Sliding plugging device for conductor frame and insulating support cylinder of circuit breaker

Abstract

The utility model discloses a sliding plugging device used for a breaker conductor frame and an insulation support cylinder, belonging to the GIS breaker arc extinguish chamber field, the plugging device employs a bent shield, the bent shield comprises a shield body arranged between an insulation pull rod and an insulation support cylinder, the bottom of the shield body is bent upwards to form a bending part, and the bending part is provided with an opening. The tail end of the bending part is fixed with the upper shield of the insulating support cylinder through the shielding end face, the top end of the insulating pull rod is sleeved with the dustproof ring, the dustproof ring can axially slide on the inner surface of the shielding body, and the dustproof ring and the shielding body form axial sealing. It is guaranteed that foreign matter cannot fall into the inner space of the insulating supporting cylinder, discharging is prevented, and therefore the reliability of equipment operation is guaranteed; the device is simple in structure and principle, convenient to disassemble, assemble and use, high in cost performance and good in application and popularization value.

Description

Technical Field

[0001] The utility model belongs to the field of arc extinguishing chambers of GIS circuit breakers, and in particular relates to a sliding blocking device for a conductor frame and an insulating support cylinder of a circuit breaker. Background Art

[0002] The rapid development of the industrial economy requires stable and reliable energy support, and the stability of corporate production and household electricity consumption is of paramount importance. In order to reasonably allocate power resources, UHV products are widely used in long-distance transmission lines to solve energy transportation problems. Gas-insulated metal-enclosed switchgear (GIS) is a vital part of the entire UHV product, playing an important role in protecting other electrical equipment and ensuring stable power transmission. Therefore, higher requirements are placed on the reliability of UHV GIS equipment operation.

[0003] GIS product insulation failure and breakdown accidents have always been the main problem that plagues switch products, especially the insulation breakdown of the arc extinguishing chamber of the UHV GIS circuit breaker, which is a major accident. The inspection and maintenance time when the product has problems has been compressed again and again. According to statistics, the insulation failure and breakdown of GIS products are mostly caused by the introduction of foreign matter and the friction debris generated by the transmission part being carried by the airflow or randomly falling on the parts, causing discharge, such as Figure 1 As shown, GIS circuit breakers are often operated frequently, and the connecting rod transmission part 7 is prone to produce some friction foreign matter during multiple movements. Since the internal space of the insulating support tube 2 and the circuit breaker conductor frame 6 is completely conductive, the foreign matter produced by friction will fall into the interior of the insulating support tube 2, which may cause discharge and lead to insulation failure and breakdown. Utility Model Content

[0004] In order to overcome the above-mentioned technical defects, the utility model provides a sliding sealing device for the conductor frame and the insulating support tube of the circuit breaker, which can solve the technical problem that the transmission part of the arc extinguishing chamber of the existing circuit breaker and the internal space of the insulating support tube lack barrier measures, which makes foreign matter easily fall into the internal space of the insulating support tube, and then causes insulation failure and breakdown.

[0005] In order to achieve the above purpose, the utility model adopts the following technical contents:

[0006] A sliding plugging device for a circuit breaker conductor frame and an insulating support cylinder, comprising a curved shield;

[0007] The bent shield comprises a shield body, the bottom of the shield body is bent upward to form a bent portion, the bent portion is located between the insulating pull rod and the insulating support tube, and the end of the bent portion is formed with a shield end face fixed to the shield on the insulating support tube;

[0008] The top end of the insulating pull rod is sleeved with a dustproof ring, and the dustproof ring and the inner surface of the shielding body are slidably matched to form an axial seal.

[0009] Furthermore, the bending part of the bending portion is arranged in an arc transition.

[0010] Furthermore, the dust ring is sleeved on the rod joint of the insulating rod.

[0011] Furthermore, an annular groove is provided on the circumference of the pull rod joint, and the dust ring is connected to the annular groove in an interference fit manner.

[0012] Furthermore, a plurality of slots are provided on the circumference of the dustproof ring.

[0013] Furthermore, a plurality of the slots are arranged alternately along the upper and lower ends of the dustproof ring.

[0014] Furthermore, the dustproof ring adopts a cylindrical structure, and the diameter of the cylindrical structure is gradually expanded from bottom to top.

[0015] Furthermore, the bending portion is located in the cavity of the insulating support tube.

[0016] Furthermore, the dust ring is made of polytetrafluoroethylene; and the pull rod joint is made of aluminum.

