A switch cabinet of an environment-friendly gas filling and recycling integrated device

Abstract

The utility model belongs to the technical field of switch cabinet, concretely relates to a switch cabinet of environmental protection gas fills and recycling integrated device, including switch cabinet cabinet body and cabinet door, the inside fixed connection of switch cabinet cabinet body has backplate, and the front side of every backplate all is provided with installation station, and the inner wall of cabinet door is installed with telescopic seal cover, and the switch cabinet still includes environmental protection gas fills and recycling integrated equipment, and environmental protection gas fills and recycling integrated equipment and telescopic seal cover are linked together. The utility model sets up the telescopic seal cover of cover installation station outside through the setting, and recycling and reusing the environmental protection gas in the telescopic seal cover by using environmental protection gas fills and recycling integrated equipment, can greatly reduce the space that needs to fill environmental protection gas in the switch cabinet, is protected while using environmental protection gas to the electrical element in the switch cabinet, greatly reduces the consumption of environmental protection gas.

Description

Technical Field

[0001] This utility model belongs to the field of switch cabinet technology, specifically relating to a switch cabinet with an integrated environmentally friendly gas filling and recovery device. Background Technology

[0002] In power systems, switchgear is a core device ensuring the safety of power transmission and distribution. The operating environment of its internal electrical components (such as circuit breakers, disconnectors, and instrument transformers) directly affects the stability of the overall power system. To prevent damage to electrical components due to moisture, dust, or arc discharge, traditional switchgear typically uses insulating gases (such as sulfur hexafluoride, SF6) for insulation and arc extinguishing protection.

[0003] However, traditional switchgear has significant drawbacks: First, to ensure all internal electrical components are in a protected environment, the entire internal space of the cabinet must be filled with gas, resulting in extremely high consumption of insulating gas. For example, a single traditional medium-voltage switchgear unit can contain tens of kilograms of sulfur hexafluoride (SF6), significantly increasing operating costs. Furthermore, SF6 is a strong greenhouse gas (its Global Warming Potential (GWP) is approximately 23,900 times that of carbon dioxide, and it has an atmospheric lifetime of up to 3,200 years), posing a serious threat to the ecological environment with its large-scale use. Second, traditional switchgear lacks an effective gas recovery mechanism. When the cabinet door needs to be opened for maintenance, much of the internal insulating gas is directly released into the atmosphere, wasting resources and exacerbating the environmental burden.

[0004] With the advancement of the "dual carbon" target and increasingly stringent environmental regulations, the problems of high gas consumption, high emissions, and poor sealing of traditional switchgear have become more and more prominent. The industry urgently needs a new switchgear technology that can reduce gas consumption and realize gas recycling in order to balance the safe operation of power equipment with the needs of environmental protection and energy conservation. Utility Model Content

[0005] The purpose of this invention is to provide a switch cabinet with an integrated device for filling and recycling environmentally friendly gas, which can greatly reduce the consumption of environmentally friendly gas while protecting the electrical components inside the switch cabinet using environmentally friendly gas.

[0006] The specific technical solution adopted by this utility model is as follows: A switch cabinet for an integrated environmental gas filling and recycling device includes a switch cabinet body and a cabinet door. At least one back panel is fixedly connected inside the switch cabinet body, and at least one installation station is provided on the front side of each back panel. The inner wall of the cabinet door is equipped with telescopic sealing covers, the same number as the number of installation stations. After the cabinet door is closed, the telescopic sealing covers can extend towards the back panel. The switch cabinet also includes an integrated environmental gas filling and recycling device, which is connected to a telescopic sealing cover.

[0007] Furthermore, the integrated environmental gas filling and recycling equipment includes a gas storage container fixedly connected to the outside of the switch cabinet. An injection pump is fixedly connected to the upper end of the gas storage container, and the gas storage container and the injection pump are connected. The injection pump is connected to an inlet solenoid valve through a short pipe. The inlet solenoid valve is fixedly connected to the outside of the switch cabinet and is connected to a telescopic sealing cover through an inlet pipe. A suction pump and a recycling channel solenoid valve are fixedly connected to the lower side of the gas storage container. The recycling channel solenoid valve is connected to the lower part of the gas storage container. The suction pump and the recycling channel solenoid valve are connected. The suction pump and the telescopic sealing cover are connected through an outlet pipe. The suction pump is connected to a three-way pipe. One end of the three-way pipe is connected to the recycling channel solenoid valve, and the other end of the three-way pipe is connected to a discharge channel solenoid valve. A filter is fixedly connected inside the gas storage container.

