Ring main unit pressure relief device and ring main unit thereof

Abstract

The invention discloses a ring main unit pressure relief device and a ring main unit thereof, and relates to the technical field of ring main units, the ring main unit pressure relief device comprises a mounting plate, an air outlet piece is fixedly mounted on the surface of the mounting plate, the bottom of the air outlet piece is fixedly connected with an air storage cylinder, the air outlet end of the air outlet piece is fixedly connected with a bent pipe, and the bent pipe is fixedly connected with a pressure relief valve. A buffer part is fixedly installed on the top of the bent pipe, a pressure sensor is fixedly installed on the surface of the installation plate, and a limiting part, an air blocking part and a releasing part are installed on the surface of the installation plate. According to the ring main unit pressure relief device, through cooperation of the gas blocking piece, the release piece, the limiting piece and the pressure sensor, the gas pressure in the ring main unit is monitored in real time, and pressure relief and gas relief are conducted in time. The ring main unit comprises a cabinet body and a cabinet door rotatably installed on the surface of the cabinet body, and an observation window and a control panel are fixedly installed on the surface of the cabinet door.

Description

Technical Field

[0001] The present invention relates to the technical field of ring main units, and particularly to a pressure relief device for a ring main unit and the ring main unit. Background Art

[0002] As a key electrical equipment, ring main units are widely used in many places such as urban power grids, industrial enterprises, and residential communities. With the acceleration of urbanization and the continuous growth of power demand, higher requirements are put forward for power supply reliability and stability; During the operation of the ring main unit, when abnormal situations such as arc faults occur inside, the gas pressure in the gas chamber will suddenly increase. Excessive pressure may cause damage to the cabinet body and even lead to an explosion. Therefore, a reliable pressure relief device has become an indispensable part of the safe operation of the ring main unit; When the traditional pressure relief device relieves pressure, the gas discharge speed is too fast and there is no buffer. The powerful air flow may cause impact and damage to surrounding equipment and the environment. At the same time, the traditional pressure relief device often cannot accurately control according to the change of pressure. Either it opens the pressure relief too early, resulting in unnecessary gas discharge and affecting the insulation performance inside the ring main unit, or it opens the pressure relief too late, causing the ring main unit to bear excessive pressure and increasing the safety risk. Summary of the Invention

[0003] To achieve the above object, the present invention is realized through the following technical solutions: A pressure relief device for a ring main unit, comprising: A mounting plate, on the surface of which an air outlet member is fixedly installed. At the bottom of the air outlet member, a gas storage cylinder is fixedly connected. When the gas inside the ring main unit is quickly discharged, the gas storage cylinder can temporarily store part of the gas to buffer the discharge speed and pressure of the gas. The air outlet end of the air outlet member is fixedly connected with a bent pipe, which is used to change the gas flow direction so that the gas can smoothly enter the subsequent treatment. At the end of the bent pipe far from the air outlet member, a buffer member is fixedly installed, which buffers the discharged high-pressure gas to prevent it from causing impact and damage to surrounding equipment and the environment. On the surface of the mounting plate, a pressure sensor is fixedly installed, which is used to monitor the gas pressure inside the cabinet body of the ring main unit in real time; A gas blocking member, which is installed on the surface of the mounting plate and is arranged directly below the air outlet member; A limiting member, which penetrates through the surface of the mounting plate and is engaged with the gas blocking member in a matching manner; A release member, which is installed on the surface of the mounting plate and is arranged on the same side as the pressure sensor; Among them, the air baffle includes a servo motor, a first slide plate, and a guide member. The servo motor is electrically connected to the pressure sensor. The servo motor is fixedly installed on the surface of the mounting plate through a bracket. The output end of the servo motor is fixedly connected to a lead screw. A threaded hole is opened in the middle of the first slide plate. The slide plate is in transmission connection with the lead screw through the threaded hole. Pressure relief springs are fixedly connected to both sides of the top of the first slide plate. The top of the pressure relief spring is fixedly connected to a second slide plate. A baffle is fixedly connected to the top of the second slide plate. A card slot is opened on the surface of the second slide plate. The pressure relief spring connects the first slide plate and the second slide plate and is in an extended state under normal conditions. When pressure relief is required, the pressure relief spring releases elastic potential energy, driving the second slide plate and the baffle to move downward. The baffle no longer blocks the gas from discharging from the air outlet member. The guide member is installed on the surface of the mounting plate. The first slide plate and the baffle are slidably installed inside the guide member.