[0017] Furthermore, the shielding end surface and the shielding step surface on the insulating support tube are fixed by bolts.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model provides a sliding plugging device for a circuit breaker conductor frame and an insulating support tube. The plugging device adopts a bent shield, which includes a shielding body located between an insulating pull rod and the insulating support tube. The bottom of the shielding body is bent upward to form a bent portion. The end of the bent portion is fixed to the shield on the insulating support tube through a shielding end face. A dust ring is sleeved on the top end of the insulating pull rod. The dust ring can slide axially on the inner surface of the shielding body. The dust ring and the shielding body form an axial seal. The above design can completely block the circuit breaker conductor frame and the insulating support tube, ensure that foreign matter will not fall into the internal space of the insulating support tube, prevent discharge, and thus ensure the reliability of equipment operation. The device has a simple structure and principle, is easy to disassemble and use, has a high cost performance and good promotion and application value.

[0020] Preferably, in the utility model, the dustproof ring is sleeved on the rod joint of the insulating rod, and the rod joint is provided with an annular groove, which is interference fit with the dustproof ring, thereby ensuring the reliability of the insulating rod driving the dustproof ring to slide.

[0021] Preferably, in the utility model, a plurality of slots are opened on the circumference of the dust ring. The slot arrangement enables the dust ring to have better deformation ability during sliding, prevents blockage when sliding on the inner surface of the curved shield, and does not affect the entire transmission system.

[0022] Preferably, in the utility model, the bending portion is arranged in the cavity of the insulating support tube, which can effectively avoid motion interference with the transmission system inside the conductor frame of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of the connection between the conductor frame and the insulating support cylinder of the existing circuit breaker provided in the embodiment of the utility model;

[0024] Figure 2 A schematic structural diagram of a sliding plugging device for a circuit breaker conductor frame and an insulating support cylinder in an open state provided by an embodiment of the utility model;

[0025] Figure 3 A schematic structural diagram of a sliding sealing device for a circuit breaker conductor frame and an insulating support cylinder in a closed state provided by an embodiment of the utility model;

[0026] Figure 4 A schematic structural diagram of a curved shield of a sliding plugging device for a circuit breaker conductor frame and an insulating support cylinder provided in an embodiment of the utility model;

[0027] Figure 5 A schematic diagram of the structure of the shielding on the insulating support cylinder provided by an embodiment of the utility model;

[0028] Figure 6 A schematic structural diagram of a dustproof ring of a sliding sealing device for a circuit breaker conductor frame and an insulating support cylinder is provided for an embodiment of the utility model;

[0029] Figure 7 A side view of a tie rod joint provided in an embodiment of the utility model.

[0030] Reference numerals:

[0031] Insulating pull rod-1; insulating support tube-2; shield on insulating support tube-3; circuit breaker housing-4; moving contact connecting rod-5; circuit breaker conductor frame-6; connecting rod transmission part-7; insulating pull rod guide-8; bent shield-9; dust ring-10; pull rod joint-11;

[0032] Shielding body-9-1; bending portion-9-2; shielding end surface-9-3. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the following specific embodiments further describe the utility model in detail. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0038] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] The utility model is further described in detail below with reference to the accompanying drawings:

[0041] Example

[0042] In order to better understand the problems in the prior art, the following terms are explained:

[0043] Closing: The mechanism drives the insulating pull rod, the pull rod drives the connecting rod transmission part, and the connecting rod drives the moving contact to move and contact with the static contact.

[0044] Opening: The mechanism drives the insulating pull rod, the pull rod drives the connecting rod transmission part, and the connecting rod drives the moving contact to move and separate from the static contact.

[0045] like Figure 1 As shown, Figure 1 The circuit breaker includes the connecting rod transmission part, the conductor frame, the insulating support tube and other main structures. In this embodiment, it is an 800kV GIS circuit breaker. The circuit breaker is a key component in GIS and is widely used in ultra-high voltage transmission lines.

[0046] Specifically, it is composed of an insulating pull rod 1, an insulating support tube 2, an insulating support tube upper shield 3, a circuit breaker housing 4, a moving contact connecting rod 5, a circuit breaker conductor frame 6, a connecting rod transmission part 7 and an insulating pull rod guide 8 and other components.

