Anti-breakdown device for power transmission 35Kv single-core cable

Abstract

The utility model discloses a 35Kv single-core cable anti-breakdown device for power transmission, which comprises a shell, a bottom plate penetrates through the center of the bottom of the shell, first insulating rubber sleeves vertically penetrate through two ends of the bottom plate, a placement frame is welded at the outer edge of the top of the bottom plate, and a cable intermediate joint is sleeved at the top end of the inner wall of the placement frame. The outer wall of the grounding end wire is connected with the inner wall of the first insulating rubber sleeve in a sleeved mode, and cable bodies are fixedly connected to the centers of the outer walls of the two sides of the cable middle connector. The sealing performance of the connecting structure of the grounding end wire, the cable body and the anti-breakdown device is improved, so that underground water is prevented from flowing into the anti-breakdown device, the cable joint position can be protected by arranging the shell and the top cover structure, so that external collision is reduced, the service life of the single-core cable is further prolonged, and the warning sticker is arranged, so that the safety of the cable is improved. And pedestrians or vehicles can be warned.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply and distribution, in particular to a 35Kv single-core cable anti-breakdown device for power transmission. Background Art

[0002] The 35kV grounding system of the campus transformer is part of the power system, and its grounding method is of great significance to the safe and stable operation of the power system. In the 35kV system, a small current grounding system is usually used, also known as a non-effective grounding system. This grounding method includes ungrounded neutral point, grounding through arc suppression coils, and high-impedance grounding systems. In a small current grounding system, the grounding current is small during a fault, so a higher impedance is required to limit the size of the fault current.

[0003] The induced voltage on the metal armor layer of a single-core transmission cable is relatively high, which will cause discharge to the ground and cause a 35kV cable insulation breakdown accident, causing low voltage in the entire substation 35kV system, seriously affecting the normal production of each workshop in the system. Based on these problems, Chinese patent CN214380010U discloses a 35Kv single-core cable anti-breakdown device for long-distance power transmission. It prevents the induced voltage of the cable metal shield armor layer from being too high when the 35KV single-core cable is transmitted over a long distance (over 2000 meters). The cable metal armor shielding layer passes through the outer sheath to discharge to the ground for a long time, causing the cable main insulation to break down and cause an accident, and solves the problem of overvoltage in the current cross-connected cable metal armor shielding layer overvoltage protection method in actual use.

[0004] When the device is in use, it cannot provide a good protective environment for the insulating intermediate joint on the cable. When it is hit by external forces or the joint is soaked by groundwater, it is easy to reduce the insulation effect of the insulating intermediate joint, thereby causing the cable to be broken down. At this time, the current will directly pass through the breakdown port to form a short circuit, causing a circuit short circuit failure. In severe cases, high temperature, high pressure and harmful gases will be generated, causing harm to equipment and personnel. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A 35Kv single-core cable breakdown prevention device for power transmission, comprising a shell, a bottom plate passing through the center of the bottom of the shell, a first insulating rubber sleeve passing through both ends of the bottom plate vertically, a placement frame welded at the outer edge of the top of the bottom plate, a cable intermediate joint sleeved on the top of the inner wall of the placement frame, grounding terminal wires fixedly connected to both ends of the bottom of the cable intermediate joint, the outer walls of the grounding terminal wires sleeved on the inner wall of the first insulating rubber sleeve, a cable body fixedly connected at the center of the outer walls on both sides of the cable intermediate joint, a second insulating rubber sleeve passing through the center of both sides of the inner wall of the shell horizontally, the outer walls of the cable body sleeved on the inner wall of the second insulating rubber sleeve, a rubber ring sleeved on the top of the outer wall of the shell, a top cover bonded to the outer wall of the rubber ring, U-shaped plates welded at the front and rear ends of the top of the top cover, and a warning sticker bonded to the top of the outer wall of the U-shaped plate.

[0008] As a further description of the above technical solution:

[0009] Bases are welded to the bottom ends of the outer walls on both sides of the shell, and first sleeves are vertically penetrated at both ends of the base, and a pressing shaft is sleeved on the inner wall of the first sleeve.

[0010] As a further description of the above technical solution:

[0011] The bottom of the pressing shaft is welded with an insert rod, the outer wall of the insert rod is fixedly connected with multiple groups of convex rings, and the top of the outer wall of the first sleeve is threadedly connected with a first stop cover.

[0012] As a further description of the above technical solution:

[0013] Both ends of the top of the cable intermediate joint are fixedly connected with lightning arresters, both ends of the top of the shell are fixedly connected with plug shafts, both ends of the top of the top cover are vertically penetrated by second sleeves, and the outer wall of the plug shaft is sleeved with the bottom end of the inner wall of the second sleeve.

