Rotary isolating switch

Abstract

The utility model provides a rotary disconnecting switch, which comprises a shell, and a rotary contact assembly, a static contact and an arc extinguish chamber structure which are arranged in the shell, the rotary contact assembly comprises a moving contact, the static contact is fixedly arranged, the moving contact is rotatably arranged to be in contact with or disconnected from the static contact, and the arc extinguish chamber structure comprises at least one arc-shaped arc extinguish grid sheet group. The arc-extinguishing grid sheet group surrounds the side part of the rotating contact assembly and comprises a plurality of arc-extinguishing grid sheets, each arc-extinguishing grid sheet comprises a first gap and two grid sheet legs located at two sides of the first gap, the first gap faces the rotating contact assembly, the arc-extinguishing grid sheet further comprises an airflow gap located at one side far away from the first gap, the plurality of arc-extinguishing grid sheets are stacked and arranged at intervals, and the airflow gap is located at one side far away from the first gap. An air flow channel is formed between the plurality of air flow gaps and the shell, a gap between the arc extinguish chamber structure and the shell of the rotary disconnecting switch is increased, an air channel combing effect can be achieved in the extinguishing process of the arc extinguish chamber structure, and directional flowing of air flow is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a rotary disconnect switch. Background Technology

[0002] Rotary disconnect switches serve to isolate power supplies and break circuits. With the rapid development of the photovoltaic field, disconnect switches have also been widely used. In recent years, increasingly higher requirements have been placed on the current-carrying capacity and temperature rise performance of disconnect switches. Internally, a rotary disconnect switch includes a rotating contact assembly and an arc-extinguishing chamber. The arc-extinguishing chamber is used to extinguish the electric arc generated by the rotating contact assembly when the switch is opened.

[0003] In the prior art, the gap between the arc-extinguishing chamber and the rotary disconnector housing is small, which affects the directional flow of airflow, restricts pressure release, and causes residual conductive particles to remain, ultimately affecting the arc-extinguishing performance of the arc-extinguishing chamber. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rotary disconnect switch that facilitates directional airflow.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This application provides a rotary disconnect switch, including a housing and a rotary contact assembly, a stationary contact, and an arc-extinguishing chamber structure disposed inside the housing. The rotary contact assembly includes a moving contact, the stationary contact is fixedly disposed, and the moving contact is rotatably disposed to contact or disconnect from the stationary contact. The arc-extinguishing chamber structure includes at least one arc-shaped arc-extinguishing grid assembly surrounding the side of the rotary contact assembly. The arc-extinguishing grid assembly includes multiple arc-extinguishing grids, each arc-extinguishing grid including a first notch and two grid legs located on both sides of the first notch, the first notch facing the rotary contact assembly.

[0007] The arc-extinguishing grid also includes at least one airflow notch located on the side away from the first notch, and the plurality of arc-extinguishing grids are stacked and spaced apart, so that an airflow channel is formed between the airflow notches corresponding to the plurality of arc-extinguishing grids and the housing.

[0008] In one possible implementation, the first notch includes a first arc-extinguishing groove at the inlet and a second arc-extinguishing groove at the bottom, the first and second arc-extinguishing grooves are connected, the first arc-extinguishing groove has a "V" shaped structure, and the second arc-extinguishing groove has a "U" shaped structure and is inclined.

[0009] In one possible implementation, the width at the entrance of the first notch is greater than the width at the bottom of the first notch, including opposing first and second sides, with the first side protruding toward the second side to form a triangular tip structure. There is a gap between the tip structure and the second side. The tip structure divides the first notch into the first arc-extinguishing groove and the second arc-extinguishing groove. Adjacent arc-extinguishing grids are arranged in an alternating pattern, such that the second arc-extinguishing grooves of the first notches of adjacent arc-extinguishing grids are tilted in opposite directions, and the protrusion directions of the tip structure are opposite.

[0010] In one possible implementation, the arc-extinguishing grid plate also includes at least one airflow notch at the end corner away from the first notch, and the airflow notch of the plurality of arc-extinguishing grid plates also forms the airflow channel between the housing.

