Box-type substation with a safe fireproof structure

Abstract

The application relates to the technical field of transformer substations, and discloses a box-type transformer substation with a safe fireproof structure, which comprises a fire extinguishing tank, the top of the fire extinguishing tank is fixedly connected with an output pipe, the inner wall of the output pipe is fixedly connected with a diaphragm for sealing fire extinguishing medium, the top of the box body is fixedly connected with a Venturi tube in a symmetrical mode, the top of the Venturi tube is fixedly connected with a connecting pipe, the outer wall of the connecting pipe is fixedly connected with a shunt pipe in a symmetrical mode, the bottom of the connecting block is fixedly connected with a thorn needle, the outer wall of the output pipe is fixedly connected with a conveying pipe, one end of each of multiple conveying pipes is fixedly connected with a straight pipe, and the outer wall of each straight pipe is uniformly fixedly connected with a nozzle. High-temperature smoke generated by fire forms a driving airflow through the Venturi tube, the thorn needle is driven to pierce the diaphragm to release fire extinguishing medium, and the fire in the initial stage is sprayed and extinguished; the fire extinguishing device is driven by the gas pressure generated by the fire, does not need to rely on electric control, and solves the defects of fire extinguishing device failure and poor reliability after power failure and control system damage.

Description

Technical Field

[0001] This invention relates to the field of substation technology, specifically to a box-type substation with a safe and fireproof structure. Background Technology

[0002] A prefabricated substation is an outdoor compact substation that integrates high-voltage power distribution, transformers, and low-voltage compensation equipment. It is particularly suitable for urban power grid construction and renovation and is a new type of substation that has emerged after civil engineering substations. The equipment integrates oil-immersed transformers, switchgear, power capacitors and other heat-generating core components. During long-term operation under load, it is prone to faults such as winding overload, cable insulation aging, terminal block short circuits, and small animals gnawing on cables, which can lead to internal fires and pose significant safety hazards. Therefore, a prefabricated substation with a safe and fireproof structure is required.

[0003] Existing prefabricated substations typically have ventilation holes on both sides of the enclosure, with louvers installed inside to dissipate the heat generated by the electrical equipment inside the enclosure to the external environment, ensuring that the equipment operates normally within the allowable temperature range. Temperature sensors monitor fire signals inside the enclosure, and when a fire signal is detected, the fire extinguishing device is activated electronically to extinguish the fire.

[0004] The inventors of this application discovered in their research that the core defect of the aforementioned prior art is that although some existing prefabricated substations are equipped with fire extinguishing devices, they mostly rely on the electrical control system for driving. When a fire causes a power outage or damage to the control system, the fire extinguishing device will not be able to start normally, resulting in serious reliability issues. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a safe and fire-resistant prefabricated substation, which solves the problem that although some existing prefabricated substations are equipped with fire extinguishing devices, they mostly rely on the electrical control system for operation. When a fire causes a power outage or damage to the control system, the fire extinguishing devices will fail to start normally, resulting in serious reliability issues.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fireproof box-type substation, comprising a base, a box body fixedly connected to the top of the base, fire extinguishing tanks symmetrically fixedly connected to both sides of the box body, an output pipe fixedly connected to the top of the fire extinguishing tank, a diaphragm for sealing the extinguishing medium fixedly connected to the inner wall of the output pipe, a Venturi tube symmetrically fixedly connected to the top of the box body, a connecting pipe fixedly connected to the top of the Venturi tube, a diverter pipe symmetrically fixedly connected to the outer wall of the connecting pipe, a support cavity fixedly connected to one end of multiple diverter pipes, a connecting block slidably connected to the inner wall of the support cavity, a spike fixedly connected to the bottom of the connecting block, a spring fixedly connected to the side opposite to the bottom of the connecting block and the support cavity, and interception components for sealing the box body in case of fire installed on both sides of the box body. It also includes a one-way valve, which is installed on the outer wall of the connecting pipe. The outer wall of the output pipe is fixedly connected to a conveying pipe. One end of the multiple conveying pipes is fixedly connected to a straight pipe. The outer wall of the straight pipe is fixedly connected to the inner wall of the housing. Nozzles are evenly fixedly connected to the outer wall of the straight pipe. The nozzles are directed toward the installation area of ​​the transformer and electrical equipment inside the housing. The bottom of the needle slides through the support cavity and the output pipe. The outer wall of the support cavity is fixedly connected to one side of the housing.

