An insulating joint and method of operation thereof

Abstract

The application discloses an insulation joint and a working method thereof, which comprises a main insulation head and a vice insulation head in screwing butt joint, an inner thread joint is rotationally installed on one end of the main insulation head close to the vice insulation head, an outer thread joint for screwing cooperation with the inner thread joint is integrally formed on one end of the vice insulation head close to the main insulation head, and an annular lip is integrally formed on the outer circumferential surface of the outer thread joint. The application can accurately adjust the fixing strength of the joint according to the outer diameter of the cable, realizes the close combination with the end of the cable, enhances the mechanical connection strength between the joint and the cable, ensures that the end of the cable is not easy to be loosened or displaced in the long-term use, and the multi-claw type cable tightening assembly increases the friction between the joint and the cable through the uniformly distributed gripping force, effectively avoids the connection loosening problem caused by vibration, stretching or external force.

Description

Technical Field

[0001] This invention relates to the field of cable joint technology, specifically to an insulating joint and its working method. Background Technology

[0002] Insulating joints, used for connecting and protecting the opposite ends of cables, primarily ensure electrical safety and physical protection at cable connections, preventing external environmental influences on the cables and guaranteeing the stable operation of the power system. Their core functions include providing sufficient insulation strength to prevent current leakage or poor electrical contact; waterproofing and moisture-proofing to prevent moisture from entering the joint and causing short circuits or electrical faults. Structurally, insulating joints typically consist of multiple functional layers. First, there is the conductive part, usually made of conductive materials such as copper or aluminum, responsible for current transmission; then comes the insulation layer, usually made of materials such as rubber or plastic, ensuring electrical isolation and preventing leakage; next is the waterproof layer, which uses special waterproof materials or a sealed structure (such as heat-shrink tubing) to prevent moisture from entering the joint, ensuring the joint is not affected by moisture over a long period; in addition, there is a reinforcing protective layer, such as a metal or rigid plastic shell, to resist external mechanical impacts and ensure the stability and safety of the joint.

[0003] An insulating connector disclosed in authorization announcement number CN221861973U includes: a fixing mechanism, the fixing mechanism including a right fixing ring, an insulating tube disposed on the inner ring of the right fixing ring, a left fixing ring disposed on the end of the insulating tube away from the right fixing ring, an insulating pad disposed on the end of the insulating tube near the right fixing ring, movable grooves being formed on both sides of the outer surface of the right fixing ring, fixing members disposed on the inner walls of both movable grooves, two return springs disposed on the side of both fixing members near the right fixing ring, and a locking post disposed on the end of both fixing members away from the movable groove. Through the installed fixing mechanism, the operator only needs to gently pry open the fixing members to disengage the locking post from the limiting groove. In this way, the two insulating joints can be easily separated without requiring workers to spend extra time and effort to disassemble them. However, the joints in the above-mentioned technical solution are mainly located at the joint of the two cables during use. Due to the certain tolerance range in the production process, even cables of the same model may have different outer diameters. Therefore, in order to ensure that the joint can adapt to cables with different outer diameters, the insulating joint is designed to have a certain degree of looseness. This ensures that it can be used for cables produced by different batches or different manufacturers, avoiding unusability due to inconsistent outer diameters. This directly leads to the difference between the inner diameter of the insulating joint and the outer diameter of the cable, resulting in a gap between the joint and the cable. This causes the fit between the inner wall of the joint and the outer wall of the cable to be insufficient, and the joint may loosen during use. Especially when the cable is subjected to external forces such as mechanical vibration, tension, or torsion, a loose joint is more likely to cause poor contact or deterioration of electrical performance, which may lead to cable leakage, short circuits, and other accidents, affecting the normal use of the cable. Summary of the Invention

[0004] The purpose of this invention is to provide an insulating connector and its working method. Both the main insulating head and the auxiliary insulating head are securely fixed to the ends of the cables to be connected via a multi-claw radial cable tightening assembly, bringing the two cable ends close together until the main and auxiliary insulating heads are securely threaded together. After the main and auxiliary insulating heads are screwed into place, the elastic tongue pin at the end of the main insulating head enters the insertion groove at the end of the auxiliary insulating head. Finally, the elastic tongue pin is locked using a screw-type pin positioning structure on the auxiliary insulating head, thus completing the fixing operation of the main and auxiliary insulating heads and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an insulating joint, comprising:

[0006] The main insulating head and the auxiliary insulating head are screwed together. The end of the main insulating head near the auxiliary insulating head is rotatably installed with an internal threaded connector. The end of the auxiliary insulating head near the main insulating head is integrally formed with an external threaded connector for screwing with the internal threaded connector. The outer circumferential surface of the external threaded connector is integrally formed with an annular lip. The ends of the main insulating head and the auxiliary insulating head that are far apart are provided with a multi-claw type radial cable tightening assembly for connecting with the cable.

