Automatic sealing device for cable head

Abstract

The invention relates to the technical field of cable head sealing devices, in particular to a cable head automatic sealing device. According to the technical scheme, the cable head sealing device comprises a sealing cylinder and further comprises an external thread sleeve and an internal thread sleeve, when a cable head is sealed, the internal thread sleeve is screwed on the side wall of the external thread sleeve, and the external thread sleeve is fixedly connected to the end of the sealing cylinder through a connecting ring; and the sealing piece is attached to the outer wall of the cable under the extrusion action of the pressing piece. The cable head sealing device is ingenious in structural design and convenient to operate, after the inner threaded sleeve is screwed on the side wall of the outer threaded sleeve, sealing of the cable head is preliminarily completed, the device is fixed to the side wall of the cable, after the inner threaded sleeve is screwed, the pneumatic mechanism is automatically triggered, then the annular air bag is triggered to expand, and the cable head is sealed. The sealing effect on the cable head is further completed, the dual-sealing effect is achieved, and the cable cannot be damaged; the device can be detached and reused after being used, and is safe and environment-friendly.

Description

Technical Field

[0001] This application relates to the field of cable head sealing devices, and more particularly to automatic cable head sealing devices. Background Technology

[0002] Cables are wire products used to transmit electrical energy, information, and convert electromagnetic energy. They are typically made of one or more insulated conductors and an outer insulating protective layer. Reeled cables are usually stored in warehouses or outdoors, and after being cut, the cable ends are exposed to the air. In rainy or humid environments, these exposed cable ends are easily affected by moisture. Moisture at the cable ends can have many negative impacts on their performance and safety, potentially leading to decreased insulation performance, electrical faults, and even safety accidents. Therefore, waterproofing and moisture protection of cable ends are extremely important.

[0003] Traditional sealing structures use cable caps that are heated and shrinked to achieve a tight connection between the cap and the cable, isolating air. This device consists of three components: the cable cap, the heating clip, and the control box. The control box contains a built-in lithium battery and control switch, providing power to the heating clip and controlling its operation. The heating clip's functional part is a copper arc-shaped heating element with a built-in DC heating wire, externally insulated with asbestos and fixed to the end of a bracket. A tension spring is installed at the handle of the heating clip, keeping it closed. Squeezing the handle opens the heating head, completing the cap heat-shrinking process. The heating clip and control box are quickly connected via an aviation connector, facilitating portability and replacement of different sizes of heating clips. Different sizes of heating clips have different arc specifications for their copper heating blocks. One size of heating clip can be used for several different cable sizes (cable diameter difference ≤ 10mm), allowing selection of the appropriate size heating clip based on the cable specifications. However, this sealing device poses a risk of burns, and improper use still presents safety hazards. Furthermore, it is not easily reusable.

[0004] To address the aforementioned technical issues, a sealing device has been designed on the market that employs an end-face sealing method. It seals the cut cable end face by compressing a sealing rubber layer. This sealing device consists of four parts: a compression cap, sealing rubber, a cable sheath, and a tightening screw. In use, the tightening screw is first tightened to secure the cable sheath to the cable, and then the compression cap is tightened to seal the cut cable end face. It is reusable. It exhibits good sealing performance during use, meeting the required sealing standards. However, during the sealing of cable ends, it was found that a certain degree of flatness is required for the cut cable end face. The operation is not entirely simple, and there are still some difficulties in sealing uneven cable ends.

[0005] To address this problem, this application proposes an automatic cable head sealing device. Summary of the Invention

[0006] The purpose of this application is to address the technical problems identified in the background section by providing an automatic cable head sealing device.

