Ring main unit with plugging structure

Abstract

The utility model discloses a ring main unit with a plugging structure, the ring main unit with the plugging structure comprises a cabinet body and a threading hole arranged at the bottom of the cabinet body, a partition plate is arranged in the cabinet body, a distance is kept between the partition plate and the bottom of the cabinet body to form a wire accommodating cavity, and the wire accommodating cavity is provided with a drawable moisture-proof device used for absorbing moist air in the wire accommodating cavity; the partition plate is provided with a plurality of first sealing devices at equal intervals, and the first sealing devices are used for supporting and enhancing the sealing performance with the partition plate; and a second sealing device is arranged at one end of the first sealing device. According to the utility model, the first sealing device reinforces the sealing performance with the partition plate, the second sealing device is rotated to deform the sealing gasket, so that the sealing gasket is tightly attached to the surface of the cable, the sealing performance is maintained, the moisture-proof device reduces the air humidity degree in the cable accommodating cavity, the service life of the first sealing device and the second sealing device is prolonged, and the service life of the cable accommodating cavity is prolonged. And the product has the advantages of good sealing performance, long service life, good plugging effect and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of ring network cabinets, in particular to a ring network cabinet with a blocking structure. Background Art

[0002] A ring main unit is an electrical device consisting of a group of high-voltage switchgear installed in a steel plate metal cabinet or made into an assembled interval ring main unit. Its core part uses load switches and fuses. It has the advantages of simple structure, small size, low price, improved power supply parameters and performance, and power supply safety.

[0003] Ring main units are placed outdoors for a long time and are often invaded by small animals. They are also affected by rain, moisture, high temperature and other weather conditions, which cause condensation. Condensation accumulates on the surface of electrical components in the unit or invades the inside of electrical components, which can easily cause electrical equipment failures or fires.

[0004] Therefore, the ring network cabinet is usually sealed at the inlet and outlet lines to effectively seal the environment inside the cabinet and prevent small animals and moisture from invading through the cable gaps. Traditional materials commonly used to seal the bottom of the cabinet and the inlet and outlet lines are fireproof mud, fireproof board, cement mortar and other materials.

[0005] However, there are defects in using fireproof mud for sealing: high temperature will cause the fireproof mud for sealing to melt and deform, the fireproof mud will dry and crack over time, and the mechanical vibration will cause the fireproof mud to loosen, which will cause the fireproof mud for sealing to lose its sealing performance. Therefore, the applicant has made a useful design and found a solution to the above problems. The technical solution to be introduced below was produced in this context. Summary of the invention

[0006] The purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional ring network cabinet sealing design and provide a product with good sealing performance, long service life and good sealing effect.

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] A ring network cabinet with a blocking structure comprises a cabinet body and a wire threading hole arranged at the bottom of the cabinet body, a partition is arranged in the cabinet body and keeps a distance from the bottom of the cabinet body to form a wire accommodating cavity, the wire accommodating cavity is provided with a pullable moisture-proof device for absorbing humid air in the wire accommodating cavity; the partition is provided with a plurality of equally spaced first sealing devices for supporting and strengthening the sealing with the partition; a second sealing device is provided at one end of the first sealing device for cable passing and sealing with the cable; when the second sealing device is rotated, the second sealing device is deformed and tightly adheres to the surface of the cable.

[0009] Preferably, the partition is provided with a plurality of equally spaced through holes, one end of the through hole is provided with a first countersunk hole, and the other end of the through hole is provided with a second countersunk hole.

[0010] Preferably, the moisture-proof device includes a drawer body and a cover plate, the drawer body is provided with a makeshift groove for avoiding the threading hole and the first sealing device, the drawer body is provided with a desiccant, the drawer body is provided with a slope, and is located on both sides of the makeshift groove, each surface of the makeshift groove is provided with a plurality of equally spaced through holes, and is connected to the drawer body, the drawer body is provided with a water collection area, the drawer body is provided with an output port, and is connected to the water collection area, a plurality of magnets are provided in the drawer body, and are magnetically attracted to the cover plate, so that the cover plate abuts against the top of the drawer body.

