Outdoor ring main unit

Abstract

The utility model provides an outdoor ring main unit relates to ring main unit technical field, including cabinet body, cabinet door, installation through -hole, dustproof filter cover, it includes rectangular frame, louver, baffle, cooling fan, cloth bag filter piece, with valve discharge pipe, pulse dust collector, installation through -hole is all seted up in the lower extreme of cabinet door outer wall and cabinet body backplate upper end, dustproof filter cover is fixedly connected in installation through -hole outer wall edge place, the louver of rectangular frame inner wall outside side is set up to the rainwater, impurity that falls from high place is shielded, the installation through -hole in -place fixed cooling fan of cabinet door will inhale the outside air, the air inlet passes cloth bag filter piece and then enters the cabinet body, dust remains on the cloth bag filter piece surface, through the reverse blowing of pulse dust collector can remove the dust that adheres on the cloth bag filter piece surface, through above -mentioned design can carry out the dust that enters to the ring main unit air inlet and air outlet of continuous shielding filtration, avoid dust from two places to enter the ring main unit inside.

Description

Technical Field

[0001] This utility model relates to the field of ring main unit technology, and in particular to an outdoor ring main unit. Background Technology

[0002] The descriptions in this section provide background information relating to this disclosure and do not constitute prior art.

[0003] A ring main unit is a set of power transmission and distribution equipment. Its core components are load switches and fuses. It has the advantages of simple structure, small size, low price, and the ability to improve power supply parameters and performance as well as power supply safety. It is widely used in distribution stations and prefabricated substations in load centers such as urban residential areas, high-rise buildings, large public buildings, and factories.

[0004] In related technologies, outdoor ring main units are often placed in the field. The ring main unit is equipped with heat dissipation holes for air intake and exhaust to remove the heat generated by the internal components. The field environment has a lot of dust, and dust can easily enter the ring main unit through the heat dissipation holes. The accumulation of dust may cause the ring main unit to malfunction and affect its normal use. Utility Model Content

[0005] The purpose of this utility model is to provide an outdoor ring main unit that has the advantage of continuously blocking and filtering dust entering through the air inlet and outlet of the ring main unit, thus solving the technical problem in related technologies where dust easily enters through the air inlet and outlet of the outdoor ring main unit for heat dissipation, affecting its normal use.

[0006] This utility model provides an outdoor ring main unit, comprising:

[0007] The cabinet has a hinged door at its front opening.

[0008] The lower end of the outer wall of the cabinet door and the upper end of the back panel of the cabinet are both provided with mounting through holes;

[0009] A dustproof filter cover is fitted at the edge of the outer wall of the mounting through hole, which includes:

[0010] A rectangular frame, which is fitted onto the outer edge of the mounting through hole;

[0011] The rectangular frame is fixedly fitted with louvers on the outer side of its inner wall.

[0012] A partition is fixedly fitted to the inner side of the inner wall of the rectangular frame;

[0013] A cooling fan is fixedly installed on the inner wall of the mounting hole at the cabinet door, and its exhaust direction is towards the inside of the cabinet.

[0014] A cloth bag filter element is fixedly connected to the outer wall of the partition.

[0015] The bottom surface of the rectangular frame is fixedly connected to a discharge pipe with a valve.

[0016] A pulse dust collector is provided on the outside of the rectangular frame, with its output end extending toward the inner end of the corresponding bag filter element.

[0017] As a further optimization, in order to improve the filtration speed of the intake air and enhance the heat dissipation effect by using multiple cooling fans, each cooling fan is matched with two cloth bag filters. The number of cooling fans is two, and the two cooling fans are respectively fixedly assembled on the upper and lower sides of the inner wall of the mounting through hole.

[0018] Each of the dust filter covers has four filter bags, and two filter bags form a group;

[0019] Each set of the bag filters corresponds to one of the cooling fans.

[0020] As a further optimization, in order to filter the intake air and retain dust on the outer wall of the filter bag, the pulsed gas instantaneously inflates the filter bag during reverse blowing, causing the dust adhering to the outer wall of the filter bag to be shaken off. The filter bag includes:

[0021] The filter bag cage is fixedly assembled in the pre-reserved holes on the outer wall of the partition plate;

[0022] The filter bag cage is fitted with a filter bag on its outer wall, and a connecting ring is attached to one end of its opening.

