Insulation shielded line joint fixing device
Patent Information
- Application Number
- CN202521993031.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-17
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-09-17
AI Technical Summary
Traditional line joint fixing devices lack insulation protection, have poor sealing performance, are not adaptable enough, and are prone to loosening and failure in vibration environments, thus failing to meet the high voltage and large capacity requirements of modern power systems.
It adopts a combination design of insulating housing, clamping assembly, sealing cover and locking mechanism. The insulating housing is made of polycarbonate material, the clamping assembly uses elastic claws and spiral guide grooves, the sealing cover and locking mechanism are connected by threads and multiple sealing structures, and the elastic buffer pad provides vibration protection.
It achieves reliable fixing and all-round protection of line joints, improves insulation performance, sealing effect and vibration resistance, adapts to different specifications of joints, and is suitable for harsh outdoor environments.
Smart Images
Figure CN224935350U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of fixing device technology, specifically, it relates to an insulating and protective line connector fixing device. Background Technology
[0002] In power transmission and distribution systems, line joints are critical components connecting different line segments, and their reliability directly affects the safe operation of the entire power system. Traditional line joint fixing devices mainly employ simple mechanical clamping methods, fixing the joint to the supporting structure with bolts or clamps. However, this fixing method has many shortcomings: First, it lacks effective insulation protection measures, making it prone to leakage or short circuits in humid environments; second, its sealing performance is poor, allowing rainwater and dust to easily penetrate the joint, accelerating corrosion and aging; third, the fixing device has poor adaptability, requiring different fixing devices for different joint specifications, increasing maintenance costs; finally, in vibration environments, simple mechanical fixing is prone to loosening, leading to poor contact or even detachment of the joint. As power systems develop towards higher voltage and larger capacity, the protection requirements for line joints are becoming increasingly stringent, and traditional fixing devices can no longer meet the needs of modern power systems. Therefore, developing a line joint fixing device with good insulation performance, good sealing effect, strong adaptability, and excellent vibration resistance is of significant practical importance. Utility Model Content
[0003] In view of this, the present invention provides an insulating and protective line joint fixing device, which solves the technical problems of unstable insulation performance and easy loosening and failure under vibration environment of the existing line joint fixing device.
[0004] This utility model is implemented as follows: This utility model provides an insulating and protective line connector fixing device, comprising: an insulating shell, a clamping assembly, a sealing cover, and a locking mechanism; the insulating shell has a cylindrical structure, and a spiral guide groove is provided on the inner wall of the insulating shell; the clamping assembly includes a clamping seat and elastic claws, the clamping seat is fixedly installed at the bottom center of the insulating shell, and the elastic claws are evenly distributed around the outer periphery of the clamping seat; the sealing cover is threadedly connected to the top opening of the insulating shell; the locking mechanism includes a locking ring and a pressing block, the locking ring is sleeved on the outer periphery of the sealing cover, and the pressing block is fixedly connected to the inner wall of the locking ring; an elastic buffer pad is also provided at the bottom of the insulating shell, and the upper surface of the elastic buffer pad is in contact with the bottom surface of the clamping seat.
[0005] The technical advantages of the insulating protective line connector fixing device provided by this utility model are as follows: The cylindrical structure of the insulating shell and the design of the spiral guide groove on the inner wall achieve precise positioning and guiding of the line connector; the clamping assembly's clamping seat and elastic jaws cooperate to adapt to line connectors of different diameters and provide reliable clamping force; the threaded connection between the sealing cover and the insulating shell ensures the device's sealing performance; the locking mechanism, through the cooperation of the locking ring and the pressing block, enhances the fixing strength of the sealing cover; the elastic buffer pad effectively absorbs vibration and impact, protecting the internal line connector.
[0006] Based on the above technical solution, the insulating and protective line joint fixing device of this utility model can be further improved as follows: The insulating shell is made of polycarbonate material, with an outer diameter of 60-100 mm and an inner diameter of 50-90 mm. The spiral guide groove has a pitch of 10-20 mm and a groove depth of 3-5 mm.
[0007] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the insulating shell made of polycarbonate material has excellent electrical insulation performance and mechanical strength, and can maintain stable insulation performance under high voltage environment; the reasonable size design ensures that the device can accommodate conventional specification line connectors; the pitch and groove depth parameters of the spiral guide groove have been optimized, which can provide good guidance without affecting the structural strength of the shell, thus achieving a balance between functionality and structural strength.
