CN110854726B - A box-type substation with relay protection function - Google Patents

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

A box-type substation with relay protection function

technical field

The embodiments of the present invention relate to the technical field of transformer substations, and in particular, to a box-type transformer substation with a relay protection function.

Background technique

A substation is a place in the power system that converts voltage and current, receives and distributes electrical energy. The substation in the power plant is a step-up substation, and its function is to boost the power generated by the generator and feed it to the high-voltage grid.

Box-type transformer substation is a typical representative of substation. It is a kind of high-voltage switchgear, distribution transformer and low-voltage power distribution device. It is a factory-prefabricated indoor and outdoor compact power distribution device that is arranged according to a certain wiring scheme. The functions of voltage and low-voltage power distribution are organically combined and installed in a moisture-proof, rust-proof, dust-proof, rodent-proof, fireproof, anti-theft, heat-insulating, fully enclosed, movable steel structure box, especially suitable for urban network construction. It is a brand-new substation that has emerged after the civil substation. Box-type substations are suitable for mines, factories, oil and gas fields and wind power stations.

In order to ensure the safety performance of the transformer components of the box-type transformer substation, relays are often used to protect the transformer components, but the existing relays still have the following defects:

Since the relay is prone to failure after long-term use, it needs to be replaced frequently. However, in the prior art, the relay is usually installed inside the transformer assembly of the box-type transformer substation, which makes the operation of replacing the relay inconvenient and is not conducive to the frequent repair of the relay. protect.

SUMMARY OF THE INVENTION

To this end, the embodiments of the present invention provide a box-type substation with a relay protection function. The space of the box-type substation is divided into a relay maintenance room, and the relays are independently installed in the relay maintenance room, so it is convenient to Frequent and multiple maintenance of the relay avoids searching and maintaining the relay in the entire transformer assembly, improves the simplicity and convenience of the relay maintenance work, and solves the inconvenient operation of replacing the relay in the prior art, which is not conducive to the frequent maintenance of the relay.

In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions: a box-type substation with a relay protection function, comprising a box body and a box door arranged on the front of the box body, and sequentially arranged in the box body There are a low-voltage chamber, a transformer chamber and a high-voltage chamber, the low-voltage components in the low-voltage chamber are connected with the transformer components in the transformer chamber through relays, and the transformer components in the transformer chamber are connected with the high-voltage components in the high-voltage chamber. The components are connected, the relay is arranged in the relay maintenance room between the low-voltage room and the transformer room, and the relay maintenance room faces the two side walls of the low-voltage room and the transformer room respectively. An open chute is arranged horizontally on the upper side, a maintenance door communicated with the relay maintenance room is opened on the back of the box body, and the relay slides along the open chute.

As a preferred solution of the present invention, a moisture-proof moving plate is provided between the low-voltage chamber and the opening chute on the two side walls of the transformer chamber, and the relay is mounted on the upper surface of the moisture-proof moving plate by means of threads. The lower surface of the moisture-proof moving plate is provided with rollers that move on the bottom plate of the relay maintenance room, and the two sides of the moisture-proof moving plate are provided with inclined connecting rods that move along the opening chute.

As a preferred solution of the present invention, the two side walls of the relay maintenance room facing the low-voltage room and the transformer room are also provided with hollow cavities for wire take-up, respectively. The conductive wire drawn from the assembly is stored in the wire take-up hollow cavity, and the two side walls of the low-voltage chamber and the transformer chamber are respectively provided with limit holes for fixing the conductive wire, and the inner end of the wire take-up hollow cavity A wire take-up spring tube is fixedly installed, the conductive wires drawn from the low-voltage component and the voltage transformer assembly respectively pass through the inner cavities of the two wire take-up spring tubes, and a blocking ring is provided on the conductive wire.

As a preferred solution of the present invention, the length of the conductive wire between the stop ring and the limit hole is the same as the maximum stretched length of the take-up spring tube, and the conductive wires drawn from the low-voltage component and the transformer component are respectively With marking lines.

