Ring main unit pressure relief device and ring main unit thereof

Abstract

The invention belongs to the field of ring main units, and particularly relates to a ring main unit pressure relief device and a ring main unit thereof.The ring main unit pressure relief device comprises a cabinet body and a gas treatment assembly, the gas treatment assembly comprises a first pressure relief pipeline, the first pressure relief pipeline is fixedly installed on the outer wall of the cabinet body, and one end of the first pressure relief pipeline extends into the cabinet body; the bottom of the first pressure relief pipeline fixedly communicates with a second pressure relief pipeline, the bottom of the second pressure relief pipeline fixedly communicates with a sleeve, and a second one-way valve is arranged on the inner wall of the second pressure relief pipeline; according to the ring main unit pressure relief device and the ring main unit thereof, low fluoride in SF6 gas is treated through the gas treatment assembly, the situation that the low fluoride is exhausted to the outside and threatens the health of surrounding constructors is avoided, the SF6 gas exhausted from the gas conveying pipeline circulates along the inclined face of the bottom of the extension plate, the SF6 gas can be better fused with an alkaline solution, and the safety of the ring main unit is improved. And by arranging the spoiler, SF6 gas is wrapped, and the retention time of the SF6 gas in the alkaline solution is prolonged.

Description

Technical Field

[0001] The invention belongs to the field of ring network cabinets, in particular to a ring network cabinet pressure relief device and a ring network cabinet thereof. Background Art

[0002] The ring main unit is a very common electrical equipment. Most existing ring main units are equipped with a ring main unit chamber, and the air chamber of the ring main unit is filled with insulating gas of a certain pressure to ensure the safe operation of the ring main unit. The insulating gas filled in the air chamber of the existing ring main unit is mostly SF6 gas, which has strong insulation and arc extinguishing capabilities. When an arc fault occurs in the air chamber of the ring main unit, the gas pressure in the air chamber of the ring main unit rises suddenly. In order to reduce the pressure of the gas on the air chamber of the ring main unit and ensure the personal safety of the operators, a pressure relief device is usually installed on the air chamber of the ring main unit to allow the gas to be quickly discharged from the air chamber of the ring main unit; However, when a short circuit occurs in the ring network cabinet, under the action of the fault arc, SF6 gas will decompose to produce some low-fluoride compounds, which will cause damage to the human respiratory system, eyes, skin, etc. The existing pressure relief device can only discharge the expanded gas, and it is not convenient to purify the discharged low-fluoride gas. If the low-fluoride compounds are allowed to leak, it will have a great impact on the health of the surrounding construction workers. In addition, the existing pressure relief device can only discharge part of the expanded SF6 gas, and the remaining part of the SF6 gas carrying low-fluoride compounds will remain in the ring network cabinet, which will affect the maintenance personnel when the ring network cabinet is opened for maintenance. In addition, after the ring network cabinet is depressurized, there will still be a fault arc inside. The existing pressure relief device cannot replenish SF6 gas in the ring network cabinet in time after the pressure relief.

[0003] To this end, the present invention provides a ring main unit pressure relief device and a ring main unit thereof. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art and solve the problem that the existing pressure relief device can only discharge expanded gas but is not convenient for purifying the discharged low-fluoride gas, and if the low-fluoride gas is allowed to leak, it will have a great impact on the health of surrounding construction workers, and the existing pressure relief device can only discharge part of the expanded SF6 gas, and the remaining part of the SF6 gas carrying low-fluoride will remain in the ring network cabinet, which will affect the maintenance personnel when the ring network cabinet is opened for maintenance. In addition, after the ring network cabinet is depressurized, there will still be a fault arc inside, and the existing pressure relief device cannot replenish SF6 gas in the ring network cabinet in time after the pressure relief. The present invention proposes a ring network cabinet pressure relief device and a ring network cabinet thereof.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a ring network cabinet pressure relief device described in the present invention includes a cabinet and a gas processing component, the gas processing component includes a first pressure relief pipe, the first pressure relief pipe is fixedly installed on the outer wall of the cabinet and one end of the first pressure relief pipe extends to the interior of the cabinet, the bottom of the first pressure relief pipe is fixedly connected to the second pressure relief pipe, the bottom of the second pressure relief pipe is fixedly connected to the sleeve, the inner wall of the second pressure relief pipe is provided with a second one-way valve, the second one-way valve is opened from top to bottom, the bottom of the sleeve is provided with an air outlet, the interior of the sleeve is provided with a gas processing unit, the inner wall of the first pressure relief pipe is slidably connected to a piston head, one side of the piston head is fixedly connected to a sliding shaft, one end of the sliding shaft passes through the first pressure relief pipe and is fixedly connected to a limiting block, the outer wall of the sliding shaft is sleeved with a first spring, one end of the first spring is fixedly connected to the piston head, and the other end of the first spring is fixedly connected to the first pressure relief pipe.

