Pipeline nitrogen injection and oil discharge explosion-proof insertion device

Abstract

The utility model discloses a pipeline nitrogen injection and oil discharge explosion-proof insertion device which comprises a cabinet body, a three-way pipe is arranged in the cabinet body, three ends of the three-way pipe penetrate through the cabinet body in a sealed mode, a sealing plate is arranged above the three-way pipe and is in sliding connection with the inner side wall of the cabinet body, a fixing plate is arranged above the sealing plate, and the fixing plate is in sliding connection with the inner side wall of the cabinet body. The fixing plate is fixedly connected with the inner side wall of the cabinet body, a buffering mechanism used for buffering the cabinet body is arranged on the fixing plate, a sliding rod is fixedly connected to the upper end of the sealing plate, the upper end of the sliding rod penetrates through the fixing plate in a sealed and sliding mode and is fixedly connected with a first metal plate, and a second metal plate is fixedly connected to the top in the cabinet body. A pressure relief plate is arranged below the three-way pipe, and a pressure relief mechanism is arranged in the pressure relief plate. The pressure in the three-way pipe can be released, the situation that an oil way pipeline is damaged due to too large pressure is avoided, and the risks of oil leakage and explosion are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fire extinguishing devices, in particular to an explosion-proof insertion device for pipeline nitrogen injection and oil discharge. Background Art

[0002] Power transformers are one of the most important equipment in power plants and substations. The most commonly used are oil-immersed transformers. Due to their own structure, the insulation materials used, and the operating conditions of the transformer, oil-immersed transformers have the hidden danger of fire accidents. Transformer explosions and fires are generally caused by internal insulation damage, which is caused by: overload, operating overvoltage, lightning overvoltage, gradual aging of insulation, moisture in transformer oil or oil acidification and insulation level decline. Once the insulation breakdown causes an arc, the oil temperature and pressure will increase sharply, the pressure in the box will rise sharply, the pressure release device will be activated, and the flammable gas, liquid and flames will spray out to form a fire. In severe cases, the oil tank will crack, and air will enter the box and mix with the flammable gas to explode. The fire is difficult to extinguish, and a large amount of burning oil will gush out, and then the entire substation will be on fire.

[0003] At present, when extinguishing a transformer fire, the fire extinguishing method of draining oil and injecting nitrogen is mostly used. When the transformer oil pipeline is blocked, injecting nitrogen into the oil pipeline is likely to cause the internal pressure of the pipeline to increase. The existing oil draining and nitrogen injection device does not have a pressure relief function. When nitrogen is continuously injected, the oil pipeline is prone to damage, and the oil inside the pipeline flows out, causing a larger fire or even an explosion.

[0004] To this end, we proposed a pipeline nitrogen injection and oil discharge explosion-proof insertion device to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a pipeline nitrogen injection and oil discharge explosion-proof insertion device to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A pipeline nitrogen injection and oil discharge explosion-proof insertion device comprises a cabinet body, a three-way pipe is arranged in the cabinet body, the three ends of the three-way pipe are all sealed and penetrated through the cabinet body, a sealing plate is arranged above the three-way pipe, the sealing plate is slidably connected to the inner wall of the cabinet body, a fixing plate is arranged above the sealing plate, the fixing plate is fixedly connected to the inner wall of the cabinet body, a buffer mechanism for buffering the cabinet body is arranged on the fixing plate, the upper end of the sealing plate is fixedly connected to a sliding rod, the upper end of the sliding rod seals and slides through the fixing plate and is fixedly connected to a first metal plate, the top of the cabinet body is fixedly connected to a second metal plate, a pressure relief plate is arranged below the three-way pipe, and a pressure relief mechanism is arranged in the pressure relief plate.

[0008] Further, the buffer mechanism includes two grooves provided at the lower end of the fixing plate. A fixing rod is fixedly connected inside the groove. A spring and a slider are sleeved outside the fixing rod. The slider is slidably connected to the fixing rod and the inner side wall of the groove. Two ends of the spring are respectively fixedly connected to the groove and the slider. The lower end of the slider is rotatably connected to a deflection plate. The lower end of the deflection plate is rotatably connected to the upper end of the sealing plate.

[0009] Further, the pressure relief mechanism includes a cavity provided inside the pressure relief plate. A moving plate is hermetically slidably connected inside the cavity. A motor is fixedly connected inside the cavity. A threaded rod is coaxially and fixedly connected to the driving shaft of the motor. The threaded rod is threadedly connected to the moving plate. The pressure relief plate is provided with a pressure relief hole penetrating up and down, and the pressure relief hole penetrates through the cavity.

[0010] Further, both the first metal plate and the second metal plate are electrically connected to the motor, and the motor is electrically connected to an external alarm device.

[0011] Further, the tee pipe is an explosion-proof pipe, and solenoid valves are provided at all three ends of the tee pipe.

