Power cable outdoor cold shrinkage terminal

Abstract

The utility model relates to the technical field of cable cold shrinkage terminals, in particular to a power cable outdoor cold shrinkage terminal, which comprises a main body, the inside of the main body is hollow, and two ends of the main body are opened, so that when the main body is expanded, supporting strips can be embedded into the inner wall of the main body through the openings to form a temporary framework for supporting the main body; the terminal further comprises two sealing heads, and the sealing heads are installed at the opening of the main body in a detachable mode. According to the utility model, the sealing heads are additionally arranged at the two ends of the existing cable outdoor cold shrinkage terminal, and the openings at the two ends of the main body can be sealed by using the sealing heads, so that the supporting strip is completely sealed in the cable outdoor cold shrinkage terminal, and the sealing heads can limit the two ends of the supporting strip to prevent the supporting strip from loosening or shifting caused by external force; the sealing heads can also prevent water or foreign matters from entering the cable outdoor cold shrinkage terminal through the openings at the two ends of the main body.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable cold shrink terminal technical field especially relates to a kind of outdoor cold shrink terminal of power cable. BACKGROUND

[0002] Cable outdoor cold shrink terminal is a device installed at cable insulation shield, mainly including main body and the umbrella skirt being set at the outer surface of main body, in production process, main body inside is inserted into the support strip with helical shape by expansion, support strip can keep the expansion state of main body as pre-expansion structure, when using, cold shrink terminal is sleeved into cable, adjust to correct position, ensure that cable insulation layer has been handled according to process (such as polishing, cleaning, smearing special glue etc.), pull the pull ring or pull rope at the end of support strip, gradually extract helical or segmented support strip from inside terminal, after support strip removal, cold shrink material loses support, relies on self-elasticity and retracts, tightly wraps cable to form seal.

[0003] At present, the protection of cable outdoor cold shrink terminal is mainly realized by plastic packaging bag, when external force is larger (such as vibration in transportation process, external force extrusion), plastic packaging bag cannot well buffer external force, and it is easy to cause support strip loosening or falling off, leading to pre-expansion structure failure, so that cable outdoor cold shrink terminal can retract before installation, and then lose elastic sealing ability, leading to product directly scrap. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model aims at providing a kind of outdoor cold shrink terminal of power cable to solve the technical problem that the pre-expansion structure of prior art cable outdoor cold shrink terminal is easy to fail due to external force before use.

[0005] To achieve the above purpose, the utility model provides a kind of outdoor cold shrink terminal of power cable, including main body, the inside hollow of main body and both ends are open, so that when the main body is expanded, support strip can be embedded into the inner wall of main body to form the temporary skeleton of support main body, so as to maintain the expansion state of the main body, the terminal also includes two end caps, the end cap is detachably installed at the opening of main body, the end cap and main body form airtight chamber for wrapping and limiting support strip, support strip is completely isolated from external environment by airtight chamber, to prevent external force from acting on support strip and causing loosening, falling off and displacement.

[0006] As a preferred technical scheme of the utility model, the end cap includes top wall and side wall, which is set at the edge of top wall and extends along the direction perpendicular to top wall.

[0007] As a preferred technical scheme of the utility model, the opening of main body extends along the axial length direction to form a stepped cylinder, and the end cap is detachably sleeved on the outer surface of the stepped cylinder.

[0008] As the preferred technical scheme of the utility model, the outer surface of the stepped cylinder is provided with at least one first clamping part, the inner surface of the side wall of the head is provided with at least one second clamping part matched with the first clamping part, the mutual cooperation of the first clamping part and the second clamping part prevents the axial movement of the head relative to the stepped cylinder.

[0009] As the preferred technical scheme of the utility model, the first clamping part or the second clamping part is made of elastic and deformable material.

[0010] As the preferred technical scheme of the utility model, the first clamping part is a first flange outwardly extended along the radial direction of the stepped cylinder, and the second clamping part is a first groove opened in the inner surface of the side wall of the head, after the head is sleeved on the stepped cylinder, the first flange and the first groove are clamped with each other to lock the head and the stepped cylinder in the axial direction.

[0011] As the preferred technical scheme of the utility model, the outer surface of the stepped cylinder is further provided with a second groove, the second groove is matched with a second flange arranged on the inner surface of the side wall of the head, and the second flange and the first flange form a spacing in the axial direction of the main body.

[0012] As the preferred technical scheme of the utility model, the head is provided with an extension section formed in the axial direction on the top wall, and a receiving cavity is formed in the extension section, so that the part of the supporting strip protruding from the stepped cylinder can be accommodated in the receiving cavity.

