CN209844386U - Anti-misplug device for secondary circuit of distribution board of nuclear power station - Google Patents

Abstract

The utility model relates to a nuclear power station factory low voltage distribution system technical field, concretely relates to nuclear power station distribution board secondary circuit prevents mistake cartridge and puts, the device include the drawer and hang the roof beam, the drawer upper end is equipped with hangs the ear, hangs the ear and hangs roof beam sliding fit and make the drawer can slide in the drawer storehouse, still including setting up the stop gear on the drawer lateral wall, stop gear and hang and form a sliding channel between the ear, hang the roof beam setting in sliding channel. The drawer is pushed into the drawer bin in-process sliding channel and plays a role in limiting up and down, the front end of the drawer is prevented from upwarping or sinking, secondary contact pins can be aligned with corresponding contact pin holes in the contact pin base, dislocation is avoided, and reliability and safety of a distribution board secondary circuit are guaranteed. The application provides a stop gear can directly install additional in current secondary circuit transformation, realizes the reliable safe connection in secondary circuit through installing this application additional stop gear, has reduced transformation cost and work load.

Description

Anti-misplug device for secondary circuit of distribution board of nuclear power station

Technical Field

The utility model relates to a nuclear power station factory low voltage distribution system technical field concretely relates to nuclear power station distribution board secondary circuit prevents mistake cartridge and puts.

Background

The distribution board switch drawer of current low-voltage distribution system of nuclear power plant adopts hanging beam type drawer form, through fixing the hanging beam guide rail in switch storehouse upper portion both sides, when the drawer slides into the drawer storehouse, the hanging lug reverse action on the drawer body pushes and carries out screens restriction and guide effect to the drawer, in order to guarantee the pushability of drawer during current design, reserve great unsteady space from top to bottom with the top in drawer storehouse when hanging the roof beam in the drawer storehouse sets up, consequently push drawer storehouse in-process at the drawer, although the guide rail on the hanging lug can play certain limiting displacement, but because operating personnel exert oneself inequality from top to bottom, make the drawer warp in its first half of in-process that pushes form certain angle easily. Because the drawer secondary circuit is connected by the pin, the pin part is fixedly arranged on the drawer body, the pin seat (provided with the pin holes which are arranged side by side up and down) is arranged and fixed in the drawer chamber along with the change of the drawer position, only when the pin is pushed in along with the drawer installation horizontal direction, the pin is smoothly inserted into the pin hole to ensure that the secondary circuit is smoothly connected, if the front end of the drawer is upwarped or sunk in the process of pushing the drawer chamber, the pin position has certain angle deviation easily, thereby leading the pin to be incapable of being inserted into the pin hole of the pin seat according to the original insertion track, but be inserted into other pin holes which are arranged side by side up and down in a staggered way, causing the phenomenon of wrong insertion, in the design of the distribution board system of the nuclear power station, a control power supply, an alarm power supply, a control signal and an alarm signal are all led in or out through the secondary pin, therefore, under the condition of misplugging, control or failure in transmission of alarm signals or series connection of direct-current power supplies of different levels are easily caused, so that the reliability of the direct-current power supplies is influenced, and further the stable operation of the nuclear power unit is influenced.

In addition, because the relative distance relationship between the secondary contact pin and the contact pin seat when the drawer is used at a plurality of positions (such as an isolation position, a test position and a running position) needs to be considered when designing the secondary contact pin, the contact pin is designed to be longer, has certain flexibility and can be corrected when being matched with the jack under the condition of extremely small deviation, but when the deviation is larger, if the contact pin pushes the drawer when not being aligned with the contact pin hole, the contact pin is inserted into the adjacent contact pin hole to be directly bent and damaged, the reliability and the safety of equipment are influenced, and the maintenance workload and the maintenance cost are increased.

SUMMERY OF THE UTILITY MODEL

In order to solve among the prior art technical problem that the drawer caused the secondary contact pin dislocation easily when pushing the drawer storehouse, this application provides a nuclear power station distribution board secondary circuit prevents mistake cartridge and puts, specifically realizes through following technical scheme:

the utility model provides a nuclear power station distribution board secondary circuit prevents mistake and inserts device, includes drawer and suspension beam, the drawer upper end is equipped with the suspension lug, the suspension lug with suspension beam sliding fit makes the drawer can slide in the drawer storehouse, its characterized in that still including setting up stop gear on the drawer lateral wall, stop gear with form a sliding channel between the suspension lug, suspension beam sets up in the sliding channel.

The limiting mechanism comprises an installation surface and a limiting surface, the installation surface is detachably connected with the side surface of the drawer, and the limiting surface and the hanging lugs form the sliding channel.