[0007] By adopting the above technical solution, the high-temperature and high-pressure hot smoke generated by the fire is collected by the Venturi tube and introduced into the connecting pipe. After being diverted by the one-way valve, one path of hot and high-pressure airflow enters the support chamber, pushing the connecting block to compress the spring. This causes the connecting block to drive the needle downward to pierce the diaphragm in the output pipe. The extinguishing medium stored inside the fire extinguishing tank is released instantly under its own pressure. After being transported through the output pipe, delivery pipe, and straight pipe, the extinguishing medium is sprayed into the transformer and electrical equipment installation area inside the box by multiple evenly distributed nozzles. This achieves the function of quickly suppressing the fire source and extinguishing the initial fire in the early stage of the fire. It solves the problem that although some existing box-type substations are equipped with fire extinguishing devices, they mostly rely on the electrical control system for driving. When the fire causes a power outage or the control system is damaged, the fire extinguishing device will not be able to start normally, resulting in serious reliability issues.

[0008] Preferably, the interception assembly includes a connecting cavity, the outer walls of the two connecting cavities are respectively fixedly connected to both sides of the housing, the inner walls of the connecting cavities are symmetrically slidably connected to sealing blocks, one side of the sealing block is fixedly connected to a connecting rod, the outer wall of the connecting rod is slidably connected to one side of the connecting cavity, one side of the connecting rod is fixedly connected to a support plate, one side of the support plate is fixedly connected to a baffle, and two springs are fixedly connected to opposite sides of the sealing block and the connecting cavity. One end of the connecting tube is fixedly connected to the middle of the connecting cavity, and the two sealing blocks are symmetrically arranged on the outer walls of the connecting tube.

[0009] Preferably, a straight plate is provided between the two baffles, a partition is fixedly connected to the bottom of the straight plate, and a gravity block is fixedly connected to one side of the partition. The gravity block is used to drive the partition to move downward by its own weight when the baffle is lost. Sliding frames are fixedly connected to both sides of the box, and the outer wall of the partition is slidably connected to the sliding frame.

[0010] Preferably, heat dissipation holes are provided on both sides of the housing, and louvers are evenly arranged inside the heat dissipation holes.

[0011] Preferably, the sliding frame is disposed on the outer wall of the heat dissipation hole, and the partition is used to fall downward under the action of gravity and cover and tightly seal the heat dissipation hole.

[0012] Preferably, both inner walls of the box are fixedly connected with barrier compartments, and the barrier compartments are located on one side of the heat dissipation holes.

[0013] Preferably, an inclined plate is fixedly connected inside the barrier chamber, a rotating shaft is uniformly rotatably connected inside the inclined plate, a rotating roller is fixedly connected to the outer wall of the rotating shaft, and a filter screen is fixedly connected to the top of the barrier chamber.

[0014] Preferably, a temperature sensor is installed on the inner wall of the enclosure, and the temperature sensor is used to monitor the temperature inside the enclosure in real time.

[0015] Preferably, a controller is installed on one side of the housing. The controller is electrically connected to the temperature sensor and the one-way valve. The controller is used to control the one-way valve to open when the received temperature signal exceeds a preset safety threshold.

[0016] This invention provides a fire-resistant prefabricated substation. It offers the following advantages: 1. This invention collects high-temperature, high-pressure hot smoke generated by a fire through a venturi tube and introduces it into a connecting pipe. After being diverted by a one-way valve, one stream of hot, high-pressure airflow enters the support chamber, pushing the connecting block to compress the spring. This causes the connecting block to drive the needle downwards to pierce the diaphragm inside the output pipe. The extinguishing medium stored inside the fire extinguishing tank is released instantaneously under its own pressure. After being transported through the output pipe, delivery pipe, and straight pipe, the extinguishing medium is sprayed into the transformer and electrical equipment installation area inside the tank by multiple evenly distributed nozzles, achieving the function of quickly suppressing the fire source and extinguishing the initial fire in its early stages.

