Negative pressure fire insulation accident oil collecting device with oil blocking function

Abstract

The negative pressure fire insulation accident oil collecting device with the oil blocking function is used for being arranged on the side of a movable transformer and comprises a modular oil tank, and an oil inlet is formed in the top of the modular oil tank; the oil baffle plate is mounted at the oil inlet, and the plate surface of the oil baffle plate is arranged towards the mobile transformer; the fire insulation interlayer is fixed in the modularized oil tank and divides an inner cavity of the modularized oil tank into an upper-layer fire insulation cavity and a lower-layer oil storage cavity; the negative pressure mechanism communicates with the oil storage cavity and is used for forming negative pressure in the oil storage cavity and diluting oxygen in the oil tank, the requirement for rapid deployment of the mobile transformer substation is met through the design of the modular oil tank, and the problems that a traditional civil engineering oil pool cannot move and is long in period are solved. The oil baffle plate effectively blocks and guides splashed high-temperature oil liquid, so that the problem that fire behavior is expanded due to the fact that the oil liquid spreads everywhere during an accident is solved; the fire insulation interlayer allows oil to pass through but can isolate open fire outside, and the risk of secondary combustion or explosion caused by the fact that flames flow into the oil storage cavity along with oil is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer substations, and more particularly to a negative pressure fire barrier accident oil collecting device with an oil blocking function. BACKGROUND

[0002] Mobile substations, as key power emergency support equipment, are widely used in load transfer during substation maintenance, temporary capacity increase during power supply peak, and emergency power supply scenes such as rescue and disaster relief due to their flexible deployment and rapid operation. Currently, it is a standard practice to equip the transformer in a fixed substation with a reinforced concrete structure accident oil tank. However, this traditional accident oil tank has inherent characteristics such as long construction period, occupation of station land, and inability to move, which cannot meet the operational requirements of temporary deployment, rapid operation, and flexible transfer of mobile substations.

[0003] Therefore, in actual application, once the transformer fails, the high-temperature transformer oil inside will be rapidly sprayed under pressure and is extremely easy to burn in the presence of an open flame, causing serious consequences: Ineffective collection of accident oil: Without reliable collection devices, the sprayed oil will quickly spread to the surrounding area, not only polluting the environment, but also forming a large burning area, leading to rapid expansion of the accident.

[0004] Lack of fire barrier and flame retardant measures: The sprayed oil with flames will directly flow into a closed or open container, causing the flames to enter, resulting in the collected oil in the container being ignited, and even possibly causing an explosion, which cannot effectively control the fire.

[0005] Insufficient oil collection rate: The transformer oil has a high viscosity, and if only relying on gravity natural flow, the convergence speed is slow, and the dangerous oil cannot be quickly directed to a safe area during the critical period in the early stage of the accident.

[0006] In the prior art, simple oil collecting devices have also been attempted for mobile substations, but these devices have single functions and often only have simple storage functions, and cannot effectively prevent oil spraying, achieve fire-oil separation, and other technical problems.

[0007] Therefore, how to provide a mobile accident oil collecting device that can be quickly deployed and simultaneously achieve effective oil blocking, efficient fire barrier, and negative pressure acceleration collection functions is a problem that needs to be solved by those skilled in the art. SUMMARY

[0008] Therefore, the present application provides a negative pressure fire barrier accident oil collecting device with an oil blocking function, which aims to solve the above technical problems.

[0009] To achieve the above purpose, the present application adopts the following technical solutions: A negative pressure fire-resistant emergency oil collection device with oil-blocking function, for placement on the side of a mobile transformer, includes: A modular fuel tank, wherein an oil inlet is provided on the top of the modular fuel tank; An oil baffle is installed at the oil inlet, with its surface facing the direction of the mobile transformer. A fireproof interlayer is fixed inside the modular oil tank and divides the inner cavity of the modular oil tank into an upper fireproof cavity and a lower oil storage cavity. A negative pressure mechanism is connected to the oil storage chamber and is used to create a negative pressure inside the oil storage chamber and dilute the oxygen in the oil storage chamber to prevent high-temperature oil from entering the oil storage chamber and reigniting.