[0011] Preferably, the first sealing device includes a sealing sleeve and a connecting piece, a first retaining ring is provided at one end of the sealing sleeve, the first retaining ring is provided with a gasket, when the sealing sleeve is inserted into the through hole, the gasket abuts against the first countersunk hole, the first retaining ring is provided with a sealing groove, the connecting piece is provided with a second retaining ring, the second retaining ring is provided with a third countersunk hole, the third countersunk hole is provided with a sealing ring, the connecting piece is provided with a support portion, and the support portion is extended with a connecting portion.

[0012] Preferably, the connecting portion and the expanding portion are sequentially inserted into the sealing sleeve, and when the third countersunk hole abuts against the first retaining ring, the sealing ring enters the sealing groove to form a sealing structure, and the second retaining ring abuts against the first countersunk hole, so that the expanding portion expands the inner wall of the sealing sleeve, and the sealing sleeve is connected and fixed to the through hole by interference fit.

[0013] Preferably, the second sealing device includes a support member, a nut, and a sealing gasket. The support member is provided with a limiting portion, and the support member is threadedly connected to the connecting portion so that the limiting portion abuts against the end face of the sealing bushing. A reducing portion is provided inside the support member, and the sealing gasket is provided with a tightening portion corresponding to the reducing portion and abuts against the reducing portion. The sealing gasket is provided with a plurality of wire holes for cables to be inserted.

[0014] Preferably, the nut is threadedly connected to the support member and abuts against the sealing gasket. The nut is provided with a hollow column and is inserted and fitted into the second countersunk hole and maintains a distance from the bottom of the second countersunk hole.

[0015] Beneficial effects:

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model strengthens the sealing performance of the connection with the perforation through the first sealing device, and deforms the sealing gasket by rotating the nut, so that the sealing gasket is tightly attached to the cable surface and the cable is fixed. Each wire hole corresponds to a cable, which effectively ensures that the wire hole can fit the cable surface to the greatest extent, reduces the gap between it and the cable, thereby ensuring the sealing performance of the sealing gasket and the cable, reduces the air humidity in the wire cavity through the moisture-proof device, and extends the service life of the first sealing device and the second sealing device, so that the product has the advantages of good sealing performance, long service life, good blocking effect, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the side cross-section structure of a ring main unit with a blocking structure according to the utility model;

[0019] Figure 2 For this utility model Figure 1 A partial structure enlarged view of the detail A of a ring main unit with a blocking structure;

[0020] Figure 3 This is an exploded view of a moisture-proof device of a ring main unit with a blocking structure according to the utility model;

[0021] Figure 4 An exploded view of a first sealing device of a ring network cabinet with a blocking structure according to the utility model;

[0022] Figure 5 An exploded view of a second sealing device of a ring network cabinet with a blocking structure according to the utility model;

[0023] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0024] Reference numerals: 1, cabinet; 2, moisture-proof device; 3, first sealing device; 4, second sealing device;

[0025] 11. Threading hole; 12. Partition plate; 13. Wire cavity; 14. Perforation; 15. First countersunk hole; 16. Second countersunk hole;

[0026] 21. Drawer body; 22. Cover plate; 23. Magnet;

[0027] 211, recess; 222, slope; 223, through hole; 224, water collection area; 225, outlet;

[0028] 31. Sealing bushing; 32. Connector; 33. Gasket; 34. Sealing ring;

[0029] 311, first retaining ring; 312, sealing groove;

[0030] 321, second retaining ring; 322, third countersunk hole; 323, expansion portion; 324, connecting portion;

[0031] 41. Support member; 42. Nut; 43. Sealing gasket;

[0032] 411, limiting portion; 412, reducing portion;

[0033] 421. Hollow column;

