Load switch with emergency opening function

Abstract

The utility model relates to a load switch with an emergency opening function. Belongs to the technical field of circuit protection devices. The problem that an existing load switch does not have an emergency opening function is solved. The switch comprises a frame body, a movable contact piece and a static contact piece, the operating shaft is connected with the movable contact piece and is used for driving the movable contact piece to act; the energy storage shaft is arranged on the frame body, and an energy storage spring is arranged on the energy storage shaft; the operating shaft is connected with the energy storage shaft through the connecting rod mechanism; the connecting rod mechanism has a first state of interlocking the operation shaft during switching on and a second state of unlocking and switching off; and the emergency opening mechanism is connected with the connecting rod mechanism and used for driving the connecting rod mechanism to act to realize emergency opening. According to the utility model, the emergency opening mechanism is arranged, and the connecting rod mechanism can act to unlock through the emergency opening mechanism, so that rapid opening is realized, the structure is simple, and the safety of products is improved. The utility model also has the advantages of simple structure, convenience in assembly, reliable action, long service life and the like.

Description

Technical Field

[0001] The utility model relates to a circuit protection device, in particular to a load switch with an emergency opening function. Background Art

[0002] Load switch is a kind of switch between circuit breaker and isolating switch, which can cut off rated load current and certain overload current. It mainly adopts air-insulated load switch and composite-insulated load switch. The arc extinguishing chamber of air-insulated load switch is completely exposed to the air and insulated by air. The insulation method of composite-insulated load switch is to fix the arc extinguishing chamber in the shielding tube of epoxy resin. Composite-insulated load switch is usually used in medium and high voltage fields, but its structure is complex and the production cost is high.

[0003] Existing load switches usually include an operating shaft, an energy storage shaft, a moving knife, and a static contact piece. Usually, an arc extinguishing chamber is not provided, or a simple arc extinguishing chamber (such as a sleeve or a plastic part) is provided. The operating shaft rotates to store energy for the energy storage spring. After the energy storage is completed, the switch can be closed or opened, that is, the moving knife and the static contact piece are connected or disconnected. Existing load switches can be closed or opened through the operating shaft, but usually no emergency opening function is provided, which makes the product have certain safety hazards when used. Utility Model Content

[0004] In order to solve the problem that the existing load switch in the background technology does not have an emergency opening function, the utility model provides a load switch with an emergency opening function.

[0005] The technical solution of the utility model is: a load switch with an emergency tripping function, including a frame, a moving contact piece and a stationary contact piece, and also includes:

[0006] An operating shaft is provided on the frame and connected to the moving contact piece, and is used to drive the moving contact piece to move; the operating shaft has a first position that enables the moving contact piece and the stationary contact piece to communicate with each other to realize the closing operation, and a second position that enables the moving contact piece and the stationary contact piece to separate to realize the opening operation;

[0007] An energy storage shaft is arranged on the frame, and an energy storage spring is arranged on the energy storage shaft;

[0008] A connecting rod mechanism, wherein the operating shaft is connected to the energy storage shaft through the connecting rod mechanism; the connecting rod mechanism has a first state when the operating shaft is interlocked so that the operating shaft is in its first position when the switch is closed, and a second state when the switch is unlocked and opened;

[0009] The emergency tripping mechanism is arranged on the frame and connected to the connecting rod mechanism to drive the connecting rod mechanism to realize emergency tripping.

[0010] The utility model has the advantages of being simple in structure, easy to assemble, reliable in action, and having a long service life, and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Attached Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model.

[0012] Attached Figure 2 This is a schematic structural diagram of the mounting plate of the first embodiment of the utility model.

[0013] Attached Figure 3 For attachment Figure 2 Schematic diagram of the structure in the other direction.

[0014] Attached Figure 4 For attachment Figure 2 Schematic diagram of the structure in the other direction.

[0015] Attached Figure 5 For attachment Figure 2 Schematic diagram of the local enlarged structure at point I in the middle.