[0011] In one possible implementation, the arc-extinguishing grid includes two airflow notches corresponding to two grid legs, and an airflow gap located between the two airflow notches, the airflow gap corresponding to a first gap.

[0012] In one possible implementation, the arc-extinguishing chamber structure includes two arc-extinguishing grid groups, and the rotary disconnect switch includes two stationary contacts. The two arc-extinguishing grid groups are laterally distributed on both sides of the rotary contact assembly, and the two stationary contacts are longitudinally distributed on both sides of the rotary contact assembly. The two ends of the arc-extinguishing grid groups correspond to the two stationary contacts respectively. The two arc-extinguishing grid groups are in close contact with the rotary contact assembly, and the stationary contacts extend into the rotary contact assembly and are inserted and engaged with the moving contacts.

[0013] In one possible implementation, the housing is provided with an exhaust channel, which is correspondingly connected to the airflow channel and communicates with the exhaust hole on the housing. A flow divider is provided between the exhaust channel and the airflow channel, and an inclined flow restrictor is provided inside the exhaust channel.

[0014] In one possible implementation, the exhaust channel is located at one corner of the housing between the arc-extinguishing grid assembly and the stationary contact. One end of the diverter plate is close to the arc-shaped outer wall of the arc-extinguishing grid assembly, and the other end extends to the inlet of the exhaust channel. At least two flow-limiting plates are provided in the exhaust channel, and the at least two flow-limiting plates extend from two opposite side walls of the exhaust channel and are inclined from the airflow channel toward the exhaust port.

[0015] In one possible implementation, the rotary contact assembly further includes a support base and a support cover, the support cover fitting over the support base, and the moving contact disposed between the support base and the support cover.

[0016] The moving contact includes two opposing moving contact pieces, a contact support, at least one fixed shaft, and at least one elastic element. The two ends of the two moving contact pieces form clamping gaps for clamping the stationary contact. The two opposite sides of the contact support are provided with two grooves, which are through structures along the length of the moving contact. The middle portions of the two moving contact pieces are respectively placed in the two grooves, and the two ends extend out of the grooves. The elastic element is disposed on the side of the moving contact piece facing away from the contact support. At least one fixed shaft passes through the elastic element, one moving contact piece, the contact support, and the other moving contact piece in sequence, fixing the two moving contact pieces, the contact support, and the elastic element into a whole. The clamping gaps at both ends of the two moving contact pieces are located between the support base and the support cover. The stationary contact extends between the support base and the support cover and is inserted and engaged with the moving contact.

[0017] In one possible implementation, the two moving contact pieces have identical structures, one side of each moving contact piece includes at least one boss, and the bosses of the two moving contact pieces abut against each other, forming the clamping gap at both ends of the two moving contact pieces. The contact support includes two opposing contact side plates and a contact cross plate located between the two contact side plates. The two contact side plates are connected to the contact cross plate, and the grooves are formed on both sides of the contact cross plate. The two ends of the contact cross plate in the length direction include second notches, and the bosses of the two moving contact pieces are at least partially located within the second notches.

[0018] Compared to existing technologies, this application provides a rotary disconnecting switch. The arc-extinguishing chamber structure includes at least one arc-shaped arc-extinguishing grid assembly. The arc-shaped arc-extinguishing grid assembly follows the rotation trajectory of the rotary contact assembly and surrounds the side of the rotary contact assembly. The arc-extinguishing grid assembly includes multiple arc-extinguishing grids. Each arc-extinguishing grid has a first notch for cutting the electric arc and an airflow notch on opposite sides. The multiple arc-extinguishing grids are stacked and spaced apart, so that the multiple airflow notches form an airflow channel between the housing and the housing. This increases the gap between the arc-extinguishing chamber structure and the rotary disconnecting switch housing. During the arc-extinguishing process, this can help to organize the airflow and facilitate the directional flow of air.

