Novel multifunctional prefabricated substation

Abstract

A novel multifunctional prefabricated substation comprises a prefabricated substation body, a cooling fan, a partition plate, a short message module, a smoke detection circuit, a detection circuit and a temperature control circuit. The multiple sets of partition plates are installed at the rear end, the left end and the right end in the box body respectively to form a high-voltage switch equipment chamber, a low-voltage power distribution equipment chamber and a transformer chamber, and the space among the transformer chamber, the high-voltage power distribution equipment chamber and the low-voltage power distribution equipment chamber serves as a maintenance channel. The detection circuit is matched with a plurality of micro stroke power switches with handles; the plurality of stroke power switches are respectively arranged at the lower ends of the outer sides of the plurality of partition plates; and the smoke detection circuit, the short message module, the detection circuit and the temperature control circuit are arranged in the electric control box and are electrically connected. The whole device is relatively compact, convenience is brought to follow-up maintenance, the probability of electric shock of workers during maintenance is reduced, short messages can be automatically pushed to managers when a fire disaster occurs, and a detection circuit can automatically switch on a cooling fan to work when the temperature in the box body exceeds the standard.

Description

Technical Field

[0001] This utility model relates to the field of substation equipment technology, and in particular to a new type of multifunctional prefabricated substation. Background Technology

[0002] Prefabricated substations (also known as box-type substations) are a type of compact substation that integrates high-voltage switchgear, transformers, and low-voltage distribution equipment into a fully enclosed steel structure box. They have the following advantages: (1) High-voltage switchgear, transformers, and low-voltage distribution equipment are pre-assembled and commissioned in the factory, achieving integrated design and possessing protection functions such as moisture-proof, rust-proof, dust-proof, and fire-proof; and the core components, including high-voltage switchgear, transformers, and low-voltage distribution equipment, are connected via busbars or cables, exhibiting modular combination characteristics. (2) Small size (occupying only 1 / 5 the space of traditional substations), suitable for urban public facilities (such as street lighting distribution), industrial parks, commercial centers, and temporary construction scenarios, offering good flexibility and convenience. (3) Supports outdoor installation and can achieve rapid deployment and maintenance through modular design, exhibiting good environmental adaptability. In summary, prefabricated substations, with their core advantages of standardized and modular design, optimize the flexibility and security of power supply through integrated and intelligent technologies, becoming an important alternative to traditional substations.

[0003] With the development of industrial technology, prefabricated substation technology has also made some progress. For example, the authorized patent in my country, patent number "201620694343.7" and titled "Prefabricated Substation," describes that "a double-layer hollow electromagnetic wave absorbing metal body is snap-fitted and fixedly installed on the inner peripheral wall of the prefabricated substation body. A sliding double-layer hollow electromagnetic wave absorbing metal door, matching the size and position of the substation door, is also installed inside the prefabricated substation body. At least one layer of electromagnetic wave absorbing film is provided inside both the double-layer hollow electromagnetic wave absorbing metal body and the double-layer hollow electromagnetic wave absorbing metal door. Its beneficial effects are: simple construction, convenient installation, and reduced electromagnetic wave interference to the surrounding environment of the substation." As can be seen above, although the aforementioned patent has achieved its inventive purpose to a certain extent, it still has the following technical shortcomings due to structural and functional limitations. Firstly, prefabricated substations used in applications such as highway toll stations cannot exceed the 2.5m width requirement stipulated for highway toll stations. Therefore, existing prefabricated substations install all components from front to back and left to right inside the enclosure, resulting in a complex structure that can cause inconvenience for subsequent maintenance. Secondly, they lack active cooling capabilities, typically relying on manual operation of cooling fans. This method is inconvenient for staff, and the fans remain powered on continuously when the equipment is not overheating, leading to unnecessary energy waste. Thirdly, they lack protective functions. This means that if staff fail to turn off the circuit breakers of high-voltage switchgear, transformers, and low-voltage distribution equipment for various reasons during maintenance, there is a risk of accidental electric shock. Utility Model Content

