Composite sleeve with protection function

Abstract

The utility model discloses a composite sleeve with a protection function, which comprises an insulating tube body, a conductive core is arranged in the insulating tube body, and the insulating tube body consists of a first insulating tube and a second insulating tube; a first sealing end cover and a second sealing end cover are arranged at the two ends of the first insulating sleeve and the second insulating sleeve respectively, and the first sealing end cover and the second sealing end cover are fixedly connected with the two ends of the conductive core respectively. According to the utility model, through the design of the first insulating sleeve and the second insulating sleeve, the insulating performance and weather resistance of the composite sleeve are effectively improved, and especially at the transition position of the outdoor environment and the indoor environment, the overall protection capability is enhanced through a special connection structure; the first sealing end cover and the second sealing end cover are used for sealing and fixing, so that the connection strength between the conductive core and the sleeve is enhanced, the problems of conductivity reduction and corrosion possibly caused by a traditional welding mode are avoided, the conductive efficiency is improved, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of composite casings, in particular to a composite casing with a protective function. Background Art

[0002] In recent years, society's demand for electricity has skyrocketed, leading to a significant increase in the number of indoor substations and distribution rooms. Their stable and reliable operation has become a critical link in ensuring power supply continuity. However, incidents where lightning overvoltage intrudes into substations or distribution rooms via overhead distribution lines, causing damage to equipment insulation, are common. Such incidents not only result in economic losses due to equipment damage, but also pose a serious threat to public safety due to power outages. Composite bushings, a wall-penetrating bushing that combines innovation and practicality, utilize cutting-edge insulation materials for their inner insulation and a high-temperature vulcanized silicone rubber sheath for their outer insulation. This design imparts excellent stain resistance, shock resistance, and explosion-proof properties, perfectly aligning with the power industry's pursuit of oil-free and miniaturized development trends.

[0003] However, existing composite bushing designs still have some significant flaws. Specifically, the terminals at both ends of the conductive rod, used to connect to high-voltage cables, are often exposed and lack necessary protection. This design makes the connection between the composite bushing and the external line relatively fragile, significantly compromising safety and increasing potential safety hazards. Furthermore, the terminals and conductive rods are often connected by welding. While seemingly stable in the short term, over long-term use, the terminals are susceptible to rain erosion, leading to performance degradation. Furthermore, oxidation can gradually weaken their electrical conductivity, affecting the normal operation of the entire system.

[0004] In summary, in response to these problems existing in the existing composite bushing design, we urgently need a more complete composite bushing design scheme with stronger protection capabilities to ensure the safe and stable operation of the power system. Summary of the Invention

[0005] The purpose of the present invention is to provide a composite casing with a protective function to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a composite casing with a protective function, comprising an insulating tube body, wherein a conductive core is provided inside the insulating tube body; the insulating tube body is composed of a first insulating casing and a second insulating casing, wherein the first insulating casing is arranged outdoors, and the second insulating casing is arranged indoors; the first insulating casing and the second insulating casing are fixedly connected end to end, wherein the outer wall of the first insulating casing is provided with a first silicone umbrella sleeve, and the outer wall of the second insulating casing is provided with a second silicone umbrella sleeve; the two ends of the conductive core respectively pass through the first insulating casing and the second insulating casing and extend outward, wherein the conductive core is close to the first insulating casing. A first fixing screw is provided at one end of an insulating sleeve, and a second fixing screw is provided at one end of the conductive core close to the second insulating sleeve; a first sealing end cover and a second sealing end cover are respectively provided at both ends of the first insulating sleeve and the second insulating sleeve, wherein the first sealing end cover and the second sealing end cover are respectively fixedly connected to the two ends of the conductive core; a connecting seat is provided at one end of the first insulating sleeve close to the second insulating sleeve, wherein a connecting plate is provided at the end of the second insulating sleeve, and the connecting seat is fixedly connected to the connecting plate; an annular limiting groove is provided at the front end of the connecting seat, wherein the connecting plate is arranged in the annular limiting groove, and the inner diameter of the annular limiting groove is equivalent to the diameter of the connecting plate.

