Dual-power change-over switch

Abstract

The utility model provides a dual power supply change-over switch, comprising a housing, the housing comprises an upper cover and a pedestal which are arranged up and down, the upper cover and the pedestal enclose to form a cavity, the cavity is provided with a plurality of contact zone grooves arranged at intervals along the length direction of the housing and arc isolation structures arranged between two adjacent contact zone grooves, and the contact zone grooves are internally provided with static contacts and moving contacts; the arc isolation structure comprises a first partition plate extending downwards from the top face of the upper cover and a second partition plate extending upwards from the base and arranged corresponding to the first partition plate, convex ribs are arranged at the bottom of the first partition plate, and inserting grooves in interference fit with the convex ribs are formed in the top of the second partition plate. Therefore, the inter-phase creepage distance is increased, the condition of inter-phase short circuit caused by the fact that electric arcs run into the adjacent contact area grooves is avoided, the insulation performance is better, the reliability is improved, and the service life of the product is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to a dual power conversion switch. Background Art

[0002] Dual power transfer switches are mainly used in emergency power supply systems. When the normal power suddenly fails or there is a power outage, the dual power transfer switch will automatically switch to the backup power supply to ensure that the equipment can still operate normally.

[0003] When the switch contacts of the existing dual power conversion switch are subjected to large current (such as 630A frame and above) connection and disconnection tests, the arc energy generated is large, which will burn the contacts. The large amount of metal ions ejected from the contacts can easily lead to phase short circuits, thereby reducing reliability and shortening the service life of the product. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect of the dual power supply switch in the prior art that it is easy to short-circuit between phases, thereby providing a dual power supply switch with good insulation and high reliability.

[0005] To this end, the utility model provides a dual power conversion switch, including a shell and an arc isolation structure, the shell including an upper cover and a base arranged up and down, the upper cover and the base enclose a cavity, the cavity has a plurality of contact area grooves arranged at intervals along the length direction of the shell, and an arc isolation structure arranged between two adjacent contact area grooves, wherein a static contact and a moving contact are installed in the contact area grooves; the arc isolation structure includes a first partition extending downward from the top surface of the upper cover, and a second partition extending upward from the base and arranged corresponding to the first partition, wherein a convex rib is provided at the bottom of the first partition, and a slot with an interference fit with the convex rib is provided at the top of the second partition.

[0006] The stationary contact comprises a wiring portion, a mounting portion, a connecting portion and a contact blade portion which are connected in sequence. The mounting portion is fixed to the connecting portion by screws, and a clamping structure suitable for clamping the connecting portion is provided inside the housing.

[0007] The clamping structure comprises a first clamping plate disposed on the base and abutting against the bottom surface of the connecting portion, and a second clamping plate disposed on the upper cover and abutting against the top surface of the connecting portion.

[0008] It also includes a contact support slidably installed in the middle of the shell, and a positioning structure is provided on the contact support and the inner wall of the shell, and the positioning structure includes: a first positioning groove and a second positioning groove, which are respectively arranged on both sides of the length direction of the upper cover; a third positioning groove and a fourth positioning groove, which are respectively arranged on both sides of the length direction of the base, the third positioning groove is the same size as the first positioning groove, and is correspondingly arranged up and down, and the fourth positioning groove is the same size as the second positioning groove, and is correspondingly arranged up and down; two first positioning ribs are respectively arranged on one side of the contact support and extend into the corresponding first positioning groove and third positioning groove respectively; two second positioning ribs are respectively arranged on the other side of the contact support and extend into the corresponding second positioning groove and fourth positioning groove respectively; wherein, when the contact support is in the opening position, the two first positioning ribs are simultaneously against the inner walls of the first positioning groove and the third positioning groove; when the contact support is in the closing position, the two second positioning ribs are simultaneously against the inner walls of the second positioning groove and the fourth positioning groove.

[0009] A contact support and an operating mechanism for driving the contact support to move are installed on the shell, and the operating mechanism includes a driving plate that rotates around a mounting axis and is connected to the contact support. The top surface of the upper cover is formed with a mounting column suitable for inserting the mounting axis, and a plurality of reinforcing ribs arranged at intervals along the circumference of the mounting column.

[0010] A boss corresponding to the mounting column is formed on the inner wall of the upper cover.

[0011] The side wall of the upper cover is provided with an exhaust groove corresponding to the contact area groove.

[0012] The technical solution of the utility model has the following advantages:

[0013] 1. The dual power conversion switch provided by the utility model has a first partition extending downwardly arranged on the top surface of the upper cover, a second partition extending upwardly arranged corresponding to the first partition is arranged on the base, a convex rib is arranged at the bottom of the first partition, and a slot with an interference fit with the convex rib is arranged at the top of the second partition, thereby increasing the phase creepage distance, thereby preventing the arc from running into the adjacent contact area slot to cause a phase short circuit, and having better insulation performance, improving reliability, and extending the service life of the product.

