A low-altitude economical cable connection device

Abstract

The present invention is applicable to the field of cable connection technology, and provides a low-altitude economical cable connection device, including a device body, a plurality of arc-shaped grooves for plugging in cable conductors are provided on both sides of the middle part of the device body, a plurality of conductive seats are distributed circumferentially in the middle part and connected to the arc-shaped grooves, a plurality of positioning grooves for limiting the inner sheath are provided at both ends of the device body, and a built-in elastic support component ensures the stability of the inner sheath; a fixed tube is installed on both sides of the device body, and its end is equipped with an end fixing piece, which is sleeved on the outer sheath of the cable. During the connection process between the fixed tube and the device body, the end fixing piece is pushed to tighten the outer sheath and drive it to move toward the device body; a limiting fixing component is provided on both sides of the middle part of the device body to limit the rotation of the fixed tube and abut against the fixed conductor. The present invention ensures the stability of conductor plugging through the arc-shaped groove and the elastic support structure, and combines the dual fixing sheath and anti-slip design of the fixed tube and the limiting fixing component to significantly improve the reliability and structural stability of the cable connection.

Description

Technical Field

[0001] The invention belongs to the technical field of cable connection, and in particular relates to a low-altitude economical cable connection device. Background Art

[0002] In modern low-altitude economic applications, the reliability and safety of cable connections are crucial. Traditional cable connection methods often rely on simple mechanical fastening or welding methods, which are not only complex and time-consuming, but also difficult to ensure stable electrical connection performance. With the development of the low-altitude economic sector, the demand for efficient, stable, and easy-to-maintain cable connection solutions is growing.

[0003] To address these issues, a number of improved cable connectors have emerged on the market, incorporating elastic support components and multi-point fixing designs to enhance connection stability. However, these existing technologies still suffer from limitations, such as loosening and complex installation. Especially in low-altitude applications, where cables must withstand high mechanical stress and frequent environmental changes, a connector with greater stability and reliability is needed to overcome the shortcomings of current practical applications. Summary of the Invention

[0004] The purpose of the present invention is to provide a low-altitude economical cable connection device, aiming to solve the problems mentioned in the above background technology.

[0005] The present invention is achieved by providing a low-altitude economical cable connection device, comprising a device body and further comprising:

[0006] Arc-shaped slots: A plurality of arc-shaped slots for inserting conductors of cables are circumferentially distributed on both sides of the middle part of the device body. A plurality of conductive seats are also circumferentially distributed in the middle part of the device body. The two ends of the conductive seats are correspondingly connected to the arc-shaped slots. When the conductor is inserted into the arc-shaped slot, the corresponding conductors on both sides of the device body are electrically connected through the conductive seats.

[0007] Positioning grooves: a plurality of positioning grooves for limiting the inner sheath of the cable are circumferentially distributed at both ends of the device body, and support components for elastically supporting the inner sheath are installed in the positioning grooves;

[0008] A connecting tube, wherein the two sides of the device body are detachably mounted with connecting tubes for fixing the inner sheath in the positioning groove, and an end fixing piece is further mounted on the end of the connecting tube away from the device body, and the end fixing piece is sleeved on the outer sheath of the cable, and during the process of connecting the connecting tube and the device body, the connecting tube is also used to push the end fixing piece to abut and fix the outer sheath, and drive the outer sheath to move toward the device body;

[0009] A limiting fixing assembly is also installed on both sides of the middle part of the device body. When the conductor is inserted into the arc groove and the connecting tube is installed, the limiting fixing assembly is used to simultaneously limit the rotation of the connecting tube and abut and fix the conductor.

[0010] According to a further technical solution, the arc-shaped groove adopts an arc-shaped structure with its inner end facing the middle of the device body; the two ends of the conductive seat are connected to the inner end of the arc-shaped groove and one side of the arc-shaped groove close to the middle of the device body.

