Metallic Luer

Abstract

The application relates to the technical field of cable fixing and sealing, in particular to a metal gland, which comprises a body, a through channel is arranged in the body, a limiting sleeve for fixing a cable is arranged in the through channel, the limiting sleeve is sleeved on a copper core, a tail end of the limiting sleeve is provided with an extrusion part, the extrusion part can be deformed under external force to form an interference fit with a cable outer sleeve, a first sealing groove is arranged on an inner wall of a middle part of the limiting sleeve, a first sealing ring is arranged in the first sealing groove, a second sealing groove is arranged on an outer wall of the limiting sleeve, a second sealing ring is arranged in the second sealing groove, and the second sealing ring is located between the body and the limiting sleeve. The application can effectively fix the cable, simultaneously enhances the sealing performance by using a multiple sealing structure, and improves the use stability.

Description

Technical Field

[0001] This application relates to the field of cable fixing and sealing technology, and in particular to a metal gland. Background Technology

[0002] Cable sealing joints, as key components for cable thread protection, occupy an important position in the field of cable sealing joint technology. With the continuous development of industry, their application scope is becoming increasingly wide, especially in cable thread sealing protection scenarios in the power, telecommunications, and petrochemical industries, where they play an indispensable role.

[0003] In existing technologies, conventional methods are typically employed to achieve cable sealing and securing. Among these, traditional metal cable glands are commonly used. Generally, traditional metal cable glands rely primarily on their structural design to achieve a certain level of sealing, such as using simple threaded connections and compression structures to secure the cable and prevent the ingress of external dust and moisture. Some also employ a single sealing component, such as a standard rubber ring, to enhance the sealing effect. Additionally, some traditional cable glands utilize precise control over the machining of metal components to ensure a tight fit with the cable, thereby achieving a degree of protection.

[0004] However, traditional metal cable glands have significant drawbacks. As industrial equipment demands increasingly higher levels of sealing and anti-aging properties, traditional metal cable glands can no longer meet the requirements for high protection levels. Their anti-aging performance is also insufficient, making them unsuitable for complex and harsh industrial environments. During long-term use, they are prone to sealing failure and aging damage, failing to provide reliable cable sealing protection. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this application provides a metal gland head, which fixes the cable by a limiting sleeve in the through channel, and the extrusion part deforms and is interference-fitted with the cable outer tube; a first sealing ring is provided in the first sealing groove, a second sealing ring is provided in the second sealing groove, and the second sealing ring is located between the body and the limiting sleeve, so as to achieve the effect of fixing and sealing.

[0006] This application is achieved through the following technical solution: A metal cable gland includes a body with a through channel and a limiting sleeve for fixing a cable. The limiting sleeve is fitted onto a copper core, and its tail end has a pressing part that can deform under external force to form an interference fit with the cable sheath. A first sealing groove is provided on the inner wall of the middle portion of the limiting sleeve, and a first sealing ring is provided in the first sealing groove. A second sealing groove is provided on the outer wall of the limiting sleeve, and a second sealing ring is provided in the second sealing groove. The second sealing ring is located between the body and the limiting sleeve.

[0007] By adopting the above technical solution, the limiting sleeve can fix the cable. The pressing part at the tail end of the limiting sleeve can deform under external force to form an interference fit with the cable outer sleeve, effectively preventing the cable from loosening or coming off and ensuring connection stability. The first sealing ring in the first sealing groove on the inner wall of the limiting sleeve can prevent dust and moisture from entering through the gap between the cable and the limiting sleeve, improving sealing performance. The second sealing ring in the second sealing groove on the outer wall of the limiting sleeve is located between the main body and the limiting sleeve, further enhancing the sealing between the main body and the limiting sleeve, reducing the impact of external factors on the cable, improving the overall protective performance and reliability of the metal gland, and extending the service life of the cable and equipment.

[0008] Optionally, the front end of the outer wall of the main body is provided with a first threaded portion, and the middle part of the outer wall of the main body is provided with a first positioning boss; the first threaded portion is threadedly connected to a first fastening nut; the assembly gap formed between the first fastening nut and the first positioning boss is used to fix the main body on the set mounting hole.