[0008] Furthermore, the number of elastic grippers is 4 to 8, each elastic gripper is an arc-shaped sheet structure, one end of the elastic gripper is connected to the clamping seat through a hinge shaft, and the other end is a free end; the inner surface of the elastic gripper is provided with anti-slip teeth, and the tooth height of the anti-slip teeth is 0.5-1 mm.
[0009] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the number of elastic claws and the arc-shaped plate structure design enable them to evenly distribute the clamping force and avoid local stress concentration; the hinge connection method allows the claws to flexibly adjust the clamping angle to adapt to different sizes of line connectors; the anti-slip teeth on the inner side increase the coefficient of friction, prevent the line connectors from loosening or slipping in a vibration environment, and significantly improve the reliability and stability of the fixation.
[0010] Furthermore, a through hole with a diameter of 20-40 mm is provided at the center of the sealing cover; an annular sealing groove is provided on the lower surface of the sealing cover, and a silicone rubber sealing ring is embedded in the annular sealing groove; the upper surface of the sealing cover has a conical structure with a cone angle of 120-150 degrees.
[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the design of the through hole in the center of the sealing cover allows the wires to pass through while maintaining the sealing of the device; the annular sealing groove, together with the silicone rubber sealing ring, forms a double sealing structure, which effectively prevents moisture and dust from entering the device; the conical upper surface design facilitates the rapid flow of rainwater, avoiding water accumulation and corrosion of the device; and the reasonable cone angle range ensures the best balance between structural strength and drainage effect.
[0012] Furthermore, three to six clamping blocks are evenly distributed on the inner wall of the locking ring, each clamping block having a wedge-shaped structure; the inner side of the clamping block mates with the outer peripheral surface of the sealing cover, and the clamping block is connected to the inner wall of the locking ring by a spring to apply radial pressure to the sealing cover.
[0013] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the combined design of the locking ring and the clamping block realizes the circumferential uniform locking of the sealing cover, avoiding the problem of uneven sealing that may be caused by single-point locking; the radial pressure applied by the wedge-shaped clamping block through the spring can automatically compensate for the gap changes caused by temperature changes or material aging; the uniform distribution of multiple clamping blocks ensures the balance of locking force and extends the service life of the sealing system.
[0014] Furthermore, the elastic buffer pad is made of neoprene rubber, and the elastic buffer pad is disc-shaped with a thickness of 5-10 mm; a positioning hole matching the bottom of the clamping seat is opened at the center of the elastic buffer pad, and concentric annular protrusions are provided around the positioning hole.
[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the elastic buffer pad made of neoprene rubber has excellent weather resistance and elastic recovery performance, and can withstand repeated compression and release for a long time; the central positioning hole ensures the precise alignment of the buffer pad and the clamping seat; the design of concentric annular protrusions increases the deformation space of the buffer pad, improves the buffering effect, and at the same time prevents the lateral displacement of the buffer pad under pressure.
[0016] Furthermore, the free end of the elastic gripper is inwardly curved like a hook, with a radius of curvature of 5-10 mm; the thickness of the elastic gripper gradually decreases from the hinge end to the free end, with a thickness variation range of 3-1 mm.
[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the inward hook-shaped design of the free end of the elastic gripper increases the contact area with the line connector and improves the stability of clamping; the reasonable radius of curvature avoids stress concentration and prevents the gripper from breaking; the thickness gradient design enables the gripper to maintain sufficient strength while having good elasticity, and can adapt to line connectors of different diameters, achieving an optimized balance between rigidity and flexibility.
[0018] Furthermore, the conical upper surface of the sealing cover is provided with radial reinforcing ribs, the number of which is 6 to 12, the height of which is 2-4 mm and the width of which is 3-5 mm.
[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the radial reinforcing ribs on the conical upper surface of the sealing cover significantly improve the structural rigidity of the sealing cover and prevent deformation under the action of locking force; the reasonable arrangement and size design of the reinforcing ribs enhance the structural strength without affecting the drainage performance; the uniform distribution of multiple reinforcing ribs enables the sealing cover to withstand greater axial pressure and improves the load-bearing capacity of the overall device.
[0020] Furthermore, the wedge angle of the clamping block is 15 to 30 degrees, and the inner surface of the clamping block is provided with a transverse corrugated structure, with the height difference between the crest and trough of the corrugation being 0.3-0.8 mm.