As a preferred solution of the present invention, a smooth wire outlet hole is provided at the outer end of the wire take-up cavity, and a limit wire clip is arranged near the smooth wire outlet hole, and the limit wire clip fixes the conductive wire in the current position stretch position.

As a preferred solution of the present invention, the relay includes a protective casing mounted on the moisture-proof moving plate, and a hollow bottom plate arranged inside the protective casing, an insulating control bridge is hinged on the hollow bottom plate, and the hollow bottom plate is provided with an insulating control bridge. The upper surface is provided with a compression spring at a position close to the hinge end of the insulation control bridge, the compression spring is connected with the lower surface of the insulation control bridge, a metal sheet is arranged in the middle of the insulation control bridge, and the hollow The inside of the bottom plate is provided with an electromagnet A for attracting metal sheets, the insulation control bridge is provided with an electrified contact piece at the end away from the hinged end, and the hollow bottom plate is provided with the input end of the transformer assembly and the output end of the generator respectively. connection post.

As a preferred solution of the present invention, after the electromagnet A is energized, the electromagnet A absorbs the metal sheet, the insulation control bridge rotates downward, and the transformer assembly is realized when the energized contact piece is connected to the terminal. After the electromagnet A is powered off, the electromagnet A does not attract the metal sheet, the insulating control bridge rotates upward, and the energized contact piece is disconnected from the terminal, that is, the transformer assembly is realized. power outage.

As a preferred solution of the present invention, the hollow bottom plate is further provided with a braking mechanism at a position close to the hinge end of the insulation control bridge, and the braking mechanism is used to avoid oscillation caused by the reset of the insulation control bridge. The moving mechanism includes vertical support plates arranged on both sides of the insulation control bridge, and the upper end of the vertical support plate is provided with a braking strip for preventing the reset oscillation of the insulation control bridge.

As a preferred solution of the present invention, inclined cutting grooves are provided on the inclined two sides of the insulating control bridge, and braking strips opposite to the inclined direction of the inclined cutting groove are provided on the surface of the braking strip.

As a preferred solution of the present invention, the power supply end of the electromagnet A is provided with a temperature control switch, and the temperature control switch is connected with an overload monitoring system, and the overload monitoring system is used for real-time monitoring of temperature changes and currents of transformer components. Changes and voltage changes, and control the closing and opening of the temperature control switch according to the temperature value, current value and voltage value of the transformer components.

Embodiments of the present invention have the following advantages:

(1) The present invention divides the space of the box-type transformer station into a relay maintenance room, and installs the relay in the relay maintenance room independently, so it is convenient for frequent and multiple maintenance of the relay and avoids searching for maintenance in the entire transformer assembly. Relays, improve the simplicity and convenience of relay maintenance;

(2) In order to improve the heat dissipation effect of the high-voltage substation area of the box-type transformer substation, the space divided by the relay maintenance room is very small. In order to facilitate the maintenance operation of electricians, the present invention can pull the relay out of the relay maintenance room for Inspection and maintenance, easy to implement;

(3) In the present invention, in order to facilitate pulling the relay out of the relay maintenance room, storage mechanisms for low-voltage component wires and transformer component wires are added on both sides of the relay maintenance room, which can compensate for the length of the wires pulled out of the relay maintenance room by the relay. At the same time, the pulled wires can be automatically arranged and stored to prevent the wires from being damaged by friction and improve the safety performance;

(4) In the present invention, when the relay is disconnected, in order to avoid the potential safety hazard caused by the oscillation of the electrified contact piece under the action of the spring, braking mechanisms are specially arranged on both sides of the insulation control bridge. In the original position, the braking effect of the compression spring can be realized, the oscillation effect of the compression spring can be prevented, the service life of the relay can be improved, the safety of use can be increased, and the maintenance times of the relay can be reduced.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, other implementation drawings can also be obtained according to the extension of the drawings provided without creative efforts.

The structures, proportions, sizes, etc. shown in this specification are only used to cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with the technology, and are not used to limit the conditions for the implementation of the present invention, so there is no technical The substantive meaning above, any modification of the structure, the change of the proportional relationship or the adjustment of the size should still fall within the technical content disclosed in the present invention without affecting the effect and the purpose that the present invention can produce. within the range that can be covered.

