CN216849708U

CN216849708U - Key safety interlocking device of medium-voltage switch cabinet

Info

Publication number: CN216849708U
Application number: CN202123411695.7U
Authority: CN
Inventors: 李领; 陈细栋; 陆逸; 张群
Original assignee: JINPAN ELECTRIC GROUP (SHANGHAI) CO Ltd
Current assignee: JINPAN ELECTRIC GROUP (SHANGHAI) CO Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-06-28
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a middling pressure cubical switchboard key safety interlock, the device comprises a device body, the device body includes power lock and key exchange box, the power lock includes power lock tapered end, fixation nut, power lock pivot, the power lock tapered end is located device body bottom, fixation nut installs in power lock tapered end rear end, the power lock pivot is installed in fixation nut rear end, the key hole has been seted up on power lock tapered end surface. The device replaces complicated and unreliable interlocking with safe and reliable interlocking, is convenient to install, does not need to maintain a mechanical interlocking device, does not influence the interlocking of the original medium-voltage switch cabinet due to the modular design, does not influence the mechanisms of the switch cabinet and a transformer room, increases the reliability, and is very suitable for being used in the built-in and transformer overhead projects of the wind power medium-voltage switch cabinet.

Description

Key safety interlocking device of medium-voltage switch cabinet

Technical Field

The utility model relates to a medium voltage switch cabinet technical field specifically is a medium voltage switch cabinet key safety interlock.

Background

The national reform committee issues the requirement that the wind power of 8 th day and 1 st day of this year starts to carry out the flat price surfing. Under the background, wind power cost reduction is extremely important, most fan manufacturers propose a scheme of arranging a transformer wind tower at the top and arranging a switch cabinet wind tower in the wind tower, a medium-voltage switch cabinet in a tower is about 150 meters away from a transformer at the top of the fan, and a medium-voltage switch cabinet and transformer room mechanical safety key interlocking system is developed in order to ensure maintenance safety and safe operation of the fan.

The interlocking device of the existing conventional medium-voltage switch cabinet and the transformer generally has two modes: the method comprises the following steps that firstly, a switch cabinet is provided with a high-voltage live display transformer room door and a magnetic lock, and the high-voltage live display transformer room door is locked; and in the second mode, a travel switch is installed on the transformer chamber door, and the high-voltage cabinet trips when the transformer chamber door is opened.

The existing interlocking device for the medium-voltage switch cabinet and the transformer chamber has the following defects:

two schemes of the interlocking device of the conventional switch cabinet and the transformer can not ensure that the medium-voltage switch cabinet is in a grounding state certainly, and can only ensure that the high-voltage cabinet is in an opening state, residual current can exist in a high-voltage cable and the transformer after opening, if the opening state enters a transformer room, the human body is likely to be injured, the safety is lower, the two schemes need to control a power supply, the wind tower power supply is taken from the site more, the site has many sudden situations, once the control power supply is lost, the protection function can not be played, and therefore the performance is unreliable. The distance between a medium voltage switch cabinet and a top transformer chamber in the wind tower is about 150 meters, cables need to be arranged in two conventional interlocking modes, and the installation process is complex and the cost is high.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a well voltage switch cabinet key safety interlock has solved at the bottom of the current well voltage switch cabinet protection security, problem that the reliability is not high.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a middling pressure cubical switchboard key safety interlock, includes the device body, the device body includes power lock and key exchange box, the power lock includes power lock tapered end, fixation nut, power lock pivot, the power lock tapered end is located device body bottom, fixation nut installs at power lock tapered end rear end, the power lock pivot is installed at fixation nut rear end, the key hole has been seted up on power lock tapered end surface.

Preferably, the upper end and the lower end of the bottom of the key exchange box are both provided with mounting side plates, and a group of key exchange box mounting holes distributed in a symmetrical mode are formed in the surfaces of the mounting side plates.

Preferably, a lock boss is installed at the front end of the key exchange box, a lock is installed at the rear end of the key exchange box, and a key jack is arranged at the rear end of the lock.

Preferably, the key exchange box has the side to be equipped with the locking plate, three locking plate mounting hole that is triangular array form and distributes is seted up on the locking plate surface.

(III) advantageous effects

The utility model provides a middling pressure switch cabinet key safety interlock. The method has the following beneficial effects:

1. this mechanical safety key interlock carries out safe interlocking with two very distant equipment of medium voltage switchgear and transformer, can go to open transformer room door promptly in medium voltage switchgear ground connection state, avoids the incident, improves the reliability.

2. And a modular installation mode is adopted, so that the installation is easy, and the universality and interchangeability of the structural design are improved.

3. Mechanical safety key interlock installation is simple, and power tool to lock adopts screw thread and nut to connect, adopts 7 sets of bolt and nut to connect between key exchange box and the equipment, and installation easy operation has greatly improved the construction installation effectiveness.

4. The overall dimension is smaller, the maximum dimension phi of the lock head of the power lock is 25.2 × 47mm, and the lock of the 2# key exchange box is 107 × 84 × 74.5 mm.

Drawings

FIG. 1 is a schematic structural view of the power lock of the present invention;

FIG. 2 is a top view of the power lock of the present invention;

FIG. 3 is a top view of the key exchange box of the present invention;

FIG. 4 is a cross-sectional view of the key exchange case of the present invention;

fig. 5 is a side view of the key exchange case of the present invention.

