CN211828358U

CN211828358U - Human body approaching type electric shock prevention dry-type power transformer protective shell

Info

Publication number: CN211828358U
Application number: CN202020796857.XU
Authority: CN
Inventors: 龙海滨; 潘云珠
Original assignee: Qingdao Haiwan Chemical Engineering Design & Research Institute Co ltd
Current assignee: Qingdao Haiwan Chemical Engineering Design & Research Institute Co ltd
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2020-10-30
Anticipated expiration: 2030-05-14

Abstract

The utility model discloses a human type protection shell of protection against electric shock dry-type power transformer that approaches, concretely relates to dry-type power transformer technical field, including dry-type transformer shell, the both sides in dry-type transformer shell the place ahead are all articulated to be equipped with the cabinet door, two middle part fixed mounting between the cabinet door has mechanical interlocking switch, mechanical interlocking switch includes mechanical lock and electromagnetic lock, two the cabinet door opens and shuts through mechanical lock and electromagnetic lock control. The utility model discloses an use human proximity sensor as main monitoring and trigger the original paper, combine mechanical interlock switch, when human or human position (like arm, head etc.) get into the dangerous area under transformer charged state in the time, can effectively realize reporting to the police fast in time or the outage operation, under the prerequisite of guaranteeing dry-type power transformer normal steady operation, can ensure the operation personnel and examine maintenance personal's safety, furthest's the emergence of this type of accident of reduction.

Description

Human body approaching type electric shock prevention dry-type power transformer protective shell

Technical Field

The utility model relates to a dry-type power transformer technical field, more specifically say, the utility model relates to a human body is close type protection against electric shock dry-type power transformer protective housing.

Background

In the engineering design and installation use process of dry-type power transformer, because of receiving installation space restriction or for the operation maintenance convenient etc, often can have the condition of arranging side by side with the low-voltage switchgear in same room, daily operation personnel and examine maintenance personal often need closely contact dry-type power transformer, there is certain potential safety hazard, usually, the electrified part that exposes of dry-type power transformer can install in protective housing, and all leave the safety protection distance that accords with the standard requirement with the shell, when transformer normal live-line operation, its protective housing is totally enclosed, and the cabinet door all installs mechanical blocking device usually, also can't open in normal operation, if open unusually, can send the warning.

However, for the continuous reliability of power supply, generally, the alarm is in the form of sound and light alarm such as a buzzer or a warning light, and the power supply is not directly cut off, so that when the front door of the transformer protective shell is accidentally opened without causing enough attention of operation and maintenance personnel or under the condition of illegal live working, electric shock accidents, even casualty accidents are easily caused, and in the actual operation, the accidents are also often caused.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned defect of prior art, the embodiment of the utility model provides a human body is close to type protection against electric shock dry-type power transformer protective housing, the utility model aims to solve the technical problem that: the cabinet door of the dry-type power transformer is opened abnormally, sound and light alarm forms such as a buzzer or a warning lamp are adopted at present, a power supply source cannot be directly cut off, and accidents are easy to happen if operation and maintenance personnel pay enough attention or under the condition of illegal live working.

In order to achieve the above object, the utility model provides a following technical scheme: a human body approaching type electric shock prevention dry-type power transformer protection shell comprises a dry-type transformer shell, wherein cabinet doors are hinged to two sides of the front of the dry-type transformer shell, a mechanical interlocking switch is fixedly mounted in the middle between the two cabinet doors and comprises a mechanical lock and an electromagnetic lock, the two cabinet doors are controlled to be opened and closed through the mechanical lock and the electromagnetic lock, a plurality of individual body approaching sensors are fixedly mounted at the front end of the dry-type transformer shell, a control box is fixedly mounted above one side of the front end of the dry-type transformer shell, a judging and triggering control circuit is fixedly mounted on the inner side of the control box, an audible and visual alarm is arranged above the control box and comprises two warning lamps, the bottom ends of the two warning lamps are fixedly mounted with two sides of the upper end of the control box respectively, and two buzzers are arranged above the, the bottom ends of the two buzzers are fixedly installed at the upper end of the control box.

By taking the human body proximity sensor as a main monitoring and triggering element and combining the mechanical interlocking switch, when a human body or human body parts (such as arms, heads and the like) enter a dangerous area under the charged state of the transformer, the rapid and timely alarming or power-off operation can be effectively realized, the safety of operators and maintenance personnel can be ensured on the premise of ensuring the normal and stable operation of the dry-type power transformer, and the occurrence of accidents is reduced to the maximum extent.

In a preferred embodiment, the upper parts of the two dry-type transformer housings are fixedly provided with observation windows, so that the internal conditions of the dry-type transformer housings can be observed conveniently.