Fig. 1 is the front view structure schematic diagram of the box body of the box-type transformer station in the embodiment of the present invention;

Fig. 2 is the rear view structure schematic diagram of the box body of the box-type transformer station in the embodiment of the present invention;

FIG. 3 is a schematic diagram of a relay installation structure in an embodiment of the present invention;

4 is a schematic structural diagram of a relay pull-out relay maintenance room in an embodiment of the present invention;

5 is a schematic diagram of the overall structure of the relay in the embodiment of the present invention;

6 is a schematic side view of the structure of the relay braking mechanism in the embodiment of the present invention;

7 is a structural block diagram of a relay working control principle in an embodiment of the present invention;

In the picture:

1-box body; 2-box door; 3-low pressure room; 4-braking mechanism; 5-temperature control switch; 6-overload monitoring system; 9-relay; 10-transformer room; 11-high pressure room; 12- Relay maintenance room; 13-opening chute; 14-maintenance door; 15-moisture-proof moving plate; 16-roller; 17-inclined connecting rod; 18-wire take-up hollow cavity; 19-conductive wire; 21- take-up spring tube; 22- stop ring; 23- mark line; 24- smooth wire outlet hole; 25- limit wire clamp;

401-vertical support plate; 402-braking strip; 403-inclined cutting groove; 404-braking strip;

901-Protective shell; 902-Hollow base plate; 903-Insulation control bridge; 904-Compression spring; 905-Electromagnet A;

Detailed ways

In order to make the purposes, features and advantages of the present invention more obvious and understandable, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the following description The embodiments described above are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be co-located components at the same time. When a component is considered to be "set on" another component, it can be set directly on the other component or there may be a centered set of components at the same time.

In addition, the terms "long", "short", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention, rather than indicating or implying the referred device. Or the original must have this specific orientation and operate in a specific orientation configuration, which should not be construed as a limitation of the present invention.

The technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.

Example 1

As shown in FIG. 1 , the present invention provides a box-type substation with a relay protection function. The present invention divides the space of the box-type substation into a relay maintenance room, and independently installs the relay in the relay maintenance room. , so it is convenient to maintain the relay frequently and repeatedly, avoid searching and maintaining the relay in the whole transformer assembly, and improve the simplicity and convenience of the maintenance work of the relay.

Specifically, it includes a box body 1 and a box door 2 arranged on the front of the box body 1 . A low-pressure chamber 3 , a transformer chamber 10 and a high-pressure chamber 11 are sequentially arranged in the box body 1 . The low-voltage components are connected with the transformer components in the transformer chamber 10 through the relay 9 , and the transformer components in the transformer chamber 10 are connected with the high-voltage components in the high-voltage chamber 11 .

In addition, the low pressure chamber 3, the transformer chamber 10 and the high pressure chamber 11 do not necessarily isolate the box 1 into three independent compartments, but divide the box 1 into three areas, which do not necessarily need to be separated by partitions. It is divided into three small compartments, so the overall space of the box 1 is large, which is convenient for heat dissipation.

The overload operation of the transformer components of the transformer will increase the temperature. The main factor that determines the service life of the transformer is the aging degree of the insulation, and the temperature plays a decisive role in the aging of the insulation. , its lifespan is reduced by half.

As shown in Fig. 2, therefore, the present invention adds a relay 9 between the low-voltage assembly and the transformer assembly, which can control the operation of the transformer assembly according to the overload condition of the transformer assembly. When the transformer assembly is overloaded, as long as the control When the relay 9 is disconnected, the operation of the transformer assembly can be stopped, so as to avoid damage to the transformer assembly and stop the loss in time.

The relay 9 is arranged in the relay maintenance room 12 between the low-voltage room 3 and the transformer room 10. Since the existing relay 9 is prone to failure after long-term use, it needs to be replaced frequently, but the relay 9 is usually installed in the box. The operation of replacing the relay is inconvenient, and it is not conducive to the frequent maintenance of the relay.