[0008] Furthermore, the telescopic sealing cover includes a fixed base fixedly connected to the cabinet door, a first linear telescopic moving mechanism fixedly connected to the fixed base, a top frame mounted on the first linear telescopic moving mechanism, the first linear telescopic moving mechanism being used to adjust the distance between the top frame and the fixed base, a telescopic enclosure sealing cover being installed between the top frame and the fixed base, and an air guide cavity communicating with the telescopic enclosure sealing cover being opened inside the fixed base, and both the air inlet pipe and the air outlet pipe being connected to the air guide cavity of the fixed base.

[0009] Furthermore, an additional housing is fixedly connected to the cabinet door, a movable base plate is horizontally slidably connected inside the additional housing, the fixed seat is fixedly connected to the movable base plate, and a second linear telescopic movement mechanism that is pulsatorically connected to the movable base plate is installed inside the additional housing. The second linear telescopic movement mechanism includes an electromagnet, a magnetic plate, and a return spring. The electromagnet is fixedly connected to the inner side of the auxiliary housing, the magnetic plate is fixedly connected to the movable base plate, and the return spring is fixedly connected between the movable base plate and the auxiliary housing.

[0010] Furthermore, a wire-passing hole is provided at the installation station, and a sealing mechanism opposite to the wire-passing hole is fixedly connected to the rear side of the back plate. The sealing mechanism includes a threaded inner ring fixedly connected to the rear side of the back plate, and multiple arc-shaped clamping strips are fixedly connected to the rear side of the threaded inner ring. The multiple arc-shaped clamping strips are arranged in a circular array with the axis of the threaded inner ring as the center. A rubber sealing block is fixedly connected to the inner side of each of the multiple arc-shaped clamping strips. A threaded outer ring is threadedly connected to the outer side of the threaded inner ring, and an annular ring is fixedly connected to the rear end of the inner side of the threaded outer ring. A pressure inclined surface is provided on the inner side of the annular ring.

[0011] The technical effects achieved by this utility model are as follows: This utility model discloses a switch cabinet with an integrated environmentally friendly gas filling and recycling device. By setting a telescopic sealing cover outside the installation position, and using the integrated environmentally friendly gas filling and recycling device to recycle and reuse the environmentally friendly gas inside the telescopic sealing cover, the space required to fill the switch cabinet with environmentally friendly gas can be greatly reduced. While using environmentally friendly gas to protect the electrical components inside the switch cabinet, the consumption of environmentally friendly gas is greatly reduced. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the switch cabinet body of this utility model; Figure 3 This is a utility model Figure 2 Schematic diagram of the cross-sectional structure at point A in the middle; Figure 4 This is a schematic diagram of the overall cross-sectional structure of this utility model; Figure 5 This is a cross-sectional structural diagram of the switch cabinet and gas storage container assembly of this utility model; Figure 6 This is a utility model Figure 5 A magnified view of a section at point B in the middle; Figure 7 This is a cross-sectional structural diagram from another perspective of this utility model.

[0013] The attached diagram lists the components represented by each number as follows: 1. Switch cabinet body; 2. Cabinet door; 3. Gas storage container; 4. Injection pump; 5. Inlet solenoid valve; 6. Inlet pipe; 7. Outlet pipe; 8. Suction pump; 9. T-connector; 10. Short pipe; 11. Recovery channel solenoid valve; 12. Discharge channel solenoid valve; 13. Filter body; 14. Additional housing; 15. Pull-out rod; 16. Back panel; 17. Installation station; 18. Wiring hole; 19. Fixing base; 20. Telescopic enclosure sealing cover; 21. Top frame; 22. Electric telescopic rod; 23. Connecting air pipe; 24. Movable base plate; 25. Electromagnet; 26. Magnetic plate; 27. Return spring; 28. Threaded inner ring; 29. ​​Arc-shaped clamping strip; 30. Rubber sealing block; 31. Threaded outer ring; 32. Annular ring; 33. Pressure ramp. Detailed Implementation