In a preferred embodiment, the number of the human body proximity sensors is three, the three human body proximity sensors are respectively located on two sides of the middle of the front end of the dry type transformer shell and in the middle of the upper side of the front end, the three human body proximity sensors are all electrically connected with the judgment trigger control circuit, and the detection range of the three human body proximity sensors can be expanded.

In a preferred embodiment, the mechanical lock and the electromagnetic lock are both electrically connected with the determination trigger control circuit through contacts.

In a preferred embodiment, the two warning lamps and the two buzzers are both electrically connected with the judgment trigger control circuit.

In a preferred embodiment, two of said buzzers are located between two warning lights.

The utility model discloses a technological effect and advantage:

1. the utility model discloses an use human proximity sensor as main monitoring and trigger original paper, combine mechanical interlock switch, when human or human position (such as arm, head etc.) get into the dangerous area under transformer charged state, can effectively realize reporting to the police fast in time or the outage operation, under the prerequisite of realizing guaranteeing dry-type power transformer normal stable operation, can ensure the operation personnel and examine the maintenance personnel's safety, furthest's reduction such emergence of accident;

2. the utility model discloses a dry-type power transformer protective housing, the function of accurate monitoring of realization that can be better, quick judgement, in time report to the police, effective control can furthest avoid the occurence of failure.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic block diagram of the system of the present invention.

Fig. 3 is a circuit diagram of the present invention for determining trigger control.

The reference signs are:

the intelligent control system comprises a dry type transformer shell 1, a cabinet door 2, a mechanical interlocking switch 3, a mechanical lock 31, an electromagnetic lock 32, a human body proximity sensor 4, a control box 5, a judgment trigger control circuit 6, an audible and visual alarm 7, a warning lamp 71, a buzzer 72 and an observation window 8.

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.

The utility model provides a human body approaching type electric shock prevention dry-type power transformer protective casing, which comprises a dry-type transformer casing 1, wherein cabinet doors 2 are hinged on two sides in front of the dry-type transformer casing 1, a mechanical interlocking switch 3 is fixedly installed in the middle between the two cabinet doors 2, the mechanical interlocking switch 3 comprises a mechanical lock 31 and an electromagnetic lock 32, the two cabinet doors 2 are controlled to open and close through the mechanical lock 31 and the electromagnetic lock 32, a plurality of personal body approaching sensors 4 are fixedly installed at the front end of the dry-type transformer casing 1, a control box 5 is fixedly installed above one side of the front end of the dry-type transformer casing 1, a judging and triggering control circuit 6 is fixedly installed at the inner side of the control box 5, an audible and visual alarm 7 is arranged above the control box 5, the audible and visual alarm 7 comprises two warning lamps 71, and the bottom ends of the two warning lamps 71 are respectively fixedly installed with two sides of, two buzzers 72 are arranged above the control box 5, and the bottom ends of the two buzzers 72 are fixedly mounted with the upper end of the control box 5.

And observation windows 8 are fixedly arranged at the upper parts of the two dry-type transformer shells 1.

The human body proximity sensors 4 are three, the three human body proximity sensors 4 are respectively located on two sides of the middle of the front end of the dry type transformer shell 1 and in the middle of the upper side of the front end of the dry type transformer shell, and the three human body proximity sensors 4 are electrically connected with the judgment trigger control circuit 6.

The mechanical lock 31 and the electromagnetic lock 32 are electrically connected with the determination trigger control circuit 6 through contacts.

The two warning lamps 71 and the two buzzers 72 are electrically connected with the judgment trigger control circuit 6.

The two buzzers 72 are located between the two warning lights 71.