[0017] 2. In this invention, hot and high-pressure airflow is introduced into the middle of the connecting cavity through a connecting pipe. Under the action of air pressure, the sealing blocks are pushed to slide backwards to both sides. The sealing blocks drive the connecting rod and the support plate to move outwards, causing the baffle fixed to the inner side of the support plate to open to both sides. This releases the support of the baffle to the bottom of the straight plate, allowing the partition and gravity block to slide vertically downwards along the sliding frame under their own weight until the partition covers the outer wall of the heat dissipation hole and seals it tightly. This achieves the functions of cutting off the external oxygen supply, creating an oxygen-deficient and flame-suppressing environment inside the box, and preventing the fire from continuing to spread.

[0018] 3. This invention, through a barrier compartment fixedly connected to the inner wall of the enclosure and communicating with the heat dissipation holes, and an inclined plate set inside the barrier compartment, in conjunction with multiple rotating shafts rotatably connected to the inclined plate and rotating rollers fixedly connected to the outer wall of the rotating shafts, prevents small animals from penetrating the heat dissipation holes and stepping on the rotating rollers. Due to friction, the rotating rollers are driven to rotate freely, preventing them from being stably gripped and causing them to slide to the bottom of the barrier compartment. This achieves the function of preventing small animals from penetrating the inner wall of the enclosure and biting the cable insulation layer. At the same time, through a filter screen fixedly connected to the top of the barrier compartment, mosquitoes and dust particles are intercepted and filtered to prevent insects from gathering and causing electric shock or poor contact. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 3 This is a schematic cross-sectional view of the box structure of the present invention; Figure 4 This is a schematic diagram of the open state structure of the interception component of the present invention; Figure 5 This is a schematic diagram of the interception component in the off state of the present invention; Figure 6 This is a partial structural diagram of the fire extinguishing canister of the present invention; Figure 7 for Figure 6 Enlarged structural diagram at point A in the middle; Figure 8 This is a cross-sectional view of the interception component of the present invention; Figure 9 This is a partial structural diagram of the barrier chamber of the present invention; Figure 10 This is a schematic diagram of the internal structure of the barrier chamber of the present invention.

[0020] The components are as follows: 1. Base; 101. Box body; 2. Fire extinguisher; 201. Output pipe; 202. Diaphragm; 203. Venturi tube; 204. Connecting pipe; 205. Diverter pipe; 206. Support cavity; 207. Connecting block; 208. Needle; 209. Spring 1; 2009. One-way valve; 210. Delivery pipe; 211. Straight pipe; 212. Nozzle; 3. Connecting cavity; 301. Sealing block; 302. Connecting rod; 303. Support plate; 304. Baffle; 305. Spring 2; 4. Straight plate; 401. Partition; 402. Gravity block; 403. Sliding frame; 5. Heat dissipation hole; 501. Louver; 6. Barrier chamber; 601. Inclined plate; 602. Rotating shaft; 603. Rotating roller; 604. Filter screen; 7. Temperature sensor; 701. Controller. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see the appendix Figure 1 -Appendix Figure 9 This invention provides a fireproof box-type substation, including a base 1, a box 101 fixedly connected to the top of the base 1, fire extinguishing tanks 2 symmetrically fixedly connected to both sides of the box 101, an output pipe 201 fixedly connected to the top of the fire extinguishing tanks 2, a diaphragm 202 for sealing the fire extinguishing medium fixedly connected to the inner wall of the output pipe 201, a venturi tube 203 symmetrically fixedly connected to the top of the box 101, a connecting pipe 204 fixedly connected to the top of the venturi tube 203, a diversion pipe 205 symmetrically fixedly connected to the outer wall of the connecting pipe 204, a support cavity 206 fixedly connected to one end of multiple diversion pipes 205, a connecting block 207 slidably connected to the inner wall of the support cavity 206, a needle 208 fixedly connected to the bottom of the connecting block 207, and a spring 209 fixedly connected to the opposite side of the bottom of the connecting block 207 and the support cavity 206. Interception components for sealing the box 101 in case of fire are installed on both sides of the box 101.