[0004] To overcome the drawbacks of existing prefabricated substations due to structural limitations, as described in the background section, this utility model provides a new type of multifunctional prefabricated substation that integrates transformers, high-voltage switchgear, and low-voltage distribution equipment, which are respectively installed in transformer rooms, high-voltage switchgear rooms, and low-voltage distribution equipment rooms separated by partitions. This results in a more compact overall design, facilitating subsequent maintenance. Furthermore, when maintenance personnel remove the partitions to maintain the transformers, high-voltage switchgear, and low-voltage distribution equipment, the circuit breaker at the main power input terminal automatically trips, reducing the risk of electric shock. In the event of a fire within the enclosure, it automatically sends text messages to the mobile phones of relevant management personnel. Additionally, it automatically switches on the cooling fan when the temperature inside the enclosure exceeds the standard and automatically switches off when the temperature returns to normal, achieving both effective heat dissipation and energy conservation.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A novel multifunctional prefabricated substation includes a prefabricated substation body, a cooling fan, partitions, and a text messaging module. It also features a smoke detection circuit, a detection circuit, and a temperature control circuit. Multiple sets of partitions are fixedly installed within the substation body's enclosure at the rear and left / right ends. The spaces between the left, right, and rear ends of the enclosure and the three sets of partitions serve as a high-voltage switchgear room, a low-voltage distribution equipment room, and a transformer room. The high-voltage switchgear, low-voltage distribution equipment, and transformer within the substation body are respectively fixedly installed within these rooms. The space between the transformer room, high-voltage distribution equipment room, and low-voltage distribution equipment room within the enclosure serves as a maintenance passage. The distance between the roof and the upper part of the enclosure serves as a ventilation cavity. The roof has at least two ventilation holes, and a cooling fan is fixedly installed on one of the ventilation holes. The detection circuit is equipped with multiple limit power switches, which are respectively fixedly installed on the lower outer side of multiple partitions. The smoke detection circuit, SMS module, detection circuit, and temperature control circuit are installed in the electrical control box. The signal output terminal of the smoke detection circuit and the signal input terminal of the SMS module are electrically connected. The power output terminal of the temperature control circuit and the power input terminal of the cooling fan are electrically connected. The signal output terminal of the detection circuit is electrically connected to the two contacts below the circuit breaker test button at the main power input terminal of the substation.

[0007] Furthermore, the length and width of the enclosure are 2.5m and 2m, respectively, and the length and width of the maintenance passage are 1.5m and 80cm, respectively.

[0008] Furthermore, the handles of the multiple limit power switches respectively contact the lower outer side of the multiple partitions, and the internal contacts of the multiple limit power switches are in an open circuit state. The internal contacts of the limit power switches are normally closed structures.

[0009] Furthermore, a mesh isolation plate is fixedly installed on another vent of the enclosure and on the upper end of the frame of the cooling fan.

[0010] Furthermore, the distance between the multiple partitions and the upper part of the box body.

[0011] Furthermore, the smoke detection circuit includes a smoke sensor, a resistor, and a silicon controlled rectifier (SCR) that are electrically connected. The positive power input terminal of the smoke sensor is connected to the anode of the SCR, the control electrode of the SCR is connected to one end of the resistor, and the other end of the resistor is connected to the signal output terminal of the smoke sensor.

[0012] Furthermore, the negative power input terminal of the SMS module is connected to one of the signal input terminals.

[0013] Furthermore, the temperature control circuit includes a temperature switch, a resistor, a transistor, and a relay that are electrically connected. One end of the temperature switch is connected to the positive power input terminal and the control power input terminal of the relay. The other end of the temperature switch is connected to one end of the resistor. The other end of the resistor is connected to the base of the transistor. The collector of the transistor is connected to the negative power input terminal of the relay.

[0014] Furthermore, the detection circuit includes an electrically connected resistor, a transistor, and a relay, and is connected to multiple limit power switches via wires. The power input terminals of the multiple limit power switches are connected to the positive power input terminal of the relay. The power output terminals of the multiple limit power switches are connected to one end of the resistor, the other end of the resistor is connected to the base of the transistor, and the collector of the transistor is connected to the negative power input terminal of the relay.