[0011] A further technical solution is that the diameters of both ends of the device body are smaller than the middle diameter, and the corners of both ends of the device body are rounded; the cross-section of the positioning groove is semicircular, and the support assembly includes a second spring and a support block. A plurality of support cavities corresponding to and connected to the positioning grooves are circumferentially distributed on the inner sides of both ends of the device body, and a support block for supporting the inner sheath is slidingly provided in the support cavity, and the end of the support block close to the positioning groove is a central arc-shaped concave structure, and a plurality of second springs for elastically supporting the support block are also installed in the support cavity.

[0012] A further technical solution is that the limit fixing assembly includes a push ring, an auxiliary ring, a spring and an insulating fixing rod, an auxiliary ring is installed and fixed in the middle of the device body, and movable openings are provided on both sides of the middle part of the device body corresponding to the arc-shaped groove, the inner end of the movable opening is connected to the side of the inner end of the arc-shaped groove away from the middle part of the device body, an insulating fixing rod is provided in the movable opening, and a spring is also provided in the movable opening for elastically supporting the insulating fixing rod, push rings fixedly connected to the insulating fixing rod are slidably provided on both sides of the middle part of the device body; extension grooves are also provided on both sides of the middle part of the device body, the extension grooves are connected to the movable openings, an extension ring that can be slidably and rotatably connected to the extension groove is fixed on one end of the connecting tube close to the device body, and a plurality of arc-shaped limit openings are circumferentially distributed on the end of the extension ring away from the connecting tube; when the connecting tube is fully abutted with the device body, the extension ring extends into the movable opening, and when there is no external force, under the elastic force of the spring, the insulating fixing rod abuts in the limit opening of the extension ring, and at the same time, the end of the insulating fixing rod abuts against the conductor in the arc groove.

[0013] A further technical solution is that the end fixing member includes an end ring 1, a fastening piece, an intermediate tube and an end ring 2, the end of the intermediate tube close to the device body is fixed with the end ring 2, the other end of the intermediate tube is fixed with the end ring 1, and the intermediate tube is circumferentially distributed with a plurality of openings, a fastening piece is provided in the opening, one end of the fastening piece is fixedly connected to the end ring 1, the other end of the fastening piece protrudes from the surface of the intermediate tube and is elastically arranged, and an arc-shaped protrusion is also provided on the inner side of the fastening piece, the end of the connecting tube away from the device body is sleeved on the intermediate tube, and the end diameter of the connecting tube is smaller than the diameter of the end ring 1 and the end ring 2; in the process of connecting the connecting tube and the device body, the connecting tube is also used to push the fastening piece of the end fixing member to retract inward, and make the arc-shaped protrusion abut and fix with the outer sheath, and utilize the limiting position of the fastening piece to make the connecting tube drive the outer sheath to move in the direction close to the device body.

[0014] According to a further technical solution, a stepped fixing opening is provided at one end of the intermediate tube away from the main body of the device, and a fixing bolt for fixing the outer sheath of the cable is provided in the stepped fixing opening, and the screw of the fixing bolt is threadedly connected to the inner hole of the stepped fixing opening, and the nut of the fixing bolt is accommodated in the outer hole of the stepped fixing opening.

[0015] According to a further technical solution, connecting threads for threaded connection of a connecting tube are provided on the outer sides of both ends of the device body; anti-slip grooves are also provided on the surface of the connecting tube; and the end of the connecting tube away from the device body is also rounded.

[0016] The present invention provides a low-altitude economical cable connection device, which has the following beneficial effects:

[0017] The arc-shaped slots are provided to facilitate the conductor to deform to a certain extent after being plugged in, thereby ensuring stability and reliability of the electrical connection.

[0018] The inner sheath can be limited by the positioning groove, and the inner sheath can be elastically supported by the supporting component. In this way, after the connecting tube is locked, the inner sheath can be kept in a stable state to prevent the conductor from falling off.

[0019] By arranging the connecting tube in combination with the end fixing piece, during the process of connecting the connecting tube to the device body, the connecting tube is also used to push the end fixing piece to abut and fix the outer sheath, and drive the outer sheath to move in the direction close to the device body, so that the outer sheath can be further tightened and fixed, thereby improving the stability and reliability of the connection.

