CN110854726B - Box-type substation with relay protection function - Google Patents
Box-type substation with relay protection function Download PDFInfo
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- CN110854726B CN110854726B CN201911101807.3A CN201911101807A CN110854726B CN 110854726 B CN110854726 B CN 110854726B CN 201911101807 A CN201911101807 A CN 201911101807A CN 110854726 B CN110854726 B CN 110854726B
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- relay
- box
- voltage
- low
- protection function
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B7/00—Enclosed substations, e.g. compact substations
- H02B7/06—Distribution substations, e.g. for urban network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/015—Boards, panels, desks; Parts thereof or accessories therefor
- H02B1/04—Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
- H02B1/052—Mounting on rails
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
- H02B1/48—Mounting of devices therein
Abstract
The invention discloses a box-type substation with a relay protection function, which comprises a box body and a box door arranged on the front surface of the box body, wherein a low-voltage chamber, a variable-voltage chamber and a high-voltage chamber are sequentially arranged in the box body; this scheme is independently installed the relay in the relay maintenance room, consequently convenient maintains the relay frequently many times, avoids seeking in whole transformer assembly and maintains the relay, improves the simple convenient of relay maintenance work.
Description
Technical Field
The embodiment of the invention relates to the technical field of transformer stations, in particular to a box-type substation with a relay protection function.
Background
The transformer substation is a place for converting voltage and current, receiving electric energy and distributing electric energy in an electric power system. The substations in the power plant are step-up substations, which are used to boost up the electrical energy generated by the generator and feed it into the high-voltage network.
The box type transformer station is a typical representative of a transformer substation, is a high-voltage switch device, a distribution transformer and a low-voltage distribution device, is factory prefabricated indoor and outdoor compact distribution equipment which is integrated according to a certain wiring scheme, namely, the functions of transformer voltage reduction, low-voltage distribution and the like are organically combined together, and the box type transformer station is arranged on a steel structure box which is damp-proof, rust-proof, dust-proof, rat-proof, fire-proof, anti-theft, heat-insulating, totally-enclosed and movable, is particularly suitable for urban network construction and transformation, and is a brand-new transformer substation which rises after a civil transformer substation. The box-type transformer substation is suitable for mines, factory enterprises, oil-gas fields and wind power stations, replaces the original civil power distribution room and power distribution station, and becomes a novel complete set of power transformation and distribution device.
In order to ensure the safety performance of the transformer assembly of the box-type transformer station, the relay is often used for carrying out safety protection on the transformer assembly, but the existing relay also has the following defects:
because the relay breaks down relatively easily after long-term use, consequently need change often, but prior art is generally unified with the relay and is installed inside the transformer subassembly of box transformer station, and the operation that leads to changing the relay is inconvenient, is unfavorable for frequently repairing the relay.
Disclosure of Invention
Therefore, the embodiment of the invention provides a box-type substation with a relay protection function, which is characterized in that a relay maintenance room is divided from the space of the box-type transformer substation, and the relays are independently installed in the relay maintenance room, so that frequent maintenance of the relays is facilitated, the maintenance of the relays in the whole transformer assembly is avoided, the simplicity and convenience of the maintenance work of the relays are improved, and the problems that the operation of replacing the relays is inconvenient and the frequent maintenance of the relays is not facilitated in the prior art are solved.
In order to achieve the above object, an embodiment of the present invention provides the following: the utility model provides a box-type substation with relay protection function, is in including box and setting the positive chamber door of box be provided with low-pressure chamber, vary voltage room and hyperbaric chamber in the box in order, low-pressure subassembly in the low-pressure chamber with connect through the relay between the vary voltage subassembly in the vary voltage room, the vary voltage subassembly of vary voltage room with high-pressure chamber in connects, the relay sets up the low-pressure chamber with relay maintenance room between the vary voltage room relay maintenance room is just right respectively the low-pressure chamber with transversely be provided with the opening spout on the both sides wall of vary voltage room the back of box seted up with the maintenance door of relay maintenance room intercommunication, the relay along the opening spout slides.
