Load switch with arc extinguish chamber

Abstract

The utility model relates to a load switch with an arc extinguish chamber. Belongs to the technical field of circuit protection devices. The problem that an existing load switch is not provided with an arc extinguish chamber and is poor in arc extinguish effect is solved. The device comprises a frame body, the static contact piece is arranged on the frame body and is used for circuit connection; the movable contact piece is arranged on the frame body, and the movable contact piece is provided with a first position when the movable contact piece is separated from the static contact piece and a second position when the movable contact piece is communicated with the static contact piece; the arc extinguish chamber is arranged on the frame body; the static contact piece is arranged in the arc extinguish chamber, the arc extinguish chamber is provided with a guide groove, and the movable contact piece is inserted into the guide groove to be connected with the static contact piece. The beneficial effects of the utility model are that the arc extinguish chamber is arranged, when the movable contact piece can be inserted into the arc extinguish chamber to be connected with or separated from the static contact piece, the arc is separated in the arc extinguish chamber, the arc extinguish is rapid, the structure is simple, the arc extinguish is convenient and reliable, the safety is high, the guide groove is arranged to facilitate the movement of the movable contact piece, the structure is simple, and the action is convenient and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit protection devices, in particular to a load switch with an arc extinguishing chamber. 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 moving and static contacts, and usually do not have an arc extinguishing chamber, or a simple arc extinguishing chamber (such as a sleeve or a plastic part) is provided. When the load switch is disconnected, the contacts separate rapidly, causing the current to generate an arc between the contacts. The arc extinguishing device (such as an arc extinguishing grid or an arc extinguishing chamber) stretches and cools the arc to increase the resistance of the arc and reduce the current. When the arc is cooled to a sufficiently low temperature, its conductivity decreases and eventually disappears, and the load switch successfully cuts off the current. The key to this arc extinguishing process is to reduce the energy of the arc as quickly as possible and increase its resistance to prevent the arc from continuing to exist after the contacts are separated, thereby achieving safe and reliable current interruption. However, the existing arc extinguishing chamber is a simple sleeve with poor arc extinguishing performance and certain safety hazards. In addition, the existing moving contact is usually arc-shaped or linear, and it is usually achieved by rotation to close and open the switch. In order to ensure reliable disconnection, that is, to ensure the rotation distance of the contact, the existing load switch is large in size, which makes the product cost high and inconvenient to carry. Utility Model Content

[0004] In order to solve the problem that the load switch in the background technology has no arc extinguishing chamber and the arc extinguishing effect is poor, the utility model provides a load switch with an arc extinguishing chamber.

[0005] The technical solution of the utility model is: a load switch with an arc extinguishing chamber, including a frame, and also including:

[0006] The static contact piece is arranged on the frame and used for circuit connection;

[0007] A moving contact piece is arranged on the frame, and the moving contact piece has a first position when it is separated from the stationary contact piece and a second position when it is connected with the stationary contact piece;

[0008] The arc extinguishing chamber is arranged on the frame; the static contact piece is arranged in the arc extinguishing chamber, the arc extinguishing chamber is provided with a guide groove, and the moving contact piece is inserted into the guide groove and connected with the static contact piece.

[0009] The beneficial effects of the utility model are that an arc extinguishing chamber is provided, and the moving contact piece can be inserted into the arc extinguishing chamber and connected with the static contact piece. When separated, the arc is isolated in the arc extinguishing chamber and extinguished quickly. The structure is simple, the arc extinguishing is convenient and reliable, and the safety is high. The setting of the guide groove facilitates the movement of the moving contact piece. The structure is simple, and the action is convenient and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Attached Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model.

[0011] Attached Figure 2 It is a structural schematic diagram of another direction of the first embodiment of the utility model.

[0012] Attached Figure 3 It is a schematic structural diagram of the arc extinguishing chamber of an embodiment of the utility model.

[0013] Attached Figure 4 This is a schematic diagram of the structure of the second embodiment of the present utility model.

[0014] In the figure, 1, frame; 2, static contact; 21, static contact; 3, moving contact; 31, connection area; 4, arc extinguishing chamber; 41, guide groove; 42, shell; 43, partition; 431, notch; 432, block; 433, through hole; 44, accommodating cavity; 45, guide member; 451, guide slope; 46, elastic member; 47, terminal block; 5, operating shaft; 6, transmission member; 7, connecting rod; 8, guide assembly; 81, guide sleeve; 82, guide wheel group. DETAILED DESCRIPTION

[0015] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0016] Depend on Figure 1 Combination Figure 2-4 As shown, a load switch with an arc extinguishing chamber includes a frame 1) and further includes:

[0017] The static contact piece 2 is arranged on the frame 1 and is used for circuit connection;

