A primary and secondary fusion ring network box pressure relief assembly and ring network box

Abstract

The application discloses a primary-secondary fusion ring network box pressure relief assembly and a ring network box, and particularly relates to the technical field of ring network boxes, which comprises a side plate, a pressure relief part and a flow guide part, the pressure relief part comprises a pressure relief plate and a limiting assembly arranged on the side plate, the limiting assembly can limit the pressure relief plate, and the pressure relief part further comprises a pressure relief hole arranged on the side plate; the flow guide part comprises a cooling box and a flow guide piece arranged on the side plate, the cooling box is internally provided with a cooling medium, and the flow guide piece can guide the cooling medium sprayed from the cooling box, the cooling medium in the cooling box and the gas in the box body are simultaneously discharged through the pressure relief hole, so that the gas in the box body is in contact with and mixed with the cooling medium at the pressure relief hole during discharge, and the gas is cooled, thereby preventing the problems that, in the existing pressure relief mode, the pressure relief plate is broken by the airflow pressure in the ring network box, the gas is discharged through the pressure relief hole, the pressure relief speed is slow, and a large amount of high-temperature gas flow which is not completely combusted carries out secondary combustion or even deflagration.

Description

Technical Field

[0001] This invention relates to the field of ring main units, and more specifically, to a pressure relief assembly for a primary and secondary integrated ring main unit and a ring main unit. Background Technology

[0002] The integrated primary and secondary ring main unit is a new type of power distribution network equipment that deeply integrates traditional 10kV ring main switch cabinets with electronic sensors and intelligent power distribution terminals. It replaces external electromagnetic transformers by embedding low-power voltage and current sensors and power extraction modules inside the primary switch body, and unifies analog and digital signals into the intelligent control unit to realize functions such as remote measurement, remote signaling, remote control, fault detection, and local feeder automation.

[0003] However, when a short-circuit arc fault occurs inside the ring main unit, the arc energy causes the surrounding gas to heat up and expand rapidly, generating a huge pressure wave and high temperature. If the energy is not effectively released, the unit may explode, and the fragments and high-temperature gas will cause serious injury to operators and surrounding equipment. Existing pressure relief devices for ring main units typically consist of a metal pressure relief cover, explosion-proof bolts or spring hinges that can break under a preset pressure, high-temperature resistant sealing gaskets, and directional exhaust metal guide channels. This pressure relief method relies on the airflow pressure inside the ring main unit to break through the pressure relief plate and be discharged through the pressure relief port. It cannot quickly remove the gas generated inside the ring main unit, resulting in a slow pressure relief speed. Furthermore, when the pressure relief plate opens, a large amount of unburned high-temperature gas is rapidly ejected. Upon encountering fresh air outside the pressure relief port, there is a high probability of secondary combustion or even deflagration. Therefore, this invention proposes a primary and secondary integrated ring main unit pressure relief component and ring main unit to solve the above problems. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present invention provide a primary and secondary integrated ring network box pressure relief component and a ring network box to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pressure relief assembly for a primary and secondary integrated ring network box, comprising: a side plate, a pressure relief section, and a flow guiding section. The pressure relief section includes a pressure relief plate and a limiting component disposed on the side plate. The limiting component can limit the pressure relief plate. The pressure relief section also includes a pressure relief hole opened on the side plate. The flow guiding section includes a cooling box and a flow guiding component disposed on the side plate. The cooling box contains a cooling medium. When the ring network box is depressurized, the cooling box can spray out the medium. The flow guiding component can guide the cooling medium sprayed out by the cooling box, cool the gas at the pressure relief hole, and create a negative pressure at the pressure relief hole.

[0006] Preferably, the flow guide is annular and concentrically arranged with the pressure relief hole, the flow guide has a first through hole inside, and the cooling box has a second through hole inside, with the first through hole and the second through hole connected.

[0007] Preferably, the limiting component includes a mounting member installed on the side plate, a limiting plate slidably connected inside the mounting member, a first elastic member fixedly connected inside the mounting member, one end of the first elastic member being fixedly connected to the mounting member, and the other end of the first elastic member being fixedly connected to the limiting plate.

[0008] Preferably, an elastic gas storage part is fixedly connected to one end of the mounting component away from the first elastic element, one end of the elastic gas storage part is in contact with the limiting plate, and a third through hole is opened inside the elastic gas storage part.

[0009] Preferably, a sealing element is slidably connected inside the cooling box, the sealing element can seal the second through hole, and a support plate is fixedly connected to one end of the sealing element.

[0010] Preferably, the mounting component has a sliding rod internally connected to it, one end of which extends into the cooling box and is fixedly connected to the support plate, and the end of the sliding rod away from the support plate contacts the limiting plate.

