A disconnector

Abstract

This utility model discloses a disconnecting switch, comprising: an operating mechanism, a housing, stationary contacts, and a moving contact assembly and an arc-extinguishing assembly disposed inside the housing; the operating mechanism is used to drive the moving contact assembly to rotate; two stationary contacts are respectively fixedly disposed on both sides of the housing; the moving contact assembly is rotatable, and two arc-extinguishing assemblies are respectively and correspondingly disposed on the rotation path of the moving contact assembly; when the moving contact assembly rotates to contact the stationary contacts, the disconnecting switch closes; each arc-extinguishing assembly and the housing form an exhaust chamber, and the housing is provided with two sets of exhaust holes, the two sets of exhaust holes being respectively and correspondingly disposed on the corresponding sidewalls of the housing in the exhaust chamber, each set of exhaust holes covering the nearest point to the separation point of the stationary contact and the moving contact assembly or being adjacent to the aforementioned nearest point. This utility model has high safety.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment technology, and specifically relates to a disconnecting switch. Background Technology

[0002] A disconnecting switch is a switching device capable of cutting off or connecting a circuit. It is primarily used to create a clear disconnect point in the circuit, thereby preventing safety accidents. In related technologies, a disconnecting switch includes an operating mechanism and a switch body. The switch body includes a housing, a stationary contact, a rotating shaft, a moving contact, and an arc-extinguishing assembly. The moving contact is connected to the rotating shaft, and the rotating shaft is connected to the operating mechanism. When opening the circuit, the handle is inserted into the operating mechanism, and turning the handle drives the rotating shaft to rotate, causing the moving contact to move away from the stationary contact, thus cutting off the circuit. When the moving contact separates from the stationary contact, an electric arc is generated. The arc-extinguishing assembly is positioned along the movement trajectory of the moving contact to extinguish the arc.

[0003] As the requirements for voltage values ​​in the power supply system continue to increase, the current values ​​in the circuit are also increasing, resulting in higher arc energy generated when related electrical appliances in the circuit are disconnected. This places higher demands on the safety of disconnecting switches, as traditional disconnecting switches are prone to casing cracking due to the accumulation of arc energy when the circuit is opened. Utility Model Content

[0004] In view of this, the present invention provides an isolating switch with high safety.

[0005] This utility model is achieved through the following technical solution:

[0006] A disconnecting switch includes: an operating mechanism, a housing, a stationary contact, and a moving contact assembly and an arc-extinguishing assembly disposed inside the housing;

[0007] The operating mechanism is used to drive the moving contact assembly to rotate;

[0008] The two stationary contacts are fixedly installed on both sides of the housing; the moving contact assembly is rotatable, and the two arc-extinguishing assemblies are respectively arranged one-to-one on the rotation path of the moving contact assembly; when the moving contact assembly rotates to contact the stationary contact, the disconnecting switch closes.

[0009] Each of the arc-extinguishing components and the housing form an exhaust chamber. The housing is provided with two sets of exhaust holes, which are correspondingly arranged on the respective sidewalls of the housing within the exhaust chamber.

[0010] Each set of exhaust holes is located at the nearest point to the separation point of the stationary contact and the moving contact assembly, or is located adjacent to the aforementioned nearest point.

[0011] Furthermore, the stationary contact has an overall sheet-like structure, with the first end extending out of the housing to form a wiring portion, and the opposite second end inserted into the housing and provided with a contact portion; the width of the second end is greater than the width of the first end.

[0012] Furthermore, the upper edges of the first and second ends of the stationary contact are flush, while the lower edge of the second end is wider than the lower edge of the first end.

[0013] Furthermore, the stationary contact includes a first side and a second side opposite to each other, and the contact portion is formed by bending a portion of the second end toward the second side.

[0014] Furthermore, the second end of the stationary contact is inclined toward the first side to form an inclined portion. When the stationary contact is installed in the housing, the second side is adjacent to the arc extinguishing assembly.

[0015] Furthermore, the end face of the contact portion away from the inclined portion is a slope, and the slope is inclined toward the second side along the direction from the second end to the first end, so that the position of the slope near the first end forms an acute static arc-drawing angle; the static arc-drawing angle is set toward the arc-extinguishing component;

[0016] Each moving contact includes an upper contact piece and a lower contact piece, which are arranged opposite to each other and have a gap between them. When the circuit is closed, the contact portion of the stationary contact extends into the gap between the upper and lower contact pieces and contacts the upper and lower contact pieces. The ends of the upper and lower contact pieces are provided with rounded chamfers as moving arc angles.

