Top housing of switch

Abstract

A top housing of a switch belongs to the technical field of low-voltage apparatuses. Comprising a support and a top cover which are installed in a matched mode in the vertical direction of the switch, the switch comprises at least two arc extinguish chambers, the support is arranged on the air outlet sides of the arc extinguish chambers, the support comprises a partition plate piece, the partition plate piece is located between the adjacent arc extinguish chambers, a first through cavity is formed between the partition plate piece and the top cover, and a second through cavity is formed between the partition plate piece and the top cover. The first through cavity penetrates through the air outlet cavity of the adjacent arc extinguish chamber, and an exhaust hole is formed in at least one side of the support and / or the top cover in the width direction of the corresponding switch. The arc extinguish chamber has the advantages that gas exhausted from the adjacent arc extinguish chambers is isolated from each other in the initial rising process through the partition plate pieces, and front breakdown can be effectively prevented; the whole structure is simple, installation is convenient, and cost is low.

Description

TECHNICAL FIELD

[0001] The utility model belongs to low voltage electric appliance technical field, and specifically relates to a top cover of switch. BACKGROUND

[0002] Air switch, also known as air circuit breaker, is a kind of very important electric appliance in low voltage distribution network, it is accessed to power supply network, and is used to protect the load under it from damage of fault current, but with the development of new energy industry, the use occasion of air switch is more and more, and the voltage requirement of user is continuously improved, and then new design requirement is proposed to the existing air switch.

[0003] Contact system is the core part of air switch, including moving contact and static contact, moving contact is closed or separated with static contact after action, and the conduction or disconnection of switch is realized.Contact system is arranged in the shell of switch, and arc extinguishing chamber is arranged above it.When the circuit is interrupted, the arc generated on the contact system enters the arc extinguishing chamber and is extinguished in the arc extinguishing chamber, which avoids the harm to equipment and personnel.Usually, the gas in the arc extinguishing chamber is discharged to the outside of arc extinguishing chamber, but since the switch contains two or more arc extinguishing chambers, the gas discharged from different arc extinguishing chambers often causes breakdown problem after contacting outside the gas outlet of arc extinguishing chamber.

[0004] In view of the above prior art, it is necessary to improve the arc extinguishing structure of the existing switch, and for this purpose, the applicant has made a beneficial design, and the technical scheme to be introduced below is generated in this background. CONTENT OF UTILITY MODEL

[0005] The utility model aims at providing a top cover of switch, which is simple in structure, convenient to install, can discharge gas from both sides, and can effectively prevent arc gas from entering its inside and causing breakdown again.

[0006] The utility model aims at achieving the following, a top cover of switch, including support and top cover that cooperate and install, the switch includes at least two arc extinguishing chambers, the support is arranged at the gas outlet side of arc extinguishing chamber, the support includes partition element, the partition element is located between adjacent arc extinguishing chambers, and there is first through cavity between the partition element and the top cover, the first through cavity penetrates the gas outlet cavity of adjacent arc extinguishing chambers, and the support and / or top cover form exhaust hole on at least one side in the direction corresponding to the width of switch.

[0007] In one specific embodiment of the utility model, the support further includes base, the base has air hole at the gas outlet of the arc extinguishing chamber, and the gas discharged from the arc extinguishing chamber enters the air hole.

[0008] In another specific embodiment of the utility model, the top cover includes side walls and a top wall, the side walls are formed by the top wall extending downward on both sides in the width direction, and the exhaust holes are formed on the side walls.

[0009] In another specific embodiment of the utility model, the arc extinguishing chambers are three or more than three, the support and / or the top cover are provided with exhaust holes on both sides in the width direction of the switch, the base has second through cavities between the top wall of the top cover and both sides in the width direction of the switch, and the second through cavities are located between the arc extinguishing chambers on the sides and the exhaust holes.

[0010] In another specific embodiment of the utility model, the opening D of the second through cavity is larger than the opening d of the first through cavity.

[0011] In another specific embodiment of the utility model, the opening D is three times larger than the opening d.

[0012] In another specific embodiment of the utility model, the switch further includes a shell, the arc extinguishing chambers are inserted downward from the top opening of the shell, and the support and the arc extinguishing chambers or the shell are provided with sealing pads.

[0013] In another specific embodiment of the utility model, the lower end face of the partition member towards the shell is embedded and installed with the shell through the connecting structure of the convex edge and the groove.