[0020] In addition, through the arrangement of the limiting and fixing assembly, when the conductor is inserted into the arc groove and the connecting tube is installed, the limiting and fixing assembly is used to simultaneously limit the rotation of the connecting tube and abut and fix the conductor, which further ensures the stability of the conductor and the anti-slip performance of the connecting tube, making the cable connection more reliable.

[0021] In summary, the present invention ensures the stability of conductor insertion through the arc groove and elastic support structure, and combines the dual fixing sheath and anti-slip design of the connecting tube and the limiting fixing component to significantly improve the reliability and structural stability of the cable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a low-altitude economical cable connection device provided by an embodiment of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A;

[0024] Figure 3 An axonometric diagram of a low-altitude economical cable connection device provided by an embodiment of the present invention;

[0025] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part B;

[0026] Figure 5 A schematic structural diagram of a low-altitude economical cable connection device provided by an embodiment of the present invention with the left portion of the fixing tube removed;

[0027] Figure 6 A schematic structural diagram of the middle-end fixing part of the low-altitude economic cable connection device provided by an embodiment of the present invention;

[0028] Figure 7 for Figure 6 Schematic diagram of the main cross-sectional structure.

[0029] In the figure: 1-outer sheath, 2-end fixing piece, 3-fixed connection tube, 4-device body, 5-push ring, 6-auxiliary ring, 7-movable port, 8-spring 1, 9-anti-slip groove, 10-step fixing port, 11-fixing bolt, 12-inner sheath, 13-conductor, 14-support cavity, 15-spring 2, 16-support block, 17-insulating fixing rod, 18-limiting port, 19-extension ring, 20-arc groove, 21-end ring 1, 22-fastening plate, 23-intermediate tube, 24-end ring 2, 25-opening, 26-positioning groove, 27-connecting thread, 28-arc-shaped protrusion, 29-conductive seat, 30-extension groove. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0032] like Figure 1 、 Figure 3-Figure 5 As shown, a low-altitude economic cable connection device provided by one embodiment of the present invention includes a device body 4 and further includes:

[0033] Arc grooves 20, a plurality of arc grooves 20 for inserting the conductors 13 of the cable are circumferentially distributed on both sides of the middle part of the device body 4. A plurality of conductive seats 29 are also circumferentially distributed in the middle part of the device body 4. The two ends of the conductive seats 29 are correspondingly connected to the arc grooves 20. When the conductors 13 are inserted into the arc grooves 20, the corresponding conductors 13 on both sides of the device body 4 are electrically connected through the conductive seats 29;

[0034] Positioning grooves 26: A plurality of positioning grooves 26 for limiting the inner sheath 12 of the cable are circumferentially distributed at both ends of the device body 4. Support components for elastically supporting the inner sheath 12 are installed in the positioning grooves 26;

[0035] A connecting tube 3 is detachably mounted on both sides of the device body 4 for fixing the inner sheath 12 in the positioning groove 26. An end fixing piece 2 is also mounted on the end of the connecting tube 3 away from the device body 4. The end fixing piece 2 is sleeved on the outer sheath 1 of the cable. During the connection process between the connecting tube 3 and the device body 4, the connecting tube 3 is also used to push the end fixing piece 2 to abut and fix the outer sheath 1, and drive the outer sheath 1 to move toward the device body 4.

[0036] A limiting fixing assembly is also installed on both sides of the middle part of the device body 4. When the conductor 13 is inserted into the arc groove 20 and the connecting tube 3 is installed, the limiting fixing assembly is used to simultaneously limit the rotation of the connecting tube 3 and abut and fix the conductor 13.

