Cable joint protection box and use method thereof

Abstract

The invention relates to the technical field of cable connection, in particular to a cable joint protection box and a use method thereof. The cable joint protection box comprises a protection box I, a protection box II, an adapter I, an adapter II and a protection part, the first protection box and the second protection box are each provided with a starting side and an ending side, the first connector is movably connected with the first protection box in a guiding mode in the first protection box, the second connector is movably connected with the second protection box in a guiding mode in the second protection box, and the first connector and the second connector are both used for being electrically connected with a cable. Only the first box cover and the second box cover need to be screwed to designated positions, and the installation efficiency is high; it is ensured that the center line of the cable in the first cable trench and the center line of the cable on the first connector are collinear, the center line of the cable in the second cable trench and the center line of the cable on the second connector are collinear, and connection failure of the cables, the first connector and the second connector is prevented. The first telescopic rod and the second telescopic rod apply acting force to ensure effective contact of the cable, the first connector and the second connector.

Description

Technical Field

[0001] The present invention relates to the technical field of cable connection, and particularly relates to a cable joint protection box and a using method thereof. Background Art

[0002] In recent years, with the acceleration of the urbanization construction process in China, the power industry has also been developing rapidly. Since overhead cables and the like will affect the urban beauty and there are many restrictions on the erection of electric poles, iron towers, etc., cable installation is generally carried out by underwater laying or directly burying in the ground, which also leads to more and more cable joints. When connecting cables, a cable joint protection box is usually required to protect the cable joints.

[0003] After retrieval, the cable joint protection boxes in the prior art usually need to be installed using a plurality of bolts and nuts, resulting in a low overall installation efficiency. Moreover, due to the design of its internal structure, the center lines of the two cables are not collinear, and it is easy for the overall connection of the cables to fail due to the torsional force caused by the torsion of the cables. Summary of the Invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a cable joint protection box and a using method thereof to solve the technical problems of low overall installation efficiency in the prior art and easy failure of the overall connection of the cables due to the torsional force caused by the torsion of the cables.

[0005] The present invention adopts the following technical solutions.

[0006] A cable joint protection box,

[0007] comprising a first protection box, a second protection box, a first connection head, a second connection head and a protection part; both the first protection box and the second protection box have a start side and an end side. The first connection head is guidingly and movably connected to the first protection box inside the first protection box, and the second connection head is guidingly and movably connected to the second protection box inside the second protection box. Both the first connection head and the second connection head are used for electrically connecting to the cables. The protection part includes a connection part, a first restraint part and a second restraint part. The connection part is used to connect the first protection box and the second protection box together. The first restraint part includes a first restraint member and a first telescopic rod. The first restraint member is guidingly and movably connected to the first protection box inside the first protection box. The first restraint member is located between the first connection head and the start side of the first protection box. A cable groove one is dug on the surface of the first restraint member. The first telescopic rod is located between the end side of the first protection box and the first restraint member and is used to urge the first restraint member to move. The second restraint part includes a second restraint member and a second telescopic rod. The second restraint member is guidingly and movably connected to the second protection box inside the second protection box. The second restraint member is located between the second connection head and the end side of the second protection box. A cable groove two is dug on the surface of the second restraint member. Both the cable groove one and the cable groove two are used to restrain the cables. The second telescopic rod is located between the end side of the second protection box and the second restraint member and is used to urge the second restraint member to move.

[0008] As an improvement, when the first protection box and the second protection box are connected, the side of the first connecting head close to the second connecting head is inside the second connecting head and in contact with the second connecting head. A base is arranged on the surface of the first connecting head close to the first restraint member, and the second connecting head is in contact with the base.

[0009] As an improvement, a first restraint sleeve is arranged on the inner surface of the first protection box. A first guiding groove is dug on the inner surface of the first restraint sleeve. The first guiding groove is located at a position on the inner surface of the first restraint sleeve away from the starting side of the first protection box. The outer dimension of the base corresponds to the inner dimension of the first restraint sleeve. The base is in guiding and movable connection with the first restraint sleeve. A first protrusion is arranged on the surface of the base, and the first protrusion is in guiding and movable connection with the first guiding groove. A second restraint sleeve is arranged on the inner surface of the second protection box. A second guiding groove is dug on the inner surface of the second restraint sleeve. The second guiding groove is located at a position on the inner surface of the second restraint sleeve away from the starting side of the second protection box. A second protrusion is arranged on the surface of the second connecting head, and the second protrusion is in guiding and movable connection with the second guiding groove.