[0017] Furthermore, the opposing side surfaces of the upper and lower contact pieces are provided with right-angle chamfers II; the inclined surfaces of the contact portion are provided with right-angle chamfers I.

[0018] Furthermore, the central angle occupied by each of the arc-extinguishing components is 30° to 40°.

[0019] Furthermore, the maximum rotatable angle of the moving contact is 80° to 100°.

[0020] Furthermore, each group of vent holes includes more than one vent hole.

[0021] Beneficial effects:

[0022] (1) The present invention provides a disconnecting switch in which two sets of exhaust holes are arranged one-to-one on the corresponding housing sidewalls of the exhaust chamber, and each set of exhaust holes covers the nearest point to the separation point of the stationary contact and the moving contact assembly or is arranged adjacent to the aforementioned nearest point. When the pressure inside the housing increases instantaneously, the gas can be discharged in a timely and rapid manner, thereby reducing the gas pressure inside the housing and improving the safety of the disconnecting switch.

[0023] (2) The width of the second end of the static contact inside the housing is greater than the width of the first end outside the housing, which helps to reduce the material cost of the outer part of the housing.

[0024] (3) The static contact part provided by this utility model is formed by bending the part of the second end toward the second side. The direct bending process can reduce the waste generated during the processing of parts and further reduce the material cost.

[0025] (4) The second end of the stationary contact of this utility model is inclined toward the first side to form an inclined part, thereby increasing the distance between the moving contact and the stationary contact when the circuit is opened when the space inside the housing is limited, and in the opposite case, the volume of the housing can be reduced.

[0026] (5) The setting of the static arc-starting angle and the dynamic arc-starting angle of this utility model can more effectively introduce the arc into the arc-extinguishing chamber, reduce the residence time of the arc on the contact surface, and reduce the ablation and wear of the contact.

[0027] (6) The upper and lower contact plates of this utility model are provided with right angle chamfer II on their opposite side surfaces; right angle chamfer I is provided on both sides of the inclined surface of the contact part; the right angle chamfer I and right angle chamfer II facilitate the closing of the moving contact and the stationary contact. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the disconnecting switch of this utility model;

[0029] Figure 2 This is a diagram showing the internal structure of the switch body of this utility model;

[0030] Figure 3 This is a structural diagram of the housing of the switch body of this utility model;

[0031] Figure 4 This is a diagram showing the positional relationship between the moving contact, the stationary contact, and the arc-extinguishing assembly of this utility model;

[0032] Figure 5 This is an isometric drawing of the stationary contact of this utility model;

[0033] Figure 6 This is a structural diagram of the stationary contact of the present invention, wherein (1) is a front view and (2) is a left view;

[0034] Figure 7 for Figure 6 Top view;

[0035] Figure 8 This is an isometric drawing of the moving contact of this utility model;

[0036] Among them, 100 is the switch body, and 200 is the operating mechanism;

[0037] 1-Housing, 2-Static contact, 3-Arc extinguishing assembly, 4-Moving contact, 5-Rotating shaft, 6-Limiting surface I, 7-Limiting surface II, 8-Exhaust hole, 9-Mounting groove, 10-Moving contact assembly, 14-Wire connection part, 15-Inclined part, 16-Contact part, 17-Static arc ignition angle, 18-Inclined surface, 19-Right angle chamfer I, 29-Right angle chamfer II, 21-Moving arc ignition angle, 22-Exhaust chamber. Detailed Implementation

[0038] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] This embodiment provides a disconnecting switch, see appendix. Figure 1 It includes an operating mechanism 200 and one or more switch bodies 100; see appendix. Figure 2 Each switch body 100 includes a housing 1, a stationary contact 2, and a moving contact assembly 10 and an arc-extinguishing assembly 3 disposed inside the housing 1; the operating mechanism 200 is used to drive the moving contact assembly 10 to rotate;

[0040] Specifically, the operating mechanism 200 is equipped with a drive output component, and the switch body 100 is equipped with a drive receiving component, which is connected to the moving contact 4. When the operating mechanism 200 is connected to the switch body 100, the drive output component is connected to the drive receiving component. When the operating mechanism 200 is operated, the moving contact 4 can be mechanically driven to rotate through the connected drive component.

[0041] Two stationary contacts 2 are respectively installed on both sides of the housing 1; the moving contact assembly 10 is rotatable, and two arc-extinguishing components 3 are respectively installed on the rotation path of the moving contact assembly 10; when the moving contact assembly 10 rotates to contact the stationary contact 2, the disconnecting switch closes.