[0037] In an embodiment of the present invention, an arc-shaped arc groove 20 is provided to facilitate the conductor 13 to ensure stability and reliability of electrical connection through a certain deformation after being plugged in; the inner sheath 12 can be limited by the positioning groove 26, and the inner sheath 12 can be elastically supported by the supporting assembly, so that after the connecting tube 3 is locked, the inner sheath 12 can be ensured to be in a stable state, and the conductor 13 can be prevented from falling off; by providing the connecting tube 3 with the end fixing piece 2, in the process of connecting the connecting tube 3 with the device body 4, the connecting tube 3 is also used to push the end fixing piece 2 to abut and fix with the outer sheath 1, and drive the outer sheath 1 to move in the direction close to the device body 4, so that the outer sheath 1 can be further tightened and fixed, thereby improving the stability and reliability of the connection. In addition, through the arrangement of the limiting and fixing assembly, when the conductor 13 is inserted into the arc groove 20 and the connecting tube 3 is installed, the limiting and fixing assembly is used to simultaneously limit the rotation of the connecting tube 3 and abut and fix the conductor 13, which further ensures the stability of the conductor 13 and the anti-slip performance of the connecting tube 3, making the cable connection more reliable.

[0038] like Figure 3-Figure 5 As shown in FIG. 1 , as a preferred embodiment of the present invention, the arcuate groove 20 is an arcuate structure with its inner end facing the middle of the device body 4 . The cross-section of the arcuate groove 20 is not limited, and is preferably circular, but can also be arranged into other shapes as needed. The conductive seat 29 is also not limited, and preferably: the two ends of the conductive seat 29 are connected to the inner end of the arcuate groove 20 and the side of the arcuate groove 20 near the middle of the device body 4 to ensure the reliability of the connection.

[0039] The diameters of both ends of the device body 4 are smaller than its central diameter, and the rounded corners of both ends of the device body 4 are beneficial to the reliable installation of the connecting tube 3; the cross-section of the positioning groove 26 is semicircular, and the support assembly includes a spring 2 15 and a support block 16. A plurality of support cavities 14 corresponding to and connected to the positioning groove 26 are circumferentially distributed on the inner side of both ends of the device body 4. A support block 16 for supporting the inner sheath 12 is slidingly provided in the support cavity 14. The end of the support block 16 close to the positioning groove 26 is a central arc-shaped concave structure, which is beneficial to the reliable positioning of the inner sheath 12. A plurality of springs 2 15 for elastically supporting the support block 16 are also installed in the support cavity 14 to ensure the elastic support effect of the support block 16 on the inner sheath 12.

[0040] like Figure 1 、 Figure 3-Figure 5As shown, as a preferred embodiment of the present invention, the limit fixing assembly includes a push ring 5, an auxiliary ring 6, a spring 8 and an insulating fixing rod 17, an auxiliary ring 6 is fixedly installed in the middle of the device body 4, and movable openings 7 are provided on both sides of the middle of the device body 4 corresponding to the arc groove 20, and the inner end of the movable opening 7 is connected to the side of the inner end of the arc groove 20 away from the middle of the device body 4, an insulating fixing rod 17 is provided in the movable opening 7, and a spring 8 for elastically supporting the insulating fixing rod 17 is also provided in the movable opening 7, and push rings 5 fixedly connected to the insulating fixing rod 17 are slidably provided on both sides of the middle of the device body 4; extension grooves 30 are also provided on both sides of the middle of the device body 4, extending The extension groove 30 is connected to the movable opening 7, and an extension ring 19 that can be slidably and rotatably connected to the extension groove 30 is fixed to the end of the connecting tube 3 close to the device body 4, and a plurality of arc-shaped limit openings 18 are circumferentially distributed on the end of the extension ring 19 away from the connecting tube 3; when the connecting tube 3 is completely abutted with the device body 4, the extension ring 19 extends into the movable opening 7, and when there is no external force, under the elastic force of the spring 8, the insulating fixing rod 17 abuts against the limit opening 18 of the extension ring 19, and at the same time, the end of the insulating fixing rod 17 abuts against the conductor 13 in the arc groove 20, thereby limiting the rotation of the connecting tube 3 and assisting in fixing the conductor 13, thereby improving the reliability of the installation connection.