[0010] Through the above technical solution, this invention discloses a negative pressure fire-resistant emergency oil collection device with oil-blocking function. The modular oil tank design directly meets the needs of rapid deployment of mobile substations, effectively solving the problems of traditional civil engineering oil tanks being immobile and having long construction cycles. The oil baffle plate facing the transformer effectively blocks and guides the splashed high-temperature oil, reducing the problem of oil spreading everywhere and causing the fire to expand during an accident. The fire-resistant interlayer constitutes a key fire-oil separation barrier, which allows oil to pass through but isolates open flames, reducing the risk of flames flowing into the oil storage chamber and causing secondary combustion or explosion. The negative pressure mechanism connected to the oil storage chamber solves the problems of oil collection rate and safety inerting by creating negative pressure in the chamber. On the one hand, it increases the inflow rate of viscous transformer oil, ensuring rapid control of the hazard source in the early stage of an accident. On the other hand, it removes air from the oil storage chamber, effectively reducing the risk of reignition of the collected oil.

[0011] Preferably, in the aforementioned negative pressure fire-resistant emergency oil collection device with oil-blocking function, the oil baffle is arranged at an angle, and a support rod is fixed between the surface of the baffle away from the mobile transformer and the top surface of the modular oil tank. The angled arrangement of the oil baffle improves its flow guiding effect, enabling more efficient guidance of splashed oil to the oil inlet. The support rod fixation ensures the structural rigidity and stability of the oil baffle when subjected to oil impact, preventing deformation or collapse and guaranteeing the reliability of its core function in an emergency.

[0012] Preferably, in the aforementioned negative pressure fire-resistant emergency oil collection device with oil-blocking function, the fire-resistant interlayer includes an upper grate, a fire-resistant particle filling layer, and a lower grate arranged sequentially from top to bottom. The upper and lower grates support and fix the fire-resistant particles, while their mesh structure allows oil to pass through smoothly. The middle fire-resistant particle filling layer is the core of achieving the fire-resistant function; its large specific surface area and inert properties can effectively suffocate and cool penetrating flames.

[0013] Preferably, in the aforementioned negative pressure fireproof emergency oil collection device with oil-blocking function, the fireproof particle filling layer is composed of fireproof ceramic fragments. Ceramic materials possess extremely high fire resistance, chemical stability, and mechanical strength, ensuring that the fireproof layer does not fail or participate in reactions at high temperatures, and is not prone to pulverization after long-term use; thus improving the fireproof and flame-retardant rate.

[0014] Preferably, in the above-mentioned negative pressure fire-resistant emergency oil collection device with oil-blocking function, there are multiple modular oil tanks arranged side by side. By combining multiple oil tanks side by side, the total oil storage capacity can be flexibly and conveniently expanded, easily meeting the needs of transformers of different capacities, solving the problem of limited capacity of a single oil tank, and enhancing the versatility and adaptability of the device.

[0015] Preferably, in the above-mentioned negative pressure fire-resistant emergency oil collection device with oil-blocking function, the number of negative pressure mechanisms is the same as the number of modular oil tanks. Each negative pressure mechanism includes a vacuum pump and a first connecting pipe. The vacuum pump is installed on the outside of the modular oil tank, and one end of the first connecting pipe is connected to the vacuum pump, while the other end communicates with the inside of the oil storage chamber. Each oil tank is equipped with an independent vacuum pump, which has the advantages of simple control logic, no interference between the negative pressure systems of each oil tank, and high reliability. Even if one vacuum pump fails, it will not affect the normal collection function of other oil tanks.

[0016] Preferably, in the above-mentioned negative pressure fire-resistant emergency oil collection device with oil-blocking function, the first connecting pipe is located at the top of the oil storage chamber. Positioning the negative pressure connecting pipe at the top of the oil storage chamber ensures that the vacuum pump always draws air from the oil surface, rather than liquid oil, fundamentally avoiding the risk of oil being sucked into the vacuum pump and causing pump damage, thus guaranteeing the long-term stable operation of the negative pressure system.

[0017] Preferably, in the aforementioned negative pressure fire-resistant emergency oil collection device with oil-blocking function, each modular oil tank is equipped with an adapter, and adjacent adapters are connected by a second connecting pipe. Multiple independent modular oil tanks are connected in series as a whole in the gas path via the adapters and connecting pipes; this allows them to balance each other's pressure.