[0011] Preferably, a first connector is fixedly connected to the end of the pressure relief plate away from the limiting plate, and a rotating shaft is rotatably connected inside the first connector. A second connector is fixedly connected to the side plate, and the second connector is rotatably connected to the rotating shaft. A torsion spring for driving the rotating shaft to rotate is provided inside the second connector.

[0012] Preferably, the flow guide is hollow, the first through hole is opened at the end of the flow guide near the pressure relief hole, and the end of the flow guide away from the pressure relief plate is arc-shaped.

[0013] Preferably, the end of the flow guide away from the pressure relief plate has a flow guide groove for the internal airflow to pass through.

[0014] A primary and secondary fusion ring network box includes a box body, the box body is provided with multiple detection and gas storage sections, the multiple detection and gas storage sections are provided with a fourth through hole, the fourth through hole is connected to a third through hole, and the side plate is fixedly connected to one end of the box body.

[0015] The technical effects and advantages of this invention are as follows: This invention utilizes the simultaneous discharge of the cooling medium and the gas inside the cooling box through the pressure relief hole. This allows the gas inside the box to come into contact with and mix with the cooling medium at the pressure relief hole during discharge, resulting in cooling. When the gas inside the guide component is ejected from the guide groove, it is located outside the pressure relief hole, creating a low-pressure zone at the outlet of the pressure relief hole. This causes the gas at the pressure relief hole to flow outward together, and more effectively confines the high-temperature gas within the jet core area, allowing it to fully mix and cool with the cooling medium. This prevents the slow pressure relief speed and secondary combustion or even deflagration problems associated with traditional pressure relief methods that rely on the airflow pressure inside the ring network box to break through the pressure relief plate and discharge through the pressure relief hole. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention.

[0018] Figure 3 This is a schematic diagram of the pressure relief plate structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the overall structure of the pressure relief component of the present invention.

[0020] Figure 5 This is a cross-sectional schematic diagram of the pressure relief component of the present invention.

[0021] Figure 6 This is a cross-sectional schematic diagram of the limiting component of the present invention.

[0022] Figure 7 This is a cross-sectional schematic diagram of the flow guide of the present invention.

[0023] The attached figures are labeled as follows: 1. Side plate; 2. Pressure relief section; 21. Pressure relief plate; 22. Limiting assembly; 221. Mounting component; 222. Limiting plate; 223. First elastic element; 224. Elastic gas storage section; 23. Pressure relief hole; 3. Flow guide section; 31. Cooling box; 311. Second through hole; 312. Sealing element; 313. Support plate; 314. Slide rod; 32. Flow guide component; 321. First through hole; 4. Box body; 41. Detection gas storage section. Detailed Implementation

[0024] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1

[0026] In practical use, it was found that when the ring main unit is depressurized, a large amount of incompletely burned, high-temperature gas is rapidly ejected from inside the ring main unit. Upon encountering fresh air outside the depressurization port, there is a high probability of secondary combustion or even deflagration. This embodiment was invented to solve the above problem.

[0027] Please see Figures 1 to 7 As shown, an embodiment of the present invention provides a pressure relief assembly for a primary and secondary fusion ring network box, comprising a side plate 1, a pressure relief section 2, and a flow guiding section 3. The pressure relief section 2 includes a pressure relief plate 21 disposed on the side plate 1 and a limiting component 22. The limiting component 22 can limit the pressure relief plate 21. The pressure relief section 2 also includes a pressure relief hole 23 formed on the side plate 1. The pressure relief plate 21 is closably disposed at the pressure relief hole 23. The limiting component 22 is used to hold the pressure relief plate 21 in a closed position that blocks the pressure relief hole 23, and can... When the internal pressure of the ring network box exceeds the set value, the pressure relief plate 21 is released, causing the pressure relief hole 23 to open. The flow guide 3 includes a cooling box 31 and a flow guide 32 installed on the side plate 1. The cooling box 31 is filled with a cooling medium. When the ring network box is depressurized, the cooling box 31 can spray out the medium. The flow guide 32 can guide the cooling medium sprayed out by the cooling box 31, cool the gas at the pressure relief hole 23, and create a negative pressure at the pressure relief hole 23. The cooling medium is high-pressure nitrogen gas with a low temperature.

[0028] Please see Figure 2 and Figure 4 As shown, the flow guide 32 is annular and concentrically arranged with the pressure relief hole 23. The flow guide 32 has a first through hole 321 inside, and the cooling box 31 has a second through hole 311 inside. The first through hole 321 and the second through hole 311 are connected.

