Isolating switch

Abstract

The utility model relates to the field of electrical equipment, and particularly discloses an isolating switch which comprises a base and a cover plate, a plurality of cavities are formed in the base and the cover plate, first static contact pieces are arranged at the two ends of the cavity of the base, a second static contact piece is fixedly connected to the middle of the cavity of the cover plate, a control shaft is arranged on the base in a penetrating mode, and the first static contact piece and the second static contact piece are fixedly connected. The surface of the control shaft is fixedly connected with movable contact piece assemblies, the movable contact piece assemblies are in one-to-one correspondence with the cavities, each movable contact piece assembly comprises a clamping sleeve connected to the control shaft in a sleeving mode and a clamping piece arranged in the clamping sleeve, and a partition plate is arranged between every two adjacent cavities. The isolating switch has the effects of reducing interference of adjacent circuits and suppressing electric arcs.

Description

Technical Field

[0001] This application relates to the field of electrical equipment, and in particular to a disconnecting switch. Background Technology

[0002] As an indispensable electrical device in the power system, the importance of disconnecting switches is self-evident. They are mainly used for isolating power sources, performing switching operations, and connecting and disconnecting low-current circuits, ensuring the personal safety of maintenance personnel.

[0003] In multiphase circuits, multi-pole disconnect switches have unique advantages, as they can simultaneously control the on / off state of multiple circuits. Through the coordinated action of multiple poles, multi-pole disconnect switches achieve synchronous control of multiphase power supplies, ensuring stable circuit operation. However, due to electromagnetic coupling, interference can occur between adjacent poles, thus affecting the normal operation of the entire power system. Utility Model Content

[0004] To ensure current stability and reduce interference from adjacent circuits, this application provides an isolating switch.

[0005] The disconnecting switch provided in this application adopts the following technical solution:

[0006] A disconnect switch includes a base and a cover plate. Both the base and the cover plate have multiple chambers. A first stationary contact piece is provided at both ends of the chambers of the base. A second stationary contact piece is fixedly connected to the middle of the chambers of the cover plate. A control shaft passes through the base. A moving contact piece assembly is fixedly connected to the surface of the control shaft. The moving contact piece assembly corresponds to each chamber. The moving contact piece assembly includes a sleeve fitted onto the control shaft and a clip disposed within the sleeve. A partition plate is provided between two adjacent chambers.

[0007] By adopting the above technical solution, the rotating control shaft drives the clamping plate to rotate within the cavity, causing the moving contact assembly to contact or separate from the first stationary contact in the corresponding cavity and the second stationary contact of the cover plate, thereby realizing the connection and disconnection of the circuit. Furthermore, each moving contact assembly and stationary contact are closed and opened within a separate cavity, which effectively reduces interference caused by electromagnetic coupling between adjacent circuits during current flow, avoids arc interference, and ensures current stability, thus ensuring the safety and flexibility of operation.

[0008] Optionally, the control shaft is fitted with a positioning ring, and the positioning ring and the moving contact assembly are alternately fitted on the control shaft, and the partition plate is provided with a positioning groove for the positioning ring to engage.

[0009] By adopting the above technical solution, each moving contact assembly can be stably fixed in a separate chamber, and the positioning ring and partition plate can completely seal the chamber, thereby effectively separating adjacent chambers, ensuring insulation isolation between adjacent chambers, reducing the possibility of mutual current interference between adjacent chambers, and realizing reliable control and safe isolation of the circuit.

[0010] Optionally, the jacket is provided with rotating parts on both sides, and the partition plate is provided with a groove for the rotating parts to rotate, the groove being arc-shaped.

[0011] By adopting the above technical solution, it is easy to control the shaft to drive the moving contact assembly to rotate. The arc-shaped groove can fit tightly with the rotating part and provide a smooth guiding surface for the rotating part, thereby ensuring that the moving contact assembly remains stable during the switching process and avoiding poor contact or damage caused by the impact during rotation, thus ensuring the safety of circuit switching.