[0014] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0015] like Figures 1-7 As shown, a switch cabinet for an integrated environmental gas filling and recycling device includes a switch cabinet body 1 and a cabinet door 2. One side of the switch cabinet body 1 and one side of the cabinet door 2 are hinged together by a hinge or a pivot. The other side of the switch cabinet body 1 and the cabinet door 2 are connected together by a lock. This part is a mature existing technology, and this technical solution will not describe it in detail. The switch cabinet 1 has at least one back plate 16 fixedly connected inside. Each back plate 16 has at least one installation station 17 on its front side. The installation station 17 is an area for installing electrical components. The core electrical components inside the switch cabinet, such as circuit breakers, disconnect switches, current transformers, and voltage transformers, can be fixed to the preset installation holes of the installation station 17 by bolts.

[0016] The inner wall of cabinet door 2 is equipped with the same number of telescopic sealing covers as installation station 17. After cabinet door 2 is closed, the telescopic sealing cover can extend towards the back panel 16 until the end of the telescopic sealing cover abuts against the front side of the back panel 16. At this time, the telescopic sealing cover covers the outside of installation station 17, forming a sealed space outside installation station 17. The switchgear also includes an integrated environmental gas filling and recovery device. The integrated environmental gas filling and recovery device is preferably installed on the outside of the switchgear cabinet 1. The integrated environmental gas filling and recovery device is connected to the telescopic sealing cover. When there are multiple telescopic sealing covers, multiple telescopic sealing covers can be connected in series with the integrated environmental gas filling and recovery device, or multiple telescopic sealing covers can be connected in parallel with the integrated environmental gas filling and recovery device. When the telescopic sealing cover is outside the installation station 17, the integrated environmental gas filling and recovery equipment can inject the stored environmental gas into the telescopic sealing cover to protect the electrical components inside the telescopic sealing cover. By setting the telescopic sealing cover outside the installation station 17, the space required to fill the switch cabinet with environmental gas can be greatly reduced, thereby greatly reducing the consumption of environmental gas. Here, the environmentally friendly gas can be dry air, nitrogen, or a low GWP mixture (such as C5-FK perfluoroketone gas). The environmentally friendly gas has excellent insulation properties, which can isolate electrical components from contact with air and avoid the degradation of insulation performance caused by moisture and dust. At the same time, when an electric arc discharge occurs in the electrical components, the gas can quickly cool the arc and extinguish the discharge, reducing the phenomenon of component burnout.

[0017] When cabinet door 2 needs to be opened, the environmentally friendly gas inside the telescopic sealing cover is recovered by the integrated environmentally friendly gas filling and recovery equipment installed on the outside of the switch cabinet body 1. After the cabinet door 2 is closed again, the environmentally friendly gas is injected into the telescopic sealing cover again, thereby further reducing the consumption of environmentally friendly gas.

[0018] After the environmentally friendly gas inside the telescopic sealing cover is recovered, the telescopic sealing cover can be contracted, so that the telescopic sealing cover and the electrical components on the installation station 17 are intertwined. At this time, during the process of opening the cabinet door 2, the telescopic sealing cover will not come into contact with the electrical components, making it convenient to open the cabinet door 2.