[0029] Please see Figure 5 and Figure 6 As shown, the limiting component 22 includes a mounting member 221 mounted on the side plate 1. A limiting plate 222 is slidably connected inside the mounting member 221. A first elastic member 223 is fixedly connected inside the mounting member 221. One end of the first elastic member 223 is fixedly connected to the mounting member 221, and the other end of the first elastic member 223 is fixedly connected to the limiting plate 222. One end of the limiting plate 222 can abut against the pressure relief plate 21 to lock it in the closed position. The first elastic member 223 applies an elastic force to the limiting plate 222 to keep it abutting against the pressure relief plate 21.

[0030] Please see Figure 5 and Figure 6As shown, an elastic gas storage part 224 is fixedly connected to the end of the mounting part 221 away from the first elastic member 223. One end of the elastic gas storage part 224 is in contact with the limiting plate 222. A third through hole is opened inside the elastic gas storage part 224. A sealing member 312 is slidably connected inside the cooling box 31. The sealing member 312 can seal the second through hole 311. A support plate 313 is fixedly connected to one end of the sealing member 312.

[0031] Please see Figure 5 and Figure 6 As shown, a slide rod 314 is slidably connected inside the mounting component 221. One end of the slide rod 314 extends into the interior of the cooling box 31 and is fixedly connected to the support plate 313. The end of the slide rod 314 away from the support plate 313 is in contact with the limiting plate 222. When the elastic gas storage part 224 expands, the elastic gas storage part 224 can squeeze the limiting plate 222, causing the limiting plate 222 to push the slide rod 314 and drive the sealing member 312 to move, so as to open the second through hole 311.

[0032] Please see Figure 2 and Figure 3 As shown, a first connecting member is fixedly connected to the end of the pressure relief plate 21 away from the limiting plate 222. A rotating shaft is rotatably connected inside the first connecting member. A second connecting member is fixedly connected to the side plate 1. The second connecting member is rotatably connected to the rotating shaft. A torsion spring for driving the rotating shaft is provided inside the second connecting member. The torsion spring is used to drive the pressure relief plate 21 to the open position. This is prior art and will not be described in detail here.

[0033] Please see Figure 7 As shown, the flow guide 32 is hollow, and the first through hole 321 is opened at the end of the flow guide 32 near the pressure relief hole 23. The end of the flow guide 32 away from the pressure relief plate 21 is arc-shaped to guide the cooling medium to form a jet and generate negative pressure in the outlet area of ​​the pressure relief hole 23. The end of the flow guide 32 away from the pressure relief plate 21 is provided with a flow guide groove for the internal airflow to pass through. The flow area of ​​the flow guide groove is smaller than the flow area of ​​the first through hole 321, so that the gas and cooling medium inside the flow guide 32 can flow out.

[0034] Please see Figure 1 and Figure 2 As shown, a primary and secondary fusion ring network box includes a box body 4. Multiple detection and gas storage sections 41 are provided inside the box body 4. A fourth through hole is opened inside the multiple detection and gas storage sections 41, and the fourth through hole is connected to a third through hole. A side plate 1 is fixedly connected to one end of the box body 4. When the pressure inside the box body 4 increases, the pressure squeezes the detection and gas storage sections 41, causing the gas inside to enter the elastic gas storage section 224 through the fourth through hole and the third through hole, causing the elastic gas storage section 224 to expand.

[0035] During use, when the gas inside the housing 4 heats up and expands, generating pressure and high temperature, the increased internal pressure of the housing 4 causes the detection gas storage section 41 to be squeezed. This allows the gas inside the detection gas storage section 41 to enter the elastic gas storage section 224 through the fourth and third through holes, causing the elastic gas storage section 224 to expand. This causes the limiting plate 222 to move away from the pressure relief plate 21. When the limiting plate 222 moves to the point where it no longer abuts against the pressure relief plate 21, the torsion spring inside the second connector causes the pressure relief plate 21 to rotate, causing it to quickly spring open, thus allowing the gas inside the housing 4 to escape. The gas can be discharged from the pressure relief hole 23. As the limiting plate 222 moves away from the pressure relief plate 21, it squeezes the slide rod 314, causing the slide rod 314 to move the sealing element 312 and open the second through hole 311. This allows the cooling medium inside the cooling box 31 and the gas inside the box 4 to be discharged through the pressure relief hole 23 at the same time. This allows the gas inside the box 4 to come into contact with the cooling medium at the pressure relief hole 23 and mix and cool down when it is discharged, thereby preventing the rapid ejection of a large amount of incompletely burned high-temperature gas flow, which could cause secondary combustion or even deflagration.

[0036] Example 2

[0037] In practical use, it was found that the existing pressure relief method relies on the air pressure inside the ring network box to break through the pressure relief plate and be discharged through the pressure relief port. This method cannot quickly remove the gas generated inside the ring network box, resulting in a slow pressure relief speed. Further improvements have been made based on the above embodiments.