[0023] The connecting ring is fixedly connected to the outer wall of the filter bag cage by bolts, and the other end of the connecting ring abuts against the outer wall of the corresponding partition.

[0024] As a further optimization, in order to discharge the dust dropped during reverse blowing, the valved discharge pipe includes:

[0025] The upper end of the discharge hopper is fixedly connected to the bottom surface of the rectangular frame;

[0026] A material discharge window is provided at the center of the bottom surface of the rectangular frame, corresponding to the position between the louver and the partition;

[0027] The lower end of the discharge hopper is fixedly equipped with a connecting pipe, which is equipped with a flap valve.

[0028] As a further optimization, to facilitate the installation and removal of the dust filter cover, a connecting structure is fitted between the inner end of the rectangular frame and the edge of the outer wall of the mounting through hole, which includes:

[0029] Slots are evenly spaced along the outer edge of the mounting through-hole;

[0030] A plug rod is fixedly connected to the slot at the inner end of the rectangular frame;

[0031] An adhesive layer is filled between the insertion rod and the inner wall of the corresponding slot.

[0032] As a further optimization, in order to utilize pulse gas to reverse-purge and clean the bag filter elements, the pulse dust collector includes:

[0033] An air chamber has an output pipe fixedly connected to its outer wall, and an electromagnetic pulse valve is installed on the output pipe.

[0034] The gas pack is fitted to the outside of the corresponding rectangular frame;

[0035] The output tube extends into the mounting through hole and is fixedly connected to a longitudinal tube, both ends of which are sealed.

[0036] A blow pipe is uniformly fixed and connected to the outer wall of the longitudinal tube near the side of the bag filter element.

[0037] The output end of the blowpipe faces the inner end of the corresponding bag filter element.

[0038] As a further optimization, in order to improve the stability of the air bag setup, a support rod is fixedly connected between the outer wall of the air bag and the corresponding outer wall of the rectangular frame.

[0039] As a further optimization, in order to disperse the air intake at the mounting holes of the cabinet door and improve the airflow for better heat dissipation of the internal components of the ring main unit, an air intake distributor is fixedly installed on the inner edge of the mounting holes at the cabinet door, which includes:

[0040] A circular plate, with one end of a support rod fixedly connected to the outer edge of the plate, and the other end of the support rod fixedly connected to the inner edge of the mounting through hole;

[0041] The circular plate has air inlet holes evenly distributed on its front and rear side walls;

[0042] The edge of the circular plate is bent to fit the inner edge of the mounting through hole.

[0043] As a further optimization, in order to provide stable support and fixation for the device, a fixing base is fixedly installed at the lower end of the cabinet, which includes:

[0044] Support columns are evenly and fixedly assembled on the bottom surface of the cabinet.

[0045] A concrete base, the lower end of which is cast into the concrete base.

[0046] As a further optimization, in order to shield the cabinet from rain and reduce the amount of rainwater falling on the outer wall of the ring main unit, a rain shield is fixedly installed on the upper part of the cabinet, and the rain shield extends out of the top surface of the cabinet on both the front and rear sides.

[0047] This utility model provides an outdoor ring main unit with the following improvements and advantages compared with the prior art:

[0048] The device has mounting holes at the lower end of the outer wall of the cabinet door and the upper end of the cabinet back panel. A dustproof filter cover is fixedly connected to the edge of the outer wall of the mounting hole. Louvers are installed on the outer side of the inner wall of the rectangular frame to block rainwater and impurities falling from a height. A cooling fan fixed in the mounting hole at the cabinet door draws in outside air. The air enters the cabinet after passing through the bag filter. Dust remains on the surface of the bag filter. The dust adhering to the surface of the bag filter can be removed by reverse blowing of the pulse dust collector. Through the above design, dust entering from the air inlet and outlet of the ring main unit can be continuously blocked and filtered, preventing dust from entering the ring main unit from these two places. Attached Figure Description

[0049] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0050] Figure 1 This is a schematic diagram of the structure of this utility model;

[0051] Figure 2 This is a schematic cross-sectional view of the structure at point A-A' of this utility model;

[0052] Figure 3 This is a schematic diagram of the rear structure of this utility model;

[0053] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0054] Figure 5 This is a schematic cross-sectional view of the structure of the bag filter element of this utility model;

[0055] Figure 6 This is a schematic diagram of the valve-equipped discharge pipe structure of this utility model;

[0056] Figure 7 This is a schematic diagram of the pulse dust collector of this utility model.

