Environment-friendly high-pressure gas-insulated switchgear

Abstract

The utility model relates to the technical field of high-pressure gas-filled cabinets, in particular to an environment-friendly high-pressure gas-filled cabinet, which comprises a plurality of groups of cabinet bodies, the plurality of groups of cabinet bodies are assembled and matched, mounting ports are arranged on the front and the back of the cabinet bodies and used for mounting devices and gas-filled tubes in a sealed manner, exhaust ports are arranged on the cabinet bodies, and the exhaust ports are communicated with the gas-filled tubes. An explosion-proof assembly is installed on the exhaust port and comprises a first pipe body, the first pipe body is installed on the exhaust port, a second pipe body is installed at one end of the first pipe body, a first explosion-proof membrane and a second explosion-proof membrane are installed in the first pipe body and the second pipe body respectively, and the explosion pressure value of the first explosion-proof membrane is smaller than that of the second explosion-proof membrane. The explosion-proof diaphragm I and the explosion-proof diaphragm II with different explosion pressure values are arranged, so that a two-stage pressure relief mechanism is formed, instant and massive leakage of insulating gas is avoided, the gas supply cost and the environmental burden are reduced, the power failure range and the maintenance workload caused by faults are reduced, short-time operation of the high-pressure gas-filled cabinet is maintained, and the power supply continuity is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure gas filled cabinet field, concretely is environmental protection type high pressure gas filled cabinet. BACKGROUND

[0002] As the key equipment of modern electric power system, high pressure gas filled cabinet realizes the miniaturization and high reliability of equipment by sealing high voltage live parts in the cabinet filled with insulating gas, in order to ensure safety, the gas filled cabinet is usually equipped with pressure relief device, and the explosion-proof diaphragm is widely applied due to its rapid response and simple structure.

[0003] The existing gas filled cabinet adopts single diaphragm, when the pressure in the cabinet suddenly increases due to arc fault and the like, the diaphragm is completely broken at one time after reaching the set burst value, so as to realize pressure relief, for some non-disastrous transient overvoltage or slight fault, the pressure rise may not reach the dangerous limit, and the complete burst of the single diaphragm will cause a large amount of leakage of insulating gas, thereby bringing high recharging cost and environmental burden, and the complete burst also means that power supply must be stopped immediately after pressure relief to replace the diaphragm, thereby expanding the power-off range and maintenance workload caused by the fault, therefore, the environmental protection type high pressure gas filled cabinet is provided. SUMMARY

[0004] The utility model discloses a purpose in providing environmental protection type high pressure gas filled cabinet to solve the problem in the above background art.

[0005] The purpose of the utility model can be realized through the following technical scheme.

[0006] Environmental protection type high pressure gas filled cabinet, including the cabinet, the front and back of the cabinet are all set up with the installation mouth, for sealing type installation device and gas filled pipe, the cabinet is installed with the exhaust port, the exhaust port is installed with the explosion -proof subassembly, the explosion -proof subassembly includes the tubular body one, the tubular body one is installed on the exhaust port, the one end of tubular body one is installed with the tubular body two, the tubular body one and the tubular body two are installed with the explosion -proof diaphragm one and the explosion -proof diaphragm two respectively, the burst pressure value of explosion -proof diaphragm one is less than the burst pressure value of explosion -proof diaphragm two, the tubular body two is fixedly connected with the connecting port for connecting the gas guide pipe at the one end away from the tubular body one.

[0007] Preferably, the inner wall of the tubular body one is provided with an annular groove one near one end of the cabinet, the side edge of the explosion -proof diaphragm one is clamped in the annular groove one, the inner wall of the tubular body two is provided with an annular groove two near one end of the cabinet, the side edge of the explosion -proof diaphragm two is clamped in the annular groove two, and the annular groove one and the annular groove two are respectively extruded and installed with sealing pads one and two.

[0008] Preferably, the inner wall of the tubular body one is provided with an annular groove one near one end of the cabinet, the side edge of the explosion -proof diaphragm one is clamped in the annular groove one, the inner wall of the tubular body two is provided with an annular groove two near one end of the cabinet, the side edge of the explosion -proof diaphragm two is clamped in the annular groove two, and the annular groove one and the annular groove two are respectively extruded and installed with sealing pads one and two.

[0009] Preferably, a connecting ring is rotatably installed at one end of the pipe body, and both the inner wall of the connecting ring and the outer wall of the exhaust port are threaded, and the inner wall of the connecting ring and the outer wall of the exhaust port are threaded.

[0010] Preferably, the outer wall of the connecting ring is fixedly provided with protrusions, and multiple sets of protrusions are provided, with the multiple sets of protrusions being equally spaced.

[0011] Preferably, the upper ends of multiple sets of cabinets are all fixedly connected to a connecting plate, which is used to fix the upper ends of adjacent cabinets.

