A solid-sealed pole assembly and environmentally friendly switch thereof

Abstract

The present invention is a sealed pole assembly, characterized in that it includes a transverse support and an insulating shell for placing a vacuum tube, the transverse support and the insulating shell are split structures, a placement hole is provided on the transverse support, the insulating shell has a sealed part and a guide part for encapsulating the vacuum tube, a filling gap is provided between the inner wall of the sealed part and the vacuum tube, and the filling gap is filled with insulating material to at least wrap the side of the vacuum tube. The present invention also provides an environmentally friendly switch with a sealed pole assembly. The present invention reserves a filling gap between the vacuum tube and the sealed pole part for filling with epoxy resin, which can improve the insulation performance of the vacuum tube during use, thereby improving stability and reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical manufacturing, and in particular to a sealed pole assembly and an environmentally friendly switch thereof. Background Art

[0002] The ring main unit is a group of electrical transmission and distribution equipment installed in a metal or non-metallic insulating cabinet or made into an assembled interval ring main unit. It usually uses sulfur hexafluoride gas, environmentally friendly gas, or epoxy resin as an insulating medium. In view of the rapidly developing power industry, the use of environmentally friendly gas as an insulating medium will be an important trend in the future development of the switch industry. The advantage of the existing circuit breaker switch used in the environmentally friendly gas cabinet is its maintenance-free feature. The switch adopts a normal pressure sealed box structure, without the threat of gas leakage, and can effectively isolate the pollution of external dirt, dust, and acid mist, ensuring the cleanliness of the operating environment of its busbar, circuit breaker, isolating knife, and grounding knife and their service life, achieving the purpose of maintenance-free, thereby greatly reducing the investment in distribution network operation and maintenance management.

[0003] In the existing sealed pole assembly in the circuit breaker switch, the vacuum tube achieves insulation performance through the sealed pole formed by epoxy resin casting. The function of the sealed pole is to encapsulate the vacuum arc chamber (vacuum tube) as an independent component, and its insulation performance is directly achieved through the sealed pole. However, with the upgrade of the distribution system, the insulation performance of the sealed pole alone can no longer meet the existing needs, and the vacuum tube also has the problem of poor stability in actual use. In addition, in the circuit breaker switch, the existing sealed poles are all integrally formed, but the structure used for the sealed vacuum tube is only a small part. When this part is damaged, it needs to be replaced as a whole, resulting in increased costs. Summary of the invention

[0004] The object of the present invention is to provide a sealed pole assembly and an environmentally friendly switch thereof to solve the above technical problems.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A sealed pole assembly comprises a transverse support and an insulating shell for placing a vacuum tube, wherein the transverse support and the insulating shell are split structures, a placement hole is provided on the transverse support, and the insulating shell comprises a sealed part and a guide part for encapsulating the vacuum tube, a filling gap is provided between the inner wall of the sealed part and the vacuum tube, and the filling gap is filled with insulating material to at least wrap the side surfaces of the vacuum tube.

[0007] The present invention is further provided that a connecting groove is provided on the end surface of the guide portion which is in contact with the transverse bracket, and a connecting column is correspondingly provided on the transverse bracket. A connecting hole is provided in the connecting column, and the connecting hole is concentrically arranged with the connecting groove, and a fastener is provided between the two for connecting the insulating shell and the transverse bracket.

[0008] The present invention further provides that an annular protrusion is provided at the end of the fixed sealing part, one side of the annular protrusion has an opening, an insulating cover is clamped inside the annular protrusion, and one end of the insulating cover fills the opening.

