Device for testing withstand voltage of upper fracture of circuit breaker of environment-friendly cabinet

Abstract

The utility model provides an environment-friendly cabinet circuit breaker upper fracture withstand voltage test device, which comprises three connecting mechanisms arranged at intervals, each connecting mechanism comprises a connecting sleeve, a connecting fitting, an insulating sleeve and a buckle mechanism, one end of each connecting sleeve is inserted into an environment-friendly cabinet and connected with a circuit breaker, and the other end of each connecting sleeve is connected with the circuit breaker. The connecting fitting comprises a connecting section and an extending section which is arranged on the connecting section and extends in the direction of the connecting section, the connecting section is detachably clamped into the connecting sleeve through a buckle mechanism, the connecting section is connected with the input end of the circuit breaker when clamped into the connecting sleeve, the extending section is located outside the connecting sleeve and extends horizontally, and the insulating sleeve is arranged on the connecting section in a sleeving mode. The outer end of the extension section is provided with a wiring section. The device is suitable for carrying out a withstand voltage test on the upper fracture of the environment-friendly cabinet so as to ensure that the withstand voltage value of the environment-friendly cabinet leaving a factory meets the requirement.

Description

Technical Field

[0001] The utility model belongs to the field of environmental protection cabinet withstand voltage test, and in particular relates to an environmental protection cabinet circuit breaker upper fracture withstand voltage test device. Background Art

[0002] The environmental protection cabinet is a new type of high-voltage switchgear, which uses specially treated dry air as the insulating medium. Its insulation and arc extinguishing performance are better than SF6 (sulfur hexafluoride) gas, and it is pollution-free, which is in line with the current development trend of low-carbon and environmental protection. Compared with the traditional ring network cabinet that uses SF6 gas as insulation, the environmental protection cabinet has very high requirements for the withstand voltage of the upper and lower fractures of its circuit breaker, so the upper and lower fractures must be subjected to withstand voltage tests before the equipment leaves the factory. The ring network cabinet withstand voltage test device with patent number ZL201520420276.5 can be used to perform withstand voltage tests on the lower fracture of the environmental protection cabinet, but there is no device suitable for withstand voltage tests on the upper fracture of the environmental protection cabinet in the prior art. Utility Model Content

[0003] The utility model provides an upper break voltage test device for an environmental protection cabinet circuit breaker, which is suitable for performing a voltage test on the upper break of the environmental protection cabinet to ensure that the voltage withstand value of the environmental protection cabinet shipped out of the factory meets the requirements.

[0004] The utility model is realized by the following technical solutions:

[0005] The invention discloses an upper fracture withstand voltage test device for a circuit breaker of an environmental protection cabinet. The circuit breaker is arranged in the environmental protection cabinet and comprises three connection mechanisms arranged at intervals. The connection mechanisms comprise a connection sleeve, a connection hardware, an insulating sleeve and a buckle mechanism. One end of the connection sleeve is inserted into the environmental protection cabinet and connected to the circuit breaker. The connection hardware comprises a connection section and an extension section which is arranged on the connection section and extends along the direction of the connection section. The connection section is detachably snapped into the connection sleeve through the buckle mechanism. When the connection section is snapped into the connection sleeve, it is connected to an input end of the circuit breaker. The extension section is located outside the connection sleeve and extends horizontally. The insulating sleeve is sleeved on the connection section. A wiring section is arranged at the outer end of the extension section. During the test, insert the connecting section into the connecting sleeve, and then connect the electrical cable to the connecting section, so that the cable is connected to the connecting section and a voltage loop is formed, and the upper fracture withstand voltage test can be carried out. On the other hand, the electrical cable can also be connected to the three wiring sections respectively, and the three-phase lines of the environmental protection cabinet are connected in parallel through connecting hardware, so as to perform the upper fracture withstand voltage test of the three-phase lines at the same time, which effectively improves the test efficiency. During the test, the creepage distance and insulation performance are improved by the insulating sleeve, which can ensure that the withstand voltage value meets the requirements of the relevant standards, thereby ensuring that the withstand voltage value of the environmental protection cabinet leaving the factory meets the requirements.