[0007] Preferably, a first terminal block is fixedly mounted on the cap of the first sealing end cover, wherein a threaded hole is also provided on the cap of the first sealing end cover; the threaded hole is adapted to the first fixing screw, wherein the first fixing screw is fixedly connected to the first sealing end cover through a nut, and the pins of the first terminal block are connected to the conductive core.

[0008] Preferably, the first sealing end cover is provided with a first sealing ring on the side close to the first insulating sleeve, wherein the outer diameter of the first sealing ring is equivalent to the inner diameter of the tube cavity of the first insulating sleeve; the first sealing ring is arranged inside the first insulating sleeve, wherein the inner wall of the tube cavity of the first insulating sleeve is provided with a rubber pad.

[0009] Preferably, the inner diameter of the first sealing ring is equivalent to the diameter of the conductive core, wherein a first spring is provided at one end of the conductive core close to the first sealing ring; one end of the first spring is fixedly connected to the conductive core, wherein the other end of the first spring abuts against the bottom wall of the first sealing ring.

[0010] Preferably, a second terminal block is fixedly mounted on the cap of the second sealed end cover, wherein a threaded hole is also provided on the cap of the second sealed end cover; the threaded hole is adapted to the second fixing screw, wherein the second fixing screw is fixedly connected to the second sealed end cover through a nut, and the pins of the second terminal block are connected to the conductive core.

[0011] Preferably, the second sealing end cover is provided with a second sealing ring on the side close to the second insulating sleeve, wherein the outer diameter of the second sealing ring is equivalent to the inner diameter of the tube cavity of the second insulating sleeve; the second sealing ring is arranged inside the second insulating sleeve, wherein the inner wall of the tube cavity of the second insulating sleeve is provided with a rubber pad.

[0012] Preferably, the inner diameter of the second sealing ring is equivalent to the diameter of the conductive core, wherein a second spring is provided at one end of the conductive core close to the second sealing ring; one end of the second spring is fixedly connected to the conductive core, wherein the other end of the second spring abuts against the bottom wall of the second sealing ring.

[0013] Preferably, a plurality of elastic cards are provided along the circumferential ring of the rear end of the connecting seat, wherein one end of the elastic card is fixed to the connecting seat and the other end of the elastic card is provided with an upwardly protruding card head.

[0014] Preferably, a positioning slot is provided on one side of the connecting seat, wherein a positioning block is provided in the positioning slot.

[0015] Preferably, a plurality of screws are provided on the connecting plate, wherein a plurality of screw holes corresponding to the screws are opened in the annular limiting groove, and the screws pass through the connecting plate and are threadedly connected to the screw holes.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention effectively improves the insulation performance and weather resistance of the composite sleeve by designing the first insulating sleeve and the second insulating sleeve, and equipping them with the first silicone umbrella cover and the second silicone umbrella cover respectively, especially at the transition between outdoor and indoor environments, the overall protection capability is enhanced by the special connection structure, and the influence of the external environment on the internal conductive core is reduced; the first fixing screw and the second fixing screw are respectively fixed to the two ends of the conductive core, and are sealed and fixed by the first sealing end cover and the second sealing end cover. This design not only enhances the connection strength between the conductive core and the sleeve, but also prevents the intrusion of external factors such as moisture and dust through the sealing structure, thereby improving the safety and operational stability of the equipment; the first sealing ring and the second sealing ring are introduced into the first sealing end cover and the second sealing end cover, and the use of rubber pads further improves the sealing effect, and at the same time The arrangement of the first spring and the second spring effectively alleviates the stress in the conductive core caused by thermal expansion and contraction or external force, thereby enhancing the shockproof performance of the structure; the design of the connecting seat and the connecting plate, combined with the annular limit groove and screw fixing method, makes the connection between the first insulating sleeve and the second insulating sleeve both firm and easy to disassemble, providing convenience for installation and maintenance; in addition, the design of the elastic card and the card head, as well as the cooperation of the positioning card slot and the positioning card block, further enhance the stability of the connection and the convenience of installation; directly connecting with the conductive core through the first terminal block and the second terminal block avoids the problems of conductivity degradation and corrosion caused by traditional welding methods, thereby improving the conductivity efficiency and the service life of the equipment; effectively solves the shortcomings of the existing composite sleeve in terms of protection, connection stability, sealing, installation convenience and conductivity, and provides a more reliable guarantee for the safe and stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure explosion of the utility model;