[0006] Preferably, the gas processing unit includes an extrusion block, which is arranged inside the sleeve and slidably connected to the sleeve, an exhaust gas treatment chamber is opened inside the extrusion block, an air outlet groove is opened inside the extrusion block, one end of the air outlet groove is communicated with the exhaust gas treatment chamber, a gas pipeline is fixedly connected to the top of the extrusion block, one end of the gas pipeline extends to the inside of the exhaust gas treatment chamber, two damping rods are symmetrically fixedly connected to the inner wall of the sleeve, the outer walls of the two damping rods are slidably connected to sliders, the tops of the two sliders are rotatably connected to connecting shafts, and the two connecting shafts are slidably connected to the extrusion block, the outer walls of the two damping rods are sleeved with second springs, one end of the two second springs are fixedly connected to the sleeve, and the other ends of the two second springs are respectively fixedly connected to the two sliders, the top of the extrusion block is fixedly connected to a support ring, the top of the support ring is fixedly connected to a top plate, the top plate fits the top of the inner wall of the sleeve, the outer wall of the support ring is equidistantly opened with a plurality of air inlets, and an activated carbon plate is arranged inside the air inlet.

[0007] Preferably, an extension plate is fixedly connected to the outer wall of the gas pipeline, an annular slope is arranged at the bottom of the extension plate, a baffle is fixedly connected to the bottom of the extension plate, the baffle is arranged in an annular shape and its bottom is arranged as an annular slope, and a baffle is fixedly connected to the inner wall of the extrusion block and located above the extension plate.

[0008] Preferably, a cavity is opened inside the cabinet, a pressure relief valve is arranged on the top of the cavity, an air intake pipe is fixedly connected to the top of the cabinet, one end of the air intake pipe extends to the inside of the cavity, the other end of the air intake pipe extends to the inside of the cabinet, and an air intake unit is arranged at the bottom of the cabinet.

[0009] Preferably, the air intake unit includes a first motor, which is fixedly installed at the bottom of the cabinet, an output end of the first motor extends to the interior of the cabinet and is fixedly connected to a rotating rod, the top of the rotating rod is fixedly connected to an electric telescopic rod, and the output end of the electric telescopic rod is fixedly connected to a push rod, the bottom of the air intake duct is fixedly connected to a sleeve box, the bottom of the sleeve box extends to the interior of the cabinet, the inner wall of the sleeve box is slidably connected to a piston plate, the bottom of the piston plate is fixedly connected to a piston rod, the bottom of the piston rod passes through the sleeve box and is fixedly connected to a push plate, the outer wall of the piston rod is sleeved with a fourth spring, the top of the fourth spring is fixedly connected to the sleeve box, the bottom of the fourth spring is fixedly connected to the push plate, the bottom of the push plate is symmetrically fixedly connected with two protrusions, both sides of the protrusion are set to inclined surfaces, and two first one-way valves are symmetrically arranged inside the air intake duct with the sleeve box as the center, and the two first one-way valves are opened from right to left.

[0010] Preferably, an air collecting plate is fixedly connected to the inner wall of the cabinet, the bottom of the air collecting plate is set as a symmetrical inclined plane, the electric telescopic rod is rotatably connected to the air collecting plate, and one end of the first pressure relief pipe extends to the bottom of the air collecting plate.

[0011] Preferably, a fixing ring is fixedly connected to the outer wall of the rotating rod, a plurality of spoiler blades are fixedly connected to the outer wall of the fixing ring at equal intervals, and the spoiler blades are installed obliquely.

[0012] Preferably, the inner wall of the cabinet is symmetrically rotatably connected to two side panels located below the gas collecting plate, one side of the two side panels is fixedly connected to a fifth spring, one end of the two fifth springs is respectively fixedly connected to the cabinet, the other side of the two side panels is fixedly connected to an extension plate, the extension plate is installed at an angle, the outer wall of the cabinet is symmetrically fixedly connected to two second motors, the output ends of the two second motors extend to the interior of the cabinet and are fixedly connected to top blocks.

[0013] Preferably, the inner wall of the air outlet is fixedly connected to a fixing frame, the inner wall of the fixing frame is rotatably connected to a rotating shaft, the top of the rotating shaft is fixedly connected to a fan blade, the bottom of the rotating shaft is fixedly connected to a toggle rod, the bottom of the sleeve is symmetrically fixedly connected to two third springs, the bottoms of the two third springs are fixedly connected to a bell, and the toggle rod is used in conjunction with the bell.

[0014] A ring main unit is provided with the above-mentioned ring main unit pressure relief device.

[0015] The beneficial effects of the present invention are as follows: 1. A ring main unit pressure relief device and a ring main unit thereof described in the present invention process low fluoride in SF6 gas through a gas processing component to prevent low fluoride from being discharged to the outside and threatening the health of surrounding construction workers. The SF6 gas discharged from the gas pipeline flows along the inclined surface at the bottom of the extension plate, so that the SF6 gas can be better dissolved in the alkaline solution. The SF6 gas is wrapped by the provided baffle plate to extend the residence time of the SF6 gas in the alkaline solution.

[0016] 2. The ring main unit pressure relief device and the ring main unit thereof described in the present invention, after the pressure is relieved in the cabinet, controls the SF6 gas to enter the cabinet along the air intake pipe through the air intake unit, and replenishes the SF6 gas in the cabinet, thereby not only diluting the low fluoride in the cabinet, but also replenishing the SF6 gas in time to prevent the residual fault arc in the cabinet from causing a fire.

[0017] 3. The ring main unit pressure relief device and the ring main unit thereof described in the present invention guide the low fluorides floating upwards through the arranged gas collecting plate, so that the low fluorides accumulate at the bottom of the gas collecting plate. As the pressure of the SF6 gas in the cabinet increases, it is convenient to squeeze the low fluorides remaining in the cabinet into the first pressure relief pipe. Similarly, the squeezed low fluorides are processed by the gas processing unit.