The mounting surface and the limiting surface are arranged in an L shape.

Furthermore, a limiting boss is arranged on the limiting surface, and the upper end surface of the limiting boss is connected with the limiting surface through an inclined surface or an arc surface.

Furthermore, the front end of the limiting surface is provided with a guide surface, and the guide surface and the front end of the hanging lug form a horn mouth.

Wherein the included angle between the guide surface and the limiting surface is 20-40 degrees.

Preferably, the included angle between the guide surface and the limiting surface is 30 degrees.

The limiting mechanism is arranged on the side wall of the drawer corresponding to the front half section of the suspension lug.

At least two groups of mounting holes are correspondingly formed in the mounting surface and the side surface of the drawer, and bolts or rivets are arranged in the mounting holes.

Preferably, the mounting hole is oval, and the bolt or the rivet is arranged in the mounting hole and can move up and down.

According to the nuclear power station distribution board secondary circuit mistake cartridge prevention device of above-mentioned embodiment, through set up stop gear on the drawer lateral wall, form a sliding channel between stop gear and the hangers, the suspension beam sets up in sliding channel, push drawer storehouse in-process sliding channel at the drawer and play spacing effect from top to bottom, avoid the drawer front end to upwarp or sink, make the secondary contact pin can with the contact pin pore pair who corresponds on the contact pin seat, avoid the dislocation, the reliability and the security of distribution board secondary circuit have been guaranteed.

Drawings

Fig. 1 is a schematic front structure view of an anti-misplug device according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view taken along the line B-B in FIG. 1;

FIG. 3 is a schematic front structure view of a limiting mechanism according to an embodiment of the present application;

fig. 4 is a schematic cross-sectional view taken along the plane a-a in fig. 3.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiment of the utility model provides an in, through set up stop gear on the drawer lateral wall, stop gear and hang and form a sliding channel between the ear, hang the roof beam setting in sliding channel, push drawer storehouse in-process sliding channel at the drawer and play spacing effect from top to bottom, avoid the drawer front end to upwarp or sink for the secondary contact pin can be aligned with the contact pin pore that corresponds on the contact pin seat, avoid the dislocation.

The first embodiment is as follows:

referring to fig. 1 and 2, the misplug prevention device of the present embodiment includes a drawer 1 and a suspension beam 21 disposed in a drawer compartment 2, wherein the upper ends of two side surfaces 12 of the drawer are respectively provided with a suspension lug 11, and the suspension lugs 11 and the suspension beam 21 are matched by a sliding rail, so that the drawer 1 can slide in the drawer compartment 2. For example, a sliding groove is formed in the upper surface of the suspension beam 21, and a sliding strip matched with the sliding groove is formed on the surface of the suspension lug 11, which is in contact with the suspension beam 21, so that the sliding strip and the sliding groove can be matched to play a role in guiding and limiting in the horizontal direction in the process that the drawer 1 is pushed into the drawer bin 2. Wherein, be equipped with a stop gear respectively on two sides 12 of drawer 1 in this embodiment, this stop gear level sets up, form a slide channel between stop gear and the suspension lug 11, suspension beam 21 sets up in this slide channel, the in-process suspension lug 11 that pushes drawer storehouse 2 at drawer 1 like this and stop gear cooperation play about spacing effect, avoid 1 front end of drawer to upwarp or sink, make the secondary contact pin can be aligned with the contact pin pore that corresponds on the contact pin seat, avoid the dislocation, the reliability and the security in distribution board secondary circuit have so been guaranteed.

As shown in fig. 3 and 4, the limiting mechanism of the present embodiment includes a mounting surface 32 and a limiting surface 31, the mounting surface 32 is detachably connected to the side surface 12 of the drawer 1, so that the limiting surface 31 is horizontally disposed below the hanging lug 11, and thus the limiting mechanism and the hanging lug 11 form a sliding channel. Specifically, in the present embodiment, the limiting mechanism is composed of two L-shaped plates, one of the two L-shaped plates forms the limiting surface 31, and the other plate forms the mounting surface 32.

Further, still be equipped with spacing boss 34 on spacing face 31, the distance between the up end of spacing boss 34 and the suspension ear 11 is littleer, and in the drawer 1 push-in process, initial stage is spacing through sliding channel, and when the front end of drawer 1 pushed spacing boss 34 position department, spacing boss 34 can play further limiting displacement for secondary contact pin in the drawer 1 can be more accurate with the alignment of the contact pin hole on the contact pin seat. Wherein, in order to facilitate the pushing-in of the drawer 1, the upper end surface of the limiting boss 34 is connected with the limiting surface 31 through an inclined surface 35 or an arc surface, so that the transition is smoother, wherein the included angle between the inclined surface 35 and the limiting surface 31 is 30 degrees.