[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the wedge angle design of the clamping block enables it to generate a large locking force with a small radial displacement, thereby improving the locking efficiency; the transverse corrugated structure on the inner side increases the friction with the outer surface of the sealing cover, preventing loosening under vibration; the corrugated structure can also accommodate small impurity particles, avoiding locking failure caused by impurities and improving the reliability of the device.
[0022] Furthermore, the elastic buffer pad has 3 to 5 concentric annular protrusions, the distance between adjacent protrusions is 5-8 mm, the height of each protrusion is 1-2 mm, and the cross-section is semi-circular.
[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: multiple concentric annular protrusions on the elastic buffer pad form a multi-level buffer structure, which can provide different degrees of buffering effect according to the load size; the semi-circular cross-section design allows the protrusions to deform uniformly under pressure, avoiding stress concentration; the reasonable protrusion spacing and height parameters ensure the gradual deformation characteristics of the buffer pad during the compression process, achieving the best buffering effect.
[0024] Compared with existing technologies, the beneficial effects of this utility model's insulating protective line joint fixing device are as follows: This utility model achieves reliable fixing and all-round protection of line joints through the synergistic action of the insulating shell, clamping components, sealing cover, locking mechanism, and elastic buffer pad. The insulating shell is made of high-performance polycarbonate material, combined with a spiral guide groove design, which not only provides excellent electrical insulation performance but also achieves precise installation guidance. The elastic claw design of the clamping components allows the device to adapt to line joints of different diameters, and the anti-slip teeth ensure the reliability of clamping. The cooperation between the sealing cover and the locking mechanism forms multiple sealing protections, effectively preventing the intrusion of moisture and dust. The multi-level buffer design of the elastic buffer pad significantly reduces the impact of vibration on the line joint. The entire device has a compact structure, is easy to install, and has strong adaptability. Compared with existing technologies, it has significant improvements in insulation performance, sealing effect, adaptability, and vibration resistance, and is particularly suitable for line joint protection in harsh outdoor environments. Attached Figure Description
[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is an example diagram of an insulating and protective line connector fixing device; Figure 2 A top view of the insulating housing of an insulating protective line connector fixing device; Figure 3 This is an assembly diagram of an insulating and protective line connector fixing device; The attached diagram lists the components represented by each number as follows: 10. Insulating housing; 20. Clamping assembly; 21. Clamping seat; 22. Elastic gripper; 30. Sealing cover; 31. Through hole; 40. Locking mechanism; 41. Locking ring. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0028] like Figures 1-3The diagram shows an example of an insulating protective line connector fixing device provided by this utility model, comprising: an insulating housing 10, a clamping assembly 20, a sealing cover 30, and a locking mechanism 40; the insulating housing 10 has a cylindrical structure, and a spiral guide groove is provided on the inner wall of the insulating housing 10; the clamping assembly 20 includes a clamping seat 21 and elastic claws 22, the clamping seat 21 is fixedly installed at the bottom center of the insulating housing 10, and the elastic claws 22 are evenly distributed around the outer periphery of the clamping seat 21; the sealing cover 30 is threadedly connected to the top opening of the insulating housing 10; the locking mechanism 40 includes a locking ring 41 and a pressing block, the locking ring 41 is sleeved on the outer periphery of the sealing cover 30, and the pressing block is fixedly connected to the inner wall of the locking ring 41; an elastic buffer pad is also provided at the bottom of the insulating housing 10, and the upper surface of the elastic buffer pad is in contact with the bottom surface of the clamping seat 21.
[0029] The specific operation or usage method is as follows: First, place the elastic buffer pad at the bottom of the insulating housing, ensuring the positioning hole of the buffer pad aligns with the bottom of the clamping base. Then, insert the wire connector to be fixed through the opening at the top of the insulating housing, slowly rotating and pressing it down along the spiral guide groove until the connector reaches the clamping assembly position. At this point, the elastic jaws open outwards under the action of the connector; once the connector is fully in the clamping position, the jaws close under their own elasticity, and the anti-slip teeth tightly adhere to the connector surface, achieving reliable clamping. Next, pass the wire connecting the circuit through the through hole in the center of the sealing cover, and then tighten the sealing cover onto the top of the insulating housing using threads, ensuring full contact between the silicone rubber sealing ring in the annular sealing groove and the end face of the housing. Finally, place the locking ring around the outer circumference of the sealing cover, adjust the position of the clamping block so that its wedge-shaped surface tightly fits the outer surface of the sealing cover, and under the action of the spring force, the clamping block applies uniform radial pressure to the sealing cover, completing the entire fixing process. During use, the device can automatically adapt to temperature changes and vibration environments. The elastic buffer pad continuously provides cushioning protection, and the locking mechanism automatically compensates for gaps caused by material aging, ensuring long-term reliable operation.