[0004] Preferably, the air outlet member includes a first outlet pipe and a second outlet pipe. The first outlet pipe is fixedly installed on the surface of the mounting plate. The first outlet pipe penetrates through the mounting plate and extends to the outside thereof. An arc-shaped connecting plate is fixedly installed between the first outlet pipe and the second outlet pipe. Protective rings are fixedly installed on the opposite surfaces of the first outlet pipe and the second outlet pipe. The baffle is slidably installed between the protective rings. The baffle is in pressing fit with the arc-shaped connecting plate. The protective ring provides a sliding track for the baffle. The arc-shaped connecting plate limits the movement range of the baffle, ensuring the accuracy of its sealing and opening actions. The arc-shaped connecting plate and the protective ring ensure that the baffle can effectively block the gas under normal conditions and can be smoothly opened during pressure relief.

[0005] Preferably, the buffer member includes a third outlet pipe. The third outlet pipe is fixedly connected to the air outlet end of the elbow pipe. The third outlet pipe continues to guide the gas passing through the elbow pipe upward. An air outlet cover is fixedly connected to the top of the third outlet pipe. Air dispersion holes are opened on the top of the air outlet cover. Spiral blades are fixedly installed on the inner wall of the third outlet pipe and the air outlet cover. The spiral blades cause the gas to generate a spiral motion during the flow process, increasing the contact area and contact time between the gas and the inner wall, further reducing the gas flow rate, and enhancing the buffering effect.

[0006] Preferably, the air outlet cover is specifically a horn-shaped structure that is wider at the top and narrower at the bottom. The air dispersion holes are evenly distributed on the top of the air outlet cover. After the gas enters the air outlet cover, due to its horn-shaped structure, the gas flow rate decreases and is discharged through the air dispersion holes, effectively reducing the impact force and noise when the gas is discharged, and protecting the safety of surrounding equipment and personnel.

[0007] Preferably, the guiding member includes a connecting block which is fixedly installed on the surface of the mounting plate. A plate sleeve is fixedly installed on the outer surface of the connecting block. The plate sleeve provides a guiding space for the sliding of the second slide plate and the baffle, ensuring their linearity and stability during the up and down movement. On both sides of the inner wall of the plate sleeve, a rotating rod is rotatably installed through a rotating shaft. The other end of the rotating rod is rotatably installed through a rotating shaft with a roller. Between both sides of the rotating rod near the roller end and the inner wall of the plate sleeve, a return spring is fixedly connected.

[0008] Preferably, the second slide plate and the baffle are slidably installed inside the plate sleeve. The roller is in extrusion fit with the second slide plate and the baffle. When the second slide plate and the baffle slide up and down, the roller plays a role in reducing friction, making the sliding process smoother. At the same time, the return springs on both sides of the rotating rod can keep the roller in contact with the second slide plate and the baffle all the time, enhancing the guiding effect.

[0009] Preferably, the limiting member includes a slider sleeve which is fixedly installed on the surface of the mounting plate. The slider sleeve penetrates through the mounting plate and extends to its outside. A slider is slidably installed inside the slider sleeve. A clamping block is fixedly installed on the surface of the slider. The clamping block is in clamping fit with the clamping groove. On both sides of the inner wall of the slider sleeve, a retaining piece is fixedly installed. On the side of the slider away from the clamping block, a push rod is fixedly connected. The other end of the push rod is fixedly connected with a push block. Between the push block and the retaining piece, a buffer spring is fixedly connected. Under normal circumstances, the buffer spring is in a compressed state. The buffer spring is arranged on the outer surface of the push rod. The slider slides inside the slider sleeve. By moving the slider, the clamping and separation of the clamping block and the clamping groove of the second slide plate are controlled, so as to realize the limiting and unlocking of the second slide plate and the baffle.