[0010] As an improvement, on the inner side of the first protection box, a first fixing groove, a first connecting groove and a first restraint groove are arranged in sequence from its end side to the side close to the first restraint sleeve. The first fixing groove communicates with the first restraint groove through the first connecting groove. The first restraint member is in guiding and movable connection with the first restraint groove. The center lines of the first fixing groove, the first connecting groove and the first cable groove are collinear. On the inner side of the second protection box, a second fixing groove, a second connecting groove and a second restraint groove are arranged in sequence from its end side to the side close to the second restraint sleeve. The second fixing groove is connected to the second restraint groove through the second connecting groove. The axes of the second fixing groove and the second connecting groove coincide with the axis of the second wire groove on the second restraint member.

[0011] As an improvement, the first restraint part further includes a first plugging member, a first washer and a first box cover. The first plugging member is in guiding and movable connection with the first fixing groove. The first washer is in guiding and movable connection with the first connecting groove. The first telescopic rod is fixedly connected to the first washer. The side of the first telescopic rod away from the first washer is in contact with the first restraint member. An internal thread is arranged on one side of the first box cover, and an external thread matching the internal thread is arranged on one side of the first protection box. The first box cover and the first protection box are connected by means of the internal thread and the external thread. The center line of the first box cover is collinear with the center line of the first fixing groove. The second restraint part further includes a second plugging member, a second washer and a second box cover. The second plugging member is in guiding and movable connection with the second fixing groove. The second washer is in guiding and movable connection with the second connecting groove. The second telescopic rod is fixedly connected to the second washer. One side of the second telescopic rod is in contact with the second restraint member. An internal thread is arranged on one side of the second box cover, and an external thread matching the internal thread is arranged on one side of the second protection box. The second box cover and the second protection box are connected by means of the internal thread and the external thread. The center line of the second box cover is collinear with the center line of the second fixing groove.

[0012] As an improvement, a guiding groove one is dug on the constraint groove one, a constraint bar one is arranged on the constraint member one, the constraint bar one is in guiding and movable connection with the guiding groove one, a guiding groove two is dug on the constraint groove two, a constraint bar two is arranged on the constraint member two, and the constraint bar two is in guiding and movable connection with the guiding groove two.

[0013] As an improvement, a connecting slope one is dug between the fixing groove one and the connecting groove one, the connecting slope one faces the fixing groove one, a connecting slope two is dug between the fixing groove two and the connecting groove two, and the connecting slope two faces the fixing groove two.

[0014] As an improvement, a connecting rod is arranged on the starting side of the protection box two, the center line of the connecting rod is collinear with the center line of the protection box two, a through groove is dug inside the connecting rod, the through groove communicates with the constraint groove two, the connecting head two is in guiding and movable connection with the through groove, a connecting hole is arranged on the starting side of the protection box one, the connecting hole communicates with the constraint groove one, the connecting rod is in guiding and movable connection with the connecting hole, and the outer dimension of the connecting rod corresponds to the inner dimension of the connecting hole.

[0015] As an improvement, the connecting part includes a connecting platform one and a connecting platform two. The connecting platform one is located on the outer side of the protection box one. A guiding rail is dug on one side of the connecting platform one close to the connecting platform two, and the guiding rail penetrates through the connecting platform one. The connecting platform two is located on the outer side of the protection box one. A connecting strip is arranged on one side of the connecting platform two close to the connecting platform one. A limiting member is arranged on one side of the connecting strip close to the connecting platform one. The cross-sectional area of the limiting member is larger than the cross-sectional area of the connecting strip. A connecting slope three is dug on the surface of the limiting member, and the connecting slope three faces the connecting platform one. Under the guidance of the guiding rail, the limiting member can move along it.

[0016] A using method of a cable joint protection box includes the following steps:

[0017] Step 1, insert a cable into the box cover one, the plugging member one, and the gasket one in sequence, then connect this cable with the connecting head one, put the part of this cable connected with the connecting head one into the constraint member one, the constraint member one touches the connecting head one, put the connecting head one and the constraint member one into the protection box one, make the gasket one move in the connecting groove one, rotate the gasket one, the telescopic rod one touches the constraint member one, send the plugging member one into the fixing groove one, the telescopic rod one is compressed and shrinks, and screw the box cover one onto the ending side of the protection box one.