[0023] It also includes a one-way valve 2009, which is installed on the outer wall of the connecting pipe 204. The outer wall of the output pipe 201 is fixedly connected to a conveying pipe 210. One end of the multiple conveying pipes 210 is fixedly connected to a straight pipe 211. The outer wall of the straight pipe 211 is fixedly connected to the inner wall of the housing 101. The outer wall of the straight pipe 211 is uniformly fixedly connected to nozzles 212. The spray nozzles 212 face the installation area of ​​the transformer and electrical equipment inside the housing 101. The bottom of the needle 208 slides through the support cavity 206 and the output pipe 201. The outer wall of the support cavity 206 is fixedly connected to one side of the housing 101.

[0024] Specifically, when a fire breaks out inside enclosure 101 due to transformer overload, electrical equipment short circuit, or aging wiring, the internal temperature of enclosure 101 rises rapidly, generating a large amount of high-temperature, high-pressure hot smoke. Two symmetrically arranged Venturi tubes 203 at the top of enclosure 101 have their inlets connected to the interior of enclosure 101 and their outlets connected to connecting pipe 204. In the early stages of the fire, the internal pressure of enclosure 101 increases with the rising temperature. Driven by the pressure difference, the high-temperature hot smoke rapidly enters the Venturi tubes 203, and after being accelerated and guided by the Venturi tubes 203, it enters the connecting pipe 204. At this time… With the one-way valve 2009 in the open state, the hot, high-pressure airflow in the connecting pipe 204 flows along the connecting pipe 204 and splits into two paths after passing through the one-way valve 2009: one path enters the interception component along the connecting pipe 204, driving the heat dissipation hole 5 to seal; the other path is diverted through the diversion pipe 205 into the support cavity 206. The support cavity 206 is a closed cavity. After the hot, high-pressure airflow continuously fills the support cavity 206, the internal air pressure rises sharply. The air pressure pushes the connecting block 207 to slide downward against the elastic resistance of the spring 209. The connecting block 207 drives the needle 208 to move downward synchronously. The bottom of needle 208 is slidably connected to the bottom of support cavity 206 and the top of output pipe 201, and penetrates downward into the output pipe 201. Needle 208 continues to descend until its tip pierces diaphragm 202. After diaphragm 202 is pierced, the extinguishing medium stored inside the fire extinguishing tank 2, including but not limited to ultrafine dry powder, will be released instantly under its own pressure. It will quickly enter the delivery pipe 210 through output pipe 201, and then be transported through delivery pipe 210 to straight pipe 211 fixedly connected to the inner wall of box 101. Finally, it is discharged by multiple spray nozzles evenly distributed on the outer wall of straight pipe 211. The nozzle 212 sprays fire extinguishing medium into the transformer and electrical equipment installation area inside the enclosure 101, achieving the function of quickly suppressing the fire source and extinguishing the initial fire. This solves the problem that although some existing box-type substations are equipped with fire extinguishing devices, they mostly rely on the electrical control system for driving. When a fire causes a power outage or the control system is damaged, the fire extinguishing device will not be able to start normally, resulting in serious reliability issues. During this process, after the needle 208 punctures the diaphragm 202, the connecting block 207 and the needle 208 remain in the puncture position due to the continuous air pressure in the support cavity 206, ensuring that the fire extinguishing medium is completely released. After the fire is extinguished and the temperature drops, the punctured needle 208, diaphragm 202, and fire extinguishing canister 2 are all disposable parts. Therefore, after the fire ends, the punctured fire extinguishing canister 2, together with the output pipe 201 and diaphragm 202, must be replaced with a new canister assembly pre-filled with extinguishing medium. The support cavity 206, the punctured needle 208, and the spring 209 must also be replaced simultaneously. If the metal structural parts such as the support cavity 206, the diversion pipe 205, the connecting pipe 204, the straight pipe 211, and the nozzle 212 are not directly burned by the flame or deformed by high temperature, they can be reused after cleaning and functional inspection.