[0042] Each arc-extinguishing component 3 and the housing 1 form an exhaust chamber 22. The housing 1 is provided with two sets of exhaust holes 8. The two sets of exhaust holes are respectively provided on the corresponding side wall of the housing 1 in the exhaust chamber 22, and are closest to the separation point of the stationary contact 2 and the moving contact assembly 10.

[0043] Alternatively, let point A be the point on the side wall of the corresponding housing 1 of the exhaust chamber 22 that is closest to the aforementioned separation point, and let the distance between point A and the separation point be L. Each set of exhaust holes can be arranged adjacent to point A, that is, the distance between the center point of each set of exhaust holes and the separation point is L to 1.3L, which can be 1.05L, 1.1L, 1.15L, 1.2L, 1.25L and 1.3L;

[0044] During tripping, the voltage is high and the instantaneous current is large at the moment the stationary contact 2 and the moving contact assembly 10 separate, resulting in the highest arc energy. This can instantly ignite the air, causing a sharp increase in pressure inside the housing 1, leading to a momentary high voltage and making the housing 1 prone to explosion. The disconnecting switch provided in this embodiment has two sets of vent holes 8 correspondingly located on the sidewalls of the housing 1 of the vent chamber 22, and positioned closest to or adjacent to the point of separation between the stationary contact 2 and the moving contact assembly 10. This allows for timely and rapid gas discharge when the pressure inside the housing 1 increases instantaneously, reducing the gas pressure inside the housing 1, improving the safety of the disconnecting switch, and facilitating the miniaturization of the housing design.

[0045] Furthermore, each group of exhaust holes 8 includes one or more exhaust holes 8, and in a specific embodiment, each group of exhaust holes 8 includes two parallel exhaust holes 8.

[0046] See appendix Figure 3 and 4 The housing 1 is also provided with two limiting surfaces I6, two limiting surfaces II7 and two mounting grooves 9; the side of the stationary contact 2 that is away from the contact with the moving contact assembly 10 abuts against the corresponding limiting surface II7;

[0047] The moving contact assembly 10 includes a rotating shaft 5 and moving contacts 4; two moving contacts 4 are arranged on the radial sides of the rotating shaft 5. The moving contacts 4 can rotate with the rotating shaft 5 to contact the stationary contact 2, and the moving contacts 4 can also rotate with the rotating shaft 5 to abut against the corresponding limiting surface I6; at this time, the distance between the moving contacts 4 and the stationary contact 2 is the largest; the arc extinguishing assembly 3 is arranged in the corresponding mounting groove 9, so that the two arc extinguishing assemblies 3 are arranged one-to-one on the rotation path of the two moving contacts 4.

[0048] Furthermore, the two arc-extinguishing components 3 are arranged diagonally; with the axis of the rotating shaft 5 as the central axis, the central angle occupied by each arc-extinguishing component 3 is 30° to 40°, which can be 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, or 40°.

[0049] The maximum rotatable angle of the moving contact 4 is 80° to 100°, and can be 80°, 85°, 90°, 95°, or 100°.

[0050] See appendix Figure 5 -Appendix Figure 7 The stationary contact 2 includes a wiring portion 14 and a contact portion 16;

[0051] The stationary contact 2 has a sheet-like structure. The first end extends out of the housing 1 to form a wiring portion 14, and the opposite second end is inserted into the housing 1. The second end has a contact portion 16, and its width is greater than that of the first end. See details [link to documentation]. Figure 6(2) The upper edges of the first end to the second end of the stationary contact 2 are flush, while the lower edge of the second end is wider than the lower edge of the first end, thereby saving material at the first end and reducing material costs.

[0052] See Figure 6 (1) and Figure 7 The vertically arranged stationary contact 2 includes a first side and a second side opposite to each other, with the second end inclined toward the first side to form an inclined portion 15. (See also...) Figure 2 When the stationary contact 2 is vertically installed inside the housing 1, its first side abuts against the limiting surface II 7, and its second side is adjacent to the arc extinguishing component 3.

[0053] The contact portion 16 is formed by bending the portion of the second end toward the second side, see [reference]. Figure 6 The contact portion 16 is perpendicular to the inclined portion 15. The end face of the contact portion 16 away from the inclined portion 15 is a slope 18. The slope 18 is inclined towards the second side in the direction from the second end to the first end, so that a static arc-inducing angle 17 is formed at the position of the slope 18 near the first end. The static arc-inducing angle 17 is set towards the arc-extinguishing assembly 3, and the arc can be introduced into the arc-extinguishing assembly 3 through the tip of the acute angle. The other side forming the static arc-inducing angle 17 is perpendicular to the inclined portion 15.