[0018] Step 2: Insert another cable in sequence into the second box cover, the second sealing member, and the second washer. Connect this cable to the second connector. Wrap this cable with the second restraint member. Put the second connector and the second restraint member into the second protection box, and make the second washer move into the second connection groove. The second telescopic rod touches the second restraint member, and make the box cover move along this cable. The box cover makes the second sealing member come into the second fixing groove. When the box cover touches the end side of the second protection box, rotate the box cover and screw the box cover to the end side of the box cover.

[0019] Step 3: Put the connecting rod on the second protection box into the connecting hole of the first protection box, and insert the second connector into the first connector. Then make the first protection box move towards the second protection box. The bases on the first connector and the second connector touch each other. The first connector and the second connector drive the first restraint member and the second restraint member to move in opposite directions along the first protection box. The first telescopic rod and the second telescopic rod are compressed and contracted. When the connecting strip approaches the guide rail, rotate the first protection box or the second protection box to ensure that the connecting strip faces the guide rail. Then make the first protection box move towards the second protection box again. Release the first protection box and the second protection box. The first telescopic rod and the second telescopic rod extend to make the limiting member contact the first connecting platform, completing the overall connection.

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

[0021] 1. When installing the present invention, there is no need to screw multiple bolts and nuts. Just screw the first box cover and the second box cover to the specified positions, and the installation efficiency is high.

[0022] 2. By arranging the first restraint member and the second restraint member, the present invention ensures that the center lines of the cables in the first cable groove and the cables on the first connector are collinear, and the center lines of the cables in the second cable groove and the cables on the second connector are collinear, preventing the connection between the cables and the first connector and the second connector from failing due to the torsional force caused by the torsion of the cables.

[0023] 3. When the first connector and the second connector touch each other, the first telescopic rod and the second telescopic rod are squeezed and contracted, and apply a force to make the first connector and the second connector tightly adhere to each other, ensuring effective contact between the cables, the first connector, and the second connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is an exploded schematic view of the present invention;

[0025] Figure 2 is a three-dimensional schematic view of the present invention;

[0026] Figure 3 is an internal schematic view of the present invention;

[0027] Figure 4 is an enlarged schematic view of part A of the present invention;

[0028] Figure 5 Schematic enlarged view of location B of the present invention;

[0029] Figure 6 Schematic enlarged view of location C of the present invention;

[0030] Figure 7 Internal schematic view of protection box 1 of the present invention;

[0031] Figure 8 Internal schematic view of protection box 2 of the present invention;

[0032] Figure 9 Three-dimensional schematic view of restraint member 1 of the present invention;

[0033] Figure 10 Three-dimensional schematic view of restraint member 2 of the present invention.

[0034] 211. Protection box 1; 212. Connector 1; 213. Restraint member 1; 214. Fixing groove 1; 215. Connecting groove 1; 216. Restraint groove 1; 217. Restraint sleeve 1; 218. Projection 1; 219. Guide groove 1; 2110. Base; 221. Guide groove 1; 222. Restraint bar 1; 223. Connecting rod; 311. Protection box 2; 312. Connector 2; 313. Restraint member 2; 314. Fixing groove 2; 315. Connecting groove 2; 316. Restraint groove 2; 317. Restraint sleeve 2; 318. Guide groove 2; 319. Projection 2; 3110. Guide groove 2; 321. Restraint bar 2; 322. Connecting hole; 323. Penetrating groove; 412. Sealing member 1; 413. Washer 1; 414. Box cover 1; 415. Sealing member 2; 416. Washer 2; 417. Box cover 2; 418. Telescopic rod 1; 419. Telescopic rod 2; 512. Connecting platform 1; 513. Connecting platform 2; 514. Guide rail; 515. Connecting bar. Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described in this application are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the spirit of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] Embodiment 1