[0019] Figure 3 This is a structural diagram of the connection between the first insulating sleeve and the connecting seat of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the second insulating sleeve of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the conductive core of the utility model.

[0022] Among them: 1. Insulating tube body; 101. First insulating sleeve; 102. Second insulating sleeve; 103. First silicone umbrella cover; 104. Second silicone umbrella cover; 2. Conductive core; 3. First fixing screw; 4. Second fixing screw; 5. First sealing end cover; 6. Second sealing end cover; 7. Connecting seat; 8. Connecting plate; 9. Annular limiting groove; 10. First terminal block; 11. First sealing ring; 12. Rubber pad; 13. First spring; 14. Second terminal block; 15. Second sealing ring; 16. Second spring; 17. Elastic card; 18. Card head; 19. Positioning slot; 20. Positioning block; 21. Screw; 22. Screw hole. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below with reference to the accompanying drawings.

[0024] Please refer to Figures 1 to 5 To achieve the above objectives, the present invention provides the following technical solutions:

[0025] A composite casing with a protective function, comprising an insulating tube body 1, wherein a conductive core 2 is provided in the insulating tube body 1; the insulating tube body 1 is composed of a first insulating casing 101 and a second insulating casing 102, wherein the first insulating casing 101 is arranged outdoors, and the second insulating casing 102 is arranged indoors; the first insulating casing 101 and the second insulating casing 102 are fixedly connected end to end, wherein the outer wall of the first insulating casing 101 is provided with a first silicone umbrella sleeve 103, and the outer wall of the second insulating casing 102 is provided with a second silicone umbrella sleeve 104; the two ends of the conductive core 2 respectively pass through the first insulating casing 101 and the second insulating casing 102 and extend outward, wherein the conductive core 2 is close to one end of the first insulating casing 101. A first fixing screw 3 is provided, and a second fixing screw 4 is provided at one end of the conductive core 2 close to the second insulating sleeve 102; a first sealing end cover 5 and a second sealing end cover 6 are respectively provided at both ends of the first insulating sleeve 101 and the second insulating sleeve 102, wherein the first sealing end cover 5 and the second sealing end cover 6 are respectively fixedly connected to the two ends of the conductive core 2; a connecting seat 7 is provided at one end of the first insulating sleeve 101 close to the second insulating sleeve 102, wherein a connecting plate 8 is provided at the end of the second insulating sleeve 102, and the connecting seat 7 is fixedly connected to the connecting plate 8; an annular limiting groove 9 is provided at the front end of the connecting seat 7, wherein the connecting plate 8 is arranged in the annular limiting groove 9, and the inner diameter of the annular limiting groove 9 is equivalent to the diameter of the connecting plate 8.

