through cables. How to pass through the mounting plate for connection is a conventional technique and will not be described in detail. Since the second ignition ball 5 is moving, the cable needs to have slack in the insulating shell 2 to allow the second ignition ball 5 to move.

[0026] The insulating outer casing 2 contains an insulating gas; in this embodiment, the insulating gas is SF6. Those skilled in the art may also choose other homogeneous and stable insulating gases.

[0027] The insulating outer shell 2 is provided with equalizing rings 6 on the top and bottom. The equalizing rings 6 can evenly distribute high voltage around the object, ensuring that there is no potential difference between the different parts of the ring, thereby achieving the effect of equalizing voltage.

[0028] The drive device 3 includes a power unit 31 and a slide rod sealing mechanism 32. The power unit 31 is located outside the second mounting plate 22. The slide rod sealing mechanism 32 includes a slide rod 321 and a slide rod bushing 322. The slide rod bushing 322 is fixed to the outside of the second mounting plate 22. The slide rod 321 is located inside the slide rod bushing 322. One end of the slide rod 321 is connected to the power unit 31 and reciprocates. The other end of the slide rod 321 is provided with a second ignition ball 5. The slide rod 321 is provided with a dynamic sealing ring. The slide rod 321 is made of insulating material.

[0029] In this embodiment, the dynamic sealing rings arranged sequentially from the inside to the outside on the slide rod 321 are a step seal 3211, a plug seal 3212, and a guide ring 3213. The dynamic sealing rings are conventional sealing components used for axial sealing to ensure the airtightness between the slide rod 321 and the slide rod bushing 322. The specific structure and installation method will not be described in detail.

[0030] In this embodiment, the power unit 31 is a stepper motor, and the output end of the stepper motor is connected to the slide bar 321. A second ignition ball 5 is provided on the other end of the slide bar 321. The stepper motor capable of reciprocating motion is a conventional device, and its specific structure and working principle will not be described in detail.

[0031] In this embodiment, the equalizing ring 6 is disposed outside the insulating shell 2 via a bracket 7.

[0032] In this embodiment, the second mounting plate 22 is equipped with an inflation valve for filling and releasing insulating gas. The inflation valve has a conventional structure and installation method, which will not be described in detail.

[0033] Usage: Apply a high-voltage impulse voltage to the two ignition balls. Due to the small gap between the balls, rapid breakdown of the gap can be achieved during the build-up period of the impulse voltage. The peak voltage of the impulse voltage should be less than 80% of the excitation voltage of the ball gap when DC combined with voltage.

[0034] Two ignition balls are placed in a sealed, insulated inner shell and filled with a uniform and stable insulating gas. This ensures that the ignition ball breakdown test is conducted in a stable and consistent environment, guaranteeing the accuracy of the experimental data for each test.

[0035] Example 2

[0036] In this embodiment, the stepper motor is battery powered and wirelessly controlled. Given the knowledge of the function, selecting a specific model of stepper motor and corresponding controller is a conventional technique for those skilled in the art, and the specific connection structure and principle will not be described in detail.

[0037] In this embodiment, the entire system is fixed at a high potential with an insulated platform and connected to the control console via wireless transmission. There are no external lines, cables, etc. connected to the ground potential, which can ensure that there will be no flashover with the ground during the pressurization process, thus ensuring the safety of equipment and personnel during the test.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] The above specific embodiments are merely one or more preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An isolation ball gap device for a closed-loop DC superimposed impulse test system, comprising an insulating base, characterized in that: It also includes an insulating housing and a drive unit; The insulating shell has a first mounting plate and a second mounting plate at both ends. A first ignition ball is fixed on the first mounting plate. A driving device is provided outside the second mounting plate. The moving end of the driving device is located inside the insulating shell. A second ignition ball is provided on the moving end of the driving device. The driving device drives the second ignition ball to reciprocate. Both the first and second ignition balls are connected to the high-voltage generator. The insulating shell contains insulating gas, and the insulating shell has equalizing rings on the top and bottom.

2. The isolation ball gap device for the closed DC superimposed impact test system according to claim 1, characterized in that, The driving device includes a power unit and a slide rod sealing mechanism. The power unit is located outside the second mounting plate. The slide rod sealing mechanism includes a slide rod and a slide rod bushing. The slide rod bushing is located outside the second mounting plate, and the slide rod is located inside the slide rod bushing. One end of the slide rod is connected to the power unit and performs reciprocating motion. A second ignition ball is provided on the other end of the slide rod, and several dynamic sealing rings are provided on the slide rod.

3. The isolation ball gap device for the closed DC superimposed impact test system according to claim 2, characterized in that, The sliding rod is provided with dynamic sealing rings in sequence from the inside to the outside, namely a step seal, a plug seal, and a guide ring.

4. The isolation ball gap device for the closed DC superimposed impact test system according to claim 2, characterized in that, The power unit is fixed to the mounting sleeve, and the mounting sleeve is fixed to the slide rod bushing.

5. The isolation ball gap device for the closed DC superimposed impact test system according to claim 2, characterized in that, The power unit is a stepper motor, and the output end of the stepper motor is connected to the slide rod.

6. The isolation ball gap device for the closed DC superimposed impact test system according to claim 1, characterized in that, The equalizing ring is mounted on the outside of the insulating shell via a bracket.

7. The isolation ball gap device for the closed DC superimposed impact test system according to claim 1, characterized in that, The insulating gas is SF6 or nitrogen.

8. The isolation ball gap device for the closed DC superimposed impact test system according to claim 1, characterized in that, The second mounting plate is equipped with an inflation valve.

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