[0037] A cable joint protection box

[0038] It includes protection box one 211, protection box two 311, connection head one 212, connection head two 312 and a protection part; both protection box one 211 and protection box two 311 have a start side and an end side. The connection head one 212 is guidingly and movably connected to the protection box one 211 inside the protection box one 211. The connection head two 312 is guidingly and movably connected to the protection box two 311 inside the protection box two 311. Both the connection head one 212 and the connection head two 312 are used for electrically connecting to a cable. The protection part includes a connection part, restraint part one and restraint part two. The connection part is used for connecting the protection box one 211 and the protection box two 311 together. The restraint part one includes restraint member one 213 and telescopic rod one 418. The restraint member one 213 is guidingly and movably connected to the protection box one 211 inside the protection box one 211. The restraint member one 213 is located between the connection head one 212 and the start side of the protection box one 211. A cable groove one is dug on the surface of the restraint member one 213. The telescopic rod one 418 is located between the end side of the protection box one 211 and the restraint member one 213, and is used to drive the restraint member one 213 to move. The restraint part two includes restraint member two 313 and telescopic rod two 419. The restraint member two 313 is guidingly and movably connected to the protection box two 311 inside the protection box two 311. The restraint member two 313 is located between the connection head two 312 and the end side of the protection box two 311. A cable groove two is dug on the surface of the restraint member two 313. Both the cable groove one and the cable groove two are used for restraining the cable. The telescopic rod two 419 is located between the end side of the protection box two 311 and the restraint member two 313, and is used to drive the restraint member two 313 to move. The restraint member one 213 and the restraint member two 313 are both made of high-elastic polymer materials.

[0039] In a preferred but non-limiting embodiment of the present invention, when the protection box one 211 and the protection box two 311 are connected, the side of the connection head one 212 close to the connection head two 312 is inside the connection head two 312 and is in contact with the connection head two 312. A base 2110 is arranged on the surface of the side of the connection head one 212 close to the restraint member one 213. The connection head two 312 is in contact with the base 2110.

[0040] The first connector 212 and the second connector 312 are respectively connected to two cables. The first connector 212 is placed into the first protection box 211, and the second connector 312 is placed into the second protection box 311. The first protection box 211 is connected to the second protection box 311 by means of a connecting part. The first connector 212 is in contact with the second connector 312. The first restraint member 213 and the second restraint member 313 are arranged to ensure that the center lines of the cables in the first cable trench and the cables on the first connector 212 are collinear, and the center lines of the cables in the second cable trench and the cables on the second connector 312 are collinear, preventing the connection failure of the cables with the first connector 212 and the second connector 312 caused by the torsional force generated by the cables. The first connector 212 is in contact with the second connector 312, making the cables, the first connector 212, and the second connector 312 conduct. The first telescopic rod 418 and the second telescopic rod 419 are squeezed and contracted when the first connector 212 is in contact with the second connector 312, and apply a force to make the first connector 212 and the second connector 312 tightly adhere to each other, ensuring effective contact between the first connector 212 and the second connector 312.

[0041] In a preferred but non-limiting embodiment of the present invention, a first restraint sleeve 217 is arranged on the inner surface of the first protection box 211. A first guiding groove 219 is dug on the inner surface of the first restraint sleeve 217. The first guiding groove 219 is located at a position on the inner surface of the first restraint sleeve 217 away from the starting side of the first protection box 211. The outer dimension of the base 2110 corresponds to the inner dimension of the first restraint sleeve 217. The base 2110 is in guiding and movable connection with the first restraint sleeve 217. A first protrusion 218 is arranged on the surface of the base 2110. The first protrusion 218 is in guiding and movable connection with the first guiding groove 219. A second restraint sleeve 317 is arranged on the inner surface of the second protection box 311. A second guiding groove 318 is dug on the inner surface of the second restraint sleeve 317. The second guiding groove 318 is located at a position on the inner surface of the second restraint sleeve 317 away from the starting side of the second protection box 311. A second protrusion 319 is arranged on the surface of the second connector 312. The second protrusion 319 is in guiding and movable connection with the second guiding groove 318.

[0042] In a preferred but non-limiting embodiment of the present invention, on the inner side of the first protection box 211, a first fixing groove 214, a first connecting groove 215, and a first restraining groove 216 are arranged in sequence from its end side towards the side close to the first restraining sleeve 217. The first fixing groove 214 communicates with the first restraining groove 216 through the first connecting groove 215. The first restraining member 213 is in guiding and movable connection with the first restraining groove 216. The center lines of the first fixing groove 214, the first connecting groove 215, and the first cable groove are collinear. On the inner side of the second protection box 311, a second fixing groove 314, a second connecting groove 315, and a second restraining groove 316 are arranged in sequence from its end side towards the side close to the second restraining sleeve 317. And the second fixing groove 314 is communicated with the second restraining groove 316 through the second connecting groove 315. The axes of the second fixing groove 314 and the second connecting groove 315 coincide with the axis of the second wire groove on the second restraining member 313.

