An air-tight cable assembly

Abstract

The utility model discloses a kind of air-tight cable assemblies, it is related to cable technical field, including shell and screw sleeve, the inside fixed connection of screw sleeve has insulator, the side of insulator is inserted with pin. The utility model adopts above-mentioned structure, sealing flat pad guarantees the end surface sealing of shell and screw sleeve connecting place, first sealing ring enhances the sealing effect of shell and tail cover connecting place, second sealing ring realizes the close sealing of cable and tail cover, and the waterproof sealant filled between tail cover and cable body further strengthens the sealing of tail cover and cable tail gap, and by first adhesive sealing heat shrink tube and second adhesive sealing heat shrink tube, shell, tail cover, cable body are protected, multiple sealing synergistic effect, compared with the sealing mode of traditional single ordinary sealing ring, can all-round block the path of moisture and humidity invasion, significantly improve overall sealing performance, avoid the problems such as cable insulation layer aging, signal transmission interference caused by poor sealing.

Description

Technical Field

[0001] This utility model belongs to the field of cable technology, and specifically relates to an airtight cable assembly. Background Technology

[0002] In many industrial scenarios and special application environments, gas-tight cable assemblies play a crucial role. For example, in the aerospace field, they need to stably transmit signals and electrical energy in complex air pressure and temperature environments at high altitudes. In deep-sea exploration equipment, they need to withstand huge water pressure and resist seawater erosion to ensure that the internal circuits are effectively isolated from the external environment and maintain the normal operation of the equipment.

[0003] However, existing airtight cable assemblies have defects. In the sealing process, traditional sealing methods are difficult to meet the high airtightness requirements. For example, some cable assemblies rely on a single ordinary sealing ring, which has a poor sealing effect. Moisture and humidity can still easily penetrate along the gaps, causing unstable connections and seriously affecting the normal operation of the system. Utility Model Content

[0004] In view of the problems mentioned in the background art, the purpose of this utility model is to provide an airtight cable assembly to solve the problems mentioned in the background art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] An airtight cable assembly includes a housing and a threaded sleeve. An insulator is fixedly connected inside the threaded sleeve, and a pin is inserted into one side of the insulator. The threaded sleeve is fitted onto the outside of the housing. A welding sleeve is welded to one side of the housing, and a tail sleeve is fixedly connected to one side of the welding sleeve. An insulating gasket is provided inside the housing. A first sealing ring is fixedly connected to one side of the housing, and one side of the first sealing ring abuts against one side of the tail sleeve. A second sealing ring is fixedly connected to one side of the tail sleeve. A cable body is fixedly connected inside the housing, and one side of the cable body abuts against one side of the second sealing ring. Waterproof sealant is filled between the tail sleeve and the cable body on the side away from the second sealing ring. A protective component is fitted onto the outside of the housing. The cable body is composed of a double-layer PUR sheath.

[0007] As a preferred technical solution, the screw sleeve is internally fixedly connected with a retaining ring, and the screw sleeve is engaged with the outer shell through the retaining ring.

[0008] As a preferred technical solution, both the first sealing ring and the second sealing ring are O-ring structures.

[0009] As a preferred technical solution, the protection component includes a first adhesive-sealed heat shrink tube, which is sleeved on one side of the tail sleeve and fits against one side of the cable body. A second adhesive-sealed heat shrink tube is sleeved on the outer surface of the first adhesive-sealed heat shrink tube, and one side of the second adhesive-sealed heat shrink tube is sleeved on the tail sleeve and the outer shell.

[0010] As a preferred technical solution, the screw sleeve has an external thread on one side, and a hexagonal block is fixedly connected to the screw sleeve on the side of the external thread.