[0019] like Figure 1 , Figures 4-6 As shown, the integrated environmental gas filling and recovery equipment includes a gas storage container 3 fixedly connected to the outside of the switch cabinet 1. An injection pump 4 is fixedly connected to the upper end of the gas storage container 3, and the gas storage container 3 and the injection pump 4 are connected. The injection pump 4 is connected to an inlet solenoid valve 5 via a short pipe 10. The inlet solenoid valve 5 is fixedly connected to the outside of the switch cabinet 1 and is connected to a telescopic sealing cover via an inlet pipe 6. When the inlet solenoid valve 5 is opened, the environmental gas inside the gas storage container 3 can be injected into the telescopic sealing cover through the injection pump 4. A suction pump 8 and a recovery channel solenoid valve 11 are fixedly connected to the lower side of the gas storage container 3. The recovery channel solenoid valve 11 is connected to the lower part of the gas storage container 3. The air pump 8 is connected to a three-way pipe 9. One end of the three-way pipe 9 is connected to the recovery channel solenoid valve 11, and the other end of the three-way pipe 9 is connected to the discharge channel solenoid valve 12. The air pump 8 and the telescopic sealing cover are connected through the air outlet pipe 7. When the recovery channel solenoid valve 11 is opened, the inlet solenoid valve 5 and the discharge channel solenoid valve 12 are closed. Then, the air pump 8 is started to recover the environmentally friendly gas inside the telescopic sealing cover and enter the lower end of the gas storage container 3. When the telescopic sealing cover and the back plate 16 are in contact, the discharge channel solenoid valve 12 can be opened, the inlet solenoid valve 5 and the recovery channel solenoid valve 11 can be closed, and the air pump 8 can be started again. The air inside the telescopic sealing cover can be discharged through the discharge channel solenoid valve 12.

[0020] Meanwhile, a filter body 13 can be fixedly connected inside the gas storage container 3. When the gas flowing into the lower end of the gas storage container 3 is recovered by the solenoid valve 11 of the recovery channel and flows into the injection pump 4, the environmentally friendly gas needs to be filtered through the filter body 13. The filter body 13 is made of at least one of activated carbon and glass fiber. Activated carbon can adsorb impurities such as moisture and oil mixed in the recovered gas, while glass fiber can filter out tiny dust particles. This ensures the purity of the environmentally friendly gas recovered into the gas storage container 3, reduces impurities adhering to the surface of electrical components or clogging the gas passage, and extends the service life of the gas and the maintenance cycle of the equipment.

[0021] like Figures 4-5As shown, the telescopic sealing cover includes a fixed base 19 fixedly connected to the cabinet door 2. A first linear telescopic moving mechanism is fixedly connected to the fixed base 19. A top frame 21 is installed on the first linear telescopic moving mechanism. The first linear telescopic moving mechanism is used to adjust the distance between the top frame 21 and the fixed base 19. A telescopic enclosure sealing cover 20 is installed between the top frame 21 and the fixed base 19. By adjusting the position of the top frame 21, the telescopic enclosure sealing cover 20 can be extended or retracted. The telescopic enclosure sealing cover 20 can be a telescopic flexible bellows protective cover or a corrugated tube sealing cover made of polytetrafluoroethylene (PTFE) material, which has good telescopic performance and sealing effect.

[0022] The fixed base 19 has an air guide cavity that communicates with the retractable enclosure sealing cover 20. The air inlet pipe 6 and the air outlet pipe 7 are both connected to the air guide cavity of the fixed base 19, thereby controlling the air intake or exhaust inside the retractable enclosure sealing cover 20.

[0023] It should be noted that when there are multiple telescopic sealing covers, the fixing seats 19 of the multiple telescopic sealing covers can be connected in sequence through the connecting air pipe 23, and the two fixing seats 19 located at the beginning and end are respectively connected to the air inlet pipe 6 and the air outlet pipe 7.

[0024] If each workstation needs to independently control gas filling and releasing, a parallel connection method is adopted, with each telescopic sealing cover individually connected to the inlet pipe 6 and the outlet pipe 7, improving operational flexibility.

[0025] like Figures 4-5 As shown, in some embodiments, the first linear telescopic movement mechanism is an electric telescopic rod 22 fixedly connected to the outside of the fixed base 19. The piston rod of the electric telescopic rod 22 is fixedly connected to the top frame 21. In this case, the top frame 21 and the telescopic enclosure sealing cover 20 can be moved relatively easily by starting the electric telescopic rod 22.

[0026] Meanwhile, a sealing ring can be fixedly connected to the end face of the top frame 21 to ensure the sealing between the top frame 21 and the back plate 16.