[0018] 4. The ring main unit pressure relief device and the ring main unit thereof described in the present invention form an upwardly flowing vortex through the rotation of the spoiler blades, which is convenient for peeling off the low fluoride adhering to the cabinet body from the cabinet body, and the gas in the cabinet body is beaten by the side panels. The impact force formed by the beating can cause the low fluoride adhering to the cabinet body to be detached, thereby preventing residual low fluoride from adhering to the cabinet body. After SF6 gas is replenished in the cabinet body, the spoiler blades are kept rotating to drive the SF6 gas settled at the bottom to flow upward continuously, thereby allowing the SF6 gas to fill different positions in the cabinet body, thereby achieving a better arc treatment effect.

[0019] 5. The ring main unit pressure relief device and the ring main unit thereof described in the present invention buffer the downward moving extrusion block through the cooperation of the damping rod and the second spring, thereby releasing the impact force of the SF6 gas during pressure relief, avoiding the high-temperature, high-pressure gas inside the cabinet and the accompanying arc decomposition products from being ejected at high speed, causing burns and impact injuries to surrounding construction personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 is a stereogram of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3It is a three-dimensional diagram of the extension plate and the spoiler plate of the present invention in cooperation with each other; Figure 4 It is a stereoscopic diagram of the projection and the ejector rod of the present invention in cooperation with each other; Figure 5 It is a three-dimensional diagram of the extrusion block and the top plate of the present invention in cooperation with each other; Figure 6 The present invention Figure 2 The enlarged view of point A in the middle; Figure 7 The present invention Figure 2 The enlarged view of point B in the middle; Figure 8 The present invention Figure 2 Enlarged view of point C in the middle; Fig. 9 The present invention Figure 2 Enlarged view of point D in the middle.

[0022] In the figure: 1, cabinet; 2, first pressure relief pipe; 3, second pressure relief pipe; 4, sleeve; 5, sliding shaft; 6, piston head; 7, first spring; 8, limit block; 9, extrusion block; 10, support ring; 11, top plate; 12, air inlet; 13, activated carbon plate; 14, exhaust gas treatment chamber; 15, gas pipeline; 16, extension plate; 17, baffle plate; 18, baffle plate; 19, air outlet groove; 20, air outlet; 21, damping rod; 22, slider; 23, connecting shaft; 24, second spring; 25, third spring; 26, bell; 27, fixed Fixed frame; 28, rotating shaft; 29, fan blades; 30, toggle rod; 31, cavity; 32, pressure relief valve; 33, air intake duct; 34, sleeve; 35, piston plate; 36, piston rod; 37, fourth spring; 38, push plate; 39, bump; 40, first motor; 41, rotating rod; 42, electric telescopic rod; 43, push rod; 44, first one-way valve; 45, fixing ring; 46, spoiler blade; 47, side plate; 48, extension plate; 49, fifth spring; 50, second motor; 51, push block; 52, air collecting plate; 53, second one-way valve. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0024] like Figures 1 to 9As shown, the present invention provides a technical solution, a ring network cabinet pressure relief device, including a cabinet 1 and a gas processing component, the gas processing component including a first pressure relief pipe 2, the first pressure relief pipe 2 is fixedly installed on the outer wall of the cabinet 1 and one end of which extends to the interior of the cabinet 1, the bottom of the first pressure relief pipe 2 is fixedly connected with a second pressure relief pipe 3, the bottom of the second pressure relief pipe 3 is fixedly connected with a sleeve 4, the inner wall of the second pressure relief pipe 3 is provided with a second one-way valve 53, the second one-way valve 53 is opened from top to bottom, the bottom of the sleeve 4 is provided with an air outlet 20, the interior of the sleeve 4 is provided with a gas processing unit, the inner wall of the first pressure relief pipe 2 is slidably connected with a piston head 6, one side of the piston head 6 is fixedly connected with a sliding shaft 5, one end of the sliding shaft 5 passes through the first pressure relief pipe 2 and is fixedly connected to a limiting block 8, the outer wall of the sliding shaft 5 is sleeved with a first spring 7, one end of the first spring 7 is fixedly connected to the piston head 6, and the other end of the first spring 7 is fixedly connected to the first pressure relief pipe 2.

[0025] Through the above technical solution, when a short circuit occurs in the cabinet 1 and causes the SF6 gas to expand, the SF6 gas enters the first pressure relief pipe 2, and under the extrusion of the SF6 gas, the piston head 6 is pushed to move, and the movement of the piston head 6 drives the sliding shaft 5 to move. At this time, the piston head 6 moves to press the first spring 7, and when the piston head 6 moves to the right side of the second pressure relief pipe 3, the SF6 gas loses the obstruction of the piston head 6, and the SF6 gas enters the second pressure relief pipe 3 along the first pressure relief pipe 2, and then enters the sleeve 4. The low fluoride in the SF6 gas is processed by the gas processing component to prevent the low fluoride from being discharged to the outside and threatening the health of surrounding construction workers. The purified SF6 gas is discharged from the gas outlet 20, and the second one-way valve 53 is set to prevent the SF6 gas entering the sleeve 4 from circulating back.