[0057] Explanation of reference numerals in the attached figures:

[0058] 1-Cabinet body, 11-Cabinet door, 2-Dustproof filter cover, 21-Connecting structure, 211-Slot, 212-Plug, 22-Rectangular frame, 23-Louvre, 24-Partition, 25-Discharge pipe with valve, 251-Discharge hopper, 252-Connecting pipe, 253-Flip valve, 26-Bag filter element, 261-Filter bag cage, 262-Connecting ring, 263-Filter bag, 3-Rain shield, 4-Fixed base, 41-Support column, 42-Concrete base, 5-Pulse dust collector, 51-Air manifold, 52-Support rod, 53-Output pipe, 54-Solenoid pulse valve, 55-Longitudinal pipe, 56-Pulse jet pipe, 6-Inlet distributor, 61-Circular plate, 62-Inlet through hole, 7-Cooling fan, 8-Mounting through hole. Detailed Implementation

[0059] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0060] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0061] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0062] Please see Figure 1-7 This utility model provides a technical solution: an outdoor ring main unit, comprising:

[0063] Cabinet 1, with a cabinet door 11 hinged at its front opening;

[0064] Mounting through holes 8 are provided at the lower end of the outer wall of cabinet door 11 and the upper end of the back panel of cabinet body 1;

[0065] A dust filter cover 2 is fitted at the outer edge of the mounting hole 8, which includes:

[0066] A rectangular frame 22 is fitted onto the outer edge of the mounting through hole 8;

[0067] Louvers 23 are fixedly fitted on the outer side of the inner wall of the rectangular frame 22;

[0068] A partition 24 is fixedly assembled on the inner side of the inner wall of the rectangular frame 22;

[0069] A cooling fan 7 is fixedly installed on the inner wall of the mounting through hole 8 at cabinet door 11, and its exhaust direction is towards the inside of cabinet body 1.

[0070] A cloth filter element 26 is fixedly connected to the outer wall of the partition 24;

[0071] The bottom surface of the rectangular frame 22 is fixedly connected to a discharge pipe 25 with a valve;

[0072] A pulse dust collector 5 is provided on the outside of the rectangular frame 22, and its output end extends toward the inner end of the corresponding bag filter element 26.

[0073] Specifically in this embodiment, the cabinet body 1 and the cabinet door 11 are the external protective shells of the outdoor ring network cabinet; the louver 23 is an application of existing technology, where rainwater and impurities falling from a height slide down the louver slope, preventing rainwater and impurities from entering through the louver gaps.

[0074] Furthermore, a cooling fan 7 is fixed in the mounting through hole 8 on the cabinet door 11 to guide external air into the cabinet 1 as a heat dissipation air intake. The air enters the cabinet 1 after passing through the bag filter 26. Dust remains on the surface of the bag filter 26. The dust adhering to the surface of the bag filter 26 can be removed by reverse blowing through the pulse dust collector 5.

[0075] More specifically, a dust filter cover 2 is also provided on the outer wall of the mounting through hole 8 at the back panel of the cabinet 1. The dust filter cover 2 here is designed to filter out dust in the air coming through the mounting through hole 8 at the back panel of the cabinet 1 during the heat dissipation and exhaust gap. The dust adhering to the surface of the filter bag 26 can be removed by reverse blowing of the pulse dust collector 5.

[0076] Understandably, the dust removed by the pulse dust collector 5 is discharged along the valved discharge pipe 25. When in use, the valve on it is opened to discharge the dust, which is then discharged directly to the outside of the cabinet 1.

[0077] In some embodiments, there are two cooling fans 7, and the two cooling fans 7 are respectively fixedly mounted on the upper and lower sides of the inner wall of the mounting through hole 8.