[0009] The present invention is further arranged that the annular protrusion includes a first limiting protrusion, a second limiting protrusion and a third limiting protrusion, the second limiting protrusion is an arc protrusion, the first limiting protrusion and the third limiting protrusion are connected to the second limiting protrusion and are distributed on both sides of the second limiting protrusion, the first limiting protrusion and the third limiting protrusion are straight protrusions, the insulating cover has a placement cavity, the insulating cover includes an arc-shaped end, a side plate portion and a straight end portion, the arc-shaped end portion is adapted to the second limiting protrusion, and the side plate portion is shaped A side groove is formed, parts of the first limiting protrusion and the third limiting protrusion are located in the side groove, the lower end surface of the side groove abuts against the upper end surface of the first limiting protrusion and the third limiting protrusion, a limiting plate is formed between the side grooves at the bottom of the insulating cover, a circular opening is formed between the limiting plate and the arc-shaped end, the circular opening is used to adapt to the conductive copper sleeve of the vacuum tube, the conductive copper sleeve is provided with a contact, the fixing part of the contact is arranged in the placement cavity of the insulating cover, and is connected to the conductive copper sleeve through a fastener.

[0010] The present invention further provides that the insulating cover wraps the side surface of the contact fixing portion.

[0011] The present invention further provides an environmental protection switch, comprising the sealed pole assembly, wherein the environmental protection switch is an upper isolating circuit breaker or a lower isolating circuit breaker.

[0012] The present invention is further arranged that, when the environmental protection switch is an upper isolating circuit breaker, it also includes a crank arm assembly, the crank arm assembly includes a main shaft and an A-frame arranged on the main shaft, mounting arms are arranged on both sides of the A-frame, an opening is formed on the mounting arm, a docking hole is formed in the corresponding guide part, the A-frame is fixed to the guide part by a fastener between the opening and the docking hole, and the contact is a moving contact.

[0013] The present invention is further arranged that, when the environmental protection switch is an upper isolating circuit breaker, it also includes a bracket side plate, an isolating cross frame arranged between the bracket side plates, and a moving knife main shaft arranged between the bracket side plates, the sealed pole assembly is arranged between the bracket side plates, the crank arm assembly is linked with the sealed pole assembly, the moving knife main shaft is located between the isolating cross frame and the sealed pole assembly, the moving knife main shaft is provided with a moving contact piece, the moving contact piece is conductively connected to the moving contact, the isolating cross frame is provided with a static contact, and the moving contact piece contacts or separates from the static contact during the rotation of the moving knife main shaft.

[0014] The present invention is further arranged that, when the environmental protection switch is a lower isolating circuit breaker, it also includes a crank arm assembly, the crank arm assembly includes a main shaft and an A-frame arranged on the main shaft, mounting arms are arranged on both sides of the A-frame, an opening is formed on the mounting arm, a docking hole is formed in the corresponding guide part, the A-frame is fixed to the guide part by a fastener between the opening and the docking hole, and the contact is a static contact.

[0015] The present invention is further arranged that, when the environmental protection switch is a lower isolating circuit breaker, it also includes a bracket side plate, an isolating cross frame arranged between the bracket side plates, and a moving knife main shaft arranged between the bracket side plates, the sealed pole assembly is arranged between the bracket side plates, the crank arm assembly is linked with the sealed pole assembly, the moving knife main shaft is located between the isolating cross frame and the sealed pole assembly, a moving contact piece is arranged on the moving knife main shaft, an inner contact is arranged on the isolating cross frame, the moving contact piece is conductively connected to the inner contact arranged on the isolating cross frame, and the moving contact piece contacts or separates from the static contact during the rotation of the moving knife main shaft.

[0016] Beneficial effects of the present invention: 1-The sealed pole assembly is a split structure, which is divided into a transverse bracket and an insulating shell. The insulating shell and the transverse bracket are connected by fasteners, which is convenient for assembly and overcomes the need to replace the insulating shell when it is damaged, thereby reducing maintenance costs;

[0017] 2- A filling gap is reserved between the vacuum tube and the sealed pole part for filling with epoxy resin, which can improve the insulation performance of the vacuum tube during use, thereby improving stability and reliability.

[0018] 3-Insulation cover is set to improve the insulation performance of the contact;

[0019] 4- The use of the insulating cover and the annular protrusion ensures that the contacts will not deviate during the opening and closing process, thereby improving the stability of the connection and the service life and product quality of the circuit breaker switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention.