Therefore, as one of the main features of the present invention, the present invention divides the space of the box-type transformer station into the relay maintenance room 12, and independently installs the relay 9 in the relay maintenance room 12, so it is convenient for the maintenance of the relay 9. Frequent and multiple maintenance, avoid searching for the maintenance relay 9 in the entire transformer assembly, improve the simplicity and convenience of the relay maintenance work, and replace the maintenance relay 9 directly in the relay maintenance room 12 instead of searching for the relay in the transformer assembly and the low-voltage assembly. 9. Improve the maintenance efficiency and safety performance of the relay 9.

Therefore, by dividing the space of the box-type transformer station into the relay maintenance room 12, and installing the relay 9 in the relay maintenance room 12 independently, it is convenient to maintain the relay 9 frequently and repeatedly, and avoid searching in the entire transformer assembly. Maintaining the relay 9 improves the simplicity and convenience of the maintenance work of the relay 9 .

On the two side walls of the relay maintenance room 12 facing the low-voltage room 3 and the transformer room 10 respectively, there are laterally provided opening chutes 13 , and on the back of the box body 1 are provided with the relay maintenance The maintenance door 14 communicates with the chamber 12 , and the relay 9 slides along the opening chute 13 .

In addition, it should be added that the box door 2 is arranged on the front of the box-type transformer box 1, and the maintenance door 14 is arranged on the back of the box-type transformer box 1. Therefore, when replacing the maintenance relay 9, there is no need to open the box of the box body 1. The opening and closing of the door 2, the box door 2 and the maintenance door 14 do not affect each other.

In order to improve the heat dissipation capacity of the low-voltage room 3 and the transformer room 10, the space divided between the low-voltage room 3 and the transformer room 10 is much larger than the space of the relay maintenance room 12. It is exaggerated to say that the space requirement of the relay maintenance room 12 is only It is enough to accommodate the relay 9. Therefore, in order to facilitate the maintenance of the relay 9, the relay 9 of the present invention can be directly pulled out from the relay maintenance room 12 for maintenance, and the operation is more convenient and simple. At the same time, the box-type transformer station is used as much as possible. Space.

As shown in FIG. 3 and FIG. 4 , a moisture-proof moving plate 15 is provided between the opening chute 13 of the relay maintenance room 12 , the relay 9 is installed on the upper surface of the moisture-proof moving plate 15 through threads, and the lower part of the moisture-proof moving plate 15 The surface is provided with rollers 16 that move on the bottom plate of the relay maintenance room 12 , and the two sides of the moisture-proof moving plate 15 are provided with inclined links 17 that move along the opening chute 13 .

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 lower, the relay 9 is easily affected by humid air. Therefore, the present invention installs the relay 9 on the moisture-proof moving plate 15 through threads. It can play a certain moisture-proof function. The moisture-proof moving plate 15 is fixedly arranged on the two side walls of the relay maintenance room 12 through the inclined connecting rod 17, which can prevent the moisture-proof moving plate 15 from moving arbitrarily in the relay maintenance room 12. , to prevent the displacement from affecting the wiring stability of the relay 9.

On the two side walls of the relay maintenance room 12 facing the low voltage chamber 3 and the transformer chamber 10 respectively, there are also horizontally provided wire take-up hollow cavities 18, and the conductive wires 19 drawn from the low voltage assembly and the transformer assembly It is stored in the cavity 18 of the wire take-up, the conductive wires 19 drawn from the low-voltage components and the transformer components are respectively connected to the terminals of the relay 9, and the relay maintenance room 12 is facing the low-voltage room 3 and the transformer room. Limiting holes 20 for fixing the conductive wires 19 are respectively provided on the two side walls of the 10 .

A wire take-up spring tube 21 is fixedly installed at the inner end of the wire take-up hollow cavity 18 , and the conductive wires 19 drawn from the low-voltage component and the transformer assembly pass through the inner cavities of the two wire take-up spring tubes 21 respectively, and the conductive wire 19 There is a retaining ring 22 on it.

Therefore, as the second main feature of the present invention, the conductive wire 19 connected to the relay 9 of the present invention can be stretched, so the relay 9 can be pulled out of the relay maintenance room 12 for maintenance, so the relay maintenance room 12 can be further reduced. It can expand the occupied area of transformer components and improve the heat dissipation efficiency.