[0030] In the above technical solution, the insulating shell 10 is made of polycarbonate material, with an outer diameter of 60-100 mm, an inner diameter of 50-90 mm, a pitch of 10-20 mm for the spiral guide groove, and a groove depth of 3-5 mm.
[0031] Furthermore, in the above technical solution, the number of elastic grippers 22 is 4 to 8, each elastic gripper 22 is an arc-shaped sheet structure, one end of the elastic gripper 22 is connected to the clamping seat 21 through a hinge shaft, and the other end is a free end; the inner surface of the elastic gripper 22 is provided with anti-slip teeth, and the tooth height of the anti-slip teeth is 0.5-1 mm.
[0032] Furthermore, in the above technical solution, a through hole 31 is provided at the center of the sealing cover 30, and the diameter of the through hole 31 is 20-40 mm; an annular sealing groove is provided on the lower surface of the sealing cover 30, and a silicone rubber sealing ring is embedded in the annular sealing groove; the upper surface of the sealing cover 30 has a conical structure with a cone angle of 120-150 degrees.
[0033] Furthermore, in the above technical solution, three to six clamping blocks are evenly distributed on the inner wall of the locking ring 41, each clamping block having a wedge-shaped structure; the inner side of the clamping block cooperates with the outer peripheral surface of the sealing cover 30, and the clamping block is connected to the inner wall of the locking ring 41 through a spring, for applying radial pressure to the sealing cover 30.
[0034] Furthermore, in the above technical solution, the elastic buffer pad is made of neoprene rubber material, and the elastic buffer pad is disc-shaped with a thickness of 5-10 mm; a positioning hole matching the bottom of the clamping seat 21 is opened at the center of the elastic buffer pad, and concentric annular protrusions are provided around the positioning hole.
[0035] Furthermore, in the above technical solution, the free end of the elastic gripper 22 is inwardly curved like a hook, and the radius of curvature of the hook-shaped part is 5-10 mm; the thickness of the elastic gripper 22 gradually decreases from the hinge end to the free end, and the thickness varies from 3-1 mm.
[0036] Furthermore, in the above technical solution, the conical upper surface of the sealing cover 30 is provided with radial reinforcing ribs, the number of reinforcing ribs is 6 to 12, the height of the reinforcing ribs is 2-4 mm, and the width is 3-5 mm.
[0037] Furthermore, in the above technical solution, the wedge angle of the clamping block is 15 to 30 degrees, and the inner side of the clamping block is provided with a transverse corrugated structure, with the height difference between the crest and trough of the corrugation being 0.3-0.8 mm.
[0038] Furthermore, in the above technical solution, the elastic cushioning pad has 3 to 5 concentric annular protrusions, the distance between adjacent protrusions is 5-8 mm, the height of each protrusion is 1-2 mm, and the cross-section is semi-circular.