[0015] Compared with existing technologies, the advantages of this utility model are as follows: Based on a prefabricated substation body, this new model installs high-voltage switchgear, transformers, and low-voltage distribution equipment separately in high-voltage switchgear room, transformer room, and low-voltage distribution equipment room separated by partitions. The overall equipment is more compact, which also facilitates subsequent maintenance. When maintenance personnel remove the partitions and the internal contacts of the corresponding micro-switch close during maintenance of the transformer, high-voltage switchgear, and low-voltage distribution equipment, the two contacts under the circuit breaker test button at the main power input terminal of the equipment will close, thereby automatically tripping the circuit breaker and de-energizing the transformer, high-voltage switchgear, and low-voltage distribution equipment, reducing the chance of electric shock for maintenance personnel. In the event of a fire inside the enclosure, it can automatically send SMS messages to the mobile phones of relevant management personnel. When the temperature inside the enclosure exceeds the standard, the detection circuit can automatically activate the cooling fan and automatically shut off the cooling fan when the enclosure temperature returns to normal, achieving both effective heat dissipation and energy saving. In summary, this new model has good application prospects. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a top view schematic diagram of the overall planar structure of this utility model.

[0018] Figure 2 This is a three-dimensional structural diagram of the entire and some parts of this utility model.

[0019] Figure 3 This is a side view schematic diagram of the structure of this utility model.

[0020] Figure 4 This is a partially enlarged structural schematic diagram of this utility model.

[0021] Figure 5 This is the circuit diagram of this utility model. Detailed Implementation

[0022] Figure 1 , 2 As shown in Figures 3, 4, and 5, a novel multifunctional prefabricated substation includes a prefabricated substation body 1, a cooling fan M, partitions 2, a power module A1, a battery G1, and a text messaging module A3. It also includes a smoke detection circuit 3, a detection circuit 4, and a temperature control circuit 5. Three sets of partitions 2 are bolted to the rear and left / right ends of the enclosure 100 of the substation body 1. The spaces between the left, right, and rear ends of the enclosure and the three sets of partitions serve as a high-voltage switchgear room 101, a low-voltage distribution equipment room 102, and a transformer room 103. The high-voltage switchgear 104, low-voltage distribution equipment 105, and transformer 106 of the substation body are respectively fixedly installed within the high-voltage switchgear room 101, the low-voltage distribution equipment room 102, and the transformer room 103. The space between the equipment room, the low-voltage power distribution equipment room, and the transformer room serves as a maintenance passage 107; the distance between the roof 108 of the enclosure and the upper part of the enclosure serves as a ventilation chamber 109, with the left and right ends of the ventilation chamber 109 being open and continuous; the middle of the upper part of the roof of the enclosure and the right side each have a ventilation hole 110, and the cooling fan M is fixedly installed on the right ventilation hole 110; the detection circuit is equipped with three micro-motion power switches S1, S2, and S3, which are fixedly installed on the lower middle of the outer side of the three partitions 2; the power module A1, the battery G1, the smoke detection circuit 3, the SMS module A3, the detection circuit 4, and the temperature control circuit 5 are installed on the circuit board inside the electrical control box 6, which is sealed inside the upper middle part of the enclosure 100.

