A cable accessory intermediate joint expansion device

Abstract

This utility model discloses a cable accessory intermediate joint expansion device, relating to the field of cable accessory technology. It includes a base plate, a retaining ring fixedly connected to the top of the base plate, a cable accessory cylinder disposed inside the retaining ring, a support frame disposed on one side of the top of the base plate, and positioning rings and connecting rings fixed to the two sides of the top of the support frame, respectively. An expansion assembly is disposed between the positioning rings and the connecting rings. The expansion assembly includes a rotating ring, the interior of which has four guide grooves. The advantages of this utility model are: through the four guide grooves inside the rotating ring, as the rotating ring rotates, the screw expansion cone gradually expands in the opposite direction, thereby achieving uniform expansion of the cable accessory cylinder in conjunction with the movable support frame. Furthermore, the support frame, in conjunction with the screw, allows adjustment of the distance between the expansion cone and the cable accessory cylinder, facilitating adjustment of the expansion depth as needed.

Description

Technical Field

[0001] This utility model relates to the field of cable accessory technology, and in particular to a cable accessory intermediate joint expansion device. Background Technology

[0002] The cable accessory intermediate joint expansion device is an auxiliary tool designed specifically for the installation process of power cable intermediate joints (a core accessory used to connect two cable sections). It is used to temporarily expand the insulating sleeve of the intermediate joint, creating operating space for the insertion and connection of key components such as cable cores and shielding layers.

[0003] In current cable accessory joint installation, traditional hole-expanding operations still largely rely on manual labor. Common methods involve workers manually pulling on the joint's insulating sleeve or using simple tools like crowbars and shovels to forcibly pry open the sleeve gap. This primitive operating mode has significant drawbacks: Firstly, manual force application makes it difficult to precisely control the force and direction, easily leading to localized overload on the insulating sleeve, causing deformation, wrinkles, or even cracks, damaging the cable's insulation performance and creating safety hazards such as short circuits and breakdowns for subsequent power transmission. Secondly, the hard contact between simple tools and the inner wall of the sleeve lacks a protective mechanism, easily scratching the inner structure of the sleeve, further reducing the joint's sealing and insulation reliability. Furthermore, manual expansion is inefficient, especially for large-size joints in medium and high-voltage cables, often requiring multiple workers and taking tens of minutes. This not only increases labor costs but also extends the overall construction period for cable laying or fault repair, failing to meet the high standards of efficiency and quality required in modern power engineering. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] An expansion device for a cable accessory intermediate joint includes a base plate, a retaining ring fixedly connected to the top of the base plate, a cable accessory cylinder disposed inside the retaining ring, a support frame disposed on one side of the top of the base plate, a positioning ring and a connecting ring fixed on both sides of the top of the support frame, and an expansion component disposed between the positioning ring and the connecting ring.

[0007] The expansion assembly includes a rotating ring with four guide grooves inside and four expansion cones on one side of the rotating ring.

[0008] As a preferred embodiment of the cable accessory intermediate joint expansion device of this utility model, an extension plate is fixedly connected to one side of the expansion cone, and a limiting rod that slides inside the guide groove is fixedly connected to one side of the extension plate.

[0009] As a preferred embodiment of the cable accessory intermediate joint expansion device of this utility model, wherein: an L-shaped plate is fixedly connected to one side of the extension plate, and a retaining rod that slides inside the positioning ring is fixedly connected to one side of the L-shaped plate.

[0010] In a preferred embodiment of the cable accessory intermediate joint expansion device of this utility model, a spring is fixedly connected between one side of the L-shaped plate and the inner wall of the positioning ring, and a limit ring is fixedly connected to one end of the retaining rod.

[0011] As a preferred embodiment of the cable accessory intermediate joint expansion device of this utility model, wherein: a scale is fixedly connected to one side of one of the extension plates, and a pointer is fixedly connected to one side of the positioning ring.

[0012] As a preferred embodiment of the cable accessory intermediate joint expansion device of this utility model, a guide ring is fixedly connected to one side of the rotating ring, and a sliding groove for use with the guide ring is opened inside the connecting ring.

[0013] As a preferred embodiment of the cable accessory intermediate joint expansion device of this utility model, the expansion assembly further includes a motor fixed on one side of the connecting ring, the output end of the motor is fixedly connected to a gear, and the surface of the rotating ring is fixedly connected to a toothed block.

