Multifunctional sealing structure for cable terminal head

Abstract

This utility model relates to the field of cable termination technology, specifically a multifunctional sealing structure for cable terminations, including a lead-out rod, an epoxy sleeve, and a base plate. The epoxy sleeve is internally connected to the base plate. The lead-out rod is fixedly connected to the end of the epoxy sleeve away from the base plate. A conductive clamp is provided at the end of the lead-out rod away from the epoxy sleeve. A sealing pressure plate is fixedly connected to the side of the conductive clamp near the lead-out rod. The sealing pressure plate is connected to the lead-out rod by a clamping nut. A shielding cover is snapped onto the surface of the conductive clamp. A rubber preform is provided inside the epoxy sleeve, and a retaining ring is provided at the point where the rubber preform abuts against the epoxy sleeve. This utility model, through the cooperation of the sealing ring and lead seal, achieves comprehensive sealing of the cable termination from different parts and levels, reducing moisture and contamination of internal electrical components, improving the reliability and service life of the equipment, and enhancing the overall sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of cable termination technology, and in particular to a multifunctional sealing structure for cable terminations. Background Technology

[0002] When powering on the inside of the cabinet, the cable needs to be connected to the power supply terminal inside the cabinet. In general, bolts and tape are used to connect the cables haphazardly. Over time, this can easily lead to corrosion and make the equipment unusable. Therefore, a multi-functional sealing structure for cable terminations is used to block dust or water mist from the environment, thereby improving the service life of the equipment.

[0003] Existing technologies, such as patent CN220652951U, disclose a cable termination head. This patent uses a three-pronged sleeve, with evenly distributed three-pronged tubes connected to the top of the sleeve. A cold-shrinkable insulating tube is provided at the upper end of each three-pronged tube, and a sealing component is provided inside the cold-shrinkable insulating tube. The three-pronged sleeve is fitted onto the cable, and the three-pronged tubes and the cold-shrinkable insulating tube are fitted onto the cable core. A second insert is fixedly connected to the top of the cold-shrinkable insulating tube, and a wire terminal is sleeved on the outside of the second insert. The sealing component includes an installation groove formed in the middle of the cold-shrinkable insulating tube, which divides the cold-shrinkable insulating tube into two parts. This utility model solves the problem that in existing devices, the cold-shrinkable sheath of the cable termination head is directly fitted and then sealed between the three prongs. This results in the sealing and waterproofing relying entirely on the subsequent sealing structure. In most existing technologies, sealing tape is used, but its wear resistance and corrosion resistance are poor, and it is easily damaged when exposed to the outside for a long time.

[0004] In daily operation, compared with the existing equipment that uses only bolts and tape for sealing, the equipment connection is prone to poor sealing and corrosion, which affects the normal operation of the equipment. Utility Model Content

[0005] The purpose of this utility model is to solve the shortcomings of the existing technology, such as poor sealing effect at the equipment connection, which affects the service life of the equipment, and to propose a multi-functional sealing structure for cable termination heads.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a multi-functional sealing structure for cable terminations, comprising a lead-out rod, an epoxy sleeve, and a base plate. The epoxy sleeve is internally inserted into the base plate. The lead-out rod is fixedly connected to the end of the epoxy sleeve away from the base plate. A conductive clamp is provided at the end of the lead-out rod away from the epoxy sleeve. A sealing pressure plate is fixedly connected to the side of the conductive clamp near the lead-out rod. The sealing pressure plate is connected to the lead-out rod by a clamping nut. A shielding cover is snapped onto the surface of the conductive clamp. A rubber preform is provided inside the epoxy sleeve. A retaining ring is provided at the point where the rubber preform abuts against the epoxy sleeve. A main body is fixedly connected inside the rubber preform. A sealing ring is provided at the connection between the epoxy sleeve and the base plate.

[0007] Furthermore, a retaining ring is fitted to the surface of the epoxy sleeve at the end away from the base plate, and the epoxy sleeve is fixedly connected to the base plate by a connecting nut passing through the retaining ring.

[0008] Furthermore, a tail pipe is fixedly connected to the end of the epoxy sleeve away from the base plate, and the tail pipe is fixedly connected to the main body by a lead seal, which ensures the seal between the tail pipe and the main body.

[0009] Furthermore, a heat shrink tubing is fixedly connected to the surface of the main body, and the spring bracket is fixedly connected to the surface of the heat shrink tubing.