[0014] As a further description of the above technical solution:

[0015] The inner wall at the center of the top of the plug shaft is threadedly connected with a bolt, the top of the outer wall of the second sleeve is sleeved with a second stop cover, and the plug shaft, the second sleeve, the bolt and the second stop cover are provided in two groups.

[0016] As a further description of the above technical solution:

[0017] A threaded sleeve is vertically penetrated at the center of the top of the top cover, a threaded rod is threadedly connected to the inner wall of the threaded sleeve, a rotating shaft is rotatably connected to the bottom of the threaded rod, a pressure plate is fixedly connected to the bottom of the rotating shaft, and a third stop cover is threadedly connected to the top of the outer wall of the threaded sleeve.

[0018] As a further description of the above technical solution:

[0019] An arc-shaped bulge is welded on the top of the U-shaped plate, and a plurality of groups of anti-slip grooves are arranged on the top of the arc-shaped bulge.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] (1) By providing a connection structure between the first insulating rubber sleeve and the grounding terminal wire, and between the cable body and the second insulating rubber sleeve, it is beneficial to improve the sealing of the connection structure between the grounding terminal wire and the cable body and the anti-breakdown device, thereby preventing groundwater from flowing into the anti-breakdown device. By providing a shell and a top cover structure, the cable joint position can be protected, thereby reducing external collisions and further improving the service life of the single-core cable. By providing a warning sticker, pedestrians or vehicles can be warned.

[0022] (2) By hammering the pressing shaft, the insertion rod can be quickly inserted into the ground, thereby fixing the entire anti-penetration device. By setting multiple sets of convex rings, the contact area between the insertion rod structure and the soil can be expanded, thereby further improving the stability of the entire insertion rod structure. By setting a connection structure between the first sleeve and the first stop cover, the pressing shaft can be fixed in the first sleeve, thereby preventing the insertion rod from sliding upward. By setting a connection structure between the third stop cover and the threaded sleeve, it is beneficial to improve the stability of the threaded rod on the inner wall of the threaded sleeve, thereby preventing the threaded rod from sliding upward. By setting a connection structure between the second sleeve and the second stop cover, the connection structure between the insertion shaft and the bolt can be covered, and the groundwater can be blocked at the same time, thereby further slowing down the rusting speed of the connection structure between the bolt and the insertion shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is one of the structural schematic diagrams of the utility model;

[0024] Figure 2 This is the second structural diagram of the utility model;

[0025] Figure 3 It is a front view of the utility model;

[0026] Figure 4 It is a front cross-sectional view of the utility model;

[0027] Figure 5 For this utility model Figure 4 A partial enlarged view of the middle A area;

[0028] Figure 6 For this utility model Figure 4 A partial enlarged view of the middle B area;

[0029] Figure 7 For this utility model Figure 4 A partial enlarged view of area C in the middle.

[0030] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0031] 1. Shell; 2. Base; 3. First sleeve; 4. Pressing shaft; 5. Inserting rod; 6. Convex ring; 7. First stop cover; 8. Bottom plate; 9. First insulating rubber sleeve; 10. Placement frame; 11. Cable intermediate joint; 12. Grounding terminal line; 13. Cable body; 14. Second insulating rubber sleeve; 15. Lightning arrester; 16. Inserting shaft; 17. Second sleeve; 18. Top cover; 19. Rubber ring; 20. Bolt; 21. Second stop cover; 22. Threaded sleeve; 23. Threaded rod; 24. Rotating shaft; 25. Pressing plate; 26. Third stop cover; 27. U-shaped plate; 28. Warning sticker; 29. ​​Arc-shaped protrusion; 30. Anti-slip groove. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0035] Reference Figure 1-7As shown, an embodiment of the utility model is: a 35Kv single-core cable anti-breakdown device for power transmission, comprising a shell 1, a base 2 is welded to the bottom end of the outer wall on both sides of the shell 1, a first sleeve 3 is vertically penetrated at both ends of the base 2, the height of the first sleeve 3 is greater than the height of the base 2, the bottom surface of the first sleeve 3 and the bottom surface of the base 2 are arranged on the same horizontal plane, a pressing shaft 4 is sleeved on the inner wall of the first sleeve 3, and a plug 5 is welded to the bottom of the pressing shaft 4. By hammering the pressing shaft 4, the plug 5 can be quickly inserted into the ground, so as to prevent the plug 5 from being damaged. The entire anti-penetration device is fixed, and multiple sets of convex rings 6 are fixedly connected to the outer wall of the insertion rod 5. By setting multiple sets of convex rings 6, the contact area between the insertion rod 5 structure and the soil can be expanded, thereby further improving the stability of the entire insertion rod 5 structure. The top end of the outer wall of the first sleeve 3 is threadedly connected with a first stop cover 7, and the top end of the outer wall of the first sleeve 3 and the inner wall of the first stop cover 7 are both provided with threads. By setting a connecting structure between the first sleeve 3 and the first stop cover 7, the pressing shaft 4 can be fixed in the first sleeve 3, thereby preventing the insertion rod 5 from sliding upward.