[0016] Attached Figure 6 For attachment Figure 4 Schematic diagram of the local enlarged structure at II in the middle.

[0017] Attached Figure 7 This is a schematic diagram of the structure of the second embodiment of the present utility model.

[0018] In the figure, 1, frame; 11, mounting plate; 2, moving contact piece; 3, operating shaft; 4, energy storage shaft; 41, energy storage spring; 5, connecting rod mechanism; 51, first crank; 52, second crank; 53, first connecting rod; 54, second connecting rod; 55, first connecting shaft; 56, second connecting shaft; 57, third connecting shaft; 58, action shaft; 6, emergency opening mechanism; 61, emergency opening operating member; 62, opening transmission member; 621, jack; 622, limit part; 63, opening action plate; 631, opening part; 64, opening connecting plate; 641, toggle shaft; 65, pressing plate; 66, rotating plate; 661, pressure-bearing part; 662, toggle part. DETAILED DESCRIPTION

[0019] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0020] Depend on Figure 1 Combination Figure 2-7 As shown, a load switch with an emergency tripping function includes a frame 1, a moving contact piece 2 and a stationary contact piece, and also includes:

[0021] The operating shaft 3 is arranged on the frame 1 and connected to the moving contact piece 2 to drive the moving contact piece 2 to move; the operating shaft 3 has a first position that makes the moving contact piece 2 and the stationary contact piece connected to realize the closing operation and a second position that makes the moving contact piece 2 and the stationary contact piece separated to realize the opening operation;

[0022] An energy storage shaft 4 is arranged on the frame 1, and an energy storage spring 41 is arranged on the energy storage shaft 4;

[0023] A connecting rod mechanism 5, wherein the operating shaft 3 is connected to the energy storage shaft 4 through the connecting rod mechanism 5; the connecting rod mechanism 5 has a first state when the operating shaft 3 is interlocked so that the operating shaft 3 is in its first position when the switch is closed, and a second state when the switch is unlocked and opened;

[0024] The emergency trip mechanism 6 is arranged on the frame 1 and connected to the connecting rod mechanism 5 to drive the connecting rod mechanism 5 to realize emergency trip. The beneficial effect of the utility model is that an emergency trip mechanism is provided, and the connecting rod mechanism can be unlocked by the emergency trip mechanism, thereby realizing rapid tripping, having a simple structure, and improving the safety of the product. The utility model also has the advantages of simple structure, convenient assembly, reliable operation, and long service life. Specifically, both the first embodiment and the second embodiment adopt the emergency trip mechanism of the utility model, and the structure of the emergency trip mechanism is the same or similar. The first embodiment is a load switch with a grounding function, and the second embodiment is a load switch with a fuse.

[0025] The emergency tripping mechanism 6 comprises:

[0026] The emergency opening operating member 61 is provided on the frame 1;

[0027] The opening transmission member 62 is arranged on the frame 1;

[0028] The opening action plate 63 is arranged on the frame 1 and is used to drive the connecting rod mechanism 5 to unlock; the emergency opening operation member 61 drives the opening action plate 63 to move through the opening transmission member 62. Such a joint drives the connecting rod mechanism to unlock through the emergency opening operation member, so that the operating shaft is quickly driven to open the gate by the elastic potential energy.

[0029] The utility model further comprises a switch-off connecting plate 64, and the switch-off transmission member 62 is connected to the switch-off action plate 63 via the switch-off connecting plate 64. Such a switch-off connecting plate is provided, which has a simple structure, reliable transmission, does not interfere with the action of the connecting rod mechanism, and has a small change to the overall product, so that the mechanism has a wide range of adaptation.

[0030] The utility model further comprises a mounting plate 11, the mounting plate 11 is arranged on the frame 1, the opening brake transmission member 62 and the opening brake action plate 63 are both hinged on the mounting plate 11, and the opening brake connection plate 64 and the opening brake action plate 63 are arranged on both sides of the mounting plate 11. In this way, the space between the panel and the mounting plate is reasonably utilized, which is convenient for product installation.

