Composite insulator capable of rapidly replacing core rod

Abstract

The utility model relates to the technical field of insulators, in particular to a composite insulator capable of quickly replacing a core rod, which comprises a first shell, a second shell and the core rod, a plurality of umbrella skirts are arranged on the outer wall of the first shell, a first slot is arranged at the bottom of the first shell, a second slot is arranged at the top of the second shell, and the core rod is positioned in the first slot and the second slot. Two circular slots which are symmetrically distributed left and right are formed in the positions, close to the top end, of the outer wall of the second shell, a connecting sleeve is arranged at the bottom of the outer wall of the first shell, and a locking piece is arranged on the outer wall of the connecting sleeve. According to the composite insulator capable of rapidly replacing the core rod, through the linkage design of the spring and the pull rod of the locking piece, the locking state of the second shell can be rapidly released only by pulling the pull ring outwards, so that the core rod can be directly pulled out and replaced, and compared with the tedious operation of dismounting a rubber sleeve or fastening a bolt in the prior art, the operation is more convenient. According to the composite insulator, the maintenance time is greatly shortened, the maintenance can be completed without a professional tool, and the maintenance efficiency is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of insulator technology, specifically to a composite insulator with a quickly replaceable core rod. Background Technology

[0002] Composite insulators are widely used insulation devices in power systems, primarily for supporting and insulating power conductors to ensure the safe transmission of current. Compared to traditional ceramic insulators, composite insulators are typically made of lightweight composite materials, possessing better mechanical strength and impact resistance, while also exhibiting excellent corrosion and moisture resistance. This allows composite insulators to maintain good insulation performance even under harsh climatic conditions, making them an important component in power transmission and distribution systems. However, a significant problem with traditional composite insulators is that when the insulation performance deteriorates due to aging, wear, or other reasons, the entire insulator often needs to be replaced, a costly and traditional approach.

[0003] Patent CN207718958U discloses a composite insulator with good waterproof performance, including an inner tube. The outer circumference of the inner tube is covered by an insulating umbrella sleeve. A through-hole is provided inside the inner tube, and a core rod is inserted into the through-hole. The length of the core rod is greater than the length of the through-hole. A cylindrical connecting end block is welded to one end of the inner tube. A horizontally arranged second insertion hole is formed on the outer wall of the connecting end block near the inner tube, and the second insertion hole and the through-hole are located on the same horizontal plane. This invention uses a clamping device to attach one end of the outer tube to the inner wall of a slot. Multiple fastening bolts can firmly fix the outer tube in the slot. Because the slot is lateral and the rubber sleeve provides good waterproofing, this new invention has excellent waterproof performance. It avoids the problem of traditional composite insulators where the entire insulator must be replaced when the core rod is worn out, thus reducing the cost of use.

[0004] While existing technology offers the possibility of core rod replacement, its design still has some shortcomings in practical applications. For example, using a rubber sleeve to wrap the connection between the inner and outer tubes to enhance waterproofing results in a tight fit between the rubber sleeve and other components during core rod replacement, making the disassembly and replacement process relatively difficult. Furthermore, the rubber sleeve, exposed to air, is susceptible to corrosion from ultraviolet radiation and oxidation, affecting the sealing effect and leading to a decrease in waterproofing performance. These defects limit the convenience of existing technology in practical maintenance. In view of the above problems, we propose a composite insulator with a quick-replacement core rod, aiming to improve the convenience of core rod replacement through a more optimized design, meeting the higher requirements of power systems for maintenance efficiency and economy. Utility Model Content

[0005] The purpose of this invention is to provide a composite insulator with a quickly replaceable core rod, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A composite insulator with a quick-replacement core rod includes a first outer shell, a second outer shell, and a core rod. The outer wall of the first outer shell is provided with multiple sheds. A first slot is provided at the bottom of the first outer shell, and a second slot is provided at the top of the second outer shell. The core rod is located in the first slot and the second slot.

[0008] Two circular slots arranged symmetrically on the outer wall of the second housing are provided near the top. A connecting sleeve is provided at the bottom of the outer wall of the first housing. A locking element is provided on the outer wall of the connecting sleeve to fix the position of the second housing and the connecting sleeve, thereby fixing the position of the second housing and the first housing and realizing the installation of the composite insulator.

[0009] The locking component includes two circular covers arranged symmetrically on the left and right. A pull rod is connected inside the circular cover. The opposite ends of the two pull rods pass through the outer wall of the connecting sleeve and are respectively inserted into two circular slots, thereby fixing the position of the second outer shell. The outer wall of the pull rod is provided with a circular slider that is slidably connected to the circular cover. A spring is sleeved on the outer wall of the pull rod at the position inside the circular cover. One end of the spring abuts against the side of the circular slider, and the other end of the spring abuts against the end of the inner wall of the circular cover.