[0038] When the pressure relief plate 21 is opened, the second through hole 311 inside the cooling tank 31 is also opened, allowing the cooling medium inside the cooling tank 31 to enter the guide member 32 through the second through hole 311 and the first through hole 321. Since the guide groove of the guide member 32 is located at the end away from the pressure relief hole 23, the cooling medium flows through the arc-shaped channel inside the guide member 32 and is discharged from the guide groove. Because the flow area of ​​the guide groove is smaller than the flow area at the first through hole 321, and the cooling medium inside the cooling tank 31 continuously enters the guide member 32, the cooling medium flows from... When the gas is discharged from the guide channel, a high-speed jet is formed, creating a low-pressure zone at the outlet of the pressure relief hole 23. This increases the pressure difference between the inside of the box and the outlet, causing the gas at the pressure relief hole 23 to flow outward together. This accelerates the release of high-pressure gas inside the box 4. Furthermore, due to the Coanda effect of the gas, the gas flows along the surface of the guide member 32. As a result, when the cooling medium inside the guide member 32 is ejected from the guide channel, it is located outside the pressure relief hole 23, which more effectively confines the high-temperature gas within the core area of ​​the jet, allowing it to mix and cool fully with the cooling medium. At the same time, it prevents the high-temperature gas from splashing to the side or upward.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pressure relief assembly for a primary and secondary integrated ring network box, comprising a side plate (1), characterized in that, Also includes: The pressure relief part (2) includes a pressure relief plate (21) and a limiting component (22) disposed on the side plate (1). The limiting component (22) can limit the pressure relief plate (21). The pressure relief part (2) also includes a pressure relief hole (23) opened on the side plate (1). The flow guide (3) includes a cooling box (31) and a flow guide (32) disposed on the side plate (1). The cooling box (31) is provided with a cooling medium. When the ring network box is depressurized, the cooling box (31) can spray out the medium. The flow guide (32) can guide the cooling medium sprayed out by the cooling box (31), cool the gas at the pressure relief hole (23), and make a negative pressure at the pressure relief hole (23). The flow guide (32) is annular and concentrically arranged with the pressure relief hole (23). The flow guide (32) has a first through hole (321) inside, and the cooling box (31) has a second through hole (311) inside. The first through hole (321) and the second through hole (311) are connected. The flow guide (32) is hollow. The first through hole (321) is opened at one end of the flow guide (32) near the pressure relief hole (23). The end of the flow guide (32) away from the pressure relief plate (21) is arc-shaped. The end of the flow guide (32) away from the pressure relief plate (21) has a flow channel for the internal airflow to pass through. The flow area of ​​the flow channel is smaller than the flow area of ​​the first through hole (321).

2. The primary and secondary integrated ring network box pressure relief assembly according to claim 1, characterized in that: The limiting component (22) includes a mounting part (221) installed on the side plate (1), a limiting plate (222) is slidably connected inside the mounting part (221), and a first elastic element (223) is fixedly connected inside the mounting part (221). One end of the first elastic element (223) is fixedly connected to the mounting part (221), and the other end of the first elastic element (223) is fixedly connected to the limiting plate (222).

3. The primary and secondary integrated ring network box pressure relief assembly according to claim 2, characterized in that: The end of the mounting component (221) away from the first elastic element (223) is fixedly connected to an elastic gas storage part (224). One end of the elastic gas storage part (224) is in contact with the limiting plate (222). A third through hole is opened inside the elastic gas storage part (224).

4. The primary and secondary integrated ring network box pressure relief assembly according to claim 3, characterized in that: The cooling box (31) is slidably connected to a sealing element (312), which can seal the second through hole (311). One end of the sealing element (312) is fixedly connected to a support plate (313).

5. The primary and secondary integrated ring network box pressure relief assembly according to claim 4, characterized in that: The mounting component (221) has a sliding rod (314) inside. One end of the sliding rod (314) extends into the cooling box (31) and is fixedly connected to the support plate (313). The end of the sliding rod (314) away from the support plate (313) is in contact with the limiting plate (222).

6. The primary and secondary integrated ring network box pressure relief assembly according to claim 5, characterized in that: The pressure relief plate (21) is fixedly connected to a first connector at one end away from the limiting plate (222). The first connector is rotatably connected to a rotating shaft. The side plate (1) is fixedly connected to a second connector. The second connector is rotatably connected to the rotating shaft. The second connector is provided with a torsion spring for driving the rotating shaft to rotate.

7. A primary and secondary integrated ring main unit, employing the pressure relief assembly of a primary and secondary integrated ring main unit as described in claim 6, characterized in that: Includes a housing (4), inside which are provided multiple detection and storage gas sections (41), and inside each of the multiple detection and storage gas sections (41) are provided a fourth through hole, which is connected to the third through hole, and the side plate (1) is fixedly connected to one end of the housing (4).

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