[0027] like Figure 1 , Figure 4 and Figure 7 As shown, in some further embodiments, an additional housing 14 may be fixedly connected to the cabinet door 2. A movable base plate 24 is horizontally slidably connected inside the additional housing 14. A fixed seat 19 is fixedly connected to the movable base plate 24. A second linear telescopic movement mechanism that is pulsatorically connected to the movable base plate 24 is installed inside the additional housing 14. The movable base plate 24 can be driven to slide horizontally inside the additional housing 14 through the second linear telescopic movement mechanism.

[0028] Specifically, a second linear telescopic moving mechanism is disclosed herein. The second linear telescopic moving mechanism includes an electromagnet 25, a magnetic plate 26, and a return spring 27. The electromagnet 25 is fixedly connected to the inner side of the auxiliary housing 14, the magnetic plate 26 is fixedly connected to the movable base plate 24, and the return spring 27 is fixedly connected between the movable base plate 24 and the auxiliary housing 14. The magnetic plate 26 is preferably made of iron. When the electromagnet 25 is energized, it can apply a pulling force to the magnetic plate 26, causing the movable base plate 24 to retract. When the movable base plate 24 retracts, it will cause multiple telescopic enclosure sealing covers 20 to move as a whole away from the back plate 16. When the electromagnet 25 is de-energized, the return spring 27 can apply a pushing force to the movable base plate 24, causing multiple telescopic enclosure sealing covers 20 to move as a whole towards the back plate 16. Thus, when opening and closing the cabinet door 2, the multiple telescopic enclosure sealing covers 20 can be adjusted relatively easily.

[0029] The second linear telescopic movement mechanism can also be replaced by an electric push rod. Compared with the electric push rod, the second linear telescopic movement mechanism composed of electromagnet 25, magnetic plate 26 and return spring 27 has a smaller thickness.

[0030] Meanwhile, a pull rod 15 is fixedly connected to the movable base plate 24. The pull rod 15 is slidably connected to the cabinet door 2. When the power is off, the movable base plate 24 and multiple retractable enclosure sealing covers 20 can be moved as a whole by pulling the pull rod 15.

[0031] like Figures 2-3 As shown, in some other embodiments, the installation station 17 is provided with a wire hole 18, through which the wires connecting the electrical components on the installation station 17 extend to the rear side of the back plate 16, thereby reducing the impact of the wires on the sealing between the back plate 16 and the top frame 21.

[0032] like Figures 2-3As shown, a sealing mechanism is fixedly connected to the rear side of the back plate 16, opposite to the wire hole 18. The sealing mechanism includes a threaded inner ring 28 fixedly connected to the rear side of the back plate 16. Multiple arc-shaped clamping strips 29 are fixedly connected to the rear side of the threaded inner ring 28. The multiple arc-shaped clamping strips 29 are arranged in a circular array with the axis of the threaded inner ring 28 as the center. Rubber sealing blocks 30 are fixedly connected to the inner side of each of the multiple arc-shaped clamping strips 29. A threaded outer ring 31 is threadedly connected to the outer side of the threaded inner ring 28. The rear side of the threaded outer ring 31 is... An annular ring 32 is fixedly connected to the end. A pressure inclined surface 33 is provided on the inner side of the annular ring 32. When the threaded outer ring 31 rotates outside the threaded inner ring 28, it will move back and forth along the axis of the threaded inner ring 28. When the threaded outer ring 31 drives the annular ring 32 to move forward, it will apply inward pressure to the arc-shaped clamping strip 29, causing multiple rubber sealing blocks 30 to squeeze each other and multiple rubber sealing blocks 30 to squeeze the wire, filling the gap between the threaded outer ring 31 and the wire, and ensuring the sealing performance.

[0033] Meanwhile, a sealing ring can be fixedly connected between the wire hole 18 and the wire to ensure airtightness.

[0034] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. An environmentally friendly gas filling and recycling integrated device switch cabinet, characterized in that: It includes a switch cabinet body (1) and a cabinet door (2). The switch cabinet body (1) is fixedly connected to at least one back panel (16), and each back panel (16) has at least one installation station (17) on its front side. The inner wall of the cabinet door (2) is equipped with the same number of telescopic sealing covers as the installation stations (17); The switch cabinet also includes an integrated environmental gas filling and recycling device, which is connected to a telescopic sealing cover.

