Insulated joint and working method thereof

Abstract

The invention discloses an insulating joint and a working method thereof, the insulating joint comprises a main insulating head and an auxiliary insulating head which are in screwing butt joint, one end, close to the auxiliary insulating head, of the main insulating head is rotatably provided with an internal thread joint, and one end, close to the main insulating head, of the auxiliary insulating head is integrally provided with an external thread joint used for being in screwing fit with the internal thread joint; and an annular lip edge is integrally formed on the peripheral surface of the external thread joint. The fixing strength of the connector can be accurately adjusted according to the outer diameter of a cable, tight combination with the end of the cable is achieved, the mechanical connection strength between the connector and the cable is enhanced, it is guaranteed that the end of the cable is not prone to loosening or shifting in the long-term use process, and the service life of the cable is prolonged. And the multi-claw cable tightening assembly enables the friction force between the joint and the cable to be increased through uniformly distributed grasping force, so that the problem of loose connection possibly caused by vibration, stretching or external force is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of cable joints, in particular to an insulating joint and a working method thereof. Background Art

[0002] The main function of the insulating joint used for connecting and protecting the opposite ends of the cable is to ensure the electrical safety and physical protection of the cable connection, avoid the influence of the external environment on the cable, and ensure the stable operation of the power system. Its core functions include providing sufficient insulation strength to prevent current leakage or poor electrical contact; waterproof and moisture-proof to prevent moisture from entering the joint and causing short circuits or electrical failures; structurally, the insulating joint is usually composed of multiple functional levels. First is the conductive part, which is often made of conductive materials such as copper or aluminum and is responsible for the transmission of current; then there is the insulating layer, which is usually made of rubber, plastic and other materials to ensure electrical isolation and prevent leakage; followed by a waterproof layer, which uses special waterproof materials or closed structures (such as heat shrink tubing) to prevent moisture from entering the joint, ensuring that the joint is not affected by moisture for a long time; in addition, there are reinforced protective layers, such as metal or hard plastic shells, to resist external mechanical impact and ensure the stability and safety of the joint;

[0003] For example, an insulating joint disclosed in the authorization announcement number CN221861973U includes: a fixing mechanism, the fixing mechanism includes a right fixing ring, an insulating tube is provided on the inner ring of the right fixing ring, a left fixing ring is provided on the end of the insulating tube away from the right fixing ring, an insulating pad is provided on the end of the insulating tube close to the right fixing ring, movable grooves are provided on both sides of the outer surface of the right fixing ring, fixing parts are provided on the inner walls of the two movable grooves, two reset springs are provided on the side of the two fixing parts close to the right fixing ring, and a clamping column is provided on the end of the two fixing parts away from the movable groove. Through the installed fixing mechanism, the staff only needs to gently pry open the fixing parts to make the clamping column disengage from the limit groove. In this way, the two insulating joints can be easily separated without the need for staff to spend extra time and energy to disassemble the joints. However, the joints of the above technical solution are mainly located at the junction of the two cable ends during use, and the outer diameter of the cable has a certain tolerance range during the production process. Even cables of the same model may have an outer diameter that varies within a certain range. Therefore, in order to ensure that the joint can adapt to cables with different outer diameters, the insulating joint will be designed to have a certain degree of looseness, so that it can be applied to 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, resulting in an insufficient fit between the inner wall of the joint and the outer wall of the cable. The joint will loosen during use, especially when the cable is subjected to external forces such as mechanical vibration, stretching or torsion. The loose joint is more likely to cause poor contact or degradation of electrical performance, thereby causing accidents such as cable leakage and short circuit, affecting the normal use of the cable. Summary of the Invention

[0004] The object of the present invention is to provide an insulating joint and a working method thereof, wherein the main insulating head and the auxiliary insulating head are both firmly fixed to the ends of the cables to be connected through a multi-claw centripetal cable tightening assembly, and the two cable ends are brought close together until the main insulating head and the auxiliary insulating head are firmly threaded together. 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 plug-in slot at the end of the auxiliary insulating head. Finally, the screw-type pin rod positioning structure on the auxiliary insulating head is used to lock the elastic tongue pin to complete the fixing operation of the main insulating head and the auxiliary insulating head, thereby solving the problems raised in the above-mentioned background technology.