[0023] Figure 1 , 2As shown in Figures 3, 4, and 5, the enclosure 100 has a length and width of 2.5m and 2m respectively, and the maintenance passage is 80cm wide and 1.5m long (to facilitate personnel entering the passage to remove or install partitions). The handles of the three limit power switches S1, S2, and S3 respectively contact the lower outer ends of the three partitions. The internal contacts of the three limit power switches S1, S2, and S3 are in the open circuit state, while the internal contacts of the limit power switches S1, S2, and S3 are normally closed. Mesh isolation plates 111 are fixedly installed on the vent in the middle of the enclosure and on the upper end of the cooling fan frame (to facilitate ventilation and reduce the chance of foreign objects entering the enclosure). A sealing plate (not shown in the figure; specifically, it isolates the two vents to prevent hot air from the cooling fan from entering the middle vent) is fixedly installed between the middle vent and the right vent. The three partitions 2 are spaced a certain distance from the upper end of the enclosure 100 (30cm apart; mainly for ventilation and heat dissipation). The smoke detection circuit includes a smoke sensor A2, a resistor R1, and a silicon controlled rectifier (SCR) VS connected via circuit board wiring. Pin 1 of the positive power input terminal of smoke sensor A2 is connected to the anode of SCR VS. The control electrode of SCR VS is connected to one end of resistor R1, and the other end of resistor R1 is connected to pin 3 of the signal output terminal of smoke sensor A2. Pin 2 of the negative power input terminal of SMS module A3 is connected to one of the signal input terminals, pin 3. The temperature control circuit includes a temperature switch W1, a resistor R2, a transistor Q1, and a relay J1 connected via circuit board wiring. One end of temperature switch W1 is connected to the positive power input terminal and the control power input terminal of relay J1. The other end of temperature switch W1 is connected to one end of resistor R2, and the other end of resistor R2 is connected to the base of transistor Q1. The collector of transistor Q1 is connected to the negative power input terminal of relay J1. The detection circuit includes a resistor R3, a transistor Q3, and a relay J2 connected via circuit board wiring. It is also connected to three limit switches S1, S2, and S3 via wires. The power input terminals of the three limit switches S1, S2, and S3 are connected to the positive power input terminal of the relay J2. The power output terminals of the three limit switches S1, S2, and S3 are connected to one end of resistor R3, and the other end of resistor R3 is connected to the base of transistor Q2. The collector of transistor Q2 is connected to the negative power input terminal of the relay J2. The temperature switch W1 and the probe of the smoke sensor A2 are located outside two openings at the bottom of the control box.

[0024] Figure 1 , 2As shown in Figures 3, 4, and 5, the power input terminals 1 and 2 of power module A1, the two control power input terminals of relay J1, and the 220V AC power supply (one phase and one neutral wire of a three-phase four-wire power supply) in the low-voltage distribution equipment room are connected by wires. The power output terminals 3 and 4 of power module A1 are connected to the two terminals of battery G1, the power input terminal 2 of SMS module A3 (connected to the power input terminal 2 of SMS module A3), the power input terminals 1 and 2 of smoke sensor A2, the power input terminal of detection circuit relay J2, and the three terminals of relay J2 are also connected. The emitter of transistor Q2, the power input terminal of the temperature control circuit, the positive power input terminal of relay J1, and the emitter of transistor Q1 are connected by wires. The signal output terminal of the smoke detection circuit, the cathode of the thyristor VS, and pin 1 of the positive power input terminal of the SMS module A3 are connected by wires. The two normally open contacts of the power output terminal of the temperature control circuit, the two power input terminals of the cooling fan M, and the control contact and normally open contact of the relay J2, the signal output terminal of the detection circuit, and the two contacts under the circuit breaker DL experimental button SY at the main power input terminal of the substation are connected by wires.

[0025] Figure 1 , 2As shown in Figures 3, 4, and 5, this new invention is based on a prefabricated substation body 1. The prefabricated substation body is an existing mature electromechanical equipment. This application does not protect the technical solution of the prefabricated substation body in any way, nor does it make unnecessary elaborations. Specifically, in this invention, the high-voltage switchgear 104, transformer 106, and low-voltage distribution equipment 105 are respectively installed in the high-voltage switchgear room 101, transformer room 103, and low-voltage distribution equipment room 102, which are separated by partitions. The overall equipment is relatively more compact and also brings convenience to subsequent maintenance. After the AC 220V power supply enters the power input terminal of the power module A1, the power module A1 outputs a stable DC 12V power supply from pins 3 and 4, which enters the two poles of the battery G1 and the power input terminals of the SMS module A3, smoke detection circuit, detection circuit, and temperature control circuit. The above circuits are powered on and work, and at the same time, the battery G1 is charged, ensuring that the relevant circuits will still be powered on and work when the power is off. When the temperature inside the enclosure 100 exceeds 40℃, the internal contacts of the temperature switch W1 open, so the relay J1 will not be energized and will not operate. Conversely, when the temperature inside the enclosure 100 exceeds 40℃, the internal contacts of the temperature switch W1 close, energizing the relay J1 and closing its control power input terminal and normally open contact. This energizes the cooling fan M, allowing external air to enter the enclosure through several openings on the isolation plate 111. After absorbing heat from the electrical components inside the enclosure, the air is drawn out by the cooling fan M and discharged into the atmosphere through the ventilation chamber 109. Through these mechanisms, this invention automatically activates the cooling fan when the temperature inside the enclosure exceeds the limit and automatically shuts off the cooling fan when the enclosure temperature returns to normal, achieving both effective heat dissipation and energy saving.