[0078] Each dust filter cover 2 has four bag filter elements 26, and two bag filter elements 26 are grouped together.

[0079] Each set of bag filters 26 corresponds to one cooling fan 7. With multiple cooling fans 7, each cooling fan 7 is matched with two bag filters 26, which improves the filtration speed of the intake air and enhances the heat dissipation effect.

[0080] In other embodiments, different numbers of cooling fans 7 can be provided, and different numbers of bag filters 26 can be provided for the cooling fans 7, and the number of bag filters 26 in each group can also be adapted.

[0081] In some embodiments, the bag filter element 26 includes:

[0082] The filter bag cage 261 is fixedly assembled in the pre-reserved hole on the outer wall of the partition 24;

[0083] A filter bag 263 is fitted onto the outer wall of the filter bag cage 261, and a connecting ring 262 is attached to one end of its opening.

[0084] The connecting ring 262 is fixedly connected to the outer wall of the filter bag cage 261 by bolts, and the other end of the connecting ring 262 abuts against the outer wall of the corresponding partition 24.

[0085] Specifically, in this embodiment, the filter bag 263 is made of polyester needle-punched felt, which is suitable for dust removal at room temperature and has good resilience.

[0086] Furthermore, the filter bag 263 is fitted onto the outer wall of the filter bag cage 261 and can be disassembled by removing the bolts on the outer wall of the connecting ring 262, making it easy to replace.

[0087] It is understandable that the partition 24 is fixed to the inner side of the inner wall by the ear plate and bolts. When replacing the filter bag 263, the dustproof filter cover 2 is removed and then the partition 24 is removed.

[0088] In some embodiments, the valved discharge pipe 25 includes:

[0089] The upper end of the discharge hopper 251 is fixedly connected to the bottom surface of the rectangular frame 22;

[0090] A material discharge window is provided at the center of the bottom surface of the rectangular frame 22, corresponding to the position between the louver 23 and the partition 24;

[0091] The lower end of the discharge hopper 251 is fixedly equipped with a connecting pipe 252, which is equipped with a flap valve 253.

[0092] Specifically in this embodiment, the outer wall of the valve plate of the flap valve 253 is wrapped with a rubber layer. The rubber layer is attached to the inner wall of the valve body to improve the sealing performance, so that the air intake will not overflow from here when the flap valve 253 is closed.

[0093] Furthermore, the flap valve 253 is opened periodically to discharge the filter bag 263 to remove the falling dust, including dust that falls from reverse blowing and dust that falls naturally.

[0094] In some embodiments, a connecting structure 21 is fitted between the inner end of the rectangular frame 22 and the edge of the outer wall of the mounting through hole 8, which includes:

[0095] Slots 211 are evenly distributed along the outer edge of the mounting through holes 8;

[0096] A plug rod 212 is fixedly connected to the slot 211 on the inner side of the rectangular frame 22;

[0097] An adhesive layer is filled between the insertion rod 212 and the inner wall of the corresponding slot 211.

[0098] Specifically in this embodiment, after the insertion rod 212 and the slot 211 are inserted, they are fixed by filling the gap with glue to form an adhesive layer, thereby ensuring the stability of the connection.

[0099] More specifically, the adhesive used is hot melt adhesive. When it is necessary to disassemble the dust filter cover 2, a hot air gun is used to blow on the outside of the connection between the insertion rod 212 and the slot 211 to melt the hot melt adhesive before disassembly.

[0100] It is understandable that after disassembly, the hot air gun should continue to blow hot air to clean up the melted hot melt adhesive and prevent the hot melt adhesive from flowing and solidifying and clogging the slot 211 after the hot air is removed. When reinstalling, a thin layer of hot melt adhesive is applied to the outer wall of the insertion rod 212 and then inserted into the slot 211. The hot melt adhesive fills the gap between the insertion rod 212 and the slot 211 and solidifies to form an adhesive layer.

[0101] In some embodiments, the pulse dust collector 5 includes:

[0102] An air tank 51 has an output pipe 53 fixedly connected to its outer wall, and an electromagnetic pulse valve 54 is provided on the output pipe 53.

[0103] The air bag 51 is assembled on the outside of the corresponding rectangular frame 22;

[0104] The output tube 53 extends into the mounting through hole 8 and is fixedly connected to the longitudinal tube 55, both ends of which are sealed.