[0039] First Embodiment: In this embodiment, the insulating shell is injection molded from high-strength polycarbonate material, with an outer diameter of 80 mm, an inner diameter of 70 mm, a wall thickness of 5 mm, and a total height of 120 mm. The spiral guide groove on the inner wall of the insulating shell is precision machined with a pitch of 15 mm, a groove depth of 4 mm, a groove width of 6 mm, and a helix angle of 30 degrees. The clamping seat is made of glass fiber reinforced nylon material, is disc-shaped, with a diameter of 60 mm and a thickness of 15 mm, and has a 30 mm diameter through hole in the center to accommodate the line connector. The clamping seat is fixed to the bottom of the insulating shell by four M6 bolts, with bolt holes evenly distributed on a 50 mm diameter circumference. There are six elastic grippers, made of spring steel, each gripper being 40 mm long, 12 mm wide at the root, 8 mm wide at the free end, and its thickness gradually decreasing from 2.5 mm at the root to 1.2 mm at the free end. The anti-slip teeth on the inner side of the grippers are triangular, with a tooth pitch of 1.5 mm, a tooth height of 0.8 mm, and a tooth apex angle of 60 degrees. The sealing cap is made of reinforced ABS material, with an outer diameter of 78 mm, an M78×2 thread specification, and a central through hole diameter of 30 mm. The annular sealing groove on the lower surface of the sealing cap is 4 mm wide and 3 mm deep, with a silicone rubber sealing ring embedded in the groove with a cross-sectional diameter of 3.5 mm. The tapered structure on the upper surface of the sealing cap has a cone angle of 135 degrees and is equipped with 8 radial reinforcing ribs, each rib being 3 mm high, 4 mm wide, and extending 35 mm outward from the center. The locking ring is made of aluminum alloy material, with an inner diameter of 82 mm, an outer diameter of 95 mm, and a height of 25 mm. Four clamping blocks are evenly distributed on the inner wall of the locking ring. Each clamping block is made of polyoxymethylene material, with a wedge angle of 22 degrees, a length of 20 mm, and a width of 15 mm. The clamping block is connected to the inner wall of the locking ring via a stainless steel compression spring with a diameter of 2 mm and a free length of 10 mm. The spring has a pre-compression of 3 mm, providing a preload of approximately 20 Newtons. The transverse corrugations on the inner side of the clamping block are sinusoidal with a wavelength of 2 mm and a height difference of 0.5 mm between the crests and troughs. The elastic buffer pad is made of neoprene rubber with a Shore hardness of 60, a diameter of 65 mm, a thickness of 8 mm, and a central positioning hole diameter of 61 mm. The buffer pad has four concentric annular protrusions with diameters of 20 mm, 30 mm, 40 mm, and 50 mm from the inside out. Each protrusion is 1.5 mm high, has a cross-sectional radius of 0.75 mm, and the spacing between adjacent protrusions is maintained between 6 and 7 mm.
[0040] Second Embodiment: This embodiment is based on the first embodiment, with optimizations and improvements to the clamping assembly and sealing system. In this embodiment, the number of elastic grippers is increased to eight, made of titanium alloy to provide higher elastic modulus and corrosion resistance. The free end of each gripper is designed with a double-hook structure, with the inner hook having a radius of curvature of 6 mm and the outer hook having a radius of curvature of 8 mm, forming a 2 mm gap between the two hooks, capable of simultaneously clamping line connector sheaths of different thicknesses. The anti-slip teeth on the inner side of the grippers are changed to trapezoidal teeth with a tooth pitch of 2 mm, a tooth height of 1 mm, a tooth top width of 0.5 mm, and a tooth bottom width of 1.5 mm. This tooth shape provides a larger contact area and more reliable clamping force. The sealing cap material is upgraded to polyetheretherketone (PEEK), which has higher temperature resistance and chemical stability. The lower surface of the sealing cover features a double-ring sealing groove, with an inner groove diameter of 70 mm and an outer groove diameter of 76 mm. The two grooves form an independent sealing cavity, each containing a sealing ring of different hardness. The inner ring uses fluororubber with a Shore hardness of 70, while the outer ring uses EPDM rubber with a Shore hardness of 50, creating a combined soft and hard sealing system. The number of reinforcing ribs on the upper surface of the sealing cover has been increased to 12, arranged in a spiral pattern. Each reinforcing rib extends radially at a 15-degree helical angle, enhancing both structural strength and drainage performance. The number of clamping blocks for the locking ring has been increased to 6, and a guide pin has been added between each clamping block and the locking ring to ensure that the clamping blocks can only move radially, preventing circumferential displacement. These improvements increase the clamping capacity of the device by 40% and the sealing performance by 60%, making it particularly suitable for harsh working environments with high pressure and high temperature.
