A power cable and its cable connection device

Abstract

The present invention discloses a power cable and a cable connection device thereof, which relates to the technical field of cables and includes a main body component. The main body component includes a connecting frame. An upper inlet is provided at the top inside the connecting frame, and a lower inlet is provided at the bottom inside the connecting frame. It further includes: an upper connecting component, which is arranged above the main body component, and a lower connecting component, which is arranged below the main body component. Through the mutual cooperation of the second elastic member, the first airbag and the second airbag, when the cable is affected by the outside world and shakes, resulting in loosening at the cable connection, the second airbag does not fit the cable, so that the elastic potential energy of the second elastic member is released to squeeze the first airbag, causing the second airbag to expand and tightly fit the cable all the time, improving the tightness of the cable connection and ensuring the sealing performance of the cable, so as to enable the cable to transmit normally.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a power cable and a cable connecting device thereof. Background Art

[0002] Power cables are cables used to transmit and distribute electrical energy. They are commonly used in urban underground power grids, power station lead-out lines, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas.

[0003] When using power cables, it is often necessary to connect two power cables together. At this time, a cable connector is needed for connection. The cable connector is also called a cable head. After the cable is laid, in order to make it a continuous line, each section of the line must be connected as a whole. These connection points are called cable connectors. The cable connector in the middle of the cable line is called an intermediate connector, and the cable connectors at both ends of the line are called terminal heads. The cable connector is used to lock and fix the incoming and outgoing lines, and plays a role in waterproofing, dustproofing and vibration prevention.

[0004] The Chinese patent application number CN202410324567.8 discloses a power cable connection device. The cable connection operation is relatively complicated, and a variety of crimping and caliper tools are required. It takes a lot of time to process the connection nodes. In addition, it is difficult to control the accurate execution of its connection process standards, which makes it difficult to effectively control the connection quality of the connection nodes. The present invention consists of a locking sleeve mechanism, a lock mechanism and a conflicting seal. The power cable connection device is formed by four first sealing blocks on the first round tube being inserted between the four unfolded second sealing blocks to form a ring body, thereby increasing the sealing performance of the inner wall of the sleeve after the sleeve is connected. Finally, the first spring telescopic rod on one end of the L-shaped conflicting tooth plate on the tube is inserted between the conical arc plate and the baffle to fix the sleeve and the sleeve after docking. The installation is simple and convenient. However, the patent is affected by the outside world. The cable exposed to the external environment for a long time may be affected by external forces such as wind, earthquake, and traffic vibration. The sealing performance of the cable cannot be guaranteed, which may easily lead to loosening of the cable connection and affect the use of the cable.

[0005] When the existing cable connecting device is in use, the cable is easy to fall off or break from the connecting device, and the stability of the cable connection is poor. Cables exposed to the external environment for a long time may be affected by external forces such as wind, earthquakes, and traffic vibrations. The sealing of the cable cannot be guaranteed, which can easily cause the cable connection to loosen and affect the use of the cable.

[0006] Therefore, a power cable and a cable connecting device thereof are proposed to solve the above problems. Summary of the invention

[0007] The purpose of the present invention is to provide a power cable and its cable connection device, so as to solve the problems that the cable is prone to fall off or break from the connection device during use, and the stability of cable connection is poor, as mentioned in the above background technology.

[0008] To achieve the above purpose, the present invention provides the following technical solutions: A power cable includes two cables. A sheath is provided on the surface of each cable, and a conductor is provided inside the cable. The two conductors are connected to each other.

[0009] A cable connection device includes a main body assembly. The main body assembly includes a connection frame. An upper inlet is provided at the top end inside the connection frame, and a lower inlet is provided at the bottom end inside the connection frame. It also includes:

[0010] An upper connection assembly is provided above the main body assembly. The upper connection assembly includes an upper connection head, which is connected above the connection frame, and the upper connection head is used to connect the cable.

[0011] A lower connection assembly is provided below the main body assembly. The lower connection assembly includes a lower connection head, which is connected below the connection frame, and the lower connection head is used to connect the cable.

[0012] Preferably, a lower connection plate is fixedly connected to the top end of the lower connection head. A lower plug connector is fixedly connected to the top end of the lower connection plate. A thread groove is provided on the outer wall surface of the lower plug connector. Two adjustment grooves are opened near the bottom side of the lower plug connector. A first airbag is connected inside each adjustment groove. A second airbag is fixedly connected inside the lower plug connector. The second airbag is communicated with the first airbag through a connecting pipe.