[0007] The elastic tongue pin is disposed on the outer wall of one end of the internal threaded joint. The outer wall of the annular lip near the external threaded joint is provided with a insertion groove for the elastic tongue pin to enter. The arc-shaped outer wall of the annular lip is provided with a screw-type pin positioning structure for locking the elastic tongue pin. The screw-type pin positioning structure is used to mechanically lock the elastic tongue pin after it enters the insertion groove.

[0008] Preferably, a sealing element is provided on the outer wall of the opposite side of the internal threaded connector and the annular lip, and the contact surfaces of the internal threaded connector and the annular lip are sealed together by the sealing element.

[0009] Preferably, the sealing element includes a circular groove on one side of the outer wall of the internal threaded joint and a sealing ring fixed on one side of the outer wall of the annular lip. Two elastic tongue pins are provided, and the two elastic tongue pins are symmetrical about the central axis of the main insulating head. The outer diameter of the circular groove is smaller than the distance between the two elastic tongue pins.

[0010] Preferably, the multi-claw radial cable tightening assembly includes an outer sleeve integrally formed at one end of the main insulation head, an inner central sleeve integrally formed at the center of the inner sleeve, a bevel gear disk rotatably mounted on the outer circumference of the inner central sleeve, and a plurality of I-shaped sliders slidably mounted at equal intervals on the inner wall of the outer sleeve. The outer wall of the bevel gear disk away from the main insulation head is provided with a planar thread, and the outer wall of the I-shaped slider near the inner central sleeve is provided with a rectangular rib that cooperates with the planar thread. An arc-shaped clamping plate is fixed on the outer wall of the I-shaped slider away from the inner central sleeve. The multi-claw radial cable tightening assembly also includes an active bevel gear rotatably mounted on the outer wall of the inner central sleeve. The active bevel gear and the bevel gear disk mesh with each other. The inner central sleeve and the main insulation head are concentric, and the inner diameter of the inner central sleeve is less than or equal to the inner diameter of the internal threaded joint.

[0011] Preferably, the outer wall of the outer sleeve is provided with a hollow groove for the sliding of the I-shaped slider, and the outer wall of the end of the active bevel gear away from the central axis of the outer sleeve is provided with a square concave hole.

[0012] Preferably, an annular dovetail groove is provided on the outer wall of the inner central sleeve, and an annular dovetail edge is provided on the inner wall of the bevel gear disk to rotatably engage with the annular dovetail groove.

[0013] Preferably, the elastic tongue pin includes a concave cavity disposed in the planar wall of the internal threaded joint, a tongue pin unit slidably installed inside the concave cavity, and a ring fixed on one side of the inner wall of the concave cavity. A helical spring is fixed inside the ring, one end of the helical spring extends into the interior of the tongue pin unit, a positioning hole extending downward through one side of the top of the tongue pin unit is provided, a rectangular concave portion is provided on one side of the outer wall of the tongue pin unit, one end of the helical spring extends into the interior of the rectangular concave portion and is fixedly connected to the tongue pin unit, and the concave cavity is located outside the outer diameter of the circular groove.

[0014] Preferably, the screw-type pin positioning structure includes an external threaded post fixed on the arc-shaped wall of the annular lip, an annular retaining edge integrally formed at one end of the external threaded post, a pin unit slidably installed at the center position inside the annular retaining edge, and an internal threaded cap threaded to the outer circumference of the external threaded post. The top of the internal threaded cap abuts against the top of the pin unit. The outer circumference of the pin unit is integrally formed with a tapered retaining edge. A second spring coaxial with the pin unit is installed at the bottom of the external threaded post. The top of the second spring abuts against the bottom of the tapered retaining edge. After the tongue pin unit is inserted into the insertion groove, the positioning hole and the central axis of the pin unit coincide. The outer diameter of the tapered retaining edge is larger than the inner diameter of the annular retaining edge.

[0015] Preferably, the annular lip is provided with a pin hole for the pin rod to move down and enter the positioning hole.

[0016] The present invention also provides a method for operating an insulating joint, as described above, comprising the following steps:

[0017] S101: The outer insulation layer of the opposite ends of the two cables to be connected needs to be stripped to expose the conductor parts to be connected, so that the conductor parts of the two cables are tightly wrapped together in a spiral shape, and finally several layers of tape are wrapped around the conductor parts of the connection for protection.

[0018] S102: Prepare the main insulation head and the auxiliary insulation head respectively. The cable end to be connected is then installed in the multi-claw radial cable tightening assembly. At this time, the ends of the main insulation head and the auxiliary insulation head that are far apart are connected to the cable through the multi-claw radial cable tightening assembly. Manually tighten the internal thread connector to gradually align and tighten the internal thread connector and the external thread connector until the connection is completely tightened to form a firm connection. When tightening, the cable end is firmly fixed between the two insulation heads by the multi-claw radial cable tightening assembly.