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

[0006] A main insulating head and a secondary insulating head are screwed together, wherein an internal thread joint is rotatably mounted on one end of the main insulating head close to the secondary insulating head, and an external thread joint for screwing with the internal thread joint is integrally formed on one end of the secondary insulating head close to the main insulating head, and an annular lip is integrally formed on the outer peripheral surface of the external thread joint. A multi-claw centripetal cable tightening assembly for connecting to a cable is provided on the ends of the main insulating head and the secondary insulating head away from each other;

[0007] An elastic tongue pin is arranged on the outer wall of one end of the internal threaded joint, and a plug-in groove for the elastic tongue pin to enter is provided on the outer wall of the annular lip on the side close to the external threaded joint. A screw-type pin rod positioning structure for locking the elastic tongue pin is provided on the arc surface outer wall of the annular lip. The screw-type pin rod positioning structure is used to mechanically lock the elastic tongue pin after the elastic tongue pin enters the plug-in groove.

[0008] Preferably, a sealing member is provided on an outer wall on a side opposite to the internal thread joint and the annular lip, and the contact surfaces of the internal thread joint and the annular lip are sealed by the sealing member.

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

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

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

[0012] Preferably, an annular dovetail groove is provided on the outer wall of the inner center sleeve, and an annular dovetail edge rotatably matched with the annular dovetail groove is provided on the inner wall of the bevel gear plate.

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

[0014] Preferably, the screw-type pin positioning structure includes an externally threaded column fixed on the arc wall of the annular lip, an annular rib integrally formed at one end inside the externally threaded column, a pin rod unit slidably installed at the center position inside the annular rib, and an internally threaded cap threadedly matched on the outer circumference of the externally threaded column, the top of the internally threaded cap and the top of the pin rod unit abut against each other, the outer circumference of the pin rod unit is integrally formed with a conical rib, and the bottom of the externally threaded column is equipped with a second spring coaxial with the pin rod unit, the top of the second spring and the bottom end of the conical rib abut against each other, after the tongue pin unit is inserted into the plug-in slot, the central axes of the positioning hole and the pin rod unit coincide with each other, and the outer diameter of the conical rib is larger than the inner diameter of the annular rib.

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

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

[0017] S101: The outer insulation layers of the two cables to be connected must be stripped off at the opposite ends to expose the conductors to be connected. The conductors of the two cables are then tightly wound together in a spiral. Finally, several layers of tape are wrapped around the conductors at the connection point for protection.

[0018] S102: The main insulating head and the auxiliary insulating head are prepared separately, and the cable end to be connected is installed in the multi-claw centripetal cable tightening assembly. At this time, the ends of the main insulating head and the auxiliary insulating head that are separated from each other are connected to the cable through the multi-claw centripetal cable tightening assembly. The internal threaded joint is manually screwed, and the internal threaded joint and the external threaded joint are gradually connected and tightened until the connection part is completely tightened to form a firm connection. During the screwing, the cable end is firmly fixed between the two insulating heads by the multi-claw centripetal cable tightening assembly.

[0019] S103: When 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: In order to further ensure the firm connection between the main insulating head and the auxiliary insulating head, a screw-type pin positioning structure is designed on the auxiliary insulating head. This structure locks the inserted elastic tongue pin through a rotating 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 auxiliary insulating head. At this point, the main insulating head, auxiliary insulating head and cable end have been firmly fixed together through multiple mechanisms.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the insulating joint and its working method provide an effective and stable cable connection solution through the precise screwing fit of the main insulating head and the auxiliary insulating head, combined with the structural design of the multi-claw centripetal cable tightening assembly. The design of the multi-claw centripetal cable tightening assembly can accurately adjust the fixing force of the joint according to the outer diameter of the cable to achieve a tight combination 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. The multi-claw cable tightening assembly increases the friction between the joint and the cable through the evenly distributed gripping force, effectively avoiding the problem of loose connection caused by vibration, stretching or external force, especially in high-load or dynamic environments, providing a more stable electrical connection. The multi-claw centripetal cable tightening assembly also accurately 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 mismatched cable specifications.