[0014] In another specific embodiment of the utility model, the partition member is provided with an abutting end towards the upper end of the top cover, and the abutting end abuts against the top cover.

[0015] In another specific embodiment of the utility model, the support adopts a split structure, and the number of split parts matches the number of arc extinguishing chambers.

[0016] The utility model adopts the above structure, includes a support and a top cover, the support is formed with a partition member and makes the partition member located between adjacent arc extinguishing chambers, the partition member makes the gas discharged from adjacent arc extinguishing chambers isolated from each other in the initial rising process, and the occurrence of front breakdown can be effectively prevented, the overall structure is simple, and the utility model is convenient to install and low in cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic view of the switch related to the utility model;

[0018] Figure 2 It is an explosion schematic view of the switch related to the utility model;

[0019] Figure 3 Figure 1 is a structure diagram of the upper side of the bracket according to an embodiment of the present application;

[0020] Figure 4 Figure 2 is a structure diagram of the lower side of the bracket according to an embodiment of the present application;

[0021] Figure 5 Figure 3 is a structure diagram of the outer side of the top cover according to an embodiment of the present application;

[0022] Figure 6 Figure 4 is a structure diagram of the inner side of the top cover according to an embodiment of the present application;

[0023] Figure 7 Figure 5 is a structure diagram of the sealing gasket according to an embodiment of the present application;

[0024] Figure 8 Figure 6 is an exploded schematic view of the secondary assembly according to the present application;

[0025] Figure 9 Figure 7 is a sectional view of the present application;

[0026] Figure 10 Figure 8 is a structure diagram of the bracket according to another embodiment of the present application.

[0027] In the figure: 1. top cover, 11. bracket, 111. base, 1111. air hole, 112. partition member, 1121. convex edge, 1122. abutting end, 113. rear wall, 1131. insertion slot, 12. top cover, 121. side wall, 1211. exhaust hole, 122. top wall, 1221. mounting column, 1222. mounting hole, 123. front wall, 1231. positioning cavity, 1232. clamping boss, 124. rear wall, 1241. insertion piece, 13. first through cavity, 14. second through cavity; 2. housing; 3. arc extinguishing chamber; 4. secondary assembly, 41. secondary terminal, 42. fixing frame, 43. baffle, 44. mating cover; 5. face shield; 100 sealing gasket, 101. through hole, 102. mating hole; 200. insulating cap; 300. positioning and mating structure. DETAILED DESCRIPTION

[0028] The specific embodiments of the present application are described in detail below with reference to the accompanying drawings, but the description of the embodiments is not a limitation of the technical solutions, and any form but not substantial changes according to the concept of the present application should be regarded as the protection scope of the present application.

[0029] In the following description, the concepts of up, down, left, right, front and back (or orientation) are directed to the position state of the figure being described, and are intended to facilitate the public's understanding, and therefore cannot be understood as a special limitation on the technical solutions provided by the utility model. Embodiment 1

[0030] As shown in Figure 1 and Figure 2 , the utility model relates to a switch, disconnecting switch and circuit breaker all belong to the category of switch. The switch described in the embodiment includes top cover 1, shell 2 and arc extinguishing chamber 3, the shell 2 is installed with contact system, the arc extinguishing chamber 3 is inserted downwards from the top opening of shell 2 and is located above the contact system. The top cover 1 is arranged at the top of shell 2 and covers the gas outlet of the arc extinguishing chamber 3. In the embodiment, the arc extinguishing chamber 3 is shown as three. But for the present invention, the arc extinguishing chamber 3 should be two or more. The top cover 1 is fastened to the arc extinguishing chamber 3 by screw, of course, can be fastened to the shell 2. The insulating cap 200 is also sleeved on the screw nut. The arc generated when the contact system separates enters the arc extinguishing chamber 3 and is extinguished, and after being extinguished, the gas is discharged from the top of the arc extinguishing chamber 3 and enters the inside of the top cover 1 and is finally discharged to the outside of the switch. The switch also includes secondary connector assembly 4 located in the front side of the top cover 1.

[0031] See Figure 2 Combined Figure 5 , the top cover 1 includes support 11 and top cover 12, the top cover 12 and support 11 are installed in cooperation up and down, the support 11 is placed at the gas outlet side of the arc extinguishing chamber 3, and the top cover 12 is formed with exhaust hole 1211 on both sides in the direction corresponding to the width of the switch.