[0018] Preferably, the negative pressure fire-resistant emergency oil collection device with oil-blocking function further includes a drainage mechanism. The drainage mechanism includes a level sensor, a solenoid valve, and a controller. The level sensor is installed inside the oil storage chamber, the solenoid valve is installed on the side wall of the modular oil tank and communicates with the inside of the oil storage chamber, and the controller is electrically connected to the level sensor and the solenoid valve. This adds an automatic drainage function, solving the problem of rainwater accumulation. Through the cooperation of the level sensor and the solenoid valve, automatic drainage can be performed when the oil level in the storage chamber reaches a certain height, preventing rainwater accumulation from occupying valuable oil storage capacity and ensuring that the device has sufficient capacity to collect transformer oil in the event of an accident.

[0019] Preferably, in the aforementioned negative pressure fire-resistant emergency oil collection device with oil-blocking function, the vacuum pump is electrically connected to the controller. This achieves safety logic linkage control. The controller can automatically start the vacuum pump based on the signal from the liquid level sensor (e.g., high liquid level and determination of oil). This avoids delays or errors caused by human operation, ensuring that the negative pressure system can be put into operation promptly in the event of an accident, accelerating oil collection and simultaneously removing oxygen, thus achieving automation and intelligence in safety protection.

[0020] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a negative pressure fire-resistant oil collection device with oil-blocking function, which has the following beneficial effects: 1. The modular design of this invention breaks the traditional fixed emergency oil tank model, realizes synchronous transportation and flexible deployment with mobile substation equipment, effectively solves the problem of lack of accident protection caused by long construction period and inability to move, and ensures that the speed and safety of emergency power supply are taken into account.

[0021] 2. The oil baffle of this invention effectively suppresses the initial splashing of oil and guides it to the oil collection port. The oil-fire mixture then enters the critical fireproof interlayer, which utilizes the suffocation and cooling effect of fireproof particles to achieve precise separation of oil and fire, blocking open flames. At the same time, the negative pressure system directly connected to the oil storage chamber is activated, which not only creates a negative pressure inert environment inside the oil chamber, reducing the possibility of reignition of the collected oil, but also significantly increases the collection speed of viscous transformer oil by increasing the pressure difference, achieving synergistic effect of fire extinguishing and disaster control.

[0022] 3. This invention, through the arrangement of multiple modular oil tanks, can flexibly adapt to transformers of different capacity levels, and has strong scalability; the integration of liquid level sensing and automatic control unit can further realize the intelligent linkage between automatic rainwater discharge and vacuum system, which reduces manual intervention while ensuring oil storage space, and greatly improves the long-term reliability and comprehensive operation and maintenance efficiency of the device. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 The attached figure is a front view of the negative pressure fireproof emergency oil collection device with oil-blocking function provided by the present invention arranged on both sides of a mobile transformer. Figure 2 The attached figure is an isometric view of the negative pressure fireproof emergency oil collection device with oil-blocking function provided by the present invention; Figure 3 The attached figure is a structural schematic diagram of the negative pressure fireproof emergency oil collection device with oil-blocking function provided by the present invention from another angle; Figure 4 The attached figure is a top view of the negative pressure fireproof emergency oil collection device with oil-blocking function provided by the present invention; Figure 5 The attached figure is a schematic diagram of the interconnected structure of multiple negative pressure fire-resistant emergency oil collection devices with oil-blocking function provided by the present invention; Figure 6 The attached figure is a top view of the negative pressure fireproof emergency oil collection device with oil-blocking function provided by the present invention arranged on both sides of a mobile transformer.

[0025] Wherein: 1-Mobile transformer; 2-Modular oil tank; 21-Oil inlet; 22-Fireproof chamber; 23-Oil storage chamber; 24-Adapter; 25-Second connecting pipe; 3-Oil baffle; 4-Fireproof interlayer; 41-Upper grate; 42-Fireproof particle filling layer; 43-Lower grate; 5-Negative pressure mechanism; 51-Vacuum pump; 52-First connecting pipe; 6-Support rod; 7-Solenoid valve. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below 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.

[0027] See appendix Figure 1 and attached Figure 2 As shown, this embodiment of the invention discloses a negative pressure fire-resistant oil collection device with oil-blocking function, which is arranged on the side of a mobile transformer 1, and includes: Modular fuel tank 2, with an oil inlet 21 on the top; Oil baffle 3 is installed at the oil inlet 21, and its surface is arranged facing the mobile transformer 1. Fireproof interlayer 4 is fixed inside the modular oil tank 2 and divides the inner cavity of the modular oil tank 2 into an upper fireproof cavity 22 and a lower oil storage cavity 23. The negative pressure mechanism 5 is connected to the oil storage chamber 23 and is used to create a negative pressure inside the oil storage chamber 23 and dilute the oxygen in the oil storage chamber 23.