[0034] 431. tightening portion; 432. thread hole. DETAILED DESCRIPTION

[0035] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0037] Reference example Figures 1 to 5 A ring network cabinet with a blocking structure includes a cabinet body 1 and a wire threading hole 11 arranged at the bottom of the cabinet body 1. A partition 12 is arranged in the cabinet body 1 and keeps a distance from the bottom of the cabinet body 1 to form a wire cavity 13. The wire cavity 13 is provided with a retractable moisture-proof device 2 for absorbing the humid air in the wire cavity 13; the partition 12 is provided with a plurality of equally spaced first sealing devices 3 for supporting and strengthening the sealing with the partition 12; a second sealing device 4 is provided at one end of the first sealing device 3 for cable passing and sealing with the cable; when the second sealing device 4 is rotated, the second sealing device 4 is deformed and closely adheres to the surface of the cable.

[0038] It is worth mentioning that the partition 12 is provided with a plurality of equally spaced through holes 14, one end of the through hole 14 is provided with a first countersunk hole 15, and the other end is provided with a second countersunk hole 16, the through hole 14 is used in conjunction with the sealing bushing 31, the first countersunk hole 15 is used in conjunction with the gasket 33 and the second retaining ring 321, and the second countersunk hole 16 is used in conjunction with the hollow column 421;

[0039] It is worth mentioning that the moisture-proof device 2 includes a drawer body 21 and a cover plate 22. The drawer body 21 is provided with a recess 211 for avoiding the threading hole 11 and the first sealing device 3. A desiccant is installed in the drawer body 21. A slope 222 is provided in the drawer body 21 and is located on both sides of the recess 211. Each surface of the recess 211 is provided with a plurality of equally spaced through holes 223 and is connected to the drawer body 21. A water collection area 224 is provided in the drawer body 21. The drawer body 21 is provided with an output port 225 and is connected to the water collection area 224. A plurality of magnets 23 are provided in the drawer body 21 and are magnetically attracted to the cover plate 22 so that The cover plate 22 abuts against the top of the drawer body 21, and the recess 211 prevents interference with the perforation 14 and the first sealing device 3. When the desiccant absorbs water, a chemical reaction occurs to generate hydrates. The hydrates flow into the water collection area 224 through the slope 222 and are discharged through the outlet 225 to prevent water from being stored in the drawer body 21 all the time, thereby accelerating the consumption of the desiccant. The outlet 225 can be connected to an external water pipe, and the desiccant can be regularly replenished through the easily detachable cover plate 22. The desiccant can be a solid desiccant, which uses a porous substance with a large surface area to absorb moisture from the air under surface adsorption and capillary condensation.

[0040] It is worth mentioning that the first sealing device 3 includes a sealing bushing 31 and a connecting piece 32. A first retaining ring 311 is provided at one end of the sealing bushing 31. The first retaining ring 311 is provided with a gasket 33. When the sealing bushing 31 is inserted into the through hole 14, the gasket 33 abuts against the first countersunk hole 15. The first retaining ring 311 is provided with a sealing groove 312. The connecting piece 32 is provided with a second retaining ring 321. The second retaining ring 321 is provided with a third countersunk hole 322. The third countersunk hole 322 is provided with a sealing ring 34. The connecting piece 32 is provided with a propping portion 323. The propping portion 323 is extended with a connecting portion 324. The sealing bushing 31 can be made of rubber material. The sealing groove 312 is used in conjunction with the sealing ring 34. The third countersunk hole 322 not only plays a limiting role, but also plays a role in applying extrusion force to the first retaining ring 311. The propping portion 323 props up the inner wall of the sealing bushing 31 to expand the diameter of the sealing bushing 31.

