Switch with top housing

Abstract

A switch with a top housing belongs to the technical field of low-voltage electric appliances. Comprising a top cover shell, a shell and an arc extinguish chamber, the arc extinguish chamber is located at an opening of the shell, the top cover shell is arranged at the top of the shell and covers an air outlet of the arc extinguish chamber, and a sheet-shaped sealing gasket is clamped between a support of the top cover shell and the arc extinguish chamber. A plurality of through holes are formed in the arc extinguish chamber, convex ribs are arranged on the contact surface of the support and the sealing gasket, the convex ribs are pressed on the sealing gasket, the convex ribs are annular and surround the plurality of through holes in the sealing gasket, and the through holes correspond to the plurality of air outlet holes in the arc extinguish chamber. The utility model has the advantages that the sealing gasket is arranged between the arc extinguish chamber and the top housing and is a sheet body, so that the air tightness between the arc extinguish chamber and the top housing can be fully ensured, the structure is simple, and the installation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to low-voltage electric appliance technical field, concretely relates to a switch with top cover. BACKGROUND

[0002] Air switch, also known as air circuit breaker, is a very important kind of electric appliance in low-voltage distribution network, which is connected to power supply network and used to protect the load from damage of fault current. With the development of new energy industry, the use of air switch is more and more, and the voltage requirement of users is continuously improved, which puts forward new design requirements for the existing air switch.

[0003] The contact system is the core part of the air switch, including a moving contact and a static contact. The moving contact is closed or separated with the static contact after action, so as to realize the conduction or disconnection of the switch. The contact system is arranged in the shell of the switch, and an arc extinguishing chamber is arranged above the contact system. When the circuit is disconnected, the arc generated on the contact system will enter the arc extinguishing chamber and be extinguished in the arc extinguishing chamber, so as to avoid the harm to the equipment and personnel. Usually, the gas in the arc extinguishing chamber is discharged to the outside of the arc extinguishing chamber. However, since the switch includes two or more arc extinguishing chambers, the gas discharged from different arc extinguishing chambers will contact outside the gas outlet of the arc extinguishing chamber, which often causes breakdown. Therefore, in the prior art, a top cover is usually arranged outside the arc extinguishing chamber. However, since the top cover is usually arranged in close contact with the arc extinguishing chamber, it is difficult to seal between the two. The arc gas will overflow from the gap between the two, which is not conducive to the cooperation of the two. SUMMARY

[0004] The utility model aims at providing a switch with a top cover, a sealing pad is arranged between the arc extinguishing chamber and the top cover, the sealing pad is a sheet body, and the air tightness between the two can be fully ensured.

[0005] The utility model aims at providing a switch with a top cover, a sealing pad is arranged between the arc extinguishing chamber and the top cover, the sealing pad is a sheet body, and the air tightness between the two can be fully ensured.

[0006] In one specific embodiment of the utility model, the top cover further includes a top cover, and the top cover and the bracket are installed in cooperation.

[0007] In another specific embodiment of the utility model, the plurality of through holes are arranged in matrix.

[0008] In another specific embodiment of the utility model, the two ends of the through hole matrix are respectively provided with a matching hole in front of and behind the corresponding switch, and the matching hole allows the screw head of the screw on the arc extinguishing chamber.

[0009] In another specific embodiment of the utility model, the both sides of the sealing gasket are provided with a recess, and the recess makes the sealing gasket have the same shape as the arc extinguishing cover of the arc extinguishing chamber.

[0010] In another specific embodiment of the utility model, the sealing gasket is further provided with a screw passing hole, the screw passing hole is used for fixing the screw passing of the top cover, and the screw passes through the screw passing hole and is screwed into the arc extinguishing cover of the arc extinguishing chamber.

[0011] In another specific embodiment of the utility model, the sealing gasket is made of rubber.

[0012] In another specific embodiment of the utility model, the number of the sealing gaskets is consistent with the number of the arc extinguishing chambers, and the two are one-to-one corresponding.

[0013] In another specific embodiment of the utility model, the sealing gasket is adhered to the arc extinguishing cover of the arc extinguishing chamber by glue, and then the top cover is installed.

[0014] In another specific embodiment of the utility model, the bracket is split type, the number of split parts of the bracket is consistent with the number of the sealing gaskets, and the two are one-to-one corresponding.