[0007] The technical solution of this application: an automatic cable head sealing device, including a sealing cylinder, and further comprising: When sealing the cable head, the internal threaded sleeve is tightened onto the side wall of the external threaded sleeve, and the external threaded sleeve is fixedly connected to the end of the sealing cylinder by a connecting ring. The end of the internally threaded sleeve away from the sealing cylinder is fixedly connected to a clamping element; A clamping jaw is connected to the outer end of an external threaded sleeve. The clamping jaw has a sealing element inside. The sealing element is pressed against the outer wall of the cable by the pressing element. An airbag is embedded in the inner side of the sealing element, and a pneumatic mechanism for controlling the air pressure of the airbag is provided on the connecting ring. The pneumatic mechanism is driven by the movement of the internal threaded sleeve, which triggers the inflation of the airbag component to automatically seal the cable head.

[0008] Preferably, the clamping member includes a clamping ring fixedly connected to the end of the internal threaded sleeve, and the inner ring of the clamping ring near the end of the internal threaded sleeve is configured as an arc-shaped portion; The inner diameter of the arc-shaped part is smaller than the inner diameter of the internal threaded sleeve.

[0009] Preferably, the gripper includes a connecting ring fixedly connected to the outer end of the external threaded sleeve, and the outer end of the connecting ring is fixedly connected with a plurality of clamping claws arranged in a ring. The clamping claws are resilient and made of polypropylene. When the internal threaded sleeve is tightened onto the side wall of the external threaded sleeve, the pressure ring is pressed tightly against the outer wall of several clamping claws, causing the clamping claws to squeeze the sealing element and adhere it to the outer wall of the cable.

[0010] Preferably, the sealing element includes a sealing ring fixedly connected to the side wall of the connecting ring, and a sealing ring is fixedly connected to the end of the sealing ring away from the connecting ring, and the sealing ring is located inside a plurality of clamping claws.

[0011] Preferably, the airbag component includes an annular groove formed in the inner wall of the sealing ring, and an annular airbag is embedded in the annular groove; The annular airbag inflates and deflates, and when inflated, it adheres tightly to the outer wall of the cable, providing a tight seal for the cable head.

[0012] Preferably, the pneumatic mechanism includes an air passage formed in the connecting ring, the external threaded sleeve, the sealing ring, and the sealing ring. The connecting ring has an annular air cavity inside, and the air passage communicates with the annular air cavity. An air supply pipe is inserted into both the sealing ring and the sealing ring. The air supply pipe is located in the air passage, and one end of the air supply pipe extends into the annular air bladder. A piston ring is slidably connected inside the annular air chamber. Several connecting rods are fixedly connected to the end of the piston ring away from the air passage opening. The ends of the connecting rods away from the piston ring all slide through the connecting ring and are connected to an annular plate.

[0013] Preferably, a limiting element is provided between the internal threaded sleeve and the connecting ring, and the internal threaded sleeve is limited after being unscrewed by the limiting element.

[0014] Preferably, the limiting component includes a connecting ring rotatably connected to the outer wall of the internal threaded sleeve. A plurality of limiting rods are connected to one end of the connecting ring near the sealing cylinder. A plurality of protrusions are provided on the outer wall of the connecting ring. The number of protrusions corresponds to the number of limiting rods. The plurality of limiting rods slide through the plurality of protrusions respectively, and the free ends of the plurality of limiting rods are all fixedly connected to a connecting block.

[0015] Preferably, the connecting block is provided with a return auxiliary component that triggers the return of the annular plate; The return auxiliary component includes a through hole in the side wall of the protrusion. A push rod is fixedly connected to the side of the connecting block near the protrusion. When the connecting block moves closer to the protrusion, the push rod passes through the through hole and pushes the annular plate away from the protrusion.

[0016] Preferably, the internal threaded sleeve and the outer wall of the compression ring are jointly fixedly fitted with a fixing sleeve, and the fixing sleeve is provided with a locking mechanism for circumferential positioning of the connecting ring; The locking mechanism includes several screws threaded through the fixed sleeve. A torsion block is fixedly connected to the end of the screw away from the connecting ring, and a clamping plate is fixedly connected to the end of the screw near the connecting ring. When the clamping plate abuts against the side wall of the connecting ring, the connecting ring remains fixed relative to the internal threaded sleeve.