[0041] It is worth mentioning that the connecting portion 324 and the opening portion 323 are inserted into the sealing bushing 31 in sequence. When the third counterbore 322 abuts the first baffle 311, the sealing ring 34 enters the sealing groove 312 to form a sealing structure, the second baffle 321 abuts the first counterbore 15, and the opening portion 323 opens the inner wall of the sealing bushing 31, so that the sealing bushing 31 is connected and fixed to the perforation 14 by interference fit, and the sealing bushing 31 is placed in the perforation 14. At this time, there is a gap between the sealing bushing 31 and the inner wall of the perforation 14. In order to prevent humid air from entering the cabinet 1 through the gap, the connecting portion 324 and the opening portion 323 are inserted into the sealing bushing 31. As the distance between the third counterbore 322 and the first baffle gradually approaches, the opening portion 323 expands the diameter of the sealing bushing 31. The connecting piece 32 is connected and fixed to the sealing bushing 31 by interference fit, and the diameter of the sealing bushing 31 expands. The sealing bushing 31 is made to be tightly attached to the perforation 14 to form a first sealing measure, and is connected and fixed to the perforation 14 by means of interference fit. At this time, the third counterbore 322 is tightly attached to the first retaining ring 311, and the sealing ring 34 is embedded in the sealing groove 312 to form a labyrinth sealing structure, thereby improving the connection sealing performance between the first retaining ring 311 and the second retaining ring 321. This is a second sealing measure. The second retaining ring 321 is inserted into the first counterbore 15 and wrapped around the first retaining ring 311 and the gasket 33, thereby reducing the external air from entering between the first retaining ring 311 and the second retaining ring 321. This is a third sealing measure. Since the gasket 33 is squeezed by the first baffle, it is deformed, thereby filling the gap between the first retaining ring 311 and the first counterbore 15. This is a fourth sealing measure. Through the above four sealing measures, external humid air is effectively prevented from entering the cabinet 1 through the threading hole 11, thereby ensuring the safety of the electrical components in the cabinet 1.

[0042] It is worth mentioning that the second sealing device 4 includes a support member 41, a nut 42, and a sealing gasket 43. The support member 41 is provided with a limiting portion 411, and the support member 41 is threadedly connected to the connecting portion 324, so that the limiting portion 411 abuts against the end surface of the sealing bushing 31. A reduced diameter portion 412 is provided in the support member 41, and the sealing gasket 43 is provided with a tightening portion 431 corresponding to the reduced diameter portion 412 and abuts against the reduced diameter portion 412. The sealing gasket 43 is provided with a plurality of wire holes 432 for cables to be inserted. The support member 41 provides support for the sealing gasket 43, and the limiting portion 411 limits the depth of the support member 41 entering the connecting portion 324. The reduced diameter portion 412 is used in conjunction with the tightening portion 431. The reduced diameter portion 412 is wide at the top and narrow at the bottom. The sealing gasket 43 can be made of rubber material.

[0043] It is worth mentioning that the nut 42 is threadedly connected to the support member 41 and abuts the sealing gasket 43. The nut 42 is provided with a hollow column 421, and is inserted and fits in the second countersunk hole 16, and maintains a distance from the bottom of the second countersunk hole 16. The hollow column 421 is inserted in the second countersunk hole 16 to prevent humid air from entering the cabinet 1 through the gap between the sealing bushing 31 and the perforation 14, thereby enhancing the sealing performance. Maintaining the distance facilitates the up and down movement of the nut 42. When the tightening resistance is large, the nut 42 can be rotated by a wrench.

[0044] The use principle of the utility model is now described as follows:

[0045] Pass the cables through the threading holes 11 into the wire cavity 13. Each cable corresponds to a wire hole 432. Pass the cables through the wire holes 432. When all the wire holes 432 on the sealing gasket 43 are full of cables, screw the nut 42 into the connecting portion 324 and push the sealing gasket 43 downward. As the end face of the nut 42 is closer to the end face of the sealing bushing 31, the pressure applied to the sealing gasket 43 is greater. The tightening portion 431 follows the guidance of the reducing portion 412 to gradually deform the sealing gasket 43 and squeeze it in the axial direction, so that the wire holes 432 are tightly attached to the surface of the cable and the cable is fixed.

[0046] The above design scheme can enable the product to achieve the advantages of good sealing performance, long service life and good plugging effect.