[0026] Figure 1 , 2As shown in Figures 3, 4, and 5, when there is no fire or smoke generated by the electrical components inside the prefabricated substation body 1, pin 3 of the smoke sensor A2 does not output a high level, so the SMS module A3 will not be powered on to send SMS messages. When a fire or smoke is generated by the electrical components inside the prefabricated substation body 1, pin 3 of the smoke sensor A2 outputs a high level. The high level is stepped down and current limited by resistor R1 to trigger the control electrode of the thyristor VS. Consequently, the thyristor VS is triggered to conduct, and the SMS module A1 is powered on. Since pins 2 and 3 of the SMS module A1 are connected, a low-level signal is input to pin 3 of the SMS module A1 at this moment. The SMS module A1 will send out the first SMS message stored inside. After receiving the SMS message, the mobile phones of relevant personnel at the remote end can immediately learn that a fire has occurred on site and rush to the scene in time to carry out targeted firefighting and other measures. When maintenance is not required on the transformer, high-voltage switchgear, or low-voltage distribution equipment, the three partitions remain in place. The handles of the three limit switches S1, S2, and S3 are in contact with the lower outer edges of the three partitions, and their internal contacts are open. Therefore, relay J2 will not be energized, and the two lower contacts of the circuit breaker DL test button SY at the main power input terminal of the substation will not close, preventing circuit breaker DL from tripping and ensuring normal equipment operation. However, when maintenance is required on the transformer, high-voltage switchgear, or low-voltage distribution equipment, removing one or two or three partitions removes the handles of limit switches S1 or S2 and S3 from contacting the lower outer edges of one or two or three partitions. The internal contacts of one limit switch S1, the second limit switch S2, and the third limit switch S3 are closed. This allows 12V power to flow through one or two or three limit switches to one end of resistor R3. In other words, removing any partition will cause the circuit breaker to trip. After the 12V power supply enters one end of resistor R3 through one or two or three limit switches, transistor Q3 will conduct, and the collector outputs a low level that enters the negative power input terminal of relay J2. Relay J2 is energized and its control contact and normally open contact close. Since the control contact, normally open contact and the two contacts under the circuit breaker DL test button SY at the main power input terminal of the substation are connected by wires, the circuit breaker DL will trip at this moment. Consequently, the circuit breaker will automatically open, and the transformer, high-voltage switchgear and low-voltage distribution equipment will all lose power, reducing the chance of electric shock for maintenance personnel. Figure 5In the diagram, power module A1 is an AC 220V to DC 12V switching power supply module; relays J1 and J2 are DC 12V; the SCR VS is a plastic-encapsulated unidirectional SCR, model MCR100-1; transistors Q1 and Q2 are 9013 (NPN); the cooling fan M has a power of 200W; resistors R1, R2, and R3 have resistances of 4.7K, 47K, and 100K respectively (for voltage reduction and current limiting); battery G1 is a 12V / 10Ah lithium battery; and SMS module A3 is a YED model... The A4106 six-channel SMS alarm (brand: Biyin Technology) has two power input terminals, one control terminal (connected to the negative power input terminal), and six signal input terminals. When a low-level signal is input to each signal input terminal, it will send six internally stored SMS messages. The smoke detection module A2 is a finished wired smoke alarm of model YG01A-2, which has two power input terminals, one normally open contact output terminal, and one normally closed power output terminal (floating in this embodiment). When smoke caused by a fire is detected, the normally open contact terminal will output power. The temperature switch W1 is an adjustable normally open contact type temperature control switch. All of the above electronic components are existing mature technologies, so this application will not elaborate on their working principles.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0028] Furthermore, it should be understood that although this specification describes the embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel multifunctional prefabricated substation, comprising a prefabricated substation body, a cooling fan, partitions, and a text messaging module, characterized in that, It also features smoke detection circuits, detection circuits, and temperature control circuits; multiple sets of partitions are fixedly installed inside the substation body's enclosure at the rear and left and right ends. The spaces between the left, right, and rear ends of the enclosure and the three sets of partitions serve as the high-voltage switchgear room, low-voltage distribution equipment room, and transformer room. The high-voltage switchgear, low-voltage distribution equipment, and transformer of the substation body are respectively fixedly installed in the high-voltage switchgear room, low-voltage distribution equipment room, and transformer room; the space between the transformer room, high-voltage distribution equipment room, and low-voltage distribution equipment room inside the enclosure serves as a maintenance passage; the distance between the roof of the enclosure and the upper part of the enclosure is... As a ventilation chamber, the roof of the enclosure has at least two ventilation holes, and a cooling fan is fixedly installed on one of the ventilation holes. The detection circuit is equipped with multiple limit power switches, which are respectively fixedly installed on the lower outer side of multiple partitions. The smoke detection circuit, SMS module, detection circuit, and temperature control circuit are installed in the electrical control box. The signal output terminal of the smoke detection circuit and the signal input terminal of the SMS module are electrically connected. The power output terminal of the temperature control circuit and the power input terminal of the cooling fan are electrically connected. The signal output terminal of the detection circuit is electrically connected to the two contacts below the circuit breaker test button at the main power input terminal of the substation.