[0012] The beneficial effects of this utility model are:

[0013] This invention establishes a two-stage pressure relief mechanism by setting two explosion-proof diaphragms with different burst pressure values. When a minor overpressure or non-catastrophic fault occurs, only the explosion-proof diaphragm with the lower burst pressure value ruptures, providing initial pressure relief. If the pressure is controlled, the second explosion-proof diaphragm can be prevented from rupturing, thus avoiding a large-scale instantaneous leakage of insulating gas, reducing gas replenishment costs and environmental burden. This two-stage pressure relief mechanism eliminates the need for immediate replacement of the explosion-proof diaphragms after a minor fault, reducing the scope of power outages and maintenance workload, maintaining short-term operation of the high-voltage gas-filled cabinet, and improving power supply continuity. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the front structure of the cabinet of this utility model;

[0016] Figure 2 This is a schematic diagram of the rear structure of the cabinet of this utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the cabinet of this utility model;

[0018] Figure 4 yes Figure 3 Enlarged schematic diagram of the structure at point A;

[0019] The attached figures are labeled as follows:

[0020] 1. Cabinet body; 2. Connecting plate; 3. Mounting port; 4. Pipe body one; 5. Pipe body two; 6. Connecting port; 7. Connecting ring; 8. Exhaust port; 9. Annular groove one; 10. Annular groove two; 11. Sealing gasket one; 12. Sealing gasket two; 13. Explosion-proof diaphragm one; 14. Explosion-proof diaphragm two; 15. Baffle; 16. Protrusion. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Environmentally friendly high-pressure gas-filled switchgear, such as Figures 1-4 As shown, multiple sets of cabinet 1 can be set up, and multiple sets of cabinet 1 can be assembled to form an inflatable cabinet. The front and back of the cabinet 1 are provided with mounting ports 3 for sealing the installation of devices and inflation pipes (with the help of sealing components). The devices detect or control the inflatable cabinet. The inflation pipe is used to inflate the cabinet 1. An exhaust port 8 is installed on the cabinet 1. An explosion-proof component is installed on the exhaust port 8. When the gas pressure inside the inflatable cabinet increases, an explosion-proof component is installed to prevent the inflatable cabinet from exploding. The explosion-proof component allows the gas to be released, thus depressurizing the inflatable cabinet.

[0023] The explosion-proof assembly includes a tube body 4, which is sealed and installed on the exhaust port 8. A second tube body 5 is sealed and installed at one end of the tube body. Tube body 4 and tube body 5 are coaxial. An explosion-proof diaphragm 13 and an explosion-proof diaphragm 24 are respectively installed inside tube body 4 and tube body 25. The burst pressure value of explosion-proof diaphragm 13 is less than that of explosion-proof diaphragm 24. The materials of explosion-proof diaphragm 13 and explosion-proof diaphragm 24 can be austenitic stainless steel or nickel-based alloy. The shape is shown in the figure. A cross-shaped notch is opened in the middle. The notch forms the weak area of ​​the diaphragm. When the diaphragm breaks, it will unfold along the four notches to form four petals. A connection port 6 for connecting the air guide tube is fixed to the end of tube body 25 away from tube body 4.

[0024] When the gas-filled switchgear experiences a minor overpressure or non-catastrophic failure, the pressure causes the explosion-proof diaphragm 13, which has a lower burst pressure value, to rupture, thus providing initial pressure relief. If the pressure is controlled, the explosion-proof diaphragm 14 will not rupture, and the insulating gas will not leak, reducing the cost of gas replenishment and the environmental burden. After experiencing a minor failure, the equipment does not need to immediately replace the explosion-proof diaphragm, which reduces the scope of power outages and maintenance workload caused by the failure, maintains the short-term operation of the high-voltage gas-filled switchgear, and improves the continuity of power supply.

[0025] When an overpressure or catastrophic failure occurs in the gas cabinet, causing the gas pressure inside the gas cabinet to increase to a certain value, the pressure will rupture the explosion-proof diaphragm 13 and explosion-proof diaphragm 14, and enter the gas duct through the connection port 6 into the processing or collection device. The gas cabinet will release pressure in time to avoid an explosion. The gas first passes through the explosion-proof diaphragm 13 and then through the explosion-proof diaphragm 14, and the pressure is released in stages, making the pressure release process more gentle.

[0026] An annular groove 9 is provided on the inner wall of tube 4 near the end of cabinet 1. The side of explosion-proof diaphragm 13 is engaged in the annular groove 9. An annular groove 10 is provided on the inner wall of tube 5 near the end of cabinet 1. The side of explosion-proof diaphragm 14 is engaged in the annular groove 10. Sealing gasket 11 and sealing gasket 22 are respectively squeezed and installed in annular groove 9 and annular groove 10. Explosion-proof diaphragm 13 and explosion-proof diaphragm 24 are stably installed inside tube 4 and tube 5. After being sealed by sealing gasket 11 and sealing gasket 22, the gas can only be released by breaking through explosion-proof diaphragm 13 and explosion-proof diaphragm 24.