[0012] Further, two through holes are provided through the front end of the cabinet body. Two cabinet doors are hinged inside the two through holes, and the two cabinet doors are respectively located on the left and right sides of the tee pipe.

[0013] Further, a constant pressure hole is provided in the part of the tee pipe located inside the cabinet body.

[0014] Compared with the prior art, the beneficial effects of the present utility model are at least as follows:

[0015] By providing the buffer mechanism and the pressure relief mechanism, when the oil pipeline is blocked and nitrogen is injected into the oil pipeline through the tee pipe, the pressure inside the tee pipe is too high. The air pressure pushes the sealing plate to rise and fall. The sealing plate pushes the sliding rod and the first metal plate to rise and fall until the first metal plate abuts against the second metal plate. At this time, the power supply of the motor is turned on. The motor drives the threaded rod to rotate. The threaded rod drives the moving plate to move, opens the pressure relief hole, releases the pressure to the lower side of the cabinet body, and issues an alarm to the outside, avoiding damage to the oil pipeline caused by excessive pressure, and reducing the risks of oil leakage and explosion.

[0016] The present utility model can release the pressure inside the tee pipe, avoid damage to the oil pipeline caused by excessive pressure, and reduce the risks of oil leakage and explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a structural sectional view of the present utility model;

[0019] Figure 3 This is a structural perspective view of the present utility model;

[0020] Figure 4 This is a structural perspective view of the pressure relief plate in the present utility model.

[0021] As shown in the figure: 1. Cabinet body; 2. Three-way pipe; 3. Sealing plate; 4. Fixed plate; 5. Buffer mechanism; 6. Slide bar; 7. First metal plate; 8. Second metal plate; 9. Pressure relief plate; 10. Pressure relief mechanism; 11. Groove; 12. Fixed rod; 13. Spring; 14. Slide block; 15. Slide block; 16. Cavity; 17. Moving plate; 18. Motor; 19. Threaded rod; 20. Pressure relief hole; 21. Box door; 22. Solenoid valve; 23. Constant pressure hole. Specific embodiments

[0022] The following will describe the present utility model in detail in conjunction with the specific embodiments shown in the drawings. However, these embodiments do not limit the present utility model, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these embodiments is included in the protection scope of the present utility model.

[0023] Please refer to Figures 1 to 4 , a pipeline nitrogen injection and oil drainage explosion-proof insertion device, including a cabinet body 1, a three-way pipe 2 is arranged inside the cabinet body 1. It should be noted that a constant pressure hole 23 is provided in the part of the three-way pipe 2 located inside the cabinet body 1. It should be explained that the constant pressure hole 23 is used to maintain the air pressure between the sealing plate 3 and the pressure relief plate 9 to be the same as that inside the three-way hole 2, playing a role in pressure monitoring. When the pressure is too high, an alarm is issued through an external alarm device and pressure relief is carried out. It should be explained that the three-way pipe 2 is an explosion-proof pipe, solenoid valves 22 are arranged at all three ends of the three-way pipe 2, all three ends of the three-way pipe 2 are hermetically penetrated through the cabinet body 1, a sealing plate 3 is arranged above the three-way pipe 2, and the sealing plate 3 is slidably connected to the inner side wall of the cabinet body 1.

[0024] In this embodiment, a fixed plate 4 is arranged above the sealing plate 3, the fixed plate 4 is fixedly connected to the inner side wall of the cabinet body 1, and a buffer mechanism 5 for buffering the cabinet body 1 is arranged on the fixed plate 4. Specifically, the buffer mechanism 5 includes two grooves 11 arranged at the lower end of the fixed plate 4, a fixed rod 12 is fixedly connected inside the groove 11, a spring 13 and a slide block 14 are sleeved outside the fixed rod 12, the slide block 14 is slidably connected to the fixed rod 12 and the inner side wall of the groove 11, two ends of the spring 13 are respectively fixedly connected to the groove 11 and the slide block 14, a deflecting plate 15 is rotatably connected to the lower end of the slide block 14, the lower end of the deflecting plate 15 is rotatably connected to the upper end of the sealing plate 3, a slide bar 6 is fixedly connected to the upper end of the sealing plate 3, and the upper end of the slide bar 6 is hermetically slid through the fixed plate 4 and fixedly connected to a first metal plate 7.