[0010] Preferably, the releasing member includes a cylinder which is fixedly installed on the surface of the mounting plate. The telescopic end of the cylinder is fixedly connected with a telescopic rod. The top of the telescopic rod is fixedly connected with a pressing block.

[0011] Preferably, the pressing block is in extrusion fit with the push block. When the telescopic end of the cylinder contracts, the pressing block moves downward away from the push block. The push block moves horizontally in the direction of the pressing block under the elastic force of the buffer spring. The push block drives the push rod to pull the slider to slide inside the slider sleeve. The slider drives the clamping block to disengage from the clamping groove of the second slide plate, releasing the limit on the second slide plate and the baffle, thus starting the pressure relief process.

[0012] A ring main unit includes a cabinet body, and a cabinet door rotatably installed on the surface of the cabinet body. An observation window and a control panel are fixedly installed on the surface of the cabinet door. An installation hole is opened on the side surface of the cabinet body. The mounting plate is fixedly connected with the cabinet body. The mounting plate is arranged on the outer side of the installation hole.

[0013] The present invention provides a pressure relief device for a ring main unit and the ring main unit. It has the following beneficial effects: 1. For the pressure relief device of this ring main unit, through the setting of the release part, when the pressure sensor monitors that the gas pressure inside the cabinet exceeds the set threshold, the control panel controls the telescopic end of the cylinder to contract, driving the telescopic rod and the extrusion block to move downward. The extrusion block disengages from the push block, and the push block moves under the action of the buffer spring to release the limit on the second slide plate and the baffle. The release part can accurately control the activation of the pressure relief device according to the internal pressure condition of the ring main unit. It receives the instruction from the control panel and quickly makes a move to release the limit on the second slide plate and the baffle, ensuring that when the internal pressure of the ring main unit is too high, the pressure relief device can respond in time to ensure the safe operation of the ring main unit.

[0014] 2. For the pressure relief device of this ring main unit, through the setting of the limiting part, under normal circumstances, the buffer spring is in a compressed state, and the clamping block is stuck into the card slot of the second slide plate. When pressure relief is required, the push block moves under the elastic force of the buffer spring, driving the slider to disengage the clamping block from the card slot. The limiting part realizes the limiting and unlocking functions of the second slide plate and the baffle. It limits the positions of the second slide plate and the baffle in the normal state to ensure that the baffle effectively blocks the gas. When the pressure relief condition is reached, it can release the limit in a timely and accurate manner to smoothly start the pressure relief process and ensure the stable operation of the pressure relief device in different working states.

[0015] 3. For the pressure relief device of this ring main unit, through the setting of the guiding part, the second slide plate and the baffle slide inside the plate sleeve, the rollers are in extrusion fit with them, and the return springs on both sides of the rotating rod keep the rollers in contact all the time. When the second slide plate and the baffle move up and down for pressure relief or reset operation, the guiding part plays a role. It provides a guiding space for the sliding of the second slide plate and the baffle, ensuring that they move stably along a straight line during the up and down movement. And the rollers reduce the friction force when the second slide plate and the baffle slide, making the sliding process smoother and enhancing the stability and reliability of the operation of the entire pressure relief device.

[0016] 4. For the pressure relief device of this ring main unit, through the setting of the buffering part, the gas enters the third outlet pipe from the elbow pipe, generates a spiral motion under the action of the spiral blade, increases the contact area and time with the inner wall, reduces the flow rate, then enters the flare-shaped air outlet cover with a wider top and a narrower bottom, further decelerates and evenly disperses, and finally discharges through the top air holes. It can effectively reduce the flow rate and impact force of the discharged gas, avoid the direct impact of high-pressure gas on the surrounding equipment and environment, and at the same time reduce the noise generated when the gas is discharged, ensuring the normal operation of the surrounding equipment and the safety of personnel.