[0025] Please see the appendix Figure 2 -Appendix Figure 6 Appendix Figure 8 The interception assembly includes a connecting cavity 3. The outer walls of the two connecting cavities 3 are respectively fixedly connected to the two sides of the housing 101. The inner walls of the connecting cavities 3 are symmetrically slidably connected to sealing blocks 301. A connecting rod 302 is fixedly connected to one side of the sealing block 301. The outer wall of the connecting rod 302 is slidably connected to one side of the connecting cavity 3. A support plate 303 is fixedly connected to one side of the connecting rod 302. A baffle 304 is fixedly connected to one side of the support plate 303. Springs 305 are fixedly connected to the opposite sides of the sealing block 301 and the connecting cavity 3. One end of the connecting pipe 204 is fixedly connected to the middle of the connecting cavity 3. The two sealing blocks 301 are symmetrically arranged on the outer walls of the connecting pipe 204. A straight plate 4 is provided between the two baffles 304. A partition 401 is fixedly connected to the bottom of the straight plate 4. A gravity block 402 is fixedly connected to one side of the partition 401. The gravity block 402 is used to drive the partition 401 downward by its own weight when the support of the baffle 304 is lost. A sliding frame 403 is fixedly connected to both sides of the box 101. The outer wall of the partition 401 is slidably connected to the sliding frame 403. Both sides of the housing 101 are provided with heat dissipation holes 5, and the interior of the heat dissipation holes 5 is evenly provided with louvers 501. The sliding frame 403 is set on the outer wall of the heat dissipation hole 5, and the partition 401 is used to fall downward under the action of gravity and cover and seal the heat dissipation hole 5.

[0026] Specifically, when the enclosure 101 is running normally, the heat dissipation holes 5 and louvers 501 on both sides are used to dissipate the heat generated by the electrical equipment inside the enclosure 101 to the external environment, ensuring that the equipment works normally within the allowable temperature range. At this time, the partition 401 is kept in the open position above the heat dissipation holes 5 under the support of the baffle 304, the gravity block 402 is suspended and supported, and the air inside and outside the enclosure 101 can circulate and dissipate heat normally. When a fire occurs, the hot, high-pressure airflow passes through the Venturi tube 203, connecting pipe 204, and one-way valve 2009. One stream of airflow continues along the connecting pipe 204 to the middle of the connecting cavity 3. Under the action of air pressure, it simultaneously pushes the two sealing blocks 301 to both sides, causing the two sealing blocks 301 to slide and separate back-to-back along the inner wall of the connecting cavity 3. The sealing blocks 301 drive the connecting rod 302 to overcome the elastic resistance of the spring 305 and slide outwards from the connecting cavity 3. The connecting rod 302 drives the support plate 303 to move outwards synchronously. The support plate 303 drives the baffle 304 to open to both sides. A straight plate 4 is provided between the two baffles 304. A partition 401 is fixedly connected to the bottom of the straight plate 4. When the two baffles 304 open to both sides synchronously, the baffle 301... The supporting function of the bottom of the straight plate 4 is removed. The partition plate 401 is a fire-resistant and heat-insulating material. The partition plate 401 and the gravity block 402 slide vertically downward along the sliding frame 403 under their own weight until the partition plate 401 covers the outer wall of the heat dissipation hole 5, sealing the heat dissipation hole 5 tightly. After the heat dissipation hole 5 is completely blocked by the partition plate 401, external oxygen can no longer enter the interior of the box 101 through the heat dissipation hole 5. The combustion intensity of the combustibles inside the box 101 is significantly reduced in the oxygen-deficient environment, and the fire cannot continue to expand. At the same time, it works with the extinguishing medium released by the fire extinguishing canister 2 to achieve the dual effects of rapid fire extinguishing and continuous fire suppression. When the fire is extinguished and the internal temperature of the box 101 returns to normal, the structure of the interception component needs to be replaced.