[0013] Preferably, two insertion slots are provided on the surface of the upper inlet. An arc groove is provided at the bottom end of each insertion slot. Two grooves are provided on the inner wall of the lower inlet. A convex buckle is slidably connected inside each groove. A second elastic member is movably connected between the convex buckle and the groove. A slope is provided on the side of the bottom end of the convex buckle away from the second elastic member.

[0014] Preferably, the main body assembly further includes a water separation groove, which is provided on the surfaces of the top end and the bottom end of the connection frame. Two chutes are provided on the inner wall surface of the connection frame near the lower inlet. Two movable blocks are movably connected to the inner wall of the connection frame. A slider is fixedly connected to the outer wall of each movable block. The slider is slidably inserted into the chute. A limiting rod is fixedly connected to the top end of each movable block. A first elastic member is movably connected to the outer wall of the limiting rod. One end of the first elastic member is fixed to the top end of the movable block.

[0015] Preferably, the bottom end of the upper connector is fixedly connected with an upper connecting plate, the bottom end of the upper connecting plate is fixedly connected with an upper plug connector, two limiting blocks are fixedly connected to the outer wall of the upper plug connector, and limiting holes are arranged on the surface of each limiting block.

[0016] Preferably, the upper plug connector is slidably inserted into the upper inlet, the lower plug connector is slidably inserted into the lower inlet, the limiting rod is slidably inserted into the limiting hole, and the limiting block is inserted into the arc-shaped groove through the insertion groove.

[0017] Preferably, the top surface of the lower plug connector is attached to the bottom surface of the movable block, two wear-resistant plates are arranged inside the upper inlet, the surface of each wear-resistant plate is attached to the outer wall of the upper plug connector, the upper connector and the lower connector are both movably connected with the cable inside, and a plurality of arc-shaped buckles are fixedly connected to the inner wall surfaces of the upper connector and the lower connector, and each arc-shaped buckle is clamped into the sheath on the surface of the cable.

[0018] Preferably, the convex buckle is slidably inserted into the threaded groove, waterproof rings are fixedly connected to the bottom end of the upper connecting plate and the top end of the lower connecting plate, and the waterproof rings are slidably inserted into the waterproof grooves.

[0019] Preferably, two assembly holes are arranged on the outer walls of the upper connecting plate and the lower connecting plate, an assembly rod is movably connected to the inside of each assembly hole, and the upper connecting assembly and the lower connecting assembly are threadedly connected through the assembly rod.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. Through the cooperation of the limiting rod and the limiting hole, when the device is in use, the movable block can be pushed by the lower plug connector, so that the movable block drives the limiting rod to move upward, so that the limiting rod is inserted into the limiting hole, thereby limiting the limiting hole and preventing the upper connector from being directly pulled out of the upper inlet, thereby improving the stability of the device.

[0022] 2. Through the mutual cooperation of the second elastic member, the first airbag and the second airbag, when the cable is affected by the outside world and shakes, resulting in looseness at the cable connection, the second airbag is not attached to the cable, so that the elastic potential energy of the second elastic member is released to squeeze the first airbag, so that the second airbag expands and is always tightly attached to the cable, improving the tightness of the cable connection, ensuring the sealing performance of the cable, and thus enabling the cable to transmit normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is an exploded schematic diagram of the overall structure of the present invention;

[0025] Figure 3 Schematic cross-sectional structure diagram of the explosion of the main component of the present invention;

[0026] Figure 4 Top view of the cross-section of the arc groove of the present invention;

[0027] Figure 5 Schematic structure diagram of the thread groove of the present invention;

[0028] Figure 6 Schematic cross-sectional structure diagram of the connecting frame of the present invention;

[0029] Figure 7 Front view of the cross-section of the connecting frame of the present invention;

[0030] Figure 8 Side view of the cross-section of the connecting frame of the present invention;

[0031] Figure 9 For the present invention Figure 8 Partial structure diagram of part A in;

[0032] Figure 10 Schematic structure diagram of the convex buckle of the present invention.