2. The switch cabinet of claim 1, wherein: The integrated environmental gas filling and recycling equipment includes a gas storage container (3) fixedly connected to the outside of the switch cabinet (1). An injection pump (4) is fixedly connected to the upper end of the gas storage container (3). The gas storage container (3) and the injection pump (4) are connected. The injection pump (4) is connected to an intake solenoid valve (5) through a short pipe (10). The intake solenoid valve (5) is fixedly connected to the outside of the switch cabinet (1). The intake solenoid valve (5) is connected to a telescopic sealing cover through an intake pipe (6). An exhaust pump (8) and a recycling channel solenoid valve (11) are fixedly connected to the lower side of the gas storage container (3). The recycling channel solenoid valve (11) is connected to the lower part of the gas storage container (3). The exhaust pump (8) and the recycling channel solenoid valve (11) are connected. The exhaust pump (8) and the telescopic sealing cover are connected through an outlet pipe (7).

3. The switchgear of claim 2, wherein: The air pump (8) is connected to a three-way pipe (9), one end of which is connected to a recovery channel solenoid valve (11), and the other end of which is connected to a discharge channel solenoid valve (12).

4. The switch cabinet of claim 2, wherein the switch cabinet is characterized in that: A filter (13) is fixedly connected inside the gas storage container (3).

5. The switchgear of claim 2, wherein: The telescopic sealing cover includes a fixed seat (19) fixedly connected to the cabinet door (2). A first linear telescopic moving mechanism is fixedly connected to the fixed seat (19). A top frame (21) is installed on the first linear telescopic moving mechanism. The first linear telescopic moving mechanism is used to adjust the distance between the top frame (21) and the fixed seat (19). A telescopic enclosure sealing cover (20) is installed between the top frame (21) and the fixed seat (19). An air guide cavity is opened inside the fixed seat (19) and communicates with the telescopic enclosure sealing cover (20). The air inlet pipe (6) and the air outlet pipe (7) are both connected to the air guide cavity of the fixed seat (19).

6. The switchgear of claim 5, wherein: The retractable enclosure sealing cover (20) is a retractable flexible bellows protective cover.

7. The switchgear of claim 5, wherein the switchgear is characterized in that: When there are multiple telescopic sealing covers, the fixing seats (19) of the multiple telescopic sealing covers can be connected in sequence through the connecting air pipe (23), and the two fixing seats (19) located at the beginning and end are respectively connected to the air inlet pipe (6) and the air outlet pipe (7).

8. The switchgear of claim 5, wherein: An additional housing (14) is fixedly connected to the cabinet door (2). A movable base plate (24) is horizontally slidably connected inside the additional housing (14). The fixed seat (19) is fixedly connected to the movable base plate (24). A second linear telescopic movement mechanism that is connected to the movable base plate (24) is installed inside the additional housing (14). The second linear telescopic movement mechanism includes an electromagnet (25), a magnetic plate (26), and a return spring (27). The electromagnet (25) is fixedly connected to the inner side of the additional housing (14), the magnetic plate (26) is fixedly connected to the movable base plate (24), and the return spring (27) is fixedly connected between the movable base plate (24) and the additional housing (14).

9. The switchgear of the environmentally friendly gas filling and recycling integrated device according to any one of claims 1-8, characterized in that: The installation station (17) is provided with a wire hole (18). The back plate (16) is fixedly connected to a sealing mechanism opposite to the wire hole (18). The sealing mechanism includes a threaded inner ring (28) fixedly connected to the back plate (16). Multiple arc-shaped clamps (29) are fixedly connected to the back of the threaded inner ring (28). The multiple arc-shaped clamps (29) are arranged in a ring array with the axis of the threaded inner ring (28) as the center. Rubber sealing blocks (30) are fixedly connected to the inner side of each of the multiple arc-shaped clamps (29). A threaded outer ring (31) is threadedly connected to the outer side of the threaded inner ring (28). An annular ring (32) is fixedly connected to the rear end of the inner side of the threaded outer ring (31). A pressure inclined surface (33) is provided on the inner side of the annular ring (32).

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