[0013] As the preferred technical scheme of the utility model, the head is provided with at least one handle on the outer surface of the side wall.

[0014] As the preferred technical scheme of the utility model, the main body is provided with a plurality of umbrella skirts on the outer surface in the axial direction.

[0015] The utility model has the advantages that the head is added to the two ends of the existing cable outdoor cold shrink terminal, the two end openings of the main body are sealed by the head, the supporting strip is completely enclosed in the cable outdoor cold shrink terminal, the head can limit the two ends of the supporting strip, prevent the supporting strip from loosening or shifting due to external force, the head can also prevent water or foreign matters from entering the cable outdoor cold shrink terminal through the two end openings of the main body, and the stability of the cable outdoor cold shrink terminal during transportation can be further improved by cooperating with the existing packaging bag. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below only belong to the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0017] Figure 1 It is a three-dimensional structure schematic diagram of the connection state of the main body and the head of the present application.

[0018] Figure 2 It is a three-dimensional structure schematic diagram of the disassembled state of the main body and the head of the present application.

[0019] Figure 3 It is a local enlarged structure schematic diagram of the connection state of the main body and the head of the present application.

[0020] In the figure, 1 is the main body, 2 is the umbrella skirt, 3 is the lower stepped cylinder, 4 is the upper stepped cylinder, 5 is the first flange, 6 is the head, 7 is the first groove, 8 is the second groove, 9 is the second flange, 10 is the lengthened section, 11 is the accommodating cavity, 12 is the handle, 13 is the chamfer, and 14 is the round corner. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present application more clear and understandable, the following will further describe the present application in combination with specific embodiments.

[0022] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by those skilled in the art to which the present application belongs. The "first", "second" and similar words used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connection" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, which may change accordingly when the absolute position of the described object changes.

[0023] As Figure 1As shown, an outdoor power cable cold shrink terminal includes a main body 1, the inside of the main body 1 is hollow and the two ends are open, so that when the main body 1 is expanded, the support bar can be embedded into the inner wall of the main body 1 through the opening to form a temporary framework for supporting the main body 1, thereby maintaining the expanded state of the main body 1, the terminal also includes two end caps 6, which are detachably mounted at the openings of the main body 1, and the end caps 6 and the main body 1 together form a closed chamber for wrapping and limiting the support bar, and the support bar is completely isolated from the external environment through the closed chamber to prevent external forces from acting on the support bar to cause it to loosen, fall off and shift;

[0024] The above technical scheme can seal and protect the support bar, prevent the pre-expansion structure from failing, and prevent the support bar from loosening or shifting due to external forces. During factory production, the cable outdoor cold shrink terminal material such as silicone rubber is mechanically expanded to the designed size. In the expanded state, the support bar is placed inside the main body 1 in a spiral or segmented manner through the opening, and its rigidity is used to maintain the expanded state. The support bar is usually tightly attached to the inner wall of the terminal material to form a temporary framework. Then, the end cap 6 is mounted on the two end openings of the main body 1, thereby completely locking the support bar inside the cable outdoor cold shrink terminal. When in use, the end cap 6 is detached from the opening of the main body 1. When in use, the main body 1 is sleeved onto the cable and adjusted to the correct position. The pull ring or pull rope at the end of the support bar is pulled to gradually pull out the spiral or segmented support bar from the inside of the main body 1. After the support bar is removed, the main body 1 loses support and relies on its own elasticity to shrink tightly around the cable to form a seal.

[0025] In summary, the utility model adds end caps 6 to the two ends of the existing cable outdoor cold shrink terminal, which can seal the two end openings of the main body 1 using the end caps 6, thereby completely enclosing the support bar inside the cable outdoor cold shrink terminal. The end caps 6 can limit the two ends of the support bar to prevent it from loosening or shifting due to external forces. At the same time, the end caps 6 can also prevent water or foreign matter from entering the inside of the cable outdoor cold shrink terminal through the openings at the two ends of the main body 1. In combination with the existing packaging bag, the stability of the cable outdoor cold shrink terminal during transportation can be further improved.

[0026] As shown in Figure 2 In this embodiment, the end cap 6 includes a top wall and a side wall extending in a direction perpendicular to the top wall at one end of the top wall. The opening of the main body 1 forms a stepped cylinder along the axial length direction, and the end cap 6 is detachably sleeved on the outer surface of the stepped cylinder. Specifically, an upper stepped cylinder 4 is arranged at the top end opening of the main body 1, and a lower stepped cylinder 3 is arranged at the bottom end opening of the main body 1.