[0033] In the figure: 1. Main component; 11. Connecting frame; 12. Upper inlet; 13. Lower inlet; 14. Water separation tank; 15. Sliding groove; 16. Movable block; 17. Slide block; 18. First elastic member; 19. Limit rod; 110. Groove; 111. Arc groove; 112. Insertion slot; 113. Convex buckle; 114. Second elastic member; 115. Inclined plane; 2. Upper connection assembly; 21. Upper connection head; 22. Upper connection plate; 23. Upper insertion joint; 24. Limit block; 25. Limit hole; 3. Lower connection assembly; 31. Lower connection head; 32. Lower connection plate; 33. Lower insertion joint; 34. Thread groove; 35. Adjustment groove; 36. First airbag; 37. Second airbag; 4. Cable; 5. Assembly rod; 6. Assembly hole; 7. Conductor; 8. Abrasion-proof plate; 9. Water-proof ring. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0035] Embodiment 1

[0036] As Figures 1 to 10As shown in the figure, a cable connection device includes a main body assembly 1. The main body assembly 1 includes a connecting frame 11. At the top end inside the connecting frame 11, there is an upper inlet 12, and at the bottom end inside the connecting frame 11, there is a lower inlet 13. It further includes: an upper connecting assembly 2. The upper connecting assembly 2 is arranged above the main body assembly 1. The upper connecting assembly 2 includes an upper connecting head 21. The upper connecting head 21 is connected to the upper part of the connecting frame 11. The upper connecting head 21 is used to connect the cable 4. On the inner wall of the lower inlet 13, there are two grooves 110. Inside each groove 110, there is a sliding connection with a convex buckle 113. Between the convex buckle 113 and the groove 110, there is a second elastic member 114. On the side of the bottom end of the convex buckle 113 away from the second elastic member 114, there is an inclined surface 115. On the surface of the upper inlet 12, there are two insertion slots 112. At the bottom end of each insertion slot 112, there is an arc-shaped slot 111.

[0037] As Figures 1 to 8 As shown in the figure, the main body assembly 1 further includes a water separation groove 14. The water separation groove 14 is arranged on the surfaces of the top end and the bottom end of the connecting frame 11. At a position on the inner wall surface of the connecting frame 11 close to the lower inlet 13, there are two chutes 15. The chutes 15 are arranged in a T shape. Inside the inner wall of the connecting frame 11, there are two movable blocks 16 connected movably. On the outer wall of each movable block 16, there is a fixed connection with a slider 17. The slider 17 is arranged in a T shape. The slider 17 slides and inserts into the inside of the chute 15. The slider 17 can slide in the chute 15. At the top end of each movable block 16, there is a fixed connection with a limiting rod 19. On the outer wall of the limiting rod 19, there is a movable connection with a first elastic member 18. One end of the first elastic member 18 is fixed at the top end of the movable block 16.

[0038] Through the cooperation of the limiting rod 19 and the limiting hole 25, when the device is in use, the movable block 16 can be pushed by the lower insertion joint 33, so that the movable block 16 drives the limiting rod 19 to move upward, so that the limiting rod 19 is inserted into the inside of the limiting hole 25, thereby limiting the limiting hole 25, making it impossible for the upper connecting head 21 to be directly pulled out from the upper inlet 12, and further improving the stability of the device.

[0039] As Figures 1 to 4As shown, the upper connection component 2 is arranged above the main body component 1. The upper connection component 2 includes an upper connection head 21 which is connected to the upper part of the connection frame 11. The upper connection head 21 is arranged above the connection frame 11. The bottom end of the upper connection head 21 is fixedly connected with an upper connection plate 22. The bottom end of the upper connection plate 22 is fixedly connected with an upper plug connector 23. The outer wall of the upper plug connector 23 is fixedly connected with two limiting blocks 24. Each limiting block 24 is respectively slidably connected with the inner wall of the insertion slot 112. Each limiting block 24 is provided with a limiting hole 25 on its surface. The upper plug connector 23 is slidably inserted into the upper inlet 12. The lower plug connector 33 is slidably inserted into the lower inlet 13. The limiting rod 19 is slidably inserted into the limiting hole 25. The limiting blocks 24 are inserted into the arc-shaped groove 111 through the insertion slot 112. The top surface of the lower plug connector 33 is in contact with the bottom surface of the movable block 16. Two wear-resistant plates 8 are arranged inside the upper inlet 12. The wear-resistant plates 8 are arc-shaped. The surface of each wear-resistant plate 8 is in contact with the outer wall of the upper plug connector 23. The convex buckles 113 are slidably inserted into the threaded grooves 34. The bottom end of the upper connection plate 22 and the top end of the lower connection plate 32 are both fixedly connected with water-proof rings 9. The water-proof rings 9 are respectively movably inserted into the water-proof grooves 14. The outer walls of the upper connection plate 22 and the lower connection plate 32 are both provided with two assembly holes 6. Assembly rods 5 are movably connected inside the assembly holes 6. The upper connection component 2 and the lower connection component 3 are threadedly connected through the assembly rods 5.