As a preferable scheme of the present invention, a moisture-proof moving plate is disposed between the low pressure chamber and the open chutes on the two side walls of the variable pressure chamber, the relay is mounted on the upper surface of the moisture-proof moving plate through threads, the lower surface of the moisture-proof moving plate is provided with rollers that move on the bottom plate of the relay maintenance chamber, and the two sides of the moisture-proof moving plate are provided with inclined links that move along the open chutes.
As a preferred scheme of the invention, two side walls of the relay maintenance room facing the low-voltage chamber and the variable-voltage chamber are respectively and transversely provided with a take-up hollow cavity, a conducting wire led out by the low-voltage component and the variable-voltage component is accommodated in the take-up hollow cavity, two side walls of the low-voltage chamber and the variable-voltage chamber are respectively provided with a limiting hole for fixing the conducting wire, the inner end of the take-up hollow cavity is fixedly provided with a take-up spring tube, the conducting wires led out by the low-voltage component and the variable-voltage component respectively penetrate through the inner cavities of the two take-up spring tubes, and the conducting wire is provided with.
As a preferred scheme of the invention, the length of the conducting wire between the baffle ring and the limiting hole is the same as the maximum stretching length of the take-up spring tube, and marking wires are respectively arranged on the conducting wires led out from the low-voltage component and the voltage transformation component.
As a preferable scheme of the invention, the outer end of the wire-rewinding hollow cavity is provided with a smooth wire outlet, a position close to the smooth wire outlet is provided with a limiting wire clamp, and the limiting wire clamp fixes the conductive wire at the current stretching position.
As a preferable scheme of the invention, the relay comprises a protective shell mounted on the moisture-proof moving plate, and a hollow bottom plate arranged inside the protective shell, wherein an insulating control bridge is hinged on the hollow bottom plate, a compression spring is arranged on the upper surface of the hollow bottom plate at a position close to a hinged end of the insulating control bridge, the compression spring is connected with the lower surface of the insulating control bridge, a metal sheet is arranged at the middle position of the insulating control bridge, an electromagnet a for adsorbing the metal sheet is arranged inside the hollow bottom plate, an electrifying contact piece is arranged at an end part of the insulating control bridge far away from the hinged end, and binding posts connected with the input end of the transformer assembly and the output end of the generator are arranged on the hollow bottom plate.
As a preferable scheme of the present invention, after the electromagnet a is powered on, the electromagnet a adsorbs the metal sheet, the insulating control bridge rotates downward, the electrical connection of the transformer assembly is realized when the power contact is connected with the terminal, after the electromagnet a is powered off, the electromagnet a does not adsorb the metal sheet, the insulating control bridge rotates upward, and the power contact is disconnected from the terminal, so that the power off of the transformer assembly is realized.
As a preferable scheme of the present invention, the hollow bottom plate is further provided with a braking mechanism at a position close to the hinged end of the insulated control bridge, the braking mechanism is used for avoiding oscillation caused by resetting of the insulated control bridge, the braking mechanism includes vertical supporting plates arranged at two sides of the insulated control bridge, and the upper end of each vertical supporting plate is provided with a braking strip used for avoiding oscillation caused by resetting of the insulated control bridge.
In a preferred embodiment of the present invention, the insulating bridge has oblique cut grooves on two oblique side surfaces, and the surface of the brake strip has a brake strip with an inclination direction opposite to that of the oblique cut groove.
As a preferred scheme of the present invention, a power supply end of the electromagnet a is provided with a temperature control switch, the temperature control switch is connected to an overload monitoring system, and the overload monitoring system is configured to monitor a temperature change, a current change, and a voltage change of the transformer assembly in real time, and control the temperature control switch to be turned on and off according to a temperature value, a current value, and a voltage value of the transformer assembly.