[0105] A blow pipe 56 is uniformly fixed and connected to the outer wall of the longitudinal tube 55 on the side near the bag filter element 26.

[0106] The output end of the blowpipe 56 faces the inner end of the corresponding bag filter element 26.

[0107] Specifically, in this embodiment, the gas reservoir 51 is a prior art gas storage device, and in this embodiment, the gas reservoir 52 stores clean air and is replenished periodically.

[0108] Furthermore, air is supplied into the output pipe 53 through the air tank 51. The electromagnetic pulse valve 54 is equipped with an electromagnetic pulse valve controller, which is installed in the cabinet 1. The electromagnetic pulse valve 54 is controlled to perform gas blowing. The blowing gas enters the longitudinal pipe 55 along the output pipe 53 and is finally sprayed from the blowing pipe 56 to the opening end of the bag filter element 26.

[0109] More specifically, reverse blowing dust removal is carried out regularly, and the interval is adjusted according to the amount of dust in the environment. Since the air tank 51 is not used continuously, the air replenishment cycle is relatively long, which meets the conditions for easy maintenance of outdoor use.

[0110] Understandably, in some remote areas where maintenance is inconvenient, an air storage tank can be installed. The air storage tank is connected to the air tank 51 through a pipeline. A solenoid valve is installed on this pipeline, and a controller is installed to open and close the solenoid valve at regular intervals. The air storage tank automatically replenishes the air tank 51, extending the maintenance cycle.

[0111] In some embodiments, a support rod 52 is fixedly connected between the outer wall of the air bag 51 and the outer wall of the corresponding rectangular frame 22 to improve the stability of the air bag 51 installation.

[0112] In some embodiments, an air intake distributor 6 is fixedly mounted at the inner edge of the mounting through hole 8 at the cabinet door 11, which includes:

[0113] A circular plate 61 has one end of a support rod fixedly connected to its outer edge, and the other end of the support rod is fixedly connected to the inner edge of the mounting through hole 8.

[0114] The circular plate 61 has air inlet holes 62 evenly distributed on its front and rear side walls;

[0115] The edge of the circular plate 61 is bent to fit the inner edge of the corresponding mounting through hole 8.

[0116] Specifically, in this embodiment, the air intake is dispersed through the evenly distributed air intake holes 62 on the circular plate 61, so that the air intake has a larger contact area with the heat-generating device, and carries away the heat to achieve heat dissipation.

[0117] Furthermore, the semicircular 61 edge is designed to bend outward to form an arc edge, preventing the operator from bumping into it.

[0118] In some embodiments, a mounting base 4 is fixedly assembled at the lower end of the cabinet 1, which includes:

[0119] Support column 41 is evenly and fixedly assembled on the bottom surface of cabinet 1;

[0120] The lower end of the support column 41 is cast into the concrete base 42.

[0121] Specifically, in this embodiment, the concrete base 42 can be placed on the ground or pre-embedded in the ground;

[0122] Furthermore, the device can be raised by the support of the fixed base 4, reducing the impact of ground water on the device.

[0123] In some embodiments, a rain shield 3 is fixedly installed on the upper end of the cabinet 1, and the rain shield 3 extends out of the top surface of the cabinet 1 on both the front and rear sides. The rain shield 3 serves to block rain and guide rainwater along the top slope. The rain shield 3 extends out of the top surface to guide rainwater away from the cabinet 1, thereby reducing the amount of rainwater falling on the outer wall of the cabinet 1.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An outdoor ring main unit, characterized in that, include: The cabinet (1) has a cabinet door (11) hinged at its front opening; The lower end of the outer wall of the cabinet door (11) and the upper end of the back panel of the cabinet body (1) are provided with mounting through holes (8); A dust filter cover (2) is fitted at the edge of the outer wall of the mounting through hole (8), which includes: A rectangular frame (22) is fitted to the edge of the outer wall of the mounting through hole (8); The rectangular frame (22) is fixedly fitted with louvers (23) on the outer side of its inner wall; A partition (24) is fixedly assembled on the inner side of the inner wall of the rectangular frame (22); A cooling fan (7) is fixedly installed on the inner wall of the mounting through hole (8) at the cabinet door (11), and its exhaust direction is towards the inside of the cabinet (1); The outer wall of the partition (24) is fixedly connected to a cloth bag filter element (26); The bottom surface of the rectangular frame (22) is fixedly connected to a discharge pipe (25) with a valve; A pulse dust collector (5) is provided on the outside of the rectangular frame (22), and its output end extends toward the inner end of the corresponding bag filter (26).