[0022] Figure 2 This is a schematic diagram of the explosion of Example 1 of the present invention.

[0023] Figure 3 It is a side view of embodiment 1 of the present invention.

[0024] Figure 4 for Figure 3 Cross-sectional view at AA in the middle.

[0025] Figure 5 It is a schematic structural diagram of the insulating cover matched with the moving contact in Example 1 of the present invention.

[0026] Figure 6 This is a schematic diagram of the structure of Example 2 of the present invention.

[0027] Figure 7 It is a side view of embodiment 2 of the present invention.

[0028] Figure 8 for Figure 7 Cross-sectional view at the middle BB.

[0029] Fig. 9 This is a schematic diagram of the structure of Example 3 of the present invention.

[0030] Fig.10 It is a side view of embodiment 3 of the present invention.

[0031] Fig.11 for Fig.10 Cross-sectional view at CC.

[0032] Fig.12 The figure is a schematic diagram of the structure of the insulating cover matched with the static contact according to the embodiment of the present invention.

[0033] Reference numerals: 10, sealed pole assembly; 101, horizontal bracket; 1011, placement hole; 1012, connecting column; 10121, connecting hole; 102, insulating shell; 1021, sealed part; 1022, guide part; 10221, connecting groove; 10222, docking hole; 20, embedded part; 201, adjusting nut; 30, annular protrusion; 301, first limiting protrusion; 302, second limiting protrusion; 303, third limiting protrusion; 40, insulating cover; 401, placing Cavity; 402, arc-shaped end; 403, side plate; 4031, side groove; 404, straight end; 405, limit plate; 406, circular opening; 50, conductive copper sleeve; 60, moving contact; 70, static contact; 80, contact fixing part; 90, crank arm assembly; 901, main shaft; 902, herringbone; 9021, mounting arm; 90211, opening; 100, bracket side plate; 110, isolation cross frame; 120, moving knife main shaft; 1201, moving contact piece; 130, inner contact. DETAILED DESCRIPTION

[0034] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Example

[0035] like Figure 1-Figure 5 As shown, this embodiment provides a sealed pole assembly 10, including a transverse support 101 and an insulating shell 102 for placing a vacuum tube, the transverse support 101 and the insulating shell 102 are split structures, the transverse support 101 is provided with a placement hole 1011, the insulating shell 102 has a sealed portion 1021 and a guide portion 1022 for encapsulating the vacuum tube, and a filling gap is provided between the inner wall of the sealed portion 1021 and the vacuum tube, and the filling gap is filled with an insulating material to at least wrap the side of the vacuum tube. The insulating material is an epoxy resin layer.

[0036] In this embodiment, the transverse bracket 101 and the insulating shell 102 are split structures, while in the existing structure, the transverse bracket 101 and the insulating shell 102 are integrally formed. The technical solution is as follows:

[0037] A connecting groove 10221 is provided on the end surface of the guide part 1022 which is in contact with the transverse bracket 101, and a connecting column 1012 is correspondingly provided on the transverse bracket 101, and a connecting hole 10121 is provided in the connecting column 1012, and the connecting hole 10121 is concentrically arranged with the connecting groove 10221, and a fastener is provided between the two for connecting the insulating shell 102 and the transverse bracket 101, wherein an embedded component 20 is provided in the connecting groove 10221, and an internal thread is provided in the embedded component 20, and an internal thread is also provided in the connecting hole 10121, and the fastener is fastened by screws or bolts or other methods; in addition, one or more adjusting nuts 201 are provided on the outside of the embedded component 20. In this embodiment, the embedded component 20 can be supported by an elastic plastic structure, and the adjusting nut 201 can adjust the inner diameter of the embedded component 20, thereby increasing the stability and reliability during connection.