[0054] The stationary contact 2 can be formed by cutting and bending on a copper plate, specifically by a stamping process.

[0055] See appendix Figure 8 Each moving contact 4 includes an upper contact piece and a lower contact piece, which are arranged opposite to each other with a gap between them. When the circuit is closed, the contact portion 16 of the stationary contact 2 extends into the gap between the upper and lower contact pieces and makes contact with them. The ends of both the upper and lower contact pieces are provided with rounded chamfers as moving arc-starting angles 21. The moving arc-starting angle 21 and the stationary arc-starting angle 17 work together to help the arc quickly enter the arc-extinguishing chamber to extinguish the arc.

[0056] Right-angle chamfers II29 are provided on the opposite sides of the upper and lower contact plates; right-angle chamfers I19 are provided on both sides of the inclined surface 18 of the contact part 16; the right-angle chamfers I19 and II29 facilitate the closing of the moving contact 4 and the stationary contact 2.

[0057] The angle of right angle chamfer I19 is 30° to 80°, and can be 30°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, or 80°; the angle of right angle chamfer II29 is 30° to 80°, and can be 30°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, or 80°.

[0058] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A disconnector, characterized in that include: Operating mechanism (200), housing (1), stationary contact (2), and moving contact assembly (10) and arc extinguishing assembly (3) disposed inside the housing (1); The operating mechanism is used to drive the moving contact assembly (10) to rotate; The two stationary contacts (2) are fixedly installed on both sides of the housing (1); the moving contact assembly (10) is rotatable, and the two arc-extinguishing assemblies (3) are respectively arranged on the rotation path of the moving contact assembly (10); when the moving contact assembly (10) rotates to contact the stationary contact (2), the disconnecting switch closes. Each of the arc-extinguishing components (3) and the housing (1) form an exhaust chamber (22). The housing (1) is provided with two sets of exhaust holes (8), which are respectively arranged on the corresponding side wall of the housing (1) of the exhaust chamber (22). Each set of exhaust holes is located at the nearest point to the separation point of the stationary contact (2) and the moving contact assembly (10), or is located adjacent to the aforementioned nearest point.

2. The disconnector according to claim 1, characterized in that The stationary contact (2) has a sheet-like structure. The first end extends out of the housing to form a wiring portion (14), and the opposite second end is inserted into the housing and is provided with a contact portion (16). The width of the second end is greater than the width of the first end.

3. The disconnector according to claim 2, characterized in that The upper edges of the first end to the second end of the stationary contact (2) are flush, while the lower edge of the second end is wider than the lower edge of the first end.

4. The disconnecting switch as described in claim 2, characterized in that, The stationary contact (2) includes a first side and a second side opposite to each other, and the contact portion (16) is formed by bending a portion of the second end toward the second side.

5. The disconnecting switch as described in claim 4, characterized in that, The second end of the stationary contact (2) is inclined toward the first side to form an inclined portion (15). When the stationary contact (2) is installed in the housing, the second side is adjacent to the arc extinguishing assembly (3).

6. The disconnecting switch as described in claim 5, characterized in that, The end face of the contact portion (16) away from the inclined portion (15) is a slope (18). The slope (18) is inclined toward the second side along the direction from the second end to the first end, so that the position of the slope (18) near the first end forms an acute angle of static arc-drawing angle (17); the static arc-drawing angle (17) is set toward the arc-extinguishing component (3). Each of the moving contacts (4) includes an upper contact piece and a lower contact piece, which are arranged opposite to each other and have a gap between them. When the circuit is closed, the contact portion (16) of the stationary contact (2) extends into the gap between the upper and lower contact pieces and contacts the upper and lower contact pieces. The ends of the upper and lower contact pieces are provided with rounded chamfers as moving arc angles (21).

7. The disconnecting switch as described in claim 6, characterized in that, The upper and lower contact pieces are provided with right-angle chamfers II (29) on their opposite side surfaces; the inclined surface (18) of the contact part (16) is provided with right-angle chamfers I (19) on both sides.

8. A disconnecting switch as described in any one of claims 1-7, characterized in that, Each of the arc-extinguishing components (3) occupies a central angle of 30° to 40°.

9. A disconnecting switch as described in any one of claims 1-7, characterized in that, The maximum rotatable angle of the moving contact (4) is 80° to 100°.

10. A disconnecting switch as described in any one of claims 1-7, characterized in that, Each group of vent holes (8) includes more than one vent hole.

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