[0022] The combination of the elastic tongue pin at the end of the main insulating head and the auxiliary insulating head slot, as well as the screw-type pin positioning structure on the auxiliary insulating head, further strengthens the fixing and locking functions of the main and auxiliary insulating heads. This design can firmly fix the connector after screwing through the locking action of the elastic tongue pin, preventing it from loosening during use. The screw-type pin positioning structure provides additional mechanical locking after rotational installation, ensuring that the main and auxiliary insulating heads will not accidentally loosen or move under vibration or external forces, thereby ensuring long-term connection stability and electrical performance reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the three-dimensional cross-sectional structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure 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 schematic diagram of the three-dimensional structure 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 of the present invention in a docking state;

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure 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 schematic diagram of the three-dimensional structure of the second embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of a three-dimensional cross-sectional structure of a multi-claw type centripetal cable tightening assembly according to the second embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of a three-dimensional cross-sectional structure of an internal threaded joint according to a third embodiment of the present invention;

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

[0033] Figure 11 Schematic diagram of the three-dimensional cross-sectional structure of the auxiliary insulating head according to the fourth embodiment of the present invention;

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

[0035] Figure: 1, main insulator; 2, auxiliary insulator; 3, internal thread joint; 301, circular groove; 4, external thread joint; 5, multi-claw centripetal cable tightening assembly; 501, outer sleeve; 5011, hollow groove; 502, inner center sleeve; 5021, annular dovetail groove; 503, bevel gear plate; 5031, annular dovetail edge; 504, I-shaped slider; 505, rectangular rib; 506, arc-shaped clamping plate; 507, active bevel gear; 5071, square concave Hole; 6. Inner concave cavity; 7. Elastic tongue pin; 701. Ring sleeve; 702. Coil spring; 703. Tongue pin unit; 704. Positioning hole; 705. Rectangular inner concave portion; 8. Annular lip; 801. Sealing ring; 802. Pin hole; 9. Insertion groove; 10. Screw-type pin rod positioning structure; 1001. Externally threaded column; 1002. Internally threaded cap; 1003. Pin rod unit; 1004. Annular rib; 1005. Conical rib; 1006. Second spring. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] Embodiment 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 joint 3 is rotatably installed on one end of the main insulating head 1 close to the secondary insulating head 2. An external threaded joint 4 for screwing with the internal threaded joint 3 is integrally formed on one end of the secondary insulating head 2 close to the main insulating head 1. An annular lip 8 is integrally formed on the outer peripheral surface of the external threaded joint 4. A multi-claw centripetal cable tightening assembly 5 for connecting to a cable is provided on the ends of the main insulating head 1 and the secondary insulating head 2 that are away from each other.

[0038] When the main insulating head 1 and the auxiliary insulating head 2 are connected to the cable end through the multi-claw type centripetal cable tightening assembly 5, the auxiliary insulating head 2, the external threaded joint 4, and the annular lip 8 are moved closer to the internal threaded joint 3 until the internal threaded joint 3 and the external threaded joint 4 are threadedly connected. At this time, the staff continuously rotates the internal threaded joint 3 so that the internal threaded joint 3 rotates around the center line of the main insulating head 1, and then the internal threaded joint 3 continuously tightens the external threaded joint 4 until the two are screwed into place to form a firm connection. Through the screwing connection method, the operator can easily complete the docking and fixation of the main and auxiliary insulating heads without using too much external force or complicated tools.

[0039] An elastic tongue pin 7 is provided on the outer wall of one end of the internal threaded joint 3. A plug-in slot 9 for the elastic tongue pin 7 to enter is provided on the outer wall of the annular lip 8 on the side close to the external threaded joint 4. A screw-type pin rod positioning structure 10 for locking the elastic tongue pin 7 is provided on the arcuate outer wall of the annular lip 8. The screw-type pin rod positioning structure 10 is used to mechanically lock the elastic tongue pin 7 after the elastic tongue pin 7 enters the plug-in slot 9;

[0040] A sealing member is provided on the outer wall of the side opposite to the internal thread joint 3 and the annular lip 8, and the contact surfaces of the internal thread joint 3 and the annular lip 8 are sealed by the sealing member. The sealing member includes a circular groove 301 provided on the outer wall of one side of the internal thread joint 3 and a sealing ring 801 fixed on the outer wall of one side of the annular lip 8. Two elastic tongue pins 7 are provided, 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. When the internal thread joint 3 and the external thread joint 4 are connected, the sealing ring 801 on the outer wall of the side of the annular lip 8 away from the multi-claw type centripetal cable tightening assembly 5 will be embedded in the circular groove 301, and as the internal thread joint 3 and the external thread joint 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 thread joint 3, which can effectively fill the tiny gap between the internal thread joint 3 and the annular lip 8 to prevent the penetration of liquid, gas or other external contaminants.