[0014] 2. The dual power conversion switch provided by the utility model has a clamping structure including a first clamping plate provided on the base and abutting against the bottom surface of the connecting part, and an L-shaped second clamping plate provided on the upper cover and abutting against the top surface of the connecting part. The first clamping plate and the second clamping plate can clamp the static contact up and down, thereby reducing the up and down swing of the static contact caused by the impact when closing the switch, thereby improving reliability.

[0015] 3. The dual power conversion switch provided by the utility model has a first positioning groove and a second positioning groove on both sides of the length direction of the upper cover, and a third positioning groove and a fourth positioning groove on both sides of the length direction of the base. When the contact support is in the open position, the two first positioning ribs simultaneously abut against the inner walls of the first positioning groove and the third positioning groove; when the contact support is in the closed position, the two second positioning ribs simultaneously abut against the inner walls of the second positioning groove and the fourth positioning groove. In this way, in the open position and the closed position, the upper cover and the base are simultaneously impacted by the contact support, avoiding the situation where a single part is impacted for a long time and then misaligned up and down.

[0016] 4. The dual power conversion switch provided by the utility model has a top surface of the upper cover formed with a mounting column suitable for inserting the mounting shaft, and a plurality of reinforcing ribs arranged at intervals along the circumference of the mounting column, and an inner wall of the upper cover is formed with a boss arranged corresponding to the mounting column, and the reinforcing ribs and the boss increase the structural strength of the hole and improve reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a dual power conversion switch of the utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the AA part;

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the middle BB part;

[0021] Figure 4 It is a schematic diagram of the assembly of the moving contact, the stationary contact and the base;

[0022] Figure 5 A three-dimensional diagram of the base;

[0023] Figure 6 is a first stereoscopic view of the upper cover;

[0024] Figure 7 This is a second stereoscopic view of the upper cover.

[0025] Explanation of the accompanying drawings: 1. Shell; 2. Upper cover; 3. Base; 4. Contact zone groove; 5. Static contact; 6. Moving contact; 7. First partition; 8. Second partition; 9. Protruding rib; 10. Slot; 11. Wiring portion; 12. Mounting portion; 13. Connecting portion; 14. Knife contact portion; 151. First clamping plate; 152. Second clamping plate; 16. Contact support; 17. First positioning rib; 18. Second positioning rib; 19. Mounting shaft; 20. Drive plate; 21. First positioning groove; 22. Second positioning groove; 23. Third positioning groove; 24. Fourth positioning groove; 25. Mounting column; 26. Reinforcing rib; 27. Boss; 28. Exhaust groove. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Example

[0031] This embodiment provides a dual power conversion switch, such as Figure 2 As shown, it includes a shell 1, and the shell 1 includes an upper cover 2 and a base 3 arranged up and down.

[0032] The upper cover 2 and the base 3 enclose a cavity, such as Figure 2 As shown, the mold cavity has a plurality of contact zone slots 4 arranged at intervals along the length direction of the housing 1, and an arc isolation structure arranged between two adjacent contact zone slots 4, wherein the static contact 5 and the moving contact 6 are installed in the contact zone slots 4, and the arc isolation structure comprises a first partition plate 7 extending downward from the top surface of the upper cover 2, and a second partition plate 8 extending upward from the base 3 and arranged corresponding to the first partition plate 7, wherein the bottom of the first partition plate 7 is provided with a convex rib 9, and the top of the second partition plate 8 is provided with a slot 10 which is interference fit with the convex rib 9. Figure 6 As shown, an exhaust groove 28 is provided on the side wall of the upper cover 2 corresponding to the contact area groove 4 , and the exhaust groove 28 is provided adjacent to the stationary contact 5 .

[0033] Stationary contact 5, such as Figure 4 As shown, it comprises a wiring portion 11, a mounting portion 12, a connecting portion 13 and a knife contact portion 14 which are connected in sequence, the mounting portion 12 is fixed to the connecting portion 13 by screws, and a clamping structure suitable for clamping the connecting portion 13 is provided inside the housing 1, as shown in FIG. Figure 5 and Figure 6 As shown, the clamping structure includes a first clamping plate 151 disposed on the base 3 and abutting against the bottom surface of the connecting portion 13 , and an L-shaped second clamping plate 152 disposed on the upper cover 2 and abutting against the top surface of the connecting portion 13 .

[0034] A contact support 16 is slidably mounted in the middle of the housing 1, and a positioning structure is provided on the contact support 16 and the inner wall of the housing 1, such as Figure 3 As shown, the positioning structure includes: a first positioning groove 21 and a second positioning groove 22, which are respectively arranged on both sides of the length direction of the upper cover 2; a third positioning groove 23 and a fourth positioning groove 24, which are respectively arranged on both sides of the length direction of the base 3, the third positioning groove 23 has the same size as the first positioning groove 21, and is arranged correspondingly up and down, and the fourth positioning groove 24 has the same size as the second positioning groove 22, and is arranged correspondingly up and down; two first positioning ribs 17, which are respectively arranged on one side of the contact support 16, and extend into the corresponding first The contact support 16 is provided with two second positioning ribs 18 on the other side of the contact support 16, and extend into the corresponding second positioning groove 22 and fourth positioning groove 24 respectively; wherein, when the contact support 16 is in the opening position, the two first positioning ribs 17 are simultaneously against the inner walls of the first positioning groove 21 and the third positioning groove 23; when the contact support 16 is in the closing position, the two second positioning ribs 18 are simultaneously against the inner walls of the second positioning groove 22 and the fourth positioning groove 24.