[0026] The first insulating sleeve 101 and the second insulating sleeve 102 provide necessary electrical insulation to prevent current leakage to the surrounding environment, ensuring the safety of power transmission; the first silicone umbrella cover 103 and the second silicone umbrella cover 104 are respectively arranged on the outer walls of the first insulating sleeve 101 and the second insulating sleeve 102, which increase the anti-fouling, waterproof and weather-resistant properties of the sleeve and improve the stability and life of the composite sleeve in different environments; the conductive core 2 runs through the entire insulating tube body 1 and extends outward at both ends for connecting the power supply and the load; the first fixing screw 3 and the second fixing screw 4 are respectively arranged at one end of the conductive core 2 close to the first insulating sleeve 101 and the second insulating sleeve 102; the first sealing end cover 5 and the second sealing end cover 6 are respectively arranged at both ends of the insulating tube body 1 and fixedly connected to the conductive core 2. Ensure the sealing of the inside of the insulating tube body 1 to prevent moisture, dust and other harmful substances from entering; a connecting seat 7 is provided at one end of the first insulating sleeve 101 close to the second insulating sleeve 102, and a connecting plate 8 is provided at the end of the second insulating sleeve 102. The two are fixedly connected to ensure a firm connection between the first insulating sleeve 101 and the second insulating sleeve 102, while providing additional structural strength and stability; an annular limiting groove 9 is provided at the front end of the connecting seat 7 to accommodate the connecting plate 8, and by matching the inner diameter with the diameter of the connecting plate 8, precise positioning and limiting between the two are achieved, further enhancing the stability and reliability of the connection; it provides multiple functions such as electrical insulation, anti-fouling and waterproofing, sealing and fixing, ensuring the safety and stability of power transmission, and is suitable for various indoor and outdoor power transmission and distribution systems.

[0027] Please refer to Figure 2 、 Figure 3 As an embodiment of the present invention, a first terminal block 10 is fixedly mounted on the cap of the first sealing end cover 5, wherein the cap of the first sealing end cover 5 is further provided with a threaded hole; the threaded hole is adapted to the first fixing screw 3, wherein the first fixing screw 3 is fixedly connected to the first sealing end cover 5 through a nut, and the pins of the first terminal block 10 are connected to the conductive core 2; a first sealing ring 11 is provided on the side of the first sealing end cover 5 close to the first insulating sleeve 101, wherein the outer diameter of the first sealing ring 11 is equivalent to the inner diameter of the tube cavity of the first insulating sleeve 101; the first sealing ring 11 is arranged inside the first insulating sleeve 101, wherein the inner wall of the tube cavity of the first insulating sleeve 101 is provided with a rubber pad 12.

[0028] In the above-mentioned scheme, a first terminal block 10 is fixedly mounted on the cap of the first sealing end cover 5, wherein the first terminal block 10 is used to make electrical connections with external electrical equipment; pins are provided on the first terminal block 10, which are directly connected to the conductive core 2 through an internal connection structure, thereby ensuring smooth transmission of current; threaded holes are also provided on the cap of the first sealing end cover 5, which are adapted to the first fixing screw 3; the first fixing screw 3 passes through the conductive core 2 and extends into the threaded hole of the first sealing end cover 5, and is then fixedly connected to the first sealing end cover 5 through a nut. This design not only provides mechanical fixation between the conductive core 2 and the first sealing end cover 5, but also enhances the stability and reliability of the connection through threaded connection; a first sealing ring 11 is provided on the side of the first sealing end cover 5 close to the first insulating sleeve 101, wherein the first sealing ring 11 plays a key sealing role; the outer diameter of the first sealing ring 11 is comparable to the inner diameter of the lumen of the first insulating sleeve 101, thereby ensuring that the first sealing ring 11 can be tightly fixed It fits tightly on the inner wall of the tube cavity of the first insulating sleeve 101; when the first sealing end cover 5 is connected to the first insulating sleeve 101, the first sealing ring 11 is compressed and tightly pressed on the rubber pad 12 on the inner wall of the tube cavity, forming an effective sealing structure, preventing moisture, dust and other harmful substances from entering the interior of the insulating sleeve from the connection; the rubber pad 12 arranged around the inner wall of the tube cavity of the first insulating sleeve 101 plays an auxiliary sealing role, and the rubber pad 12 has good elasticity and sealing performance. When the first sealing ring 11 is compressed and pressed on the rubber pad 12, the two together form a more reliable sealing structure. This design not only improves the sealing effect, but also enhances the moisture-proof and dust-proof ability of the interior of the insulating sleeve; the first sealing end cover 5 and its related components realize the electrical connection, mechanical fixation and sealing function of the conductive core 2 and the external power equipment and the interior of the insulating sleeve through careful design and structural arrangement. These functions jointly ensure the safety and stability of the composite sleeve during power transmission.