[0011] In summary, the present invention has the following main advantages:

[0012] This invention employs a multi-layered sealing structure. A sealing gasket ensures a sealed end face at the connection between the outer shell and the threaded sleeve. A first sealing ring enhances the sealing effect at the connection between the outer shell and the tail sleeve. A second sealing ring achieves a tight seal between the cable and the tail sleeve. Waterproof sealant filling the space between the tail sleeve and the cable body further strengthens the sealing of the gap between the tail sleeve and the cable tail. Furthermore, a first and a second adhesive-sealed heat shrink tubing provide protection for the outer shell, tail sleeve, and cable body. This multi-layered sealing works synergistically, effectively blocking the path of moisture and humidity intrusion compared to traditional single-ring sealing methods. This significantly improves overall sealing performance and avoids problems such as cable insulation aging and signal transmission interference caused by poor sealing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a utility model Figure 1 A magnified structural diagram at point A;

[0015] Figure 3 This is a utility model Figure 1 A magnified structural diagram at point B.

[0016] Reference numerals: 1. Pin; 2. Insulator; 3. Insulating gasket; 4. Housing; 5. Screw sleeve; 6. Welding sleeve; 7. Tail sleeve; 8. Snap ring; 9. Sealing flat gasket; 10. First sealing ring; 11. Second sealing ring; 12. Waterproof sealant; 13. First heat shrink tubing with adhesive; 14. Second heat shrink tubing with adhesive; 15. Cable body; 16. External thread; 17. Hexagonal block; 18. Protective assembly. Detailed Implementation

[0017] Example

[0018] refer to Figures 1 to 3This embodiment of an airtight cable assembly includes a housing 4 and a threaded sleeve 5. An insulator 2 is fixedly connected inside the threaded sleeve 5, and a pin 1 is inserted into one side of the insulator 2. The threaded sleeve 5 is fitted onto the outside of the housing 4. A welding sleeve 6 is welded to one side of the housing 4, and a tail sleeve 7 is fixedly connected to one side of the welding sleeve 6. An insulating gasket 3 is provided inside the housing 4. A first sealing ring 10 is fixedly connected to one side of the housing 4, and one side of the first sealing ring 10 abuts against one side of the tail sleeve 7. A second sealing ring 11 is fixedly connected to one side of the tail sleeve 7. A cable body 15 is fixedly connected inside the housing 4, and one side of the cable body 15 abuts against one side of the second sealing ring 11. Waterproof sealant 12 is filled between the tail sleeve 7 and the cable body 15 on the side away from the second sealing ring 11. A protective component is fitted onto the outside of the housing 4. The cable body 15 is composed of a double-layer PUR sheath. The sequential connection of the housing 4, welding sleeve 6, and tail sleeve 7 forms a structural frame, providing protection for the internal components. The cable body 15 with sheath, thanks to the strong adhesion of the PUR material and the inner braided layer, as well as the thick sheath, enhances both flexibility and sealing and durability.

[0019] refer to Figure 1 The screw sleeve 5 is internally fixedly connected with a retaining ring 8, and the screw sleeve 5 is engaged with the outer shell 4 through the retaining ring 8. During assembly, the screw sleeve 5 is sleeved on the outside of the outer shell 4 and engaged with the outer shell 4 through the retaining ring 8, so that the screw sleeve 5 and the outer shell 4 are tightly connected together and are not easy to move relative to each other. The engagement method is simple to operate and can quickly realize the assembly of the screw sleeve 5 and the outer shell 4, and avoid the screw sleeve 5 and the outer shell 4 from loosening.

[0020] refer to Figure 2-3 Both the first sealing ring 10 and the second sealing ring 11 are O-ring structures. The O-ring structure has good elasticity and sealing performance. When compressed, it can fully fit the connection surface, effectively fill the gap, and enhance the sealing effect between the outer shell 4 and the tail sleeve 7, and between the tail sleeve 7 and the cable body 15. Its structure is simple, low cost, and has high sealing reliability, and can maintain a good sealing state for a long time.

[0021] refer to Figure 1The protective component includes a first adhesive-sealed heat shrink tube 13, which is sleeved on one side of the tail sleeve 7 and in contact with one side of the cable body 15. A second adhesive-sealed heat shrink tube 14 is sleeved on the outer surface of the first adhesive-sealed heat shrink tube 13, and one side of the second adhesive-sealed heat shrink tube 14 is sleeved on the tail sleeve 7 and the outer shell 4. By setting the protective component, the first adhesive-sealed heat shrink tube 13 is sleeved on one side of the tail sleeve 7 and in contact with the cable body 15. The second adhesive-sealed heat shrink tube 14 is sleeved on the outer surface of the first adhesive-sealed heat shrink tube 13, and one side of the second adhesive-sealed heat shrink tube 14 is sleeved on the tail sleeve 7 and the outer shell 4. During installation, heating causes the adhesive-sealed heat shrink tube to shrink and tightly wrap around the corresponding part. The adhesive layer inside melts and bonds to the wrapped surface, improving the sealing of the area and playing a role in dust prevention and moisture prevention, thus extending the service life of the component.