[0041] Insulated joints are often affected by external factors such as vibration and temperature changes. The elasticity of the sealing ring 801 enables it to adapt to deformation and pressure changes within a certain range, thereby maintaining sealing performance during vibration or temperature fluctuations. The design of the circular groove 301 helps to stably install and fix the sealing ring 801, making it less likely to shift when facing external disturbances, thereby maintaining a long-term stable sealing effect.

[0042] A working method of an insulating joint according to this embodiment, such as the insulating joint described above, includes the following steps:

[0043] S101: The outer insulation layers of the two cables to be connected must be stripped off at the opposite ends to expose the conductors to be connected. The conductors of the two cables are then tightly wound together in a spiral. Finally, several layers of tape are wrapped around the conductors at the connection point for protection.

[0044] S102: The main insulating head 1 and the auxiliary insulating head 2 are prepared separately, and the cable end to be connected is installed in the multi-claw centripetal tightening cable assembly 5. At this time, the ends of the main insulating head 1 and the auxiliary insulating head 2 that are away from each other are connected to the cable through the multi-claw centripetal tightening cable assembly 5. The internal threaded joint 3 is manually screwed, and the internal threaded joint 3 and the external threaded joint 4 are gradually connected and tightened until the connection part is completely tightened to form a firm connection. During the screwing, the cable end is firmly fixed between the two insulating heads by the multi-claw centripetal tightening cable assembly 5;

[0045] 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 slot 9 at the end of the auxiliary insulating head 2;

[0046] S104: In order to further ensure the firm 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. The structure locks the inserted elastic tongue pin 7 through 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 auxiliary insulating head 2. At this point, the main insulating head 1, the auxiliary insulating head 2 and the cable end have been firmly fixed together through multiple mechanisms.

[0047] Example 2, based on Example 1, Figure 7 and Figure 8 The multi-claw centripetal cable tightening assembly 5 includes an outer sleeve 501 integrally formed at one end of the main insulating head 1, an inner center sleeve 502 integrally formed at the center position inside the outer sleeve 501, a bevel gear disc 503 rotatably mounted on the outer circumference 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. A flat thread is provided on the outer wall of the bevel gear disc 503 away from the main insulating head 1, and the I-shaped slider 504 is close to the inner center sleeve 502. A rectangular rib 505 that cooperates with the flat thread is provided on one side of the outer wall. An arc-shaped clamping plate 506 is fixed on the outer wall of the I-shaped slider 504 away from the inner center sleeve 502. The multi-claw centripetal cable tightening assembly 5 also includes an active bevel gear 507 rotatably mounted on the outer wall of the inner center sleeve 502. The active bevel gear 507 and the bevel gear disk 503 are engaged 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 thread joint 3.

[0048] When the main insulating head 1 and the auxiliary insulating head 2 are fastened to the cable end through the multi-claw centripetal cable tightening assembly 5, the staff will sleeve the main insulating head 1 and the outer sleeve 501 or the auxiliary insulating head 2 and the outer sleeve 501 on the cable end and adjust the position of the main insulating head 1 and the outer sleeve 501. Then the user takes out the torque wrench and uses the torque wrench and the square inner concave hole 5071 to rotate the active bevel gear 507. The active bevel gear 507 drives the bevel gear disk 503 to rotate. Since the bottom end of the I-shaped slider 504 is connected to the flat thread on the outer wall of the bevel gear disk 503 through the rectangular rib 505, the bevel gear disk 503 rotates. When the bevel gear disc 503 rotates, it drives each I-shaped slider 504 toward or away from the central axis of the outer sleeve 501 through the flat thread, that is, the I-shaped slider 504 can drive the arc-shaped clamping plate 506 toward the outer wall of the cable until the multiple arc-shaped clamping plates 506 are synchronously pressed against the outer wall of the cable to evenly distribute the pressing force to the outside of the cable. Since the multiple arc-shaped clamping plates 506 are distributed around the cable, the gripping force of the cable can be improved, which is particularly suitable for occasions with high requirements for resisting tensile force, thereby reducing the risk of the connector slipping through the tightening force of the multiple arc-shaped clamping plates 506.