[0043] In a preferred but non-limiting embodiment of the present invention, the first restraining part further includes a first sealing member 412, a first washer 413, and a first box cover 414. The first sealing member 412 is in guiding and movable connection with the first fixing groove 214. The first washer 413 is in guiding and movable connection with the first connecting groove 215. The first telescopic rod 418 is fixedly connected with the first washer 413. The side of the first telescopic rod 418 away from the first washer 413 contacts the first restraining member 213. On one side of the first box cover 414, a first internal thread is arranged. On one side of the first protection box 211, an external thread matching the first internal thread is arranged. The first box cover 414 and the first protection box 211 are connected through the first internal thread and the external thread. The center line of the first box cover 414 is collinear with the center line of the first fixing groove 214. When the first box cover 414 rotates relative to the first protection box 211, the first box cover 414 applies a force to the first sealing member 412, and the first sealing member 412 deforms under the force to seal the surrounding gaps. The second restraining part further includes a second sealing member 415, a second washer 416, and a second box cover 417. The second sealing member 415 is in guiding and movable connection with the second fixing groove 314. The second washer 416 is in guiding and movable connection with the second connecting groove 315. The second telescopic rod 419 is fixedly connected with the second washer 416. One side of the second telescopic rod 419 contacts the second restraining member 313. On one side of the first box cover 414, a second internal thread is arranged. On one side of the second protection box 311, an external thread matching the second internal thread is arranged. The second box cover 417 and the second protection box 311 are connected through the second internal thread and the external thread. The center line of the second box cover 417 is collinear with the center line of the second fixing groove 314. When the second box cover 417 rotates relative to the second protection box 311, the second box cover 417 applies a force to the second sealing member 415, and the second sealing member 415 deforms under the force to seal the surrounding gaps.

[0044] In a preferred but non-limiting embodiment of the present invention, a guiding groove one 221 is dug on the restraining groove one 216, a restraining strip one 222 is arranged on the restraining member one 213, the restraining strip one 222 is in guiding and movable connection with the guiding groove one 221, a guiding groove two 3110 is dug on the restraining groove two 316, a restraining strip two 321 is arranged on the restraining member two 313, and the restraining strip two 321 is in guiding and movable connection with the guiding groove two 3110.

[0045] In a preferred but non-limiting embodiment of the present invention, a connecting slope one is dug between the fixing groove one 214 and the connecting groove one 215, the connecting slope one faces the fixing groove one 214, a connecting slope two is dug between the fixing groove two 314 and the connecting groove two 315, and the connecting slope two faces the fixing groove two 314.

[0046] In a preferred but non-limiting embodiment of the present invention, a connecting rod 223 is arranged on the starting side of the protection box two 311, the center line of the connecting rod 223 is collinear with the center line of the protection box two 311, a through groove 323 is dug inside the connecting rod 223, the through groove 323 communicates with the restraining groove two 316, the connecting head two 312 is in guiding and movable connection with the through groove 323, a connecting hole 322 is arranged on the starting side of the protection box one 211, the connecting hole 322 communicates with the restraining groove one 216, the connecting rod 223 is in guiding and movable connection with the connecting hole 322, and the outer dimension of the connecting rod 223 corresponds to the inner dimension of the connecting hole 322.

[0047] In a preferred but non-limiting embodiment of the present invention, the connecting part includes a connecting platform one 512 and a connecting platform two 513. The connecting platform one 512 is located on the outer side of the protection box one 211. A guiding rail 514 is dug on one side of the connecting platform one 512 close to the connecting platform two 513. The guiding rail 514 penetrates through the connecting platform one 512. The connecting platform two 513 is located on the outer side of the protection box one 211. A connecting strip 515 is arranged on one side of the connecting platform two 513 close to the connecting platform one 512. The connecting strip 515 can be deformed. A limiting member is arranged on one side of the connecting strip 515 close to the connecting platform one 512. The cross-sectional area of the limiting member is larger than the cross-sectional area of the connecting strip 515. A connecting slope three is dug on the surface of the limiting member, and the connecting slope three faces the connecting platform one 512. Under the guiding of the guiding rail 514, the limiting member can move along it.