[0026] Specifically, the gas processing unit includes an extrusion block 9, which is arranged inside the sleeve 4 and is slidably connected to the sleeve 4. An exhaust gas treatment chamber 14 is provided inside the extrusion block 9, and an air outlet groove 19 is provided inside the extrusion block 9. One end of the air outlet groove 19 is connected to the exhaust gas treatment chamber 14. The top of the extrusion block 9 is fixedly connected to a gas pipeline 15, and one end of the gas pipeline 15 extends to the inside of the exhaust gas treatment chamber 14. The inner wall of the sleeve 4 is symmetrically fixedly connected to two damping rods 21, and the outer walls of the two damping rods 21 are slidably connected to sliders 22, and the tops of the two sliders 22 are A connecting shaft 23 is rotatably connected, and the two connecting shafts 23 are both slidably connected to the extrusion block 9. The outer walls of the two damping rods 21 are sleeved with second springs 24, one ends of the two second springs 24 are fixedly connected to the sleeve 4, and the other ends of the two second springs 24 are respectively fixedly connected to the two sliders 22. A support ring 10 is fixedly connected to the top of the extrusion block 9, and a top plate 11 is fixedly connected to the top of the support ring 10. The top plate 11 fits the top of the inner wall of the sleeve 4. A plurality of air inlets 12 are equidistantly provided on the outer wall of the support ring 10, and an activated carbon plate 13 is arranged inside the air inlet 12.

[0027] Through the above technical solution, an alkaline solution is filled in the exhaust gas treatment chamber 14, and the SF6 gas gushing out from the second pressure relief pipe 3 hits the top plate 11 and pushes the top plate 11 to move downward. The top plate 11 drives the extrusion block 9 to move downward, so that the two connecting shafts 23 rotate downward. When the two connecting shafts 23 rotate, the two sliders 22 are driven to slide on the two damping rods 21 respectively, and the two second springs 24 are pressed. Through the cooperation of the damping rod 21 and the second spring 24, the extrusion block 9 moving downward is buffered, thereby releasing the impact force of the SF6 gas during pressure relief, avoiding the high-temperature, high-pressure gas inside the cabinet 1 and the accompanying arc decomposition products from being ejected at high speed, causing burns and impacts to the surrounding construction personnel. At this time, the SF6 gas after decompression in the cabinet 1 enters the interior of the sleeve 4 and is located above the extrusion block 9. Under the reaction force of the second spring 24, the extrusion block 9 is pushed to move slowly upward. Under the extrusion action of the extrusion block 9, the SF6 gas enters the air inlet 12. The activated carbon plate 13 arranged in the air inlet 12 is used to adsorb the circulating SF6 gas to purify the low fluoride doped therein. The SF6 gas passing through the air inlet 12 enters the interior of the alkaline solution along the gas transmission pipeline 15. The low fluoride in the SF6 gas is further treated by the alkaline solution. After entering the alkaline solution, the SF6 gas flows upward and is finally discharged along the air outlet groove 19 and the air outlet 20.

[0028] Specifically, the outer wall of the gas pipeline 15 is fixedly connected to an extension plate 16, the bottom of the extension plate 16 is provided with an annular inclined surface, the bottom of the extension plate 16 is fixedly connected to a baffle plate 17, the baffle plate 17 is arranged in an annular shape and its bottom is arranged with an annular inclined surface, and a baffle plate 18 is fixedly connected to the inner wall of the extrusion block 9 and located above the extension plate 16.

[0029] Through the above technical solution, the SF6 gas discharged from the gas pipeline 15 flows along the inclined surface at the bottom of the extension plate 16, so that the SF6 gas can be better dissolved in the alkaline solution. The baffle plate 17 is provided to wrap the SF6 gas, thereby extending the residence time of the SF6 gas in the alkaline solution. After the SF6 gas passes through the alkaline solution upward, the baffle plate 18 blocks the SF6 gas, so that the SF6 gas can stay above the alkaline solution, thereby facilitating the alkaline solution to further absorb the low fluoride in the SF6 gas.

[0030] Specifically, a cavity 31 is opened inside the cabinet 1, a pressure relief valve 32 is arranged on the top of the cavity 31, an air intake pipe 33 is fixedly connected to the top of the cabinet 1, one end of the air intake pipe 33 extends to the inside of the cavity 31, and the other end of the air intake pipe 33 extends to the inside of the cabinet 1, and an air intake unit is arranged at the bottom of the cabinet 1.

[0031] Through the above technical solution, concentrated SF6 gas is filled in the cavity 31. After the pressure in the cabinet 1 is released, the SF6 gas is controlled by the air intake unit to enter the cabinet 1 along the air intake pipe 33 to replenish the SF6 gas in the cabinet 1. This not only dilutes the low fluoride inside the cabinet 1, but also replenishes the SF6 gas in time to prevent the residual fault arc in the cabinet 1 from causing a fire.