[0015] The utility model has the beneficial effects due to the adoption of the above structure: the sealing gasket is arranged between the arc extinguishing chamber and the top cover, the sealing gasket is a sheet body, can fully guarantee the air tightness between the two, and the structure is simple and convenient to install. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the three-dimensional schematic view of the switch of the utility model;

[0017] Figure 2 It is the explosion schematic view of the switch of the utility model;

[0018] Figure 3 It is the structure schematic view of the upper side of the bracket related to the utility model;

[0019] Figure 4 It is the structure schematic view of the lower side of the bracket related to the utility model;

[0020] Figure 5 This is a schematic diagram of the outer side of the top cover involved in this utility model;

[0021] Figure 6 This is a schematic diagram of the inner structure of the top cover involved in this utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the sealing gasket involved in this utility model;

[0023] Figure 8 This is an exploded view of the secondary component involved in this utility model;

[0024] Figure 9 This is an overall sectional view of the present invention;

[0025] Figure 10 This is a schematic diagram of another embodiment of the present utility model;

[0026] In the diagram: 1. Top cover, 11. Bracket, 111. Base, 1111. Vent hole, 112. Partition, 1121. Protruding edge, 1122. Abutting end, 113. Rear baffle, 1131. Slot, 114. Rib, 12. Top cover, 121. Side wall, 1211. Exhaust hole, 122. Top wall, 1221. Mounting post, 1222. Mounting hole, 123. Front wall, 1231. Positioning cavity, 1232. 1. Mounting boss; 124. Rear wall; 1241. Insert; 13. First through cavity; 14. Second through cavity; 2. Housing; 3. Arc extinguishing chamber; 4. Secondary assembly; 41. Secondary terminal; 42. Fixing bracket; 43. Baffle; 44. Mating cover; 5. Face shield; 100. Sealing gasket; 101. Through hole; 102. Mating hole; 103. Relief recess; 104. Screw through hole; 200. Insulating cap; 300. Positioning and mating structure. Detailed Implementation

[0027] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of this utility model should be considered within the protection scope of this utility model.

[0028] In the following description, all directional (or orientational) concepts involving up, down, left, right, front, and back refer to the position of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be construed as a special limitation on the technical solution provided by this utility model. Example 1

[0029] like Figure 1 and Figure 2The utility model relates to a switch, disconnecting switch and circuit breaker all belong to the category of switch. The switch of the embodiment includes top cover 1, casing 2 and arc extinguishing chamber 3, the casing 2 is installed with contact system, the arc extinguishing chamber 3 is inserted downwards from the top opening of casing 2 and is located above the contact system. The top cover 1 is arranged at the top of casing 2 and covers the gas outlet of the arc extinguishing chamber 3. In the embodiment, the arc extinguishing chamber 3 shows 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 casing 2. The insulating cap 200 is also sleeved on the screw nut. The arc produced when the contact system separates enters the arc extinguishing chamber 3 and is extinguished, and the gas is discharged from the top of the arc extinguishing chamber 3 after being extinguished 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 at the front side of the top cover 1.

[0030] 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 forms exhaust hole 1211 on both sides in the width direction of the switch.

[0031] Figure 3 And Figure 4 The structure schematic diagrams of upper and lower end faces of the support 11 are shown respectively. In the embodiment, the support 11 is an integral structure, that is, the support 11 is a 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 the top cover 12, and the arrangement relationship is not limited by the word "comprising" and belongs to the protection scope of the present invention.

[0032] After the partition member 112 is installed in place, it is located between two adjacent arc extinguishing chambers 3 and is used for dividing the gas discharged from the adjacent arc extinguishing chambers 3, that is, the gas discharged from the adjacent arc extinguishing chambers 3 is separated in the height direction of the partition member 112. The lower end face of the partition member 112 towards the casing 2 is embedded and installed with the casing 2 through the cooperation structure of convex edge and groove, so that the air tightness of installation of the two is improved. In the embodiment, as shown in the figure, Figure 4As shown, the partition member 112 is provided with a protruding edge 1121 on the lower end surface, which cooperates with the corresponding groove formed on the shell 2. Of course, the protruding edge 1121 can also be located on the shell 2, and the groove is located on the lower end surface of the partition member 112 towards the shell 2. As shown in Figure 3 As shown, the partition member 112 is further provided with an abutting end 1122 on the upper end towards the top cover 12.

[0033] As shown in Figure 3 and in combination with Figure 2 , the rear blocking wall 113 is located on the rear side of the bracket 11 and extends upward from the base 111. The rear blocking wall 113 is located on the side of the bracket 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, which can also be understood as the rear wall 113 being composed of a plurality of parts, which are arranged at intervals on the rear side of the bracket 11, and the insertion grooves 1131 are formed between adjacent two components.

[0034] 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 with a hollow interior. The side wall 121 is a pair of walls extending downward from both sides of the top wall 122 in the width direction. The pair of side walls 121 are provided with 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 inside the top cover 12 to be exhausted only through the exhaust holes 1211 on 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.