[0027] Please see the appendix Figure 2 Appendix Figure 3 Appendix Figure 10 The inner walls on both sides of the housing 101 are fixedly connected with barrier compartments 6, which are located on one side of the heat dissipation holes 5. An inclined plate 601 is fixedly connected inside the barrier chamber 6. A rotating shaft 602 is uniformly rotatably connected inside the inclined plate 601. A rotating roller 603 is fixedly connected to the outer wall of the rotating shaft 602. A filter screen 604 is fixedly connected to the top of the barrier chamber 6.

[0028] Specifically, under normal operating conditions, the ventilation holes 5 of the enclosure 101 are always open to ensure ventilation and heat dissipation inside the enclosure 101. However, the opening of the ventilation holes 5 also provides a potential passage for small animals such as mice, snakes, and lizards to enter the enclosure 101. To prevent small animals from entering the enclosure 101 through the ventilation holes 5, a barrier chamber 6 is fixedly connected to the inner wall of the enclosure 101 on the side corresponding to the ventilation holes 5. The barrier chamber 6 is a box-shaped cavity structure connected to the ventilation holes 5. When a small animal attempts to crawl in through the ventilation holes 5, it will first enter the barrier chamber 6 and step on the rotating roller 603. Since the rotating roller 603 is rotatably connected to the inclined plate 601 through the rotating shaft 602, the friction generated when the small animal steps on it... The rotating roller 603 will rotate freely, making it impossible for small animals to find a stable gripping foothold on the surface of the rotating roller 603. After losing balance, they will slide off the rotating roller 603 and fall to the bottom of the barrier compartment 6, preventing them from going deeper into the box 101. This avoids the risk of small animals entering the box 101 and gnawing on the cable insulation or electrical equipment leads, causing short circuits and fires. In addition, a filter screen 604 is fixedly connected to the top of the barrier compartment 6. The filter screen 604 is used to filter the air entering through the heat dissipation hole 5, intercepting small insects such as mosquitoes and moths, as well as dust particles, preventing insects from accumulating inside the box 101 and causing electric shock or poor electrical contact, while maintaining the cleanliness of the inside of the box 101.

[0029] Please see the appendix Figure 1 -Appendix Figure 3 A temperature sensor 7 is installed on the inner wall of the enclosure 101. The temperature sensor 7 is used to monitor the temperature inside the enclosure 101 in real time. A controller 701 is installed on one side of the housing 101. The controller 701 is electrically connected to the temperature sensor 7 and the one-way valve 2009. The controller 701 is used to control the one-way valve 2009 to open when the received temperature signal exceeds a preset safety threshold.

[0030] Specifically, temperature sensor 7 is used to collect and monitor the ambient temperature inside the enclosure 101 in real time. When a fire is caused inside the enclosure 101 due to an electrical fault, the temperature signal collected by temperature sensor 7 in real time continues to rise. Temperature sensor 7 is electrically connected to controller 701 and transmits the collected real-time temperature signal to controller 701. Controller 701 adopts a programmable logic control module with a preset temperature safety threshold, which is electrically connected to one-way valve 2009. In normal standby mode, the diaphragm 202 inside the fire extinguisher 2 is completely sealed, the partition 401 is supported by the baffle 304 in the open position above the heat dissipation hole 5, the one-way valve 2009 is in the closed state, and the temperature sensor 7 continuously monitors the internal temperature of the cabinet 101. When the controller 701 determines that the received temperature signal value exceeds the preset safety threshold, it determines that a fire has occurred inside the enclosure 101. At this time, the controller 701 outputs an opening signal to control the one-way valve 2009 to open, so that the airflow channel in the connecting pipe 204 is open, and the hot high-pressure airflow can flow along the connecting pipe 204 to the diversion pipe 205 and the connecting cavity 3, thereby triggering the aforementioned fire extinguishing action of the needle 208 piercing the diaphragm 202 and the sealing action of the heat dissipation hole 5. Through the electronic monitoring of the temperature sensor 7 and the controller 701, the automatic identification and accurate triggering of the fire are realized, improving the overall response accuracy and reliability of the system. During the fire, even if the temperature sensor 7 is damaged, the one-way valve 2009 remains open.