[0029] Please refer to Figure 2 、 Figure 5 As an embodiment of the present invention, the inner diameter of the first sealing ring 11 is equivalent to the diameter of the conductive core 2, wherein the conductive core 2 is provided with a first spring 13 at one end close to the first sealing ring 11; one end of the first spring 13 is fixedly connected to the conductive core 2, wherein the other end of the first spring 13 abuts against the bottom wall of the first sealing ring 11.

[0030] In the above-mentioned scheme, the first sealing ring 11 is designed to have an inner diameter equivalent to the diameter of the conductive core 2, which means that when the conductive core 2 passes through the first sealing ring 11, the two can fit tightly together; this tight fit helps to prevent current from leaking to the outside of the first insulating sleeve 101, and also provides a stable support structure for the conductive core 2; by arranging a first spring 13 at one end of the conductive core 2 close to the first sealing ring 11, wherein one end of the first spring 13 is fixedly connected to the conductive core 2, and the other end is in contact with the bottom wall of the first sealing ring 11; this design enables the first spring 13 to play a buffering role between the conductive core 2 and the first sealing ring 11, reducing the friction and wear between the conductive core 2 and the first sealing ring 11 that may be caused by thermal expansion and contraction or external forces; at the same time, the first spring 13 also provides additional fixing force, ensuring the stable position of the conductive core 2 in the first sealing ring 11, and preventing loosening or displacement caused by vibration or impact; due to the presence of the first spring 13, the conductive core 2 The connection between the core 2 and the first sealing ring 11 has a certain dynamic adaptability; when the conductive core 2 produces a slight deformation due to temperature changes or current passing through, the first spring 13 can absorb these deformations, thereby maintaining a tight fit between the conductive core 2 and the first sealing ring 11; this dynamic adaptability not only improves the stability of the connection, but also helps to extend the service life of the composite bushing; the tight fit between the first sealing ring 11 and the first spring 13 also forms an effective barrier to prevent harmful substances such as moisture and dust from invading through the gap between the conductive core 2 and the insulating bushing; this is crucial to maintaining the insulation performance and electrical safety of the first insulating bushing 101; the first sealing ring 11, the first spring 13 and the conductive core 2 jointly ensure the safety and stability of the composite bushing during power transmission through tight fit, buffering and fixing effects, dynamic adaptability and prevention of moisture and dust intrusion; not only improves the performance of the composite bushing, but also provides reliable protection for its application in various harsh environments.

[0031] Please refer to Figure 2 、 Figure 4 As an embodiment of the present invention, a second terminal block 14 is fixedly mounted on the cover cap of the second sealing end cover 6, wherein a threaded hole is further provided on the cover cap of the second sealing end cover 6; the threaded hole is adapted to the second fixing screw 4, wherein the second fixing screw 4 is fixedly connected to the second sealing end cover 6 through a nut, and the pins of the second terminal block 14 are connected to the conductive core 2; a second sealing ring 15 is provided on the side of the second sealing end cover 6 close to the second insulating sleeve 102, wherein the outer diameter of the second sealing ring 15 is equivalent to the inner diameter of the tube cavity of the second insulating sleeve 102; the second sealing ring 15 is arranged inside the second insulating sleeve 102, wherein the inner wall of the tube cavity of the second insulating sleeve 102 is provided with a rubber pad 12.