[0040] As Figures 2 to 5 shown, the lower connection component 3 is arranged below the main body component 1. The lower connection component 3 includes a lower connection head 31 which is connected to the lower part of the connection frame 11. The lower connection head 31 is arranged below the connection frame 11. The lower connection head 31 is used for connecting the cable 4. The top end of the lower connection head 31 is fixedly connected with a lower connection plate 32. The top end of the lower connection plate 32 is fixedly connected with a lower plug connector 33. The outer wall surface of the lower plug connector 33 is provided with a threaded groove 34.

[0041] Through the cooperation of the upper connector 21 and the lower connector 31, when the device is in use, the cable 4 can be connected inside the upper connector 21 and the lower connector 31. Subsequently, the upper plug connector 23 and the lower plug connector 33 are respectively inserted into the upper inlet 12 and the lower inlet 13. When the limiting block 24 descends to the position of the arc-shaped groove 111, rotate the upper connector 21 to make the upper plug connector 23 rotate inside the upper inlet 12, and make the limiting block 24 rotate by ninety degrees. Then insert the lower plug connector 33 into the lower inlet 13. The lower plug connector 33 contacts the inclined surface 115 of the convex buckle 113. The lower plug connector 33 presses the inclined surface 115, causing the convex buckle 113 to press the second elastic member 114 and retract into the groove 110, so that the lower connector 31 is inserted into the lower inlet 13. At this time, the convex buckle 113 will pop out due to the elastic potential energy of the second elastic member 114 and snap into the internal thread groove 34. As the lower connector 31 rotates and rises, the inclined surface 115 on the surface of the convex buckle 113 will hit the surface of the thread groove 34 and retract into the groove 110 until the lower connector 31 is inserted into the innermost position of the lower inlet 13. The convex buckle 113 will pop out and snap into the position of the thread groove 34 close to the lower plug connector 33, thereby fixing the lower connector 31. At this time, the lower connector 31 cannot be directly pulled out. At the same time, when the lower plug connector 33 rotates upward, it will push the movable block 16, causing the movable block 16 to drive the limiting rod 19 to move upward, so that the limiting rod 19 is inserted into the limiting hole 25, thereby limiting the limiting hole 25 and preventing the upper connector 21 from being directly pulled out of the upper inlet 12, thereby improving the stability of the device. Insert the assembly rod 5 into the assembly hole 6 to fix the upper connection assembly 2 and the lower connection assembly 3, avoiding the loosening or accidental rotation of the upper connection assembly 2 and the lower connection assembly 3. When inserting the upper plug connector 23 and the lower plug connector 33, the water isolation ring 9 will be inserted into the water isolation groove 14, so that the device has a good waterproof function.

[0042] Through the cooperation of the limiting rod 19 and the limiting hole 25, when the device is in use, through the pushing of the movable block 16 by the lower plug connector 33, the movable block 16 drives the limiting rod 19 to move upward, so that the limiting rod 19 is inserted into the limiting hole 25, thereby limiting the limiting hole 25 and preventing the upper connector 21 from being directly pulled out of the upper inlet 12, thereby improving the stability of the device.

[0043] Embodiment 2

[0044] The cable 4 is affected by the outside world. The cable 4 that is exposed to the outside environment for a long time may be affected by external forces such as wind, earthquake, and traffic vibration, and the sealing performance of the cable 4 cannot be guaranteed, which easily leads to loosening of the connection of the cable 4 and affects the use of the cable 4.

[0045] On the basis of the above embodiment, as Figures 2 to 10As shown, the outer wall surface of the lower insertion joint 33 is provided with a threaded groove 34. Two adjustment grooves 35 are opened near the bottom side of the threaded groove 34. When the lower insertion joint 33 is completely inserted into the lower inlet 13, two buckles 113 respectively correspond to the two adjustment grooves 35. A first airbag 36 is connected inside each adjustment groove 35. A second airbag 37 is fixedly connected inside the lower insertion joint 33. The second airbag 37 has insulation. The second airbag 37 is attached to the surface sheath of the cable 4. The second airbag 37 is communicated with the first airbag 36 through a connecting pipe.

