A high current three-phase disconnector

Abstract

The utility model relates to a kind of three-phase disconnecting switch of large current, including shell and handle, the handle is hingedly located on shell, and rotate relative to shell, shell is separated into three active areas by two partitions, each active area is equipped with moving contact and static contact, contact support is further equipped in shell, contact support is located between each moving contact and handle, and respectively with each moving contact and handle abutment setting, during handle rotates along first direction, contact support axially slides in shell and drives moving contact synchronous sliding, to realize the separation of moving contact and static contact, the first reset spring is further equipped in shell corresponding each moving contact position, to drive moving contact to slide up and contact with static contact during handle rotates along second direction opposite to first direction.Using the above technical scheme, the utility model provides a kind of three-phase disconnecting switch of large current, drives three groups of contact linkage by a handle, structure is simple, and it is easy to operate, and it is more convenient to assemble.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, and in particular to a high-current three-phase disconnecting switch. Background Technology

[0002] Currently, disconnect switches used in three-phase systems fall into two categories. One type consists of three single-pole products linked together to form a three-phase product. This type of assembly involves three operating mechanisms, resulting in some error in the operating stroke and poor synchronization of the three-phase contacts. The other type is a multi-link transmission three-phase disconnect switch driven by a single handle that moves three sets of contacts. This type has a complex structure, is bulky, and is inconvenient to assemble. Utility Model Content

[0003] The purpose of this utility model is to overcome the defects of the prior art by providing a high-current three-phase disconnect switch that drives three sets of contacts in linkage through a handle. It has a simple structure, is easy to operate, and is also more convenient to assemble.

[0004] The technical solution of this utility model is as follows: A high-current three-phase disconnecting switch includes a housing and a handle. The handle is hinged to the housing and rotates relative to the housing. The housing is divided into three movable areas by two partitions. Each movable area is provided with a moving contact and a stationary contact. The stationary contact in each group is located above the corresponding moving contact. A contact support is also provided inside the housing. The contact support is located between each moving contact and the handle, and is respectively abutted against each moving contact and the handle. During the rotation of the handle in a first direction, the contact support slides axially within the housing and drives the moving contact to slide synchronously, thereby achieving separation of the moving and stationary contacts. A first return spring is also provided inside the housing corresponding to each moving contact position, so as to drive the moving contact to slide upward and contact the stationary contact during the rotation of the handle in a second direction opposite to the first direction.

[0005] By adopting the above technical solution, the structural layout of the three-phase disconnect switch is optimized, making the overall structure simple and easy to assemble. When the handle is turned, the moving contacts can be driven to slide simultaneously through the contact support to achieve contact or separation of the moving and stationary contacts. This simplifies the driving structure between the handle and the moving contacts without affecting the normal operation of the three-phase disconnect switch. When the handle is turned, the contact support pushes against the moving contact to overcome the reaction force of the first reset spring and moves downward. When the handle is turned to the final position, the moving and stationary contacts are completely separated and the switch is in the open state. When the handle is turned in the opposite direction to a certain position, under the elastic force of the first reset spring, the moving contact and the contact support are instantly reset and the switch is in the closed state.

[0006] Further features of this invention: Each active area is provided with two terminal blocks and two moving contact bridges. The two terminal blocks are located at both ends of the moving contact bridge, and each terminal block is provided with two stationary contacts at the end closest to the moving contact bridge. Both ends of each moving contact bridge are provided with the moving contacts. The upper surface of each moving contact bridge is configured to abut against the contacts and slide synchronously with the contacts.

[0007] With the above-mentioned further configuration, the separate moving contact design makes the current carrying more balanced and effectively reduces the temperature rise.

[0008] A further feature of this invention is that the moving contact bridge includes an inverted U-shaped contact plate and mounting plates located at both ends of the contact plate. The contact plate and the two mounting plates are integrally formed. The two mounting plates are inclined and form an angle of 110° to 120° with the contact plate. The moving contact is provided on both mounting plates, and the contact is supported and abutted against the upper surface of the contact plate.

[0009] A further feature of this invention is that each terminal block includes an integrally formed first plate and a second plate. The first plate is inclined at one end of the second plate near the moving contact bridge, and the angle between the first plate and the second plate is 150-160°. The stationary contact is located on the second plate.