[0032] In the above-mentioned scheme, a second terminal block 14 is fixedly mounted on the cap of the second sealing end cover 6, wherein the second terminal block 14 is used to electrically connect to indoor electrical equipment or loads; the second terminal block 14 is provided with pins, which are directly connected to the other end of the conductive core 2 through an internal connection structure, ensuring smooth transmission of current; this design enables the composite bushing to be easily integrated with the indoor power system to realize the transmission and distribution of electrical energy; a threaded hole is also provided on the cap of the second sealing end cover 6, wherein the threaded hole is adapted to the second fixing screw 4, the second fixing screw 4 passes through the threaded hole of the second sealing end cover 6, and is then fixedly connected to the second sealing end cover 6 through a nut; this fixing method not only provides mechanical fixation between the conductive core 2 and the second sealing end cover 6, but also enhances the stability and reliability of the connection through the threaded connection; thereby ensuring that the position of the conductive core 2 in the composite bushing is stable, and preventing loosening or displacement caused by vibration or impact; a second sealing ring 15 is provided on the side of the second sealing end cover 6 close to the second insulating sleeve 102, and the second sealing ring 15 is provided on the side of the second sealing end cover 6 close to the second insulating sleeve 102. The sealing ring 15 plays a key sealing role. The outer diameter of the second sealing ring 15 is equivalent to the inner diameter of the second insulating sleeve 102, ensuring that the second sealing ring 15 can fit tightly on the inner wall of the second insulating sleeve 102. When the second sealing end cap 6 is connected to the second insulating sleeve 102, the second sealing ring 15 is compressed and tightly pressed on the rubber pad 12 on the inner wall of the lumen, forming an effective sealing structure. This sealing structure prevents moisture, dust and other harmful substances from entering the second insulating sleeve 102 from the connection. The second insulating sleeve 102 is kept dry and clean; a rubber pad 12 is provided on the inner wall of the lumen of the second insulating sleeve 102, wherein the rubber pad 12 plays an auxiliary sealing role and has good elasticity and sealing performance. When the second sealing ring 15 is compressed and pressed on the rubber pad 12, the two together form a more reliable sealing structure; this design not only improves the sealing effect, but also enhances the moisture-proof and dust-proof capabilities of the interior of the insulating sleeve, ensuring the long-term stable operation of the composite sleeve in harsh environments.

[0033] Please refer to Figure 2 、 Figure 5 As an embodiment of the present invention, the inner diameter of the second sealing ring 15 is equivalent to the diameter of the conductive core 2, wherein the conductive core 2 is provided with a second spring 16 at one end close to the second sealing ring 15; one end of the second spring 16 is fixedly connected to the conductive core 2, wherein the other end of the second spring 16 abuts against the bottom wall of the second sealing ring 15.

[0034] In the above-mentioned scheme, the second sealing ring 15 is designed to have an inner diameter equivalent to the diameter of the conductive core 2, which means that when the conductive core 2 passes through the second sealing ring 15, the two can fit tightly together; this tight fit helps to prevent current from leaking to the outside of the second insulating sleeve 102, and also provides a stable support structure for the conductive core 2; the provision of the second sealing ring 15 ensures the sealing of the composite sleeve at the indoor port, and prevents the intrusion of harmful substances such as moisture and dust; a second spring 16 is provided at one end of the conductive core 2 close to the second sealing ring 15, wherein one end of the second spring 16 is fixedly connected to the conductive core 2, and the other end of the second spring 16 abuts against the bottom wall of the second sealing ring 15; this design enables the second spring 16 to act as a buffer between the conductive core 2 and the second sealing ring 15, reducing the friction and wear between the conductive core 2 and the second sealing ring 15 that may be caused by thermal expansion and contraction or external forces. At the same time, the second spring 16 also provides additional fixing force, ensuring the stable position of the conductive core 2 in the second sealing ring 15, and preventing loosening or displacement due to vibration or impact; due to the presence of the second spring 16, the connection between the conductive core 2 and the second sealing ring 15 has a certain dynamic adaptability; when the conductive core 2 produces slight deformation due to temperature changes or current passing through, the second spring 16 can absorb these deformations, thereby maintaining a close fit between the conductive core 2 and the second sealing ring 15; this dynamic adaptability not only improves the stability of the connection, but also helps to extend the service life of the composite sleeve; the second sealing ring 15 and its related components ensure the safety and stability of the composite sleeve at the indoor port through close fit, buffering and fixing effects, dynamic adaptability, and prevention of moisture and dust intrusion. These functions not only improve the performance of the composite sleeve, but also provide reliable protection for its application in various indoor environments.

