Cold contraction cable accessory

Abstract

The utility model relates to the technical field of cold contraction type cable accessories, in particular to a cold contraction type cable accessory which comprises a protective shell, a first limiting baffle and a second limiting baffle are arranged at the two ends in the protective shell, an ejector rod is connected between the first limiting baffle and the second limiting baffle in a sliding mode, and one end of the ejector rod is fixedly connected with a clamping block. A plurality of control teeth are arranged on one side of the second limiting baffle, a second limiting sliding groove is formed in the position, close to the control teeth, in the protection shell, a stopping block is slidably connected into the second limiting sliding groove, and clamping teeth are arranged at the bottom of the stopping block. One-way locking is achieved through interaction of the control teeth and the clamping teeth, when the control handle is rotated, the clamping blocks extrude inwards in the protection shell through the second limiting baffle, the control grooves and the limiting bolts, the cold shrink pipe is fixed, and the attaching tightness between the cold shrink pipe and a cable is prevented from being reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cold shrink cable accessories, in particular to a cold shrink cable accessory. Background Art

[0002] Cold-shrink cable accessories are a type of cable connection device that requires a very delicate manufacturing process. First, in the factory, the various components of cold-shrink cable accessories are made using elastomer materials through injection vulcanization molding technology. To ensure that these components can be smoothly sleeved on the cable, they are also expanded and lined with plastic spiral supports inside to maintain their expanded state.

[0003] During the on-site installation, the operator will put these pre-expanded cold shrink cable accessories on the carefully processed cable ends or joints. Then, by pulling out the internal plastic spiral support, the cold shrink tube can gradually return to normal temperature under the action of its inherent physical properties and shrink tightly to fit the outside of the cable. In this way, a cable accessory with a tight structure and excellent performance is formed.

[0004] However, there is a potential problem in the existing technology. As time goes by, after long-term use, the tightness between the end of the cold shrink cable accessory and the cable will gradually decrease. This decrease in fit may allow external moisture to have the opportunity to penetrate into the interior of the cold shrink tube. Once moisture enters, it may not only affect the working performance of the cold shrink tube, but is more likely to cause a short circuit failure of the cable, posing a serious threat to the stable operation of the power system. Utility Model Content

[0005] The purpose of the utility model is to provide a cold shrink cable accessory to solve the problem proposed in the above background technology that the fit between the cold shrink tube and the cable may decrease after long-term use, providing a possibility for external moisture to intrude, thereby threatening the working performance of the cold shrink tube and the stable operation of the power system.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a cold shrink cable accessory, including a protective shell, wherein both ends of the protective shell are provided with a limit baffle plate 1 and a limit baffle plate 2, a push rod is slidably connected between the limit baffle plate 1 and the limit baffle plate 2, one end of the push rod is fixedly connected with a clamping block, a plurality of control teeth are arranged on one side of the limit baffle plate 2, a limit slot 2 is provided near the control teeth inside the protective shell, a stop block is slidably connected inside the limit slot 2, a locking tooth is provided at the bottom of the stop block, a spring is fixedly connected to one side of the stop block, a nut rod is provided on the side wall of the stop block located inside the spring, and a screw rod is threadedly connected inside the nut rod.

[0007] The utility model is further configured as follows: control grooves are provided on the surfaces of the first and second limit baffles, limit bolts are fixedly connected on both sides of the push rod, one end of the limit bolts extends into the control groove and is slidably connected to the inner wall of the limit bolts, and a control handle is fixedly connected to one side of the second limit baffle, and the control handle passes through the protective shell and is slidably connected.

[0008] The utility model is further configured that a limiting slide groove is provided in the protective shell near the top rod, and one end of the top rod extends into the inside of the limiting slide groove and is slidably connected to the inner wall of the limiting slide groove.

[0009] The utility model is further configured that the outer sides of both ends of the protective shell are provided with mounting holes, the screw rod is arranged inside the mounting hole, and the side wall of the nut rod is provided with a mounting groove.

[0010] The utility model is further configured that the side wall of the screw rod is provided with a second installation groove, a first sealing ring is arranged inside the first installation groove, and a second sealing ring is arranged inside the second installation groove.

[0011] The utility model is further configured such that the latching tooth is meshedly connected with the control tooth, and one end of the spring is fixedly connected with the inner wall of the protective shell.

[0012] The utility model is further configured that a cold shrink tube is arranged inside the protective shell, a support is arranged inside the cold shrink tube, and a cable is arranged inside the support.