[0006] Furthermore, the snap mechanism includes two spring rings spaced apart on the connecting section and two inclined surfaces spaced apart on the inner side of the connecting sleeve. The connecting sleeve includes a middle section and two side sections. The inner side of the middle section has an annular boss protruding inward. The diameter of the connecting section matches the diameter of the annular boss. The inclined surface is formed between the end of the connecting ring and the side section. When snapped in, the two spring rings respectively rest on the two inclined surfaces, and the extension section extends outward and passes through the connecting sleeve. The snap mechanism facilitates the connection and separation of the connecting section and the connecting sleeve. The structure is simple and reliable, and the operation is convenient and fast.

[0007] Furthermore, the diameter of the extension section is smaller than that of the connection section, so that the extension section can be connected to the sleeve and pass through more conveniently.

[0008] Furthermore, the extension section is welded to the end of the connecting section.

[0009] Furthermore, the extending section and the connecting section are integrally formed.

[0010] Furthermore, the wiring segment includes a flat plate and a through hole arranged on the flat plate, which facilitates the connection of the cable.

[0011] Furthermore, the connecting sleeve is arranged at the upper end of the side of the environmental protection cabinet to facilitate the test of the upper fracture of the circuit breaker.

[0012] Furthermore, the connecting sleeve is a side outlet of the environmental protection cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0014] Figure 1 It is a structural schematic diagram of the connection mechanism of the utility model.

[0015] Figure 2 It is a schematic cross-sectional structural diagram of the connecting sleeve of the utility model.

[0016] Figure 3 It is a structural schematic diagram of the connection fitting and the insulating sleeve of the utility model.

[0017] Figure 4 This is a schematic diagram of the utility model installed on an environmental protection cabinet.

[0018] Among them, 1. Environmental protection cabinet; 2. Connecting sleeve; 21. Middle section; 22. Side section; 23. Annular boss; 3. Connecting hardware; 31. Connecting section; 32. Extended section; 33. Wiring section; 331. Flat plate; 332. Through hole; 4. Insulating sleeve; 51. Spring coil; 52. Inclined surface. DETAILED DESCRIPTION

[0019] like Figures 1 to 4As shown, the upper fracture withstand voltage test device of the environmental protection cabinet circuit breaker includes three connection mechanisms arranged at intervals, and the connection mechanism includes a conductive connection sleeve 2, a connection hardware 3, an insulating sleeve 4 and a buckle mechanism. The circuit breaker is arranged in the environmental protection cabinet 1, and the specific structure of the circuit breaker is the prior art. One end of the connection sleeve 2 is inserted into the upper end of the side of the environmental protection cabinet 1 and is arranged horizontally. The connection hardware 3 includes a connection section 31 and an extension section 32 arranged on the connection section 31 and extending along the direction of the connection section 31. The connection section 31 is detachably inserted into the connection sleeve 2 through the buckle mechanism. When the connection section 31 is inserted into the connection sleeve 2, it is connected to the input end of the circuit breaker. The extension section 32 is located outside the connection sleeve 2 and extends horizontally. The insulating sleeve 4 is sleeved on the connection section 31. Among them, the connection sleeve 2 is made of conductive material, and it is connected to the circuit breaker when it is inserted into the environmental protection cabinet 1. This part is the prior art.

[0020] The buckle mechanism includes two spring rings 51 spaced apart and sleeved on the connecting section 31, and two inclined surfaces 52 spaced apart and formed on the inner side of the connecting sleeve 2. Specifically, the connecting sleeve 2 includes a middle section 21 and two side sections 22 respectively disposed at both ends of the middle section 21. The diameters of the two side sections 22 gradually decrease. The inner side of the middle section 21 has an annular boss 23 protruding inwardly. The diameter of the connecting section 31 matches the inner diameter of the annular boss 23. An inclined surface 52 is formed between the end of the annular boss 23 and the inner sides of the two side sections 22. Two groups of spring rings 51 can also be disposed on the connecting section 31, and each group of spring rings 51 includes a plurality of spring rings 51 arranged side by side. After the connecting section 31 enters the other side section 22 from one side section 22 through the middle section 21, the two spring rings 51 respectively abut against the two inclined surfaces 52 to clamp the connecting section 31 in the connecting sleeve 2. The diameter of the extension section 32 is smaller than that of the connecting section 31, and it extends outward and passes through the connecting sleeve 2.