The embodiment of the invention has the following advantages:
(1) according to the invention, the relay maintenance room is divided from the space of the box type transformer station, and the relay is independently installed in the relay maintenance room, so that frequent and repeated maintenance of the relay is facilitated, the maintenance relay is prevented from being searched in the whole transformer assembly, and the simplicity and convenience of the maintenance work of the relay are improved;
(2) in order to improve the heat dissipation effect of a high-voltage transformation area of the box-type transformer station, the space divided by the relay maintenance room is small, so that the maintenance operation of electricians is facilitated, the relay can be pulled out of the relay maintenance room for inspection and maintenance, and the implementation is simple;
(3) in order to facilitate the relay to be pulled out of the relay maintenance chamber, the low-voltage component lead and the variable-voltage component lead storage mechanisms are additionally arranged on the two sides of the relay maintenance chamber, so that the length of the lead pulled out of the relay maintenance chamber by the relay can be compensated, meanwhile, the pulled-out lead can be automatically sorted and stored, the lead is prevented from being damaged by friction, and the use safety performance is improved;
(4) when the relay is disconnected, in order to avoid potential safety hazards caused by oscillation of the electrified contact piece under the action of the spring, the braking mechanisms are specially arranged on the two sides of the insulation control bridge, when the insulation control bridge is reset to the original position, the braking action on the compression spring can be realized, the oscillation action of the compression spring is prevented, the service life of the relay is prolonged, the use safety is improved, and the maintenance times of the relay are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a schematic front view of a box body of a box type transformer station according to an embodiment of the present invention;
FIG. 2 is a schematic rear view of a box body of the box type transformer station according to the embodiment of the invention;
FIG. 3 is a schematic diagram of a relay mounting structure according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a relay maintenance room with a relay pulled out according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an overall structure of a relay according to an embodiment of the present invention;
FIG. 6 is a schematic side view of a relay braking mechanism according to an embodiment of the present invention;
fig. 7 is a block diagram of a relay operation control principle according to the embodiment of the present invention;
in the figure:
1-a box body; 2-a box door; 3-a low-pressure chamber; 4-a braking mechanism; 5-a temperature control switch; 6-overload monitoring system; 9-a relay; 10-a variable pressure chamber; 11-a high pressure chamber; 12-relay maintenance room; 13-open chute; 14-a service door; 15-damp-proof moving plate; 16-a roller; 17-a tilt link; 18-coiling a hollow cavity; 19-an electrically conductive wire; 20-limiting holes; 21-taking up a spring tube; 22-a baffle ring; 23-mark line; 24-smooth outlet holes; 25-limiting wire clamps;
401-vertical supporting plates; 402-brake bar; 403-oblique cutting groove; 404-brake bar;
901-a protective housing; 902-hollow floor; 903-an insulated control bridge; 904-compression spring; 905-electromagnet A; 906-power-on contact; 907-binding post; 908-metal sheet.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the referred devices or elements must have the specific orientations, be configured to operate in the specific orientations, and thus are not to be construed as limitations of the present invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example one
As shown in fig. 1, the invention provides a box-type substation with a relay protection function, and the invention divides the space of the box-type transformer substation into relay maintenance rooms, and the relays are independently installed in the relay maintenance rooms, thereby facilitating frequent maintenance of the relays, avoiding searching for the maintenance relays in the whole transformer assembly, and improving the simplicity and convenience of the maintenance work of the relays.
The box comprises a box body 1 and a box door 2 arranged on the front side of the box body 1, wherein a low-pressure chamber 3, a variable-pressure chamber 10 and a high-pressure chamber 11 are sequentially arranged in the box body 1, a low-pressure component in the low-pressure chamber 3 is connected with a variable-pressure component in the variable-pressure chamber 10 through a relay 9, and the variable-pressure component in the variable-pressure chamber 10 is connected with the high-pressure component in the high-pressure chamber 11.
The low-pressure chamber 3, the variable-pressure chamber 10 and the high-pressure chamber 11 do not necessarily divide the box body 1 into three independent compartments, but divide the box body 1 into three areas, and do not necessarily need to be divided into three small compartments by partition plates, so that the whole space of the box body 1 is large, and heat dissipation treatment is facilitated.