[0032] Specifically, the air intake unit includes a first motor 40, which is fixedly installed at the bottom of the cabinet 1, and the output end of the first motor 40 extends to the inside of the cabinet 1 and is fixedly connected to a rotating rod 41, and the top of the rotating rod 41 is fixedly connected to an electric telescopic rod 42, and the output end of the electric telescopic rod 42 is fixedly connected to a top rod 43, and the bottom of the air intake pipe 33 is fixedly connected to a sleeve box 34, and the bottom of the sleeve box 34 extends to the inside of the cabinet 1, and the inner wall of the sleeve box 34 is slidably connected to a piston plate 35, and the bottom of the piston plate 35 is fixedly connected to There is a piston rod 36, the bottom of the piston rod 36 passes through the sleeve box 34 and is fixedly connected to a push plate 38, the outer wall of the piston rod 36 is sleeved with a fourth spring 37, the top of the fourth spring 37 is fixedly connected to the sleeve box 34, the bottom of the fourth spring 37 is fixedly connected to the push plate 38, and the bottom of the push plate 38 is symmetrically fixedly connected with two protrusions 39, both sides of the protrusions 39 are set as inclined surfaces, and the interior of the intake duct 33 is symmetrically provided with two first one-way valves 44 with the sleeve box 34 as the center, and the two first one-way valves 44 are opened from right to left.

[0033] Through the above technical solution, the electric telescopic rod 42 is started, and the output end of the electric telescopic rod 42 pushes the push rod 43 to move upward, so that the push rod 43 fits the bottom of the push plate 38, and the first motor 40 is started. The output shaft of the first motor 40 drives the rotating rod 41 to rotate, so that the electric telescopic rod 42 rotates, and the electric telescopic rod 42 drives the push rod 43 to rotate. When the push rod 43 rotates to a position close to the protrusion 39, it presses against the inclined surface of the side of the protrusion 39. Under the extrusion of the push rod 43, the protrusion 39 is pushed upward, and the push plate 38 is driven to move upward, so that the piston rod 36 moves upward, and the piston plate 35 moves upward. While the push plate 38 moves upward, the fourth spring 37 is pressed. When the push rod 43 After rotating to the position of disengaging from the protrusion 39, the squeezing of the push rod 43 is lost, and the piston plate 35 is driven to move downward under the action of the fourth spring 37, thereby reciprocating. After the first motor 40 is started, the piston plate 35 is driven to move up and down reciprocatingly. When the piston plate 35 moves downward, under the pulling action of the piston plate 35, the two first one-way valves 44 are cooperated to draw the concentrated SF6 gas in the cavity 31 into the sleeve box 34. When the piston plate 35 moves upward, under the squeezing action of the piston plate 35, the two first one-way valves 44 are cooperated to squeeze the concentrated SF6 gas in the sleeve box 34 along the air intake pipe 33 into the cabinet body 1, thereby continuously replenishing SF6 gas in the cabinet body 1.

[0034] Specifically, an air collecting plate 52 is fixedly connected to the inner wall of the cabinet 1 , the bottom of the air collecting plate 52 is set as a symmetrical inclined surface, the electric telescopic rod 42 is rotatably connected to the air collecting plate 52 , and one end of the first pressure relief pipe 2 extends to the bottom of the air collecting plate 52 .

[0035] Through the above technical scheme, since the density of SF6 gas is greater than that of low-fluoride gas, after SF6 gas is supplemented in the cabinet 1, the low-fluoride remaining in the cabinet 1 floats upward above the SF6 gas. The low-fluoride floating upward is guided by the arranged gas collecting plate 52, so that the low-fluoride accumulates at the bottom of the gas collecting plate 52. As the gas pressure of SF6 gas in the cabinet 1 increases, it is convenient to squeeze the low-fluoride remaining in the cabinet 1 into the first pressure relief pipe 2. Similarly, the squeezed low-fluoride is processed by the gas processing unit.

[0036] Specifically, a fixing ring 45 is fixedly connected to the outer wall of the rotating rod 41 , and a plurality of spoiler blades 46 are fixedly connected to the outer wall of the fixing ring 45 at equal intervals, and the spoiler blades 46 are installed obliquely.

[0037] Through the above technical solution, while the pressure in the cabinet 1 is released, several spoiler blades 46 rotate, and a vortex that flows upward is formed by the rotation of the spoiler blades 46, which makes it easy to peel off the low fluoride adhering to the cabinet 1 from the cabinet 1, and prevent residual low fluoride from adhering to the cabinet 1. After SF6 gas is replenished in the cabinet 1, due to the high density of SF6 gas, sedimentation is likely to occur. The electric telescopic rod 42 controls the top rod 43 to move downward, so that the top rod 43 moves to the bottom of the protrusion 39, and the first motor 40 is kept started, so that the spoiler blades 46 continue to rotate, driving the SF6 gas settled at the bottom to continue to flow upward, thereby enabling the SF6 gas to fill different positions in the cabinet 1, and the arc treatment effect is better.

[0038] Specifically, the inner wall of the cabinet 1 is symmetrically rotatably connected to two side panels 47 located below the air collecting plate 52, one side of the two side panels 47 is fixedly connected to a fifth spring 49, one end of the two fifth springs 49 is respectively fixedly connected to the cabinet 1, and the other sides of the two side panels 47 are fixedly connected to an extension plate 48, and the extension plate 48 is installed at an angle. The outer wall of the cabinet 1 is symmetrically fixedly connected to two second motors 50, and the output ends of the two second motors 50 extend to the interior of the cabinet 1 and are fixedly connected to a top block 51.