[0035] As shown in Figure 5 Further, the front wall 123 is located on the front side of the switch, i.e. close to the secondary assembly 4, and the rear wall 124 is located on the rear side of the switch, i.e. away from the secondary assembly 4. The front wall 123 is provided with a positioning recess 1231 which cooperates with the secondary assembly 4 to achieve 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, which cooperates with the secondary assembly 4 to achieve the positioning effect.

[0036] As shown in Figure 6The top wall 121 has a mounting post 1221 extending downward on the inner side, which abuts against the arc extinguishing chamber 3 or the housing 2. More specifically, the mounting post 1221 has an axially extending mounting hole 1222 formed therein, and a screw is inserted into the mounting hole 1222 from the outside of the top cover 12 and connected with the arc extinguishing chamber 3 or the housing 2, thereby achieving mounting and fixation of the top cover 12.

[0037] Further, an insertion piece 1241 is arranged on 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 post 1221. The insertion piece 1241 is inserted into the slot 1131 on the bracket 11, and when mounted in place, the inner wall of the top wall 122 abuts against the abutting end 1122 of the partition member 112.

[0038] Continuing to see Figure 2 and in combination with Figure 9 , the top cover 1 is arranged with a sealing gasket 100 between the arc extinguishing chamber 3 or the housing 2, that is, the sealing gasket 100 can be arranged between the arc extinguishing chamber 3 and the bracket 11, or between the housing 2 and the bracket 11. In this embodiment, the sealing gasket 100 is arranged between the arc extinguishing chamber 3 and the bracket 11.

[0039] As shown in Figure 7 , in order to ensure good sealing effect, generally, the sealing gasket 100 is made of rubber or other insulating elastic materials. The sealing gasket 100 is used to improve the air tightness between the arc extinguishing chamber 3 and the bracket 11, to ensure that the gas discharged from the arc extinguishing chamber 3 can enter the air vent hole 1111 on the bracket 11, and not leak from the installation gap between the bracket 11 and the arc extinguishing chamber 3 to the outside, thereby preventing breakdown. Preferably, the shape of the sealing gasket 100 matches the top surface of the arc extinguishing chamber 3. The sealing gasket 100 is in the form of a sheet, which is laid on the arc extinguishing cover of the arc extinguishing chamber 3.

[0040] Specifically, the sealing gasket 100 has a plurality of through holes 101 arranged in a matrix in the middle, and a matching hole 102 is arranged at each end of the through hole 101 matrix corresponding to the front and back sides of the switch. The through holes 101 correspond to a plurality of gas outlet holes on the arc extinguishing chamber 3, and the gas discharged from the top of the arc extinguishing chamber 3 enters the air vent hole 1111 on the bracket 11 through the through holes 101. The matching hole 102 is used for mounting between components.

[0041] The matching hole 102 is used to let the screw head of the screw on the arc extinguishing chamber 3. The clearance recess 103 is arranged on both sides of the sealing gasket 100, which makes the sealing gasket 100 have the same shape as the arc extinguishing cover of the arc extinguishing chamber 3.

[0042] The bracket 11 clamps the sealing gasket 100 and the sealing gasket 100 has the same shape as the arc extinguishing cover of the arc extinguishing chamber 3.

[0043] The sealing gasket 100 has a screw passing hole 104, which is used for fixing the screw of the top cover 12. The screw passes through the screw passing hole 104 and is screwed into the arc extinguishing cover of the arc extinguishing chamber 3, thereby completing the fixation of the top cover 12.

[0044] The number of the sealing gasket 100 is consistent with the number of the arc extinguishing chamber 3, and they are one-to-one corresponding.

[0045] Specifically, the installation process of the sealing gasket 100 is as follows: first, the sealing gasket 100 is adhered to the arc extinguishing cover of the arc extinguishing chamber 3 by glue to ensure the positioning of the two, and then the top cover 1 is installed.

[0046] In order to ensure that the sealing gasket 100 and the bracket 11 have excellent sealing performance, see Figure 4 The contact surface of the bracket 11 and the sealing gasket 100 is provided with a convex rib 114, which is pressed on the sealing gasket 100, and the convex rib 114 is annular and surrounds all the through holes 101 to ensure that the airflow is located inside the convex rib 114.

[0047] See Figure 8 And in combination with Figure 2 The switch further comprises a secondary assembly 4, which is installed on the front top of the shell 2 and 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, 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.

[0048] Further, see Figure 2The shell 2 is provided with a mask 5 on the front side, which covers the operating mechanism, the electric operating mechanism, the auxiliary switch and the controller installed on the front side of the shell 2, so as to prevent the operator from contacting the above-mentioned components during operation, thereby ensuring the personal safety of the operator.