[0031] The opening action plate 63 is provided with an opening part 631 for driving the connecting rod mechanism 5 at the other end thereof connected to the opening connection plate 64. The opening part can be used to toggle the action shaft, so that the connecting rod mechanism is reliably unlocked, so that the product can be opened quickly, the emergency opening function is realized, and the safety of the product is improved.

[0032] The opening gate connecting plate 64 is provided with a toggle shaft 641, and the opening gate transmission member 62 is provided with a plug hole 621. The toggle shaft 641 is inserted into the plug hole 621 and drives the opening gate connecting plate 64 to move through the toggle shaft 641 when the opening gate transmission member 62 rotates. Such a structure enables the opening gate transmission member to reliably drive the opening gate connecting plate to move, thereby driving the opening gate action plate to unlock. In fact, the opening gate connecting plate is also arranged on the mounting plate.

[0033] The utility model further includes a pressing plate 65, and the emergency opening brake operating member 61 is connected to the pressing plate 65. The emergency opening brake operating member 61 is connected to the opening brake transmission member 62 through the pressing plate 65 and drives the opening brake transmission member 62 to rotate. In this way, the emergency opening brake operating member can be set as a button for easy operation. Of course, the opening brake operation can also be realized by rotating the opening brake transmission member to actuate.

[0034] The utility model further comprises a rotating plate 66, which is rotatably arranged, and the pressing plate 65 is connected to the opening gate transmission member 62 through the rotating plate 66 and is used to drive the opening gate transmission member 62 to rotate. The rotating plate 66 is provided with a pressure-bearing portion 661 for pressing by the pressing plate 65 and a toggle portion 662 for driving the opening gate transmission member 62 to move. This structure is simple, and the space of the mounting plate below the connecting rod mechanism is reasonably utilized. When the pressing plate moves, the opening gate transmission member can be reliably driven to move to realize opening.

[0035] The connecting rod mechanism 5 comprises:

[0036] The first crank 51 is provided on the operating shaft 3

[0037] A second crank 52 is provided on the energy storage shaft 4;

[0038] The first connecting rod 53 is connected to the first crank 51 via a first connecting shaft 55.

[0039] The second connecting rod 54 is connected to the second crank 52 through the second connecting shaft 56; the first connecting rod 53 and the second connecting rod 54 are connected through the third connecting shaft 57: the connecting line of the axes of the first connecting shaft 55, the second connecting shaft 56 and the third connecting shaft 57 is arranged in a straight line when the operating shaft 3 is in its first position. Specifically, the connecting rod mechanism forms a closing hold by connecting the axes of the connecting shafts on the same straight line, so a reliable opening can be achieved by destroying the balance with a very small force. Of course, in fact, the opening hold is also achieved by connecting the axes of the connecting shafts on the same straight line. The schematic state of the connecting rod mechanism when the opening hold is given in the attached figure.

[0040] The connecting rod mechanism 5 is provided with an action shaft 58, the opening action plate 63 cooperates with the action shaft 58 to drive the connecting rod mechanism 5 to open the gate, and the opening transmission member 62 is provided with a limiter 622 for limiting the rotation of the action shaft 58. The setting of the limiter prevents the connecting rod mechanism from over-moving and affecting the subsequent product action.

Claims

1. A load switch with an emergency tripping function, comprising a frame (1), a moving contact piece (2) and a stationary contact piece, characterized in that Also included: An operating shaft (3) is arranged on the frame (1), connected to the moving contact piece (2), and used to drive the moving contact piece (2) to move; the operating shaft (3) has a first position in which the moving contact piece (2) and the stationary contact piece are connected to realize a closing operation, and a second position in which the moving contact piece (2) and the stationary contact piece are separated to realize an opening operation; An energy storage shaft (4) is arranged on the frame (1), and an energy storage spring (41) is arranged on the energy storage shaft (4); A connecting rod mechanism (5), wherein the operating shaft (3) is connected to the energy storage shaft (4) via the connecting rod mechanism (5); the connecting rod mechanism (5) has a first state in which the operating shaft (3) is interlocked when the switch is closed so that the operating shaft (3) is in its first position, and a second state in which the switch is unlocked when the switch is opened; The emergency opening mechanism (6) is arranged on the frame (1) and is connected to the connecting rod mechanism (5) to drive the connecting rod mechanism (5) to move and realize emergency opening.