[0041] It should be noted that as many limiting openings 18 as needed can be arranged. This makes it easier for the insulating fixing rod 17 to be locked in the limiting openings 18, improves the smoothness of the locking connection, and reduces the difficulty of operation. In addition, even if the insulating fixing rod 17 cannot be locked in the limiting openings 18, after the connecting tube 3 is slightly loosened and rotated, the insulating fixing rod 17 can be locked in the limiting openings 18 under the elastic force of the spring 1 8, thereby limiting the rotation of the connecting tube 3, which is highly reliable and meets the requirements of use.

[0042] like Figure 1-Figure 2 、 Figure 5-Figure 7 As shown, as a preferred embodiment of the present invention, the end fixing member 2 includes an end ring 1 21, a fastening piece 22, an intermediate tube 23 and an end ring 24. The intermediate tube 23 is fixed with an end ring 24 at one end close to the device body 4, and the other end of the intermediate tube 23 is fixed with an end ring 1 21. A plurality of openings 25 are distributed circumferentially on the intermediate tube 23, and a fastening piece 22 is provided in the opening 25. One end of the fastening piece 22 is fixedly connected to the end ring 1 21, and the other end of the fastening piece 22 protrudes from the surface of the intermediate tube 23 and is elastically arranged. An arc-shaped protrusion 28 is also provided on the inner side of the fastening piece 22. The end of the connecting tube 3 away from the device body 4 is sleeved on the intermediate tube 23, and the end diameter of the connecting tube 3 is smaller than the diameters of the end ring 1 21 and the end ring 24, which ensures that the connecting tube 3 and the end fixing member 2 cannot be separated, thereby improving reliability.

[0043] During the process of connecting the connecting tube 3 with the device body 4, the connecting tube 3 is also used to push the fastening piece 22 of the end fixing part 2 to retract inward, and make the arc-shaped protrusion 28 abut and fix with the outer sheath 1, and utilize the limiting effect of the fastening piece 22 to enable the connecting tube 3 to drive the outer sheath 1 to move toward the device body 4.

[0044] Preferably, in order to ensure that the end fixing piece 2 has a certain fixing effect when it is sleeved on the outer sheath 1 of the cable, a stepped fixing opening 10 is further provided at the end of the intermediate tube 23 away from the device body 4, and a fixing bolt 11 for fixing the outer sheath 1 of the cable is provided in the stepped fixing opening 10, and the screw of the fixing bolt 11 is threadedly connected to the inner hole of the stepped fixing opening 10, and the nut of the fixing bolt 11 is accommodated in the outer hole of the stepped fixing opening 10, so as to achieve the purpose of hidden installation of the fixing bolt 11 and avoid affecting the connecting tube 3.

[0045] Preferably, connecting threads 27 for threaded connection of the connecting tube 3 are provided on the outer sides of both ends of the device body 4; in order to facilitate the rotation of the connecting tube 3, anti-slip grooves 9 are also provided on the surface of the connecting tube 3; in order to improve the matching effect between the connecting tube 3 and the end fixing piece 2, and to reduce the friction between the connecting tube 3 and the fastening piece 22 of the end fixing piece 2, the end of the connecting tube 3 away from the device body 4 is also chamfered.

[0046] The above embodiment of the present invention provides a low-altitude economical cable connection device, and its working principle is summarized as follows:

[0047] The conductor 13 of the cable is inserted into the arc groove 20 opened on both sides of the device body 4. The arc groove 20 is designed to be an arc shape, which helps to ensure the stability of the conductor 13 after insertion and the reliability of the electrical connection, and realizes electrical connection through the conductive seat 29.

[0048] The cable's inner sheath 12 is positioned in positioning slot 26 and is resiliently supported by a support assembly (including spring 2 15 and support block 16) to ensure the stability of inner sheath 12 and prevent conductor 13 from falling out. The end of support block 16, near positioning slot 26, has a central, curved, inwardly concave structure, which facilitates the secure positioning of inner sheath 12.