[0013] Beneficial effects of the cold shrink cable accessory of the utility model:

[0014] Put the cold shrink tube on the cable, then put on the protective shell, rotate the control handle, and achieve one-way locking through the interaction of the control teeth and the latch teeth. The design of the control teeth and the latch teeth allows smooth forward rotation and locks in the reverse direction. The spring ensures that the stop block always applies pressure to the control teeth. When rotating the control handle, the clamp block is squeezed inward in the protective shell through the second limit baffle, the control groove and the limit bolt to fix the cold shrink tube to avoid a decrease in the fit between the cold shrink tube and the cable and to prevent external moisture from entering the interior of the cold shrink tube and causing a cable short circuit. When the protective shell needs to be removed, rotate the screw to release the lock, and reversely rotate the control handle to remove it, which is convenient for dismantling the entire device for cable maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art description. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0016] Figure 1 This is a three-dimensional structural diagram of a cold shrink cable accessory according to an embodiment of the utility model;

[0017] Figure 2 This is an exploded view of a cold shrink cable accessory according to an embodiment of the utility model;

[0018] Figure 3 This is a cross-sectional view of a cold shrink cable accessory according to an embodiment of the utility model;

[0019] Figure 4 A cold shrink cable accessory according to the embodiment of the utility model Figure 2 Explosion diagram at A in the middle;

[0020] Figure 5 A cold shrink cable accessory according to the embodiment of the utility model Figure 2 A partial enlarged view of point B in the middle.

[0021] The markings in the figure are: 1. Protective shell; 2. Limit slide groove 1; 3. Limit slide groove 2; 4. Limit baffle 1; 5. Limit baffle 2; 6. Control groove; 7. Push rod; 8. Limit bolt; 9. Clamp; 10. Control tooth; 11. Control handle; 12. Stop block; 13. Nut rod; 14. Spring; 15. Installation groove 1; 16. Sealing ring 1; 17. Screw; 18. Installation groove 2; 19. Sealing ring 2; 20. Installation hole; 21. Cold shrink tube; 22. Support; 23. Cable. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other; the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0023] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left" and "right" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the positions or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limitations of the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or a transmission connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements.

[0024] See also Figure 1 , 2 and Figure 3 , 4 5. A cold shrink cable accessory comprises a protective shell 1, wherein both ends of the protective shell 1 are provided with a limit baffle 1 4 and a limit baffle 2 5, a push rod 7 is slidably connected between the limit baffle 1 4 and the limit baffle 2 5, a clamping block 9 is fixedly connected to one end of the push rod 7, a plurality of control teeth 10 are arranged on one side of the limit baffle 2 5, a limit slide groove 2 3 is arranged near the control tooth 10 in the protective shell 1, a stop block 12 is slidably connected inside the limit slide groove 2 3, a locking tooth is arranged at the bottom of the stop block 12, a spring 14 is fixedly connected to one side of the stop block 12, a nut rod 13 is arranged on the side wall of the stop block 12 at the internal position of the spring 14, a screw rod 17 is threadedly connected inside the nut rod 13, a cold shrink tube 21 is arranged inside the protective shell 1, a support 22 is arranged inside the cold shrink tube 21, and a cable 23 is arranged inside the support 22.

[0025] By adopting the above technical solution, when using the cold shrink tube 21, put it on the cable 23, pull out the support 22, and the cold shrink tube will be close to the cable. Then, put on the protective shell 1, rotate the control handle 11, and realize one-way locking through the interaction between the control teeth 10 and the latch teeth. The design of the control teeth 10 and the latch teeth makes the forward rotation smooth and the reverse rotation is locked. The spring 14 ensures that the stop block 12 always applies pressure to the control teeth 10. When the control handle is rotated, the clamping block 9 is squeezed inward in the protective shell 1 through the limit baffle 2 5, the control groove 6 and the limit bolt 8 to fix the cold shrink tube. When the protective shell needs to be removed, the screw 17 is rotated to release the lock, and the control handle is rotated in the reverse direction to remove it.

[0026] Control grooves 6 are provided on the surfaces of the limit baffle 1 4 and the limit baffle 2 5. Limit bolts 8 are fixedly connected to both sides of the push rod 7. One end of the limit bolt 8 extends to the inside of the control groove 6 and is slidably connected to the inner wall of the limit bolt 8. A control handle 11 is fixedly connected to one side of the limit baffle 2 5. The control handle 11 penetrates the protective shell 1 and is slidably connected. A limit slide groove 2 is provided near the push rod 7 inside the protective shell 1. One end of the push rod 7 extends to the inside of the limit slide groove 2 and is slidably connected to the inner wall of the limit slide groove 2. The latch teeth are meshed with the control teeth 10, and one end of the spring 14 is fixedly connected to the inner wall of the protective shell 1.

[0027] By adopting the above technical solution, when the limit baffle plate 2 5 is controlled to rotate, the limit baffle plate 2 5 will squeeze the limit bolt 8 through the control groove 6. Because one end of the push rod 7 is restricted in the interior of the limit slide groove 2 and can only move horizontally, the limit bolt 8 will drive the push rod 7 to move horizontally when it is displaced, thereby controlling the clamping block 9 to be squeezed inward in the protective shell 1, so that the clamping block 9 fixes the two ends of the cold shrink tube 21, so that it always keeps close contact with the cable 23.

[0028] The protective shell 1 has mounting holes 20 at both ends thereof, the screw rod 17 is arranged inside the mounting hole 20, the nut rod 13 has a mounting groove 15 on the side wall, the screw rod 17 has a mounting groove 2 18 on the side wall, the mounting groove 15 has a sealing ring 16 on the inside, and the mounting groove 2 18 has a sealing ring 19 on the inside.