[0038] In addition, in the existing circuit breaker switch, the position of the sealed pole assembly 10 and the contact connected thereto may deviate during opening and closing, thereby causing the stability of the connection to deteriorate. Based on the above problem, this embodiment adopts the following means for improvement:

[0039] The end of the fixed seal portion 1021 is provided with an annular protrusion 30, one side of which has an opening, and an insulating cover 40 is clamped inside the annular protrusion 30, and one end of the insulating cover 40 fills the opening. The annular protrusion 30 limits the contact in three directions, and the insulating cover 40 is provided to limit the opening side, wherein the insulating cover 40 is made of insulating material, such as plastic; the annular protrusion 30 and the insulating cover 40 are used in combination to limit the contact around, thereby ensuring the stability of the contact position and preventing deviation. The insulating cover 40 also has the effect of improving the insulation performance.

[0040] Specifically, the annular protrusion 30 includes a first limiting protrusion 301, a second limiting protrusion 302 and a third limiting protrusion 303, the second limiting protrusion 302 is an arc protrusion, the first limiting protrusion 301 and the third limiting protrusion 303 are connected to the second limiting protrusion 302 and are distributed on both sides of the second limiting protrusion 302, the first limiting protrusion 301 and the third limiting protrusion 303 are linear protrusions, the insulating cover 40 has a placement cavity 401, the insulating cover 40 includes an arc end 402, a side plate portion 403 and a straight end 404, the arc end 402 is adapted to the second limiting protrusion 302, and a side groove 4031 is formed on the side plate portion 403, Parts of the first limiting protrusion 301 and the third limiting protrusion 303 are located in the side groove 4031, and the lower end surface of the side groove 4031 abuts against the upper end surfaces of the first limiting protrusion 301 and the third limiting protrusion 303. A limiting plate 405 is formed between the side grooves 4031 at the bottom of the insulating cover 40, and a circular opening 406 is formed between the limiting plate 405 and the arc-shaped end 402. The circular opening 406 is used to adapt to the conductive copper sleeve 50 of the vacuum tube. The conductive copper sleeve 50 is provided with a contact, and the fixing part of the contact is arranged in the placement cavity 401 of the insulating cover 40. The insulating cover 40 wraps the side of the contact fixing part 80 and is connected to the conductive copper sleeve 50 through a fastener.

[0041] The connection between the insulating groove and the annular boss is achieved by the side groove 4031 cooperating with the first limiting protrusion 301 and the third limiting protrusion 303 to achieve fixation. No fasteners are required to achieve fixed connection between the two, and assembly is convenient. Example

[0042] refer to Figure 6-Figure 8 The present invention further provides an environmentally friendly switch, comprising the sealed pole assembly 10, wherein the environmentally friendly switch is an upper isolating circuit breaker.

[0043] When the environmental switch is an upper isolating circuit breaker, it also includes a crank arm assembly 90, which includes a main shaft 901 and a herringbone frame 902 arranged on the main shaft 901, and mounting arms 9021 are arranged on both sides of the herringbone frame 902. An opening 90211 is formed on the mounting arm 9021, and a docking hole 10222 is formed in the corresponding guide part 1022. The herringbone frame 902 is fixed to the guide part 1022 between the opening 90211 and the docking hole 10222 by fasteners, wherein the contact is a moving contact 60. In the upper isolating circuit breaker, the moving contact 60 is arranged on the sealed pole, so in this embodiment, the insulating cover 40 wraps the side of the moving contact 60.

[0044] In this embodiment, it also includes a bracket side plate 100, an isolating cross frame 110 arranged between the bracket side plates 100, and a moving knife spindle 120 arranged between the bracket side plates 100. The sealed pole assembly 10 is arranged between the bracket side plates 100, and the crank arm assembly 90 is linked with the sealed pole assembly 10. The moving knife spindle 120 is located between the isolating cross frame 110 and the sealed pole assembly 10. A moving contact piece 1201 is arranged on the moving knife spindle 120, and the moving contact piece 1201 is conductively connected to the moving contact 60. A static contact 70 is arranged on the isolating cross frame 110. During the rotation of the moving knife spindle 120, the moving contact piece 1201 contacts or separates from the static contact 70, wherein an insulating cover is also arranged at the static contact 70, and its structure is similar to the shape of the insulating cover at the moving contact 60, except that the height of the straight end 404 is greater than the insulating cover at the moving contact 60. Example

[0045] refer to Figure 9-11 This embodiment provides an environmental protection switch, including the sealed pole assembly 10, and the environmental protection switch is a lower isolating circuit breaker.