[0010] When the mandrel needs to be replaced, the worker pulls the two levers outwards, causing the ends of the levers to move out of the two circular slots respectively, releasing the lock on the second housing, allowing the second housing to move downwards, thus removing the bottom end of the mandrel from the second slot. Then, the worker pulls the mandrel out of the first slot, inserts the new mandrel into the first slot, and then pulls the two levers outwards again, allowing the second housing to be inserted into the connecting sleeve, and the ends of the two levers to be inserted into the two circular slots respectively, completing the mandrel replacement operation with high efficiency.

[0011] Preferably, the top of the first housing is provided with a cable clamp, which has a "U" shaped structure and is used to connect cables.

[0012] Preferably, the bottom of the second housing is provided with steel feet for fixing it to the bracket.

[0013] Preferably, the end of the pull rod away from the connecting sleeve passes through the inner wall of the circular cover to the outside, and each of the two pull rods has a pull ring at its opposite ends to facilitate the operator to pull the pull rod outward.

[0014] Preferably, a rubber ring is provided at the connection between the pull rod and the circular cover. The outer wall of the rubber ring is bonded to the circular cover, and the outer wall of the pull rod is tightly fitted with the outer wall of the rubber ring to prevent water or dust from entering the circular cover.

[0015] Preferably, the bottom of the first housing is provided with an annular rubber pad, and the top of the mandrel passes through the annular rubber pad.

[0016] Preferably, the top of the annular rubber pad is bonded to the bottom of the first housing, and the bottom of the annular rubber pad abuts against the top of the second housing, ensuring a seal at the joint between the first and second housings.

[0017] Preferably, a circular groove is provided at the bottom of the inner wall of the connecting sleeve, and a sealing rubber sleeve is adhered in the circular groove.

[0018] Preferably, the inner wall of the sealing rubber sleeve is tightly fitted to the outer wall of the second outer shell to ensure the sealing at the connection between the connecting sleeve and the second outer shell.

[0019] Preferably, the inner wall of the sealing rubber sleeve is provided with two positioning vertical strips arranged symmetrically front and back, and the top of the outer wall of the second outer shell is provided with two U-shaped positioning grooves arranged symmetrically front and back. The two positioning vertical strips are respectively located in the two U-shaped positioning grooves, which play a preliminary positioning role for the second outer shell to ensure that the position of the pull rod corresponds to that of the circular slot.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. This composite insulator with a quick-replacement core rod features a spring-and-pull rod linkage design in the locking component. Simply pulling the pull ring outwards quickly releases the locking state of the second outer shell, allowing the core rod to be directly pulled out for replacement. Compared to the cumbersome operation of removing the rubber sleeve or tightening bolts in the prior art, this utility model significantly shortens maintenance time and can be completed without professional tools, thus significantly improving maintenance efficiency.

[0022] 2. This composite insulator with a quick-replacement core rod adopts multi-layer sealing protection. The annular rubber pad at the bottom of the first outer shell fits tightly with the second outer shell to prevent water leakage at the joint. The sealing rubber sleeve inside the connecting sleeve is in close contact with the outer wall of the second outer shell. The double sealing structure effectively isolates moisture and contaminants.

[0023] 3. This composite insulator with quick-change core rod uses a positioning vertical strip on the inner wall of the sealed rubber sleeve to cooperate with the U-shaped positioning groove on the outer wall of the second housing. During installation, it automatically guides the second housing to the correct position, ensuring that the pull rod and the circular slot are quickly aligned. This design simplifies the operation process. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the overall first-view structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the overall exploded structure of this utility model;

[0027] Figure 4 This is a partial cross-sectional structural diagram of the present invention;

[0028] Figure 5 This is a schematic diagram of the second outer shell structure in this utility model;

[0029] Figure 6 This is a schematic diagram of the assembly structure of the connecting sleeve and locking component in this utility model;

[0030] In the diagram: 1. First outer shell; 10. First slot; 2. Second outer shell; 20. Second slot; 21. Circular slot; 22. U-shaped positioning groove; 3. Cable clamp; 4. Steel foot; 5. Core rod; 6. Connecting sleeve; 60. Circular groove; 7. Locking element; 70. Circular cover; 71. Pull rod; 72. Circular slider; 73. Spring; 74. Rubber ring; 75. Pull ring; 8. Annular rubber pad; 9. Sealing rubber sleeve; 90. Positioning vertical bar; 11. Umbrella skirt. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Please see Figures 1-6 This utility model provides a technical solution:

[0034] A composite insulator with a quick-replacement core rod includes a first outer shell 1, a second outer shell 2 and a core rod 5. The outer wall of the first outer shell 1 is provided with multiple sheds 11. The bottom of the first outer shell 1 is provided with a first slot 10. The top of the second outer shell 2 is provided with a second slot 20. The core rod 5 is located in the first slot 10 and the second slot 20.