2. An outdoor ring main unit according to claim 1, characterized in that, There are two cooling fans (7), and the two cooling fans (7) are respectively fixedly assembled on the upper and lower sides of the inner wall of the mounting through hole (8); Each of the dust filter covers (2) has four bag filter elements (26), and two bag filter elements (26) form a group; Each of the bag filters (26) corresponds to one of the cooling fans (7).

3. An outdoor ring main unit according to claim 1, characterized in that, The bag filter element (26) includes: The filter bag cage (261) is fixedly assembled in the pre-reserved hole on the outer wall of the partition (24); The filter bag cage (261) is fitted with a filter bag (263) on its outer wall, and a connecting ring (262) is attached to one end of its opening. The connecting ring (262) is fixedly connected to the outer wall of the filter bag cage (261) by bolts, and the other end of the connecting ring (262) abuts against the outer wall of the corresponding partition (24).

4. An outdoor ring main unit according to claim 1, characterized in that, The valved discharge pipe (25) includes: The upper end of the discharge hopper (251) is fixedly connected to the bottom surface of the rectangular frame (22); A material discharge window is provided at the center of the bottom surface of the rectangular frame (22) corresponding to the position between the louver (23) and the partition (24); The lower end of the discharge hopper (251) is fixedly equipped with a connecting pipe (252), which is provided with a flap valve (253).

5. An outdoor ring main unit according to claim 1, characterized in that, A connecting structure (21) is fitted between the inner end of the rectangular frame (22) and the outer edge of the mounting through hole (8), which includes: Slots (211) are evenly distributed at the outer edge of the mounting through holes (8); The inner end of the rectangular frame (22) is fixedly connected to the slot (211) with a plug rod (212); An adhesive layer is filled between the insertion rod (212) and the inner wall of the corresponding slot (211).

6. An outdoor ring main unit according to claim 1, characterized in that, The pulse dust collector (5) includes: An air bag (51) has an output pipe (53) fixedly connected to its outer wall, and an electromagnetic pulse valve (54) is provided on the output pipe (53). The air bag (51) is assembled on the outside of the corresponding rectangular frame (22); The output tube (53) extends into the mounting through hole (8) and is fixedly connected to the longitudinal tube (55), both ends of which are sealed. The outer wall of the longitudinal tube (55) is uniformly connected to the blow pipe (56) on the side near the bag filter element (26); The output end of the blow pipe (56) faces the inner end of the corresponding bag filter element (26).

7. An outdoor ring main unit according to claim 6, characterized in that, A support rod (52) is fixedly connected between the outer wall of the air bag (51) and the outer wall of the corresponding rectangular frame (22).

8. An outdoor ring main unit according to claim 1, characterized in that, An air intake distributor (6) is fixedly mounted on the inner edge of the mounting through hole (8) at the cabinet door (11), which includes: A circular plate (61) has one end of a support rod fixedly connected to its outer edge, and the other end of the support rod is fixedly connected to the inner edge of the mounting through hole (8). The circular plate (61) has air inlet holes (62) evenly distributed on its front and rear side walls; The edge of the circular plate (61) is bent to fit the inner edge of the mounting through hole (8).

9. An outdoor ring main unit according to claim 1, characterized in that, The lower end of the cabinet (1) is fixedly fitted with a mounting base (4), which includes: Support columns (41) are evenly and fixedly assembled on the bottom surface of the cabinet (1); The concrete base (42) is formed by casting the lower end of the support column (41) into the concrete base (42).

10. An outdoor ring main unit according to claim 1, characterized in that, The upper end of the cabinet (1) is fixedly fitted with a rain shield (3), and the rain shield (3) extends out of the top surface of the cabinet (1) on both the front and rear sides.

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