[0046] When the environmental switch is a lower isolating circuit breaker, it also includes a crank arm assembly 90, which includes a main shaft 901 and a herringbone frame 902 arranged on the main shaft 901, and mounting arms 9021 are arranged on both sides of the herringbone frame 902, and an opening 90211 is opened on the mounting arm 9021, and a docking hole 10222 is formed in the corresponding guide part 1022, and the herringbone frame 902 is fixed to the guide part 1022 by a fastener between the opening 90211 and the docking hole 10222, and the contact is a static contact 70, that is, on the lower isolating circuit breaker, the static contact 70 is located at the sealed pole, and an insulating cover 40 is correspondingly arranged, and its structure is consistent with the insulating cover 40 at the static contact 70 in the upper isolating circuit breaker, and the adaptation structure with the annular protrusion 30 is consistent with that in the upper isolating circuit breaker, which will not be described in detail here, and the specific structure is referenced. Fig.12 .

[0047] When the environmental protection switch is a lower isolating circuit breaker, it also includes a bracket side plate 100, an isolating cross frame 110 arranged between the bracket side plates 100, and a moving knife spindle 120 arranged between the bracket side plates 100. The sealed pole assembly 10 is arranged between the bracket side plates 100, and the crank arm assembly 90 is linked with the sealed pole assembly 10. The moving knife spindle 120 is located between the isolating cross frame 110 and the sealed pole assembly 10. A moving contact piece 1201 is arranged on the moving knife spindle 120, and an inner contact 130 is arranged on the isolating cross frame 110. The moving contact piece 1201 is conductively connected to the inner contact 130 arranged on the isolating cross frame 110. During the rotation of the moving knife spindle 120, the moving contact piece 1201 contacts or separates from the static contact 70.

[0048] The solid-sealed pole assembly 10 in the present invention is a split structure, which is divided into a horizontal bracket 101 and an insulating shell 102. The insulating shell 102 is connected to the horizontal bracket by fasteners, which is easy to assemble and overcomes the need to replace the insulating shell 102 when it is partially damaged, thereby reducing maintenance costs; secondly, a filling gap is reserved between the vacuum tube and the solid-sealed pole part for filling with epoxy resin, which can improve the insulation performance of the vacuum tube during use, thereby improving stability and reliability. At the same time, an insulating cover 40 is provided to improve the insulation performance of the contact; in another aspect: the use of the insulating cover 40 and the annular protrusion 30 ensures that the contact will not be offset during the opening and closing process, thereby improving the stability of the connection and the service life and product quality of the circuit breaker switch.

[0049] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0050] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0051] The above description shows and describes several preferred embodiments of the present invention, but as before, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept of this article through the above teachings or the technology or knowledge of the relevant field. And the changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A sealed pole assembly, characterized in that: It comprises a transverse support and an insulating shell for placing a vacuum tube, wherein the transverse support and the insulating shell are split structures, a placement hole is provided on the transverse support, and the insulating shell has a sealing part and a guide part for encapsulating the vacuum tube, a filling gap is provided between the inner wall of the sealing part and the vacuum tube, and the filling gap is filled with insulating material to at least wrap the side of the vacuum tube; an annular protrusion is provided at the end of the sealing part, one side of the annular protrusion has an opening, an insulating cover is clamped in the annular protrusion, and one end of the insulating cover fills the opening; the annular protrusion comprises a first limiting protrusion, a second limiting protrusion and a third limiting protrusion, the second limiting protrusion is a circular arc protrusion, the first limiting protrusion and the third limiting protrusion are connected to the second limiting protrusion and are distributed in the first limiting protrusion. On both sides of the two limiting protrusions, the first limiting protrusion and the third limiting protrusion are straight protrusions, the insulating cover has a placement cavity, the insulating cover includes an arcuate end, a side plate portion and a straight end, the arcuate end is adapted to the second limiting protrusion, and a side groove is formed on the side plate portion, parts of the first limiting protrusion and the third limiting protrusion are located in the side groove, the lower end surface of the side groove abuts against the upper end surface of the first limiting protrusion and the third limiting protrusion, a limiting plate is formed between the side grooves at the bottom of the insulating cover, a circular opening is formed between the limiting plate and the arcuate end, the circular opening is used to adapt to the conductive copper sleeve of the vacuum tube, the conductive copper sleeve is provided with a contact, the fixing part of the contact is arranged in the placement cavity of the insulating cover, and is connected to the conductive copper sleeve through a fastener.

