Cantilever insulator sheath

Abstract

The utility model discloses a cantilever insulator sheath, which comprises an insulator sheath, a fitting sheath, a cantilever sheath and an umbrella skirt, and is characterized in that the insulator sheath, the fitting sheath, the cantilever sheath and the umbrella skirt are sequentially and integrally formed into the sheath; the insulator sheath is internally provided with a first cavity so as to wrap the periphery of the insulator, and the fitting sheath is provided with a first convex cavity communicated with the first cavity so as to wrap the periphery of the connecting fitting between the cantilever and the insulator; the cantilever sheath is provided with a second cavity communicated with the first cavity so as to cover the periphery of the cantilever tube; the umbrella skirt is fixed on the periphery of the cantilever sheath. According to the utility model, the sheath is sleeved on the cantilever insulator structure to cover the original part of the cantilever insulator structure, which is easy to hook, build a bird nest and accumulate sundries, so that the cantilever insulator structure becomes relatively smooth, foreign matters can be prevented from accumulating and remaining at the cantilever structure, and meanwhile, the umbrella skirts play a shielding role to prevent the foreign matters from spreading towards the insulator, so that the service life of the insulator is prolonged. And accumulation and clamping stagnation of foreign matters are further avoided.

Description

Technical Field

[0001] This utility model relates to the field of power insulation protection technology, and more specifically to a sheath for a cantilever insulator. Background Technology

[0002] The cantilever insulator is a type of insulator used in the overhead contact system of electrified railways, and it plays an important role in the overhead contact system support device.

[0003] The cantilever insulator is one of the main components of the contact suspension system in rail transit electrical systems. It is primarily used to suspend or support live conductors, isolating them from the grounding conductor and providing insulation. In urban rail transit contact rail systems, the insulator insulates the contact rail from the structure and provides support and positioning for the contact rail. The insulator can withstand the self-weight of the contact rail and a short-term concentrated load of 150 kg placed on it, as well as the impact load on the contact rail under system short-circuit fault conditions.

[0004] Cantilever insulators are indispensable components in the overhead contact system of electrified railways. They ensure the safe and stable operation of the power system by providing mechanical support and electrical insulation. Therefore, the protection of insulators is particularly important. Currently, the installation effect of existing cantilever insulator protection devices is not ideal, and the protection of the insulator sheds is not thorough, making them prone to slippage.

[0005] Therefore, how to provide a protective device for cantilever insulators that is easy to install and has excellent installation effect is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the present invention provides a protective sleeve for a cantilever insulator, which covers the outer periphery of the cantilever insulator and uses sheds to protect the sheds on the insulator, and the sheds can ensure the installation effect of the protective sleeve.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A cantilever insulator sheath includes an insulator sheath, a hardware sheath, a cantilever sheath, and a shed skirt, wherein the insulator sheath, the hardware sheath, the cantilever sheath, and the shed skirt are integrally formed into a sheath in sequence.

[0009] The insulator sheath has a first cavity to cover the outer periphery of the insulator, and the fitting sheath has a first convex cavity communicating with the first cavity to cover the outer periphery of the fitting connecting the arm and the insulator; the arm sheath has a second cavity communicating with the first cavity to cover the outer periphery of the arm tube; and the umbel skirt is fixed to the outer periphery of the arm sheath.

[0010] The beneficial effects of this utility model are that the protective sleeve is fitted around the outer periphery of the cantilever insulator structure, covering the parts of the cantilever insulator structure that are prone to snagging and accumulating debris, making it relatively smooth and preventing foreign objects from accumulating and remaining at the cantilever structure. The sheds also act as shields, preventing foreign objects from spreading to the insulator, further avoiding the accumulation and jamming of foreign objects. The protective sleeve can be installed on-site, shortening the power outage time for maintenance.

[0011] Preferably, the number of umbrella skirts is one or more. The number of umbrella skirts is selected according to the length of the brace tube. The umbrella skirts can improve the blocking effect of the sheath on the brace and the insulator, ensuring that the insulator is not contaminated by foreign objects.