As shown in fig. 1 to 3, the embodiment specifically is: when the cabinet door 2 normally runs, namely when the two cabinet doors 2 are normally closed, the audible and visual alarm 7 and the judgment trigger control circuit 6 are both in initial states, and when an operation and maintenance worker normally inspects that the cabinet door is close to the dry-type transformer, the audible and visual alarm 7 and related control signals cannot be triggered; when the front door is opened, firstly, the mechanical lock 31 and the electromagnetic lock 32 send position signals to the judging trigger control circuit 6, and simultaneously, a warning lamp 71 and a buzzer 72 are started to indicate warning; in the process, if the body parts (such as arms, heads and the like) of the operation and maintenance personnel enter the detection protection areas of the three human body proximity sensors 4, the human body proximity sensors 4 are triggered, send signals to the judgment trigger control circuit 6, and simultaneously start another warning lamp 71 and another buzzer 72 to strengthen warning; the judgment trigger control circuit 6 sends a 'brake-off power-off' signal to a main power supply loop of the transformer, and the miniature circuit breaker is used for carrying out power-off operation so as to protect operation and maintenance personnel who enter a detection protection range; the human body proximity sensor 4 (type: YTMW8631) is an automatic control product based on Doppler technical principle, adopts a non-contact detection mode, automatically switches on a load when a human body or a human body part (such as an arm, a head and the like) enters an induction range, can rapidly send a signal instruction to the judgment trigger control circuit 6 without pressure or spark, does not leave the monitoring induction range, continuously switches on the signal when the human body or the human body part does not leave the monitoring induction range, automatically switches off the signal after the signal leaves the monitoring induction range in a time delay way (the time delay can be set as required), the range of a monitoring control area is double-fan-shaped, the monitoring radius can be continuously adjusted within 0.0-5.0 meters so as to cover 0.5 meters beyond the edge of the dry-type transformer shell; the mechanical interlocking switch 3 adopts the traditional protection mode of the current dry-type transformer shell 1, the mechanical lock 31 can adopt a lever type or a rotating shaft type, the electromagnetic lock 32 can adopt direct current control or alternating current control and is provided with a contact, the position state of a door can be correctly displayed, and when the cabinet door 2 is opened, an opening state signal can be timely and accurately transmitted to the judging trigger control circuit 6 to serve as a preposed judging condition of a signal of the human body proximity sensor 4; the judging trigger control circuit judges that the trigger control circuit 6 carries out analysis and judgment after receiving signals sent by the mechanical interlocking switch 3 and the human body proximity sensor 4, when the two signals appear simultaneously and continue to set time at the same time, triggers a brake separating and power off signal and sends the signal to the miniature circuit breaker to carry out power off operation, meanwhile, sends the signal to the control center, if the human body or the human body part does not leave the control monitoring area, the signal is kept until the fault or dangerous case is eliminated, the condition of power supply recovery can be provided, namely, when the human body or the human body part (such as an arm, a head and the like) enters a dangerous area under the charged state of the transformer, the quick and timely alarming or power off operation can be effectively realized by taking the human body proximity sensor 4 as a main monitoring and triggering element and combining the mechanical interlocking switch 3, on the premise of ensuring the normal and stable operation of the dry-type power transformer, can ensure the security of operation personnel and maintenance personnel, furthest's reduction the emergence of this type of accident, this embodiment has specifically solved the unusual opening of dry-type power transformer cabinet door, adopts reputation alarm forms such as "bee calling organ" or "warning light" at present, can not go to direct power supply source that cuts off, if do not arouse that the operation and maintenance personnel enough attach attention to, or under the live working's of violating regulations the regulations circumstances, the problem of easy emergence accident.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to the common design, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

and finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a human body is close type protection of electric shock dry-type power transformer shell, includes dry-type transformer shell (1), its characterized in that: the dry-type transformer comprises a dry-type transformer shell (1), wherein cabinet doors (2) are hinged to two sides of the front of the dry-type transformer shell (1), a mechanical interlocking switch (3) is fixedly mounted in the middle between the two cabinet doors (2), the mechanical interlocking switch (3) comprises a mechanical lock (31) and an electromagnetic lock (32), the two cabinet doors (2) are controlled to be opened and closed through the mechanical lock (31) and the electromagnetic lock (32), a plurality of human body proximity sensors (4) are fixedly mounted at the front end of the dry-type transformer shell (1), a control box (5) is fixedly mounted above one side of the front end of the dry-type transformer shell (1), a judgment trigger control circuit (6) is fixedly mounted on the inner side of the control box (5), an acousto-optic alarm (7) is arranged above the control box (5), the acousto-optic alarm (7) comprises two warning lamps (71), and the bottoms of the two warning lamps (71) are fixedly mounted, two buzzers (72) are arranged above the control box (5), and the bottom ends of the two buzzers (72) are fixedly mounted with the upper end of the control box (5).

2. The human body approaching type electric shock preventing dry type power transformer protecting shell as claimed in claim 1, characterized in that: and observation windows (8) are fixedly arranged on the upper parts of the two dry-type transformer shells (1).

3. The human body approaching type electric shock preventing dry type power transformer protecting shell as claimed in claim 1, characterized in that: the three human body proximity sensors (4) are respectively positioned on two sides of the middle part of the front end of the dry-type transformer shell (1) and in the middle of the upper side of the front end, and the three human body proximity sensors (4) are electrically connected with the judgment trigger control circuit (6).

4. The human body approaching type electric shock preventing dry type power transformer protecting shell as claimed in claim 1, characterized in that: the mechanical lock (31) and the electromagnetic lock (32) are electrically connected with the judgment trigger control circuit (6) through contacts.

5. The human body approaching type electric shock preventing dry type power transformer protecting shell as claimed in claim 1, characterized in that: the two warning lamps (71) and the two buzzers (72) are electrically connected with the judging and triggering control circuit (6).

6. The human body approaching type electric shock preventing dry type power transformer protecting shell as claimed in claim 1, characterized in that: the two buzzers (72) are positioned between the two warning lamps (71).