[0010] With the above-mentioned further design, the moving contact bridge is arranged in a Z-shape, which makes the structure between the contact support and the moving contact bridge more stable and allows for better synchronous sliding between the two. At the same time, the inclined arrangement of the mounting plate and the first plate ensures uniform contact pressure between the contacts. A reasonable inclination angle can improve the conductivity of the contacts, enhance the reliability of the switch, and reduce premature wear.

[0011] A further feature of this invention is that the second plate is fixedly mounted on the housing by fasteners, the end of the second plate away from the first plate extends outside the housing, and a through hole is provided on the portion of the second plate outside the housing.

[0012] By adopting the above-mentioned further configuration, the terminal block is stably mounted on the housing, and the second plate extends outside the housing to form a terminal block, which facilitates wiring.

[0013] A further feature of this invention is that: a recessed mounting cavity is provided below the contact support corresponding to each active area position, and the two moving contact bridges in each active area are located in the mounting cavity. A partition rib is provided on the inner side wall of each mounting cavity, and the two moving contact bridges in the same active area are located on both sides of the partition rib.

[0014] With the above-mentioned further configuration, the partition rib can restrict the sliding direction of the moving contact bridge, so that the moving contact and the stationary contact are always aligned and can make accurate contact when closing. The lower end face of the mounting cavity is inclined and contacts the mounting plate, which better drives the moving contact bridge to slide synchronously when the contact supports downward sliding, and also better drives the contact to support synchronous sliding when the moving contact bridge slides upward.

[0015] A further feature of this invention is that a receiving cavity with a lower opening is provided between two adjacent mounting cavities, and each receiving cavity has a sliding groove at both ends. The partition plate is arranged opposite to the sliding groove, and the partition plate and the sliding groove guide and slide together when the contact supports axial sliding.

[0016] With the above-mentioned further configuration, the sliding groove and the partition guide sliding cooperation make the contact support structurally stable during sliding, and after the contact support slides down, it can separate the moving contact bridge in the two active areas and block the electrical breakdown between adjacent two phase poles.

[0017] A further feature of this invention is that the upper surface of the contact support is provided with an arc-shaped protrusion, and the handle is provided with an arc-shaped groove, the arc-shaped groove being adapted to the arc-shaped protrusion.

[0018] With the above-mentioned further configuration, there are two arc-shaped grooves. One of them cooperates with the arc-shaped protrusion when the switch is closed, and the other cooperates with the arc-shaped protrusion when the switch is open. The protrusion is arc-shaped, which makes it easier for the handle to disengage from the current arc-shaped groove and enter the other arc-shaped groove when it is turned.

[0019] A further improvement of this invention is that each active area is provided with a positioning post, the first return spring is sleeved on the positioning post, and the upper end of the first return spring abuts against the corresponding moving contact bridge to drive the moving contact bridge to slide and cause the moving contact to contact the stationary contact.

[0020] With the above-mentioned further configuration, the first reset spring structure is stable, ensuring that the moving contact bridge slides upward stably without deviating when resetting the moving contact bridge.

[0021] A further feature of this invention is that a second reset spring for supporting the reset contact is provided between the accommodating cavity and the partition plate, and a mounting post is provided on the partition plate. The second reset spring is sleeved on the mounting post, and its upper end abuts against the top wall of the accommodating cavity.

[0022] With the above-mentioned further configuration, the second return spring has a stable mounting structure, better drives the contact support to return to its original position, and the force of the second return spring is transmitted to the handle through the contact support, so that after the handle is rotated to the position, the contact support abuts against the handle without any gap between them, and the handle structure is stable and does not wobble. Attached Figure Description

[0023] Figure 1This is a schematic diagram of a specific embodiment of the present utility model; Figure 2 This is an exploded view of a specific embodiment of the present utility model; Figure 3 This is an internal schematic diagram of a specific embodiment of the present utility model; Figure 4 This is a schematic diagram showing the positions of the moving contact bridge and the terminal block in a specific embodiment of this utility model; Figure 5 This is a cross-sectional view of a specific embodiment of the present utility model; Figure 6 This is a schematic diagram of the contact support in a specific embodiment of the present utility model; Figure 7 This is a schematic diagram of the upper mounting cavity for the contact support in a specific embodiment of the present utility model; Figure 8 This is a schematic diagram of the moving contact bridge according to a specific embodiment of the present invention; Figure 9 This is a schematic diagram of a wiring board according to a specific embodiment of the present utility model; Figure 10 This is a schematic diagram of the active area in a specific embodiment of the present utility model; Figure 11 This is a schematic diagram of the handle in a specific embodiment of the present invention.