[0028] In some specific embodiments, such as Figure 2 As shown, the oil baffle 3 is arranged at an angle, and a support rod 6 is fixed between the plate surface away from the mobile transformer 1 and the top surface of the modular oil tank 2.

[0029] In other embodiments, such as Figure 2 As shown, the fireproof interlayer 4 includes an upper grate 41, a fireproof particle filling layer 42, and a lower grate 43 arranged sequentially from top to bottom.

[0030] In a specific embodiment, the fire-retardant particle filling layer 42 is composed of fire-retardant ceramic fragments.

[0031] In a specific example, such as Figure 5 As shown, there are multiple modular fuel tanks 2, which are arranged side by side.

[0032] As attached Figure 1 and attached Figure 6 As shown, multiple modular oil tanks 2 are distributed on both sides of the mobile transformer 1. The specific number of modular oil tanks 2 is determined according to actual needs.

[0033] In some examples, such as Figure 5 As shown, the number of negative pressure mechanisms 5 is the same as the number of modular oil tanks 2. Each negative pressure mechanism 5 includes a vacuum pump 51 and a first connecting pipe 52. The vacuum pump 51 is installed on the outside of the modular oil tank 2. One end of the first connecting pipe 52 is connected to the vacuum pump 51, and the other end is connected to the inside of the oil storage chamber 23.

[0034] More specifically, the first connecting pipe 52 is located at the top of the oil storage chamber 23.

[0035] In some specific examples, each modular tank 2 is equipped with an adapter 24, and adjacent adapters 24 are connected by a second connecting pipe 25.

[0036] More specifically, it also includes a drainage mechanism, which includes a level sensor, a solenoid valve 7, and a controller. The level sensor is installed inside the oil storage chamber 23, the solenoid valve 7 is installed on the side wall of the modular oil tank 2 and communicates with the inside of the oil storage chamber 23, and the controller is electrically connected to the level sensor and the solenoid valve 7.

[0037] In some other embodiments, the vacuum pump 51 is electrically connected to the controller.

[0038] The embodiments of the present invention are as follows: When mobile transformer 1 malfunctions, causing high-temperature transformer oil to splash, this device operates according to the following procedure to achieve safe and rapid collection of the accidental oil and control of the fire: Oil blocking and flow guidance: The splashed transformer oil first impacts the oil baffle 3, which is positioned facing the transformer. The inclined oil baffle 3 can effectively withstand the impact and guide the oil downward, causing it to collect and flow towards the oil inlet 21; the support rod 6 ensures the stability of the oil baffle 3 under the impact of the oil.

[0039] Fire-oil separation: The oil-liquid mixture carrying the flame enters the fireproof chamber 22 through the oil inlet 21 and first falls onto the upper grate 41 of the fireproof interlayer 4. The oil-fire mixture then permeates through the fireproof particle filling layer 42 (such as fireproof ceramic fragments). This filling layer has a huge specific surface area and heat absorption effect, which can quickly cool the oil and suffocate the flame, achieving the key separation of "oil passing through but not fire". The separated open flame is confined within the fireproof chamber 22 or extinguishes itself, while the cooled liquid oil continues to pass through the lower grate 43 under the action of gravity and drips into the oil storage chamber 23 below.

[0040] Negative pressure acceleration and reignition prevention: Vacuum pump 51 is automatically activated in the event of an accident or via the controller. Vacuum pump 51 continuously extracts air from the oil reservoir 23 through the first connecting pipe 52 (whose port is located at the top of the oil reservoir 23). This operation produces two core effects: Accelerated collection: A pressure difference is formed inside and outside the oil storage chamber 23. This negative pressure generates a downward "suction force" on the oil passing through the fireproof interlayer 4, which significantly improves the flow and collection speed of viscous transformer oil and achieves rapid oil collection.

[0041] Inertized environment: The air (oxygen) in the oil storage chamber 23 is extracted, creating an oxygen-deficient inertized environment inside. Even if a few sparks accidentally enter, the transformer oil collected in the oil storage chamber 23 cannot be ignited due to the lack of oxidizer, fundamentally eliminating the risk of secondary combustion or explosion.