[0017] Compared with the prior art, this application has the following beneficial technical effects: In this application, an external threaded sleeve is provided at the end of the sealing cylinder. The end of the external threaded sleeve is connected to the sealing element through a clamping claw. The sealing ring is located inside several clamping claws. When sealing the cable head, the internal threaded sleeve is tightened on the side wall of the external threaded sleeve. The clamping element at the end of the internal threaded sleeve is pressed against the outer wall of several clamping claws. Several clamping claws are tightly fitted on the outer wall of the sealing ring, so that the sealing ring is fixed on the outer wall of the cable. This quickly achieves the function of fixing and sealing the cable head, and the operation difficulty coefficient is low. By incorporating an airbag within the inner wall of the sealing ring and a pneumatic mechanism within the connecting ring, tightening the internal threaded sleeve automatically triggers the pneumatic mechanism to inflate the annular airbag, causing it to expand to a certain extent. The annular airbag is positioned at the outer end of the sealing ring. Once inflated, it adheres tightly to the outer wall of the cable, preventing water from seeping in from the outer edge of the sealing ring, thus automatically achieving a further seal. This ensures excellent waterproofing even when the cable head is submerged. Loosening the internal threaded sleeve allows the annular plate to reset under the action of a return auxiliary component, thereby deflating the annular airbag. This facilitates removal of the device from the cable head, making it reusable and less prone to damage. By setting a locking mechanism on the fixed sleeve, when the device is tightened to completely seal the cable head, the locking mechanism can position the connecting ring, thereby making the inner threaded sleeve securely fitted on the side wall of the outer threaded sleeve, avoiding loosening and improving the stability of the entire device. In summary, the cable head sealing device of this application has an ingenious structural design and is easy to operate. After tightening the inner threaded sleeve onto the side wall of the outer threaded sleeve, the initial sealing of the cable head is completed, fixing the device to the side wall of the cable. Tightening the inner threaded sleeve automatically triggers the pneumatic mechanism, which in turn triggers the expansion of the annular airbag, further completing the sealing of the cable head and achieving a double sealing effect without damaging the cable. The device can be disassembled and reused after use, making it safe and environmentally friendly. Attached Figure Description

[0018] Figure 1 This is a 3D view of an automatic cable head sealing device; Figure 2 yes Figure 1 Rear-view stereoscopic view; Figure 3 yes Figure 2 A sectional view; Figure 4 It is in this application Figure 3 A magnified structural diagram at point A; Figure 5 It is in this application Figure 3 A magnified structural diagram at point B; Figure 6 It is in this application Figure 2 A magnified structural diagram at point C; Figure 7 This is a schematic diagram of the connection structure between the sealing cylinder and the connecting ring in this application; Figure 8 This is a schematic diagram of the connection structure between the locking mechanism and the fixed sleeve in this application.

[0019] Reference numerals: 1. Sealing cylinder; 2. Connecting ring; 3. Protrusion; 4. External threaded sleeve; 5. Internal threaded sleeve; 6. Return auxiliary component; 61. Through hole; 62. Push rod; 7. Clamping component; 71. Clamping ring; 72. Arc-shaped part; 8. Clamping jaws; 81. Connecting ring; 82. Clamping jaws; 9. Sealing element; 91. Sealing ring; 92. Sealing ring; 10. Airbag component; 101. Annular groove; 102. Annular airbag; 103. Air delivery pipe; 11. Pneumatic mechanism; 111. Annular air chamber; 112. Piston ring; 113. Air passage; 114. Connecting rod; 115. Annular plate; 12. Limiting component; 121. Limiting rod; 122. Connecting ring; 123. Connecting block; 13. Fixing sleeve; 14. Locking mechanism; 141. Screw; 142. Pressure plate; 143. Torque block. Detailed Implementation

[0020] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0022] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] Example like Figures 1-8 As shown, the automatic cable head sealing device proposed in this application includes a sealing cylinder 1, and further includes an external threaded sleeve 4 and an internal threaded sleeve 5. When sealing the cable head, the internal threaded sleeve 5 is tightened onto the side wall of the external threaded sleeve 4. The external threaded sleeve 4 is fixedly connected to the end of the sealing cylinder 1 through a connecting ring 2. The connecting ring 2 is fixedly connected to the open end of the sealing cylinder 1, and the connection between the connecting ring 2 and the sealing cylinder 1 is tightly fitted to maintain a sealed connection. The external threaded sleeve 4 is fixedly connected to the inner wall of the connecting ring 2, and the connection between the external threaded sleeve 4 and the connecting ring 2 is also in a sealed state.