[0047] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A ring main unit with a blocking structure, comprising a cabinet body (1), and a threading hole (11) arranged at the bottom of the cabinet body (1), characterized in that: The cabinet (1) is provided with a partition (12) which is spaced apart from the bottom of the cabinet (1) to form a wire accommodating cavity (13); the wire accommodating cavity (13) is provided with a retractable moisture-proof device (2) for absorbing humid air in the wire accommodating cavity (13); The partition (12) is provided with a plurality of first sealing devices (3) at equal intervals, which are used to provide support and enhance the sealing performance with the partition (12); A second sealing device (4) is provided at one end of the first sealing device (3) for allowing the cable to pass through and for sealing the cable; When the second sealing device (4) is rotated, the second sealing device (4) is deformed and closely adheres to the surface of the cable.

2. The ring main unit with a blocking structure according to claim 1, characterized in that: The partition plate (12) is provided with a plurality of equally spaced through holes (14), one end of the through hole (14) is provided with a first countersunk hole (15), and the other end is provided with a second countersunk hole (16).

3. The ring main unit with a blocking structure according to claim 1, characterized in that: The moisture-proof device (2) comprises a drawer body (21) and a cover plate (22). The drawer body (21) is provided with a clearance groove (211) for avoiding the threading hole (11) and the first sealing device (3). A desiccant is installed in the drawer body (21). A slope (222) is provided in the drawer body (21) and is located on both sides of the clearance groove (211). Each surface of the clearance groove (211) is provided with a plurality of equally spaced through holes (223) and is connected to the drawer body (21). A water collection area (224) is provided in the drawer body (21). The drawer body (21) is provided with an output port (225) and is connected to the water collection area (224). A plurality of magnets (23) are provided in the drawer body (21) and are magnetically attracted to the cover plate (22) so that the cover plate (22) abuts against the top of the drawer body (21).

4. The ring main unit with a blocking structure according to claim 2, characterized in that: The first sealing device (3) comprises a sealing bushing (31) and a connecting piece (32). A first retaining ring (311) is provided at one end of the sealing bushing (31). The first retaining ring (311) is provided with a gasket (33). When the sealing bushing (31) is inserted into the through hole (14), the gasket (33) abuts against the first countersunk hole (15). The first retaining ring (311) is provided with a sealing groove (312). The connecting piece (32) is provided with a second retaining ring (321). The second retaining ring (321) is provided with a third countersunk hole (322). The third countersunk hole (322) is provided with a sealing ring (34). The connecting piece (32) is provided with a support portion (323). The support portion (323) is extended with a connecting portion (324).

5. The ring main unit with a blocking structure according to claim 4, characterized in that: The connecting portion (324) and the expanding portion (323) are sequentially inserted into the sealing sleeve (31). When the third counterbore (322) abuts against the first retaining ring (311), the sealing ring (34) enters the sealing groove (312) to form a sealing structure. The second retaining ring (321) abuts against the first counterbore (15), and the expanding portion (323) expands the inner wall of the sealing sleeve (31), so that the sealing sleeve (31) is connected and fixed to the through hole (14) by interference fit.

6. The ring main unit with a blocking structure according to claim 4, characterized in that: The second sealing device (4) comprises a support member (41), a nut (42), and a sealing gasket (43); the support member (41) is provided with a limiting portion (411); the support member (41) is threadedly connected to the connecting portion (324) so ​​that the limiting portion (411) abuts against the end surface of the sealing bushing (31); a reducing portion (412) is provided inside the support member (41); the sealing gasket (43) is provided with a tightening portion (431) corresponding to the reducing portion (412) and abuts against the reducing portion (412); the sealing gasket (43) is provided with a plurality of wire holes (432) for cables to be inserted.

7. The ring main unit with a blocking structure according to claim 6, characterized in that: The nut (42) is threadedly connected to the support member (41) and abuts against the sealing gasket (43). The nut (42) is provided with a hollow column (421) and is inserted and fitted into the second countersunk hole (16) and maintains a distance from the bottom of the second countersunk hole (16).

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