CN217901930U - Middle-arranged switch cabinet insulation testing auxiliary device - Google Patents

Abstract

The utility model provides an insulating auxiliary device is surveyed to well formula cubical switchboard, its technical scheme is: the device mainly comprises a spherical probe (1), a measuring unit (2), a fixed fitting (3), a high-voltage electrified sensor (4), a sensor base (5), a panel (6), an electrified display (7), a top plate (8), a standard chassis (9), a bottom plate (10), an adjusting rod (11), an insulating cover (12), a testing window (13), an instrument frame (14), a digital megohmmeter (15) and corresponding connecting fasteners. The measuring unit (2) comprises a measuring rod (2A), an outer sleeve (2B), an inner sleeve (2C), a spring (2D), a conducting rod (2E) and a supporting tube (2F). The utility model discloses do not have strict size requirement to the cubical switchboard static contact, spherical probe is changed conveniently, and the device satisfies safe interval's requirement, can eliminate the safe risk when operating personnel surveys insulating operation, and simple to use.

Description

Middle-arranged switch cabinet insulation testing auxiliary device

Technical Field

The utility model relates to an electrical switchgear technical field, in particular to put formula cubical switchboard in and survey an auxiliary device of insulating operation.

Background

In power plants or substations, for central-mounted switchgears employing handcart-type circuit breakers, the traditional method of measuring the insulation of electrical equipment or connecting conductors (e.g. cables) is: an operator manually presses or lifts the switch cabinet curtain plate transmission mechanism to expose the shielded static contact, and the static contact is tested to be free of electricity and then measured by a megger. This kind of mode needs operating personnel's health to visit and carries out the operation in the cabinet, has the safety risk of mechanical injury and electric shock, and operates inconveniently.

In the prior art, a switch cabinet curtain plate is opened mechanically, a plum blossom contact matched with a static contact in specification is adopted, and electricity testing and insulation testing operations are carried out through a leading-out copper bar. The static contacts installed in the switch cabinet are matched with the adopted circuit breakers, the sizes and specifications of the matched static contacts are different, and the diameters of the common static contacts are 35mm, 49mm, 79mm and 109mm. Therefore, when the specifications of the fixed contacts of the switch cabinets are different, a special tool needs to be used for replacing the matched tulip contact, which is inconvenient for field operators.

Disclosure of Invention

The utility model provides an insulating auxiliary device is surveyed to well put formula cubical switchboard takes following technical scheme.

An auxiliary device for measuring insulation of a central switch cabinet comprises: the device comprises a spherical probe, a measuring unit, a fixed fitting, a high-voltage charged sensor, a sensor base, a panel, a charged display, a top plate, a standard chassis, a bottom plate, an adjusting rod, an insulating cover, a testing window, an instrument frame, a digital megameter and corresponding connecting fasteners; the measurement unit includes: measuring stick, outer sleeve, inner skleeve, spring, conducting rod and stay tube.

Spherical probe and measuring unit threaded connection, measuring unit passes through fixed fitting and installs on high voltage live sensor, the sensor passes through sensor pedestal mounting on the bottom plate, bottom plate and panel pass through the adjusting lever to be fixed on standard chassis, the roof is fixed in the panel both sides, electrified display and instrument rack are installed on the panel, the insulating boot cover is on fixed fitting and stay tube, test window and stay tube threaded connection, digital megohmmeter is placed in instrument rack.

Preferably, the insulation cover and the test window are made of insulation materials, and the digital megohmmeter is portable.

The utility model provides an auxiliary device for insulation is surveyed to central-positioned cubical switchboard, spherical probe is opened has a round hole to weld a flange nut, the round hole is concentric with the flange nut.

Preferably, the spherical probe is made of copper or plated with copper on the outer surface.

One end of the measuring rod is in threaded connection with a flange nut of the spherical probe and is locked and fixed by the nut, and the other end of the measuring rod is arranged in the outer sleeve and is in threaded connection with the conducting rod; the inner sleeve is internally provided with a spring and is arranged in the outer sleeve; the outer sleeve is in threaded connection with the support tube; the tail end of the supporting tube is in threaded connection with the test window, and the conducting rod can freely stretch out and draw back in the central round hole of the test window.

Preferably, the outer sleeve is made of an insulating material or is sleeved with a high-pressure heat-shrinkable insulating tube.

An insulation auxiliary device is measured to a central-positioned switch cabinet, a panel is processed and molded through a sheet metal process, two rectangular holes are formed in the front face of the panel, an electrified display is installed in one rectangular hole through a screw, and the other rectangular hole is used as an observation and operation window of a digital megger; the top plate is respectively fixed on two sides of the panel through bolts; and the electrified display is respectively connected with the three high-voltage electrified sensor wiring terminals and the standard chassis grounding copper bar through insulated wires.

The utility model discloses beneficial effect: the utility model provides a pair of insulating auxiliary device is surveyed to well formula cubical switchboard does not have strict dimensional requirement to the cubical switchboard static contact, and spherical probe changes conveniently, and the device satisfies safe interval's requirement, can eliminate the safe risk when operating personnel surveys insulating operation, and simple to use.

Drawings

FIG. 1 is a schematic diagram of the device structure.

Fig. 2 is a partial cross-sectional view of the device.

Fig. 3 is an outline view of the device insulating cover.

FIG. 4 is a schematic diagram of an exemplary device application.

Detailed Description

The utility model provides an insulating auxiliary device is surveyed to well formula cubical switchboard, for making the utility model discloses a purpose, technical scheme and effect are clearer, and further detailed description is explained with reference to the attached drawing below.

It should be noted that the terms of orientation such as left, right, up, down, etc. in the application examples of the present invention are only used for reference to the normal use state of the device or the common habits, and should not be considered as restrictive.