[0024] In the diagram, 1. Housing; 11. Partition plate; 111. Mounting post; 12. Moving area; 13. First return spring; 14. Positioning post; 2. Handle; 21. Arc groove; 3. Moving contact bridge; 31. Moving contact; 32. Abutment plate; 33. Mounting plate; 4. Wiring plate; 41. Stationary contact; 42. First plate; 43. Second plate; 431. Through hole; 5. Contact support; 51. Mounting cavity; 511. Separating rib; 52. Arc protrusion; 53. Guide groove; 6. Receiving cavity; 61. Slide groove; 7. Second return spring. Detailed Implementation

[0025] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] It should be noted that all directional indicators (such as up, down, forward, backward, etc.) in the description of this utility model are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] like Figure 1-11 As shown, a high-current three-phase disconnecting switch includes a housing 1 and a handle 2. The handle 2 is hinged to the housing 1 and rotates relative to the housing 1. The housing 1 is divided into three movable areas 12 by two partitions 11. Each movable area 12 is provided with a moving contact 31 and a stationary contact 41. In each group, the stationary contact 41 is located above the corresponding moving contact 31. The housing 1 also provides a contact support 5, which is located between each moving contact 31 and the handle 2, and is respectively abutted against each moving contact 31 and the handle 2. During the rotation of the handle 2 in a first direction, the contact support 5 slides axially within the housing 1 and drives the moving contact 31 to slide synchronously, so as to realize the separation of the moving contact 31 and the stationary contact 41. The housing 1 is also provided with a first return spring 13 corresponding to each moving contact 31, so as to release the handle 2 when it rotates in the first direction. During the rotation in the opposite second direction, the moving contact 31 is driven to slide upward and contact the stationary contact 41, optimizing the structural layout of the three-phase disconnect switch, making the overall structure simple and easy to assemble. When the handle 2 is rotated, the contact support 5 can simultaneously drive each moving contact 31 to slide, so as to achieve contact or separation of the moving and stationary contacts 41, simplifying the drive structure between the handle 2 and the moving contact 31, but without affecting the normal operation of the three-phase disconnect switch. When the handle 2 is rotated, the contact support 5 pushes against the moving contact 31 to overcome the reaction force of the first reset spring 13 and move downward. When the handle 2 is rotated to the final position, the moving and stationary contacts 41 are completely separated and the switch is in the open state. When the handle 2 is rotated to a certain position in the opposite direction, under the elastic force of the first reset spring 13, the moving contact 31 and the contact support 5 are instantly reset and the switch is in the closed state.

[0030] Each active area 12 is equipped with two terminal blocks 4 and two moving contact bridges 3. The two terminal blocks 4 are located at both ends of the moving contact bridge 3, and each terminal block 4 has two stationary contacts 41 at the end closest to the moving contact bridge 3. Each moving contact bridge 3 has moving contacts at both ends. The upper surface of each moving contact bridge 3 is set to abut against the contact support 5 and slides synchronously with the contact support 5. The separate moving contact 31 makes the current carrying more balanced and effectively reduces the temperature rise. Each active area 12 is equipped with a positioning post 14. The first return spring 13 is sleeved on the positioning post 14, and the upper end of the first return spring 13 abuts against the corresponding moving contact bridge 3 to drive the moving contact bridge 3 to slide and make the moving contact 31 contact the stationary contact 41. The first return spring 13 has a stable structure and ensures that the moving contact bridge 3 slides upward stably without deviating when resetting the moving contact bridge 3.