[0019] S103: After the main insulating head and the auxiliary insulating head are screwed into place, the elastic tongue pin at the end of the main insulating head enters the insertion groove at the end of the auxiliary insulating head;

[0020] S104: To further ensure a secure connection between the main insulation head and the secondary insulation head, a screw-type pin positioning structure is designed on the secondary insulation head. This structure uses a rotating pin to lock the inserted elastic tongue pin. When the screw-type pin positioning structure is rotated to the appropriate position, the pin will mechanically engage with the elastic tongue pin, further enhancing the fixing effect of the secondary insulation head. Thus, the main insulation head, the secondary insulation head, and the cable end are firmly fixed together through multiple mechanisms.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: This insulating joint and its working method, through the precise screwing and matching of the main insulating head and the auxiliary insulating head, combined with the structural design of the multi-claw radial cable tightening assembly, provides an effective and stable cable connection solution. The design of the multi-claw radial cable tightening assembly can precisely adjust the fixing force of the joint according to the outer diameter of the cable, so as to achieve a tight connection with the cable end. This method not only enhances the mechanical connection strength between the joint and the cable, but also ensures that the cable end is not easy to loosen or shift during long-term use. In addition, the multi-claw cable tightening assembly increases the friction between the joint and the cable through the uniformly distributed clamping force, effectively avoiding the connection loosening problem that may be caused by vibration, tension or external force. Especially in high load or dynamic environment, it provides a more stable electrical connection. Furthermore, the multi-claw radial cable tightening assembly also precisely adapts to the outer diameter of the cable, so that the joint can still be firmly fixed when facing cables of different specifications or different production batches, so that the joint can maintain high compatibility in various applications and reduce the installation difficulties caused by cable specification mismatch.

[0022] The engagement of the elastic tongue pin at the end of the main insulator head with the insertion slot of the secondary insulator head, along with the screw-type pin positioning structure on the secondary insulator head, further enhances the fixing and locking functions of the main and secondary insulator heads. This design, through the locking action of the elastic tongue pin, can firmly fix the joint after screwing, preventing it from loosening during use. The screw-type pin positioning structure provides additional mechanical locking after rotation installation, ensuring that the main and secondary insulator heads will not experience any accidental loosening or displacement under vibration or external force, thereby guaranteeing long-term connection stability and electrical performance reliability. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0025] Figure 3 This is a three-dimensional structural diagram of the main insulating head and the auxiliary insulating head in the docking state of the present invention. Figure 1 ;

[0026] Figure 4This is a three-dimensional structural diagram of the main insulating head and the auxiliary insulating head in the docking state of the present invention. Figure 2 ;

[0027] Figure 5 This is a schematic diagram of the main insulating head and the auxiliary insulating head in the docking state of the present invention.

[0028] Figure 6 This is a three-dimensional structural diagram of the main insulating head and the auxiliary insulating head in the docking state of the present invention. Figure 3 ;

[0029] Figure 7 This is a three-dimensional structural diagram of Embodiment 2 of the present invention;

[0030] Figure 8 This is a three-dimensional cross-sectional view of the multi-claw radial cable tensioning assembly according to Embodiment 2 of the present invention;

[0031] Figure 9 This is a three-dimensional cross-sectional view of the internal threaded connector according to Embodiment 3 of the present invention;

[0032] Figure 10 This is a schematic diagram of the three-dimensional structure of the elastic tongue pin according to Embodiment 3 of the present invention;

[0033] Figure 11 This is a three-dimensional cross-sectional view of the secondary insulating head according to Embodiment 4 of the present invention;

[0034] Figure 12 This is a three-dimensional cross-sectional schematic diagram of the screw-type pin positioning structure according to Embodiment 4 of the present invention.