The transformer assembly overload operation of transformer can make the temperature rise, and the main factor that determines transformer life is insulating ageing degree, and the temperature plays decisive action to insulating ageing, and research result proves, and the temperature during insulating work is every when rising 8 ℃, and its life-span will reduce half.
As shown in FIG. 2, the relay 9 is added between the low voltage component and the transformer component, the operation condition of the transformer component can be controlled according to the overload condition of the transformer component, when the overload condition of the transformer component occurs, the operation of the transformer component can be stopped as long as the relay 9 is controlled to be switched off, the transformer component is prevented from being damaged, and the damage is stopped in time.
The relay 9 is arranged in a relay maintenance room 12 between the low-voltage room 3 and the transformation room 10, and the existing relay 9 is easy to break down after long-term use, so that the existing relay 9 needs to be replaced frequently, but the relay 9 is generally installed in a box type transformation station in a unified manner, so that the operation of replacing the relay is inconvenient, and the relay is not easy to repair frequently.
Therefore, as one of the main characteristic points of the invention, the invention divides the space of the box type transformer station into the relay maintenance room 12, and the relay 9 is independently installed in the relay maintenance room 12, so that frequent maintenance of the relay 9 is facilitated, the maintenance relay 9 is prevented from being searched in the whole transformer assembly, the simplicity and convenience of the maintenance work of the relay are improved, the maintenance relay 9 can be directly replaced in the relay maintenance room 12, the relay 9 does not need to be searched in the transformer assembly and the low-voltage assembly, and the maintenance efficiency and the safety performance of the relay 9 are improved.
Consequently, through the space with box transformer station division relay maintenance room 12 to install relay 9 independently in relay maintenance room 12, consequently make things convenient for the frequent multiple maintenance to relay 9, avoid looking for in whole transformer subassembly and maintain relay 9, improve the simple convenient of relay 9 maintenance work.
It should be noted that the box door 2 is disposed on the front surface of the box-type transformer box 1, and the maintenance door 14 is disposed on the back surface of the box-type transformer box 1, so that the box door 2 of the box 1 does not need to be opened when the maintenance relay 9 is replaced, and the opening and closing of the box door 2 and the maintenance door 14 do not affect each other.
Because the space divided by the low-voltage chamber 3 and the transformation chamber 10 is far larger than the space of the relay maintenance chamber 12 in order to improve the heat dissipation capacity of the low-voltage chamber 3 and the transformation chamber 10, exaggeratedly, the space of the relay maintenance chamber 12 only needs to accommodate the relay 9, so that the relay 9 can be directly pulled out from the relay maintenance chamber 12 for maintenance of the relay 9 conveniently, the operation is more convenient and simple, and the space of the box-type transformation station is utilized as much as possible.
As shown in fig. 3 and 4, a moisture-proof moving plate 15 is disposed between the open chutes 13 of the relay maintenance room 12, the relay 9 is mounted on the upper surface of the moisture-proof moving plate 15 through threads, rollers 16 moving on the bottom plate of the relay maintenance room 12 are disposed on the lower surface of the moisture-proof moving plate 15, and inclined links 17 moving along the open chutes 13 are disposed on both sides of the moisture-proof moving plate 15.
Generally speaking, when the relay 9 is directly placed in the relay maintenance room 12, if the position of the relay maintenance room 12 is inclined downward, the relay 9 is easily affected by humid air, so the relay 9 is installed on the upper surface of the moisture-proof movable plate 15 through threads, a certain moisture-proof function can be achieved, the moisture-proof movable plate 15 is fixedly arranged on two side walls of the relay maintenance room 12 through the inclined connecting rod 17, the moisture-proof movable plate 15 can be prevented from moving freely in the relay maintenance room 12, and the wiring stability of the relay 9 is prevented from being affected by displacement.