[0010] Furthermore, the spring bracket is internally provided with an auxiliary component, which includes a slide rod and a connecting rod. The slide rod is slidably connected inside the spring bracket, and one end of the slide rod is threadedly connected to the inside of the epoxy sleeve. The connecting rod is slidably connected inside the spring bracket and is threadedly connected to the inside of the rubber preform. A positioning nut is fixedly connected to the end of the connecting rod away from the rubber preform.

[0011] Furthermore, a return spring is sleeved on the surface of the connecting rod.

[0012] Furthermore, one end of the return spring is in contact with the surface of the spring bracket, and the end of the return spring away from the spring bracket is in contact with the surface of the rubber preform.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, a multi-layer sealing system is formed by setting a sealing ring between the epoxy sleeve and the base plate, setting a retaining ring between the rubber preform and the epoxy sleeve, and sealing the sealing pressure plate and the outlet rod. The retaining ring enhances the sealing performance between the rubber preform and the epoxy sleeve, the sealing ring ensures the sealing between the epoxy sleeve and the base plate, and the lead seal ensures the sealing between the tail pipe and the main body. These sealing components work together to achieve comprehensive sealing of the cable terminal from different parts and levels. Compared with the single sealing method of existing equipment, it can more effectively reduce the entry of external moisture, dust and other substances into the cable terminal, reduce the moisture and contamination of internal electrical components, improve the reliability and service life of the equipment, and enhance the overall sealing effect.

[0015] 2. In this utility model, by setting an auxiliary component, when the cable terminal is subjected to external force, the return spring can absorb part of the external force. Compared with the prior art, it can reduce the damage of external force to the sealing structure between the rubber preform and the epoxy sleeve, reduce the risk of seal failure caused by external force, and enhance the adaptability of the cable terminal under complex working conditions. Attached Figure Description

[0016] Figure 1 This utility model provides an internal cross-sectional view of a multifunctional sealing structure for cable terminations.

[0017] Figure 2 This utility model proposes a multifunctional sealing structure for cable terminations. Figure 1 Enlarged structural diagram at point A in the middle;

[0018] Figure 3 This utility model proposes a multifunctional sealing structure for cable terminations. Figure 1 Enlarged structural diagram at point B;

[0019] Figure 4 This utility model proposes a multifunctional sealing structure for cable terminations. Figure 1 Enlarged structural diagram at point C;

[0020] Figure 5 This utility model presents a top view of a conductive clamp with a multifunctional sealing structure for cable terminations.

[0021] Legend: 1. Conductive clamp; 2. Shielding cover; 3. Compression nut; 4. Sealing plate; 5. Outlet rod; 6. Epoxy sleeve; 7. Retaining ring; 8. Rubber preform; 9. Snap ring; 10. Spring bracket; 11. Tail tube; 12. Lead seal; 13. Main body; 14. Base plate; 15. Sealing ring; 16. Connecting nut; 17. Auxiliary components; 171. Heat shrink tubing; 172. Connecting rod; 173. Positioning nut; 174. Return spring; 175. Slide rod. Detailed Implementation

[0022] Please see Figures 1-5 This utility model provides a technical solution: a multi-functional sealing structure for cable terminations, including a lead-out rod 5, an epoxy sleeve 6, and a base plate 14. The epoxy sleeve 6 is internally inserted into the base plate 14. The lead-out rod 5 is fixedly connected to the end of the epoxy sleeve 6 away from the base plate 14. The lead-out rod 5 is made of a high-conductivity copper alloy and its surface is tin-plated, which not only effectively reduces resistance and power transmission loss, but also enhances oxidation resistance and extends service life. Its internal structure design meets electrical performance requirements and ensures stable current transmission.

[0023] The epoxy sleeve 6 is made of epoxy resin composite material, which has excellent insulation performance, mechanical strength and chemical corrosion resistance. Its inner wall is finely processed and has a smooth surface. When it is used with the rubber preform 8, it can effectively reduce gaps and improve the sealing effect. The base plate 14 is made of high-strength metal material and is rust-proofed. It has a positioning groove inside, which can accurately position it when it is inserted and connected with the epoxy sleeve 6, ensuring the stability of the overall structure.

[0024] The following section will describe in detail the specific design and function of a multi-functional sealing structure for cable terminations.