2. A load switch with emergency tripping function according to claim 1, characterized in that The emergency tripping mechanism (6) comprises: An emergency opening operating member (61) is arranged on the frame (1); A brake opening transmission member (62) is arranged on the frame (1); The opening brake actuation plate (63) is arranged on the frame (1) and is used to drive the connecting rod mechanism (5) to actuate and unlock; the emergency opening brake operating member (61) drives the opening brake actuation plate (63) to actuate via the opening brake transmission member (62).

3. A load switch with emergency tripping function according to claim 2, characterized in that It also comprises a switch-off connecting plate (64), and the switch-off transmission member (62) is connected to the switch-off actuating plate (63) via the switch-off connecting plate (64).

4. A load switch with emergency tripping function according to claim 3, characterized in that It also comprises a mounting plate (11), wherein the mounting plate (11) is arranged on the frame (1), the opening brake transmission member (62) and the opening brake actuation plate (63) are both hinged on the mounting plate (11), and the opening brake connection plate (64) and the opening brake actuation plate (63) are arranged on both sides of the mounting plate (11).

5. A load switch with emergency tripping function according to claim 3, characterized in that The opening gate actuating plate (63) is provided with an opening gate portion (631) for driving the connecting rod mechanism (5) to actuate on the other end thereof which is connected to the opening gate connecting plate (64).

6. A load switch with emergency tripping function according to claim 3, characterized in that The opening gate connecting plate (64) is provided with a toggle shaft (641), the opening gate transmission member (62) is provided with a plug hole (621), the toggle shaft (641) is inserted into the plug hole (621) and drives the opening gate connecting plate (64) to move via the toggle shaft (641) when the opening gate transmission member (62) rotates.

7. A load switch with emergency tripping function according to claim 2, characterized in that It also includes a pressing plate (65), the emergency opening switch operating member (61) is connected to the pressing plate (65), and the emergency opening switch operating member (61) is connected to the opening switch transmission member (62) through the pressing plate (65) and drives the opening switch transmission member (62) to rotate.

8. A load switch with emergency tripping function according to claim 7, characterized in that The device further comprises a rotating plate (66), wherein the rotating plate (66) is rotatably arranged, and the pressing plate (65) is connected to the opening gate transmission member (62) via the rotating plate (66) and is used to drive the opening gate transmission member (62) to rotate, and the rotating plate (66) is provided with a pressure-bearing portion (661) for facilitating the pressing of the pressing plate (65) and a toggle portion (662) for driving the opening gate transmission member (62) to move.

9. A load switch with emergency tripping function according to claim 1, characterized in that The connecting rod mechanism (5) comprises: A first crank (51) is disposed on the operating shaft (3) A second crank (52) is disposed on the energy storage shaft (4); The first connecting rod (53) is connected to the first crank (51) via a first connecting shaft (55). The second connecting rod (54) is connected to the second crank (52) via a second connecting shaft (56); the first connecting rod (53) and the second connecting rod (54) are connected via a third connecting shaft (57); a line connecting the axes of the first connecting shaft (55), the second connecting shaft (56) and the third connecting shaft (57) is arranged in a straight line when the operating shaft (3) is in its first position.

10. A load switch with emergency tripping function according to claim 2, characterized in that The connecting rod mechanism (5) is provided with an action shaft (58), the opening brake action plate (63) and the action shaft (58) cooperate with each other to drive the connecting rod mechanism (5) to open the brake, and the opening brake transmission member (62) is provided with a limit portion (622) for limiting the rotation of the action shaft (58).

Images