[0047] Among them, the bottom of the insulating support tube 2 is installed and fixed on the circuit breaker housing 4, the insulating support tube upper shield 3 is installed on the insulating support tube 2, the circuit breaker conductor frame 6 falls on the insulating support tube upper shield 3, the connecting rod transmission part 7 and the moving contact connecting rod 5 are both installed on the circuit breaker conductor frame 6, and the insulating support tube 2 and the insulating support tube upper shield 3 jointly support and fix the entire arc extinguishing chamber.

[0048] The operating mechanism (not shown in the figure) drives the insulating rod 1 to move axially (i.e. vertically), and the insulating rod guide 8 guides and limits the vertical movement of the insulating rod 1. The insulating rod 1 drives the connecting rod transmission part 7 to convert the vertical movement into horizontal movement, thereby driving the moving contact connecting rod 5 to make the moving contact and the static contact complete contact and separation, thereby opening and closing the switch. Figure 1The left side is the closed position, and the right side is the open position.

[0049] GIS circuit breakers are often operated frequently, and the connecting rod transmission part 7 is prone to produce some friction foreign matter during multiple movements. Since the internal space of the insulating support cylinder 2 and the circuit breaker conductor frame 6 is completely conductive, the foreign matter produced by friction will fall into the inside of the insulating cylinder and easily cause discharge. Therefore, it is urgent to design a solution to isolate the internal space of the insulating support cylinder 2 and the circuit breaker conductor frame 6 to ensure the safe operation of the product.

[0050] It can be seen that the transmission part of the existing circuit breaker arc extinguishing chamber lacks isolation measures from the internal space of the insulating support tube, which makes it easy for foreign matter to fall into the internal space of the insulating support tube, causing insulation failure and breakdown.

[0051] Therefore, in order to solve the above problems, this embodiment provides a sliding sealing device for the circuit breaker conductor frame and the insulating support tube, which can isolate the insulating support tube 2 from the internal space of the circuit breaker conductor frame 6 to ensure the safe operation of the product.

[0052] like Figure 2 and Figure 3 As shown, this embodiment provides a sliding plugging device for a circuit breaker conductor frame and an insulating support cylinder, and the structure is as follows:

[0053] In this embodiment, a step surface and a threaded hole are processed on the upper shield 3 of the insulating support cylinder.

[0054] like Figure 4 and Figure 5 As shown, it includes a bent shield 9, wherein the bent shield 9 is composed of a shield body 9-1, a bending portion 9-2 formed at the bottom of the shield body 9-1, and a shield end face 9-3 located at the bending portion 9-2; wherein the shield end face 9-3 is connected and fixed to the step surface of the shield 3 on the insulating support tube through a threaded hole.

[0055] The bent portion 9-2 of the curved shield 9 extends into the gap between the insulating support tube 2 and the insulating pull rod 1, and the circuit breaker conductor frame 6 and the inner cavity of the insulating support tube 2 are blocked. The curved shield 9 is fixed to the step surface of the shield 3 on the insulating support tube by bolt connection. The curved shield 9-2 is designed with a transition fillet to ensure that the curved portion 9-2 meets the product insulation requirements;

[0056] like Figure 7 As shown, the device is also provided with a dust ring 10 on the insulating pull rod 1, and an annular groove is made at a suitable position of the pull rod joint 11 of the insulating pull rod 1, wherein the dust ring 10 is made of polytetrafluoroethylene material, and the pull rod joint 11 is made of metal aluminum.

[0057] like Figure 6As shown, specifically, the dust ring 10 is designed to be in the shape of a trumpet, that is, a cylindrical structure with a diameter gradually expanding from bottom to top is adopted, and it is installed in the groove position of the tie rod joint 11, and the dust ring 10 is tightly fixed to the groove of the tie rod joint 11 through interference fitting, and the insulating tie rod 1 moves axially, driving the dust ring 10 to slide close to the inner surface of the curved shield 9; here, the dust ring 10 is grooved by staggering the upper and lower parts, that is, a plurality of slots are opened to better produce deformation, which is conducive to axial sliding, and will not cause sliding blockage, and will not affect the entire transmission system.

[0058] Here, the dust ring 10 and the curved shield 9 work together to form an axial seal, thereby achieving a complete seal between the circuit breaker conductor frame 6 and the cavity of the insulating support tube 2 .

[0059] It can be seen that the sliding sealing device for the circuit breaker conductor frame and the insulating support tube provided in this embodiment can effectively isolate the transmission part of the circuit breaker arc extinguishing chamber from the internal space of the insulating support tube, ensuring that friction foreign matter and other foreign matter will not fall into the internal space of the insulating support tube, preventing discharge from occurring, and ensuring the reliability of equipment operation.