The specific installation and use methods of relay 9 are as follows:

1. Store the conductive wire 19 drawn from the low-voltage component and the conductive wire 19 drawn from the transformer assembly in the cavity 18 of the wire take-up, and connect the conductive wire 19 to the two terminals of the relay 9 respectively, and the limit hole 20 limits the retraction. The length of the conductive wire 19 inside the cavity 18 in the wire, that is to say, the moving position of the relay 9 is limited by the length of the conductive wire 19;

2. Pull the conductive wire 19 outward from the smooth outlet hole 24 at the front end of the cavity 18 of the wire take-up, the retaining ring 22 on the conductive wire 19 pulls the wire take-up spring tube 21 to extend, and stretches the conductive wire 19 outward to the maximum length, Until the marked line 23 appears on the conductive lines drawn from the low-voltage component and the transformer component, it indicates the maximum moving position of the relay 9;

3. Use the limit clip 25 to clamp the conductive wire 19, fix the conductive wire 19 in the current stretched position, pull out the moisture-proof moving plate 15 from the relay maintenance room 12, and face the relay outside the relay maintenance room 12. 9 for maintenance.

It should be noted that the length of the conductive wire 19 between the stop ring 22 and the limit hole 20 is the same as the maximum stretched length of the wire take-up spring tube 19. When the conductive wire 19 is pulled to the position of the marking line 23, the wire take-up spring When the tube 19 is at the maximum stretched length, 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 re-stored in the wire take-up hollow cavity 18 due to its own rebound force.

Therefore, as the third main feature of the present invention, in this embodiment, by adding storage mechanisms for the wires of the low-voltage components and the wires of the transformer components on the two side walls of the relay maintenance room 12, it is possible to compensate for the fact that the relay 9 is pulled out of the relay maintenance room 12. The length of the wire can be automatically sorted and stored to prevent the wire from being damaged by friction and improve the safety performance.

Embodiment 2

As shown in FIG. 5 , the relay 9 for realizing the safety control of the transformer in the box-type transformer station of the present invention will be described in detail below. When the change of the input quantity (excitation quantity) reaches the specified requirements, the controlled quantity is made in the electrical output circuit. An electrical appliance that undergoes a predetermined step change. It has an interactive relationship between the control system (also known as the input loop) and the controlled system (also known as the output loop). Usually used in automated control circuits, it is actually an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit.

The relay 9 includes a protective casing 901 and a hollow bottom plate 902 arranged inside the protective casing 901 , an insulating control bridge 903 is hinged on the hollow bottom plate 901 , and the upper surface of the hollow bottom plate 902 is close to the insulating control bridge 903 . A compression spring 904 is provided at the hinge end position, and the compression spring 904 is connected with the lower surface of the insulating control bridge 903 .

The insulating control bridge 903 is provided with a metal sheet 908 in the middle position, the hollow bottom plate 902 is provided with an electromagnet A905 for adsorbing the metal sheet 908, and the insulating control bridge 903 is provided with an electrical contact at the end away from the hinged end. Piece 906, the hollow bottom plate 902 is provided with connecting posts 907 which are respectively connected to the input end of the transformer assembly and the output end of the generator.

After the electromagnet A905 is energized, the electromagnet A905 attracts the metal sheet 904, the insulating control bridge 903 rotates downward, and the energized contact piece 906 is connected to the terminal 907 to realize the electrical connection of the transformer assembly, so After the electromagnet A905 is powered off, the electromagnet A905 does not attract the metal sheet 904, the insulating control bridge 903 rotates upward, and the energized contact piece 906 is disconnected from the terminal 907, that is, the power off of the transformer assembly is realized. .

As shown in FIG. 5 and FIG. 7 , the power supply end of the electromagnet A905 is provided with a temperature control switch 5, and the temperature control switch 5 is connected with an overload monitoring system 6, which is used for real-time monitoring of low-voltage components, transformers The working current, voltage and working temperature of the components and high-voltage components, and control the closing and opening of the temperature control switch 5 according to the temperature of the transformer components.