[0036] A bottom plate 8 is passed through the center of the bottom of the shell 1, and a first insulating rubber sleeve 9 is vertically passed through both ends of the bottom plate 8. A placement frame 10 is welded at the outer edge of the top of the bottom plate 8. A cavity is opened inside the placement frame 10 and runs through it from top to bottom. A cable intermediate joint 11 is sleeved on the top of the inner wall of the placement frame 10. Both ends of the bottom of the cable intermediate joint 11 are fixedly connected to grounding terminals 12. The outer walls of the grounding terminals 12 are sleeved with the inner walls of the first insulating rubber sleeve 9. By setting a connection structure between the first insulating rubber sleeve 9 and the grounding terminal 12, it is beneficial to improve the connection between the grounding terminal 12 and the grounding terminal 12. The sealing of the anti-breakdown device connection structure prevents groundwater from flowing into the anti-breakdown device. The cable body 13 is fixedly connected to the center of the outer walls on both sides of the cable intermediate joint 11, and the second insulating rubber sleeve 14 is horizontally penetrated at the center of both sides of the inner wall of the shell 1. The outer wall of the cable body 13 is sleeved with the inner wall of the second insulating rubber sleeve 14. By setting the connection structure between the cable body 13 and the second insulating rubber sleeve 14, it is beneficial to improve the sealing of the connection structure between the cable body 13 and the anti-breakdown device, thereby preventing groundwater from flowing into the anti-breakdown device.

[0037] Both ends of the top of the cable intermediate joint 11 are fixedly connected to the arrester 15, both ends of the top of the shell 1 are fixedly connected to the plug shaft 16, the outer wall of the plug shaft 16 is sleeved with the second sleeve 17, the outer wall of the second sleeve 17 is fixedly connected to the top cover 18, the bottom end of the inner wall of the top cover 18 is bonded with a rubber ring 19, a square groove is opened at the center of the bottom of the top cover 18, the outer wall of the rubber ring 19 is connected to the inner wall of the groove, both ends of the top of the top cover 18 are opened with vertical perforations, the perforations and the grooves are interconnected, the inner wall of the perforations is connected to the bottom end of the outer wall of the second sleeve 17, the outer wall of the plug shaft 16 can be vertically inserted into the second sleeve 17, and the inner wall of the rubber ring 19 is connected to the outer wall of the shell 1 The top end is sleeved, and a connecting structure between the rubber ring 19 and the shell 1 is provided, which is beneficial to improving the sealing of the connecting part between the top cover 18 and the shell 1. The inner wall at the top center of the plug shaft 16 is threadedly connected with a bolt 20, and a threaded hole is opened at the top center of the plug shaft 16, which is connected to the threaded part of the bolt 20. The top end of the outer wall of the second sleeve 17 is sleeved with a second stop cover 21. By providing a connecting structure between the second sleeve 17 and the second stop cover 21, the connecting structure between the plug shaft 16 and the bolt 20 can be covered, and the groundwater can be blocked at the same time, thereby further slowing down the rusting speed of the connecting structure between the bolt 20 and the plug shaft 16.