[0035] Please refer to Figure 3 、 Figure 4 As an embodiment of the present invention, a plurality of elastic cards 17 are provided along the circumferential ring at the rear end of the connecting seat 7, wherein one end of the elastic card 17 is fixedly connected to the connecting seat 7, and the other end of the elastic card 17 is provided with an upwardly protruding card head 18; a positioning card slot 19 is opened on one side of the connecting seat 7, wherein a positioning card block 20 is provided in the positioning card slot 19.

[0036] In the above-described scheme, a plurality of elastic clips 17 are provided along the circumferential ring of the rear end of the connecting seat 7, wherein the elastic clips 17 are designed to have a certain elasticity and restoring force; one end of the elastic clip 17 is connected to the fixed connecting piece of the connecting seat 7 to ensure a firm connection between them; the other end of the elastic clip 17 is provided with an upwardly protruding clip 18, which is used to engage or lock with the wall to prevent it from falling off or loosening, so as to achieve a firm connection; a positioning slot 19 is provided on one side of the connecting seat 7, which is designed to match a positioning block 20 of a specific shape; when the connecting plate 8 is inserted into the connecting seat 7, the positioning block 20 will first enter the positioning slot 19 and move along the track of the slot until it reaches a predetermined locking position; once the positioning block 20 reaches the locking position, the positioning block 20 will interact with the end and side wall of the positioning slot 19, thereby preventing the connecting plate 8 from further moving or rotating. This interaction ensures the accurate positioning and firm connection of the connecting plate 8 on the connecting seat 7.

[0037] Please refer to Figures 2 to 4 As an embodiment of the present invention, a plurality of screws 21 are provided on the connecting plate 8, wherein a plurality of screw holes 22 corresponding to the screws 21 are opened in the annular limiting groove 9, and the screws 21 pass through the connecting plate 8 and are threadedly connected to the screw holes 22.

[0038] In the above-described scheme, the connecting plate 8 is a flat structure used to connect, support or fix the second insulating sleeve 102. The connecting plate 8 is usually made of a strong and durable material such as metal or plastic; a plurality of screws 21 are provided on the connecting plate 8, and these screws 21 are used to fix the connecting plate 8 to the connecting seat 7; a plurality of screw holes 22 corresponding to the screws 21 are opened in the annular limit groove 9, and the position and size of the screw holes 22 are carefully designed to ensure that the screws 21 can accurately pass through the connecting plate 8 and be fixed to the components in the annular limit groove 9. This threaded connection provides a strong fixing force, can resist external pressure and vibration, and ensure the stability and reliability between the connecting plate 8 and the connecting seat 7.

[0039] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A composite bushing with a protective function, comprising an insulating tube body (1), wherein a conductive core (2) is provided in the insulating tube body (1); characterized in that: The insulating tube body (1) is composed of a first insulating sleeve (101) and a second insulating sleeve (102), wherein the first insulating sleeve (101) is arranged outdoors, and the second insulating sleeve (102) is arranged indoors; the first insulating sleeve (101) and the second insulating sleeve (102) are fixedly connected end to end, wherein the outer wall of the first insulating sleeve (101) is provided with a first silicone umbrella sleeve (103), and the outer wall of the second insulating sleeve (102) is provided with a second silicone umbrella sleeve (104); the two ends of the conductive core (2) respectively pass through the first insulating sleeve (101) and the second insulating sleeve (102) and extend outward, wherein the end of the conductive core (2) close to the first insulating sleeve (101) is provided with a first fixing screw (3), and the conductive core (2) close to the second insulating sleeve A second fixing screw (4) is provided at one end of the tube (102); a first sealing end cover (5) and a second sealing end cover (6) are provided at both ends of the first insulating sleeve (101) and the second insulating sleeve (102), respectively, wherein the first sealing end cover (5) and the second sealing end cover (6) are fixedly connected to both ends of the conductive core (2); a connecting seat (7) is provided at one end of the first insulating sleeve (101) close to the second insulating sleeve (102), wherein a connecting plate (8) is provided at the end of the second insulating sleeve (102), and the connecting seat (7) is fixedly connected to the connecting plate (8); an annular limiting groove (9) is provided at the front end of the connecting seat (7), wherein the connecting plate (8) is arranged in the annular limiting groove (9), and the inner diameter of the annular limiting groove (9) is equivalent to the diameter of the connecting plate (8).