[0031] The moving contact bridge 3 includes an inverted U-shaped contact plate 32 and mounting plates 33 located at both ends of the contact plate 32. The contact plate 32 and the two mounting plates 33 are integrally formed. The two mounting plates 33 are inclined and the included angle between them and the contact plate 32 is 110~120°, preferably 115°. Each mounting plate 33 is provided with a moving contact 31, and the contact support 5 is abutted against the upper end surface of the contact plate 32. Each wiring board 4 includes an integrally formed first plate body 42 and a second plate body 43. The first plate body 42 is inclined. The stationary contact 41 is located on the second plate 43 near the moving contact bridge 3, with an angle of 150-160° between the stationary contact 41 and the moving contact bridge 3, preferably 155°. The stationary contact 41 is located on the second plate 43, and the moving contact bridge 3 is arranged in a Z-shape, which makes the structure between the contact support 5 and the moving contact bridge 3 more stable and allows for better synchronous sliding between the two. At the same time, the mounting plate 33 and the first plate 42 are inclined to make the contact pressure between the contacts uniform. A reasonable tilt angle can improve the conductivity of the contacts, enhance the reliability of the switch, and reduce premature wear.

[0032] The second plate 43 is fixedly installed on the housing 1 by fasteners. The end of the second plate 43 away from the first plate 42 extends to the outside of the housing 1, and the part of the second plate 43 located outside the housing 1 is provided with a through hole 431, so that the terminal block 4 is stably set on the housing 1. The second plate 43 extends to the outside of the housing 1 to form a terminal block, which facilitates wiring.

[0033] The contact support 5 has a recessed mounting cavity 51 below each active area 12. The two moving contact bridges 3 in each active area 12 are located in the mounting cavity 51. The inner sidewall of each mounting cavity 51 is provided with a partition rib 511. The two moving contact bridges 3 in the same active area 12 are located on both sides of the partition rib 511. The partition rib 511 can restrict the sliding direction of the moving contact bridge 3, so that the moving contact 31 and the stationary contact 41 are always aligned and can make accurate contact when closing. The lower end face of the mounting cavity 51 is inclined and contacts the mounting plate 33. When the contact support 5 slides down, it better drives the moving contact bridge 3 to slide synchronously. When the moving contact bridge 3 slides up, it also better drives the contact support 5 to slide synchronously.

[0034] Between two adjacent mounting cavities 51, there is a receiving cavity 6 with an opening at the bottom. Each receiving cavity 6 has a sliding groove 61 at both ends. A partition plate 11 is positioned opposite to the sliding groove 61. When the contact support 5 slides axially, the partition plate 11 and the sliding groove 61 slide in a guiding manner, ensuring the contact support 5 remains structurally stable during sliding. Furthermore, after the contact support 5 slides downwards, it can separate the moving contact bridges 3 within the two active areas 12, preventing electrical breakdown between adjacent phase poles. A second cavity 6 is provided between the receiving cavity 6 and the partition plate 11 for resetting the contact support 5. The second return spring 7 is sleeved on the mounting post 111 on the partition plate 11, with its upper end abutting against the top wall of the accommodating cavity 6. The second return spring 7 has a stable installation structure, which better drives the contact 31 to support the return position. The force of the second return spring 7 is transmitted to the handle 2 through the contact support 5, so that after the handle 2 is rotated to the position, the contact support 5 abuts against the handle 2 without any gap between them. The handle 2 is structurally stable and does not wobble. The contact support 5 is also provided with a guide groove 53, which cooperates with the housing 1 for guide sliding, making the structure more stable when sliding.

[0035] The upper surface of the contact support 5 is provided with an arc-shaped protrusion 52, and the handle 2 is provided with an arc-shaped groove 21. The arc-shaped groove 21 is adapted to the arc-shaped protrusion 52. There are two arc-shaped grooves 21. One of them cooperates with the arc-shaped protrusion 52 when the switch is closed, and the other cooperates with the arc-shaped protrusion 52 when the switch is open. The protrusion is arc-shaped, so that the handle 2 can more smoothly disengage from the current arc-shaped groove 21 and enter the other arc-shaped groove 21 when it rotates.