[0048] Embodiment 2

[0049] A method for using a cable joint protection box includes the following steps:

[0050] Step 1: Insert a cable into the cover 1 - 414, the plug 1 - 412, and the washer 1 - 413 in sequence. Then connect this cable to the connector 1 - 212, and place the part of the cable connected to the connector 1 - 212 into the restraint 1 - 213. The restraint 1 - 213 touches the connector 1 - 212. Put the connector 1 - 212 and the restraint 1 - 213 into the protection box 1 - 211, so that the restraint 1 - 213 enters the protection box 1 - 211. The restraint 1 - 213 causes the connector 1 - 212 to move within the protection box 1 - 211. The connector 1 - 212 passes through the fixed groove 1 - 214, the connection groove 1 - 215, and the restraint groove 1 - 216 in sequence. When the restraint 1 - 213 enters the restraint groove 1 - 216, the restraint bar 1 - 222 moves into the guiding groove 1 - 221. Then, cause the restraint 1 - 213 to move. The restraint 1 - 213 causes the connector 1 - 212 to move. The connector 1 - 212 penetrates through the restraint sleeve 1 - 217 and extends into the connection hole 322. The protrusion 1 - 218 moves into the guiding groove 1 - 219. The connector 1 - 212 and the restraint 1 - 213 can only move along the extension direction of the protection box 1 - 211. Then, cause the washer 1 - 413 to move within the connection groove 1 - 215, rotate the washer 1 - 413, the telescopic rod 1 - 418 touches the restraint 1 - 213, send the plug 1 - 412 into the fixed groove 1 - 214, the telescopic rod 1 - 418 is compressed and shrinks, and the degree of obstruction to the upward movement of the restraint 1 - 213 and the connector 1 - 212 along the extension of the protection box 1 - 211 increases. Screw the cover 1 - 414 onto the end side of the protection box 1 - 211.

[0051] Step 2: Insert another cable into the cover 2 - 417, the plug 2 - 415, and the washer 2 - 416 in sequence. Connect this cable to the connector 2 - 312, wrap this cable with the restraint 2 - 313. Put the connector 2 - 312 and the restraint 2 - 313 into the protection box 2 - 311. The connector 2 - 312 passes through the fixed groove 2 - 314, the connection groove 2 - 315, the restraint groove 2 - 316, and the restraint sleeve 2 - 317 in sequence, and finally moves into the through - groove 323. The protrusion 2 - 319 moves into the guiding groove 2 - 318. The restraint 2 - 313 moves into the restraint groove 2 - 316. If the restraint 2 - 313 moves within the restraint groove 2 - 316, then the restraint bar 2 - 321 moves within the guiding groove 2 - 3110. The restraint 2 - 313 and the connector 2 - 312 can only move along the extension direction of the protection box 2 - 311. Cause the washer 2 - 416 to move into the connection groove 2 - 315, the telescopic rod 2 - 419 touches the restraint 2 - 313, so that the cover 2 - 417 moves along this cable. The cover 2 - 417 causes the plug 2 - 415 to come into the fixed groove 2 - 314. When the cover 2 - 417 touches the end side of the protection box 2 - 311, rotate the cover 2 - 417 and screw the cover 2 - 417 onto the end side of the cover 2 - 417.