[0017] V. For this ring main unit, through the settings of the control panel, the pressure sensor transmits the gas pressure signal inside the ring main unit cabinet monitored to the control panel. The control panel controls the action of the cylinder in the release part according to the preset threshold value. After the pressure drops to the normal range, it controls the servo motor to start. Through this intelligent control, the automation and precision of the pressure relief process of the ring main unit are realized, greatly improving the safety and stability of the operation of the ring main unit, reducing manual intervention, enhancing work efficiency, and reducing safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic installation diagram of the pressure relief device of the ring main unit of the present invention and the ring main unit body; Figure 2 It is a schematic external view diagram of the pressure relief device of the ring main unit of the present invention; Figure 3 It is a schematic structural diagram of the pressure relief device of the ring main unit of the present invention; Figure 4 It is a schematic structural diagram of the air outlet part of the present invention; Figure 5 It is a partial sectional view of the buffer part of the present invention; Figure 6 It is a schematic structural diagram of the air blocking part of the present invention; Figure 7 It is a partial structural diagram of the air blocking part of the present invention; Figure 8 It is a partial sectional view of the guiding part of the present invention; Figure 9 It is a schematic structural diagram of the limiting part of the present invention; Figure 10 It is a partial sectional view of the limiting part of the present invention; Figure 11 It is a schematic structural diagram of the release part of the present invention; Figure 12 It is a schematic structural diagram of the ring main unit body of the present invention.

[0019] In the figure: 1. mounting plate; 2. air outlet component; 21. first air outlet pipe; 22. second air outlet pipe; 23. arc connecting plate; 24. protective ring; 3. elbow pipe; 4. buffer component; 41. third air outlet pipe; 42. air outlet cover; 43. air dispersion hole; 44. spiral blade; 5. air storage cylinder; 7. air blocking component; 71. servo motor; 72. lead screw; 73. first slide plate; 74. threaded hole; 75. second slide plate; 76. baffle plate; 77. card slot; 78. pressure relief spring; 79. guiding component; 791. connecting block; 792. plate sleeve; 793. rotating rod; 794. roller; 795. reset spring; 8. limiting component; 81. slider sleeve; 82. slider; 83. clamping block; 84. push rod; 85. push block; 86. retaining piece; 87. buffer spring; 9. releasing component; 91. cylinder; 92. telescopic rod; 93. extrusion block; 10. pressure sensor; 11. cabinet body; 12. cabinet door; 13. observation window; 14. control panel; 15. mounting hole. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0021] The first embodiment is as Figure 1 and Figure 12 shown. The present invention provides a technical solution: a ring main unit, including a cabinet body 11 and a cabinet door 12 rotatably installed on the surface of the cabinet body 11. An observation window 13 and a control panel 14 are fixedly installed on the surface of the cabinet door 12. An installation hole 15 is provided on the side surface of the cabinet body 11. The mounting plate 1 is fixedly connected to the cabinet body 11, and the mounting plate 1 is arranged on the outer side of the installation hole 15.