[0019] In addition, the arc-extinguishing grid plate includes at least one airflow notch at the end corner away from the first notch. The airflow notch and the airflow notch form a wave-like airflow channel of varying width between the airflow notch and the housing, which is more conducive to extinguishing the arc or exhausting the gas.

[0020] In addition, the rotating contact assembly also includes a support base and a support cover. The support cover is fitted onto the support base, and the moving contact is disposed between the support base and the support cover. The moving contact includes two oppositely arranged and structurally identical moving contact pieces, a contact support, at least one fixed shaft, and at least one elastic element. The two ends of the two moving contact pieces form a clamping gap for clamping the stationary contact. The two opposite sides of the contact support are provided with two grooves, which are through structures along the length of the moving contact. The middle portions of the two moving contact pieces are respectively placed in the two grooves, and the two ends extend out of the grooves. The elastic element is disposed on the moving contact piece facing away from the contact. On the supporting side, at least one of the fixed shafts sequentially passes through the elastic element, one moving contact piece, the contact support, and another moving contact piece. One side of the moving contact piece also includes at least one boss. The bosses of the two moving contact pieces abut against each other, so that the two ends of the two moving contact pieces form the clamping gap. The boss can be formed by stamping on the back of the moving contact piece, without bending the moving contact piece, reducing process steps, making production convenient and low-cost. At the same time, the elastic element is set on the side of the moving contact piece facing away from the contact support, providing clamping force for the two ends of the moving contact, making the connection between the moving contact and the stationary contact more reliable, and improving the current carrying capacity and temperature rise performance of the rotary disconnector.

[0021] In addition, the contact support includes two opposing contact side plates and a contact cross plate located between the two contact side plates. The two contact side plates are connected to the contact cross plate, and the grooves are formed on both sides of the contact cross plate. The two ends of the contact cross plate in the length direction include second notches. The bosses of the two moving contact pieces are at least partially located in the second notches, which can limit the two moving contact pieces. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the rotary contact assembly of this utility model;

[0023] Figure 2 This is an installation diagram of the support cover, moving contact and support base of this utility model;

[0024] Figure 3 This is an exploded view of the rotary contact assembly of this utility model;

[0025] Figure 4 This is an exploded view of the moving contact of this utility model;

[0026] Figure 5 This is a cross-sectional view of the moving contact of this utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the support cover of this utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the support base of this utility model;

[0029] Figure 8 This is a schematic diagram of the arc-extinguishing grid sheet of this utility model;

[0030] Figure 9 This is a schematic diagram of the arc-extinguishing grid assembly of this utility model;

[0031] Figure 10 This is a cross-sectional view of the rotary disconnect switch of this utility model;

[0032] Figure 11 and Figure 12 This is a structural diagram of the internal layout of the rotary disconnect switch of this utility model.

[0033] The reference numerals in the attached drawings include: housing 100; operating mechanism 102; rotating contact assembly 101; moving contact 1; stationary contact 15; arc-extinguishing grid assembly 2; exhaust channel 103; flow divider 104; flow restrictor 105; insulating protective plate 21; arc-extinguishing grid 22; first notch 23; grid leg 24; airflow notch 25; airflow notch 26; airflow channel 115; tip structure 233; first mounting protrusion 221; support base 31; Support cover 32; moving contact piece 11; contact support 12; fixed shaft 13; elastic element 14; groove 121; boss 111; first locking part 131; second riveting part 132; riveting groove 134; contact side plate 122; contact cross plate 123; second notch 124; first limiting groove 113; bending protrusion 141; flat plate support part 142; first bending part 143; second bending part 144; bending protrusion 1121. Detailed Implementation

[0034] The specific embodiments of this utility model are further described below with reference to the accompanying drawings. The scope of protection of this utility model is not limited to the description of the following embodiments.