2. The sealed pole assembly according to claim 1, characterized in that: A connecting groove is provided on the end surface of the guide part that is in contact with the transverse bracket, and a connecting column is correspondingly provided on the transverse bracket. A connecting hole is provided in the connecting column. The connecting hole is concentrically arranged with the connecting groove, and a fastener is provided between the two for connecting the insulating shell and the transverse bracket.

3. The sealed pole assembly according to claim 2, characterized in that: The insulating cover wraps the side surface of the contact fixing portion.

4. An environmentally friendly switch, characterized in that: It comprises the sealed pole assembly as described in any one of claims 1 to 3, wherein the environmental protection switch is an upper isolating circuit breaker or a lower isolating circuit breaker.

5. The environmental switch according to claim 4, characterized in that: When the environmental switch is an upper isolating circuit breaker, it also includes a crank arm assembly, which includes a main shaft and a herringbone frame arranged on the main shaft, mounting arms are arranged on both sides of the herringbone frame, an opening is formed on the mounting arm, and a docking hole is formed in the corresponding guide part, and the herringbone frame is fixed to the guide part by a fastener between the opening and the docking hole, wherein the contact is a moving contact.

6. The environmental switch according to claim 5, characterized in that: When the environmental protection switch is an upper isolating circuit breaker, it also includes a bracket side plate, an isolating cross frame arranged between the bracket side plates, and a moving knife spindle arranged between the bracket side plates. The sealed pole assembly is arranged between the bracket side plates, and the crank arm assembly is linked with the sealed pole assembly. The moving knife spindle is located between the isolating cross frame and the sealed pole assembly. A moving contact piece is arranged on the moving knife spindle, and the moving contact piece is conductively connected to the moving contact. A static contact is arranged on the isolating cross frame. During the rotation of the moving knife spindle, the moving contact piece contacts or separates from the static contact.

7. The environmental switch according to claim 4, characterized in that: When the environmental switch is a lower isolating circuit breaker, it also includes a crank arm assembly, which includes a main shaft and a herringbone frame arranged on the main shaft, mounting arms are arranged on both sides of the herringbone frame, an opening is formed on the mounting arm, and a docking hole is formed in the corresponding guide part, and the herringbone frame is fixed to the guide part by a fastener between the opening and the docking hole, and the contact is a static contact.

8. The environmental switch according to claim 7, characterized in that: When the environmental protection switch is a lower isolating circuit breaker, it also includes a bracket side plate, an isolating cross frame arranged between the bracket side plates, and a moving knife main shaft arranged between the bracket side plates. The sealed pole assembly is arranged between the bracket side plates, and the crank arm assembly is linked with the sealed pole assembly. The moving knife main shaft is located between the isolating cross frame and the sealed pole assembly. A moving contact piece is arranged on the moving knife main shaft, and an inner contact is arranged on the isolating cross frame. The moving contact piece is conductively connected to the inner contact arranged on the isolating cross frame. During the rotation of the moving knife main shaft, the moving contact piece contacts or separates from the static contact.

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