[0022] refer to Figure 1 The threaded sleeve 5 has an external thread 16 on one side, and a hexagonal block 17 is fixedly connected to the threaded sleeve 5 on the side of the external thread 16. The external thread 16 on one side of the threaded sleeve 5 facilitates connection with other external equipment or components via threads. The hexagonal block 17 fixed to the threaded sleeve 5 on the side of the external thread 16 can be clamped with tools such as wrenches during assembly or disassembly, making it convenient to apply torque.

[0023] Operating principle and advantages: By setting a sealing gasket 9, the end face sealing at the connection between the outer shell 4 and the screw sleeve 5 is guaranteed. The first sealing ring 10 enhances the sealing effect at the connection between the outer shell and the tail sleeve 7. The second sealing ring 11 achieves a tight seal between the cable and the tail sleeve 7. The waterproof sealant 12 filled between the tail sleeve 7 and the cable body 15 further strengthens the sealing of the gap between the tail sleeve 7 and the cable tail. Furthermore, the outer shell 4, tail sleeve 7, and cable body 15 are protected by the first adhesive-sealed heat shrink tube 13 and the second adhesive-sealed heat shrink tube 14. The multiple sealing effects work together to block the path of moisture and humidity intrusion in all directions compared with the traditional single ordinary sealing ring method, significantly improving the overall sealing performance and avoiding problems such as cable insulation aging and signal transmission interference caused by poor sealing.

Claims

1. A gas-tight cable assembly, comprising a housing (4) and a threaded sleeve (5), characterized in that: An insulator (2) is fixedly connected inside the screw sleeve (5). A pin (1) is inserted into one side of the insulator (2). The screw sleeve (5) is fitted onto the outside of the outer shell (4). A welding sleeve (6) is welded to one side of the outer shell (4). A tail sleeve (7) is fixedly connected to one side of the welding sleeve (6). An insulating gasket (3) is provided inside the outer shell (4). A first sealing ring (10) is fixedly connected to one side of the outer shell (4). One side of the first sealing ring (10) is connected to one side of the tail sleeve (7). The tail sleeve (7) is fixedly connected to one side of a second sealing ring (11), and the cable body (15) is fixedly connected inside the outer shell (4). One side of the cable body (15) is in close contact with one side of the second sealing ring (11). Waterproof sealant (12) is filled between the tail sleeve (7) and the cable body (15) away from the second sealing ring (11). A protective component is fitted on the outside of the outer shell (4). The cable body (15) is composed of a double-layer PUR sheath.

2. The gas-tight cable assembly according to claim 1, characterized in that: The screw sleeve (5) is fixedly connected to the inside by a retaining ring (8), and the screw sleeve (5) is engaged with the outer shell (4) by the retaining ring (8).

3. The gas-tight cable assembly according to claim 1, characterized in that: Both the first sealing ring (10) and the second sealing ring (11) are O-type structures.

4. The gas-tight cable assembly according to claim 1, characterized in that: The protective component includes a first adhesive-sealed heat shrink tube (13), which is sleeved on one side of the tail sleeve (7) and fits against one side of the cable body (15).

5. A gas-tight cable assembly according to claim 4, characterized in that: The outer surface of the first adhesive-sealed heat shrink tube (13) is fitted with a second adhesive-sealed heat shrink tube (14), and one side of the second adhesive-sealed heat shrink tube (14) is fitted onto the tail sleeve (7) and the outer shell (4).

6. The gas-tight cable assembly according to claim 1, characterized in that: The threaded sleeve (5) has an external thread (16) on one side, and a hexagonal block (17) is fixedly connected to the threaded sleeve (5) on one side of the external thread (16).

Images