[0018] A moving contact piece 3 is provided on the frame 1, wherein the moving contact piece 3 has a first position when it is separated from the stationary contact piece 2 and a second position when it is connected to the stationary contact piece 2;

[0019] The arc extinguishing chamber 4 is arranged on the frame 1; the static contact piece 2 is arranged in the arc extinguishing chamber 4, and the arc extinguishing chamber 4 is provided with a guide groove 41, and the movable contact piece 3 is inserted into the guide groove 41 and connected with the static contact piece 2. The beneficial effect of the utility model is that the arc extinguishing chamber is provided, and the movable contact piece can be inserted into the arc extinguishing chamber and connected with the static contact piece. When separated, the arc is isolated in the arc extinguishing chamber and extinguished quickly. The structure is simple, the arc extinguishing is convenient and reliable, and the safety is high. The setting of the guide groove facilitates the movement of the movable contact piece, and the structure is simple, and the action is convenient and reliable. Specifically, both the first embodiment and the second embodiment adopt the arc extinguishing chamber of the utility model, and the transmission structure of the movable knife (moving contact piece) 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.

[0020] The arc extinguishing chamber 4 includes a shell 42 and a partition 43. The partition 43 divides the space in the arc extinguishing chamber 4 into at least two accommodating chambers 44. The static contact piece 2 is arranged in the accommodating chamber 44. The arrangement of the partition makes it easy to install the static contact piece, and the generated arc will not run around with the moving contact piece, playing the role of arc blocking, and at the same time, it is convenient for arc cooling and arc extinguishing, and multiple intervals are formed to facilitate the assembly and disassembly of other parts.

[0021] The partition 43 is provided with a notch 431. The notches 431 of different partitions 43 form the guide groove for the moving contact piece 3 to pass through. The partition and the shell are an integrated structure. Specifically, the partition 43 is provided with a stopper 432. There are two stoppers 432. The notch 431 is formed between the two stoppers 432. The outer side of the notch 431 is provided with a through hole 433. More specifically, the notch on the partition can be smaller than the guide groove at the bottom of the shell, which is convenient for the insertion of the moving contact piece. The shell has two shells that cooperate to form a guide groove, and each shell is provided with a partition. The setting of the stopper limits the moving contact piece after it is inserted into the shell to prevent the moving contact piece from shifting and affecting the contact with the static contact piece. The setting of the through hole makes the baffle have a certain elasticity, which is convenient for the insertion and removal of the moving contact piece.

[0022] The utility model further includes a guide member 45, which is arranged in the accommodating chamber 44 of the housing 42. The static contact piece 2 is arranged in the accommodating chamber 44 at the far end of the insertion direction of the moving contact piece 3. The guide member 45 is arranged from the accommodating chamber 44 near the static contact piece 2 to the insertion direction of the moving contact piece 3. Specifically, it also includes an elastic member 46, which abuts against the guide member 45 and is used to drive the guide member 45 to move toward the guide groove 41; the guide member 45 is provided with a guide slope 451 on one side near the guide groove 41, and the guide member 45 is slidably matched with the arc extinguishing chamber 4. Such a structure guides the moving contact piece, facilitates the reliable insertion of the moving contact piece and maintains balance, and allows the bottom guide groove of the housing to be slightly enlarged, which is convenient for the insertion and removal of the moving contact piece, and then through the baffle, the guide member and the like to limit, the moving contact piece can be reliably fitted with the static contact piece. More specifically, a support plate is provided in the housing, and the support plate is usually arranged in an annular shape, and the guide member cover is placed on the support plate.

[0023] The static contact piece 2 is provided with a static contact 21, and the movable contact piece 3 is provided with a connection area 31. The static contact 21 is in contact with the connection area 31 when the movable contact piece 3 is in its second position; the static contact 21 and the connection area 31 are both integrally formed with copper-tungsten material. The contacts set with copper-tungsten material mainly utilize its excellent electrical conductivity and high temperature resistance, and have the advantages of strong arc resistance, excellent electrical conductivity, wear resistance, high thermal stability, etc., to improve the electrical performance and life of the switch.

[0024] The utility model also includes a terminal board 47, one end of which is inserted into the arc extinguishing chamber to connect with the static contact piece 2, and the other end is extended out of the arc extinguishing chamber 4, and the terminal board 47 is in an inverted "L" shape. Such a structure is simple and reliable, and the connection is convenient.