[0052] Step 3: Place the connecting rod 223 on the second protection box 311 into the connecting hole 322 of the first protection box 211, insert the second connecting head 312 into the first connecting head 212, then move the first protection box 211 towards the second protection box 311. The base 2110 on the first connecting head 212 touches the base on the second connecting head 312. The first connecting head 212 and the second connecting head 312 drive the first restraint member 213 and the second restraint member 313 to move in opposite directions along the extension of the first protection box 211 respectively. The first telescopic rod 418 and the second telescopic rod 419 are compressed and contracted. When the connecting strip 515 approaches the guide rail 514, rotate the first protection box 211 or the second protection box 311 to ensure that the connecting strip 515 faces the guide rail 514. Then move the first protection box 211 towards the second protection box 311 again. A part of the limiting member first enters the guide rail 514, and then the third connecting slope on the limiting member initially touches the guide rail 514. Subsequently, the limiting member moves along the guide rail 514. There is a force between the limiting member and the guide rail 514, causing the connecting strip 515 to bend. After the limiting member disengages from the guide rail 514, the connecting strip 515 begins to return to its initial posture. Release the first protection box 211 and the second protection box 311. The first telescopic rod 418 and the second telescopic rod 419 extend so that the limiting member contacts the first connecting platform 512, completing the overall connection.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific implementation manners of the present invention. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A cable joint protection box, characterized in that: It includes a protection box 1, a protection box 2, a connector 1, a connector 2 and a protection part; the protection box 1 and the protection box 2 both have a start side and an end side, the connector 1 is connected with the protection box 1 guide movement inside the protection box 1, the connector 2 is connected with the protection box 2 guide movement inside the protection box 2, the connector 1 and the connector 2 are both used to be electrically connected with the cable, the protection part includes a connector, a constraint part 1 and a constraint part 2, the connector is used to connect the protection box 1 and the protection box 2 together, the constraint part 1 includes a constraint part 1 and a telescopic rod 1, the constraint part 1 is connected with the protection box 1 guide movement inside the protection box 1, the One restraint part is located at the starting side of connector 1 and protective box 1, and a cable groove 1 is dug on the surface of restraint part 1. One telescopic rod is located at the ending side of protective box 1 and restraint part 1, and is used to promote the movement of restraint part 1. The second restraint part includes restraint part 2 and telescopic rod 2. The restraint part 2 is connected to the guide of protective box 2 in protective box 2. The restraint part 2 is located at the ending side of connector 2 and protective box 2, and a cable groove 2 is dug on the surface of restraint part 2. Both cable groove 1 and cable groove 2 are used to restrain cables. The telescopic rod 2 is located at the ending side of protective box 2 and restraint part 2, and is used to promote the movement of restraint part 2.

2. A cable joint protection box according to claim 1, characterized in that: When the connection between protection box 1 and protection box 2 is completed, the side of connector 1 close to connector 2 is located inside connector 2 and contacts connector 2, a base is arranged on the surface of the side of connector 1 close to restraint member 1, and connector 2 contacts the base.

3. A cable joint protection box according to claim 2, characterized in that: A constraint sleeve 1 is arranged on the inner surface of the protection box 1, and a guide groove 1 is dug on the inner surface of the constraint sleeve 1. The guide groove 1 is located on the inner surface of the constraint sleeve 1 away from the starting side of the protection box. The outer size of the base corresponds to the inner size of the constraint sleeve 1. The base and the constraint sleeve 1 are guided and movably connected. A protrusion 1 is arranged on the surface of the base, and the protrusion 1 is guided and movably connected with the guide groove 1. A constraint sleeve 2 is arranged on the inner surface of the protection box 2, and a guide groove 2 is dug on the inner surface of the constraint sleeve 2. The guide groove 2 is located on the inner surface of the constraint sleeve 2 away from the starting side of the protection box 2. A protrusion 2 is arranged on the surface of the connector 2, and the protrusion 2 is guided and movably connected with the guide groove 2.

4. A cable joint protection box according to claim 3, characterized in that: The inner side of the protection box 1 is arranged in sequence from its end side to the side close to the constraint sleeve 1, the fixing groove 1 is communicated with the constraint groove 1 by means of the connecting groove 1, the constraint member 1 is guide-movably connected with the constraint groove 1, the center line of the fixing groove 1, the center line of the connecting groove 1 and the center line of the cable groove 1 are on the same line, and the inner side of the protection box 2 is arranged in sequence from its end side to the side close to the constraint sleeve 2, the fixing groove 2 is communicated with the constraint groove 2 through the connecting groove 2, and the axes of the fixing groove 2 and the connecting groove 2 coincide with the axis of the second wire groove on the constraint member 2.

5. A cable joint protection box according to claim 4, characterized in that: The constraint part 1 also includes a blocking piece 1, a gasket 1 and a box cover 1. The blocking piece 1 is connected to a fixed groove 1 for guiding and movably engaging, the gasket 1 is connected to a connecting groove 1 for guiding and movably engaging, the telescopic rod 1 is fixedly connected to the gasket 1, the telescopic rod 1 is in contact with a binding piece 1 on one side away from the gasket 1, an inner thread 1 is arranged on one side of the box cover 1, an outer thread 1 matched with the inner thread 1 is arranged on one side of the protection box 1, the box cover 1 and the protection box 1 are connected by means of the inner thread 1 and the outer thread 1, and the center line of the box cover 1 is aligned with the center line of the fixed groove 1 The second constraint part is collinear, and the second blocking part also includes a second blocking piece, a second gasket and a second box cover. The second blocking piece is movably connected with the second fixing groove for guiding movement, the second gasket is movably connected with the second connecting groove for guiding movement, the second telescopic rod is fixedly connected with the second gasket, one side of the second telescopic rod is in contact with the second binding piece, two inner threads are arranged on one side of the first box cover, and two outer threads matching with the two inner threads are arranged on one side of the second protection box. The second box cover is connected with the second protection box by means of the two inner threads and the two outer threads, and the center line of the second box cover is collinear with the center line of the second fixing groove.