[0049] The outer wall of the outer sleeve 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 sleeve 501 provides a guide for the sliding of the I-shaped slider 504, allowing the I-shaped slider 504 and the arc-shaped clamping plate 506 to stably approach or move away from the cable. A square inner recessed hole 5071 is provided on the outer wall of the end of the driving bevel gear 507 away from the central axis of the outer sleeve 501.

[0050] When the bevel gear plate 503 drives the multiple I-shaped sliders 504 and the arc-shaped clamping plate 506 to move together, it has a large adaptability range 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 plate 503 to rotate with the annular dovetail groove 5021. When the bevel gear plate 503 is driven to rotate by the active bevel gear 507, the annular dovetail edge 5031 on the inner wall of the bevel gear plate 503 rotates with the annular dovetail groove 5021 on the outer wall of the inner center sleeve 502, and the annular dovetail edge 5031 and the annular dovetail groove 5021 enable the bevel gear plate 503 to rotate stably.

[0052] Example 3, based on Example 2, Figure 9 and Figure 10 The elastic tongue pin 7 includes an inner concave cavity 6 provided in the plane wall of the internal threaded joint 3, a tongue pin unit 703 slidably installed inside the inner concave cavity 6, and a ring sleeve 701 fixed on the inner wall of one side of the inner concave cavity 6. A coil spring 702 is fixed inside the ring sleeve 701. One end of the coil 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 end of the tongue pin unit 703. A rectangular inner recess 705 is provided on the outer wall of one side of the tongue pin unit 703. One end of the coil spring 702 extends into the interior of the rectangular inner recess 705 and is fixedly connected to the tongue pin unit 703. The rectangular inner recess 705 inside the tongue pin unit 703 allows one end of the coil spring 702 to enter, so as to increase the amount of movement of the coil spring 702.

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

[0054] Example 4, based on Example 3, Figure 11 and Figure 12 It is given that the screw-type pin positioning structure 10 includes an external threaded column 1001 fixed on the arc wall of the annular lip 8, an annular rib 1004 integrally formed at one end of the external threaded column 1001, a pin rod monomer 1003 slidably installed at the center position inside the annular rib 1004, and an internal threaded cap 1002 threadedly matched on the outer peripheral surface of the external threaded column 1001, the top of the internal threaded cap 1002 and the top of the pin rod monomer 1003 abut against each other, the outer peripheral surface of the pin rod monomer 1003 is integrally formed with a conical rib 1005, and the bottom of the external threaded column 1001 is equipped with a second spring 1006 coaxial with the pin rod monomer 1003, the top of the second spring 1006 and the bottom end of the conical rib 1005 abut against each other, after the tongue pin monomer 703 is inserted into the plug-in slot 9, the positioning hole 704, the pin rod monomer 1003 The central axes coincide with each other, the outer diameter of the tapered rib 1005 is larger than the inner diameter of the annular rib 1004, and the interior of the annular lip 8 is provided with a pin hole 802 for the pin rod monomer 1003 to move down and enter the positioning hole 704. When the positioning hole 704 and the pin hole 802 are concentric, the staff can manually rotate the internal threaded cap 1002 so that the internal threaded cap 1002 is screwed down, and the internal threaded cap 1002 drives the pin rod monomer 1003 and the tapered rib 1005 to move down. At this time, the second spring 1006 is in a compressed state until the bottom end of the pin rod monomer 1003 passes through the pin hole 802 and enters the positioning hole 704. The tongue pin monomer 703 is locked by the downwardly moved pin rod monomer 1003 to ensure that the pin rod monomer 1003 will not loosen or fall off by itself in the case of external vibration or impact, thereby 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 simple to operate. The locking work can be completed by rotating the coil spring 702 manually or with simple tools. The operation process is convenient and efficient, and it can be reused without replacing the pin every time.