[0046] As Figure 9 , Figure 10 As shown, two grooves 110 are provided on the inner wall of the lower inlet 13. A buckle 113 is slidably connected inside each groove 110. A second elastic member 114 is movably connected between the buckle 113 and the groove 110. The elasticity of the second elastic member 114 can support the buckle 113. An inclined surface 115 is opened on one side of the bottom end of the buckle 113 away from the second elastic member 114.

[0047] The cable 4 is inserted into the inside of the lower connection head 31. The second airbag 37 is attached to the surface sheath of the cable 4. The second airbag 37 preliminarily positions the cable 4. When the lower insertion joint 33 is completely inserted into the lower inlet 13, the two buckles 113 respectively correspond to the two adjustment grooves 35. The buckle 113 is ejected by the elasticity of the second elastic member 114 and snaps into the inside of the adjustment groove 35. At the same time, the first airbag 36 is squeezed. The gas inside the first airbag 36 is pressured to flow towards the second airbag 37, so that the gas inside the second airbag 37 increases and expands, further fixing the cable 4 and preventing the cable 4 from detaching from the lower insertion joint 33. On the one hand, through the limitation of the adjustment groove 35 and the buckle 113, the lower insertion joint 33 is prevented from detaching from the lower inlet 13, improving the connection stability of the cable 4. On the other hand, by the buckle 113 squeezing the first airbag 36, the gas inside the first airbag 36 flows into the inside of the second airbag 37, so that the gas inside the second airbag 37 increases and expands, further fixing the cable 4 and preventing the cable 4 from detaching from the lower insertion joint 33. When the cable 4 is affected by the outside world and shakes, causing the connection part of the cable 4 to become loose, the second airbag 37 is not attached to the cable 4, and a gap appears between the second airbag 37 and the sheath of the cable 4, so that the elasticity of the second elastic member 114 can squeeze the first airbag 36. The gas inside the first airbag 36 flows into the inside of the second airbag 37, so that the gas inside the second airbag 37 increases and expands and always fits tightly with the cable 4. By the elasticity of the second elastic member 114 always squeezing the first airbag 36, the connection tightness of the cable 4 is improved, and the sealing performance of the cable 4 is ensured, so that the cable 4 can be normally transmitted.

[0048] As Figures 1 to 10As shown in the figure, for a power cable, the inside of the upper connector 21 and the lower connector 31 are both movably connected to the cable 4. Sheaths are provided on the surfaces of the cable 4, and conductors 7 are provided inside the cable 4. The two conductors 7 are both movably inserted into the inside of the connection frame 11 and are connected to each other. A plurality of arc-shaped clasps are fixedly connected to the inner wall surfaces of the upper connector 21 and the lower connector 31, and the arc-shaped clasps are all snapped into the sheaths on the surface of the cable 4.

[0049] When the power cable is in use, first insert the cable 4 into the inside of the upper connector 21 and the lower connector 31. Since a plurality of arc-shaped clasps are fixedly connected to the inner wall surfaces of the upper connector 21 and the lower connector 31, and the arc-shaped clasps are all snapped into the sheaths on the surface of the cable 4, the two conductors 7 are connected to each other, quickly connecting the cable 4 and improving the connection safety of the cable 4.

[0050] Through the mutual cooperation of the second elastic member 114, the first airbag 36 and the second airbag 37, when the cable 4 is affected by the outside world and shakes, causing the connection of the cable 4 to become loose, the second airbag 37 does not fit closely to the cable 4, so that the elastic potential energy of the second elastic member 114 is released to squeeze the first airbag 36, causing the second airbag 37 to expand and always fit closely to the cable 4, improving the tightness of the connection of the cable 4, ensuring the sealing performance of the cable 4, and thus enabling the cable 4 to transmit normally.