Furthermore, the front end of the limiting surface 31 is further provided with a guide surface 33, the guide surface 33 and the front end of the hanging lug 11 form a horn shape, so that in the pushing process of the drawer 1, the guide surface 33 plays a certain guiding role, and the pushing of the drawer 1 is smoother and smoother.

The included angle between the guide surface 33 and the limiting surface 31 is not too large, and is generally set to be 20-40 degrees, and the included angle between the guide surface and the limiting surface is 30 degrees in this embodiment.

Wherein, because the secondary contact pin sets up the front end at drawer 1, in order to guarantee that drawer 1 can reliably be connected when pushing in the front end, generally install this stop gear on the drawer 1 lateral wall that suspension ear 11 first half section corresponds to guarantee to play limiting displacement to the drawer at the initial stage that drawer 1 pushed in, thereby guarantee that the drawer pushes in the later stage, through spacing boss 34 further spacing back, the secondary contact pin can accurately insert in the contact pin hole.

In this embodiment, two sets of mounting holes 321 are correspondingly disposed on the side surface 12 and the mounting surface 32 of the drawer 1, and the limiting mechanism can be detachably fixed on the drawer 1 by bolts or rivets.

When the limiting mechanism is installed, not only the gap between the limiting surface 31 and the suspension lug 11 should be considered to allow the suspension beam 21 to be smoothly inserted and slide, but also the gap between the limiting boss 34 and the suspension lug 11 should be considered to allow the suspension beam 21 to be smoothly inserted and slide. In consideration of installation errors and limit mechanism machining errors, in the embodiment, the installation hole 321 on the limit mechanism is designed to be oval, so that when the limit mechanism is installed, a bolt or a rivet can slightly move up and down in the installation hole 321, fine position adjustment can be performed, and the requirement of the gap between the limit boss 34 and the suspension lug 11 is met.

Through the false insertion prevention device of the distribution board secondary circuit of this embodiment, can carry out accurate spacing from top to bottom when drawer 1 pushes drawer storehouse 2 through limiting mechanism and spacing boss 34 thereon, avoid its front end to rock from top to bottom, guarantee that the secondary contact pin can accurately insert in the contact pin hole that corresponds, avoided the secondary circuit contact pin of distribution board to misplug, arouse that the secondary contact pin damages, the serious consequence of the direct current system series electricity of different voltage levels.

Wherein, the stop gear that this embodiment provided can directly install additional in current secondary circuit transformation, under the prerequisite that does not influence the structure and the performance of primary equipment, realizes secondary circuit's reliable safe connection through the stop gear who installs this embodiment additional, has reduced transformation cost and work load.

It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.

Claims (10)

1. The utility model provides a nuclear power station distribution board secondary circuit prevents mistake and inserts device, includes drawer and suspension beam, the drawer upper end is equipped with the suspension lug, the suspension lug with suspension beam sliding fit makes the drawer can slide in the drawer storehouse, its characterized in that still including setting up stop gear on the drawer lateral wall, stop gear with form a sliding channel between the suspension lug, suspension beam sets up in the sliding channel.

2. The device of claim 1, wherein the limiting mechanism comprises a mounting surface and a limiting surface, the mounting surface is detachably connected with the side surface of the drawer, and the sliding channel is formed between the limiting surface and the hanging lug.

3. The misplug prevention device of claim 2, wherein the mounting surface and the limiting surface are arranged in an "L" shape.

4. The misplug prevention device of claim 2, wherein a limiting boss is arranged on the limiting surface, and the upper end surface of the limiting boss is connected with the limiting surface through an inclined surface or an arc surface.

5. The misplug prevention device of claim 2, wherein a guide surface is arranged at the front end of the limiting surface, and the guide surface and the front end of the suspension lug form a horn mouth.

6. The device for preventing the misplug of claim 5, wherein the included angle between the guide surface and the limiting surface is 20-40 degrees.

7. The device of claim 6, wherein the guide surface is at an angle of 30 ° to the stop surface.

8. The device of claim 1, wherein the limiting mechanism is mounted on a corresponding drawer side wall of the front half section of the suspension lug.

9. The device of claim 2, wherein the mounting surface and the side surface of the drawer are provided with at least two sets of mounting holes, and the mounting holes are provided with bolts or rivets.

10. The device of claim 9, wherein the mounting hole is oval, and the bolt or rivet is disposed in the mounting hole and movable up and down.