[0025] The utility model also includes:

[0026] The operating shaft 5 is provided on the frame 1 and is used to operate the movable contact piece 3;

[0027] A transmission member 6, connected to the operating shaft 5 and driven to move by the operating shaft 5;

[0028] The connecting rod 7 is respectively connected to the transmission member 6 and the movable contact piece 3 by hinge connection. The transmission member 6 drives the movable contact piece 3 to reciprocate in the vertical direction through the connecting rod 7 (see the attached Figure 1 or 4);

[0029] The guide assembly 8 is arranged below the arc extinguishing chamber 4 on the frame 1, and is used for limiting the movement of the moving contact piece 3. Specifically, the guide assembly 8 includes a guide sleeve 81 and a guide wheel group 82. The moving contact piece 3 is arranged through the guide sleeve 81 and the guide wheel group 82. The moving contact piece 3 is arranged linearly and is driven by the transmission member 6 to reciprocate vertically. Such a structure makes the moving contact piece simple in structure and easy to process. When in motion, the moving contact piece moves linearly, and there is no need to increase the volume of the product horizontally to adapt to the swing of the moving contact piece. Therefore, the overall volume of the product can be reduced, and the internal space of the product can be reasonably used.

Claims

1. A load switch with an arc extinguishing chamber, comprising a frame (1), characterized in that: Also includes: A stationary contact piece (2) is arranged on the frame (1) and is used for circuit connection; A movable contact piece (3) is arranged on the frame (1), wherein the movable contact piece (3) has a first position when it is separated from the stationary contact piece (2) and a second position when it is connected to the stationary contact piece (2); The arc extinguishing chamber (4) is arranged on the frame (1); the static contact piece (2) is arranged in the arc extinguishing chamber (4), the arc extinguishing chamber (4) is provided with a guide groove (41), and the movable contact piece (3) is inserted into the guide groove (41) and connected with the static contact piece (2); The arc extinguishing chamber (4) comprises a shell (42) and a partition (43); the partition (43) divides the space in the arc extinguishing chamber (4) into at least two accommodating chambers (44); and the stationary contact piece (2) is arranged in the accommodating chamber (44).

2. A load switch with an arc extinguishing chamber according to claim 1, characterized in that The partition (43) is provided with a notch (431), and the notches (431) of different partitions (43) form the guide groove for the moving contact piece (3) to pass through, and the partition and the shell are an integrated structure.

3. A load switch with an arc extinguishing chamber according to claim 2, characterized in that The partition (43) is provided with a stopper (432), there are two stoppers (432), a notch (431) is formed between the two stoppers (432), and a through hole (433) is provided on the outside of the notch (431).

4. A load switch with an arc extinguishing chamber according to claim 1, characterized in that It also includes a guide member (45) disposed in a receiving cavity (44) of the housing (42); the stationary contact piece (2) is disposed in the receiving cavity (44) at the far end in the insertion direction of the moving contact piece (3); and the guide member (45) is arranged from the receiving cavity (44) near the stationary contact piece (2) toward the insertion direction of the moving contact piece (3).

5. A load switch with an arc extinguishing chamber according to claim 4, characterized in that It also includes an elastic member (46), the elastic member (46) abutting against the guide member (45) and used to drive the guide member (45) to move toward the guide groove (41); the guide member (45) is provided with a guide inclined surface (451) on a side close to the guide groove (41), and the guide member (45) is slidably matched with the arc extinguishing chamber (4).

6. A load switch with an arc extinguishing chamber according to claim 1, characterized in that The stationary contact piece (2) is provided with a stationary contact point (21), the moving contact piece (3) is provided with a connecting area (31), and the stationary contact point (21) is in contact with the connecting area (31) when the moving contact piece (3) is in its second position; the stationary contact point (21) and the connecting area (31) are both integrally formed of copper-tungsten material.

7. A load switch with an arc extinguishing chamber according to claim 1 or 6, characterized in that It also includes a terminal board (47), one end of which is inserted into the arc extinguishing chamber to connect with the static contact piece (2), and the other end of which is extended out of the arc extinguishing chamber (4), and the terminal board (47) is in an inverted "L" shape.

8. A load switch with an arc extinguishing chamber according to claim 1, characterized in that Also includes: An operating shaft (5) is disposed on the frame (1) and is used to operate the movable contact piece (3); A transmission member (6) connected to the operating shaft (5) and driven to move by the operating shaft (5); The connecting rod (7) is respectively hingedly connected to the transmission member (6) and the movable contact piece (3), and the transmission member (6) drives the movable contact piece (3) to reciprocate in the vertical direction through the connecting rod (7); The guide assembly (8) is arranged below the arc extinguishing chamber (4) on the frame (1) and is used for limiting the movement of the moving contact piece (3).

9. A load switch with an arc extinguishing chamber according to claim 8, characterized in that The guide assembly (8) comprises a guide sleeve (81) and a guide wheel assembly (82), the movable contact piece (3) is arranged through the guide sleeve (81) and the guide wheel assembly (82), and the movable contact piece (3) is arranged in a linear manner and is driven by the transmission member (6) to perform vertical reciprocating motion.

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