[0049] The coupling tube 3 is mounted at both ends of the device body 4 and is equipped with end fixings 2. When the coupling tube 3 is connected to the device body 4, the end fixings 2 are pushed inward, causing the fastening tabs 22 to come into close contact with the cable outer jacket 1, thereby firmly securing the outer jacket 1. Furthermore, by rotating the coupling tube 3, the outer jacket 1 can be further tightened, enhancing the stability of the overall connection.

[0050] The limiting and fixing assembly includes a push ring 5, an auxiliary ring 6, a spring 18, and an insulating fixing rod 17. When the coupling tube 3 is fully in contact with the device body 4, the limiting opening 18 on the extension ring 19 engages with the insulating fixing rod 17. Under the action of the spring 18, the insulating fixing rod 17 snaps into the limiting opening 18, preventing the coupling tube 3 from rotating and further securing the conductor 13, thereby improving the safety and reliability of the connection.

[0051] In addition, the fixing bolt 11 in the end fixing member 2 can be tightened to further secure the position of the outer sheath 1 without affecting the operation of the connecting tube 3. The intermediate tube 23 is also provided with a stepped fixing opening 10 at the end away from the device body 4. The screw of the fixing bolt 11 is threadedly connected to the inner hole of the stepped fixing opening 10, and the nut of the fixing bolt 11 is accommodated in the outer hole of the stepped fixing opening 10, so that the fixing bolt 11 is installed in a hidden manner and does not affect the connecting tube 3.

[0052] To sum up, the present invention utilizes designs such as arc groove 20, positioning groove 26, support assembly, connecting tube 3, end fixing part 2 and limiting fixing assembly to ensure the stability and reliability of cable connection, which is particularly suitable for low-altitude economic application scenarios that require high safety standards.

[0053] The circuits, electronic components and modules involved are all existing technologies and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to software and methods.

[0054] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A low-altitude economic cable connection device, comprising a device body (4), characterized in that: Also includes: The arc-shaped groove (20) is provided on both sides of the middle of the device body (4) and is used for plugging in the conductor (13) of the cable. The middle of the device body (4) is also provided with a plurality of conductive seats (29) distributed circumferentially. The two ends of the conductive seats (29) are connected to the arc-shaped groove (20) respectively. When the conductor (13) is plugged into the arc-shaped groove (20), the corresponding conductors (13) on both sides of the device body (4) are electrically connected through the conductive seats (29). Positioning grooves (26), a plurality of positioning grooves (26) for limiting the inner sheath (12) of the cable are circumferentially distributed at both ends of the device body (4), and a support component for elastically supporting the inner sheath (12) is installed in the positioning grooves (26); A connecting tube (3), wherein both sides of the device body (4) are detachably provided with connecting tubes (3) for fixing the inner sheath (12) in the positioning groove (26), and an end fixing member (2) is further provided at one end of the connecting tube (3) away from the device body (4), the end fixing member (2) being sleeved on the outer sheath (1) of the cable, and in the process of connecting the connecting tube (3) and the device body (4), the connecting tube (3) is further used to push the end fixing member (2) to abut against and fix the outer sheath (1), and to drive the outer sheath (1) to move in a direction close to the device body (4); A position-limiting fixing assembly is further installed on both sides of the middle portion of the device body (4); when the conductor (13) is inserted into the arc-shaped groove (20) and the connecting tube (3) is installed, the position-limiting fixing assembly is used to simultaneously limit the rotation of the connecting tube (3) and abut and fix the conductor (13); The position limiting and fixing assembly comprises a push ring (5), an auxiliary ring (6), a spring 1 (8) and an insulating fixing rod (17); An auxiliary ring (6) is fixedly mounted in the middle of the device body (4), and movable openings (7) are provided on both sides of the middle of the device body (4) corresponding to the arc-shaped groove (20), and the inner end of the movable opening (7) is connected to the inner end of the arc-shaped groove (20) on the side away from the middle of the device body (4); An insulating fixing rod (17) is provided in the movable opening (7), and a spring (8) for elastically supporting the insulating fixing rod (17) is also provided in the movable opening (7); Push rings (5) fixedly connected to insulating fixed rods (17) are slidably provided on both sides of the middle of the device body (4); Extension grooves (30) are further provided on both sides of the middle portion of the device body (4), the extension grooves (30) being in communication with the movable opening (7), an extension ring (19) capable of sliding and rotating in connection with the extension groove (30) being fixed to one end of the connecting cylinder (3) close to the device body (4), and a plurality of arc-shaped limiting openings (18) are circumferentially distributed on one end of the extension ring (19) away from the connecting cylinder (3); When the connecting tube (3) is completely in contact with the device body (4), the extension ring (19) extends into the movable opening (7), and when there is no external force, under the elastic force of the spring 1 (8), the insulating fixing rod (17) is in contact with the limiting opening (18) of the extension ring (19), and at the same time, the end of the insulating fixing rod (17) is in contact with the conductor (13) in the arc groove (20).