[0035] An operating mechanism for driving the contact support 16 to move is installed on the outer wall of the housing 1. Figure 1 , Figure 6 and Figure 7 As shown, the operating mechanism includes a driving plate 20 that rotates around the mounting shaft 19 and is connected to the contact support 16, the top surface of the upper cover 2 is formed with a mounting column 25 suitable for inserting the mounting shaft 19, and a plurality of reinforcing ribs 26 arranged at intervals along the circumference of the mounting column 25, and a boss 27 corresponding to the mounting column 25 is formed on the inner wall of the upper cover 2. It should be noted that the operating mechanism is an existing mature technology, so its specific structure and working principle are not described in detail.

[0036] The dual power conversion switch provided by the utility model is provided with a first partition plate 7 extending downward on the top surface of the upper cover 2, a second partition plate 8 extending upward and corresponding to the first partition plate 7 is provided on the base 3, a convex rib 9 is provided at the bottom of the first partition plate 7, and a slot 10 which is interference fit with the convex rib 9 is provided on the top of the second partition plate 8, thereby increasing the phase creepage distance, thereby preventing the arc from running into the adjacent contact area slot to cause a phase short circuit, and having better insulation performance, improving reliability, and extending the service life of the product.

[0037] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A dual power conversion switch, characterized in that: include: A housing (1) comprises an upper cover (2) and a base (3) arranged above and below, wherein the upper cover (2) and the base (3) enclose a cavity, wherein the cavity has a plurality of contact zone grooves (4) arranged at intervals along the length direction of the housing (1), and an arc isolation structure arranged between two adjacent contact zone grooves (4), wherein a stationary contact (5) and a moving contact (6) are installed in the contact zone grooves (4); The arc isolation structure comprises a first partition plate (7) extending downward from the top surface of the upper cover (2), and a second partition plate (8) extending upward from the base (3) and arranged corresponding to the first partition plate (7), wherein a convex rib (9) is provided at the bottom of the first partition plate (7), and a slot (10) which is interference-fitted with the convex rib (9) is provided at the top of the second partition plate (8).

2. The dual power conversion switch according to claim 1, characterized in that: The stationary contact (5) comprises a wiring portion (11), a mounting portion (12), a connecting portion (13) and a contact blade portion (14) which are connected in sequence; the mounting portion (12) is fixed to the connecting portion (13) by means of screws; and a clamping structure suitable for clamping the connecting portion (13) is provided inside the housing (1).

3. The dual power conversion switch according to claim 2, characterized in that: The clamping structure comprises a first clamping plate (151) provided on the base (3) and abutting against the bottom surface of the connecting portion (13), and a second clamping plate (152) provided on the upper cover (2) and abutting against the top surface of the connecting portion (13).

4. The dual power conversion switch according to claim 1, characterized in that: It also includes a contact support (16) slidably mounted in the middle of the housing (1), and a positioning structure is provided on the contact support (16) and the inner wall of the housing (1), and the positioning structure includes: A first positioning groove (21) and a second positioning groove (22) are respectively arranged on two sides of the upper cover (2) in the length direction; The third positioning groove (23) and the fourth positioning groove (24) are respectively arranged on both sides of the length direction of the base (3); the third positioning groove (23) has the same size as the first positioning groove (21) and is arranged correspondingly up and down; the fourth positioning groove (24) has the same size as the second positioning groove (22) and is arranged correspondingly up and down; Two first positioning ribs (17) are respectively arranged on one side of the contact support (16) and extend into the corresponding first positioning groove (21) and third positioning groove (23) respectively; Two second positioning ribs (18) are respectively arranged on the other side of the contact support (16) and extend into the corresponding second positioning groove (22) and fourth positioning groove (24) respectively; Wherein, when the contact support (16) is in the open position, the two first positioning ribs (17) simultaneously abut against the inner walls of the first positioning groove (21) and the third positioning groove (23); When the contact support (16) is in the closing position, the two second positioning ribs (18) simultaneously abut against the inner walls of the second positioning groove (22) and the fourth positioning groove (24).

5. The dual power conversion switch according to claim 1, characterized in that: The housing (1) is provided with a contact support (16) and an operating mechanism for driving the contact support (16) to move, the operating mechanism comprising a drive plate (20) rotating around a mounting shaft (19) and connected to the contact support (16), the top surface of the upper cover (2) being formed with a mounting column (25) suitable for inserting the mounting shaft (19), and a plurality of reinforcing ribs (26) arranged at intervals along the circumference of the mounting column (25).

6. The dual power conversion switch according to claim 5, characterized in that: A boss (27) corresponding to the mounting column (25) is formed on the inner wall of the upper cover (2).

7. The dual power conversion switch according to claim 1, characterized in that: An exhaust groove (28) corresponding to the contact area groove (4) is provided on the side wall of the upper cover (2).

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