[0027] The above technical scheme can sleeve the end cap 6 on the stepped cylinder, thereby realizing the sealing of the support bar in cooperation with the main body 1.

[0028] As shown in Figure 2As shown, in this embodiment, at least one first engaging component is provided on the outer surface of the stepped cylinder, and at least one second engaging component is provided on the inner surface of the side wall of the end cap 6 to cooperate with the first engaging component. The axial movement of the end cap 6 relative to the stepped cylinder is prevented by the mutual cooperation of the first engaging component and the second engaging component. Preferably, the first engaging component or the second engaging component is made of an elastic and easily deformable material, such as rubber.

[0029] The above technical solution enables the end cap 6 to be installed on the stepped cylinder in a snap-fit ​​connection manner. Since the first snap-fit ​​component or the second snap-fit ​​component is made of an elastic and easily deformable material, the end cap 6 will not cause damage to the surface of the stepped cylinder during installation and disassembly.

[0030] like Figure 3 As shown, in this embodiment, the first engaging component is a first flange 5 extending outward along the radial direction of the stepped cylinder, and the second engaging component is a first groove 7 formed on the inner surface of the side wall of the end cap 6. After the end cap 6 is fitted onto the stepped cylinder, the first flange 5 and the first groove 7 engage with each other to lock the end cap 6 and the stepped cylinder in the axial direction. Preferably, the first flange 5 is an annular flange, and the surface of the first flange 5 has a smoothly transitioned arc surface.

[0031] The above technical solution can fix the end cap 6 on the stepped cylinder. When in use, hold the end cap 6 and align it with the stepped cylinder, and put the inner surface of the side wall of the end cap 6 against the outer surface of the stepped cylinder. Apply appropriate axial pressure so that the first flange 5 can deform and be embedded in the first groove 7, thereby fixing the end cap 6 to the stepped cylinder.

[0032] like Figure 3 As shown, in this embodiment, a second groove 8 is also provided on the outer surface of the stepped cylinder. The second groove 8 is adapted to the shape of the second flange 9 provided on the inner surface of the side wall of the end cap 6. The second flange 9 and the first flange 5 form a gap in the axial direction of the main body 1.

[0033] The above technical solution can further improve the connection stability between the end cap 6 and the stepped cylinder. By setting two pairs of flanges and grooves, the fastening force between the end cap 6 and the stepped cylinder can be increased, preventing the end cap 6 from falling off the stepped cylinder due to external force.

[0034] like Figure 2 and Figure 3 As shown, in this embodiment, the end cap 6 extends along the axial direction on its top wall to form an extended section 10, and an accommodating cavity 11 is formed inside the extended section 10 so that the part of the support bar protruding from the stepped cylinder can be housed in the accommodating cavity 11.

[0035] Adopting the technical scheme can conveniently and completely accommodate the support strip, generally, the overall length of the support strip is designed to be greater than the overall length of the cable outdoor cold shrink terminal, so that the support strip protrudes from the stepped cylinder by a distance, and therefore, by additionally arranging the lengthening section 10 on the head 6, the support strip can be perfectly accommodated.

[0036] As shown in Figure 1 and Figure 2 in the embodiment, the head 6 is provided with at least one handle 12 on the outer surface of the side wall thereof, preferably, each head 6 is provided with two handles 12;

[0037] Adopting the technical scheme can conveniently disassemble the head 6, when disassembling, the handle 12 on the surface of the head 6 is gripped to exert an axial force until the flange and the groove are separated, and then the head 6 can be disassembled from the stepped cylinder.

[0038] As shown in Figure 1 and Figure 2 in the embodiment, the main body 1 is provided with a plurality of umbrella skirts 2 on the outer surface thereof and spaced apart along the axial direction thereof;

[0039] Adopting the technical scheme can increase the creepage distance and improve the rain flashover resistance, and the part of the surface is coated with a modified polyurethane coating layer to form a lotus effect and accelerate the sliding of rainwater.

[0040] As shown in Figure 3 in the embodiment, the head 6 is provided with a chamfer 13 at one end close to the main body 1, and the remaining area of the head 6 away from the main body 1 is provided with a round corner 14;

[0041] Adopting the technical scheme can make the head 6 overall relatively smooth and improve the hand feeling.