[0035] like Figures 1-12As shown, the rotary disconnect switch includes an operating mechanism 102, a housing 100, and a rotary contact assembly 101, a stationary contact 15, and an arc-extinguishing chamber structure disposed inside the housing 100. The operating mechanism 102 is connected to the rotary contact assembly 101 to drive the rotary contact assembly 101 to rotate. The rotary contact assembly 101 includes a moving contact 1, and the stationary contact 15 is fixedly installed on the housing. The moving contact 1 is rotatably disposed. The rotary contact assembly 101 is driven to rotate by the operating mechanism 102 to connect or disconnect the moving contact 1 from the stationary contact 15. The arc-extinguishing chamber structure is located on one side of the rotary contact assembly 101 and is used to extinguish the electric arc generated at the moment when the moving contact 1 and the stationary contact 15 are disconnected or closed. The moving contact 1 is a long plate-shaped structure with a rotating center and clamping gaps at both ends. The moving contact 1 is clamped and connected to the stationary contact 15 through the clamping gaps at both ends. When the moving contact 1 rotates to a certain angle, its two ends can contact and close with the stationary contact 15 to realize the circuit conduction. When the moving contact 1 rotates again, it can disconnect from the stationary contact 15 to realize the circuit disconnection. The rotary disconnecting switch is usually connected in series in the circuit. The connection and disconnection of the moving contact 1 and the stationary contact 15 control the conduction and disconnection of the circuit.

[0036] like Figures 9-12 As shown, the arc-extinguishing chamber structure includes at least one arc-shaped arc-extinguishing grid group 2. The arc-shaped arc-extinguishing grid group 2 follows the rotation trajectory of the rotating contact assembly 101 and surrounds the side of the rotating contact assembly 101. In a preferred embodiment of this application, the arc-extinguishing chamber structure includes two arc-extinguishing grid groups 2. The rotary disconnecting switch includes two stationary contacts 15. The two arc-extinguishing grid groups 2 are laterally distributed on both sides of the rotating contact assembly 101, and the two stationary contacts 15 are longitudinally distributed on both sides of the rotating contact assembly 101. The two ends of the arc-extinguishing grid group 2 correspond to the two stationary contacts 15 respectively. The two arc-shaped arc-extinguishing grid groups 2 surround the two sides of the rotating contact assembly 101, enclosing the rotating contact assembly 101. The two arc-extinguishing grid groups 2 are in close contact with the rotating contact assembly 101. The stationary contacts 15 extend into the rotating contact assembly 101 and are inserted and engaged with the moving contact 1, which can effectively extinguish the arc generated when the moving contact 1 and the stationary contact 15 are in contact or disconnected.

[0037] Preferred, such as Figure 11 As shown, the housing 100 is provided with an exhaust channel 103, which is correspondingly connected to the airflow channel 115 and communicates with the exhaust hole on the housing 100. It is used to discharge the high-temperature gas generated by the electric arc to the outside of the housing 100. A flow divider 104 is provided between the exhaust channel 103 and the airflow channel 115. An inclined flow limiter 105 is provided in the exhaust channel 103. The flow divider 104 is used to separate the gas in the airflow channel 115 and then introduce it into the exhaust channel 103. The two inclined flow limiters 105 are used to change the airflow path, prevent gas backflow, and avoid gas backflow affecting the arc extinguishing effect of the arc extinguishing chamber.

[0038] Preferably, the exhaust channel 103 is located at one corner of the housing 100 between the arc-extinguishing grid group 2 and the stationary contact 15. One end of the diverter plate 104 is close to the arc-shaped outer wall of the arc-extinguishing grid group 2, and the other end extends to the inlet of the exhaust channel 103. At least two flow-limiting plates 105 are provided in the exhaust channel 103. The at least two flow-limiting plates 105 extend from two opposite side walls of the exhaust channel 103 and are inclined from the airflow channel 115 toward the exhaust hole.