[0012] Preferably, the sheath has an opening along its axis and on one side opposite to the hardware sheath. The sheath has skirts extending outwards from both sides of the opening, and the two skirts can be interlocked and fastened together. The opening facilitates the installation of the sheath, and the skirts, by interlocking, cover the outer periphery of the cantilever insulator, ensuring that the protective sheath completely encloses the outer wall of the cantilever insulator structure, making installation simple and reliable.

[0013] Preferably, at least two anti-drop holes are provided at both ends of the skirt to install anti-drop protection devices. Cable ties, wire ropes, safety ropes, or other anti-drop protection devices can be threaded through these holes, binding the entire sheath to the cantilever insulator structure. This effectively prevents the sheath from falling off the cantilever insulator structure and thus affecting its protective effect.

[0014] Preferably, the insulator has multiple awnings on its outer periphery, and the insulator sheath has one or more protruding ridges formed by an outwardly recessed end face away from the cantilever sheath along its circumference. Each protruding ridge has a second protruding cavity communicating with the first cavity, and the second protruding cavity is fitted onto at least one of the awnings. By using the protruding ridges to cover at least one awning on the outer periphery of the insulator, the cooperation between the protruding ridges and the awnings restricts the sliding of the protective sheath along the axis of the cantilever insulator structure, ensuring the protective effect of the protective sheath.

[0015] Preferably, a circular or semi-circular shielding plate is fixed to the end face of the insulator sleeve away from the brace sleeve. The radius of the shielding plate is larger than the radius of the sheds on the outer periphery of the insulator, and there is a gap between the shielding plate and the sheds located at the end of the insulator. Besides the method of using a protruding ridge to fit onto the insulator sheds, a shielding plate can also be used to shield the sheds on the insulator. There is a gap between the shielding plate and the sheds of the broken insulator arm, and the size of the shielding plate is larger than the sheds. The shielding plate can prevent freezing rain from spreading to the brace insulator and can also prevent birds from building nests on the insulator.

[0016] Preferably, the insulator sheath has a convex ring recessed outwards at the portion between the shielding plate and the fitting sheath, and the convex ring has a third convex cavity communicating with the first cavity. The convex ring can increase the insulation performance between the cantilever structure and the upper electrical structure, increase the creepage distance of the insulator at the cantilever structure, and ensure that the cantilever structure will not experience electrical accidents such as short circuits, flashovers, or insulator burn-out due to foreign object overlap.

[0017] Preferably, the end of the fitting sleeve furthest from the insulator sleeve is open. This openness facilitates the inspection and maintenance of the connecting bolts between the bracket and the insulator.

[0018] Preferably, the sheath is integrally molded from silicone rubber material through vulcanization.

[0019] Preferably, the inner diameter of the end of the wrist arm sheath near the insulator sheath is larger than the inner diameter of the other end.

[0020] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a protective sleeve for a cantilever insulator. The sleeve is placed over the insulator and cantilever to isolate and protect them. It covers areas of the cantilever insulator structure that are prone to hooking, building bird nests, and accumulating debris, making them relatively smooth. This prevents foreign objects from accumulating and remaining at the cantilever structure. Simultaneously, the shed skirt acts as a shield to prevent foreign objects from spreading to the insulator, further avoiding accumulation and jamming. Furthermore, since the protective sleeve is made of silicone rubber, it covers the outside of the cantilever insulator structure, increasing the insulation performance between the cantilever insulator structure and the overlying electrical structure, and increasing the creepage distance of the insulator at the cantilever insulator structure. This ensures that the cantilever insulator structure will not experience electrical accidents such as short circuits, flashovers, or insulator burn-out due to foreign objects overlapping. In addition, this protective sleeve also has the advantages of convenient installation, good weather resistance, and strong versatility. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 A schematic diagram of the sheath structure provided by this utility model;

[0023] Figure 2 for Figure 1 AA section view in the middle;

[0024] Figure 3A schematic diagram of another form of the sheath provided by this utility model;

[0025] Figure 4 for Figure 3 BB section view in the middle.