[0021] In this embodiment, the extension section 32 is welded to the end of the connecting section 31. In other embodiments, the extension section 32 can also be integrally formed with the connecting section 31. In order to facilitate wiring during testing, a wiring section is provided at the outer end of the extension section 32. The wiring section includes a flat plate 331 and a through hole 332 provided on the flat plate 331.

[0022] In this embodiment, the connecting sleeve 2 is a side outlet of the environmental protection cabinet 1. By utilizing the side outlet structure of the environmental protection cabinet 1 itself, the test device can be made simpler and more reliable.

[0023] During the test, the cable is connected to the wiring section, and then connected to the connecting sleeve 2 through the connecting section 31, so as to form a voltage loop, and then the withstand voltage test can be performed. The three connecting mechanisms correspond to the three-phase circuit of the ring network cabinet. In order to improve the test efficiency, the upper fracture withstand voltage test of the three-phase circuit can also be operated simultaneously.

[0024] The above description is only a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of implementation of the present utility model. That is, equivalent changes and modifications made according to the scope of the patent application of the present utility model and the contents of the specification should still fall within the scope covered by the patent of the present utility model.

Claims

1. A device for testing the upper fracture withstand voltage of an environmental protection cabinet circuit breaker, wherein the circuit breaker is arranged in the environmental protection cabinet, and is characterized in that: The invention comprises three connection mechanisms which are arranged at intervals, wherein the connection mechanism comprises a connection sleeve, a connection fitting, an insulating sleeve and a buckle mechanism; one end of the connection sleeve is inserted into the environmental protection cabinet and connected with the circuit breaker; the connection fitting comprises a connection section and an extension section which is arranged on the connection section and extends along the direction of the connection section; the connection section is detachably inserted into the connection sleeve through the buckle mechanism; when the connection section is inserted into the connection sleeve, the connection section is connected to the input end of the circuit breaker; the extension section is located outside the connection sleeve and extends horizontally; the insulating sleeve is sleeved on the connection section; and a wiring section is arranged at the outer end of the extension section.

2. The upper fracture withstand voltage test device of the environmental protection cabinet circuit breaker according to claim 1, characterized in that: The snap mechanism includes two spring rings spaced apart on the connecting section and two inclined surfaces spaced apart on the inner side of the connecting sleeve. The connecting sleeve includes a middle section and two side sections. The inner side of the middle section has an annular boss protruding inward. The diameter of the connecting section matches the diameter of the annular boss. The inclined surface is formed between the end of the connecting ring and the side section. When snapped in, the two spring rings respectively rest on the two inclined surfaces, and the extension section extends outward and passes through the connecting sleeve.

3. The upper fracture withstand voltage test device of an environmental protection cabinet circuit breaker according to claim 1, characterized in that: The extension section has a smaller diameter than the connection section.

4. The upper fracture withstand voltage test device of an environmental protection cabinet circuit breaker according to claim 1, 2 or 3, characterized in that: The extension section is welded to the end of the connection section.

5. The upper fracture withstand voltage test device of an environmental protection cabinet circuit breaker according to claim 1, 2 or 3, characterized in that: The extending section and the connecting section are integrally formed.

6. The upper fracture withstand voltage test device of an environmental protection cabinet circuit breaker according to claim 1, 2 or 3, characterized in that: The wiring segment includes a flat plate and a through hole arranged on the flat plate.

7. The upper fracture withstand voltage test device of an environmental protection cabinet circuit breaker according to claim 1, 2 or 3, characterized in that: The connecting sleeve is arranged at the upper end of the side surface of the environmental protection cabinet.

8. The upper fracture withstand voltage test device of an environmental protection cabinet circuit breaker according to claim 1, 2 or 3, characterized in that: The connecting sleeve is a side outlet of the environmental protection cabinet.

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