[0009] By adopting the above technical solution, a first threaded portion is provided at the front end of the outer wall of the main body, and a first positioning boss is provided in the middle. The first threaded portion is threadedly connected to a first fastening nut, forming an assembly gap between the first fastening nut and the first positioning boss. This assembly gap can firmly fix the main body on the designated mounting hole. This structural design facilitates the installation and positioning of the metal gland. The cooperation between the first threaded portion and the first fastening nut can achieve a tight connection, preventing the main body from shaking or loosening in the mounting hole. The first positioning boss plays a role in positioning and support, ensuring the accuracy and stability of installation, improving the overall installation quality and reliability of the metal gland, and extending its service life.

[0010] Optionally, the first positioning boss has a ring structure.

[0011] By adopting the above technical solution, the metal gland connector can better fit the mounting hole during installation. The first positioning boss of the annular structure provides uniform support force, making the body more firmly fixed in the mounting hole and avoiding shaking or loosening due to uneven force. In addition, this structure can also effectively prevent the body from shifting during use, ensuring the normal operation of the metal gland connector and guaranteeing the stability and reliability of the cable connection.

[0012] Optionally, the first positioning boss has a third sealing groove on its end face near the first threaded portion, and a third sealing ring is provided in the third sealing groove.

[0013] By adopting the above technical solution, the sealing performance of the metal gland can be effectively enhanced. When the body is fixed to the designated mounting hole via the first threaded part and the first fastening nut, the third sealing ring can fill the gap between the first positioning boss and the mounting hole, preventing external dust, moisture, and impurities from entering and avoiding damage to the internal cables. At the same time, the improved sealing performance also helps reduce cable aging and short circuits caused by external environmental factors, improving the stability and reliability of the metal gland, extending its service life, and ensuring the normal operation of the cables.

[0014] Optionally, the rear end of the outer wall of the main body is provided with a second threaded portion, and the second threaded portion is threadedly connected to a second fastening nut, which is used to fix the limiting sleeve on the main body.

[0015] By adopting the above technical solution, the second fastening nut can firmly fix the limiting sleeve to the body. This structural design enhances the connection stability between the various components of the metal gland, preventing the limiting sleeve from loosening or shifting during use. The stable connection ensures that the limiting sleeve can better perform its function of fixing the cable, keeping the cable in a stable position within the metal gland, thereby improving the overall performance and reliability of the metal gland, ensuring the normal operation of the cable, and making it suitable for various scenarios with high requirements for cable fixation.

[0016] Optionally, the inner wall of the second fastening nut is provided with an abutment portion, and the outer wall of the limiting sleeve is provided with a second positioning boss that matches the abutment portion.

[0017] By adopting the above technical solution, the connection stability between the limiting sleeve and the body can be enhanced. When the second fastening nut is tightened, the abutment part and the second positioning boss cooperate with each other to precisely fix the limiting sleeve on the body, preventing the limiting sleeve from loosening or shifting during use. This structural design allows the limiting sleeve to better fix the cable when installing cables in the metal gland, ensuring the stability of the cable within the metal gland, thereby improving the overall performance and reliability of the metal gland and ensuring stable operation in various environments.

[0018] Optionally, the front end cavity of the limiting sleeve is provided with an auxiliary limiting sleeve for fixing the cable shielding layer.

[0019] By adopting the above technical solution, the cable shielding layer can be securely fixed. This prevents the cable shielding layer from loosening or shifting during use, ensuring that it remains in good working condition. Secure fixing helps maintain the shielding effect against electromagnetic interference, improving the stability and reliability of signal transmission. This allows the cable to function normally in complex electromagnetic environments, reducing the impact of external electromagnetic interference on signal transmission, and ultimately enhancing the performance and stability of the entire device or system using the cable.

[0020] Optionally, a shoulder is provided on the side wall of the through channel, and a third positioning boss adapted to the shoulder is provided in the middle of the limiting sleeve; a bent putty filling gap is formed between the outer wall of the limiting sleeve located in front of the third positioning boss and the through channel.

[0021] By adopting the above technical solution, the position of the limiting sleeve within the through-channel of the main body can be accurately positioned, ensuring precise installation. Simultaneously, a gap is formed between the outer wall of the limiting sleeve at the front section of the third positioning boss and the through-channel, which can be filled with bending putty. After filling with bending putty, on the one hand, the sealing performance of the metal gland is further enhanced, preventing external dust and moisture from entering and damaging the cable; on the other hand, the bending putty also acts as a buffer and shock absorber, reducing the impact of external forces on the cable and improving its service life and stability.