[0042] Module Expansion and Intelligent Control (Implementation Examples for Multi-Tank and Intelligent Systems): When a larger capacity is required, multiple modular oil tanks 2 are interconnected through a second connecting pipe 25 and an adapter 24, forming a unified oil storage system. The negative pressure mechanism 5 can be configured with one pump per tank, or it can be connected in series for centralized control.

[0043] The level sensor of the drainage mechanism monitors the liquid level in the oil storage chamber 23 in real time. When the liquid level rise is detected and the controller determines that it is rainwater, the solenoid valve 7 is opened to drain the water; when the controller determines that it is transformer oil or an accident has occurred, the solenoid valve 7 is closed and the vacuum pump 51 is started in conjunction with it to achieve fully automatic intelligent operation.

[0044] Through the above collaborative workflow, this invention effectively solves the problem of the lack of a dedicated accident oil tank in mobile substations, and provides a comprehensive safety solution that integrates active blocking, efficient fire isolation, rapid collection, and intrinsic safety.

[0045] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A negative pressure fire-resistant emergency oil collection device with oil-blocking function, used for placement on the side of a mobile transformer (1), characterized in that, include: Modular oil tank (2), the top of which is provided with an oil inlet (21); Oil baffle (3), the oil baffle (3) is installed at the oil inlet (21) and its plate surface is arranged facing the mobile transformer (1); Fireproof interlayer (4) is fixed inside the modular oil tank (2) and divides the inner cavity of the modular oil tank (2) into an upper fireproof cavity (22) and a lower oil storage cavity (23). The negative pressure mechanism (5) is connected to the oil storage chamber (23) and is used to create a negative pressure inside the oil storage chamber (23) to dilute the oxygen in the oil storage chamber (23).

2. The negative pressure fire-resistant emergency oil collection device with oil-blocking function according to claim 1, characterized in that, The oil baffle (3) is arranged at an angle, and a support rod (6) is fixed between the plate surface away from the mobile transformer (1) and the top surface of the modular oil tank (2).

3. The negative pressure fire-resistant emergency oil collection device with oil-blocking function according to claim 1, characterized in that, The fireproof interlayer (4) includes an upper grate (41), a fireproof particle filling layer (42), and a lower grate (43) arranged from top to bottom.

4. The negative pressure fire-resistant emergency oil collection device with oil-blocking function according to claim 3, characterized in that, The fire-retardant particle filling layer (42) is composed of fire-retardant ceramic fragments.

5. A negative pressure fire-resistant emergency oil collection device with oil-blocking function according to claim 1, characterized in that, The number of modular oil tanks (2) is multiple, and the multiple modular oil tanks (2) are arranged side by side.

6. A negative pressure fire-resistant emergency oil collection device with oil-blocking function according to claim 5, characterized in that, The number of negative pressure mechanisms (5) is the same as the number of modular oil tanks (2). Each negative pressure mechanism (5) includes a vacuum pump (51) and a first connecting pipe (52). The vacuum pump (51) is installed on the outside of the modular oil tank (2). One end of the first connecting pipe (52) is connected to the vacuum pump (51), and the other end is connected to the inside of the oil storage chamber (23).

7. A negative pressure fire-resistant emergency oil collection device with oil-blocking function according to claim 6, characterized in that, The first connecting pipe (52) is located at the top of the oil storage chamber (23).

8. A negative pressure fire-resistant emergency oil collection device with oil-blocking function according to claim 5, characterized in that, Each of the modular oil tanks (2) is equipped with an adapter (24), and two adjacent adapters (24) are connected by a second connecting pipe (25).

9. A negative pressure fire-resistant emergency oil collection device with oil-blocking function according to claim 6, characterized in that, It also includes a drainage mechanism, which includes a level sensor, a solenoid valve (7) and a controller. The level sensor is installed in the oil storage chamber (23), the solenoid valve (7) is installed on the side wall of the modular oil tank (2) and communicates with the inside of the oil storage chamber (23), and the controller is electrically connected to the level sensor and the solenoid valve (7).

10. A negative pressure fire-resistant emergency oil collection device with oil-blocking function according to claim 9, characterized in that, The vacuum pump (51) is electrically connected to the controller.

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