[0031] Work process: In normal standby mode, the diaphragm 202 inside the fire extinguisher 2 is completely sealed, the baffle 401 is supported by the baffle 304 in the open position above the heat dissipation hole 5, the one-way valve 2009 is closed, and the temperature sensor 7 continuously monitors the internal temperature of the box 101. When a fire occurs inside the enclosure 101 due to transformer overload, electrical equipment short circuit or aging wiring, the internal temperature rises sharply, generating a large amount of high temperature and high pressure hot flue gas. Driven by the pressure difference, the hot flue gas is accelerated and guided by the Venturi tube 203 and then enters the connecting pipe 204. The controller 701 receives the temperature signal fed back by the temperature sensor 7. When the value is determined to exceed the preset safety threshold, an opening signal is output to control the one-way valve 2009 to open. The hot and high-pressure airflow in the connecting pipe 204 flows along the connecting pipe 204 and is divided into two paths after passing through the one-way valve 2009. One path is diverted through the diversion pipe 205 into the support cavity 206. The support cavity 206 is a closed cavity. After the hot and high-pressure airflow is continuously filled, the air pressure rises sharply, pushing the connecting block 207 to slide downward against the elastic resistance of the spring 209. The tip of the piercing needle 208 pierces the diaphragm 202. The extinguishing medium stored inside the fire extinguishing tank 2 is released instantly under its own pressure. It enters the delivery pipe 210 through the output pipe 201 and is then delivered to the straight pipe 211. Finally, it is sprayed out by the nozzle 212. After the piercing needle 208 pierces the diaphragm 202, the connecting block 207 and the piercing needle 208 remain in the pierced position because the air pressure in the support cavity 206 continues to exist, ensuring that the extinguishing medium is completely released. Another path is transported along the connecting pipe 204 to the middle of the connecting cavity 3. Under the action of air pressure, the two sealing blocks 301 are pushed to the sides and slide away in opposite directions. The sealing blocks 301 drive the connecting rod 302 to overcome the elastic resistance of the spring 305 and extend outward. The connecting rod 302 drives the support plate 303 and the baffle 304 to open to the sides, and the supporting effect on the bottom of the straight plate 4 is released. The partition plate 401 and the gravity block 402 slide vertically downward along the sliding frame 403 under their own gravity until the partition plate 401 covers the outer wall of the heat dissipation hole 5 and seals it tightly. The barrier chamber 6 works continuously under normal operation. When small animals crawl into the heat dissipation hole 5, they step on the rotating roller 603. The friction generated by the small animals stepping on the roller 603 drives it to rotate freely, making it unable to hold on and slipping to the bottom of the barrier chamber 6, thus preventing it from entering the box 101. The filter screen 604 simultaneously intercepts mosquitoes and dust particles. After the fire has ended and the temperature has dropped, the fire extinguisher 2, diaphragm 202, needle 208, spring 209, and the entire set of interception moving parts need to be replaced. The support chamber 206, diversion pipe 205, pipeline, and nozzle 212 can be cleaned, inspected, and reused if there is no high temperature deformation. The barrier chamber 6, temperature sensor 7, and controller 701 are damaged by smoke and high temperature and need to be replaced as needed.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fire-resistant prefabricated substation, comprising a base (1), characterized in that: A housing (101) is fixedly connected to the top of the base (1). Fire extinguishing canisters (2) are symmetrically fixedly connected to both sides of the housing (101). An output pipe (201) is fixedly connected to the top of the fire extinguishing canisters (2). A diaphragm (202) for sealing the extinguishing medium is fixedly connected to the inner wall of the output pipe (201). A venturi tube (203) is symmetrically fixedly connected to the top of the housing (101). A connecting pipe (204) is fixedly connected to the top of the venturi tube (203). A diversion pipe (205) is symmetrically fixedly connected to the outer wall. One end of the multiple diversion pipes (205) is fixedly connected to a support cavity (206). A connecting block (207) is slidably connected to the inner wall of the support cavity (206). A needle (208) is fixedly connected to the bottom of the connecting block (207). A spring (209) is fixedly connected to the opposite side of the bottom of the connecting block (207) and the support cavity (206). An interception assembly for sealing the box (101) in case of fire is installed on both sides of the box (101).