[0039] Through the above technical solution, while the low fluoride in the cabinet 1 is extruded, the two second motors 50 are started, and the output shafts of the two second motors 50 respectively drive the two top blocks 51 to rotate. When the ends of the two top blocks 51 are respectively rotated to the positions of the two extension plates 48, the two extension plates 48 are pushed to move. The movement of the two extension plates 48 respectively drives the two side plates 47 to rotate. At this time, the two fifth springs 49 are stretched. When the ends of the two top blocks 51 are rotated to the position of being separated from the two extension plates 48, under the action of the two fifth springs 49, the two side plates 47 and the two extension plates 48 are respectively driven to move toward the inside of the cabinet 1, thereby flapping the gas in the cabinet 1. The impact force formed by the flapping can cause the low fluoride adhering to the cabinet 1 to detach.

[0040] Specifically, the inner wall of the air outlet 20 is fixedly connected to a fixing frame 27, the inner wall of the fixing frame 27 is rotatably connected to a rotating shaft 28, the top of the rotating shaft 28 is fixedly connected to a fan blade 29, the bottom of the rotating shaft 28 is fixedly connected to a toggle rod 30, and the bottom of the sleeve 4 is symmetrically fixedly connected to two third springs 25, the bottoms of the two third springs 25 are fixedly connected to a bell 26, and the toggle rod 30 is used in conjunction with the bell 26.

[0041] Through the above technical solution, when the purified SF6 gas is discharged from the gas outlet 20, the circulating gas drives the fan blades 29 to rotate, so that the rotating shaft 28 rotates, and the rotation of the rotating shaft 28 drives the toggle rod 30 to rotate. The rotating toggle rod 30 continuously hits the bell 26, making the bell 26 sound, thereby helping construction personnel to promptly determine the location of the short-circuited ring network cabinet.

[0042] A ring main unit is provided with the above-mentioned ring main unit pressure relief device.

[0043] During use, when a short circuit occurs in the cabinet 1 causing the SF6 gas to expand, the SF6 gas enters the first pressure relief pipe 2, and under the extrusion of the SF6 gas, the piston head 6 is pushed to move, and the movement of the piston head 6 drives the sliding shaft 5 to move. At this time, the first spring 7 is compressed by force, and when the piston head 6 moves to the right side of the second pressure relief pipe 3, the SF6 gas loses the obstruction of the piston head 6, and the SF6 gas enters the second pressure relief pipe 3 along the first pressure relief pipe 2, and enters the sleeve 4 through the second one-way valve 53. The second one-way valve 53 is set to prevent the SF6 gas entering the sleeve 4 from circulating back. An alkaline solution is loaded into the exhaust gas treatment chamber 14 in advance, and the SF6 gas gushing out from the second one-way valve 53 hits the top plate 11. As the SF6 gas As the pressure of the cabinet 1 increases, the SF6 gas pushes the top plate 11 to move downward, thereby driving the extrusion block 9 to move downward, causing the two connecting shafts 23 to rotate downward. When the two connecting shafts 23 rotate, the two sliders 22 are driven to slide on the two damping rods 21 respectively. At this time, the two second springs 24 are pressed tightly, and the damping rod 21 cooperates with the second spring 24 to buffer the downward moving extrusion block 9, thereby releasing the impact force of the SF6 gas during pressure relief, avoiding the high-temperature, high-pressure gas inside the cabinet 1 and the accompanying arc decomposition products from being ejected at high speed, causing burns and impact injuries to the surrounding construction personnel. At this time, the SF6 gas after pressure relief in the cabinet 1 enters the interior of the sleeve 4 and is located above the extrusion block 9. Under the reaction force of the second spring 24, the extrusion block 9 is pushed to slowly The SF6 gas in the sleeve 4 is compressed by the extrusion block 9 and enters the air inlet 12. The activated carbon plate 13 arranged in the air inlet 12 adsorbs the circulating SF6 gas to purify the low fluoride mixed therein. The SF6 gas passing through the air inlet 12 enters the alkaline solution along the gas pipeline 15. The low fluoride in the SF6 gas is further treated by the alkaline solution. The SF6 gas discharged from the gas pipeline 15 flows along the inclined surface at the bottom of the extension plate 16, so that the SF6 gas can be better dissolved in the alkaline solution. The baffle plate 17 can wrap the SF6 gas to prolong the residence time of the SF6 gas in the alkaline solution. The SF6 gas passes upward through the alkaline solution. After the alkaline solution is passed through, the SF6 gas is blocked by the baffle 18, so that the SF6 gas can stay above the alkaline solution, which is convenient for the alkaline solution to further absorb the low fluoride in the SF6 gas. Finally, the purified SF6 gas is discharged along the gas outlet groove 19 and the gas outlet 20. When the SF6 gas flows in the gas outlet 20, the circulating gas drives the fan blades 29 to rotate, and the rotation of the fan blades 29 drives the rotating shaft 28 and the toggle rod 30 to rotate synchronously. The rotating toggle rod 30 continuously hits the bell 26, making the bell 26 sound, which can help construction personnel to promptly determine the position of the short-circuited ring network cabinet. Concentrated SF6 gas is filled in the cavity 31. After the pressure in the cabinet 1 is relieved, the electric telescopic rod 42 is started, and the output end of the electric telescopic rod 42 pushes the top rod 43 to move upward.As a result, the push rod 43 is fitted into the bottom of the push plate 38, and then the first motor 40 is started. The output shaft of the first motor 40 drives the rotating rod 41 to rotate. The rotation of the rotating rod 41 drives the electric telescopic rod 42 and the push rod 43 to rotate synchronously. When the push rod 43 rotates to a position close to the protrusion 39, it presses against the inclined surface of the side of the protrusion 39. Under the squeezing action of the push rod 43, the protrusion 39 and the push plate 38 are pushed upward. At the same time, the piston rod 36 is forced to drive the piston plate 35 to move upward. When the push plate 38 moves upward, the fourth spring 37 is pressed. When the push rod 43 rotates to a position disengaged from the protrusion 39, the squeezing of the push rod 43 is lost. Under the action of the fourth spring 37, the piston plate 35 is driven to move downward. Thus, reciprocating, when the piston plate 35 moves downward, the piston Under the pulling action of the plate 35, in cooperation with the two first one-way valves 44, the concentrated SF6 gas in the cavity 31 can be drawn into the sleeve box 34. When the piston plate 35 moves upward, the piston plate 35 squeezes the concentrated SF6 gas in the sleeve box 34, and in cooperation with the two first one-way valves 44, the concentrated SF6 gas in the sleeve box 34 is squeezed into the cabinet 1 along the air inlet pipe 33, thereby continuously replenishing SF6 gas in the cabinet 1. Since the density of SF6 gas is greater than that of low-fluoride gas, after SF6 gas is replenished in the cabinet 1, the low-fluoride remaining in the cabinet 1 floats upward above the SF6 gas. The gas collecting plate 52 is set to guide the low-fluoride floating upward, so that the low-fluoride accumulates at the bottom of the gas collecting plate 52. As the pressure of SF6 gas in the cabinet 1 increases, it is convenient to squeeze the low fluoride remaining in the cabinet 1 into the first pressure relief pipe 2. Similarly, the extruded low fluoride is processed by the gas processing unit. While the low fluoride in the cabinet 1 is extruded, the two second motors 50 are started, and the output ends of the two second motors 50 respectively drive the two top blocks 51 to rotate. When the ends of the top blocks 51 rotate to the position of the extension plate 48, the extension plate 48 is pushed to move, and the extension plate 48 drives the side plate 47 to rotate. At this time, the two fifth springs 49 are stretched. When the ends of the two top blocks 51 rotate to the position of being separated from the two extension plates 48, under the action of the two fifth springs 49, the two side plates 47 and the two extension plates 48 are respectively driven to move toward the inside of the cabinet 1, thereby The gas in the cabinet 1 is beaten, and the impact force formed by the beating can make the low fluoride adhering to the cabinet 1 detach. When the first motor 40 is started, it drives a plurality of spoiler blades 46 to rotate. The rotation of the spoiler blades 46 forms an upward vortex, which is convenient for peeling the low fluoride adhering to the cabinet 1 from the cabinet 1, and prevents the low fluoride from adhering to the cabinet 1. After the low fluoride in the cabinet 1 is gradually removed, the piston head 6 is reset under the action of the first spring 7 to block the second pressure relief pipe 3, so that the supplemented SF6 gas stays in the cabinet 1. After the SF6 gas is supplemented in the cabinet 1, due to the large density of the SF6 gas, it is easy to settle. The electric telescopic rod 42 controls the push rod 43 to move downward.Move the top rod 43 to the bottom of the protrusion 39, keep the first motor 40 started, and keep the spoiler blade 46 rotating, so that the SF6 gas settled at the bottom can continue to flow upward, so that the SF6 gas can fill different positions in the cabinet 1, and the arc treatment effect is better.