[0035] Two circular slots 21 arranged symmetrically on the outer wall of the second outer shell 2 are provided near the top. A connecting sleeve 6 is provided at the bottom of the outer wall of the first outer shell 1. A locking member 7 is provided on the outer wall of the connecting sleeve 6 to fix the position of the second outer shell 2 and the connecting sleeve 6, thereby fixing the position of the second outer shell 2 and the first outer shell 1 and realizing the installation of the composite insulator.

[0036] The locking component 7 includes two circular covers 70 arranged symmetrically on the left and right. A pull rod 71 is connected inside the circular cover 70. The opposite ends of the two pull rods 71 ​​pass through the outer wall of the connecting sleeve 6 and are respectively inserted into two circular slots 21, thereby fixing the position of the second outer shell 2. A circular slider 72 is provided on the outer wall of the pull rod 71 and is slidably connected to the circular cover 70. A spring 73 is sleeved on the outer wall of the pull rod 71 and located inside the circular cover 70. One end of the spring 73 abuts against the side of the circular slider 72, and the other end of the spring 73 abuts against the end of the inner wall of the circular cover 70, ensuring that the pull rod 71 can be reset and moved.

[0037] When the core rod 5 needs to be replaced, the worker pulls the two levers 71 outwards, so that the ends of the two levers 71 are removed from the two circular slots 21 respectively, releasing the lock on the second outer shell 2, allowing the second outer shell 2 to move downwards, thereby removing the bottom end of the core rod 5 from the second slot 20. Then the worker pulls the core rod 5 out of the first slot 10, inserts the new core rod 5 into the first slot 10, and then pulls the two levers 71 outwards, so that the second outer shell 2 can be inserted into the connecting sleeve 6, and the ends of the two levers 71 are inserted into the two circular slots 21 respectively, completing the core rod 5 replacement operation with high efficiency.

[0038] In this embodiment, the top of the first outer casing 1 is provided with a cable clamp 3, which has a "U" shaped structure and is used to connect cables.

[0039] Specifically, the bottom of the second outer shell 2 is provided with steel feet 4 for fixing to the bracket.

[0040] Furthermore, the end of the pull rod 71 away from the connecting sleeve 6 passes through the inner wall of the circular cover 70 to the outside. Both opposite ends of the two pull rods 71 ​​are provided with pull rings 75, which facilitates the staff to pull the pull rods 71 ​​outward.

[0041] Furthermore, a rubber ring 74 is provided at the connection between the pull rod 71 and the circular cover 70. The outer wall of the rubber ring 74 is bonded to the circular cover 70, and the outer wall of the pull rod 71 is tightly fitted with the outer wall of the rubber ring 74 to prevent water or dust from entering the circular cover 70.

[0042] Furthermore, the bottom of the first outer casing 1 is provided with an annular rubber pad 8, and the top of the mandrel 5 passes through the annular rubber pad 8.

[0043] Furthermore, the top of the annular rubber pad 8 is bonded to the bottom of the first housing 1, and the bottom of the annular rubber pad 8 abuts against the top of the second housing 2, ensuring the sealing of the joint between the first housing 1 and the second housing 2.

[0044] Furthermore, a circular groove 60 is provided at the bottom of the inner wall of the connecting sleeve 6, and a sealing rubber sleeve 9 is adhered inside the circular groove 60.

[0045] Furthermore, the inner wall of the sealing rubber sleeve 9 fits tightly against the outer wall of the second outer shell 2, ensuring the sealing of the connection between the connecting sleeve 6 and the second outer shell 2.

[0046] Furthermore, the inner wall of the sealing rubber sleeve 9 is provided with two positioning vertical bars 90 arranged symmetrically front and back, and the top of the outer wall of the second outer shell 2 is provided with two U-shaped positioning grooves 22 arranged symmetrically front and back. The two positioning vertical bars 90 are respectively located in the two U-shaped positioning grooves 22, which play a preliminary positioning role for the second outer shell 2 to ensure that the position of the pull rod 71 corresponds to that of the circular slot 21.