[0014] As a preferred embodiment of the cable accessory intermediate joint expansion device of this utility model, the support frame is internally threaded with a screw rod, one end of the screw rod is rotatably connected to a retaining ring via a bearing, one side of the screw rod surface is rotatably connected to a support plate fixed to the base plate, and one end of the screw rod is fixedly connected to a turntable.

[0015] In a preferred embodiment of the cable accessory intermediate joint expansion device of this utility model, a sliding rod is fixedly connected between one side of the support plate and the retaining ring, and the two sides inside the support frame are slidably connected to the surface of the sliding rod.

[0016] In a preferred embodiment of the cable accessory intermediate joint expansion device of this utility model, a hydraulic cylinder is fixedly connected to the top of the retaining ring, and the piston end of the hydraulic cylinder penetrates into the interior of the retaining ring and is fixedly connected to a rubber ring.

[0017] The beneficial effects of this utility model are as follows: through the four guide grooves set inside the rotating ring, as the rotating ring rotates, the screw expansion cone will gradually expand outward. With the help of the movable support frame, the cable accessory cylinder can be uniformly expanded. However, the support frame and screw can adjust the distance between the expansion cone and the cable accessory cylinder so as to adjust the depth of the hole as needed. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0019] Figure 1 This is an overall structural diagram of the cable accessory intermediate joint expansion device.

[0020] Figure 2 Another perspective view of the overall structure of the cable accessory intermediate joint expansion device.

[0021] Figure 3 This is a diagram showing the unfolded structure of the connecting ring of the cable accessory intermediate joint expansion device.

[0022] Figure 4 This is a structural diagram of the expansion assembly of a cable accessory intermediate joint expansion device.

[0023] The following are the labeling elements in the diagram: 1. Base plate; 2. Retaining ring; 3. Cable accessory cylinder; 4. Support frame; 5. Positioning ring; 6. Connecting ring; 7. Rubber ring; 8. Expansion assembly; 801. Rotating ring; 802. Guide groove; 803. Expansion cone; 804. Extension plate; 805. Limiting rod; 806. L-shaped plate; 807. Retaining rod; 808. Spring; 809. Scale; 810. Pointer; 811. Guide ring; 812. Slide groove; 813. Motor; 814. Gear; 815. Gear block; 816. Limiting ring; 9. Screw; 10. Support plate; 11. Turntable; 12. Slide rod; 13. Hydraulic cylinder. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0027] Example 1:

[0028] Reference Figures 1-4 This is the first embodiment of the present utility model. This embodiment provides a cable accessory intermediate joint expansion device, including a base plate 1, a retaining ring 2 fixedly connected to the top of the base plate 1, a cable accessory cylinder 3 disposed inside the retaining ring 2, a support frame 4 disposed on one side of the top of the base plate 1, a positioning ring 5 and a connecting ring 6 fixed on both sides of the top of the support frame 4 respectively, and an expansion component 8 disposed between the positioning ring 5 and the connecting ring 6.

[0029] The fixing ring 2 fixed to the top of the base plate 1 facilitates the subsequent positioning of the cable accessory cylinder 3, while the support frame 4 provides support for the positioning ring 5 and the connecting ring 6. The support frame 4 is a movable design to facilitate subsequent adjustment of the expansion depth. The positioning ring 5 and the connecting ring 6 can limit the installation of the expansion component 8, which is used to uniformly limit the expansion of the cable accessory cylinder 3.

[0030] The expansion assembly 8 includes a rotating ring 801, which has four guide grooves 802 inside and four expansion cones 803 on one side.

[0031] The four oblique guide grooves 802 inside the rotating ring 801 facilitate the subsequent positioning and movement of the expansion cone 803 in the opposite direction, thereby achieving the expansion effect.

[0032] Example 2:

[0033] Reference Figures 3-4 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0034] Specifically, an extension plate 804 is fixedly connected to one side of the expansion cone 803, and a limiting rod 805 that slides inside the guide groove 802 is fixedly connected to one side of the extension plate 804.