[0041] Specifically, the principle of this utility model is as follows: This device achieves all-round protection for the line joint through a multi-layered protection mechanism. The insulating shell forms the first protective barrier; its cylindrical structure and the high insulation performance of the polycarbonate material effectively isolate the external electric field, preventing leakage and short circuits. The spiral guide groove design is based on the principle of spiral motion, making the installation process smoother and more precise. The clamping assembly adopts an elastic claw structure, utilizing the elastic deformation characteristics of the material, and achieving adaptive adjustment of the claw angle through a hinge connection. The anti-slip teeth prevent slippage by increasing the coefficient of friction. The sealing system adopts a multi-seal principle: the threaded connection provides the primary seal, the silicone rubber sealing ring forms the main seal, and the clamping action of the locking mechanism further enhances the sealing effect. The locking mechanism utilizes the wedge self-locking principle, converting radial force into axial locking force through the wedge-shaped surface of the clamping block, and the preload of the spring ensures a continuous and stable locking effect. The elastic buffer pad is based on multi-level buffering theory; the concentric annular protrusions deform sequentially under different loads, achieving a progressive buffering effect, effectively absorbing and dispersing vibration energy, and protecting the line joint from mechanical impact damage.
Claims
1. An insulating and protective line connector fixing device, characterized in that, include: An insulating housing, a clamping assembly, a sealing cap, and a locking mechanism are provided. The insulating housing has a cylindrical structure, and a spiral guide groove is provided on the inner wall of the insulating housing. The clamping assembly includes a clamping seat and elastic claws. The clamping seat is fixedly installed at the bottom center of the insulating housing, and the elastic claws are evenly distributed around the outer periphery of the clamping seat. The sealing cap is threadedly connected to the top opening of the insulating housing. The locking mechanism includes a locking ring and a pressing block. The locking ring is sleeved on the outer periphery of the sealing cap, and the pressing block is fixedly connected to the inner wall of the locking ring. An elastic buffer pad is also provided at the bottom of the insulating housing, and the upper surface of the elastic buffer pad is in contact with the bottom surface of the clamping seat.
2. The insulating and protective line joint fixing device according to claim 1, characterized in that, The insulating shell is made of polycarbonate material, with an outer diameter of 60-100 mm and an inner diameter of 50-90 mm. The pitch of the spiral guide groove is 10-20 mm and the groove depth is 3-5 mm.
3. The insulating and protective line joint fixing device according to claim 2, characterized in that, The number of elastic grippers is 4 to 8, each elastic gripper is an arc-shaped plate structure, one end of the elastic gripper is connected to the clamping seat through a hinge shaft, and the other end is a free end; the inner surface of the elastic gripper is provided with anti-slip teeth, and the tooth height of the anti-slip teeth is 0.5-1 mm.
4. The insulating and protective line joint fixing device according to claim 3, characterized in that, The sealing cap has a through hole at its center, the diameter of which is 20-40 mm; the lower surface of the sealing cap has an annular sealing groove, in which a silicone rubber sealing ring is embedded; the upper surface of the sealing cap has a conical structure with a cone angle of 120-150 degrees.
5. The insulating and protective line joint fixing device according to claim 4, characterized in that, Three to six clamping blocks are evenly distributed on the inner wall of the locking ring, each clamping block having a wedge-shaped structure; the inner side of the clamping block mates with the outer circumferential surface of the sealing cover, and the clamping block is connected to the inner wall of the locking ring by a spring to apply radial pressure to the sealing cover.
6. The insulating and protective line joint fixing device according to claim 5, characterized in that, The elastic buffer pad is made of neoprene rubber and is disc-shaped with a thickness of 5-10 mm. A positioning hole matching the bottom of the clamping seat is provided at the center of the elastic buffer pad, and concentric annular protrusions are provided around the positioning hole.
7. The insulating and protective line joint fixing device according to claim 6, characterized in that, The free end of the elastic gripper is inwardly curved like a hook, with a radius of curvature of 5-10 mm; the thickness of the elastic gripper gradually decreases from the hinge end to the free end, with a thickness variation range of 3-1 mm.
8. The insulating and protective line joint fixing device according to claim 7, characterized in that, The conical upper surface of the sealing cap is provided with radial reinforcing ribs, the number of which is 6 to 12, the height of which is 2-4 mm and the width of which is 3-5 mm.
9. The insulating and protective line joint fixing device according to claim 8, characterized in that, The wedge angle of the clamping block is 15 to 30 degrees, and the inner side of the clamping block is provided with a transverse corrugated structure, with the height difference between the crest and trough of the corrugation being 0.3-0.8 mm.
10. An insulating and protective line joint fixing device according to claim 9, characterized in that, The elastic buffer pad has 3 to 5 concentric annular protrusions, with a spacing of 5-8 mm between adjacent protrusions, a height of 1-2 mm for each protrusion, and a semi-circular cross-section.