[0026] The internal threaded sleeve 5 is fixedly connected to a clamping member 7 at its end away from the sealing cylinder 1. Specifically, the clamping member 7 includes a clamping ring 71 fixedly connected to the end of the internal threaded sleeve 5. The inner ring of the clamping ring 71 near the end of the internal threaded sleeve 5 is configured as an arc-shaped portion 72, and the inner diameter of the arc-shaped portion 72 is smaller than the inner diameter of the internal threaded sleeve 5. The outer end of the external threaded sleeve 4 is connected to a clamping member 8. A sealing member 9 is provided inside the clamping member 8. The sealing member 9 is pressed against the outer wall of the cable by the clamping member 7. The clamping member 8 includes a connecting ring 81 fixedly connected to the outer end of the external threaded sleeve 4. Several clamping claws 82 arranged in a ring are fixedly connected to the outer end of the connecting ring 81. The clamping claws 82 are tough and made of polypropylene. They can undergo plastic deformation under external force and are not easy to break. They can spring back when no external force is applied. When the internal threaded sleeve 5 is tightened onto the side wall of the external threaded sleeve 4, the clamping ring 71 is pressed tightly against the outer wall of the clamping claws 82, causing the clamping claws 82 to compress the sealing element 9 against the outer wall of the cable. The inner ring of the clamping ring 71 near the end of the internal threaded sleeve 5 is designed as an arc-shaped portion 72 to allow the clamping ring 71 to slide smoothly onto the outer wall of the clamping claws 82.

[0027] The sealing element 9 includes a sealing ring 91 fixedly connected to the side wall of the connecting ring 81. A sealing ring 92 is fixedly connected to the end of the sealing ring 91 away from the connecting ring 81. The sealing ring 92 is located inside a plurality of clamping claws 82, and the sealing ring 92 is a rubber ring that has a good sealing effect when it is in close contact with the outer wall of the cable.

[0028] Furthermore, an airbag 10 is embedded in the inner side of the sealing member 9, and a pneumatic mechanism 11 for controlling the air pressure of the airbag 10 is provided on the connecting ring 2. The pneumatic mechanism 11 is driven by the movement of the internal threaded sleeve 5 to trigger the airbag 10 to expand, further sealing the outer end of the sealing ring 92, thereby automatically completing the deep sealing of the cable head and preventing water from seeping into the sealing ring 92.

[0029] Specifically, the airbag component 10 includes an annular groove 101 formed on the inner wall of the sealing ring 92. An annular airbag 102 is embedded in the annular groove 101, and the inner wall of the annular airbag 102 is fixedly connected to the annular groove 101. The annular airbag 102 has good plastic deformation properties and will not leak after repeated expansion and contraction. The annular airbag 102 inflates and deflates, and when inflated, it fits tightly against the outer wall of the cable, providing a tight seal for the cable head. The pneumatic mechanism 11 includes air passages 113 formed within the connecting ring 2, the external threaded sleeve 4, the sealing ring 91, and the sealing ring 92. Several air passages 113 are provided, each continuous and independent. An annular air chamber 111 is formed inside the connecting ring 2, and the air passages 113 communicate with the annular air chamber 111. Several air supply pipes 103 are inserted into both the sealing ring 91 and the sealing ring 92, each located within one of the air passages 113, with one end extending into the annular air bladder 102. A piston ring 112 is slidably connected within the annular air chamber 111. Several connecting rods 114 are fixedly connected to one end of the piston ring 112 away from the opening of the air passage 113. The ends of the connecting rods 114 away from the piston ring 112 slidably pass through the connecting ring 2 and are connected to an annular plate 115. The thickness of the piston ring 112 is greater than the inner diameter of the air passage 113. When the piston ring 112 is pushed to one side of the annular air chamber 111 for inflation, the piston ring 112 is located at the port of the air passage 113, which can block the air passage 113 and thus avoid air leakage after inflation.