2. The novel multifunctional prefabricated substation according to claim 1, characterized in that, The enclosure is 2.5m long and 2m wide, and the maintenance passage is 1.5m long and 80cm wide.

3. A novel multifunctional prefabricated substation according to claim 1, characterized in that, The handles of multiple limit power switches contact the lower outer side of multiple partitions respectively. The internal contacts of the multiple limit power switches are in an open circuit state, and the internal contacts of the limit power switches are normally closed.

4. A novel multifunctional prefabricated substation according to claim 1, characterized in that, Mesh isolation plates are fixedly installed on another vent of the enclosure and on the upper part of the cooling fan frame.

5. A novel multifunctional prefabricated substation according to claim 1, characterized in that, Multiple partitions and the distance between the upper part of the box.

6. A novel multifunctional prefabricated substation according to claim 1, characterized in that, The smoke detection circuit includes a smoke sensor, a resistor, and a silicon controlled rectifier (SCR) that are electrically connected. The positive power input terminal of the smoke sensor is connected to the anode of the SCR, the control electrode of the SCR is connected to one end of the resistor, and the other end of the resistor is connected to the signal output terminal of the smoke sensor.

7. A novel multifunctional prefabricated substation according to claim 1, characterized in that, The negative power input terminal of the SMS module is connected to one of the signal input terminals.

8. A novel multifunctional prefabricated substation according to claim 1, characterized in that, The temperature control circuit includes a temperature switch, a resistor, a transistor, and a relay that are electrically connected. One end of the temperature switch is connected to the positive power input terminal and the control power input terminal of the relay. The other end of the temperature switch is connected to one end of the resistor. The other end of the resistor is connected to the base of the transistor. The collector of the transistor is connected to the negative power input terminal of the relay.

9. A novel multifunctional prefabricated substation according to claim 1, characterized in that, The detection circuit includes an electrically connected resistor, transistor, and relay, and is connected to multiple limit power switches via wires. The power input terminals of the multiple limit power switches are connected to the positive power input terminal of the relay. The power output terminals of the multiple limit power switches are connected to one end of the resistor, the other end of the resistor is connected to the base of the transistor, and the collector of the transistor is connected to the negative power input terminal of the relay.

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