[0022] The second embodiment is as Figures 1 to 8 shown. The present invention provides a technical solution: a pressure relief device for a ring main unit, including: Installation plate 1, on the surface of the installation plate 1, an air outlet component 2 is fixedly installed. The air outlet component 2 includes a first air outlet pipe 21 and a second air outlet pipe 22. The first air outlet pipe 21 is fixedly installed on the surface of the installation plate 1, penetrates through the installation plate 1 and extends to its outside. An arc-shaped connecting plate 23 is fixedly installed between the first air outlet pipe 21 and the second air outlet pipe 22. Protective rings 24 are fixedly installed on the opposite surfaces of the first air outlet pipe 21 and the second air outlet pipe 22. A baffle 76 is slidably installed between the protective rings 24. The baffle 76 is in extrusion fit with the arc-shaped connecting plate 23. The protective rings 24 provide a sliding track for the baffle 76, and the arc-shaped connecting plate 23 limits the movement range of the baffle 76 to ensure the accuracy of its sealing and opening actions. The arc-shaped connecting plate 23 and the protective rings 24 ensure that the baffle 76 can effectively block gas under normal conditions and can be smoothly opened during pressure relief; The bottom of the air outlet component 2 is fixedly connected to a gas storage cylinder 5. When the gas inside the ring main unit is quickly discharged, the gas storage cylinder 5 can temporarily store part of the gas to buffer the discharge speed and pressure of the gas. The air outlet end of the air outlet component 2 is fixedly connected to an elbow pipe 3. The elbow pipe 3 is used to change the gas flow direction so that the gas can smoothly enter the subsequent treatment. A buffer component 4 is fixedly installed on the top of the elbow pipe 3. The buffer component 4 buffers the discharged high-pressure gas to prevent it from impacting and damaging the surrounding equipment and environment. A pressure sensor 10 is fixedly installed on the surface of the installation plate 1. The pressure sensor 10 is used to monitor the gas pressure inside the cabinet body 11 of the ring main unit in real time; The buffer component 4 includes a third air outlet pipe 41. The third air outlet pipe 41 is fixedly connected to the air outlet end of the elbow pipe 3. The third air outlet pipe 41 continues to guide the gas passing through the elbow pipe 3 upward. The top of the third air outlet pipe 41 is fixedly connected to an air outlet cover 42. A dispersion hole 43 is opened at the top of the air outlet cover 42. A spiral blade 44 is fixedly installed on the inner wall of the third air outlet pipe 41 and the air outlet cover 42. The spiral blade 44 makes the gas generate a spiral movement during the flow process, increasing the contact area and contact time between the gas and the inner wall, further reducing the gas flow rate, and enhancing the buffer effect; The air outlet cover 42 is specifically a flared structure with a wider top and a narrower bottom. The dispersion holes 43 are evenly distributed at the top of the air outlet cover 42. After the gas enters the air outlet cover 42, due to its flared structure, the gas flow rate decreases and is discharged through the dispersion holes 43, effectively reducing the impact force and noise when the gas is discharged, and protecting the safety of the surrounding equipment and personnel; A gas blocking component 7 is installed on the surface of the installation plate 1. The gas blocking component 7 is arranged directly below the air outlet component 2; The air baffle 7 includes a servo motor 71, a first slide plate 73 and a guide member 79. The servo motor 71 is electrically connected to the pressure sensor 10. The servo motor 71 is fixedly installed on the surface of the mounting plate 1 through a bracket. The output end of the servo motor 71 is fixedly connected to a lead screw 72. A threaded hole 74 is formed in the middle of the first slide plate 73. The first slide plate 73 is in transmission connection with the lead screw 72 through the threaded hole 74. Pressure relief springs 78 are fixedly connected to both sides of the top of the first slide plate 73. The top of the pressure relief spring 78 is fixedly connected to a second slide plate 75. A baffle 76 is fixedly connected to the top of the second slide plate 75. A card slot 77 is formed in the surface of the second slide plate 75. The pressure relief spring 78 connects the first slide plate 73 and the second slide plate 75 and is in an extended state under normal conditions. When pressure relief is required, the pressure relief spring 78 releases elastic potential energy, driving the second slide plate 75 and the baffle 76 to move downward. The baffle 76 no longer blocks the gas from discharging from the air outlet member 2. The guide member 79 is installed on the surface of the mounting plate 1. The first slide plate 73 and the baffle 76 are slidably installed inside the guide member 79; The guide member 79 includes a connection block 791. The connection block 791 is fixedly installed on the surface of the mounting plate 1. A plate sleeve 792 is fixedly installed on the outer surface of the connection block 791. The plate sleeve 792 provides a guiding space for the sliding of the second slide plate 75 and the baffle 76, ensuring their linearity and stability during the up and down movement. On both sides of the inner wall of the plate sleeve 792, a rotating rod 793 is rotatably installed through a rotating shaft. The other end of the rotating rod 793 is rotatably installed through a rotating shaft with a roller 794. A return spring 795 is fixedly connected between both sides of the rotating rod 793 near the roller 794 and the inner wall of the plate sleeve 792; The second slide plate 75 and the baffle 76 are slidably installed inside the plate sleeve 792. The roller 794 is in extrusion fit with the second slide plate 75 and the baffle 76. When the second slide plate 75 and the baffle 76 slide up and down, the roller 794 plays a role in reducing friction, making the sliding process smoother. At the same time, the return springs 795 on both sides of the rotating rod 793 can keep the roller 794 in contact with the second slide plate 75 and the baffle 76 all the time, enhancing the guiding effect; The limiting member 8 is disposed through the surface of the mounting plate 1. The air baffle 7 is disposed directly below the air outlet member 2; The releasing member 9 is installed on the surface of the mounting plate 1. The releasing member 9 is disposed on the same side as the pressure sensor 10.