[0032] Figure 3 And Figure 4 respectively show the structure diagram of the upper and lower end faces of the support 11. In the embodiment, the support 11 is an integral structure, that is, the support 11 is one part. The support 11 includes base 111, partition member 112 and rear blocking wall 113, and the base 111, partition member 112 and rear blocking wall 113 are integrally made. The base 111 has air hole 1111 at the gas outlet of the arc extinguishing chamber 3, and the gas discharged from the arc extinguishing chamber 3 is discharged upwards through the air hole 1111. Of course, the partition member 112 can be arranged on the support 11 or arranged on the top cover 12, and the arrangement relationship is not limited by the word "comprising", which belongs to the protection scope of the present invention.

[0033] The partition member 112 is installed between two adjacent arc extinguishing chambers 3, and is used to separate the gas discharged from the adjacent arc extinguishing chambers 3, i.e. the gas discharged from the adjacent arc extinguishing chambers 3 is separated in the height direction of the partition member 112. The lower end surface of the partition member 112 is embedded and installed with the shell 2 through the cooperation of the protrusion and the groove, thereby improving the air tightness of the installation. In the embodiment, as shown in Figure 4 , the partition member 112 is provided with a protrusion 1121 on the lower end surface, and the protrusion 1121 cooperates with the corresponding groove formed on the shell 2. Of course, the protrusion 1121 can also be located on the shell 2, and the groove is located on the lower end surface of the partition member 112 facing the shell 2. As shown in Figure 3 , the partition member 112 is further provided with an abutting end 1122 on the upper end facing the top cover 12.

[0034] See Figure 3 and Figure 2 , the rear blocking wall 113 is located on the rear side of the support 11 and extends upward from the base 111. The rear blocking wall 113 is located on the side of the support 11 away from the secondary connector assembly 4. The rear blocking wall 113 is formed with a plurality of insertion grooves 1131 along the length direction, or the rear wall 113 is composed of a plurality of parts, and the plurality of parts are arranged at intervals on the rear side of the support 11, and the insertion grooves 1131 are formed between adjacent parts.

[0035] Figure 5 and Figure 6 respectively show the structure of the upper and lower end surfaces of the top cover 12. The top cover 12 includes a side wall 121, a top wall 122, a front wall 123 and a rear wall 124. The top cover 12 is in the shape of a hat and has a hollow interior. The side wall 121 has a pair of side walls extending downward from both sides of the top wall 122 in the width direction. The pair of side walls 121 are provided with the exhaust holes 1211, and the top wall 122, the front wall 123 and the rear wall 124 are not provided with through holes. This structure allows the gas in the interior of the top cover 12 to be discharged only through the exhaust holes 1211 in the side wall 121. Preferably, the pair of side walls 121 are connected to the left and right ends of the front wall 123 and the rear wall 124, and more preferably, the side wall 121, the top wall 122, the front wall 123 and the rear wall 124 are integrally formed.

[0036] See Figure 5Further, the front wall 123 is located at the front side of the switch, i.e. the side close to the secondary assembly 4, and the rear wall 124 is located at the rear side of the switch, i.e. the side away from the secondary assembly 4. The front wall 123 is provided with a positioning recess 1231 matched with the secondary assembly 4, for realizing the positioning relationship between the top cover 12 and the secondary assembly 4. The front wall 123 is further provided with a clamping boss 1232 on the left and right sides of the positioning recess 1231, respectively, which is matched with the secondary assembly 4 for positioning.

[0037] Continuing to see Figure 6 The top wall 121 has a mounting column 1221 extending downward at the inner side, which abuts against the arc-extinguishing chamber 3 or the shell 2. More specifically, the mounting column 1221 is formed with an axially extending mounting hole 1222, into which a screw is inserted from the outside of the top cover 12 and connected with the arc-extinguishing chamber 3 or the shell 2, realizing the mounting and fixing of the top cover 12.

[0038] Further, an insertion piece 1241 is arranged at the inner side of the top wall 121 and / or the inner side of the rear wall 124, which can be connected with at least one of the top wall 122, the rear wall 124 or the mounting column 1221. The insertion piece 1241 is inserted into the slot 1131 of the bracket 11, and when installed in place, the inner wall of the top wall 122 abuts against the abutting end 1122 of the partition member 112.