[0026] in,

[0027] 1-Insulator sheath; 11-First cavity;

[0028] 2-Wrist and arm sleeve; 21-Second cavity;

[0029] 3- Umbrella skirt;

[0030] 4- Skirt; 41- Anti-drop holes;

[0031] 5-Fit sheath; 51-First convex cavity;

[0032] 6-convex ridge; 61-second convex cavity;

[0033] 7-Protruding edge; 71-Third convex cavity;

[0034] 8-Shielding plate. Detailed Implementation

[0035] 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.

[0036] Example 1:

[0037] See appendix Figure 3 and 4 This utility model discloses a cantilever insulator sleeve, including an insulator sleeve 1, a hardware sleeve 5, a cantilever sleeve 2, and a skirt 3, wherein the insulator sleeve 1, the hardware sleeve 5, the cantilever sleeve 2, and the skirt 3 are integrally formed into a sleeve in sequence;

[0038] The insulator sheath 1 has a first cavity 11 to cover the outer periphery of the insulator, and the fitting sheath 5 has a first convex cavity 51 communicating with the first cavity 11 to cover the outer periphery of the connecting fitting between the arm and the insulator; the arm sheath 2 has a second cavity 21 communicating with the first cavity 11 to cover the outer periphery of the arm tube; the umbel skirt 3 is fixed to the outer periphery of the arm sheath 2.

[0039] To further optimize the above technical solution, the number of umbrella skirts 3 can be one or more. The number of umbrella skirts is selected according to the length of the cantilever tube. If the cantilever tube is short, only one umbrella skirt can be set. As the length of the cantilever tube increases, the number of umbrella skirts should be increased accordingly.

[0040] like Figure 3 and 4 As shown, the sheath is provided by the cantilever sheath, the fitting sheath, and the insulator sheath, which are respectively fitted onto the cantilever tube, the connecting fitting between the cantilever and the insulator, and the insulator. The cantilever sheath can block foreign objects from spreading to the insulator through its outer sheds, and further prevent foreign objects from accumulating and getting stuck.

[0041] To further optimize the above technical solution and improve the installation efficiency of the protective sleeve, the sleeve has an opening along its axis on one side relative to the hardware sleeve 5. Skirts 4 extending outwards from the inner cavity of the sleeve are fixed on both sides of the opening, and the two skirts 4 can be interlocked and fastened together. For example... Figure 3 As shown, the protective sleeve has an open design, and the use of snaps and fixing holes improves the installation efficiency. Simply fasten the snaps during installation; it's convenient, simple, and saves time and labor.

[0042] To further optimize the above technical solution and ensure that the sheath can be firmly installed on the cantilever insulator to prevent it from falling off, at least two anti-fall holes 41 are provided at both ends of the skirt 4 to install anti-fall protection devices. The anti-fall protection devices can be cable ties, binding straps, wire ropes, safety ropes, etc., which are wrapped around the outer circumference of the sheath through the anti-fall holes to secure it to the cantilever insulator structure, effectively preventing the sheath from falling off.

[0043] In this embodiment, the sheath is integrally molded from silicone rubber material through vulcanization. Silicone rubber material has excellent electrical and tracking resistance, excellent weather resistance, high mechanical properties, hydrophobicity and hydrophobic migration characteristics, and extremely excellent high and low temperature resistance, and can be used continuously in conditions of -50℃ to +150℃.

[0044] In this embodiment, the insulator has multiple sheds on its outer periphery. The end face of the insulator sleeve 1 away from the wrist arm sleeve 2 is recessed outward along its circumference to form one or more protrusions 6. The protrusions 6 have a second protrusion 61 that communicates with the first cavity 11. The second protrusion 61 is fitted onto at least one shed.

[0045] By engaging with the umbels on the insulator, the protective sleeve can be restricted from sliding along the axial direction of the cantilever insulator structure, ensuring the protective effect of the sleeve. Simultaneously, the protrusion is fitted onto at least one umbel of the insulator, effectively preventing the spread of freezing rain, bird nesting, and interference from foreign objects, thus ensuring the stable operation of the line.

[0046] In some other embodiments, the end of the fitting sleeve 5 furthest from the bracket sleeve 1 is open. This opening allows observation of the connection status between the bracket and the insulator, facilitating maintenance of the connecting bolts. It also prevents interference between the protective sleeve and the connecting bolts, thus avoiding any impact on the stable operation of the line.