[0039] like Figures 8-12 The arc-extinguishing grid assembly 2 includes two insulating plates 21 and a plurality of arc-extinguishing grids 22 installed between the two insulating plates 21. The arc-extinguishing grids 22 are stacked and spaced apart. Each arc-extinguishing grid 22 includes a first notch 23 for cutting the arc and two grid legs 24 located on both sides of the first notch 23. The first notch 23 faces the rotary contact assembly 101. Each arc-extinguishing grid 22 also includes at least one airflow notch 25 located on the side away from the first notch 23. The plurality of arc-extinguishing grids 22 are stacked and spaced apart, so that the plurality of airflow notches 25 form an airflow channel 115 between the plurality of airflow notches 25 and the housing 100 of the rotary disconnector, increasing the gap between the arc-extinguishing chamber structure and the rotary disconnector housing. During the arc-extinguishing process, this can play a role in clearing the airflow and facilitating the directional flow of airflow. Figure 11 and Figure 12 This is a structural diagram of the internal layout of the rotary disconnect switch of this utility model. Figure 12 yes Figure 11 A schematic diagram of the structure of an arc-extinguishing grid assembly 2 without the insulating protective plate 21.

[0040] Preferred, such as Figure 8 and Figure 10 As shown, the airflow notch 25 is arc-shaped, and its smooth arc structure facilitates airflow. The arc-extinguishing grid plate 22 also includes at least one airflow notch 26 at its end corner away from the first notch 23. The airflow notches 26 of the multiple arc-extinguishing grid plates 22 also form airflow channels 115 with the housing 100. The airflow notch 25 is located in the middle of the side of the arc-extinguishing grid plate 22 away from the first notch 23, and the airflow notch 26 is located at the end corner of this side, i.e., at the junction of the side of the arc-extinguishing grid plate 22 away from the first notch 23 and the side near the insulating protective plate 21. The airflow notch 25 and the airflow notch 26 form airflow channels 115 of varying widths, resembling a wave shape, which is more conducive to arc extinguishing or exhaust.

[0041] Furthermore, such as Figure 8As shown, the arc-extinguishing grid plate 22 includes two airflow notches 26, which correspond to two grid plate legs 24, and an airflow gap 25 is located between the two airflow notches 26, which corresponds to the first gap 23; or, the arc-extinguishing grid plate 22 includes one airflow notch 26, which corresponds to one grid plate leg 24, and an airflow gap 25 is located on one side of the airflow notch 26, which corresponds to the first gap 23.

[0042] Preferred, such as Figure 8 As shown, the first notch 23 includes a first arc-extinguishing groove at the entrance and a second arc-extinguishing groove at the bottom. The first and second arc-extinguishing grooves are connected. The first arc-extinguishing groove has a "V" shaped structure, and the second arc-extinguishing groove has a "U" shaped structure and is inclined.

[0043] Furthermore, such as Figure 8 As shown, the width at the entrance of the first notch 23 is greater than the width at the bottom of the first notch 23, including a first side and a second side opposite to each other. The first side protrudes toward the second side, forming a triangular tip structure 233. There is a gap between the tip structure 233 and the second side. The tip structure 233 divides the first notch 23 into the first arc-extinguishing groove and the second arc-extinguishing groove.

[0044] Furthermore, such as Figure 9 As shown, the adjacent arc-extinguishing grid plates 22 are arranged in an alternating pattern, so that the second arc-extinguishing grooves of the first notch 23 of the adjacent arc-extinguishing grid plates 22 are tilted in opposite directions, and the protrusions of the tip structure 233 are in opposite directions.

[0045] Preferably, the arc-extinguishing grid plate 22 includes at least one first mounting structure on both sides, and the insulating protective plate 21 is provided with a second mounting structure that cooperates with the first mounting structure for installation and fixation.

[0046] Furthermore, such as Figure 8 and Figure 9 As shown, the first mounting structure includes a first mounting protrusion 221, and the second mounting structure is a first mounting groove or a first mounting hole. In this embodiment, two first mounting protrusions 221 are respectively provided at intervals on both sides of the arc-extinguishing grid plate 22, and multiple first mounting holes are provided on the two insulating protective plates 21 for mounting and fixing multiple arc-extinguishing grid plates 22.