The low-voltage chamber 3 and the two side walls of the voltage transformation chamber 10 are respectively and transversely provided with a wire collecting hollow cavity 18 in the relay maintenance chamber 12, a conducting wire 19 led out by the low-voltage component and the voltage transformation component is contained in the wire collecting hollow cavity 18, the conducting wire 19 led out by the low-voltage component and the voltage transformation component is respectively connected with a wiring terminal of the relay 9, and the two side walls of the low-voltage chamber 3 and the voltage transformation chamber 10 are respectively and rightly provided with a limiting hole 20 for fixing the conducting wire 19 in the relay maintenance chamber 12.
The inner end of the take-up hollow cavity 18 is fixedly provided with a take-up spring tube 21, the electric leads 19 led out by the low-voltage component and the voltage transformation component respectively penetrate through the inner cavities of the two take-up spring tubes 21, and the electric leads 19 are provided with retaining rings 22.
Therefore, as the second main characteristic point of the present invention, the conductive wire 19 connected to the relay 9 of the present invention can be stretched, so that the relay 9 can be pulled out from the relay maintenance room 12 for maintenance, thereby further reducing the occupied area of the relay maintenance room 12, expanding the occupied area of the transformer assembly, and improving the heat dissipation efficiency.
The specific installation and use of the relay 9 is as follows:
1. the conductive wire 19 led out by the low-voltage component and the conductive wire 19 led out by the voltage transformation component are stored in the wire take-up hollow cavity 18, the conductive wires 19 are respectively connected with two binding posts of the relay 9, and the limiting hole 20 limits the length of the conductive wire 19 in the wire take-up hollow cavity 18, namely, the moving position of the relay 9 is limited by the length of the conductive wire 19;
2. the conducting wire 19 is pulled outwards from a smooth wire outlet hole 24 at the front end of the wire take-up hollow cavity 18, a baffle ring 22 on the conducting wire 19 pulls a wire take-up spring tube 21 to extend, and the conducting wire 19 is pulled outwards to the maximum length until a mark line 23 appears on the conducting wires led out by the low-voltage component and the voltage transformation component, and at the moment, the maximum moving position of the relay 9 is represented;
3. the limit clamp 25 is used for clamping the conducting wire 19, the conducting wire 19 is fixed at the current stretching position, the moisture-proof moving plate 15 is pulled out from the relay maintenance room 12, and the relay 9 is maintained outside the relay maintenance room 12.
It should be specially noted that the length of the conductive wire 19 between the retaining ring 22 and the limiting hole 20 is the same as the maximum stretching length of the take-up spring tube 19, when the conductive wire 19 is stretched to the position of the marking line 23, the take-up spring tube 19 is at the maximum stretching length, and when no external pulling force is applied to the conductive wire 19, the take-up spring tube 19 pulls the conductive wire 19 to be accommodated in the take-up hollow cavity 18 again due to the self-rebound force.
Therefore, as a third main feature point of the present invention, in the present embodiment, by adding the receiving mechanisms for the low voltage component wires and the transformer component wires on the two side walls of the relay maintenance room 12, the length of the wires pulled out from the relay maintenance room 12 by the relay 9 can be compensated, and the pulled out wires can be automatically sorted and received, so as to prevent the wires from being damaged by friction, and improve the safety performance in use.
Example two
As shown in fig. 5, the relay 9 for realizing the transformer safety control of the box-type transformer station according to the present invention will be described in detail below, and is an electric appliance in which a controlled amount is changed in a predetermined step in an electric output circuit when a change in an input amount (excitation amount) meets a predetermined requirement. It has an interactive relationship between a control system (also called an input loop) and a controlled system (also called an output loop). It is commonly used in automated control circuits, which are actually a "recloser" that uses low current to control high current operation. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like.
The relay 9 comprises a protective casing 901 and a hollow bottom plate 902 arranged inside the protective casing 901, wherein an insulating control bridge 903 is hinged on the hollow bottom plate 901, a compression spring 904 is arranged on the upper surface of the hollow bottom plate 902 at the position close to the hinged end of the insulating control bridge 903, and the compression spring 904 is connected with the lower surface of the insulating control bridge 903.