2. The low-altitude economic cable connection device according to claim 1, characterized in that: The arc-shaped groove (20) adopts an arc-shaped structure with the inner end facing the middle of the device body (4); The two ends of the conductive seat (29) are connected to the inner end of the arc-shaped slot (20) and one side of the arc-shaped slot (20) close to the middle of the device body (4).

3. The low altitude economic cable connection device according to claim 1, characterized in that: The diameters of both ends of the device body (4) are smaller than the diameter of the middle thereof, and both ends of the device body (4) are rounded; The cross section of the positioning groove (26) is semicircular; The support assembly includes a second spring (15) and a support block (16). A plurality of support cavities (14) corresponding to and connected to the positioning grooves (26) are circumferentially distributed on the inner sides of both ends of the device body (4). A support block (16) for supporting the inner sheath (12) is slidably provided in the support cavity (14). The end of the support block (16) close to the positioning groove (26) is a central arc-shaped concave structure. A plurality of second springs (15) for elastically supporting the support block (16) are also installed in the support cavity (14).

4. The low altitude economic cable connection device according to claim 1 or 3, characterized in that: The end fixing member (2) comprises an end ring 1 (21), a fastening plate (22), an intermediate cylinder (23) and an end ring 2 (24); The middle tube (23) is fixed with an end ring 2 (24) at one end close to the device body (4), and an end ring 1 (21) is fixed to the other end of the middle tube (23). A plurality of openings (25) are distributed circumferentially on the middle tube (23), and a fastening piece (22) is provided in the opening (25). One end of the fastening piece (22) is fixedly connected to the end ring 1 (21), and the other end of the fastening piece (22) protrudes from the surface of the middle tube (23) and is elastically arranged. An arc-shaped protrusion (28) is also provided on the inner side of the fastening piece (22); One end of the connecting tube (3) away from the device body (4) is sleeved on the intermediate tube (23), and the diameter of the end of the connecting tube (3) is smaller than the diameters of the end ring 1 (21) and the end ring 2 (24); During the process of connecting the connecting tube (3) with the device body (4), the connecting tube (3) is also used to push the fastening piece (22) of the end fixing member (2) to retract inward, and to make the arc-shaped protrusion (28) abut and fix with the outer sheath (1), and utilize the limiting function of the fastening piece (22) to make the connecting tube (3) drive the outer sheath (1) to move in a direction close to the device body (4).

5. The low altitude economic cable connection device according to claim 4, characterized in that: The intermediate cylinder (23) is further provided with a stepped fixing opening (10) at one end away from the device body (4), and a fixing bolt (11) for fixing the outer sheath (1) of the cable is provided in the stepped fixing opening (10); The screw rod of the fixing bolt (11) is threadedly connected to the inner hole of the stepped fixing opening (10), and the nut of the fixing bolt (11) is accommodated in the outer hole of the stepped fixing opening (10).

6. The low altitude economic cable connection device according to claim 5, characterized in that: Connecting threads (27) for threaded connection to the connecting cylinder (3) are provided on the outer sides of both ends of the device body (4); The surface of the connecting tube (3) is also provided with anti-slip grooves (9); The end of the connecting tube (3) away from the device body (4) is also rounded.

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