2. The fire-resistant prefabricated substation according to claim 1, characterized in that: It also includes a one-way valve (2009), which is installed on the outer wall of the connecting pipe (204). The outer wall of the output pipe (201) is fixedly connected to a conveying pipe (210). One end of the multiple conveying pipes (210) is fixedly connected to a straight pipe (211). The outer wall of the straight pipe (211) is fixedly connected to the inner wall of the housing (101). The outer wall of the straight pipe (211) is uniformly fixedly connected to a nozzle (212). The nozzle (212) sprays towards the installation area of ​​the transformer and electrical equipment inside the housing (101). The bottom of the needle (208) slides through the support cavity (206) and the output pipe (201). The outer wall of the support cavity (206) is fixedly connected to one side of the housing (101).

3. A fire-resistant prefabricated substation according to claim 1, characterized in that: The interception assembly includes a connecting cavity (3). The outer walls of the two connecting cavities (3) are respectively fixedly connected to the two sides of the housing (101). The inner walls of the connecting cavities (3) are symmetrically slidably connected with sealing blocks (301). A connecting rod (302) is fixedly connected to one side of the sealing block (301). The outer wall of the connecting rod (302) is slidably connected to one side of the connecting cavity (3). A support plate (303) is fixedly connected to one side of the connecting rod (302). A baffle (304) is fixedly connected to one side of the support plate (303). A spring (305) is fixedly connected to the opposite side of the sealing block (301) and the connecting cavity (3). One end of the connecting tube (204) is fixedly connected to the middle of the connecting cavity (3). The two sealing blocks (301) are symmetrically arranged on the outer walls of the connecting tube (204).

4. A fire-resistant prefabricated substation according to claim 3, characterized in that: A straight plate (4) is provided between the two baffles (304). A partition (401) is fixedly connected to the bottom of the straight plate (4). A gravity block (402) is fixedly connected to one side of the partition (401). The gravity block (402) is used to drive the partition (401) to move downward by its own weight when the baffle (304) is lost. A sliding frame (403) is fixedly connected to both sides of the box (101). The outer wall of the partition (401) is slidably connected to the sliding frame (403).

5. A fire-resistant prefabricated substation according to claim 4, characterized in that: The box (101) has heat dissipation holes (5) on both sides, and the heat dissipation holes (5) are uniformly arranged with louvers (501) inside.

6. A fire-resistant prefabricated substation according to claim 5, characterized in that: The sliding frame (403) is disposed on the outer wall of the heat dissipation hole (5), and the partition (401) is used to fall downward under the action of gravity and cover and seal the heat dissipation hole (5).

7. A fire-resistant prefabricated substation according to claim 1, characterized in that: The inner walls on both sides of the box (101) are fixedly connected with barrier chambers (6), and the barrier chambers (6) are located on one side of the heat dissipation holes (5).

8. A fire-resistant prefabricated substation according to claim 7, characterized in that: An inclined plate (601) is fixedly connected inside the barrier chamber (6). A rotating shaft (602) is uniformly rotatably connected inside the inclined plate (601). A rotating roller (603) is fixedly connected to the outer wall of the rotating shaft (602). A filter screen (604) is fixedly connected to the top of the barrier chamber (6).

9. A fire-resistant prefabricated substation according to claim 1, characterized in that: A temperature sensor (7) is installed on the inner wall of the enclosure (101), and the temperature sensor (7) is used to monitor the temperature inside the enclosure (101) in real time.

10. A fire-resistant prefabricated substation according to claim 9, characterized in that: A controller (701) is installed on one side of the housing (101). The controller (701) is electrically connected to the temperature sensor (7) and the one-way valve (2009). The controller (701) is used to control the one-way valve (2009) to open when the received temperature signal exceeds a preset safety threshold.

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