[0023] The third embodiment, on the basis of the first embodiment, please refer to Figures 9 to 11As shown in the figure, the limiting member 8 includes a slider sleeve 81. The slider sleeve 81 is fixedly installed on the surface of the mounting plate 1. The slider sleeve 81 penetrates through the mounting plate 1 and extends to its outside. A slider 82 is slidably installed inside the slider sleeve 81. A clamping block 83 is fixedly installed on the surface of the slider 82. The clamping block 83 is engaged and adapted with the clamping groove 77. On both sides of the inner wall of the slider sleeve 81, retaining pieces 86 are fixedly installed. On the side of the slider 82 away from the clamping block 83, a push rod 84 is fixedly connected. At the other end of the push rod 84, a push block 85 is fixedly connected. A buffer spring 87 is fixedly connected between the push block 85 and the retaining piece 86. Under normal circumstances, the buffer spring 87 is in a compressed state. The buffer spring 87 is arranged on the outer surface of the push rod 84. The slider 82 slides inside the slider sleeve 81. By moving the slider 82, the engagement and separation of the clamping block 83 with the clamping groove 77 of the second slide plate 75 are controlled, so as to realize the limitation and unlocking of the second slide plate 75 and the baffle 76. The releasing member 9 includes a cylinder 91. The cylinder 91 is fixedly installed on the surface of the mounting plate 1. The telescopic end of the cylinder 91 is fixedly connected with a telescopic rod 92. The top of the telescopic rod 92 is fixedly connected with a pressing block 93. The pressing block 93 is in pressing fit with the push block 85. When the telescopic end of the cylinder 91 contracts, the pressing block 93 moves downward away from the push block 85. The push block 85 moves horizontally in the direction of the pressing block 93 under the elastic force of the buffer spring 87. The push block 85 drives the push rod 84 to pull the slider 82 to slide inside the slider sleeve 81. The slider 82 drives the clamping block 83 to disengage from the clamping groove 77 of the second slide plate 75, releasing the limitation of the second slide plate 75 and the baffle 76, thereby starting the pressure relief process.