A metal sheet 908 is arranged in the middle of the insulating electric control bridge 903, an electromagnet A905 for adsorbing the metal sheet 908 is arranged in the hollow bottom plate 902, an electrified contact sheet 906 is arranged at the end part of the insulating electric control bridge 903 far away from the hinged end, a binding post 907 connected with the input end of the transformer assembly and the output end of the generator is arranged on the hollow bottom plate 902, and the electrified contact sheet 906 is connected with the binding post 907 to realize electric quantity transmission.
After the electromagnet A905 is electrified, the electromagnet A905 adsorbs the metal sheet 904, the insulating control bridge 903 rotates downwards, the electric connection of the transformer assembly is realized when the electrifying contact piece 906 is connected with the wiring terminal 907, after the electromagnet A905 is powered off, the electromagnet A905 does not adsorb the metal sheet 904, the insulating control bridge 903 rotates upwards, and the electrifying contact piece 906 is disconnected with the wiring terminal 907, so that the power off of the transformer assembly is realized.
As shown in fig. 5 and 7, a temperature-controlled switch 5 is disposed at a power supply end of the electromagnet a905, the temperature-controlled switch 5 is connected with an overload monitoring system 6, and the overload monitoring system 6 is used for monitoring the working current, voltage and working temperature of the low-voltage component, the voltage transformation component and the high-voltage component in real time and controlling the on and off of the temperature-controlled switch 5 according to the temperature of the transformer component.
When the working current, voltage and working temperature parameters of the low-voltage component, the transformation component and the high-voltage component are all within normal threshold values, the overload monitoring system 6 controls the temperature control switch 5 to be closed, when the electromagnet A905 is electrified, the electromagnet A905 adsorbs a metal sheet 908 of the insulating control bridge 903, the insulating control bridge 903 rotates around the hinged position and downwards presses the compression spring 904, the through electric contact piece 906 is in contact with the wiring terminal 907 to form an electrified loop at the input end of the transformer component, the transformer component normally works, and the compression spring 904 at the moment is pressed and has rebound force.
When the working current, voltage or working temperature parameters of the low-voltage component, the transformation component and the high-voltage component exceed normal threshold values respectively, the overload monitoring system 6 controls the temperature control switch 5 to be switched off, when the electromagnet A905 is not electrified, the electromagnet A905 does not adsorb the metal sheet 908 of the insulating control bridge 903 any more, the insulating control bridge 903 rotates reversely around the hinged position to reset under the action of the compression spring 904, the electrifying contact sheet 906 is not in contact with the wiring terminal 907, an electrifying loop between the low-voltage component and the transformation component is switched off, and the work of the transformer component is stopped.
The overload monitoring system 6 further controls the temperature control switch 5 to be automatically switched on or switched off, when the temperature of the components in the transformer station is reduced from high temperature to be less than a set threshold value and normal parameters are recovered, the overload monitoring system 6 controls the temperature control switch 5 to be switched on, and when the temperature of the transformer components is greater than the set threshold value, the overload monitoring system 6 controls the temperature control switch 5 to be automatically switched off again.
As shown in fig. 6, since the insulating bridge 903 oscillates when the compression spring 904 is reset, the disconnection between the conductive contact 906 and the terminal 907 is unstable, and there is a safety risk, and therefore, in order to ensure the stability of the insulating bridge 903 when it is reset, a braking mechanism 4 is further provided at a position of the hollow bottom plate 902 of the present embodiment near the hinged end of the insulating bridge 903.
The braking mechanism 4 avoids oscillation generated by resetting of the insulating control bridge 903, the braking mechanism 4 comprises vertical supporting plates 401 arranged on two sides of the insulating control bridge 903, braking strips 402 used for avoiding oscillation of resetting of the insulating control bridge 903 are arranged at the upper ends of the vertical supporting plates 401, oblique cutting grooves 403 are formed in two side faces of the insulating control bridge 903, and braking tooth strips 404 with the inclination directions opposite to those of the oblique cutting grooves 403 are arranged on the surfaces of the braking strips 402.