Referring to fig. 1 to 3, central-positioned cubical switchboard surveys insulating auxiliary device, including spherical probe 1, measuring unit 2, fixed gold utensil 3, high voltage electric sensor 4, sensor base 5, panel 6, electrified display 7, roof 8, standard chassis 9, bottom plate 10, adjusting lever 11, insulating boot 12, test window 13, instrument rack 14, digital megohmmeter 15 and corresponding coupling spare. The measuring unit 2 includes a measuring rod 2A, an outer sleeve 2B, an inner sleeve 2C, a spring 2D, a conductive rod 2E, and a support tube 2F.

Specifically, central-positioned cubical switchboard survey insulating auxiliary device, high voltage live sensor 4 is fixed on sensor base 5 with the bolt.

Further, the sensor base 5 is fixed to the base plate 10 with screws.

Further, the base plate 10 and the face plate 6 are fixed to a standard chassis 9 by means of an adjusting lever 11.

Furthermore, the position of the top plate 8 is adjusted and folded upwards, and the top plate 8 is fixed on the side surface of the panel 6 by bolts, and the left and the right plates are symmetrically arranged.

Further, the base 3B of the fixing fitting 3 is fixed to the upper flange of the sensor 4 by a bolt.

Further, the measuring unit 2 is placed in a circular cavity of the fixing hardware fitting 3, the position of the supporting tube 2F is adjusted, and the top cover 3A of the fixing hardware fitting 3 and the bolt of the base 3B are connected, so that the supporting tube 2F of the measuring unit 2 is fixed.

Further, the spherical probe 1 is in threaded connection with a measuring rod 2A of the measuring unit 2 through a flange nut 1A, and the position of the spherical probe 1 is adjusted and locked by a nut.

Furthermore, the corresponding connecting terminal of the electrified display 7 is connected with the three-phase high-voltage electrified sensor 4 and the ground copper bar of the standard chassis 9 by using an insulated wire.

Further, with insulating boot cover 12 on fixed fitting 3 and stay tube 2F, conducting rod 2E penetrates the center round hole of test window 13, twists test window 13 into the internal thread hole of stay tube 2F.

Further, a digital megohmmeter 15 is placed in the meter rack 14.

Please refer to fig. 4 for a part of application examples of the middle-positioned switch cabinet insulation auxiliary device, the example is used for testing insulation of the lower row of the fixed contact of the switch cabinet with the highest application frequency in the production field, the top plate 8 is mounted at the top, and only the lower row of the contact shutter is opened during use, and the upper row of the contact shutter is still closed.

The application example shown in fig. 4 illustrates that the general process of using the central switch cabinet insulation testing auxiliary device of the present invention is as follows:

1) Pushing the auxiliary insulation testing device into the test position in the switch cabinet;

2) An operating handle (a matched tool of a standard chassis) is inserted into an operating hole of the standard chassis 9, the operating handle is slowly rotated, and a movable part of an observation device slowly enters a switch cabinet;

3) The top plate 8 presses down the curtain plate transmission pin of the switch cabinet, the lower curtain plate is opened slowly, and the shielded static contact is exposed;

4) The spherical probe 1 slowly approaches until contacting a fixed contact of the switch cabinet, the state of an indicator lamp of the high-voltage electrified display 7 on the panel is observed, if the indicator lamp is on, the switch cabinet is reminded that the fixed contact is electrified, and the operation is immediately stopped and appropriately processed;

5) If the indicator light of the electrified display 7 is not bright, indicating that the static contact is electricity-free, the operation handle is continuously rotated, and the spherical probe 1 drives the end part of the conductive rod 2E to extend out of the test window 13 through the measuring rod 2A and the compression spring 2D;

6) After confirming that three phases do not have voltage on the conductive rod 2E extending outside the test window 13 using a contact electroscope of an appropriate voltage class, the insulation test operation is performed using the digital megohmmeter 15.

It should be noted that, the utility model discloses a central-positioned cubical switchboard is surveyed insulating auxiliary device though have electrified warning function, must use appropriate contact electroscope to verify electroless, can confirm to confirm that it is voltage certainly.

Claims (2)

1. The utility model provides an insulating auxiliary device is surveyed to central-positioned cubical switchboard which characterized in that: the device comprises a spherical probe (1), a measuring unit (2), a fixed fitting (3), a high-voltage electrified sensor (4), a sensor base (5), a panel (6), an electrified display (7), a top plate (8), a standard chassis (9), a bottom plate (10), an adjusting rod (11), an insulating cover (12), a test window (13), an instrument frame (14), a digital megohmmeter (15) and corresponding connecting fasteners; the measuring unit (2) comprises a measuring rod (2A), an outer sleeve (2B), an inner sleeve (2C), a spring (2D), a conducting rod (2E) and a supporting tube (2F); spherical probe (1) and measuring unit (2) threaded connection, measuring unit (2) are installed on high-voltage electric sensor (4) through fixed fitting (3), install on bottom plate (10) through sensor base (5) sensor (4), bottom plate (10) and panel (6) are fixed on standard chassis (9) through adjusting lever (11), roof (8) are fixed in panel (6) both sides, install on panel (6) electrified display (7) and instrument rack (14), insulating boot (12) cover is on fixed fitting (3) and stay tube (2F), test window (13) and stay tube (2F) threaded connection, digital megohmmeter (15) are placed in instrument rack (14).

2. The middle-mounted switchgear insulation testing auxiliary device according to claim 1, characterized in that: the spherical probe (1) is a hollow sphere which is made of copper or plated with copper on the outer surface, a round hole is formed in the spherical probe, a flange nut (1A) is welded on the outer surface of the sphere, and the round hole is concentric with a screw hole of the flange nut (1A).

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