[0047] In this embodiment, when the composite insulator with a quick-replaceable core rod needs to be replaced, the operator first holds the two pull rings 75 of the locking member 7 and pulls the pull rod 71 outward, causing the end of the pull rod 71 to exit from the circular slot 21 of the second housing 2, thus releasing the fixation of the second housing 2; then, the second housing 2 is moved downward in the vertical direction, causing the bottom end of the core rod 5 to disengage from the second slot 20, and then the core rod 5 is pulled out from the first slot 10 of the first housing 1. After the old core rod 5 is removed, the new core rod 5 is inserted. Insert the first slot 10, then align the U-shaped positioning groove 22 on the top of the second outer shell 2 with the positioning vertical bar 90 of the sealing rubber sleeve 9 inside the connecting sleeve 6, and push the second outer shell 2 upward so that it enters the circular groove 60 of the connecting sleeve 6. At this time, the inner wall of the sealing rubber sleeve 9 is tightly fitted with the outer wall of the second outer shell 2 to ensure sealing. When the second outer shell 2 rises to the preset position, release the pull ring 75, and the pull rod 71 will automatically reset under the elastic force of the spring 73 and be inserted into the circular slot 21 of the second outer shell 2 to complete the replacement of the core rod 5.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A composite insulator with quick replaceable core rod, comprising a first shell (1), a second shell (2) and a core rod (5), characterized in that: The outer wall of the first shell (1) is provided with a plurality of umbrella skirts (11), the bottom of the first shell (1) is provided with a first slot (10), the top of the second shell (2) is provided with a second slot (20), the core rod (5) is located in the first slot (10) and the second slot (20), the outer wall of the second shell (2) is provided with two circular slots (21) arranged in left and right symmetry near the top end, the bottom of the outer wall of the first shell (1) is provided with a connecting sleeve (6), the outer wall of the connecting sleeve (6) is provided with a locking piece (7), the locking piece (7) comprises two circular cover bodies (70) arranged in left and right symmetry, the circular cover bodies (70) are connected with pull rods (71), the opposite ends of the two pull rods (71) pass through the outer wall of the connecting sleeve (6) and are respectively inserted into the two circular slots (21), the outer wall of the pull rod (71) is provided with a circular sliding block (72) slidingly connected in the circular cover body (70), and the outer wall of the pull rod (71) is provided with a spring (73) sleeved on the position in the circular cover body (70).

2. The composite insulator with quick changeable core rod according to claim 1, characterized in that: The top of the first shell (1) is provided with a wire clamp (3), and the wire clamp (3) is a "U" type structure.

3. The composite insulator with quick changeable core rod according to claim 1, characterized in that: The bottom of the second shell (2) is provided with a steel foot (4).

4. The composite insulator with quick changeable core rod according to claim 1, characterized in that: The end of the pull rod (71) away from the connecting sleeve (6) passes through the inner wall of the circular cover body (70) to the outside, and the opposite ends of the two pull rods (71) are both provided with pull rings (75).

5. The composite insulator with quick changeable core rod according to claim 1, characterized in that: The connecting position of the pull rod (71) and the circular cover body (70) is provided with a rubber ring (74), the outer wall of the rubber ring (74) is bonded with the circular cover body (70), and the outer wall of the pull rod (71) is tightly attached with the outer wall of the rubber ring (74).

6. The composite insulator with quick changeable core rod according to claim 1, characterized in that: The bottom of the first shell (1) is provided with an annular rubber pad (8), and the top end of the core rod (5) passes through the annular rubber pad (8).

7. The composite insulator with quick changeable core rod according to claim 6, characterized in that: The top of the annular rubber pad (8) is bonded to the bottom of the first shell (1), and the bottom of the annular rubber pad (8) abuts against the top of the second shell (2).

8. The composite insulator with quick changeable core rod according to claim 1, characterized in that: The bottom of the inner wall of the connecting sleeve (6) is provided with a circular groove (60), and the circular groove (60) is bonded with a sealing rubber sleeve (9).

9. The composite insulator with quick changeable core rod according to claim 8, characterized in that: The inner wall of the sealing rubber sleeve (9) is tightly attached with the outer wall of the second shell (2).

10. The composite insulator with quick changeable core rod according to claim 8, characterized in that: The inner wall of the sealing rubber sleeve (9) is provided with two positioning vertical bars (90) arranged in front and back symmetry, the top of the outer wall of the second shell (2) is provided with two U-shaped positioning grooves (22) arranged in front and back symmetry, and the two positioning vertical bars (90) are respectively located in the two U-shaped positioning grooves (22).

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