2. The composite casing with protective function according to claim 1, characterized in that: A first terminal block (10) is fixedly mounted on the cap of the first sealing end cover (5), wherein the cap of the first sealing end cover (5) is also provided with a threaded hole; the threaded hole is adapted to fit the first fixing screw (3), wherein the first fixing screw (3) is fixedly connected to the first sealing end cover (5) via a nut, and the pins of the first terminal block (10) are connected to the conductive core (2).

3. The composite casing with protective function according to claim 2, characterized in that: The first sealing end cover (5) is provided with a first sealing ring (11) on one side close to the first insulating sleeve (101), wherein the outer diameter of the first sealing ring (11) is equivalent to the inner diameter of the tube cavity of the first insulating sleeve (101); the first sealing ring (11) is arranged inside the first insulating sleeve (101), wherein the inner wall of the tube cavity of the first insulating sleeve (101) is provided with a rubber pad (12).

4. The composite casing with protective function according to claim 3, characterized in that: The inner diameter of the first sealing ring (11) is equivalent to the diameter of the conductive core (2), wherein a first spring (13) is provided at one end of the conductive core (2) close to the first sealing ring (11); one end of the first spring (13) is fixedly connected to the conductive core (2), wherein the other end of the first spring (13) abuts against the bottom wall of the first sealing ring (11).

5. The composite casing with protective function according to claim 1, characterized in that: A second terminal block (14) is fixedly mounted on the cap of the second sealing end cover (6), wherein the cap of the second sealing end cover (6) is also provided with a threaded hole; the threaded hole is adapted to fit the second fixing screw (4), wherein the second fixing screw (4) is fixedly connected to the second sealing end cover (6) via a nut, and the pins of the second terminal block (14) are connected to the conductive core (2).

6. The composite casing with protective function according to claim 5, characterized in that: The second sealing end cover (6) is provided with a second sealing ring (15) on the side close to the second insulating sleeve (102), wherein the outer diameter of the second sealing ring (15) is equivalent to the inner diameter of the tube cavity of the second insulating sleeve (102); the second sealing ring (15) is arranged inside the second insulating sleeve (102), wherein the inner wall of the tube cavity of the second insulating sleeve (102) is provided with a rubber pad (12).

7. The composite casing with protective function according to claim 6, characterized in that: The inner diameter of the second sealing ring (15) is equivalent to the diameter of the conductive core (2), wherein a second spring (16) is provided at one end of the conductive core (2) close to the second sealing ring (15); one end of the second spring (16) is fixedly connected to the conductive core (2), wherein the other end of the second spring (16) abuts against the bottom wall of the second sealing ring (15).

8. The composite casing with protective function according to claim 1, characterized in that: The rear end of the connecting seat (7) is provided with a plurality of elastic cards (17) along its circumferential ring, wherein one end of the elastic card (17) is fixedly connected to the connecting seat (7), and the other end of the elastic card (17) is provided with an upwardly protruding card head (18).

9. The composite casing with protective function according to claim 8, characterized in that: A positioning slot (19) is provided on one side of the connecting seat (7), wherein a positioning block (20) is provided in the positioning slot (19).

10. The composite casing with protective function according to claim 1, characterized in that: The connecting plate (8) is provided with a plurality of screws (21), wherein a plurality of screw holes corresponding to the screws (21) are opened in the annular limiting groove (9), and the screws (21) pass through the connecting plate (8) and are threadedly connected to the screw holes (22).

Images