[0049] See Figure 9 When the top cover 1 is installed in place, the partition member 112 is arranged between the adjacent arc extinguishing chambers 3, and the partition member 112 of the support 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 support 11 forms a second through cavity 14 between the left and right sides of the base 111 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 chambers 3 and the exhaust holes 1211 of the top cover 12. The dashed lines in the figure represent the gas flow direction. 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 member 112, and the gas in the side arc extinguishing chambers 3 enters the space on both sides upward and mixes with the gas from the middle arc extinguishing chamber 3, and is then discharged to the outside of the switch through the exhaust holes 1211 on both sides of the top cover 12. In the above structure, the partition member 112 is arranged to isolate the gases discharged from the adjacent arc extinguishing chambers 3 during the initial rising process, so that the front breakdown can be prevented.

[0050] Preferably, in order to balance the exhaust efficiency between the arc extinguishing chambers 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

[0051] As Figure 10 The difference between the present embodiment and embodiment 1 is that the support 11 is split type. Preferably, the number of split parts of the support 11 is consistent with the number of arc extinguishing chambers 3. More preferably, the number of split parts is consistent with the number of sealing gaskets 100, and they are one-to-one corresponding. 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 structures 300. The positioning and matching structures 300 can be mortise and tenon, or plug-in positioning mode. The split structure of the support 11 can better reduce the manufacturing cost and difficulty of the parts.

[0052] Further, as an equivalent solution of the present application, 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 other is arranged 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 arranged on the top cover 12, and the other part is arranged 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 solutions all belong to the protection scope of the present application. From the above-mentioned equivalent solutions, according to different embodiments, the exhaust hole 1211 can be arranged on the bracket 111 and / or the top cover 12, that is, the exhaust hole 1211 is arranged on both sides of the top cover 1.

[0053] In the above-mentioned embodiments, the arc-extinguishing chamber is three. Of course, when the arc-extinguishing chamber 3 is two, the partition plate 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 direction corresponding to the width of the switch. Of course, it is also feasible that the exhaust hole 1211 is formed on both sides.

[0054] When the arc-extinguishing chamber 3 is four, compared with the first embodiment, the partition plate 112 should be three, and other specific descriptions can be referred to the first embodiment.

Claims

1. A switch with a top cover, comprising a top cover (1), a housing (2) and an arc extinguishing chamber (3), said arc extinguishing chamber (3) being located at an opening of the housing (2), said top cover (1) being arranged on top of the housing (2) and covering a gas outlet of said arc extinguishing chamber (3), characterized in that: The sealing gasket (100) in sheet form is clamped between the bracket (11) of the top cover (1) and the arc extinguishing chamber (3), the contact surface of the bracket (11) and the sealing gasket (100) is provided with a convex rib (114), the convex rib (114) is pressed on the sealing gasket (100), the convex rib (114) is annular and surrounds a plurality of through holes (101) on the sealing gasket (100), the through holes (101) correspond to a plurality of gas outlet holes on the arc extinguishing chamber (3). ​ 2. A switch having a top housing as defined in claim 1, wherein: The top cover (1) further comprises a top cover (12), the top cover (12) and the bracket (11) are installed in cooperation.

3. A switch having a top housing as defined in claim 1, wherein: The plurality of through holes (101) are arranged in a matrix.

4. A switch having a top housing as defined in claim 1, wherein: The two ends of the matrix of through holes (101) correspond to the front and back sides of the switch are respectively provided with a matching hole (102), and the matching hole (102) allows the screw head of the screw on the arc extinguishing chamber (3) to pass through.

5. A switch having a top housing as defined in claim 1, wherein: The both sides of the sealing gasket (100) are provided with a recess (103), and the recess (103) makes the sealing gasket (100) have the same shape as the arc extinguishing cover of the arc extinguishing chamber (3).

6. A switch having a top housing as defined in claim 2, wherein: The sealing gasket (100) is further provided with a screw passing hole (104), the screw passing hole (104) is used for the screw to pass through the top cover (12), and the screw passes through the screw passing hole (104) and is screwed into the arc extinguishing cover of the arc extinguishing chamber (3).

7. A switch having a top housing as defined in claim 1, wherein: The sealing gasket (100) is made of rubber.

8. A switch having a top housing as defined in claim 1, wherein: The number of the sealing gasket (100) is consistent with the number of the arc extinguishing chamber (3), and the two are one-to-one correspondence.

9. A switch having a top housing as defined in claim 1, wherein: The sealing gasket (100) is adhered to the arc extinguishing cover of the arc extinguishing chamber (3) by glue, and then the top cover (1) is installed.

10. A switch having a top housing as defined in claim 2, wherein: The bracket (11) is split type, the number of split parts of the bracket (11) is consistent with the number of the sealing gasket (100), and the two are one-to-one correspondence.

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