[0056] When the embodiment of the present application is in use, the staff first needs to ensure that all parts are complete and clean, and the outer insulation layers of the opposite ends of the two cables to be connected need to be stripped off first to expose the conductor parts to be connected, so that the conductor parts of the two cables are tightly wound together in a spiral form, and finally several layers of tape are wrapped around the conductor parts of the connection parts for protection. Then the staff prepares the main insulating head 1 and the auxiliary insulating head 2 respectively, wherein one end of the main insulating head 1 is rotated to be equipped with an internal threaded connector 3, and the auxiliary insulating head 2 is equipped with an external threaded connector 4. The ends of the cables to be connected are then installed in the multi-claw centripetal cable tightening assembly 5. At this time, the ends of the main insulating head 1 and the auxiliary insulating head 2 that are away from each other are both tightened by the multi-claw The centripetal cable tightening assembly 5 is connected to the cable, and the cable end is inserted into the inner cavity of the multi-claw centripetal cable tightening assembly 5. The multi-claw centripetal cable tightening assembly 5 provides uniform gripping force according to the outer diameter of the cable to ensure that the cable end is tightly fixed to the main insulating head or the auxiliary insulating head, and the claw-shaped structure of the assembly will automatically adjust the gripping force according to the size of the cable, and ensure that the cable end is firmly fixed in the assembly through axial centripetal force, thereby providing stable support for the subsequent connection of the main insulating head 1 and the auxiliary insulating head 2. After the main insulating head 1 and the auxiliary insulating head 2 are fixed to the cable end, the main insulating head 1 and the auxiliary insulating head 2 are connected by threaded connection, and the internal thread joint 3 of the main insulating head 1 is connected to the external thread joint of the auxiliary insulating head 2. The heads 4 match each other to ensure that there is a very high screwing fit accuracy between the two. The operator manually screws the internal threaded joint 3 to gradually connect and tighten the internal threaded joint 3 and the external threaded joint 4 until the connection part is completely tightened to form a firm connection. When screwing, the cable end is firmly fixed between the two insulating heads by the multi-claw centripetal cable tightening assembly 5 to ensure that the joint will not be loose or misaligned. 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 plug-in slot 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, which can ensure that the tongue pin is firmly fixed after insertion and will not fall off due to external force or vibration. In the first step, the main insulating head 1 and the auxiliary insulating head 2 are firmly connected. A screw-type pin positioning structure 10 is designed on the auxiliary insulating head 2. The 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 auxiliary insulating head 2. The 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, and will not loosen or fall off. After the above steps, the main insulating head 1, the auxiliary insulating head 2 and the cable end have been 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, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

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

Claims

1. An insulating joint, characterized in that: include: A main insulating head (1) and a secondary insulating head (2) are screwed together, an internal thread joint (3) is rotatably mounted on one end of the main insulating head (1) close to the secondary insulating head (2), an external thread joint (4) for screwing together with the internal thread joint (3) is integrally formed on one end of the secondary insulating head (2) close to the main insulating head (1), an annular lip (8) is integrally formed on the outer peripheral surface of the external thread joint (4), and a multi-claw type centripetal cable tightening assembly (5) for connecting to a cable is provided on the ends of the main insulating head (1) and the secondary insulating head (2) away from each other; An elastic tongue pin (7) is provided on the outer wall of one end of the internal thread joint (3); a plug-in slot (9) for the elastic tongue pin (7) to enter is provided on the outer wall of the annular lip (8) on one side close to the external thread joint (4); a screw-type pin rod positioning structure (10) for locking the elastic tongue pin (7) is provided on the arc surface outer wall of the annular lip (8); the screw-type pin rod positioning structure (10) is used to mechanically lock the elastic tongue pin (7) after the elastic tongue pin (7) enters the plug-in slot (9).

2. The insulating joint according to claim 1, characterized in that: A sealing member is provided on the outer wall of the internal thread joint (3) and the annular lip (8) on the side opposite to each other, and the contact surfaces of the internal thread joint (3) and the annular lip (8) are sealed by the sealing member.

3. The insulating joint according to claim 2, characterized in that: The sealing member comprises a circular groove (301) provided on the outer wall of one side of the internal thread joint (3) and a sealing ring (801) fixed on the outer wall of one side of the annular lip (8); two elastic tongue pins (7) are provided, the two elastic tongue pins (7) are symmetrically arranged about the central axis of the main insulating head (1); and the outer diameter of the circular groove (301) is smaller than the distance between the two elastic tongue pins (7).