[0029] By adopting the above technical solution, the sealing ring 16 and the sealing ring 2 19 are used to prevent the nut rod 13 and the screw rod 17 from rusting inside.

[0030] The working principle of the utility model is that the tightness between the cold shrink tube and the cable may decrease after long-term use, which provides the possibility for external moisture to enter, thereby threatening the working performance of the cold shrink tube and the stable operation of the power system;

[0031] When in use, place the cable 23 into the cold shrink tube 21, then pull the support 22 to completely remove the support 22 from the inside of the cold shrink tube 21, and then the cold shrink tube 21 will shrink and fit tightly to the surface of the cable 23. After the cold shrink tube 21 is shrunk, put the protective shell 1 on the outside of the cold shrink tube 21, and then turn the control handle 11 to drive the limit baffle 25 to rotate. The control teeth 10 on the limit baffle 25 and the clamping teeth on the stop block 12 are both sloped on one side and vertical on the other side. The sloped side of the control teeth 10 and the sloped side of the clamping teeth are perpendicular to each other. When the limit baffle plate 25 drives the control tooth 10 to rotate normally, it will squeeze the side of the card tooth with a slope through the slope side rotation, so that the stop block 12 moves up and the limit baffle plate 25 rotates normally. When the limit baffle plate 25 rotates in the opposite direction, it will drive the side of the vertical structure of the control tooth 10 to squeeze the side of the vertical structure of the card tooth, and the two will be stuck. At this time, the limit baffle plate 25 cannot rotate to lock it, and the spring 14 is used to keep the stop block 12 always pressed against the control tooth 10.

[0032] When the control limit baffle plate 25 is rotated, the limit baffle plate 25 will squeeze the limit bolt 8 through the control groove 6. Because one end of the push rod 7 is restricted in the inside of the limit slide groove 2 and can only move horizontally, the limit bolt 8 will drive the push rod 7 to move horizontally when it is displaced, thereby controlling the clamping block 9 to be squeezed inward in the protective shell 1, so that the clamping block 9 fixes the two ends of the cold shrink tube 21 so that it always keeps close contact with the cable 23. At the same time, after loosening the control handle 11, the limit baffle plate 25 cannot be reversely rotated because it is locked. When the protective shell 1 needs to be removed, it is only necessary to rotate the screw 17 to drive the stop block 12 to move up and separate from the control tooth 10 through the screw 17, and then reversely rotate the limit baffle plate 25 to open the clamping block 9 and remove it.

[0033] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0034] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A cold shrink cable accessory, comprising a protective housing (1), characterized in that: A limit baffle plate 1 (4) and a limit baffle plate 2 (5) are provided at both ends of the protective shell (1); a push rod (7) is slidably connected between the limit baffle plate 1 (4) and the limit baffle plate 2 (5); a clamping block (9) is fixedly connected to one end of the push rod (7); a plurality of control teeth (10) are provided on one side of the limit baffle plate 2 (5); a limit slide groove 2 (3) is provided at a position close to the control teeth (10) inside the protective shell (1); a stop block (12) is slidably connected inside the limit slide groove 2 (3); a locking tooth is provided at the bottom of the stop block (12); a spring (14) is fixedly connected to one side of the stop block (12); a nut rod (13) is provided on the side wall of the stop block (12) at a position inside the spring (14); a screw rod (17) is threadedly connected inside the nut rod (13).

2. A cold shrink cable accessory according to claim 1, characterized in that: The surfaces of the limit baffle plate 1 (4) and the limit baffle plate 2 (5) are both provided with control grooves (6); the limit bolts (8) are fixedly connected to both sides of the push rod (7); one end of the limit bolt (8) extends into the control groove (6) and is slidably connected to the inner wall of the limit bolt (8); one side of the limit baffle plate 2 (5) is fixedly connected to a control handle (11); the control handle (11) penetrates the protective shell (1) and is slidably connected.

3. A cold shrink cable accessory according to claim 1, characterized in that: A limiting slide groove (2) is provided inside the protective shell (1) near the top rod (7), and one end of the top rod (7) extends into the inside of the limiting slide groove (2) and is slidably connected to the inner wall of the limiting slide groove (2).

4. A cold shrink cable accessory according to claim 1, characterized in that: The protective housing (1) has mounting holes (20) on the outside at both ends, the screw rod (17) is arranged inside the mounting hole (20), and the side wall of the nut rod (13) has a mounting groove (15).

5. A cold shrink cable accessory according to claim 4, characterized in that: The side wall of the screw rod (17) is provided with a second installation groove (18), the interior of the first installation groove (15) is provided with a first sealing ring (16), and the interior of the second installation groove (18) is provided with a second sealing ring (19).

6. The cold shrink cable accessory according to claim 1, characterized in that: The latching teeth are meshedly connected with the control teeth (10), and one end of the spring (14) is fixedly connected with the inner wall of the protective shell (1).

7. The cold shrink cable accessory according to claim 1, characterized in that: A cold shrink tube (21) is arranged inside the protective shell (1), a support (22) is arranged inside the cold shrink tube (21), and a cable (23) is arranged inside the support (22).

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