[0025] In this implementation scheme: A conductive clamp 1 is provided at the end of the outlet rod 5 away from the epoxy sleeve 6. The conductive clamp 1 adopts a split structure design and is made of highly conductive metal material. It clamps the cable conductor by bolt fastening to ensure the reliability of electrical connection. Its surface is polished to effectively reduce contact resistance. A sealing pressure plate 4 is fixedly connected to the side of the conductive clamp 1 near the outlet rod 5. The sealing pressure plate 4 is connected to the outlet rod 5 by a clamping nut 3. A shielding cover 2 is snapped onto the surface of the conductive clamp 1. The shielding cover 2 is made of highly magnetic permeable metal material and has a cylindrical structure. It is tightly snapped onto the conductive clamp 1 by a buckle. It can effectively shield the electromagnetic interference generated during the operation of the cable terminal and reduce the influence of external electromagnetic signals on the internal current transmission of the cable. A rubber preform 8 is provided inside the epoxy sleeve 6. A retaining ring 7 is provided at the abutment of the rubber preform 8 and the epoxy sleeve 6. A main body 13 is fixedly connected inside the rubber preform 8. A sealing ring 15 is provided at the connection between the epoxy sleeve 6 and the base plate 14.

[0026] Specifically, a retaining ring 9 is fitted to the surface of the end of the epoxy sleeve 6 away from the base plate 14. The epoxy sleeve 6 is fixedly connected to the base plate 14 through the retaining ring 9 by the connecting nut 16. The retaining ring 9 is made of metal and has a certain degree of elasticity and rigidity. Its inner wall is tightly fitted to the outer wall of the epoxy sleeve 6, which can play a role in positioning and auxiliary fixing, ensuring that the epoxy sleeve 6 is subjected to uniform force when the connecting nut 16 is tightened.

[0027] Specifically, the end of the epoxy sleeve 6 furthest from the base plate 14 is fixedly connected to a tail tube 11. The tail tube 11 is made of copper and has a certain degree of flexibility and corrosion resistance. It can protect the outer layer of the cable and reduce damage to the outer layer of the cable during installation and use. The tail tube 11 is fixedly connected to the main body 13 by a lead seal 12, which ensures the seal between the tail tube 11 and the main body 13.

[0028] Specifically, a heat shrink tubing 171 is fixedly connected to the surface of the main body 13, and a spring bracket 10 is fixedly connected to the surface of the heat shrink tubing 171.

[0029] In this embodiment: further, an auxiliary component 17 is provided inside the spring bracket 10. The auxiliary component 17 includes a slide rod 175 and a connecting rod 172. The slide rod 175 is slidably connected inside the spring bracket 10. One end of the slide rod 175 is threadedly connected to the inside of the epoxy sleeve 6. The connecting rod 172 is slidably connected inside the spring bracket 10. The connecting rod 172 is threadedly connected inside the rubber preform 8. A positioning nut 173 is fixedly connected to the end of the connecting rod 172 away from the rubber preform 8.

[0030] Specifically, a return spring 174 is sleeved on the surface of the connecting rod 172.

[0031] Specifically, one end of the return spring 174 is in contact with the surface of the spring bracket 10, and the other end of the return spring 174 away from the spring bracket 10 is in contact with the surface of the rubber preform 8.

[0032] Working principle: First, the epoxy sleeve 6 is inserted and connected to the base plate 14. The epoxy sleeve 6 and the base plate 14 are fixed by the connecting nut 16 and the retaining ring 9. The lead rod 5 is connected to the end of the epoxy sleeve 6 away from the base plate 14. The conductive clamp 1 is installed at the end of the lead rod 5. The sealing plate 4 is connected to the lead rod 5 by the clamping nut 3 to achieve a sealed connection between the conductive clamp 1 and the lead rod 5. The shielding cover 2 is snapped onto the surface of the conductive clamp 1 to shield electromagnetic interference. The rubber preform 8 is installed inside the epoxy sleeve 6. A retaining ring 7 is set at the point where it abuts the epoxy sleeve 6. By setting a sealing ring 15 between the epoxy sleeve 6 and the base plate 14, the rubber preform... A retaining ring 7 is installed between component 8 and epoxy sleeve 6, and a sealing pressure plate 4 is sealed to the outlet rod 5, forming a multi-seal system. The retaining ring 7 enhances the sealing between the rubber preform 8 and epoxy sleeve 6, the sealing ring 15 ensures the seal between epoxy sleeve 6 and base plate 14, and the lead seal 12 ensures the seal between tail pipe 11 and main body 13. These sealing components work together to achieve comprehensive sealing of the cable terminal from different parts and levels. Compared with the single sealing method of existing equipment, it can more effectively reduce the entry of external moisture, dust and other substances into the cable terminal, reduce the moisture and contamination of internal electrical components, improve the reliability and service life of the equipment, and enhance the overall sealing effect.