[0035] The extension plate 804 is fixed inside the expansion cone 803 and works with the limiting rod 805 to fit the guide groove 802. As the rotating ring 801 rotates, the sliding pressure between the guide groove 802 and the limiting rod 805 allows the expansion cone 803 to unfold. The expansion cone 803 is made of nylon, which reduces damage to the cable.

[0036] Specifically, an L-shaped plate 806 is fixedly connected to one side of the extension plate 804, and a retaining rod 807 that slides inside the positioning ring 5 is fixedly connected to one side of the L-shaped plate 806.

[0037] By fixing the L-shaped plate 806 to one side of the extension plate 804 and slidingly connecting it with the positioning rod 807 inside the positioning ring 5, the linear movement of the extension plate 804 can be limited, preventing the expansion cone 803 from deviating during movement.

[0038] Specifically, a spring 808 is fixedly connected between one side of the L-shaped plate 806 and the inner wall of the positioning ring 5, and a limit ring 816 is fixedly connected to one end of the fixing rod 807.

[0039] The spring 808 can assist the L-shaped plate 806 in resetting, while the limiting ring 816 can limit the final stroke of the retaining rod 807, preventing the retaining rod 807 from dislodging from the inside of the positioning ring 5.

[0040] Specifically, a scale 809 is fixedly connected to one side of one of the extension plates 804, and a pointer 810 is fixedly connected to one side of the positioning ring 5.

[0041] The scale 809 is fixed on the extension plate 804. When the expansion cone 803 rises with the extension plate 804, the scale 809 will also move. In conjunction with the positioning ring 5, the pointer 810 is fixed in position so as to know the expansion height of the expansion cone 803.

[0042] Specifically, a guide ring 811 is fixedly connected to one side of the rotating ring 801, and a groove 812 is provided inside the connecting ring 6 to cooperate with the guide ring 811.

[0043] The sliding connection between the guide ring 811 and the slide groove 812 can limit the rotation of the rotating ring 801 and also provide support for the rotating ring 801.

[0044] Example 3:

[0045] Reference Figures 3-4 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0046] Specifically, the expansion assembly 8 also includes a motor 813 fixed to one side of the connecting ring 6, with a gear 814 fixedly connected to the output end of the motor 813, and a toothed block 815 fixedly connected to the surface of the rotating ring 801.

[0047] The motor 813 drives the gear 814 to rotate. The rotation of the gear 814 meshes with the toothed blocks 815 fixed on the surface of the rotating ring 801 in an annular array, causing the rotating ring 801 to rotate. This, in turn, moves the guide limit rod 805 of the guide groove 802 to move in position, ultimately achieving the effect of adjusting the expansion cone 803 to unfold in the opposite direction.

[0048] Specifically, the internal thread of the support frame 4 is connected to a screw 9. One end of the screw 9 is rotatably connected to the retaining ring 2 via a bearing. One side of the surface of the screw 9 is rotatably connected to a support plate 10 fixed to the base plate 1. One end of the screw 9 is fixedly connected to a turntable 11.

[0049] When the user needs to adjust the position and expansion depth between the expansion cone 803 and the cable accessory cylinder 3, the turntable 11 can be rotated to make the screw 9 rotate at one end of the retaining ring 2. At this time, the thread on the surface of the screw 9 will be connected with the internal thread of the support frame 4, thereby moving the support frame 4 to one side for adjustment.

[0050] Specifically, a slide rod 12 is fixedly connected between one side of the support plate 10 and the retaining ring 2, and the two sides inside the support frame 4 are slidably connected to the surface of the slide rod 12.

[0051] The stability of the support plate 10 during movement can be improved by sliding the slide rod 12 into the support frame 4.

[0052] Specifically, a hydraulic cylinder 13 is fixedly connected to the top of the retaining ring 2, and the piston end of the hydraulic cylinder 13 extends into the interior of the retaining ring 2 and is fixedly connected to a rubber ring 7.

[0053] The oil cylinder 13 is fixed to the top of the retaining ring 2, and the piston end can make the rubber ring 7 move up and down inside the retaining ring 2. The rubber ring 7 can increase the friction between the rubber ring and the cable accessory cylinder 3, so that it will not loosen when expanding.