[0012] Optionally, limit blocks are provided on both sides of the cavity of the base near the first stationary contact piece.

[0013] By adopting the above technical solution, when the moving contact assembly rotates, the limiting block can limit the rotation angle of the moving contact assembly, thereby preventing the circuit from being broken due to excessive rotation angle, ensuring the stability and controllability of the moving contact assembly during the sliding process, avoiding accidental displacement, and improving safety during use.

[0014] Optionally, each of the moving contact components is provided with two clips, each of the clips is provided with two contact fingers, and both contact fingers are located on the side close to the cover plate.

[0015] By adopting the above technical solution, the two contact fingers are positioned near the cover plate to effectively prevent the moving contact assembly from contacting the first stationary contact pieces on both sides of the base chamber at the same time, thereby effectively preventing short circuits and improving safety during use.

[0016] Optionally, the contact points of the two clips are bent to opposite sides.

[0017] By adopting the above technical solution, the contact between the moving contact assembly and the stationary contact is made tighter and more secure, ensuring that the connection between the contact finger and the stationary contact is not easily loosened during the connection process, thereby improving the stability and reliability of the contact.

[0018] Optionally, an arc-extinguishing guide plate is provided on the opposite side of the two clamping plates.

[0019] By adopting the above technical solution, the arc-extinguishing conductor is generally made of a material with good electrical and thermal conductivity. During the circuit switching process, the arc-extinguishing conductor set on the opposite side of the clamp can provide a relatively low-resistance path for the arc, which helps to guide the arc current and thus reduce the duration of the arc to a certain extent. At the same time, the arc-extinguishing conductor can absorb and dissipate some of the heat generated by the arc, thereby reducing the arc temperature, accelerating the extinguishing of the arc, and thus improving the safety during circuit switching.

[0020] Optionally, the cross-section of the control axis is polygonal.

[0021] By adopting the above technical solution, the polygonal structure has multiple sides and corners. This structure makes the contact area between the control shaft and the moving contact assembly larger, the connection tighter and more stable, and can effectively prevent the moving contact assembly from loosening or shifting during operation, thereby improving the operational reliability of the disconnecting switch.

[0022] In summary, this application has the following beneficial effects:

[0023] 1. By opening multiple chambers and setting partitions between the chambers, adjacent chambers are effectively separated, ensuring insulation isolation between adjacent chambers. This effectively reduces interference caused by electromagnetic coupling between adjacent circuits, avoids arc interference, ensures current stability, and improves stability and safety.

[0024] 2. By setting an arc-extinguishing guide plate on the opposite side of the clamp, the arc current can be effectively guided during the circuit switching process, thereby reducing the duration of the arc; and the arc-extinguishing guide plate absorbs and dissipates some of the heat generated by the arc, thereby reducing the arc temperature, accelerating the arc extinguishing, and improving the safety during circuit switching. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the disconnecting switch according to an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the cover plate according to an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the structure of the base according to an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the internal structure of the disconnecting switch according to an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the structure of the moving contact assembly according to an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Base; 11. First stationary contact piece; 12. Limiting block; 2. Cover plate; 21. Second stationary contact piece; 3. Chamber; 31. Partition plate; 311. Positioning groove; 312. Groove; 4. Control shaft; 41. Positioning ring; 5. Moving contact piece assembly; 51. Jacket; 511. Rotating part; 52. Clamping piece; 521. Contact finger; 53. Arc extinguishing guide piece. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0032] This application discloses an isolating switch. (Refer to...) Figure 1 , Figure 2 and Figure 3 The disconnect switch includes a base 1 and a cover plate 2. Both the base 1 and the cover plate 2 have several chambers 3. First stationary contacts 11 are located at both ends of each chamber 3 in the base 1. A second stationary contact 21 is fixedly connected to the middle of each chamber 3 in the cover plate 2. A control shaft 4 passes through the base 1, and a moving contact assembly 5 is sleeved on the surface of the control shaft 4. The moving contact assembly 5 corresponds one-to-one with each chamber 3. By rotating the control shaft 4, the moving contact assembly 5 rotates, causing it to contact the first stationary contact 11 and the second stationary contact 21 at one end of the base 1, thus connecting the circuit. By changing the rotation direction of the control shaft 4, the moving contact assembly 5 contacts the first stationary contacts 11 on both sides of the base 1, thereby achieving the circuit switching function.