[0030] In this application, a limiting member 12 is provided between the internal threaded sleeve 5 and the connecting ring 2 to limit the internal threaded sleeve 5 after it is unscrewed. The limiting member 12 includes a connecting ring 122 rotatably connected to the outer wall of the internal threaded sleeve 5. A plurality of limiting rods 121 are connected to the end of the connecting ring 122 near the sealing cylinder 1. A plurality of protrusions 3 are provided on the outer wall of the connecting ring 2. The number of protrusions 3 corresponds to the number of limiting rods 121. The plurality of limiting rods 121 slide through the plurality of protrusions 3 respectively, and the free ends of the plurality of limiting rods 121 are fixedly connected to connecting blocks 123, wherein the free ends of the limiting rods 121 refer to the ends away from the connecting ring 122. A return auxiliary member 6 for triggering the return of the annular plate 115 is provided on the connecting block 123. The return auxiliary component 6 includes a through hole 61 on the side wall of the protrusion 3. A push rod 62 is fixedly connected to the side of the connecting block 123 near the protrusion 3. When the connecting block 123 moves closer to the protrusion 3, the push rod 62 passes through the through hole 61 and pushes the annular plate 115 away from the protrusion 3, causing the auxiliary airbag component 10 to deflate and retract.

[0031] The internal threaded sleeve 5 and the outer wall of the clamping ring 71 are jointly fixedly fitted with a fixing sleeve 13. The fixing sleeve 13 is provided with a locking mechanism 14 for circumferential positioning of the connecting ring 122. The locking mechanism 14 includes a plurality of screws 141 threaded through the fixing sleeve 13. A torsion block 143 is fixedly connected to the end of the screw 141 away from the connecting ring 122, and a clamping plate 142 is fixedly connected to the end of the screw 141 near the connecting ring 122. When the clamping plate 142 abuts against the side wall of the connecting ring 122, the connecting ring 122 remains fixed relative to the internal threaded sleeve 5. Preferably, there are two sets of locking mechanisms 14. The clamping plate 142 has anti-slip particles on the side near the connecting ring 122. When the device is tightened to completely seal the cable head, the locking mechanism 14 can position the connecting ring 122, thereby making the inner threaded sleeve 5 securely fitted on the side wall of the outer threaded sleeve 4, avoiding loosening and improving the stability of the entire device.

[0032] The working principle of this embodiment is as follows: the clamping member 7 is oriented towards the cable, so that the cable end is accommodated inside the sealing cylinder 1. Then, the internal threaded sleeve 5 is rotated to tighten the internal threaded sleeve 5 onto the side wall of the external threaded sleeve 4. After the internal threaded sleeve 5 is tightened onto the side wall of the external threaded sleeve 4, the clamping ring 71 will abut against the outer wall of several clamping claws 82. The clamping claws 82 are made of polypropylene and have good toughness. Under the compression of the clamping ring 71, they will deform towards the sealing ring 92 and tightly adhere to the outer wall of the sealing ring 92. This makes the sealing ring 92 tightly adhere to the outer wall of the cable, so that the device is fixed to the outer wall of the cable and plays a preliminary sealing role.

[0033] During the tightening of the internal threaded sleeve 5, the end of the internal threaded sleeve 5 will automatically squeeze the annular plate 115 to move towards the connecting ring 2. During the movement, the annular plate 115 will push several connecting rods 114 to move towards the connecting ring 2, thereby pushing the piston ring 112 to move. This causes the gas in the annular air chamber 111 to enter several air supply pipes 103 through several air passages 113, and finally enter the annular air bag 102, causing the annular air bag 102 to expand. After the annular air bag 102 expands, it will tightly adhere to the outer wall of the cable, further sealing the cable head and effectively preventing water from seeping in from the end of the sealing ring 92.