[0024] During use, the pressure sensor 10 monitors the gas pressure inside the ring main unit cabinet 11 in real time. The servo motor 71 is not started, and the lead screw 72 is in the initial position. The first slide plate 73 is located at a higher position under the support of the pressure relief spring 78. The second slide plate 75 and the baffle 76 are also at a higher position. The baffle 76 is tightly pressed against the arc-shaped connecting plate 23, completely closing the channel between the first air outlet pipe 21 and the second air outlet pipe 22, and preventing gas from being discharged from the air outlet member 2. Under the action of the buffer spring 87, the slider 82 inside the slider sleeve 81 makes the clamping block 83 snap into the clamping groove 77 on the surface of the second slide plate 75, restricting the downward movement of the second slide plate 75 and the baffle 76. When the pressure sensor 10 monitors that the gas pressure inside the cabinet 11 exceeds the set threshold, it transmits a signal to the control panel 14. The control panel 14 controls the release member 9 to act. The telescopic end of the air cylinder 91 contracts, driving the telescopic rod 92 and the extrusion block 93 to move downward. The extrusion block 93 moves downward and disengages from the push block 85. The push block 85 moves horizontally in the direction of the extrusion block 93 under the elastic force of the buffer spring 87. The push block 85 drives the push rod 84 to pull the slider 82 to slide within the slider sleeve 81. The slider 82 drives the latch 83 to disengage from the card slot 77 of the second slide plate 75, releasing the limit on the second slide plate 75 and the baffle 76. The second slide plate 75 and the baffle 76 quickly move downward under the elastic force of the pressure relief spring 78. At this time, the second slide plate 75 and the baffle 76 slide downward within the plate sleeve 792. The roller 794 is always in pressing contact with the second slide plate 75 or the baffle 76 under the action of the return spring 795, playing a role in guiding and reducing friction. As the baffle 76 moves downward, the passage between the first air outlet pipe 21 and the second air outlet pipe 22 opens. The gas is discharged from the air outlet member 2. The gas sequentially passes through the first air outlet pipe 21 and the second air outlet pipe 22 and enters the elbow pipe 3, and then enters the buffer member 4. The gas enters the third air outlet pipe 41 and generates a spiral motion under the action of the spiral blade 44, increasing the contact area with the inner wall and reducing the flow rate. The gas then enters the air outlet cover 42. Due to the flared structure of the air outlet cover 42 that is wider at the top and narrower at the bottom, the gas further decelerates and is evenly dispersed, and finally is discharged through the evenly distributed air outlet holes 43 at the top. Part of the gas enters the air storage cylinder 5 for temporary storage, playing a buffering role to avoid the impact caused by the instantaneous large amount of gas discharge. When the gas pressure inside the cabinet body 11 drops to the set normal range, the pressure sensor 10 transmits a signal to the control panel 14. The control panel 14 controls the servo motor 71 to start, and the lead screw 72 rotates. Through the cooperation with the threaded hole 74 of the first slide plate 73, the first slide plate 73 is driven to move upward. When the first slide plate 73 moves upward, it pushes the second slide plate 75 and the baffle 76 to move upward. When the second slide plate 75 moves upward to a certain position, the slider 82 makes the latch 83 re-engage into the card slot 77 under the action of the buffer spring 87, the air outlet channel is closed, and it returns to the normal state. At this time, the release member 9 also returns to the initial state.

[0025] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ring main unit pressure relief device, characterized in that: include: A mounting plate (1), a gas outlet member (2) being fixedly mounted on the surface of the mounting plate (1), a gas storage cylinder (5) being fixedly connected to the bottom of the gas outlet member (2), a curved pipe (3) being fixedly connected to the gas outlet end of the gas outlet member (2), a buffer member (4) being fixedly mounted on one end of the curved pipe (3) away from the gas outlet member (2), and a pressure sensor (10) being fixedly mounted on the surface of the mounting plate (1); An air baffle (7), the air baffle (7) being mounted on the surface of the mounting plate (1), and the air baffle (7) being arranged directly below the air outlet member (2); A limiting member (8), the limiting member (8) being arranged through the surface of the mounting plate (1), the limiting member (8) being snap-fitted with the air blocking member (7); A release member (9), the release member (9) being mounted on a surface of the mounting plate (1), the release member (9) being arranged on the same side as the pressure sensor (10); The air baffle (7) comprises a servo motor (71), a slide plate (73) and a guide member (79), wherein the servo motor (71) is electrically connected to the pressure sensor (10), the servo motor (71) is fixedly mounted on the surface of the mounting plate (1) via a bracket, the output end of the servo motor (71) is fixedly connected to a screw rod (72), a threaded hole (74) is provided in the middle of the slide plate (73), the slide plate (73) is transmission-connected to the screw rod (72) via the threaded hole (74), pressure relief springs (78) are fixedly connected to the two sides of the top of the slide plate (73), the top of the pressure relief spring (78) is fixedly connected to the slide plate (75), the top of the slide plate (75) is fixedly connected to a baffle (76), a slot (77) is provided on the surface of the slide plate (75), the guide member (79) is mounted on the surface of the mounting plate (1), and the slide plate (73) and the baffle (76) are slidably mounted inside the guide member (79).