[0033] Reference Figure 1 The control shaft 4 has a polygonal cross-section. The polygonal structure has multiple sides and corners, which increases the contact area between the control shaft 4 and the moving contact assembly 5, resulting in a tighter and more stable connection. This effectively prevents the moving contact assembly 5 from loosening or shifting during operation, improving the operational reliability of the disconnect switch. In this embodiment, the control shaft 4 has a quadrilateral cross-section; in other embodiments, the control shaft 4 can also be triangular, hexagonal, or other shapes. Comparatively, a quadrilateral control shaft 4 is easier to align and install with the moving contact assembly 5, and effectively prevents relative rotation between the control shaft 4 and the moving contact assembly 5.

[0034] Reference Figure 1 , Figure 2 and Figure 3 Limiting blocks 12 are provided on both sides of the cavity 3 of the base 1 near the first stationary contact piece 11. When the control shaft 4 drives the moving contact piece assembly 5 to rotate, the limiting blocks 12 can contact the moving contact piece assembly 5 to prevent the moving contact piece assembly 5 from disconnecting from the first stationary contact piece 11 and the second stationary contact piece 21 due to excessive rotation angle, thereby preventing circuit breakage, ensuring the stability and controllability of the connection process, and improving the safety of use.

[0035] Reference Figure 3 , Figure 4 A partition plate 31 is provided between two adjacent chambers 3. A positioning ring 41 is sleeved on the control shaft 4. The partition plate 31 has a positioning groove 311 for the positioning ring 41 to engage. The positioning ring 41 and the moving contact assembly 5 are alternately arranged. This allows each moving contact assembly 5 to be stably fixed in a separate chamber 3, thereby effectively reducing interference between adjacent circuits. Furthermore, the positioning ring 41, in conjunction with the partition plate 31, allows the chamber 3 to be completely sealed, thereby effectively separating the chambers 3 and ensuring insulation isolation between adjacent chambers 3. This reduces the possibility of mutual current interference within adjacent chambers 3 and ensures reliable circuit control.

[0036] Reference Figure 3 , Figure 4 and Figure 5 The movable contact assembly 5 includes a sleeve 51 that fits onto the control shaft 4 and two clamping pieces 52 disposed within the sleeve 51. Rotating portions 511 are provided on both sides of the sleeve 51, and a groove 312 is provided on the partition plate 31 for the rotating portions 511 to rotate. The groove 312 is arc-shaped, providing a smooth guiding surface for the rotating portions 511, thereby facilitating the rotation of the movable contact assembly 5 by the control shaft 4 and improving the stability during circuit switching.

[0037] Reference Figure 4 , Figure 5 The clip 52 is provided with two contact fingers 521, both of which are located near the cover plate 2. The two clips 52 bend towards each other at the middle of the contact fingers 521 on the same side. The placement of the two contact fingers 521 near the cover plate 2 on a single clip 52 effectively prevents simultaneous contact between the moving contact assembly 5 and the first stationary contact pieces 11 on both sides of the base 1 chamber 3, thus preventing short circuits and improving safety during use. The bending of the contact fingers 521 towards each other ensures that when the circuit is open, the contact fingers 521, through their elastic deformation, always apply a certain pressure to the stationary contact pieces, resulting in a tighter contact between the moving contact assembly 5 and the stationary contact pieces. Furthermore, in some operating environments, the contact pieces may wear, and the contact pieces and other components may undergo dimensional changes due to temperature variations, long-term wear, etc. The elasticity of the bent contact fingers 521 can compensate for these changes to a certain extent, thereby maintaining a stable connection and ensuring the reliability and stability of the contact.