[0044] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A ring main unit pressure relief device, characterized in that: The invention comprises a cabinet (1) and a gas processing assembly, wherein the gas processing assembly comprises a first pressure relief pipe (2), wherein the first pressure relief pipe (2) is fixedly mounted on the outer wall of the cabinet (1) and one end of the first pressure relief pipe (2) extends into the interior of the cabinet (1), wherein the bottom of the first pressure relief pipe (2) is fixedly connected to a second pressure relief pipe (3), wherein the bottom of the second pressure relief pipe (3) is fixedly connected to a sleeve (4), wherein a second one-way valve (53) is arranged on the inner wall of the second pressure relief pipe (3), wherein the second one-way valve (53) is opened from top to bottom, and the bottom of the sleeve (4) is opened. An air outlet (20) is provided, a gas processing unit is arranged inside the sleeve (4), a piston head (6) is slidably connected to the inner wall of the first pressure relief pipe (2), a sliding shaft (5) is fixedly connected to one side of the piston head (6), one end of the sliding shaft (5) passes through the first pressure relief pipe (2) and is fixedly connected to a limiting block (8), a first spring (7) is sleeved on the outer wall of the sliding shaft (5), one end of the first spring (7) is fixedly connected to the piston head (6), and the other end of the first spring (7) is fixedly connected to the first pressure relief pipe (2).