[0022] Optionally, the outer wall of the limiting sleeve is provided with an installation groove, and a retaining spring is provided in the installation groove.

[0023] By adopting the above technical solution, the connection stability between the limiting sleeve and the main body can be effectively enhanced. The retaining spring prevents the limiting sleeve from axially shifting within the through-channel of the main body, ensuring that the limiting sleeve is always in the correct position, thereby ensuring its effective fixation of the cable. At the same time, the retaining spring can also buffer vibration and impact between the limiting sleeve and the main body to a certain extent, reducing component loosening or damage caused by vibration, improving the overall reliability and durability of the metal cable gland, enabling the metal cable gland to operate stably in various complex working environments, and ensuring the normal use and safety of the cable.

[0024] Optionally, the thickness of the extrusion section is no more than 1 mm.

[0025] By adopting the above technical solution, the extruded part can be more easily deformed under external force. Due to its thinner thickness, it has better flexibility and can more quickly and effectively form an interference fit with the cable sheath when subjected to external force. This interference fit can enhance the fixing effect on the cable and prevent the cable from loosening or shifting during use. At the same time, a good interference fit can also improve the sealing performance of the metal gland, reduce the ingress of dust, moisture and impurities, protect the cable and related equipment from the influence of the external environment, extend the service life of the cable and equipment, and ensure the stable operation of the entire system.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The extrusion part in this application can deform under external force to form an interference fit with the cable sheath, avoiding the problem of poor fixing effect caused by aging and deformation of ordinary plastic or rubber fixing sleeves, and achieving stable fixing of cables; 2. This application utilizes the first threaded portion to cooperate with the first fastening nut, and an assembly gap is formed between the first fastening nut and the first positioning boss, so that the body can be fixed on the set mounting hole to achieve stable installation of the body; 3. This application provides a first sealing ring and a second sealing ring in the first sealing groove and the second sealing groove respectively, which enhances the sealing between the cable and the body. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the body described in Embodiment 1; Figure 2 This is a schematic diagram of the shielding layer described in Embodiment 1; Figure 3 This is a schematic diagram of the extrusion section described in Embodiment 1; Figure 4 This is a schematic diagram of the structure of the first positioning boss in Embodiment 1; Figure 5 This is a schematic diagram of the structure of the first threaded portion in Embodiment 1; Figure 6 This is a schematic diagram of the structure of the first fastening nut in Embodiment 1; Figure 7 This is a schematic diagram of the limiting sleeve described in Embodiment 1.

[0028] In the diagram: 1. Body; 11. Through-channel; 111. Limiting sleeve; 1111. Extrusion part; 1112. First sealing groove; 1113. First sealing ring; 1114. Second sealing groove; 1115. Second sealing ring; 1116. Second positioning boss; 1117. Auxiliary limiting sleeve; 1118. Third positioning boss; 1119. Mounting groove; 1120. Snap ring; 112. Shoulder; 113. Gap; 12. Copper core; 13. Cable outer sheath; 14. First threaded part; 141. First fastening nut; 15. First positioning boss; 151. Third sealing groove; 1511. Third sealing ring; 16. Second threaded part; 161. Second fastening nut; 1611. Abutment part; 2. Mounting hole; 3. Shielding layer. Detailed Implementation

[0029] The technical solutions of various embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] Example 1 Reference Figures 1-3 This application discloses a metal cable gland, including a body 1, a through channel 11 inside the body 1, a limiting sleeve 111 for fixing a cable in the through channel 11, the limiting sleeve 111 being fitted onto a copper core 12, and the tail end of the limiting sleeve 111 having a pressing part 1111, the pressing part 1111 being deformable under external force to form an interference fit with the cable outer sheath 13; a first sealing groove 1112 is provided on the inner wall of the middle part of the limiting sleeve 111, and a first sealing ring 1113 is provided in the first sealing groove 1112; a second sealing groove 1114 is provided on the outer wall of the limiting sleeve 111, and a second sealing ring 1115 is provided in the second sealing groove 1114, the second sealing ring 1115 being located between the body 1 and the limiting sleeve 111.