[0047] Preferred, such as Figures 1-7As shown, the rotating contact assembly 101 includes a support base 31 and a support cover 32. The support cover 32 covers the support base 31. A moving contact 1 is disposed between the support base 31 and the support cover 32. The moving contact 1 includes two moving contact pieces 11 disposed opposite to each other, a contact support 12, at least one fixed shaft 13, and at least one elastic element 14. The two moving contact pieces 11 have clamping gaps at both ends for clamping a stationary contact 15. The contact support 12 has two grooves 121 on its opposite sides. The two grooves 121 are through structures along the length of the moving contact 1. The middle portions of the two moving contact pieces 11 are respectively placed in the two grooves 121, and the two ends extend out of the grooves 121. An elastic element 14 is disposed on the side of one moving contact piece 11 facing away from the contact support 12, or two elastic elements. 14 is disposed on the opposite sides of the two moving contact pieces 11, providing an inward clamping force for the two moving contact pieces 11. At least one of the fixed shafts 13 passes through the two moving contact pieces 11, the contact support 12, and the elastic member 14, fixing the two moving contact pieces 11, the contact support 12, and the elastic member 14 into a whole. In one embodiment of this application, one fixed shaft 13 may pass through the center of the two moving contact pieces 11, the contact support 12, and the elastic member 14. Or in another embodiment, at least two fixed shafts 13 pass through both sides of the center of the two moving contact pieces 11, the contact support 12, and the elastic member 14. The clamping gaps at both ends of the two moving contact pieces 11 are located between the support base 31 and the support cover 32. The stationary contact 15 extends between the support base 31 and the support cover 32 and is inserted and engaged with the moving contact 1.

[0048] The two moving contact pieces 11 have identical structures, and one side of each moving contact piece 11 includes at least one boss 111. The bosses 111 of the two moving contact pieces 11 abut against each other, forming the clamping gap at both ends of the two moving contact pieces 11. The bosses 111 can be formed by stamping on the back of the moving contact pieces 11, eliminating the need to bend the moving contact pieces, reducing process steps, and making production convenient and cost-effective. At the same time, the elastic element 14 provides a stronger clamping force between the moving contact 1 and the stationary contact 15, ensuring reliable contact between the moving contact 1 and the stationary contact 15, and improving the current carrying capacity and temperature rise performance of the rotary disconnector. Figure 6 This is a schematic diagram of the structure supporting the cover in this application. Figure 7 This is a structural schematic diagram of the support base of this application, showing that the support base and the support cover are fixedly installed by heat fusion and / or by snap fastener.

[0049] In a preferred embodiment of this application, the moving contact 1 includes an elastic element 14, two moving contact pieces 11, and a contact support 12, and the fixed shaft 13 passes through the elastic element 14, one moving contact piece 11, the contact support 12, and the other moving contact piece 11 in sequence.

[0050] Preferred, such as Figures 3-5As shown, the moving contact piece 11 includes two protrusions 111. Two protrusions 111 are provided between the two ends of the moving contact piece 11 and the middle portion of the moving contact piece 11, which can improve the stability of the moving contact 1 and prevent the two moving contact pieces 11 of the moving contact 1 from swaying or shaking. Figure 5 This is a cross-sectional view of the moving contact 11 of this application.

[0051] Preferred, such as Figures 3-5 As shown, the fixed shaft 13 includes a first locking part 131 and a second riveting part 132 connected together. The first locking part 131 has a disc structure, and the second riveting part 132 has a cylindrical structure. The diameter of the first locking part 131 is larger than the diameter of the second riveting part 132. The second riveting part 132 passes through at least one of the elastic members 14, two moving contact pieces 11, and contact support 12. The first locking part 131 abuts against the upper surface of the elastic member 14, so that at least one of the elastic members 14, two moving contact pieces 11, and contact support 12 are fixed as a whole.

[0052] Furthermore, such as Figure 5 and Figure 10 As shown, the bottom opening of the second riveting part 132 forms a riveting groove 134, which is riveted to the moving contact piece 11. The method of fixing by riveting with a fixed shaft 13 can improve the stability of the moving contact 1, which is convenient to operate and low in cost. Of course, it can also be fixed by welding or gluing, which is also within the scope of protection of this application.