[0035] In the diagram: 1. Main insulator head; 2. Secondary insulator head; 3. Internal threaded connector; 301. Circular groove; 4. External threaded connector; 5. Multi-claw type radial cable tightening assembly; 501. Outer sleeve; 5011. Hollowed-out groove; 502. Inner center sleeve; 5021. Annular dovetail groove; 503. Bevel gear disk; 5031. Annular dovetail edge; 504. I-shaped slider; 505. Rectangular rib; 506. Arc-shaped clamping plate; 507. Drive bevel gear; 5071. Square concave groove 6. Hole; 7. Concave cavity; 8. Elastic tongue pin; 9. Ring sleeve; 10. Helical spring; 11. Tongue pin unit; 12. Positioning hole; 13. Rectangular concave part; 14. Annular lip; 15. Sealing ring; 16. Pin hole; 17. Insertion groove; 18. Twisted pin positioning structure; 19. External thread post; 1002. Internal thread cap; 1003. Pin unit; 1004. Annular retaining edge; 1005. Conical retaining edge; 1006. Second spring. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] Example 1, by Figures 1 to 6 The present invention includes a main insulating head 1 and a secondary insulating head 2 that are screwed together. An internal threaded connector 3 is rotatably installed at one end of the main insulating head 1 near the secondary insulating head 2. An external threaded connector 4 for screwing into the internal threaded connector 3 is integrally formed at one end of the secondary insulating head 2 near the main insulating head 1. An annular lip 8 is integrally formed on the outer peripheral surface of the external threaded connector 4. A multi-claw type radial cable tightening assembly 5 for connecting to a cable is provided at the ends of the main insulating head 1 and the secondary insulating head 2 that are far apart from each other.

[0038] After the main insulating head 1 and the auxiliary insulating head 2 are connected to the cable end through the multi-claw radial cable tightening assembly 5, the auxiliary insulating head 2, the external threaded connector 4, and the annular lip 8 move towards the internal threaded connector 3 until the internal threaded connector 3 and the external threaded connector 4 are threaded together. At this time, the operator continuously rotates the internal threaded connector 3, causing the internal threaded connector 3 to rotate around the center line of the main insulating head 1. Then, the internal threaded connector 3 continuously tightens the external threaded connector 4 until the two are screwed together and a firm connection is formed. Through the screw-type connection method, the operator can easily complete the docking and fixing of the main and auxiliary insulating heads without using too much external force or complicated tools.

[0039] The elastic tongue pin 7 is set on the outer wall of one end of the internal threaded joint 3. The outer wall of the annular lip 8 near the external threaded joint 4 is provided with a insertion groove 9 for the elastic tongue pin 7 to enter. The arc-shaped outer wall of the annular lip 8 is provided with a screw-type pin positioning structure 10 for locking the elastic tongue pin 7. The screw-type pin positioning structure 10 is used to mechanically lock the elastic tongue pin 7 after it enters the insertion groove 9.

[0040] A sealing element is provided on the outer wall of the internal threaded connector 3 and the annular lip 8 on opposite sides. The contact surfaces of the internal threaded connector 3 and the annular lip 8 are sealed together by the sealing element. The sealing element includes a circular groove 301 provided on the outer wall of the internal threaded connector 3 and a sealing ring 801 fixed on the outer wall of the annular lip 8. Two elastic tongue pins 7 are provided. The two elastic tongue pins 7 are symmetrical about the central axis of the main insulating head 1. The outer diameter of the circular groove 301 is smaller than the distance between the two elastic tongue pins 7. After the internal threaded connector 3 and the external threaded connector 4 are connected, the sealing ring 801 on the outer wall of the annular lip 8 away from the multi-claw radial cable tightening assembly 5 will be embedded into the circular groove 301. As the internal threaded connector 3 and the external threaded connector 4 are tightened, the sealing ring 801 will be squeezed and deformed to form a sealing layer on the contact surface of the annular lip 8 and the internal threaded connector 3. This can effectively fill the small gaps between the internal threaded connector 3 and the annular lip 8 and prevent the penetration of liquids, gases or other external contaminants.

[0041] Insulating joints are often affected by external factors such as vibration and temperature changes. The elasticity of the sealing ring 801 allows it to adapt to deformation and pressure changes within a certain range, thus maintaining sealing performance under vibration or temperature fluctuations. The design of the circular groove 301 helps to stabilize and fix the sealing ring 801, making it less likely to shift when faced with external disturbances, and maintaining a long-term stable sealing effect.

[0042] This embodiment provides a method for operating an insulating joint, as described above, comprising the following steps:

[0043] S101: The outer insulation layer of the opposite ends of the two cables to be connected needs to be stripped to expose the conductor parts to be connected, so that the conductor parts of the two cables are tightly wrapped together in a spiral shape, and finally several layers of tape are wrapped around the conductor parts of the connection for protection.

[0044] S102: Prepare the main insulation head 1 and the auxiliary insulation head 2 respectively. The cable end to be connected is installed in the multi-claw radial cable tightening assembly 5. At this time, the ends of the main insulation head 1 and the auxiliary insulation head 2 that are far apart are connected to the cable through the multi-claw radial cable tightening assembly 5. Manually screw the internal thread connector 3 to gradually align and tighten the internal thread connector 3 and the external thread connector 4 until the connection is completely tightened to form a firm connection. When screwing, the cable end is firmly fixed between the two insulation heads by the multi-claw radial cable tightening assembly 5.

[0045] S103: After the main insulating head 1 and the auxiliary insulating head 2 are screwed into place, the elastic tongue pin 7 at the end of the main insulating head 1 enters the insertion groove 9 at the end of the auxiliary insulating head 2.