2. A ring main unit pressure relief device according to claim 1, characterized in that: The air outlet member (2) comprises an air outlet pipe 1 (21) and an air outlet pipe 2 (22), wherein the air outlet pipe 1 (21) is fixedly mounted on the surface of the mounting plate (1), the air outlet pipe 1 (21) penetrates the mounting plate (1) and extends to the outside thereof, an arc-shaped connecting plate (23) is fixedly mounted between the air outlet pipe 1 (21) and the air outlet pipe 2 (22), protective rings (24) are fixedly mounted on the opposite surfaces of the air outlet pipe 1 (21) and the air outlet pipe 2 (22), the baffle plate (76) is slidably mounted between the protective rings (24), and the baffle plate (76) is extruded and adapted to the arc-shaped connecting plate (23).

3. A ring main unit pressure relief device according to claim 1, characterized in that: The buffer member (4) comprises an air outlet pipe (41) which is fixedly connected to the air outlet end of the bent pipe (3); an air outlet cover (42) is fixedly connected to the top of the air outlet pipe (41); air diffusion holes (43) are provided on the top of the air outlet cover (42); spiral blades (44) are fixedly mounted on the inner walls of the air outlet pipe (41) and the air outlet cover (42).

4. A ring main unit pressure relief device according to claim 3, characterized in that: The air outlet hood (42) is specifically a trumpet-shaped structure that is wide at the top and narrow at the bottom, and the air diffusion holes (43) are evenly distributed on the top of the air outlet hood (42).

5. The ring main unit pressure relief device according to claim 1, characterized in that: The guide member (79) comprises a connecting block (791), the connecting block (791) being fixedly mounted on the surface of the mounting plate (1), a plate sleeve (792) being fixedly mounted on the outer surface of the connecting block (791), a rotating rod (793) being rotatably mounted on both sides of the inner wall of the plate sleeve (792) via a rotating shaft, and a roller (794) being rotatably mounted on the other end of the rotating rod (793) via a rotating shaft.

6. A ring main unit pressure relief device according to claim 5, characterized in that: A return spring (795) is fixedly connected between the two sides of the rotating rod (793) near one end of the roller (794) and the inner wall of the plate sleeve (792); the second slide plate (75) and the baffle plate (76) are slidably mounted inside the plate sleeve (792); and the roller (794) is extruded and adapted to the second slide plate (75) and the baffle plate (76).

7. The ring main unit pressure relief device according to claim 1, characterized in that: The limiting member (8) comprises a slider sleeve (81), the slider sleeve (81) being fixedly mounted on the surface of the mounting plate (1), the slider sleeve (81) penetrating the mounting plate (1) and extending to the outside thereof, a slider (82) being slidably mounted inside the slider sleeve (81), a clamping block (83) being fixedly mounted on the surface of the slider (82), the clamping block (83) being clamped and adapted to the clamping groove (77), baffles (86) being fixedly mounted on both sides of the inner wall of the slider sleeve (81), a push rod (84) being fixedly connected to one side of the slider (82) away from the clamping block (83), a push block (85) being fixedly connected to the other end of the push rod (84), a buffer spring (87) being fixedly connected between the push block (85) and the baffle (86), and the buffer spring (87) being arranged on the outer surface of the push rod (84).

8. The ring main unit pressure relief device according to claim 1, characterized in that: The release member (9) comprises a cylinder (91), the cylinder (91) being fixedly mounted on the surface of the mounting plate (1), the telescopic end of the cylinder (91) being fixedly connected to a telescopic rod (92), the top of the telescopic rod (92) being fixedly connected to an extrusion block (93), the extrusion block (93) being extruded and adapted to the push block (85).

9. A ring main unit, characterized in that: The cabinet comprises a cabinet body (11), and a cabinet door (12) rotatably mounted on the surface of the cabinet body (11); an observation window (13) and a control panel (14) are fixedly mounted on the surface of the cabinet door (12); a mounting hole (15) is provided on the side of the cabinet body (11); the mounting hole (15) is used for connecting a pressure relief device.

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