[0039] Continuing to see Figure 2 and in combination with Figure 9 The top cover 1 is provided with a sealing gasket 100 between the arc-extinguishing chamber 3 or the shell 2, i.e. the sealing gasket 100 can be arranged between the arc-extinguishing chamber 3 and the bracket 11, or between the shell 2 and the bracket 11. In this embodiment, the sealing gasket 100 is arranged between the arc-extinguishing chamber 3 and the bracket 11.

[0040] As Figure 7 shown, in order to ensure good sealing effect, generally, the sealing gasket 100 is made of rubber or other insulating elastic material. The sealing gasket 100 is used to improve the air tightness between the arc-extinguishing chamber 3 and the bracket 11, ensuring that the gas discharged from the arc-extinguishing chamber 3 can enter the vent hole 1111 of the bracket 11, and not leak to the outside from the installation gap between the bracket 11 and the arc-extinguishing chamber 3, preventing the occurrence of breakdown. Preferably, the shape of the sealing gasket 100 matches the top surface of the arc-extinguishing chamber 3.

[0041] Specifically, the sealing gasket 100 is provided with a plurality of through holes 101 in a matrix in the middle, and is provided with a matching hole 102 at both ends of the through hole 101 matrix corresponding to the front and rear sides of the switch. The through hole 101 corresponds to the gas outlet hole on the arc extinguishing chamber 3, and the gas discharged from the top of the arc extinguishing chamber 3 enters the air hole 1111 on the bracket 11 through the through hole 101. The matching hole 102 is used for the installation between components.

[0042] See Figure 8 and in combination Figure 2 , the switch further comprises a secondary assembly 4, which is installed on the front side of the shell 2 and is located on the front side of the top cover 1. The secondary assembly 4 comprises a secondary terminal 41, a fixing frame 42, a baffle 43 and a matching cover 44. The secondary terminal 41 is installed on the fixing frame 42, and the fixing frame 42 is clamped into the clamping boss 1232 and fixed with the shell 2, and the matching cover 44 is installed on the side of the secondary assembly 4 facing the arc extinguishing chamber 3. Specifically, the matching cover 44 is fixed with the fixing frame 42 by screwing.

[0043] Further, continue to see Figure 2 , the shell 2 is provided with a mask 5 on the front side, which covers the operating mechanism, electric operating mechanism, auxiliary switch and controller installed on the front side of the shell 2, preventing the operator from contacting the above-mentioned components during operation, thereby ensuring the personal safety of the operating personnel.

[0044] See Figure 9 When the top cover 1 is installed in place, the partition piece 112 is placed between the adjacent arc extinguishing chambers 3, and the partition piece 112 of the bracket 11 and the top wall 122 of the top cover 12 form a first through cavity 13. The first through cavity 13 penetrates the gas outlet cavities of the adjacent two arc extinguishing chambers 3. The bracket 11 forms a second through cavity 14 between the left and right sides and the top wall 122. Specifically, the second through cavity 14 is formed between the left and right sides of the base 111 and the top wall 122, and is located between the side arc extinguishing chamber 3 and the gas outlet hole 1211. The dashed line in the figure represents the direction of gas flow. The gas flowing out of the middle arc extinguishing chamber 3 can enter the space on both sides through the first through cavity 13 after passing through the partition piece 112, and the gas in the side arc extinguishing chamber 3 enters the space on both sides upwardly and mixes with the gas from the middle, and is discharged from the gas outlet hole 1211 on both sides of the top cover 12 to the outside of the switch. In the above structure, the partition piece 112 is provided, so that the gases discharged from the adjacent arc extinguishing chambers 3 are isolated from each other during the initial rising process, which can ensure that the front breakdown does not occur.

[0045] Preferably, in order to balance the exhaust efficiency between each arc-extinguishing chamber 3, the opening D of the second through cavity 14 is larger than the opening d of the first through cavity 13; more preferably, the opening D is three times larger than the opening d. Embodiment 2

[0046] As Figure 10 , the difference between this embodiment and embodiment 1 is that the bracket 11 is split type, preferably, the number of split parts of the bracket 11 is consistent with the number of arc-extinguishing chambers 3. Of course, two arc-extinguishing chambers 3 can correspond to one split part, or one arc-extinguishing chamber 3 can correspond to two or more split parts. More preferably, the split parts have positioning and matching structure 300. The positioning and matching structure 300 can be mortise and tenon, or plug-in positioning mode. The split structure of the bracket 11 can better reduce the manufacturing cost and difficulty of parts.