[0038] A threaded sleeve 22 is vertically penetrated at the center of the top of the top cover 18, and a threaded rod 23 is threadedly connected to the inner wall of the threaded sleeve 22. A rotating shaft 24 is rotatably connected to the bottom of the threaded rod 23, and a pressing plate 25 is fixedly connected to the bottom of the rotating shaft 24. When the threaded rod 23 is rotated, the threaded rod 23 can move up and down on the inner wall of the threaded sleeve 22. When the threaded rod 23 moves downward, the pressing plate 25 can be tightly pressed on the top surface of the cable intermediate joint 11, thereby fixing the cable intermediate joint 11 in the placement frame 10. The top of the outer wall of the threaded sleeve 22 is threadedly connected to the third stopper 26, and the top of the outer wall of the threaded sleeve 22 and the inner wall of the third stopper 26 are connected to each other. They are all provided with threads. By setting a connecting structure between the third blocking cover 26 and the threaded sleeve 22, it is beneficial to improve the stability of the threaded rod 23 on the inner wall of the threaded sleeve 22, thereby preventing the threaded rod 23 from sliding upward. U-shaped plates 27 are welded at the front and rear ends of the top of the top cover 18, and a warning sticker 28 is adhered to the top of the outer wall of the U-shaped plate 27. By setting the warning sticker 28, pedestrians or vehicles can be warned. An arc-shaped protrusion 29 is welded on the top of the U-shaped plate 27, and a plurality of groups of anti-slip grooves 30 are provided on the top of the arc-shaped protrusion 29. By setting the anti-slip grooves 30, when pedestrians accidentally step on the top surface of the arc-shaped protrusion 29, pedestrians can be prevented from slipping.

[0039] 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 device for preventing breakdown of a 35KV single-core cable for power transmission, comprising a housing (1), characterized in that: The bottom center of the shell (1) is penetrated by a bottom plate (8), and first insulating rubber sleeves (9) are vertically penetrated at both ends of the bottom plate (8). A placement frame (10) is welded at the outer edge of the top of the bottom plate (8), and a cable intermediate joint (11) is sleeved on the top of the inner wall of the placement frame (10). Both ends of the bottom of the cable intermediate joint (11) are fixedly connected to grounding terminals (12), and the outer walls of the grounding terminals (12) are sleeved on the inner wall of the first insulating rubber sleeve (9). The outer walls on both sides of the cable intermediate joint (11) are A cable body (13) is fixedly connected at the center, a second insulating rubber sleeve (14) is horizontally penetrated at the center of both sides of the inner wall of the shell (1), the outer wall of the cable body (13) is sleeved with the inner wall of the second insulating rubber sleeve (14), a rubber ring (19) is sleeved at the top end of the outer wall of the shell (1), a top cover (18) is bonded to the outer wall of the rubber ring (19), a U-shaped plate (27) is welded at the front and rear ends of the top of the top cover (18), and a warning sticker (28) is bonded to the top end of the outer wall of the U-shaped plate (27).

2. The device for preventing breakdown of a 35Kv single-core cable for power transmission according to claim 1 is characterized in that: Bases (2) are welded to the bottom ends of the outer walls on both sides of the shell (1), first sleeves (3) vertically penetrate through both ends of the base (2), and a pressing shaft (4) is sleeved on the inner wall of the first sleeve (3).

3. The device for preventing breakdown of a 35Kv single-core cable for power transmission according to claim 2 is characterized in that: The bottom of the pressing shaft (4) is welded with an insertion rod (5), the outer wall of the insertion rod (5) is fixedly connected with multiple groups of convex rings (6), and the top of the outer wall of the first sleeve (3) is threadedly connected with a first stop cover (7).

4. The device for preventing breakdown of a 35Kv single-core cable for power transmission according to claim 1 is characterized in that: Both ends of the top of the cable intermediate joint (11) are fixedly connected to a lightning arrester (15), both ends of the top of the shell (1) are fixedly connected to an insertion shaft (16), both ends of the top of the top cover (18) are vertically penetrated by a second sleeve (17), and the outer wall of the insertion shaft (16) is sleeved with the bottom end of the inner wall of the second sleeve (17).

5. The device for preventing breakdown of a 35Kv single-core cable for power transmission according to claim 4 is characterized in that: The inner wall at the top center of the insertion shaft (16) is threadedly connected with a bolt (20), and the top end of the outer wall of the second sleeve (17) is sleeved with a second stop cover (21). The insertion shaft (16), the second sleeve (17), the bolt (20) and the second stop cover (21) are each provided in two groups.

6. The device for preventing breakdown of a 35Kv single-core cable for power transmission according to claim 1 is characterized in that: A threaded sleeve (22) vertically penetrates the center of the top of the top cover (18); a threaded rod (23) is threadedly connected to the inner wall of the threaded sleeve (22); a rotating shaft (24) is rotatably connected to the bottom of the threaded rod (23); a pressing plate (25) is fixedly connected to the bottom of the rotating shaft (24); and a third stopper (26) is threadedly connected to the top of the outer wall of the threaded sleeve (22).

7. The device for preventing breakdown of a 35Kv single-core cable for power transmission according to claim 1 is characterized in that: An arc-shaped protrusion (29) is welded on the top of the U-shaped plate (27), and a plurality of groups of anti-slip grooves (30) are formed on the top of the arc-shaped protrusion (29).

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