Therefore, when the insulating control bridge 903 is reset, the height of the insulating control bridge 903 rises, the section of the contact position of the insulating control bridge 903 and the brake bar 402 is trapezoidal, and the inner side surface of the brake bar 402 is parallel to the section of the insulating control bridge 903, so that when the insulating control bridge 903 is reset to the original position, the brake rack bars 404 on the inner side surface of the brake bar 402 are just matched with the inclined cutting grooves 403 on the two side surfaces of the insulating control bridge 903, the braking effect on the compression spring 904 can be realized, and the oscillation effect of the compression spring 904 is prevented.
Because the brake rack 404 and the inclined cutting groove 403 are mutually clamped, the brake compression spring 904 is continuously stretched, the compression spring 904 is ensured to be reset to the original position, and the clamping mode of the brake rack 404 and the inclined cutting groove 403 does not influence the downward rotation of the insulated control bridge 903, so that the normal adsorption action of the electromagnet A905 is not hindered.
Therefore, as the fourth main characteristic point of the present invention, in order to avoid the potential safety hazard caused by the oscillation of the energized contact 906 under the action of the spring when the relay is disconnected, the present invention is characterized in that braking mechanisms are arranged on two sides of the insulated control bridge 903, and when the insulated control bridge 903 is reset to the original position, the braking action on the compression spring 904 can be realized, the oscillation action of the compression spring 904 is prevented, and the overall safety performance of the box type transformer station is improved.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The utility model provides a box-type substation with relay protection function, is in including box (1) and setting box (1) positive chamber door (2) be provided with low-pressure chamber (3), vary voltage room (10) and hyperbaric chamber (11) in box (1) in order, low-voltage component in low-pressure chamber (3) with connect through relay (9) between the vary voltage subassembly in vary voltage room (10), the vary voltage subassembly in vary voltage chamber (10) with hyperbaric chamber (11) in high-voltage chamber connect its characterized in that: relay (9) set up low-pressure chamber (3) with in relay maintenance room (12) between vary voltage room (10) relay maintenance room (12) just right respectively low-pressure chamber (3) with transversely be provided with opening spout (13) on the both sides wall of vary voltage room (10) the back of box (1) seted up with maintenance door (14) of relay maintenance room (12) intercommunication, relay (9) along opening spout (13) slide.
2. The box-type substation with the relay protection function according to claim 1, characterized in that: low-pressure chamber (3) with be equipped with dampproofing movable plate (15) between opening spout (13) of variable pressure chamber (10) both sides wall, upper surface at dampproofing movable plate (15) is installed through the screw thread in relay (9), the lower surface of dampproofing movable plate (15) is equipped with gyro wheel (16) that move on relay maintenance room (12) bottom plate, the both sides of dampproofing movable plate (15) are equipped with slope connecting rod (17) that move along opening spout (13).
3. The box-type substation with the relay protection function according to claim 2, characterized in that: relay maintenance room (12) just right low-pressure chamber (3) with still transversely be provided with respectively on the both sides wall of vary voltage room (10) and receive line cavity (18), conductor wire (19) that low pressure subassembly and vary voltage subassembly were drawn are accomodate in receiving line cavity (18), and low-pressure chamber (3) with be equipped with spacing hole (20) that are used for fixed conductor wire (19) on the both sides wall of vary voltage room (10) respectively, receive the inner fixed mounting of line cavity (18) and receive line spring pipe (21), conductor wire (19) that low pressure subassembly and vary voltage subassembly were drawn pass two inside cavities of receiving line spring pipe (21) respectively, be equipped with fender ring (22) on conductor wire (19).
4. The box-type substation with the relay protection function according to claim 3, characterized in that: the length of the conducting wire (19) between the baffle ring (22) and the limiting hole (20) is the same as the maximum stretching length of the take-up spring tube (19), and marking wires (23) are respectively arranged on the conducting wires led out by the low-voltage component and the voltage transformation component.