[0047] To further optimize the above technical solution, the inner diameter of the end of the cantilever sleeve 2 closest to the insulator sleeve 1 is larger than the inner diameter of the other end.

[0048] like Figure 4 As shown, the creepage distance can be further increased by increasing the diameter of the insulator sheath near the cantilever sheath.

[0049] Example 2:

[0050] See appendix Figures 1-2 This utility model discloses a cantilever insulator sleeve, including an insulator sleeve 1, a hardware sleeve 5, a cantilever sleeve 2, and a skirt 3, wherein the insulator sleeve 1, the hardware sleeve 5, the cantilever sleeve 2, and the skirt 3 are integrally formed into a sleeve in sequence;

[0051] The insulator sheath 1 has a first cavity 11 to cover the outer periphery of the insulator, and the fitting sheath 5 has a first convex cavity 51 communicating with the first cavity 11 to cover the outer periphery of the connecting fitting between the arm and the insulator; the arm sheath 2 has a second cavity 21 communicating with the first cavity 11 to cover the outer periphery of the arm tube; the umbel skirt 3 is fixed to the outer periphery of the arm sheath 2.

[0052] To further optimize the above technical solution, the number of umbrella skirts 3 can be one or more. The number of umbrella skirts is selected according to the length of the cantilever tube. If the cantilever tube is short, only one umbrella skirt can be set. As the length of the cantilever tube increases, the number of umbrella skirts should be increased accordingly.

[0053] like Figure 1 and 2 As shown, the sheath is provided by the cantilever sheath, the fitting sheath, and the insulator sheath, which are respectively fitted onto the cantilever tube, the connecting fitting between the cantilever and the insulator, and the insulator. The cantilever sheath can block foreign objects from spreading to the insulator through its outer sheds, and further prevent foreign objects from accumulating and getting stuck.

[0054] To further optimize the above technical solution and improve the installation efficiency of the protective sleeve, the sleeve has an opening along its axis on one side relative to the hardware sleeve 5. Skirts 4 extending outwards from the inner cavity of the sleeve are fixed on both sides of the opening, and the two skirts 4 can be interlocked and fastened together. For example... Figure 1 As shown, the protective sleeve has an open design, and the use of snaps and fixing holes improves the installation efficiency. Simply fasten the snaps during installation; it's convenient, simple, and saves time and labor.

[0055] To further optimize the above technical solution and ensure that the sheath can be firmly installed on the cantilever insulator to prevent it from falling off, at least two anti-fall holes 41 are provided at both ends of the skirt 4 to install anti-fall protection devices. The anti-fall protection devices can be cable ties, binding straps, wire ropes, safety ropes, etc., which are wrapped around the outer circumference of the sheath through the anti-fall holes to secure it to the cantilever insulator structure, effectively preventing the sheath from falling off.

[0056] In this embodiment, the sheath is integrally molded from silicone rubber material through vulcanization. Silicone rubber material has excellent electrical and tracking resistance, excellent weather resistance, high mechanical properties, hydrophobicity and hydrophobic migration characteristics, and extremely excellent high and low temperature resistance, and can be used continuously in conditions of -50℃ to +150℃.

[0057] In this embodiment, a circular or semi-circular shielding plate 8 is fixed to one end face of the insulator sleeve 1 away from the arm sleeve 2. The radius of the shielding plate 8 is larger than the radius of the shed on the outer periphery of the insulator, and there is a gap between the shielding plate 8 and the shed located at the end of the insulator.

[0058] The difference between this embodiment and embodiment 1 is that the shielding effect on the insulator is achieved by using a shielding plate. The structural size of the shielding plate is larger than the structural size of the shed on the insulator, and there is a gap between the shielding plate and the shed at the end of the insulator during actual installation. The shielding plate can prevent the spread of foreign objects and the construction of bird nests, and can play a role in bird protection and frost prevention.

[0059] To further optimize the above technical solution, the portion of the insulator sheath 1 between the shielding plate 8 and the hardware sheath 5 is recessed outward to form a convex ring 7, and the convex ring 7 has a third convex cavity 71 that communicates with the first cavity 11.