[0025] In this embodiment, a second metal plate 8 is fixedly connected to the inner top of the cabinet body 1. It should be noted that both the first metal plate 7 and the second metal plate 8 are electrically connected to the motor 18, and the motor 18 is electrically connected to an external alarm device. A pressure relief plate 9 is provided below the three-way pipe 2, and a pressure relief mechanism 10 is provided inside the pressure relief plate 9. It is worth mentioning that the pressure relief mechanism 10 includes a cavity 16 provided inside the pressure relief plate 9. A moving plate 17 is hermetically slidably connected inside the cavity 16. A motor 18 is fixedly connected inside the cavity 16. A threaded rod 19 is coaxially fixedly connected to the drive shaft of the motor 18. The threaded rod 19 is threadedly connected to the moving plate 17. The pressure relief plate 9 is provided with a pressure relief hole 20 penetrating through it up and down, and the pressure relief hole 20 penetrates through the cavity 16. It should be noted that two through holes are provided through the front end of the cabinet body 1, and two cabinet doors 21 are hinged inside the two through holes. The two cabinet doors 21 are respectively located on the left and right sides of the three-way pipe 2.

[0026] In this embodiment, when the oil pipeline is blocked and nitrogen is injected into the oil pipeline through the three-way pipe 2, the pressure inside the three-way pipe 2 is too high. The air pressure pushes the sealing plate 3 to move up and down, and the sealing plate 3 pushes the sliding rod 6 and the first metal plate 7 to move up and down until the first metal plate 7 abuts against the second metal plate 8. At this time, the power supply of the motor 18 is turned on. The motor 18 drives the threaded rod 19 to rotate, and the threaded rod 19 drives the moving plate 17 to move, opening the pressure relief hole 20, releasing the pressure to the lower side of the cabinet body 1, and sending an alarm to the outside.

[0027] It should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0028] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation manners of the present invention, and they are not used to limit the protection scope of the present invention. Any equivalent implementation manners or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipeline nitrogen injection and oil discharge explosion-proof insertion device, comprising a cabinet (1), characterized in that: A three-way pipe (2) is provided in the cabinet (1), and the three ends of the three-way pipe (2) are all sealed and penetrate the cabinet (1). A sealing plate (3) is provided above the three-way pipe (2), and the sealing plate (3) is slidably connected to the inner wall of the cabinet (1). A fixing plate (4) is provided above the sealing plate (3), and the fixing plate (4) is fixedly connected to the inner wall of the cabinet (1). A buffer mechanism (5) for buffering the cabinet (1) is provided on the fixing plate (4). The upper end of the sealing plate (3) is fixedly connected to a sliding rod (6), and the upper end of the sliding rod (6) is sealed and slidably penetrates the fixing plate (4) and is fixedly connected to a first metal plate (7). A second metal plate (8) is fixedly connected to the top of the cabinet (1). A pressure relief plate (9) is provided below the three-way pipe (2), and a pressure relief mechanism (10) is provided inside the pressure relief plate (9).

2. The pipeline nitrogen injection and oil discharge explosion-proof insertion device according to claim 1 is characterized by: The buffer mechanism (5) comprises two grooves (11) arranged at the lower end of the fixed plate (4), a fixed rod (12) is fixedly connected in the groove (11), a spring (13) and a slider (14) are provided on the outer sleeve of the fixed rod (12), the slider (14) is slidably connected to the fixed rod (12) and the inner wall of the groove (11), the two ends of the spring (13) are respectively fixedly connected to the groove (11) and the slider (14), the lower end of the slider (14) is rotatably connected to a deflection plate (15), and the lower end of the deflection plate (15) is rotatably connected to the upper end of the sealing plate (3).

3. The pipeline nitrogen injection and oil discharge explosion-proof insertion device according to claim 1 is characterized by: The pressure relief mechanism (10) comprises a cavity (16) arranged in a pressure relief plate (9), a movable plate (17) is sealingly and slidably connected in the cavity (16), a motor (18) is fixedly connected in the cavity (16), a threaded rod (19) is coaxially and fixedly connected to the drive shaft of the motor (18), the threaded rod (19) is threadedly connected to the movable plate (17), and the pressure relief plate (9) is provided with pressure relief holes (20) penetrating from top to bottom, and the pressure relief holes (20) are arranged through the cavity (16).

4. The pipeline nitrogen injection and oil discharge explosion-proof insertion device according to claim 3 is characterized by: The first metal plate (7) and the second metal plate (8) are both electrically connected to a motor (18), and the motor (18) is electrically connected to an external alarm device.

5. The pipeline nitrogen injection and oil discharge explosion-proof insertion device according to claim 1 is characterized by: The three-way pipe (2) is an explosion-proof pipe, and three ends of the three-way pipe (2) are each provided with an electromagnetic valve (22).

6. The pipeline nitrogen injection and oil discharge explosion-proof insertion device according to claim 1 is characterized by: Two through holes are formed through the front end of the cabinet body (1), and cabinet doors (21) are hinged in the two through holes. The two cabinet doors (21) are respectively located on the left and right sides of the three-way pipe (2).

7. The explosion-proof insertion device for nitrogen injection and oil discharge in pipeline according to claim 1, characterized in that: The portion of the three-way pipe (2) located inside the cabinet (1) is provided with a constant pressure hole (23).

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