5. The box-type substation with the relay protection function according to claim 3, characterized in that: the outer end of the take-up hollow cavity (18) is provided with a smooth wire outlet hole (24), a limiting wire clamp (25) is arranged at a position close to the smooth wire outlet hole (24), and the limiting wire clamp (25) fixes the conductive wire (19) at the current stretching position.
6. The box-type substation with the relay protection function according to claim 1, characterized in that: the relay (9) comprises a protective shell (901) arranged on a moisture-proof moving plate (15), and a hollow bottom plate (902) arranged in the protective shell (901), wherein an insulating control bridge (903) is hinged on the hollow bottom plate (902), the upper surface of the hollow bottom plate (902) is provided with a compression spring (904) at the position close to the hinged end of the insulated control bridge (903), the compression spring (904) is connected with the lower surface of the insulated control bridge (903), a metal sheet (908) is arranged in the middle of the insulating control bridge (903), an electromagnet A (905) for adsorbing the metal sheet (908) is arranged in the hollow bottom plate (902), the end part of the insulation control bridge (903) far away from the hinged end is provided with an electrified contact piece (906), and the hollow bottom plate (902) is provided with binding posts (907) which are respectively connected with the input end of the transformer assembly and the output end of the generator.
7. The box-type substation with the relay protection function according to claim 6, characterized in that: after the electromagnet A (905) is electrified, the electromagnet A (905) adsorbs a metal sheet (908), the insulating control bridge (903) rotates downwards, the electrifying contact piece (906) is connected with the wiring terminal (907) to achieve electric connection of the transformer assembly, after the electromagnet A (905) is powered off, the electromagnet A (905) does not adsorb the metal sheet (908), the insulating control bridge (903) rotates upwards, and the electrifying contact piece (906) is disconnected with the wiring terminal (907) to achieve power off of the transformer assembly.
8. The box-type substation with the relay protection function according to claim 6, characterized in that: the hollow bottom plate (902) is still equipped with brake mechanism (4) in the hinged end position that is close to insulating accuse electric bridge (903), brake mechanism (4) are used for avoiding insulating accuse electric bridge (903) to reset the oscillation that takes place, brake mechanism (4) are including setting up vertical fagging (401) in insulating accuse electric bridge (903) both sides, the upper end of vertical fagging (401) is equipped with and is used for avoiding insulating accuse electric bridge (903) to reset brake strip (402) of oscillation.
9. The box-type substation with the relay protection function according to claim 8, characterized in that: inclined cutting grooves (403) are formed in the two inclined side faces of the insulating control bridge (903), and braking strips (404) with the inclination directions opposite to those of the inclined cutting grooves (403) are arranged on the surfaces of the braking strips (402).
10. The box-type substation with the relay protection function according to claim 6, characterized in that: the power end of electro-magnet A (905) is equipped with temperature detect switch (5), temperature detect switch (5) are connected with overload monitored control system (6), overload monitored control system (6) are used for the temperature variation, the current variation and the voltage variation of real-time supervision transformer subassembly to according to the temperature value, the current value and the closing and the disconnection of voltage value control temperature detect switch (5) of transformer subassembly.
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| CN201911101807.3A CN110854726B (en) | 2019-11-12 | 2019-11-12 | Box-type substation with relay protection function |
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| CN201911101807.3A CN110854726B (en) | 2019-11-12 | 2019-11-12 | Box-type substation with relay protection function |
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| CN110854726B true CN110854726B (en) | 2020-09-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112203447B (en) * | 2020-09-25 | 2021-12-10 | 无锡子可科技有限公司 | Intelligent security equipment cabinet |
| WO2023155942A1 (en) * | 2023-05-17 | 2023-08-24 | 安徽陆泰电气科技有限公司 | High-temperature circuit break protection device for electrical apparatus |
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| CN110854726A (en) | 2020-02-28 |
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