[0034] The limiting element 12 in this application serves to connect and position the internal threaded sleeve 5. The connecting ring 122 is rotatably mounted on the side wall of the internal threaded sleeve 5, which does not obstruct the screwing action of the internal threaded sleeve 5 and also provides axial positioning for the internal threaded sleeve 5. When tightening the internal threaded sleeve 5, several limiting rods 121 slide towards the sealing cylinder 1. After the internal threaded sleeve 5 is fully tightened, the two torsion blocks 143 are rotated in sequence to screw the two screws 141 towards the connecting ring 122. Finally, the two clamping plates 142 abut against the side wall of the connecting ring 122, thereby positioning the connecting ring 122 and fixing it circumferentially relative to the internal threaded sleeve 5. Due to the circumferential positioning of the connecting ring 122 by several limiting rods 121, the circumferential positioning of the internal threaded sleeve 5 is finally achieved, so that the internal threaded sleeve 5 is stably fitted onto the side wall of the external threaded sleeve 4, thereby improving the sealing stability of the entire device.

[0035] The device can be reused after being removed. The specific operation is as follows: First, loosen the two screws 141 to disengage the two clamping plates 142 from the connecting ring 122. Then, unscrew the internal threaded sleeve 5 in the opposite direction to disengage the internal threaded sleeve 5 from the external threaded sleeve 4 and the clamping claw 8. At this time, the clamping ring 71 stops clamping the several clamping claws 82, and the sealing ring 92 also begins to loosen. Continue pulling the internal threaded sleeve 5 away from the sealing cylinder 1. Under the drive of several limiting rods 121, several connecting blocks 123 respectively abut (contact) the side walls of several protrusions 3. At this time, several push rods 62 respectively pass through several through holes 61, and several push rods 62 will push the annular plate 115, causing the annular plate 115 to move away from the connecting ring 2. During the movement, the annular plate 115 pulls the piston ring 112 through several connecting rods 114. After the piston ring 112 moves, the annular air chamber 111 is in a negative pressure state, which will draw the gas in the annular airbag 102 into several air passages 113 through several air supply pipes 103, and finally be sucked back into the annular air chamber 111, thereby causing the annular airbag 102 to deflate and retract, ending the sealing of the cable. The next step is to remove the device to one side. The entire disassembly process is simple and will not damage the parts of the device.

[0036] The above specific embodiments are merely preferred embodiments of this application. Based on the technical solutions of this application and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments. The above specific embodiments are merely explanations of this application and are not limitations on this application.

Claims

1. An automatic sealing device for cable heads, comprising a sealing cylinder (1), characterized in that, Also includes: When sealing the cable head, the internal threaded sleeve (5) is tightened onto the side wall of the external threaded sleeve (4), and the external threaded sleeve (4) is fixedly connected to the end of the sealing cylinder (1) by the connecting ring (2). The end of the internal threaded sleeve (5) away from the sealing cylinder (1) is fixedly connected to a clamping member (7). A gripper (8) is connected to the outer end of the external threaded sleeve (4). A seal (9) is provided inside the gripper (8). The seal (9) is pressed against the outer wall of the cable under the squeezing action of the clamping member (7). An airbag (10) is embedded in the inner side of the sealing element (9), and a pneumatic mechanism (11) for controlling the air pressure of the airbag (10) is provided on the connecting ring (2). The pneumatic mechanism (11) is driven by the movement of the internal threaded sleeve (5) to trigger the airbag (10) to expand and automatically seal the cable head.

2. The automatic cable head sealing device according to claim 1, characterized in that, The clamping member (7) includes a clamping ring (71) fixedly connected to the end of the internal threaded sleeve (5), and the inner ring of the clamping ring (71) near the end of the internal threaded sleeve (5) is set as an arc-shaped part (72). The inner diameter of the arc-shaped part (72) is smaller than the inner diameter of the internal threaded sleeve (5).