[0038] Reference Figure 5An arc-extinguishing guide plate 53 is provided on the opposite side of the clamp 52. During circuit switching, the arc-extinguishing guide plate 53 on the opposite side of the clamp 52 can effectively guide the arc current, thereby reducing the arc duration to a certain extent; at the same time, the arc-extinguishing guide plate 53 can quickly conduct and dissipate the heat generated by the arc, reducing the arc temperature and accelerating the arc cooling rate. This helps to shorten the arc duration, improve arc extinguishing efficiency, and thus improve safety during circuit switching. In this embodiment, the arc-extinguishing guide plate 53 is a copper sheet; in other embodiments, the arc-extinguishing guide plate 53 can also be made of zinc sheet or other materials. Compared with copper sheet, copper sheet has better thermal conductivity and electrical conductivity, can form a protective oxide film at room temperature, has better corrosion resistance, can remain stable in harsh environments, and extend the service life of the arc-extinguishing guide plate 53.

[0039] The implementation principle of the disconnecting switch in this application embodiment is as follows: rotating the control shaft 4 causes the moving contact assembly 5 to rotate, and the contact pin on the moving contact assembly 5 contacts the first stationary contact 11 and the second stationary contact 21, thereby realizing the opening and closing of the circuit. Multiple chambers 3 are provided inside the base 1 and the cover plate 2. The moving contact assembly 5 is closed and opened in a separate chamber 3, thereby effectively reducing the interference between adjacent circuits and ensuring current stability.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A disconnector comprising a base (1) and a cover (2), characterized in that: The base (1) and the cover plate (2) are internally provided with a plurality of cavities (3), the cavities (3) of the base (1) are provided with first static contact pieces (11) at both ends, the cavities (3) of the cover plate (2) are fixedly connected with second static contact pieces (21) at the middle, the base (1) is provided with a control shaft (4), the control shaft (4) is fixedly connected with a moving contact piece assembly (5), the moving contact piece assembly (5) corresponds to the cavities (3) one by one, the moving contact piece assembly (5) comprises a clamping sleeve (51) sleeved on the control shaft (4) and a clamping piece (52) arranged in the clamping sleeve (51), and adjacent two cavities (3) are provided with a partition plate (31).

2. The disconnector according to claim 1, characterized in that: The control shaft (4) is sleeved with a positioning ring (41), the positioning ring (41) and the moving contact piece assembly (5) are alternately sleeved on the control shaft (4), and the partition plate (31) is provided with a positioning groove (311) for clamping the positioning ring (41).

3. The disconnector according to claim 1, characterized in that: The clamping sleeve (51) is provided with rotating portions (511) at both sides, the partition plate (31) is provided with a groove (312) for rotating the rotating portions (511), and the groove body of the groove (312) is in an arc shape.

4. The disconnector according to claim 1, characterized in that: The cavities (3) of the base (1) are provided with limiting blocks (12) near both sides of the first static contact pieces (11).

5. The disconnector according to claim 1, characterized in that: Each moving contact piece assembly (5) is provided with two clamping pieces (52), each clamping piece (52) is provided with two contact fingers (521), and the two contact fingers (521) are arranged on the side close to the cover plate (2).

6. The disconnector according to claim 5, characterized in that: The contact fingers (521) of the two clamping pieces (52) are curved towards the opposite side.

7. The disconnector according to claim 5, characterized in that: The two clamping pieces (52) are provided with arc extinguishing guide pieces (53) on the opposite side.

8. The disconnector according to claim 1, characterized in that: The control shaft (4) is in a polygonal shape in cross section.

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