[0046] S104: To further ensure a secure connection between the main insulating head 1 and the secondary insulating head 2, a screw-type pin positioning structure 10 is designed on the secondary insulating head 2. This structure uses a rotating pin to lock the inserted elastic tongue pin 7. When the screw-type pin positioning structure 10 is rotated to the appropriate position, the pin will mechanically engage with the elastic tongue pin 7, further enhancing the fixing effect of the secondary insulating head 2. Thus, the main insulating head 1, the secondary insulating head 2, and the cable end are firmly fixed together through multiple mechanisms.

[0047] Example 2, based on Example 1, is... Figure 7 and Figure 8 The multi-claw type radial cable tensioning assembly 5 includes an outer sleeve 501 integrally formed at one end of the main insulation head 1, an inner center sleeve 502 integrally formed at the center position inside the outer sleeve 501, a bevel gear disk 503 rotatably mounted on the outer circumferential surface of the inner center sleeve 502, and a plurality of I-shaped sliders 504 slidably mounted at equal intervals on the inner wall of the outer sleeve 501. The outer wall of the bevel gear disk 503 away from the main insulation head 1 is provided with a planar thread, and the I-shaped sliders 504 are close to the inner center sleeve 502. A rectangular rib 505 that mates with the planar thread is provided on one side of the outer wall of the I-shaped slider 504. An arc-shaped clamping plate 506 is fixed on the outer wall of the slider 504 away from the inner center sleeve 502. The multi-claw type radial cable tightening assembly 5 also includes an active bevel gear 507 that is rotatably installed on the outer wall of the inner center sleeve 502. The active bevel gear 507 and the bevel gear disk 503 mesh with each other. The inner center sleeve 502 and the main insulating head 1 are concentric. The inner diameter of the inner center sleeve 502 is less than or equal to the inner diameter of the internal threaded joint 3.

[0048] When the main insulating head 1 and the auxiliary insulating head 2 are fastened to the cable end via the multi-claw radial cable tightening assembly 5, the operator places the main insulating head 1 and outer sleeve 501 or the auxiliary insulating head 2 and outer sleeve 501 onto the cable end and adjusts the position of the main insulating head 1 and outer sleeve 501. Then, the user takes out a torque wrench and uses the torque wrench and the square concave hole 5071 to rotate the driving bevel gear 507. The driving bevel gear 507 then drives the bevel gear disk 503 to rotate. Since the bottom end of the I-shaped slider 504 is connected to the planar thread on the outer wall of the bevel gear disk 503 via the rectangular rib 505... When the bevel gear disk 503 rotates, it drives each I-shaped slider 504 to move closer to or away from the central axis of the outer sleeve 501 through the planar thread. That is, the I-shaped slider 504 can drive the arc-shaped clamping plate 506 to move closer to the outer wall of the cable until multiple arc-shaped clamping plates 506 are pressed against the outer wall of the cable at the same time, so as to distribute the clamping force evenly to the outside of the cable. Since multiple arc-shaped clamping plates 506 are distributed around the cable, the gripping force on the cable can be improved, which is especially suitable for occasions with high tensile strength requirements. Thus, the fastening force of multiple arc-shaped clamping plates 506 reduces the risk of joint slippage.

[0049] The outer wall of the outer tube 501 is provided with a hollow groove 5011 for the sliding of the I-shaped slider 504. The hollow groove 5011 on the outer wall of the outer tube 501 provides guidance for the sliding of the I-shaped slider 504, so that the I-shaped slider 504 and the arc-shaped plate 506 can stably approach or move away from the cable. The outer wall of the end of the active bevel gear 507 away from the central axis of the outer tube 501 is provided with a square concave hole 5071.

[0050] When the bevel gear disk 503 drives multiple I-shaped sliders 504 and arc-shaped clamping plates 506 to move together, it has a large range of adaptability and can adapt to cables of different diameters. Even if the cable size changes slightly, the cable tightening assembly can still provide sufficient tightening force and stability.

[0051] An annular dovetail groove 5021 is provided on the outer wall of the inner center sleeve 502, and an annular dovetail edge 5031 is provided on the inner wall of the bevel gear disk 503, which rotates and engages with the annular dovetail groove 5021. During the process of the bevel gear disk 503 being driven to rotate by the active bevel gear 507, the annular dovetail edge 5031 on the inner wall of the bevel gear disk 503 rotates and engages with the annular dovetail groove 5021 on the outer wall of the inner center sleeve 502. The annular dovetail edge 5031 and the annular dovetail groove 5021 enable the bevel gear disk 503 to rotate stably.