[0027] A baffle 15 is attached to one end of the tube 4 near the cabinet 1. The baffle 15 has holes and its edge is engaged in the annular groove 9. A receiving cavity is formed between the baffle 15 and the explosion-proof diaphragm 13. The receiving cavity is filled with adsorbent. The size of the adsorbent particles is larger than the size of the holes, so the adsorbent particles will not pass through the holes. The adsorbent is installed in the receiving cavity and will not occupy the internal space of the cabinet 1. The adsorbent (such as activated alumina, molecular sieve, etc., the adsorbent is existing technology) is used to adsorb acidic decomposition products and moisture. When the first-stage pressure relief occurs, the hot and potentially toxic decomposition gas must pass through the holes of the baffle 15, come into full contact with the adsorbent, be purified, and then be discharged outside the cabinet, avoiding the gas from being discharged from the cabinet 1 carrying toxicity, thus ensuring good environmental protection.

[0028] A connecting ring 7 is rotatably installed at one end of the pipe body 4. The inner wall of the connecting ring 7 and the outer wall of the exhaust port 8 are both threaded, and the inner wall of the connecting ring 7 and the outer wall of the exhaust port 8 are threaded.

[0029] The pipe body 4 is connected to the exhaust port 8 via the connecting ring 7 and threaded installation, which is convenient. A sealing element can be installed on the outer wall of the exhaust port 8 to ensure a seal between the exhaust port 8 and the pipe body 4 after installation.

[0030] The outer wall of the connecting ring 7 is fixed with a protrusion 16. There are multiple sets of protrusions 16, which are equidistant from each other. The protrusions 16 increase the friction of the outer wall of the connecting ring 7, making it easier to rotate the connecting ring 7.

[0031] The top of each of the multiple cabinets 1 is fixed with a connecting plate 2, and the tops of the multiple cabinets 1 are connected by the connecting plate 2 to increase the structural stability of the gas-filled cabinet.

[0032] The working principle of the environmentally friendly high-pressure gas-filled switchgear provided by this utility model is as follows:

[0033] By installing an adsorbent within the explosion-proof components, the depressurized gas is treated before being released, resulting in good environmental performance. Two explosion-proof diaphragms, diaphragm 13 and diaphragm 14, with different burst pressure values, form a two-stage pressure relief mechanism. In the event of a minor overpressure or non-catastrophic fault, only diaphragm 13 with the lower burst pressure value ruptures for initial pressure relief. If the pressure is controlled, diaphragm 14 can be prevented from rupturing, thus avoiding a large-scale instantaneous leakage of insulating gas, reducing replenishment costs and environmental burden. This two-stage pressure relief mechanism eliminates the need for immediate replacement of the explosion-proof diaphragms after a minor fault, minimizing the scope of power outages and maintenance workload, maintaining short-term operation of the high-voltage gas-filled cabinet, and improving power supply continuity.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An environmentally friendly high-voltage gas-insulated switchgear, comprising a cabinet (1), characterized in that, The front and back of the cabinet are provided with installation openings (3) for sealingly installing devices and air tubes, and the cabinet (1) is provided with an exhaust opening (8) having an explosion-proof assembly, which comprises a tube body one (4) installed on the exhaust opening (8), one end of the tube body one (4) being provided with a tube body two (5), the tube body one (4) and the tube body two (5) being respectively provided with an explosion-proof diaphragm one (13) and an explosion-proof diaphragm two (14), the explosion-proof diaphragm one (13) having a smaller burst pressure value than the explosion-proof diaphragm two (14), and the tube body two (5) being fixedly connected with a connecting opening (6) for connecting a gas guide tube at an end away from the tube body one (4).

2. The environmentally friendly high-voltage gas-insulated switchgear according to claim 1, characterized in that, An annular groove one (9) is formed in the inner wall of the tube body one (4) near the cabinet (1), and the side edge of the explosion-proof diaphragm one (13) is clamped in the annular groove one (9); an annular groove two (10) is formed in the inner wall of the tube body two (5) near the cabinet (1), and the side edge of the explosion-proof diaphragm two (14) is clamped in the annular groove two (10); and the annular groove one (9) and the annular groove two (10) are respectively provided with a sealing gasket one (11) and a sealing gasket two (12) clamped therein.

3. The environmentally friendly high-voltage gas-insulated metal-clad switchgear according to claim 2, characterized in that, A baffle (15) is clamped to the inner end of the tube body one (4) near the cabinet (1), the baffle (15) is provided with a hole, the edge of the baffle (15) is clamped in the annular groove one (9), a containing cavity is formed between the baffle (15) and the explosion-proof diaphragm one (13), and the containing cavity is filled with an adsorbent.

4. The environmentally friendly high-voltage gas-insulated metal-clad switchgear of claim 1, wherein, One end of the tube body one (4) is rotatably provided with a connecting ring (7), the inner wall of the connecting ring (7) and the outer wall of the exhaust opening (8) are provided with threads, and the inner wall of the connecting ring (7) and the outer wall of the exhaust opening (8) are threadedly connected.

5. The environmentally friendly high-voltage gas-insulated cabinet according to claim 4, characterized in that, The outer wall of the connecting ring (7) is fixedly connected with a plurality of protrusions (16), and the plurality of protrusions (16) are equidistantly arranged.

6. The environmentally friendly high-voltage gas-insulated metal-clad switchgear of claim 1, wherein, The upper ends of the plurality of cabinets (1) are fixedly connected with connecting plates (2), and the connecting plates (2) are used for fixing the upper ends of adjacent cabinets (1).

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