[0054] In use, first place the cable accessory cylinder 3 inside the retaining ring 2. Then, extend and retract the piston end of the hydraulic cylinder 13 to press the rubber ring 7 against the top of the cable accessory cylinder 3 to prevent displacement during expansion. Next, rotate the turntable 11 to rotate the screw 9. At this time, the support frame 4 threaded on the surface of the screw 9 will drive the positioning ring 5 and the connecting ring 6 to move. At this time, the sliding groove 812 inside the connecting ring 6 will restrain the guide ring 811 and the rotating ring 801 to move. After the support frame 4 moves to a certain distance, the expansion cone 803 will also press against one side of the cable accessory cylinder 3. Then, turn on the motor 813 to make the gear 814 mesh. The toothed block 815 on the surface of the rotating ring 801 causes the rotating ring 801 to drive the guide ring 811 to rotate inside the slide groove 812. At this time, the guide groove 802 inside the rotating ring 801 will also press against the limiting rod 805. As the limiting rod 805 is pressed, it will drive the extension plate 804 to open. Through the expansion cone 803, the expansion effect of uniformly expanding the inside of the cable accessory cylinder 3 is achieved. However, when the extension plate 804 moves, it will also drive the slide rod 12 to slide within the fixed ring 2, thereby limiting the movement path of the extension plate 804 and ensuring the stability of the linear motion of the expansion cone 803 during the expansion operation.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An expansion device for cable accessory joints, comprising a base plate (1), characterised in that: A retaining ring (2) is fixedly connected to the top of the base plate (1). A cable accessory cylinder (3) is provided inside the retaining ring (2). A support frame (4) is provided on one side of the top of the base plate (1). A positioning ring (5) and a connecting ring (6) are fixed on both sides of the top of the support frame (4). An expansion component (8) is provided between the positioning ring (5) and the connecting ring (6). The expansion assembly (8) includes a rotating ring (801), the interior of which is provided with four guide grooves (802), and one side of the rotating ring (801) is provided with four expansion cones (803).

2. A cable accessory intermediate joint expansion device according to claim 1, characterised in that: An extension plate (804) is fixedly connected to one side of the expansion cone (803), and a limiting rod (805) that slides inside the guide groove (802) is fixedly connected to one side of the extension plate (804).

3. A cable accessory intermediate joint expansion device according to claim 2, characterised in that: An L-shaped plate (806) is fixedly connected to one side of the extension plate (804), and a retaining rod (807) that slides inside the positioning ring (5) is fixedly connected to one side of the L-shaped plate (806).

4. A cable accessory intermediate joint expansion device according to claim 3, characterised in that: A spring (808) is fixedly connected between one side of the L-shaped plate (806) and the inner wall of the positioning ring (5), and a limit ring (816) is fixedly connected to one end of the fixing rod (807).

5. A cable accessory intermediate joint expansion device according to claim 2, characterised in that: A scale (809) is fixedly connected to one side of one of the extension plates (804), and a pointer (810) is fixedly connected to one side of the positioning ring (5).

6. A cable accessory expansion joint as claimed in claim 1, characterized in that: A guide ring (811) is fixedly connected to one side of the rotating ring (801), and a groove (812) is provided inside the connecting ring (6) to cooperate with the guide ring (811).

7. A cable accessory intermediate joint expansion device according to claim 1, characterised in that: The expansion assembly (8) also includes a motor (813) fixed to one side of the connecting ring (6), the output end of the motor (813) is fixedly connected to a gear (814), and the surface of the rotating ring (801) is fixedly connected to a toothed block (815).

8. A cable accessory intermediate joint expansion device according to claim 1, characterised in that: The internal thread of the support frame (4) is connected to a screw (9). One end of the screw (9) is rotatably connected to the retaining ring (2) through a bearing. A support plate (10) fixed to the base plate (1) is rotatably connected to one side of the surface of the screw (9). A turntable (11) is fixedly connected to one end of the screw (9).

9. A cable accessory intermediate joint expansion device according to claim 8, characterised in that: A sliding rod (12) is fixedly connected between one side of the support plate (10) and the retaining ring (2), and the two sides inside the support frame (4) are slidably connected to the surface of the sliding rod (12).

10. A cable accessory intermediate joint expansion device according to claim 1, characterised in that: A hydraulic cylinder (13) is fixedly connected to the top of the retaining ring (2), and the piston end of the hydraulic cylinder (13) extends into the interior of the retaining ring (2) and is fixedly connected to a rubber ring (7).

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