[0052] Example 3, based on Example 2, by Figure 9 and Figure 10 The elastic tongue pin 7 includes a concave cavity 6 disposed in the planar wall of the internal threaded joint 3, a tongue pin unit 703 slidably installed inside the concave cavity 6, and a ring 701 fixed on one side of the inner wall of the concave cavity 6. A helical spring 702 is fixed inside the ring 701. One end of the helical spring 702 extends into the interior of the tongue pin unit 703. A positioning hole 704 extending downward through one side of the top of the tongue pin unit 703 is provided. A rectangular concave portion 705 is provided on one side of the outer wall of the tongue pin unit 703. One end of the helical spring 702 extends into the interior of the rectangular concave portion 705 and is fixedly connected to the tongue pin unit 703. The rectangular concave portion 705 inside the tongue pin unit 703 allows one end of the helical spring 702 to enter, thereby increasing the amount of action of the helical spring 702.

[0053] The concave cavity 6 is located outside the outer diameter of the circular groove 301. During the screwing and mating of the internal threaded connector 3 and the external threaded connector 4, the tongue pin 703 will first contact the outer wall of the annular lip 8. As the internal threaded connector 3 and the external threaded connector 4 are screwed, the tongue pin 703 will be pressed into the concave cavity 6. At this time, the helical spring 702 is in a compressed state. When the internal threaded connector 3 and the external threaded connector 4 are screwed into place, the tongue pin 703 will encounter the insertion groove 9. Then the helical spring 702 will restore its deformation, so that the tongue pin 703 is pushed into the insertion groove 9. Then the positioning hole 704 and the pin hole 802 are in a concentric state. At this time, the internal threaded connector 3 and the external threaded connector 4 are mated. The insertion and mating of the tongue pin 703 and the insertion groove 9 can also prevent the internal threaded connector 3 and the external threaded connector 4 from rotating or loosening.

[0054] Example 4, based on Example 3, by Figure 11 and Figure 12 The screw-type pin positioning structure 10 includes an externally threaded post 1001 fixed on the arc-shaped wall of the annular lip 8, an annular retaining edge 1004 integrally formed at one end of the externally threaded post 1001, a pin unit 1003 slidably installed at the center position inside the annular retaining edge 1004, and an internally threaded cap 1002 threadedly engaged on the outer circumferential surface of the externally threaded post 1001. The top of the internally threaded cap 1002 abuts against the top of the pin unit 1003. A tapered retaining edge 1005 is integrally formed on the outer circumferential surface of the pin unit 1003. A second spring 1006 coaxial with the pin unit 1003 is installed at the bottom of the externally threaded post 1001. The top of the second spring 1006 abuts against the bottom of the tapered retaining edge 1005. After the tongue pin unit 703 is inserted into the insertion groove 9, the positioning hole 704 and the pin unit 1003 are connected. The central axes of the two parts coincide. The outer diameter of the tapered flange 1005 is larger than the inner diameter of the annular flange 1004. The annular lip 8 is provided with a pin hole 802 for the pin rod unit 1003 to move down and enter the positioning hole 704. When the positioning hole 704 and the pin hole 802 are concentric, the operator can manually rotate the internal thread cap 1002 to make the internal thread cap 1002 rotate down. The internal thread cap 1002 drives the pin rod unit 1003 and the tapered flange 1005 to move down. At this time, the second spring 1006 is in a compressed state until the bottom end of the pin rod unit 1003 enters the positioning hole 704 through the pin hole 802. The downward-moving pin rod unit 1003 locks the tongue pin unit 703 to ensure that the pin rod unit 1003 will not loosen or fall off on its own under external vibration or impact, thus increasing the reliability of the connection.

[0055] Compared with other fixing methods that require special tools or equipment, the screw-type pin positioning structure 10 is very easy to operate. The locking work can be completed by simply rotating the helical spring 702 manually or with a simple tool. The operation is convenient and efficient, and it can be reused without replacing the pin each time.