[0031] Specifically, the through channel 11 is a channel that penetrates the main body 1, and its shape is usually circular, for the cable to pass through. The first sealing groove 1112 is provided on the inner wall of the middle part of the limiting sleeve 111, and its shape is annular, for placing the first sealing ring 1113. The first sealing ring 1113 can be made of silicone, which serves to seal the gap 113 between the cable and the limiting sleeve 111. The second sealing groove 1114 is provided on the outer wall of the limiting sleeve 111, and is also annular, for placing the second sealing ring 1115. The second sealing ring 1115 is located between the main body 1 and the limiting sleeve 111, enhancing the sealing between the limiting sleeve 111 and the main body 1.

[0032] Reference Figures 2-3The first positioning boss 15 has a third sealing groove 151 on its end face near the first threaded portion 14, and a third sealing ring 1511 is provided in the third sealing groove 151. The shape of the third sealing groove 151 is adapted to the third sealing ring 1511 and is used to place the third sealing ring 1511. The third sealing groove 151 and the third sealing ring 1511 enhance the sealing performance of the connection part. The third sealing ring 1511 can be made of rubber or other materials, and plays a sealing role to prevent dust and moisture from entering.

[0033] Reference Figure 3 The side wall of the through channel 11 is provided with a shoulder 112, and the middle of the limiting sleeve 111 is provided with a third positioning boss 1118 that matches the shoulder 112; the outer wall of the limiting sleeve 111 located in front of the third positioning boss 1118 forms a bent putty filling gap 113 between the outer wall of the limiting sleeve 111 and the through channel 11; the front end cavity of the limiting sleeve 111 is provided with an auxiliary limiting sleeve 1117 for fixing the cable shielding layer 3; the outer wall of the limiting sleeve 111 is provided with an installation groove 1119, and a retaining spring 1120 is provided in the installation groove 1119; the inner wall of the second fastening nut 161 is provided with an abutment part 1611, and the outer wall of the limiting sleeve 111 is provided with a second positioning boss 1116 that matches the abutment part 1611; the thickness of the pressing part 1111 is not greater than 1mm. A bendable sealant-filled gap 113 is formed between the outer wall of the limiting sleeve 111 located at the front end of the third positioning boss 1118 and the through channel 11. This gap can be filled with bendable sealant material to further enhance the sealing effect. The auxiliary limiting sleeve 1117 is usually made of plastic, but other materials can also be used. Its shape is adapted to the cable shielding layer 3, and it fixes the cable shielding layer 3 by compression, improving the cable's shielding performance. The retaining spring 1120 assists in fixing the limiting sleeve 111. The retaining spring 1120 has a ring structure, which helps to fix the limiting sleeve 111. When the second fastening nut 161 is tightened, the abutment part 1611 engages with the second positioning boss 1116 to achieve axial fixation of the limiting sleeve 111. The thin design of the compression part 1111 allows it to deform under external force, forming an interference fit with the cable outer sheath 13, thereby firmly fixing the cable. The extrusion part 1111 can be made of plastic or other materials, but it must be ensured that the extrusion part 1111 can deform under external force.

[0034] Reference Figures 2-4The outer wall of the main body 1 has a first threaded portion 14 at its front end and a first positioning boss 15 at its middle. A first fastening nut 141 is threaded onto the first threaded portion 14. An assembly gap 113 formed between the first fastening nut 141 and the first positioning boss 15 is used to fix the main body 1 onto a designated mounting hole 2. The first threaded portion 14, located at the front end of the outer wall of the main body 1, is characterized by its external thread, allowing it to be threadedly connected to the first fastening nut 141 for connection with an external structure. The first positioning boss 15, located at the middle of the outer wall of the main body 1, cooperates with the first fastening nut 141 to form the assembly gap 113, fixing the main body 1 onto the designated mounting hole 2. The first positioning boss 15 serves both positioning and forming the assembly gap 113.

[0035] Reference Figure 4 The first positioning boss 15 has a ring-shaped structure. The ring-shaped structure makes it easier to align with the mounting hole 2 during assembly, reducing installation difficulty and improving installation efficiency.