[0047] Further, as an equivalent scheme of the present invention, for example: the top cover 12 can be designed to only include the top wall 122, and the side wall 121, the front wall 123 and the rear wall 124 are arranged on the bracket 11; or the top cover 12 includes the top wall 122 and one or two of the side wall 121, the front wall 123 and the rear wall 124, and the others are located on the bracket 11; or at least one of the side wall 121, the front wall 123 and the rear wall 124 is divided into two parts, one part is located on the top cover 12, and the other part is located on the bracket 11; or the top cover 1 is divided into two parts in the front and rear direction of the switch, and the two parts are combined to form the top cover 1. The above-mentioned schemes all belong to the protection scope of the present invention. From the above-mentioned equivalent schemes, according to different embodiments, the exhaust hole 1211 can be located on the bracket 111 and / or the top cover 12, that is, the exhaust hole 1211 is located on both sides of the top cover 1.

[0048] In the above-mentioned embodiments, the arc-extinguishing chamber is three. Of course, when the arc-extinguishing chamber 3 is two, the partition piece 112 is located between the two arc-extinguishing chambers 3, and has the first through cavity 13 with the top cover 12, at this time, the bracket 11 and / or the top cover 12 can only form the exhaust hole 1211 on one side in the corresponding switch width direction. Of course, it is also feasible that the exhaust hole 1211 is formed on both sides.

[0049] When the arc-extinguishing chamber 3 is four, compared with the first implementation, the partition piece 112 should be three, and other specific descriptions can be referred to the first embodiment.

Claims

1. A top housing of a switch comprising a bracket (11) and a top cover (12) which are fitted together, said switch comprising at least two arc extinguishing chambers (3), said bracket (11) being disposed on the side of the arc extinguishing chambers (3) from which gas is emitted, characterized in that: The support (11) comprises a partition member (112) located between adjacent arc extinguishing chambers (3) and having a first through cavity (13) with the top cover (12), the first through cavity (13) penetrating the gas outlet cavity of the adjacent arc extinguishing chambers (3), and the support (11) and / or the top cover (12) is provided with an exhaust hole (1211) on at least one side in the direction corresponding to the width of the switch.

2. A top housing for a switch according to claim 1, characterized in that: The support (11) further comprises a base (111) having an air passage (1111) at the gas outlet of the arc extinguishing chamber (3), and the gas discharged from the arc extinguishing chamber (3) enters the air passage (1111).

3. A top housing for a switch according to claim 2, wherein: The top cover (12) comprises a side wall (121) and a top wall (122), the side wall (121) is formed by a pair of side walls (121) extending downward from both sides of the top wall (122) in the width direction, and the exhaust hole (1211) is formed in the side wall (121).

4. A top housing for a switch according to claim 3, wherein: The arc extinguishing chamber (3) is three or more, the support (11) and / or the top cover (12) is provided with an exhaust hole (1211) on both sides in the direction corresponding to the width of the switch; the base (111) is provided with a second through cavity (14) between the top wall (122) of the top cover (12) on both sides in the direction corresponding to the width of the switch, and the second through cavity (14) is located between the side arc extinguishing chamber (3) and the exhaust hole (1211).

5. A top housing for a switch according to claim 4, wherein: The opening D of the second through cavity (14) is greater than the opening d of the first through cavity (13).

6. A top housing for a switch according to claim 5, wherein: The opening D is three times the opening d.

7. A top housing for a switch according to claim 1, wherein: The switch further comprises a housing (2), and the arc extinguishing chamber (3) is inserted downward from the top opening of the housing (2); the support (11) is provided with a sealing gasket (100) between the arc extinguishing chamber (3) or the housing (2).

8. A top housing for a switch according to claim 7, characterized in that: The lower end surface of the partition member (112) facing the housing (2) is fitted and installed with the housing (2) through a convex edge and groove connection structure.

9. A top housing for a switch according to claim 1, wherein: The partition member (112) is provided with an abutting end (1122) at the upper end facing the top cover (12), and the abutting end (1122) abuts against the top cover (12).

10. A top housing for a switch according to claim 1, wherein: The support (11) adopts a split structure, and the number of split parts matches the number of arc extinguishing chambers (3).

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