[0056] In this embodiment, the operator first needs to ensure all components are intact and clean. The outer insulation layer of the two cables to be connected needs to be stripped from their opposite ends to expose the conductors to be connected. The conductors of the two cables are then tightly wound together in a spiral shape. Finally, several layers of tape are wrapped around the conductors at the connection point for protection. The operator then prepares the main insulating head 1 and the auxiliary insulating head 2. One end of the main insulating head 1 is equipped with an internal thread connector 3, and the auxiliary insulating head 2 is equipped with an external thread connector 4. The ends of the cables to be connected are then inserted into the multi-claw radial cable tightening assembly 5. At this point, the ends of the main insulating head 1 and the auxiliary insulating head 2 that are furthest apart are both connected via the multi-claw... The radial cable tightening assembly 5 is connected to the cable. The cable end is inserted into the inner cavity of the multi-claw radial cable tightening assembly 5. The multi-claw radial cable tightening assembly 5 provides uniform clamping force according to the outer diameter of the cable, ensuring a tight fixation between the cable end and the main insulation head or auxiliary insulation head. The claw-shaped structure of the assembly automatically adjusts the clamping force according to the cable size, ensuring that the cable end is firmly fixed in the assembly through axial centripetal force. This provides stable support for the subsequent connection of the main insulation head 1 and auxiliary insulation head 2. After the main insulation head 1 and auxiliary insulation head 2 are fixed to the cable end, the main insulation head 1 and auxiliary insulation head 2 are connected by a threaded connection. The internal thread connector 3 of the main insulation head 1 and the external thread connector 3 of the auxiliary insulation head 2 are connected by a threaded connection. The heads 4 are matched to ensure a very high precision in the screwing fit. The operator manually screws the internal thread connector 3 to gradually align and tighten the internal thread connector 3 and external thread connector 4 until the connection is fully tightened, forming a firm connection. During screwing, the cable end is firmly fixed between the two insulating heads by the multi-claw radial cable tightening assembly 5, ensuring that the joint will not loosen or misalign. After the main insulating head 1 and the auxiliary insulating head 2 are screwed into place, the elastic tongue pin 7 at the end of the main insulating head 1 enters the insertion groove 9 at the end of the auxiliary insulating head 2. The shape of the annular lip 8 matches the shape of the elastic tongue pin 7, ensuring that the tongue pin is firmly fixed after insertion and will not fall off due to external force or vibration. To ensure a secure connection between the main insulating head 1 and the auxiliary insulating head 2, a screw-type pin positioning structure 10 is designed on the auxiliary insulating head 2. This structure uses a rotating pin to lock the inserted elastic tongue pin 7. When the screw-type pin positioning structure 10 is rotated to the appropriate position, the pin will mechanically engage with the elastic tongue pin 7, further enhancing the fixing effect of the auxiliary insulating head 2. This locking process ensures that the main insulating head 1 and the auxiliary insulating head 2 can still maintain a stable connection even under extreme environmental conditions, without loosening or falling off. Through the above steps, the main insulating head 1, the auxiliary insulating head 2, and the cable end are firmly fixed together through multiple mechanisms, ensuring the sealing and electrical performance of the cable joint.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An insulating joint, characterized in that, include: The main insulating head (1) and the auxiliary insulating head (2) are screwed together. The main insulating head (1) is rotatably installed with an internal threaded connector (3) at one end near the auxiliary insulating head (2). The auxiliary insulating head (2) is integrally formed with an external threaded connector (4) for screwing with the internal threaded connector (3) at one end near the main insulating head (1). The outer circumferential surface of the external threaded connector (4) is integrally formed with an annular lip (8). The ends of the main insulating head (1) and the auxiliary insulating head (2) that are far apart are provided with a multi-claw radial cable tightening assembly (5) for connecting with the cable. The elastic tongue pin (7) is provided on the outer wall of one end of the internal threaded connector (3). The outer wall of the annular lip (8) near the external threaded connector (4) is provided with a insertion groove (9) for the elastic tongue pin (7) to enter. The outer wall of the annular lip (8) is provided with a screw-type pin positioning structure (10) for locking the elastic tongue pin (7). The screw-type pin positioning structure (10) is used to mechanically lock the elastic tongue pin (7) after it enters the insertion groove (9). The multi-claw type radial cable tightening assembly (5) includes an outer sleeve (501) integrally formed on one end of the main insulation head (1), an inner center sleeve (502) integrally formed at the center position inside the outer sleeve (501), a bevel gear disk (503) rotatably mounted on the outer circumference of the inner center sleeve (502), and an outer sleeve (501). 01) Several I-shaped sliders (504) are slidably installed at equal intervals on the inner wall. The outer wall of the bevel gear disk (503) away from the main insulating head (1) is provided with a planar thread. The outer wall of the I-shaped slider (504) near the inner center sleeve (502) is provided with a rectangular rib (505) that cooperates with the planar thread. The outer wall of the I-shaped slider (504) away from the inner center sleeve (502) is fixed with an arc-shaped clamping plate (506). The multi-claw type radial cable tightening assembly (5) also includes an active bevel gear (507) rotatably installed on the outer wall of the inner center sleeve (502). The active bevel gear (507) and the bevel gear disk (503) mesh with each other. The inner center sleeve (502) and the main insulating head (1) are concentric. The inner diameter of the inner center sleeve (502) is less than or equal to the inner diameter of the internal threaded joint (3).

2. An insulating joint according to claim 1, characterized in that: A sealing element is provided on the outer wall of the opposite side of the internal threaded connector (3) and the annular lip (8), and the contact surfaces of the internal threaded connector (3) and the annular lip (8) are sealed together by the sealing element.