6. A cable joint protection box according to claim 4, characterized in that: A guide groove 1 is dug on the constraint groove 1, a constraint strip 1 is arranged on the constraint member 1, and the constraint strip 1 is connected with the guide groove 1 for guiding movement; a guide groove 2 is dug on the constraint groove 2, a constraint strip 2 is arranged on the constraint member 2, and the constraint strip 2 is connected with the guide groove 2 for guiding movement.

7. A cable joint protection box according to claim 4, characterized in that: A connecting slope 1 is dug between the fixing groove 1 and the connecting groove 1, and the connecting slope 1 faces the fixing groove 1. A connecting slope 2 is dug between the fixing groove 2 and the connecting groove 2, and the connecting slope 2 faces the fixing groove 2.

8. The cable joint protection box according to claim 4, characterized in that: A connecting rod is arranged on the starting side of the second protection box, and the center line of the connecting rod is colinear with the center line of the second protection box. A through groove is dug on the inner side of the connecting rod, and the through groove is communicated with the second constraint groove. The second connector is connected to the through groove for guiding movement. A connecting hole is arranged on the starting side of the first protection box, and the connecting hole is communicated with the first constraint groove. The connecting rod is connected to the connecting hole for guiding movement, and the outer size of the connecting rod corresponds to the inner size of the connecting hole.

9. The cable joint protection box according to claim 1, characterized in that: The connecting part includes a connecting platform 1 and a connecting platform 2, wherein the connecting platform 1 is located at the outer side of the protection box 1, a guide rail is dug on the side of the connecting platform 1 close to the connecting platform 2, and the guide rail is passed through the connecting platform 1, and the connecting platform 2 is located at the outer side of the protection box 1, a connecting strip is arranged on the side of the connecting platform 2 close to the connecting platform 1, and a limiting member is arranged on the side of the connecting strip close to the connecting platform 1, the cross-sectional area of ​​the limiting member is higher than the cross-sectional area of ​​the connecting strip, and a connecting slope 3 is dug on the surface of the limiting member, and the connecting slope 3 faces the connecting platform 1, and the limiting member can move along it under the guidance of the guide rail.

10. A method for using a cable joint protection box according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1, insert a cable into the box cover 1, the sealing part 1, and the gasket 1 in sequence, then connect the cable and the connector 1, put the part of the cable connected to the connector 1 into the constraint 1, the constraint 1 and the connector 1 touch each other, put the connector 1 and the constraint 1 into the protective box 1, make the gasket 1 move in the connecting groove 1, rotate the gasket 1, the telescopic rod 1 and the constraint 1 touch each other, send the sealing part 1 into the fixed groove 1, the telescopic rod 1 is compressed and contracted, and the box cover 1 is screwed to the end side of the protective box 1. Step 2, insert another cable into the second box cover, the second sealing piece, and the second gasket in sequence, connect this cable with the second connector, wrap this cable with the second constraint, put the second connector and the second constraint into the second protective box, and make the second gasket move into the second connecting groove. The second telescopic rod and the second constraint touch each other, so that the second box cover moves along the cable, and the second box cover makes the second sealing piece come into the second fixed groove. When the second box cover touches the end side of the second protective box, rotate the second box cover and screw it to the end side of the second box cover. Step 3, put the connecting rod on the protection box 2 into the connecting hole of the protection box 1, and extend the connector 2 into the connector 1, then push the protection box 1 toward the protection box 2, the bases on the connector 1 and the connector 2 touch each other, and the connector 1 and the connector 2 respectively drive the constraint part 1 and the constraint part 2 to move in the opposite direction along the extension of the protection box 1, and the telescopic rod 1 and the telescopic rod 2 are compressed and contracted. When the connecting strip approaches the guide rail, rotate the protection box 1 or the protection box 2 to ensure that the connecting strip is facing the guide rail, and push the protection box 1 toward the protection box 2 again, release the protection box 1 and the protection box 2, and the telescopic rod 1 and the telescopic rod 2 are extended to make the limit part and the connection platform 1 contact, completing the overall connection.

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