In the figure, 1, an apparatus body; 2. a power lock; 3. a key exchange box; 4. a power lock head; 5. fixing a nut; 6. a power lock rotating shaft; 7. a key hole; 8. installing a side plate; 9. a key exchange box mounting hole; 10. a lock head boss; 11. a lock head; 12. a locking plate; 13. a locking plate mounting hole; 14. a key insertion hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, an embodiment of the present invention provides a technical solution: a key safety interlocking device of a medium-voltage switch cabinet comprises a device body 1, wherein the device body 1 comprises a power lock 2 and a key exchange box 3, the power lock 2 comprises a power lock tapered end 4, a fixed nut 5 and a power lock rotating shaft 6, the power lock tapered end 4 is positioned at the bottom end of the device body 1, the fixing nut 5 is arranged at the rear end of the power lock head 4, the power lock rotating shaft 6 is arranged at the rear end of the fixing nut 5, the surface of the power lock head 4 is provided with a key hole 7, the power lock 2 can effectively lock the grounding switch, only when the grounding switch is switched on, the corresponding lock key can be pulled out, and then the lock key can be taken to open the key exchange box 3 on the transformer room door, thereby, the safety is improved, and the condition that when the grounding switch is not switched on, the worker opens the key exchange box 3 through the key to cause harm to the body of the worker by the current is prevented.

Both ends all are equipped with installation curb plate 8 about key exchange box 3 bottom, a set of key exchange box mounting hole 9 that is the symmetric mode and distributes is seted up on installation curb plate 8 surface, and the installation curb plate 8 at both ends can be convenient for the staff to fix key exchange box 3 about key exchange box 3, and only need the screw just can fix it.

The front end of the key exchange box 3 is provided with a lock boss 10, the rear end of the key exchange box 3 is provided with a lock 11, the rear end of the lock 11 is provided with a key insertion hole 14, and a worker can insert a key into the key insertion hole 14, so that the key exchange box 3 is opened, and the safety is improved.

Key exchange box 3 has the side to be equipped with locking plate 12, three locking plate mounting hole 13 that is the distribution of triangular array form is seted up on locking plate 12 surface, and three locking plate mounting hole 13 that is the distribution of triangular array form is seted up on locking plate 12 surface can be convenient for the staff and insert the screw to fix it, and the locking plate mounting hole 13 of triangular array form is fixed stable, can prevent effectively that locking plate 12 is not hard up.

The working principle is as follows: during operation, a worker installs the power lock 2 at the grounding switch, when the grounding switch is switched on, the corresponding lock key can be pulled out, and at the moment, the lock key can be taken to open the key exchange box 3 on the transformer room door, so that the transformer room door is opened when the medium-voltage switch cabinet is in a grounding state, and the transformer maintenance is carried out in a safe state; the personal safety of transformer maintenance and repair personnel is ensured.

The utility model 1, a device body; 2. a power lock; 3. a key exchange box; 4. a power lock head; 5. fixing a nut; 6. a power lock rotating shaft; 7. a key hole; 8. installing a side plate; 9. a key exchange box mounting hole; 10. a lock head boss; 11. a lock head; 12. a locking plate; 13. a locking plate mounting hole; 14. key jack, part are the parts that general standard spare or technical personnel in the field know, and its structure and principle all are this technical personnel all can learn through the technical manual or learn through conventional experimental method, the utility model provides a problem be at the bottom of current medium voltage switchgear protection security, the not high problem of reliability, the utility model discloses a mutual combination of above-mentioned parts can improve the security, and this kind of installation is convenient, general, effective reliable solution between the medium voltage switchgear, the problem of shutting each other between earthing switch and the transformer room door, provides reliable guarantee for field personnel's maloperation of preventing, has satisfied just can open the transformer room door after the switchgear ground connection, gets into the transformer room and maintains, has protected staff's operational safety.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a middling pressure cubical switchboard key safety interlock which characterized in that: including device body (1), device body (1) includes power lock (2) and key exchange box (3), power lock (2) are including power lock tapered end (4), fixation nut (5), power lock pivot (6), power lock tapered end (4) are located device body (1) bottom, fixation nut (5) are installed in power lock tapered end (4) rear end, power lock pivot (6) are installed in fixation nut (5) rear end, key hole (7) have been seted up on power lock tapered end (4) surface.

2. A medium voltage switchgear key safety interlock as claimed in claim 1, characterized in that: the key exchange box is characterized in that installation side plates (8) are arranged at the upper end and the lower end of the bottom of the key exchange box (3), and a group of key exchange box installation holes (9) distributed in a symmetrical mode are formed in the surfaces of the installation side plates (8).

3. A medium voltage switchgear key safety interlock as claimed in claim 1, characterized in that: the front end of the key exchange box (3) is provided with a lock boss (10), the rear end of the key exchange box (3) is provided with a lock (11), and the rear end of the lock (11) is provided with a key jack (14).

4. A medium voltage switchgear key safety interlock as claimed in claim 1, characterized in that: the key exchange box (3) is provided with a locking plate (12) on the side, and three locking plate mounting holes (13) distributed in a triangular array shape are formed in the surface of the locking plate (12).