[0033] When the auxiliary component 17 is in use, the spring bracket 10 is fixed to the surface of the heat shrink tubing 171, and the heat shrink tubing 171 is wrapped around the surface of the main body 13. The slide rod 175 in the auxiliary component 17 slides inside the spring bracket 10, with one end threaded to the inside of the epoxy sleeve 6, which serves to fix the spring bracket 10 and the epoxy sleeve 6. The connecting rod 172 slides inside the spring bracket 10, with one end threaded to the inside of the rubber preform 8, and the other end fixedly connected to the positioning nut 173. The return spring 174 is sleeved on the surface of the connecting rod 172, with one end in contact with the surface of the spring bracket 10 and the other end in contact with the surface of the rubber preform 8. By setting the auxiliary component 17, when the cable terminal is subjected to external force, the return spring 174 can absorb part of the external force. Compared with the prior art, it can reduce the damage of external force to the sealing structure between the rubber preform 8 and the epoxy sleeve 6, reduce the risk of seal failure due to external force, and enhance the adaptability of the cable terminal under complex working conditions.

Claims

1. A multi-functional sealing structure for a cable terminal, comprising an outgoing line rod (5), an epoxy sleeve (6) and a base plate (14), characterized in that: The epoxy sleeve (6) is internally inserted into the base plate (14). The lead rod (5) is fixedly connected to the end of the epoxy sleeve (6) away from the base plate (14). A conductive clamp (1) is provided at the end of the lead rod (5) away from the epoxy sleeve (6). A sealing pressure plate (4) is fixedly connected to the side of the conductive clamp (1) near the lead rod (5). The sealing pressure plate (4) is connected to the lead rod (5) through a clamping nut (3). A shielding device is snapped onto the surface of the conductive clamp (1). Cover (2), the epoxy sleeve (6) is provided with a rubber preform (8) inside, a retaining ring (7) is provided at the abutment of the rubber preform (8) and the epoxy sleeve (6), a main body (13) is fixedly connected inside the rubber preform (8), a sealing ring (15) is provided at the connection between the epoxy sleeve (6) and the base plate (14), a heat shrink tube (171) is fixedly connected to the surface of the main body (13), and a spring bracket (10) is fixedly connected to the surface of the heat shrink tube (171).

2. A multi-functional sealing structure for a cable terminal head according to claim 1, characterized in that: The epoxy sleeve (6) has a retaining ring (9) attached to the surface of the end away from the base plate (14). The epoxy sleeve (6) is fixedly connected to the base plate (14) by the retaining ring (9) through the connecting nut (16).

3. A multi-functional sealing structure for a cable terminal head according to claim 2, characterized in that: The epoxy sleeve (6) is fixedly connected to a tail tube (11) at the end away from the base plate (14), and the tail tube (11) is fixedly connected to the main body (13) by a lead seal (12).

4. The multi-functional sealing structure for cable termination according to claim 1, wherein: The spring bracket (10) is fixedly connected to the surface of the heat shrink tubing (171).

5. A multifunctional sealing structure for cable terminations according to claim 1, characterized in that: An auxiliary component (17) is provided inside the spring bracket (10). The auxiliary component (17) includes a slide rod (175) and a connecting rod (172). The slide rod (175) is slidably connected inside the spring bracket (10). One end of the slide rod (175) is threadedly connected to the inside of the epoxy sleeve (6). The connecting rod (172) is slidably connected inside the spring bracket (10). The connecting rod (172) is threadedly connected to the inside of the rubber preform (8). A positioning nut (173) is fixedly connected to the end of the connecting rod (172) away from the rubber preform (8).

6. A multi-functional sealing structure for a cable terminal head according to claim 5, characterized in that: A return spring (174) is sleeved on the surface of the connecting rod (172).

7. A multi-functional sealing structure for a cable terminal head according to claim 6, characterized in that: One end of the return spring (174) is attached to the surface of the spring bracket (10), and the other end of the return spring (174) away from the spring bracket (10) is attached to the surface of the rubber preform (8).

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