Claims

1. A high-current three-phase disconnect switch, comprising a housing (1) and a handle (2), wherein the handle (2) is hinged to the housing (1) and rotates relative to the housing (1), characterized in that, The housing (1) is divided into three active areas (12) by two partitions (11). Each active area (12) is provided with a moving contact (31) and a stationary contact (41). The stationary contact (41) in each group is located above the corresponding moving contact (31). The housing (1) is also provided with a contact support (5). The contact support (5) is located between each moving contact (31) and the handle (2), and is respectively abutted against each moving contact (31) and the handle (2). During the rotation of the handle (2) in the first direction, the contact support (5) slides axially in the housing (1) and drives the moving contact (31) to slide synchronously, so as to realize the separation of the moving contact (31) and the stationary contact (41). The housing (1) is also provided with a first return spring (13) corresponding to each moving contact (31) so as to drive the moving contact (31) to slide upward and contact the stationary contact (41) during the rotation of the handle (2) in the second direction opposite to the first direction.

2. The high-current three-phase disconnect switch according to claim 1, characterized in that, Each activity area (12) is provided with two terminal blocks (4) and two moving contact bridges (3). The two terminal blocks (4) are located at both ends of the moving contact bridge (3). Each terminal block (4) is provided with two stationary contacts (41) at the end near the moving contact bridge (3). Each moving contact bridge (3) is provided with the moving contacts (31) at both ends. The upper surface of each moving contact bridge (3) is set to abut against the contact support (5) and slides synchronously with the contact support (5).

3. The high-current three-phase disconnect switch according to claim 2, characterized in that, The moving contact bridge (3) includes an inverted U-shaped contact plate (32) and mounting plates (33) located at both ends of the contact plate (32). The contact plate (32) and the two mounting plates (33) are integrally formed. The two mounting plates (33) are inclined and the included angle between them and the contact plate (32) is 110~120°. The moving contact (31) is provided on both mounting plates (33). The contact support (5) is abutted against the upper end surface of the contact plate (32).

4. The high-current three-phase disconnect switch according to claim 2 or 3, characterized in that, Each terminal block (4) includes an integrally formed first plate (42) and a second plate (43). The first plate (42) is inclined at one end of the second plate (43) near the moving contact bridge (3) and the angle between the first plate (42) and the second plate (43) is 150~160°. The stationary contact (41) is located on the second plate (43).

5. The high-current three-phase disconnect switch according to claim 4, characterized in that, The second plate (43) is fixedly installed on the housing (1) by fasteners. The end of the second plate (43) away from the first plate (42) extends to the outside of the housing (1), and the part of the second plate (43) located outside the housing (1) is provided with a through hole (431).

6. The high-current three-phase disconnect switch according to claim 3, characterized in that, The contact support (5) has a recessed mounting cavity (51) below each active area (12). The two movable contact bridges (3) in each active area (12) are located in the mounting cavity (51). The inner sidewall of each mounting cavity (51) is provided with a partition rib (511). The two movable contact bridges (3) in the same active area (12) are located on both sides of the partition rib (511).

7. The high-current three-phase disconnect switch according to claim 6, characterized in that, Between two adjacent mounting cavities (51), there is a receiving cavity (6) with an opening at the bottom. Each receiving cavity (6) has a sliding groove (61) at both ends. The partition (11) is arranged opposite to the sliding groove (61), and when the contact support (5) slides axially, the partition (11) and the sliding groove (61) guide and slide together.

8. The high-current three-phase disconnect switch according to claim 6, characterized in that, The upper surface of the contact support (5) is provided with an arc-shaped protrusion (52), and the handle (2) is provided with an arc-shaped groove (21), which is adapted to the arc-shaped protrusion (52).

9. The high-current three-phase disconnect switch according to claim 2, characterized in that, Each activity area (12) is provided with a positioning post (14). The first return spring (13) is sleeved on the positioning post (14), and the upper end of the first return spring (13) abuts against the corresponding moving contact bridge (3) to drive the moving contact bridge (3) to slide and cause the moving contact (31) to contact the stationary contact (41).

10. The high-current three-phase disconnect switch according to claim 7, characterized in that, A second reset spring (7) for resetting contact support (5) is provided between the accommodating cavity (6) and the partition (11). A mounting post (111) is provided on the partition (111). The second reset spring (7) is sleeved on the mounting post (111) and its upper end abuts against the top wall of the accommodating cavity (6).

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