When the parameters of the operating current, voltage and operating temperature of the low-voltage components, transformer components and high-voltage components are all within the normal thresholds, the overload monitoring system 6 controls the temperature control switch 5 to close, and the electromagnet A905 is energized, the electromagnet A905 adsorbs the insulation control power The metal sheet 908 of the bridge 903, the insulating control bridge 903 rotates around the hinged position and squeezes the compression spring 904 down, and the contact piece 906 contacts with the terminal 907 to form the energization circuit of the input end of the transformer assembly, the normal operation of the transformer assembly, the compression at this time The spring 904 has a resilient force under pressure.

When the parameters of the operating current, voltage or operating temperature of the low-voltage components, transformer components and high-voltage components respectively exceed the normal thresholds, the overload monitoring system 6 controls the temperature control switch 5 to turn off, and the electromagnet A905 is not energized, the electromagnet A905 is no longer adsorbed The metal sheet 908 of the insulating control bridge 903, under the action of the compression spring 904, the insulating control bridge 903 rotates and resets in the reverse direction around the hinged position, the energized contact piece 906 is not in contact with the terminal 907, and the low-voltage component and the transformer component are disconnected The energized circuit between them stops the work of the transformer assembly.

The overload monitoring system 6 further controls the temperature control switch 5 to automatically close or open. When the temperature of the internal components of the substation is reduced from high temperature to less than the set threshold and returns to normal parameters, the overload monitoring system 6 controls the temperature control switch 5 to close. When the temperature of the transformer assembly is greater than the set threshold, the overload monitoring system 6 controls the temperature control switch 5 to automatically turn off again.

As shown in FIG. 6 , since the insulating control bridge 903 will oscillate when the compression spring 904 is reset, the disconnection and contact between the energized contact piece 906 and the terminal 907 are unstable, and there is a potential safety hazard. Therefore, in order to ensure the insulating control bridge 903 For stability during reset, a braking mechanism 4 is further provided at the position of the hollow bottom plate 902 in this embodiment close to the hinged end of the insulating control bridge 903 .

The braking mechanism 4 avoids the oscillation caused by the reset of the insulation control bridge 903 , and the braking mechanism 4 includes vertical support plates 401 arranged on both sides of the insulation control bridge 903 . The control bridge 903 resets the oscillating brake strip 402, and the two sides of the insulating control bridge 903 are provided with inclined cutting grooves 403, and the surface of the braking strip 402 is provided with a diagonal direction opposite to the inclined cutting groove 403. Brake rack 404 .

Therefore, when the insulation control bridge 903 is reset, the height of the insulation control bridge 903 rises, and the cross-section of the contact position between the insulation control bridge 903 and the braking bar 402 is trapezoidal, and the inner side of the braking bar 402 is in contact with the insulation control bridge. The broken section of the bridge 903 is parallel, so when the insulating control bridge 903 is reset to the original position, the braking racks 404 on the inner side of the braking bar 402 just match the inclined cutting grooves 403 on both sides of the insulating control bridge 903. At the same time, the braking effect on the compression spring 904 can be realized, and the oscillation effect of the compression spring 904 can be prevented.

Since the braking rack 404 and the inclined cutting groove 403 are locked with each other, the braking compression spring 904 continues to stretch to ensure that the compression spring 904 returns to the original position. The locking method of the braking rack 404 and the inclined cutting groove 403 is not It affects the downward rotation of the insulation control bridge 903, so it does not hinder the normal adsorption of the electromagnet A905.

Therefore, as the fourth main feature point of the present invention, when the relay is disconnected, in order to avoid the potential safety hazard caused by the oscillation of the electrified contact piece 906 under the action of the spring, a control system is specially arranged on both sides of the insulation control bridge 903. When the insulating control bridge 903 is reset to the original position, it can realize the braking effect on the compression spring 904, prevent the oscillating effect of the compression spring 904, and improve the overall safety performance of the box-type transformer substation.

Although the present invention has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the present invention, which will be obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention fall within the scope of the claimed protection of the present invention.

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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