[0053] Furthermore, such as Figure 4 As shown, the contact support 12 includes two opposing contact side plates 122 and a contact cross plate 123 located between the two contact side plates 122. The two contact side plates 122 are connected to the contact cross plate 123. The grooves 121 are formed on both sides of the contact cross plate 123. The two ends of the contact cross plate 123 in the length direction include second notches 124. The bosses 111 of the two moving contact pieces 11 are at least partially located in the second notches 124, limiting the two moving contact pieces 11.

[0054] Preferred, such as Figures 3-4 As shown, the moving contact piece 11 has a first limiting groove 113 at both ends, and the elastic member 14 has a bending protrusion 141 at both ends. The bending protrusion 141 abuts against the first limiting groove 113 to limit the movement of the elastic member 14.

[0055] Furthermore, such as Figures 3-4As shown, the elastic member 14 includes a flat plate support portion 142 located in the middle. The two ends of the flat plate support portion 142 are bent and connected to a first bending portion 143 and a second bending portion 144, respectively. The bending angle between the flat plate support portion 142 and the first bending portion 143 is an obtuse angle. The first bending portion 143 and the second bending portion 144 are bent and connected to form the bending protrusion 141.

[0056] Furthermore, such as Figure 5 As shown, the preferred flat plate support 142 is parallel to the moving contact piece 11, and there is a deformation gap between the flat plate support 142 and the moving contact piece 11, so that the elastic member 14 can deform and provide clamping force for both ends of the moving contact 1.

[0057] Furthermore, such as Figure 2 As shown, the moving contact piece 11 has two bent protrusions 1121 on both sides at both ends. The two bent protrusions 1121 of the two moving contact pieces 11 bend in opposite directions, which increases the angle between the two ends of the moving contact 1, making it easier to insert the stationary contact 15.

[0058] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0059] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A rotary disconnect switch, comprising a housing (100) and a rotary contact assembly (101), a stationary contact (15), and an arc-extinguishing chamber structure disposed inside the housing (100), wherein the rotary contact assembly (101) includes a moving contact (1), the stationary contact (15) is fixedly disposed, and the moving contact (1) is rotatably disposed to contact or disconnect from the stationary contact (15), and the arc-extinguishing chamber structure includes at least one arc-extinguishing grid plate group (2) surrounding the side of the rotary contact assembly (101), the arc-extinguishing grid plate group (2) includes a plurality of arc-extinguishing grid plates (22), the arc-extinguishing grid plates (22) including a first notch (23) and two grid plate legs (24) located on both sides of the first notch (23), the first notch (23) facing the rotary contact assembly (101). Its features are, The arc-extinguishing grid (22) also includes at least one airflow notch (25) located on the side away from the first notch (23). The multiple arc-extinguishing grids (22) are stacked and spaced apart, so that an airflow channel (115) is formed between the airflow notch (25) corresponding to the multiple arc-extinguishing grids (22) and the housing (100).

2. The rotary disconnector according to claim 1, characterized in that, The first notch (23) includes a first arc-extinguishing groove at the entrance and a second arc-extinguishing groove at the bottom. The first arc-extinguishing groove and the second arc-extinguishing groove are connected. The first arc-extinguishing groove has a "V" shaped structure, and the second arc-extinguishing groove has a "U" shaped structure and is inclined.

3. The rotary disconnector according to claim 2, characterized in that, The width at the entrance of the first notch (23) is greater than the width at the bottom of the first notch (23), including a first side and a second side opposite to each other. The first side protrudes toward the second side, forming a triangular tip structure (233). There is a gap between the tip structure (233) and the second side. The tip structure (233) divides the first notch (23) into the first arc-extinguishing groove and the second arc-extinguishing groove. The adjacent arc-extinguishing grid plates (22) are arranged alternately, so that the second arc-extinguishing grooves of the first notch (23) of the adjacent arc-extinguishing grid plates (22) are tilted in opposite directions, and the protrusion directions of the tip structure (233) are opposite.