[0060] This embodiment has a simple structure and is easy to install and operate.

[0061] This embodiment has low structural cost and high economic efficiency.

[0062] This embodiment achieves complete isolation between the arc extinguishing chamber of the circuit breaker and the internal space of the insulating support tube.

[0063] The dustproof ring of this embodiment has a novel structure and can seal the space without affecting the movement of the pull rod and the overall transmission system.

[0064] The bent portion of the curved shield in this embodiment adopts a reasonable rounded transition design, which not only meets the insulation performance requirements, but also realizes space blocking and sliding guidance of the dust ring through bending.

[0065] In summary, this embodiment provides a sliding plugging device for a circuit breaker conductor frame and an insulating support cylinder, which has the following advantages over the prior art:

[0066] The sealing device adopts a curved shield, which includes a shielding body located between the insulating pull rod and the insulating support tube. The bottom of the shielding body is bent upward to form a bent portion. The end of the bent portion is fixed to the shield on the insulating support tube through the shielding end face, and a dust ring is sleeved on the top of the insulating pull rod. The dust ring can slide axially on the inner surface of the shielding body, and the dust ring and the shielding body form an axial seal. The above design can completely block the conductor frame of the circuit breaker and the insulating support tube, ensuring that foreign matter will not fall into the internal space of the insulating support tube, preventing discharge from occurring, thereby ensuring the reliability of equipment operation; the device has a simple structure and principle, is easy to disassemble and use, has a high cost performance and good promotion and application value.

[0067] The above embodiment is only one of the implementation methods that can realize the technical solution of the utility model. The scope of protection required by the utility model is not limited only to this embodiment, but also includes within the technical scope disclosed by the utility model, any changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field.

Claims

1. A sliding plugging device for a circuit breaker conductor frame and an insulating support cylinder, characterized in that: comprising a curved shield (9); The bent shield (9) comprises a shield body (9-1), the bottom of the shield body (9-1) is bent upward to form a bent portion (9-2), the bent portion (9-2) is located between the insulating pull rod (1) and the insulating support tube (2), and the end of the bent portion (9-2) is formed with a shield end surface (9-3) fixed to the shield (3) on the insulating support tube; The top end of the insulating pull rod (1) is sleeved with a dustproof ring (10), and the dustproof ring (10) and the inner surface of the shielding body (9-1) are slidably matched to form an axial seal.

2. A sliding plugging device for a circuit breaker conductor frame and an insulating support cylinder according to claim 1, characterized in that: The bending part of the bending portion (9-2) is arranged in a circular arc transition.

3. A sliding plugging device for a circuit breaker conductor frame and an insulating support cylinder according to claim 1, characterized in that: The dustproof ring (10) is sleeved on the pull rod joint (11) of the insulating pull rod (1).

4. A sliding sealing device for a circuit breaker conductor frame and an insulating support cylinder according to claim 3, characterized in that: The tie rod joint (11) is provided with an annular groove in the circumferential direction, and the dust ring (10) is connected to the annular groove in an interference fit manner.

5. The sliding plugging device for the conductor frame and insulating support cylinder of a circuit breaker according to claim 1, characterized in that: The dustproof ring (10) is provided with a plurality of slots on its circumference.

6. A sliding plugging device for a circuit breaker conductor frame and an insulating support cylinder according to claim 5, characterized in that: A plurality of slots are arranged in a staggered manner along the upper and lower ends of the dustproof ring (10).

7. A sliding plugging device for a circuit breaker conductor frame and an insulating support cylinder according to claim 1, characterized in that: The dustproof ring (10) adopts a cylindrical structure, and the diameter of the cylindrical structure is gradually expanded from bottom to top.

8. A sliding plugging device for a circuit breaker conductor frame and an insulating support cylinder according to claim 1, characterized in that: The bent portion (9-2) is located in the cavity of the insulating support tube (2).

9. A sliding plugging device for a circuit breaker conductor frame and an insulating support cylinder according to claim 3, characterized in that: The dustproof ring (10) is made of polytetrafluoroethylene; and the pull rod joint (11) is made of aluminum.

10. A sliding plugging device for a circuit breaker conductor frame and an insulating support cylinder according to claim 1, characterized in that: The shielding end surface (9-3) and the step surface of the shielding (3) on the insulating support tube are fixed by bolts.

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