CN201315254Y - Five-station change-over switch - Google Patents

Abstract

The utility model discloses a five-station change-over switch which comprises a switch casing, wherein, a moving contact and a static contact are arranged in the casing, a gear rack transmission mechanism is also arranged in the casing, the moving contact is arranged on a rack of the gear rack transmission mechanism, and the static contact is fixedly arranged on the inner wall of the casing along the direction of motion of the rack. Due to the adoption of the structure, the rotational motion of the contacts is replaced by the straight-line motion of the gear rack, and the inertia of the contacts during the rotating process is reduced. The utility model is accurate in transmission, enables the switching in-off to be more proper, saves the manufacturing material and also reduces the production cost.

Description

A five-position toggle switch

technical field

The utility model relates to a closed combined electric switch, in particular to a combined electric switch capable of realizing busbar operation, isolation and grounding.

Background technique

Although the high-voltage circuit breaker is the most important control and protection equipment in the power system, it must cooperate with other electrical equipment to complete the control and protection functions in use. In order to meet this demand, the manufacturer connects circuit breakers, isolation and grounding switches with different functions and installs them in a metal-enclosed switchgear, which is a combined electrical appliance. In order to realize mutual switching between two busbars, other operations such as isolation and grounding of lines and busbars must also be satisfied. Under this demand, the five-position switch came into being. In order to realize the mutual switching between the double busbars and the isolation and grounding functions of the transmission network, the motor is mainly used to drive the moving contact to rotate at different angles. However, due to the relatively large mass of the contacts, the braking performance is not good due to inertia during the rotation of the contacts, which will result in inappropriate busbar fit, isolation and grounding, which will endanger the safe operation of the power grid.

Utility model content

The purpose of the utility model is to provide a closed five-station combination electric switch whose movable contact moves in a straight line, so as to solve the above-mentioned problems.

The technical scheme of the utility model is: a five-position switching switch, including a switch casing, a one-to-one corresponding moving contact and a static contact are arranged in the casing, and a rack and pinion transmission mechanism is also arranged in the casing , the moving contact is arranged on the rack of the rack-and-pinion transmission mechanism, and the static contact is fixed on the inner wall of the housing along the moving direction of the rack.

The static contact includes two grounding contacts respectively fixed on both ends of the inner wall of the casing and two busbar contacts respectively fixed on both sides of the inner wall of the casing, and the moving contact includes two corresponding grounding contacts fixed on The first contact finger, the second contact finger at both ends of the rack, and the third contact finger and fourth contact finger corresponding to the busbar contact fingers are respectively fixed on both sides of the rack.

The ground contacts located at both ends of the housing and the first and second contact fingers located at both ends of the rack are plug-in electrical connections, and the busbar contacts located on both sides of the housing and the contacts located on both sides of the rack The third contact finger is matched with the fourth contact finger for sliding electrical connection.

With the above structure, the rotary motion of the contact is replaced by the linear motion of the rack and pinion, which reduces the inertia during the rotation of the contact. Its transmission is accurate, the opening and closing are more in place, and the production materials are saved, which reduces the production cost. .

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is a schematic diagram of the bus switching state of the utility model;

Fig. 4 is a schematic diagram of putting into operation of the bus bar of the present utility model;

Fig. 5 is a schematic diagram of the isolation state of the utility model;

Fig. 6 is a schematic diagram of a grounding state of the utility model;

Fig. 7 is the schematic diagram of putting into operation of the second busbar of the utility model;

Fig. 8 is a schematic diagram of the second grounding state of the utility model.

Detailed ways

As shown in Figure 1 and Figure 2, a rack and pinion transmission mechanism is arranged in a circular shell 6, including a gear 9 and a rack 7, the gear 9 is located below the rack 7, and a transmission shaft 10 is worn on the gear 9 , the transmission shaft 10 passes through the casing 6 and is connected with the transmission mechanism. Wherein, the rack 7 is provided with a first moving contact finger 1, a second moving contact finger 2, a third moving contact finger 3 and a fourth moving contact finger 4, the first moving contact finger 1 and the second moving contact finger 2 They are respectively fixed at both ends of the rack 7, and the second movable contact finger 2 and the third movable contact finger 3 are respectively arranged on both sides of the rack 7 and are slightly misaligned forward and backward. The directions are respectively fixed with the ground contact 5, the ground contact 8, the bus contact 11 and the bus contact 12, wherein the ground contact 5 and the ground contact 8 are arranged on the two ends of the inner wall of the shell 6 and are connected with the first moving contact respectively. The finger is inserted into the second movable contact finger 2, and the bus contact 11 and the bus contact 12 are respectively arranged on both sides of the inner wall of the housing 6 and are slidably matched with the third movable contact finger 3 and the fourth movable contact finger 4 respectively.

The operating state of the utility model is shown in Fig. 3 - Fig. 8, wherein, in Fig. 3, the movable contact fingers 3, 4 on both sides of the rack are connected with the fixed busbar contacts 11, 12 on the housing respectively, and the Switching between two busbars; in Figure 4, the rack 7 moves downward, the movable contact finger 3 is disconnected from the busbar contact 11, the movable contact finger 4 and the busbar contact 12 continue to conduct, and the busbar contact 12 is connected As soon as the busbar enters the running state; in Figure 5, the rack 7 continues to move downward, the movable contact finger 4 is disconnected from the bus contact 12, and the switch enters the isolation state; in Figure 6, the rack 7 descends to the bottom, and the movable contact finger 2 Insert into the grounding contact 8 to complete the grounding state; in Figure 7, the rack 7 goes up, after the busbar switching as shown in Figure 3, the movable contact finger 4 is disconnected from the busbar contact 12, and the movable contact finger 3 is connected to the busbar The contact 11 continues to conduct, and the bus bar 2 connected to the bus bar contact 11 is put into operation; in Figure 8, the rack 7 goes up to the top, the movable contact finger 3 is disconnected from the bus bar contact 11, and the movable contact finger 1 is inserted into the ground Contact 5 enters the ground state.

The utility model is not limited to the above-mentioned embodiments, and those skilled in the art can easily think of other structures or shapes of dynamic and static contact connection methods, but no matter how the structure or shape changes, as long as the rack and pinion transmission mechanism is used for the switch internal The separation and closing of the movable and static contacts, and the arrangement of the movable contacts on the rack, and the fixing of the static contacts on the inner wall of the shell, are all within the scope of protection of the present invention.

Claims (3)

1, a kind of five station diverter switches, comprise switch housing, be provided with moving contact and fixed contact one to one in the enclosure, it is characterized in that, in described shell, also be provided with a rack and pinion drive mechanism, described moving contact is arranged on the tooth bar of this rack and pinion drive mechanism, and described fixed contact is installed on the inwall of shell along the described tooth bar direction of motion.

2, five station diverter switches according to claim 1, it is characterized in that, described fixed contact comprises two grounding contact and two bus contacts that are installed in the outer casing inner wall side respectively of being installed in respectively on the outer casing inner wall two ends, and described moving contact comprises that corresponding respectively grounding contact is fixed on the 3rd fingertip and the 4th fingertip that first fingertip at described tooth bar two ends, second fingertip and corresponding described bus fingertip are separately fixed at the tooth bar side.

3, five station diverter switches according to claim 2, it is characterized in that, described at the shell two ends grounding contact and between first fingertip at tooth bar two ends and second fingertip for plug-in type electromagnetic is connected cooperation, described bus contact and being electrically connected for sliding between the 3rd fingertip of tooth bar both sides and the 4th fingertip in the shell both sides cooperates.

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