4. The insulating joint according to claim 3, characterized in that: The multi-claw type centripetal cable tightening assembly (5) comprises an outer sleeve (501) integrally formed at one end of a main insulating head (1), an inner center sleeve (502) integrally formed at the inner center position of the outer sleeve (501), a bevel gear disc (503) rotatably mounted on the outer circumference 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), wherein a plane thread is provided on the outer wall of the bevel gear disc (503) away from the main insulating head (1), and a plane thread is provided on the outer wall of the I-shaped slider (504) close to the inner center sleeve (502). A rectangular convex rib (505) is provided on the outer wall and cooperates with the flat thread. An arc-shaped clamping plate (506) is fixed on the outer wall of the I-shaped slider (504) away from the inner center sleeve (502). The multi-claw centripetal cable tightening assembly (5) also includes an active bevel gear (507) rotatably mounted on the outer wall of the inner center sleeve (502). The active bevel gear (507) and the bevel gear disk (503) are meshed 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 thread joint (3).

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

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

7. The insulating joint according to claim 3, characterized in that: The elastic tongue pin (7) comprises an inner concave cavity (6) arranged in the plane wall of the internal threaded joint (3), a tongue pin unit (703) slidably installed inside the inner concave cavity (6), and a ring sleeve (701) fixed on the inner wall of one side of the inner concave cavity (6); a coil spring (702) is fixed inside the ring sleeve (701); one end of the coil 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 end of the tongue pin unit (703); a rectangular inner concave portion (705) is provided on the outer wall of one side of the tongue pin unit (703); one end of the coil spring (702) extends into the interior of the rectangular inner concave portion (705) and is fixedly connected to the tongue pin unit (703); the inner concave cavity (6) is located outside the outer diameter of the circular groove (301).

8. The insulating joint according to claim 7, characterized in that: The screw-type pin rod positioning structure (10) comprises an external thread column (1001) fixed on the arc surface wall of the annular lip (8), an annular retaining edge (1004) integrally formed at one end of the internal end of the external thread column (1001), a pin rod monomer (1003) slidably mounted at the internal center position of the annular retaining edge (1004), and an internal thread cap (1002) threadedly matched on the outer peripheral surface of the external thread column (1001), the top of the internal thread cap (1002) abuts against the top of the pin rod monomer (1003), and the pin rod monomer (1003) is fixed on the arc surface wall of the annular lip (8), and the pin rod monomer (1003) is fixed on the arc surface wall of the annular lip (8), and the pin rod monomer (1003) is fixed on the arc surface of the annular lip (8) 03) is integrally formed with a tapered rib (1005), and a second spring (1006) coaxial with the pin rod monomer (1003) is installed at the bottom of the external threaded column (1001), and the top end of the second spring (1006) and the bottom end of the tapered rib (1005) abut against each other. After the tongue pin monomer (703) is inserted into the plug-in slot (9), the central axes of the positioning hole (704) and the pin rod monomer (1003) coincide with each other, and the outer diameter of the tapered rib (1005) is greater than the inner diameter of the annular rib (1004).

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

10. A method for operating an insulating joint, comprising the insulating joint according to any one of claims 1 to 9, characterized in that: The following steps are involved: S101: The outer insulation layers of the two cables to be connected must be stripped off at the opposite ends to expose the conductors to be connected. The conductors of the two cables are then tightly wound together in a spiral. Finally, several layers of tape are wrapped around the conductors at the connection point for protection. S102: The main insulating head (1) and the auxiliary insulating head (2) are prepared respectively, and the end of the cable to be connected is installed in the multi-claw type centripetal cable tightening assembly (5). At this time, the ends of the main insulating head (1) and the auxiliary insulating head (2) that are away from each other are connected to the cable through the multi-claw type centripetal cable tightening assembly (5). The internal threaded joint (3) is manually screwed, and the internal threaded joint (3) and the external threaded joint (4) are gradually connected and tightened until the connection part is completely tightened to form a firm connection. When screwing, the cable end is firmly fixed between the two insulating heads by the multi-claw type centripetal 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 slot (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 auxiliary insulating head (2), a screw-type pin rod positioning structure (10) is designed on the auxiliary insulating head (2). The structure locks the inserted elastic tongue pin (7) by a rotating pin rod. When the screw-type pin rod positioning structure (10) is rotated to the appropriate position, the pin rod will mechanically engage with the elastic tongue pin (7), further enhancing the fixing effect of the auxiliary insulating head (2). At this point, the main insulating head (1), the auxiliary insulating head (2) and the cable end have been firmly fixed together through multiple mechanisms.

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