[0042] Working principle: when produced in the factory, the cable outdoor cold shrink terminal material such as silicone rubber will be mechanically expanded to the designed size, in the expanded state, the support strip is spirally or segmentedly put into the inside of the main body 1 through the opening, and the rigidity thereof is utilized to maintain the expanded state, the support strip is usually closely attached to the inner wall of the terminal material to form a temporary framework, the head 6 is gripped to align the stepped cylinder, and the inner surfaces of the side walls of the two heads 6 are respectively attached to the outer surfaces of the lower stepped cylinder 3 and the upper stepped cylinder 4, and appropriate axial pressure is applied, so that the first flange 5 is deformed and embedded into the first groove 7, and the second flange 9 is deformed and embedded into the second groove 8, thereby fixing and connecting the head 6 with the stepped cylinder, and realizing that the support strip is completely locked in the inside of the cable outdoor cold shrink terminal to prevent external force from causing the support strip to loosen or shift;

[0043] In use, the cap 6 is removed from the stepped barrel by gripping the handle 12 on the surface of the cap 6 and applying an axial force until the flange and groove disengage, the body 1 is then slipped over the cable and adjusted into the correct position, the pull ring or cord at the end of the support strip is pulled and the helical or segmented support strip is progressively withdrawn from within the body 1, once the support strip has been removed the body 1 loses support and retracts under its own resilience to tightly encase the cable and form a seal.

[0044] It should be understood by those of ordinary skill in the art that the above discussion of any of the embodiments is merely exemplary in nature and is not intended to imply limitations with respect to the scope of the present application, including the claims; combinations of features from the above-described embodiments, or from different embodiments, can be made and can be made in any order; and there are many other variations of the different aspects of the present application, which are not expressly mentioned above for the sake of brevity, but which are within the scope of the present application.

[0045] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such alternatives, modifications, equivalents, improvements and the like are intended to be encompassed by the present application.

Claims

1. An outdoor cold shrink termination for power cables comprising a main body (1) which is hollow inside and open at both ends, so that when the main body (1) is expanded, a support bar can be inserted through the openings into the inner wall of the main body (1) to form a temporary skeleton supporting the main body (1) and thereby maintaining the expanded state of the main body (1), characterized in that, The terminal further comprises two end caps (6) which are detachably mounted at the opening of the main body (1) and jointly form a closed chamber for wrapping and supporting the strip, so as to completely isolate the strip from the external environment and prevent external force from acting on the strip to cause loosening, falling and displacement of the strip.

2. Outdoor cold shrink termination of a power cable according to claim 1, characterized in that The end cap (6) comprises a top wall and a side wall extending from one end of the top wall in a direction perpendicular to the top wall.

3. Outdoor cold shrink termination of a power cable according to claim 2, characterized in that The opening of the main body (1) is formed into a stepped cylinder along the axial length direction, and the end cap (6) is detachably sleeved on the outer surface of the stepped cylinder.

4. An outdoor cold shrink termination for power cables according to claim 3, characterized in that The outer surface of the stepped cylinder is provided with at least one first clamping component, and the inner surface of the side wall of the end cap (6) is provided with at least one second clamping component matched with the first clamping component, so as to prevent the axial movement of the end cap (6) relative to the stepped cylinder through the mutual cooperation of the first and second clamping components.

5. Outdoor cold shrink termination of a power cable according to claim 4, characterized in that The first clamping component or the second clamping component is made of an elastic and deformable material.

6. An outdoor cold shrink termination for power cables according to claim 5, characterized in that The first clamping component is a first flange (5) extending outward in the radial direction of the stepped cylinder, and the second clamping component is a first groove (7) formed in the inner surface of the side wall of the end cap (6), so that the first flange (5) and the first groove (7) are clamped with each other after the end cap (6) is sleeved on the stepped cylinder, thereby locking the end cap (6) and the stepped cylinder in the axial direction.

7. Outdoor cold shrink termination of a power cable according to claim 6, characterized in that The outer surface of the stepped cylinder is further provided with a second groove (8) matched in shape with a second flange (9) arranged on the inner surface of the side wall of the end cap (6), and the second flange (9) is spaced apart from the first flange (5) in the axial direction of the main body (1).

8. An outdoor cold shrink termination for power cables according to claim 4, characterized in that, The end cap (6) is further provided with an elongated section (10) extending in the axial direction on the top wall thereof, and an accommodation cavity (11) is formed in the elongated section (10) to accommodate the part of the support strip protruding from the stepped cylinder.

9. An outdoor cold shrink termination for power cables as defined in claim 2, characterized in that The end cap (6) is further provided with at least one handle (12) on the outer surface of the side wall thereof.

10. An outdoor cold shrink termination for power cables according to any of claims 1-9, characterized in that, The main body (1) is further provided with a plurality of umbrella skirts (2) spaced apart in the axial direction on the outer surface thereof.

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