4. The rotary disconnector according to claim 1, characterized in that, The arc-extinguishing grid plate (22) further includes at least one airflow notch (26) at the end corner away from the first notch (23), and the airflow notch (26) of the plurality of arc-extinguishing grid plates (22) also forms the airflow channel (115) with the housing (100).

5. The rotary disconnector according to claim 4, characterized in that, The arc-extinguishing grid (22) includes two airflow notches (26), which correspond to two grid legs (24). An airflow gap (25) is located between the two airflow notches (26) and corresponds to the first gap (23).

6. The rotary disconnector according to claim 1, characterized in that, The arc-extinguishing chamber structure includes two arc-extinguishing grid groups (2), and the rotary disconnect switch includes two stationary contacts (15). The two arc-extinguishing grid groups (2) are laterally distributed on both sides of the rotary contact assembly (101), and the two stationary contacts (15) are longitudinally distributed on both sides of the rotary contact assembly (101). The two ends of the arc-extinguishing grid groups (2) correspond to the two stationary contacts (15) respectively. The two arc-extinguishing grid groups (2) are in close contact with the rotary contact assembly (101), and the stationary contacts (15) extend into the rotary contact assembly (101) and are inserted and engaged with the moving contact (1).

7. The rotary disconnector according to claim 1, characterized in that, An exhaust channel (103) is provided on the housing (100). The exhaust channel (103) is correspondingly connected to the airflow channel (115) and communicates with the exhaust hole on the housing (100). A flow divider (104) is provided between the exhaust channel (103) and the airflow channel (115). An inclined flow restrictor (105) is provided inside the exhaust channel (103).

8. The rotary disconnector according to claim 7, characterized in that, The exhaust channel (103) is located at one corner of the housing (100) between the arc-extinguishing grid assembly (2) and the stationary contact (15). One end of the diverter plate (104) is close to the arc-shaped outer wall of the arc-extinguishing grid assembly (2), and the other end extends to the inlet of the exhaust channel (103). At least two flow-limiting plates (105) are provided in the exhaust channel (103). The at least two flow-limiting plates (105) extend from the two opposite side walls of the exhaust channel (103) and are inclined from the airflow channel (115) toward the exhaust hole.

9. The rotary disconnect switch according to claim 1, characterized in that, The rotary contact assembly (101) further includes a support base (31) and a support cover (32), the support cover (32) covering the support base (31), and the moving contact (1) being disposed between the support base (31) and the support cover (32). The moving contact (1) includes two opposing moving contact pieces (11), a contact support (12), at least one fixed shaft (13), and at least one elastic element (14). The two moving contact pieces (11) form clamping gaps at both ends for clamping the stationary contact (15). The contact support (12) has two grooves (121) on its opposite sides. The two grooves (121) are through-type along the length of the moving contact (1). The middle portions of the two moving contact pieces (11) are respectively placed within the two grooves (121), and both ends extend from within the grooves (121). The elastic element (14) 14) On the side of the moving contact piece (11) facing away from the contact support (12), at least one of the fixed shafts (13) passes through the elastic member (14), one moving contact piece (11), the contact support (12) and another moving contact piece (11) in sequence, fixing the two moving contact pieces (11), the contact support (12) and the elastic member (14) into a whole. The clamping gaps at both ends of the two moving contact pieces (11) are located between the support seat (31) and the support cover (32). The stationary contact (15) extends between the support seat (31) and the support cover (32) and is inserted and engaged with the moving contact (1).

10. The rotary disconnector according to claim 9, characterized in that, The two moving contact pieces (11) have the same structure. One side of each moving contact piece (11) includes at least one boss (111). The bosses (111) of the two moving contact pieces (11) abut against each other, so that the two ends of the two moving contact pieces (11) form the clamping gap. The contact support (12) includes two opposing contact side plates (122) and a contact cross plate (123) located between the two contact side plates (122). The two contact side plates (122) are connected to the contact cross plate (123). The grooves (121) are formed on both sides of the contact cross plate (123). The two ends of the contact cross plate (123) in the length direction include second notches (124). The bosses (111) of the two moving contact pieces (11) are at least partially located in the second notches (124).

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