[0036] Reference Figures 5-7 The outer wall of the main body 1 has a second threaded portion 16 at the rear end, and the second threaded portion 16 is threadedly connected to a second fastening nut 161. The second fastening nut 161 is used to fix the limiting sleeve 111 onto the main body 1. The second threaded portion 16 is located at the rear end of the outer wall of the main body 1 and has external threads, which can be threadedly connected to the second fastening nut 161 to fix the limiting sleeve 111.

[0037] The implementation principle of this embodiment is as follows: the metal gland head, through the combined design of the body 1 and the limiting sleeve 111, achieves stable fixation and multiple seals for the cable. The first threaded portion 14 and the first positioning boss 15 on the body 1 cooperate with the first fastening nut 141 to fix the body 1 on the mounting hole 2. The third sealing groove 151 and the third sealing ring 1511 enhance the sealing of the connection part. The second threaded portion 16 cooperates with the second fastening nut 161 to fix the limiting sleeve 111. The extrusion portion 1111 on the limiting sleeve 111 fixes the cable by deformation. The sealing rings in the first sealing groove 1112 and the second sealing groove 1114 respectively achieve the sealing between the cable and the limiting sleeve 111, and between the limiting sleeve 111 and the body 1. The second positioning boss 1116 cooperates with the abutment portion 1611 to achieve axial fixation. The filling gap 113 formed by the third positioning boss 1118 and the shoulder 112 can further enhance the seal and assist the limiting sleeve 1117 in fixing the cable shielding layer 3.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this application.

Claims

1. A metal gland, characterized in that: The device includes a main body (1), which has a through channel (11) and a limiting sleeve (111) for fixing the cable. The limiting sleeve (111) is fitted onto the copper core (12), and the tail end of the limiting sleeve (111) has a pressing part (1111). The pressing part (1111) can deform under external force to form an interference fit with the cable outer tube (13). The inner wall of the middle part of the limiting sleeve (111) has a first sealing groove (1112), and a first sealing ring (1113) is provided in the first sealing groove (1112). The outer wall of the limiting sleeve (111) has a second sealing groove (1114), and a second sealing ring (1115) is provided in the second sealing groove (1114). The second sealing ring (1115) is located between the main body (1) and the limiting sleeve (111).

2. A metal gland according to claim 1, characterized in that: The front end of the outer wall of the body (1) is provided with a first threaded part (14), and the middle part of the outer wall of the body (1) is provided with a first positioning boss (15); the first threaded part (14) is threadedly connected to a first fastening nut (141); the assembly gap (113) formed between the first fastening nut (141) and the first positioning boss (15) is used to fix the body (1) on the set mounting hole (2).

3. A metal gland according to claim 2, characterized in that: The first positioning boss (15) has a ring structure.

4. A metal gland according to claim 2, characterized in that: The first positioning boss (15) has a third sealing groove (151) on its end face near the first threaded part (14), and a third sealing ring (1511) is provided in the third sealing groove (151).

5. A metal gland according to claim 1, characterized in that: The outer rear end of the body (1) is provided with a second threaded part (16), and the second threaded part (16) is threadedly connected to a second fastening nut (161). The second fastening nut (161) is used to fix the limiting sleeve (111) on the body (1).

6. A metal gland according to claim 5, characterized in that: The inner wall of the second fastening nut (161) is provided with an abutment (1611), and the outer wall of the limiting sleeve (111) is provided with a second positioning boss (1116) that is adapted to the abutment (1611).

7. A metal gland according to claim 1, characterized in that: The front end cavity of the limiting sleeve (111) is provided with an auxiliary limiting sleeve (1117) for fixing the cable shielding layer (3).

8. A metal gland according to claim 1, characterized in that: The side wall of the through channel (11) is provided with a shoulder (112), and the middle part of the limiting sleeve (111) is provided with a third positioning boss (1118) that is adapted to the shoulder (112); a bending putty filling gap (113) is formed between the outer wall of the limiting sleeve (111) located in front of the third positioning boss (1118) and the through channel (11).

9. A metal gland according to claim 1, characterized in that: The outer wall of the limiting sleeve (111) is provided with an installation groove (1119), and a retaining ring (1120) is provided in the installation groove (1119).

10. A metal gland according to claim 1, characterized in that: The thickness of the extrusion part (1111) is no more than 1 mm.

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