[0060] The raised edge increases the creepage distance, which can effectively improve the insulation performance of the protective sleeve, avoid surface flashover, ensure the normal operation of the line, reduce the number of maintenance, and reduce economic losses caused by line damage.

[0061] To further optimize the above technical solution, the end of the hardware sleeve 5 furthest from the cantilever sleeve 1 is open. This opening allows observation of the connection status between the cantilever and the insulator, facilitating maintenance of the connecting bolts. It also prevents interference between the protective sleeve and the connecting bolts, thus avoiding any impact on the stable operation of the line.

[0062] This utility model allows for quick and easy on-site installation and disassembly, significantly reducing power outage time during maintenance. It is convenient to install and disassemble, being more flexible and bend-resistant than open plastic pipes, and the operation is easy and convenient, requiring no professional training for operators. It has a longer service life than plastic sheaths, reaching 20-30 years or more, and is resistant to aging and corrosion. It possesses excellent corona resistance, high and low temperature resistance, superior mechanical and electrical insulation properties, low density, good flame retardancy, and is halogen-free and free of heavy metals. It is an upgraded replacement for covering tapes, plastic sheaths, and heat-shrinkable materials, ensuring the safe operation of electrical equipment.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sheath for a cantilever insulator, characterized in that, It includes an insulator sheath (1), a hardware sheath (5), a cantilever sheath (2), and a shed (3), wherein the insulator sheath (1), the hardware sheath (5), the cantilever sheath (2), and the shed (3) are integrally formed into a sheath in sequence; The insulator sheath (1) has a first cavity (11) to cover the outer periphery of the insulator, and the fitting sheath (5) has a first convex cavity (51) communicating with the first cavity (11) to cover the outer periphery of the connecting fitting between the arm and the insulator; the arm sheath (2) has a second cavity (21) communicating with the first cavity (11) to cover the outer periphery of the arm tube; and the umbrella skirt (3) is fixed to the outer periphery of the arm sheath (2).

2. The sheath for a cantilever insulator according to claim 1, characterized in that, The number of the umbrella skirt (3) is one or more.

3. The sheath for a cantilever insulator according to claim 2, characterized in that, The sheath has an opening along its axis and on one side opposite to the hardware sheath (5). The sheath has skirts (4) extending outward from the inner cavity of the sheath on both sides opposite to the opening. The two skirts (4) can be snapped together and fastened.

4. The sheath for a cantilever insulator according to claim 3, characterized in that, At least two anti-fall holes (41) are provided at both ends of the skirt (4) to install anti-fall protection devices.

5. A sheath for a cantilever insulator according to claim 1, characterized in that, The insulator has multiple sheds on its outer periphery. The insulator sheath (1) is recessed outward along its circumference at one end face away from the arm sheath (2) to form one or more protrusions (6). The protrusions (6) have a second protrusion (61) communicating with the first cavity (11). The second protrusion (61) is fitted on at least one of the sheds.

6. The sheath for a cantilever insulator according to claim 1, characterized in that, A circular or semi-circular shielding plate (8) is fixed to one end face of the insulator sheath (1) away from the arm sheath (2). The radius of the shielding plate (8) is greater than the radius of the shed on the outer periphery of the insulator, and there is a gap between the shielding plate (8) and the shed located at the end of the insulator.

7. A sheath for a cantilever insulator according to claim 6, characterized in that, The insulator sheath (1) has a convex ring (7) formed by an outward recess in the portion between the shielding plate (8) and the hardware sheath (5). The convex ring (7) has a third convex cavity (71) that communicates with the first cavity (11).

8. A sheath for a cantilever insulator according to any one of claims 1 to 7, characterized in that, The end of the fitting sleeve (5) away from the insulator sleeve (1) is open.

9. A sheath for a cantilever insulator according to any one of claims 1 to 7, characterized in that, The sheath is made of silicone rubber material through vulcanization and integral molding.

10. A sheath for a cantilever insulator according to any one of claims 1 to 7, characterized in that, The inner diameter of the arm sleeve (2) near the insulator sleeve (1) is larger than the inner diameter of the other end.

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