[0051] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A cable connection device, characterized in that: It includes two cables (4), each cable (4) is provided with a sheath on its surface, a conductor (7) is provided inside the cable (4), and the two conductors (7) are connected to each other; It further includes a main body assembly (1), the main body assembly (1) includes a connecting frame (11), an upper inlet (12) is provided at the top inside the connecting frame (11), and a lower inlet (13) is provided at the bottom inside the connecting frame (11); An upper connecting assembly (2), the upper connecting assembly (2) is arranged above the main body assembly (1), the upper connecting assembly (2) includes an upper connecting head (21), the upper connecting head (21) is connected to the upper part of the connecting frame (11), and the upper connecting head (21) is used to connect the cable (4); A lower connecting assembly (3), the lower connecting assembly (3) is arranged below the main body assembly (1), the lower connecting assembly (3) includes a lower connecting head (31), the lower connecting head (31) is connected to the lower part of the connecting frame (11), and the lower connecting head (31) is used to connect the cable (4); The top of the lower connecting head (31) is fixedly connected with a lower connecting plate (32), the top of the lower connecting plate (32) is fixedly connected with a lower socket (33), a thread groove (34) is provided on the outer wall surface of the lower socket (33), two adjusting grooves (35) are opened near the bottom side of the lower socket (33) of the thread groove (34), a first air bag (36) is connected inside each adjusting groove (35), a second air bag (37) is fixedly connected inside the lower socket (33), and the second air bag (37) is communicated with the first air bag (36) through a connecting pipe; Two plugging grooves (112) are provided on the surface of the upper inlet (12), an arc groove (111) is provided at the bottom of each plugging groove (112), two grooves (110) are provided on the inner wall of the lower inlet (13), a convex buckle (113) is slidably connected inside each groove (110), a second elastic member (114) is movably connected between the convex buckle (113) and the groove (110), and a slope (115) is opened on one side of the bottom end of the convex buckle (113) away from the second elastic member (114); The main body assembly (1) further includes a water separation groove (14), the water separation groove (14) is arranged on the surfaces of the top and bottom of the connecting frame (11), two chutes (15) are provided on the inner wall surface of the connecting frame (11) near the lower inlet (13), two movable blocks (16) are movably connected to the inner wall of the connecting frame (11), a slider (17) is fixedly connected to the outer wall of each movable block (16), the slider (17) is slidably inserted into the inside of the chute (15), a limiting rod (19) is fixedly connected to the top of each movable block (16), and a first elastic member (18) is movably connected to the outer wall of the limiting rod (19), and one end of the first elastic member (18) is fixed to the top of the movable block (16).

2. The cable connection device according to claim 1, characterized in that: The bottom end of the upper connector head (21) is fixedly connected with an upper connecting plate (22), the bottom end of the upper connecting plate (22) is fixedly connected with an upper plug connector (23), two limiting blocks (24) are fixedly connected to the outer wall of the upper plug connector (23), and limiting holes (25) are provided on the surface of each limiting block (24).

3. The cable connection device according to claim 2, characterized in that: The upper plug connector (23) is slidably inserted into the upper inlet (12), the lower plug connector (33) is slidably inserted into the lower inlet (13), the limiting rod (19) is slidably inserted into the limiting hole (25), and the limiting block (24) is inserted into the arc-shaped groove (111) through the plugging groove (112).

4. The cable connection device according to claim 3, characterized in that: The top surface of the lower plug connector (33) is in contact with the bottom surface of the movable block (16), two wear-resistant plates (8) are provided inside the upper inlet (12), and the surface of each wear-resistant plate (8) is in contact with the outer wall of the upper plug connector (23). The upper connector head (21) and the lower connector head (31) are both movably connected to the cable (4) inside, and a plurality of arc-shaped buckles are fixedly connected to the inner wall surfaces of the upper connector head (21) and the lower connector head (31), and each arc-shaped buckle is snapped into the sheath on the surface of the cable (4).

5. The cable connection device according to claim 4, wherein: The convex buckle (113) is slidably inserted into the threaded groove (34), water-proof rings (9) are fixedly connected to the bottom end of the upper connecting plate (22) and the top end of the lower connecting plate (32), and the water-proof rings (9) are movably inserted into the water-proof grooves (14).

6. The cable connection device according to claim 5, characterized in that: Two assembly holes (6) are provided on the outer walls of the upper connecting plate (22) and the lower connecting plate (32), an assembly rod (5) is movably connected to the inside of each assembly hole (6), and the upper connecting assembly (2) and the lower connecting assembly (3) are threadedly connected through the assembly rod (5).

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