3. The automatic cable head sealing device according to claim 2, characterized in that, The clamping claw (8) includes a connecting ring (81) fixedly connected to the outer end of the external threaded sleeve (4), and the outer end of the connecting ring (81) is fixedly connected with a number of clamping claws (82) arranged in a ring. The clamping claws (82) are resilient. When the internal threaded sleeve (5) is tightened on the side wall of the external threaded sleeve (4), the pressure ring (71) is pressed against the outer wall of several clamping claws (82), so that several clamping claws (82) squeeze the sealing element (9) to fit against the outer wall of the cable.

4. The automatic cable head sealing device according to claim 3, characterized in that, The sealing element (9) includes a sealing ring (91) fixedly connected to the side wall of the connecting ring (81). A sealing ring (92) is fixedly connected to one end of the sealing ring (91) away from the connecting ring (81). The sealing ring (92) is located inside a plurality of clamping claws (82).

5. The automatic cable head sealing device according to claim 4, characterized in that, The airbag component (10) includes an annular groove (101) formed on the inner wall of the sealing ring (92), and an annular airbag (102) is embedded in the annular groove (101). The annular airbag (102) inflates and deflates, and when inflated, it adheres tightly to the outer wall of the cable, providing a tight seal for the cable head.

6. The automatic cable head sealing device according to claim 5, characterized in that, The pneumatic mechanism (11) includes an air passage (113) opened in the connecting ring (2), the external threaded sleeve (4), the sealing ring (91), and the sealing ring (92). The connecting ring (2) has an annular air chamber (111) inside. The air passage (113) communicates with the annular air chamber (111). The sealing ring (91) and the sealing ring (92) are connected together by an air supply pipe (103). The air supply pipe (103) is located in the air passage (113), and one end of the air supply pipe (103) extends into the annular airbag (102). A piston ring (112) is slidably connected inside the annular air chamber (111). A number of connecting rods (114) are fixedly connected to one end of the piston ring (112) away from the air passage (113). The ends of the connecting rods (114) away from the piston ring (112) all slide through the connecting ring (2) and are connected to an annular plate (115).

7. The automatic cable head sealing device according to claim 6, characterized in that, A limiting element (12) is provided between the internal threaded sleeve (5) and the connecting ring (2) to limit the internal threaded sleeve (5) after it is unscrewed by the limiting element (12).

8. The automatic cable head sealing device according to claim 7, characterized in that, The limiting component (12) includes a connecting ring (122) rotatably connected to the outer wall of the internal threaded sleeve (5). The end of the connecting ring (122) near the sealing cylinder (1) is connected to several limiting rods (121). The outer wall of the connecting ring (2) is provided with several protrusions (3). The number of protrusions (3) corresponds to the number of limiting rods (121). Several limiting rods (121) slide through several protrusions (3) respectively, and the free ends of several limiting rods (121) are all fixedly connected to connecting blocks (123).

9. The automatic cable head sealing device according to claim 8, characterized in that, The connecting block (123) is provided with a return auxiliary component (6) for triggering the return of the ring plate (115). The return auxiliary component (6) includes a through hole (61) on the side wall of the protrusion (3). A push rod (62) is fixedly connected to the side of the connecting block (123) near the protrusion (3). When the connecting block (123) moves close to the protrusion (3), the push rod (62) passes through the through hole (61) and pushes the annular plate (115) away from the protrusion (3).

10. The automatic cable head sealing device according to claim 8, characterized in that, The inner threaded sleeve (5) and the outer wall of the compression ring (71) are jointly fixedly fitted with a fixing sleeve (13), and the fixing sleeve (13) is provided with a locking mechanism (14) for circumferential positioning of the connecting ring (122). The locking mechanism (14) includes a plurality of screws (141) threaded through the fixing sleeve (13). A torsion block (143) is fixedly connected to the end of the screw (141) away from the connecting ring (122), and a pressure plate (142) is fixedly connected to the end of the screw (141) close to the connecting ring (122). When the pressure plate (142) abuts against the side wall of the connecting ring (122), the connecting ring (122) remains fixed relative to the internal threaded sleeve (5).

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