2. A ring main unit pressure relief device according to claim 1, characterized in that: The gas processing unit comprises an extrusion block (9), the extrusion block (9) being arranged inside the sleeve (4) and being slidably connected to the sleeve (4), an exhaust gas treatment chamber (14) being provided inside the extrusion block (9), an air outlet groove (19) being provided inside the extrusion block (9), one end of the air outlet groove (19) being communicated with the exhaust gas treatment chamber (14), a gas pipeline (15) being fixedly connected to the top of the extrusion block (9), one end of the gas pipeline (15) extending to the inside of the exhaust gas treatment chamber (14), two damping rods (21) being symmetrically fixedly connected to the inner wall of the sleeve (4), the outer walls of the two damping rods (21) being slidably connected to sliders (22), the tops of the two sliders (22) being rotated The two connecting shafts (23) are slidably connected to the extrusion block (9); the outer walls of the two damping rods (21) are sleeved with second springs (24); one end of the two second springs (24) is fixedly connected to the sleeve (4); the other ends of the two second springs (24) are respectively fixedly connected to two sliders (22); the top of the extrusion block (9) is fixedly connected to a support ring (10); the top of the support ring (10) is fixedly connected to a top plate (11); the top plate (11) fits the top of the inner wall of the sleeve (4); the outer wall of the support ring (10) is provided with a plurality of air inlets (12) at equal intervals; an activated carbon plate (13) is arranged inside the air inlet (12).

3. A ring main unit pressure relief device according to claim 2, characterized in that: An extension plate (16) is fixedly connected to the outer wall of the gas transmission pipeline (15), and an annular inclined surface is arranged at the bottom of the extension plate (16). A baffle plate (17) is fixedly connected to the bottom of the extension plate (16), and the baffle plate (17) is arranged in an annular shape and its bottom is arranged as an annular inclined surface. A baffle plate (18) is fixedly connected to the inner wall of the extrusion block (9) and is located above the extension plate (16).

4. A ring main unit pressure relief device according to claim 3, characterized in that: A cavity (31) is provided inside the cabinet (1), a pressure relief valve (32) is provided at the top of the cavity (31), an air intake pipe (33) is fixedly connected to the top of the cabinet (1), one end of the air intake pipe (33) extends to the inside of the cavity (31), and the other end of the air intake pipe (33) extends to the inside of the cabinet (1), and an air intake unit is provided at the bottom of the cabinet (1).

5. A ring main unit pressure relief device according to claim 4, characterized in that: The air intake unit comprises a first motor (40), the first motor (40) being fixedly mounted at the bottom of the cabinet (1), the output end of the first motor (40) extending into the interior of the cabinet (1) and being fixedly connected to a rotating rod (41), the top of the rotating rod (41) being fixedly connected to an electric telescopic rod (42), the output end of the electric telescopic rod (42) being fixedly connected to a top rod (43), the bottom of the air intake duct (33) being fixedly connected to a sleeve box (34), the bottom of the sleeve box (34) extending into the interior of the cabinet (1), the inner wall of the sleeve box (34) being slidably connected to a piston plate (35), the bottom of the piston plate (35) being fixedly connected to A piston rod (36), the bottom of the piston rod (36) passes through the sleeve (34) and is fixedly connected to a push plate (38), the outer wall of the piston rod (36) is sleeved with a fourth spring (37), the top of the fourth spring (37) is fixedly connected to the sleeve (34), the bottom of the fourth spring (37) is fixedly connected to the push plate (38), the bottom of the push plate (38) is symmetrically fixedly connected to two protrusions (39), both sides of the protrusions (39) are arranged as inclined surfaces, and two first one-way valves (44) are symmetrically arranged inside the intake pipe (33) with the sleeve (34) as the center, and the two first one-way valves (44) are both opened from right to left.

6. A ring main unit pressure relief device according to claim 5, characterized in that: An air collecting plate (52) is fixedly connected to the inner wall of the cabinet (1), the bottom of the air collecting plate (52) is arranged as a symmetrical inclined surface, the electric telescopic rod (42) is rotatably connected to the air collecting plate (52), and one end of the first pressure relief pipe (2) extends to below the air collecting plate (52).

7. A ring main unit pressure relief device according to claim 6, characterized in that: A fixing ring (45) is fixedly connected to the outer wall of the rotating rod (41), and a plurality of spoiler blades (46) are fixedly connected to the outer wall of the fixing ring (45) at equal intervals, wherein the spoiler blades (46) are installed in an inclined manner.

8. A ring main unit pressure relief device according to claim 7, characterized in that: The inner wall of the cabinet (1) is symmetrically rotatably connected to two side plates (47) located below the gas collecting plate (52), one side of the two side plates (47) is fixedly connected to a fifth spring (49), one end of the two fifth springs (49) is respectively fixedly connected to the cabinet (1), and the other side of the two side plates (47) is fixedly connected to an extension plate (48), and the extension plate (48) is installed at an angle. The outer wall of the cabinet (1) is symmetrically fixedly connected to two second motors (50), and the output ends of the two second motors (50) extend to the interior of the cabinet (1) and are fixedly connected to a top block (51).

9. A ring main unit pressure relief device according to claim 8, characterized in that: The inner wall of the air outlet (20) is fixedly connected to a fixing frame (27), the inner wall of the fixing frame (27) is rotatably connected to a rotating shaft (28), the top of the rotating shaft (28) is fixedly connected to a fan blade (29), the bottom of the rotating shaft (28) is fixedly connected to a toggle rod (30), the bottom of the sleeve (4) is symmetrically fixedly connected to two third springs (25), the bottoms of the two third springs (25) are fixedly connected to a bell (26), and the toggle rod (30) is used in conjunction with the bell (26).

10. A ring main unit, equipped with the ring main unit pressure relief device according to any one of claims 1 to 9.

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