3. An insulating joint according to claim 2, characterized in that: The sealing element includes a circular groove (301) on one side of the outer wall of the internal threaded connector (3) and a sealing ring (801) fixed on one side of the outer wall of the annular lip (8). The elastic tongue pin (7) is set to two, and the two elastic tongue pins (7) are symmetrical about the central axis of the main insulating head (1). The outer diameter of the circular groove (301) is smaller than the distance between the two elastic tongue pins (7).

4. An insulating joint according to claim 3, characterized in that: The outer wall of the outer tube (501) is provided with a hollow groove (5011) for the sliding of the I-shaped slider (504), and the outer wall of the active bevel gear (507) away from the central axis of the outer tube (501) is provided with a square concave hole (5071).

5. An insulating joint according to claim 4, characterized in that: The outer wall of the inner center sleeve (502) is provided with an annular dovetail groove (5021), and the inner wall of the bevel gear disk (503) is provided with an annular dovetail edge (5031) that rotates with the annular dovetail groove (5021).

6. An insulating joint according to claim 5, characterized in that: The elastic tongue pin (7) includes an inner cavity (6) set in the plane wall of the internal threaded joint (3), a tongue pin unit (703) slidably installed inside the inner cavity (6), and a ring (701) fixed on one side of the inner wall of the inner cavity (6). A helical spring (702) is fixed inside the ring (701). One end of the helical spring (702) extends into the interior of the tongue pin unit (703). A positioning hole (704) extending downward is provided on one side of the top of the tongue pin unit (703). A rectangular inner recess (705) is provided on one side of the outer wall of the tongue pin unit (703). One end of the helical spring (702) extends into the interior of the rectangular inner recess (705) and is fixedly connected to the tongue pin unit (703). The inner cavity (6) is located outside the outer diameter of the circular groove (301).

7. An insulating joint according to claim 6, characterized in that: The screw-type pin positioning structure (10) includes an external threaded post (1001) fixed on the arc wall of the annular lip (8), an annular retaining edge (1004) integrally formed inside one end of the external threaded post (1001), a pin unit (1003) slidably installed at the center position inside the annular retaining edge (1004), and an internal threaded cap (1002) threadedly engaged on the outer circumferential surface of the external threaded post (1001). The top of the internal threaded cap (1002) abuts against the top of the pin unit (1003). 03) The outer peripheral surface is integrally formed with a tapered flange (1005). The bottom of the external threaded column (1001) is equipped with a second spring (1006) coaxial with the pin rod unit (1003). The top of the second spring (1006) abuts against the bottom of the tapered flange (1005). After the tongue pin unit (703) is inserted into the insertion groove (9), the positioning hole (704) and the central axis of the pin rod unit (1003) coincide with each other. The outer diameter of the tapered flange (1005) is larger than the inner diameter of the annular flange (1004).

8. An insulating joint according to claim 7, characterized in that: The annular lip (8) is provided with a pin hole (802) for the pin rod unit (1003) to move down and enter the positioning hole (704).

9. A method for operating an insulating joint, comprising the insulating joint as described in any one of claims 1-8, characterized in that: Includes the following steps: S101: The outer insulation layer of the opposite ends of the two cables to be connected needs to be stripped to expose the conductor parts to be connected, so that the conductor parts of the two cables are tightly wrapped together in a spiral shape, and finally several layers of tape are wrapped around the conductor parts of the connection for protection. S102: Prepare the main insulation head (1) and the auxiliary insulation head (2) respectively. The cable end to be connected is installed in the multi-claw radial cable tightening assembly (5). At this time, the ends of the main insulation head (1) and the auxiliary insulation head (2) that are far apart are connected to the cable through the multi-claw radial cable tightening assembly (5). Manually screw the internal thread connector (3) to gradually connect and tighten the internal thread connector (3) and the external thread connector (4) until the connection is completely tightened to form a firm connection. When screwing, the cable end is firmly fixed between the two insulation heads by the multi-claw radial cable tightening assembly (5). S103: When the main insulating head (1) and the auxiliary insulating head (2) are screwed into place, the elastic tongue pin (7) at the end of the main insulating head (1) enters the insertion groove (9) at the end of the auxiliary insulating head (2); S104: In order to further ensure the firm connection between the main insulating head (1) and the secondary insulating head (2), a screw-type pin positioning structure (10) is designed on the secondary insulating head (2). This structure locks the inserted elastic tongue pin (7) by a rotating pin. When the screw-type pin positioning structure (10) is rotated to the appropriate position, the pin will mechanically engage with the elastic tongue pin (7), further enhancing the fixing effect of the secondary insulating head (2). Thus, the main insulating head (1), the secondary insulating head (2) and the cable end are firmly fixed together by multiple mechanisms.

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