CN201893269U - High-voltage disconnector contact component - Google Patents

Abstract

The utility model discloses a high-voltage disconnector contact component, which comprises a moving contact and a fixed contact. The moving contact includes T-shaped moving contact fingers axially fixed to the end of a conductive pole and symmetrically disposed along an axis of the conductive pole. The fixed contact includes a fixed contact seat, a U-shaped groove is arranged on one side of the fixed contact seat, U-shaped fixed contact fingers in contact fit with the T-shaped moving contact fingers are respectively disposed on the upper groove wall and the lower groove wall of the U-shaped groove, and opening directions of the two U-shaped fixed contact fingers respectively face tangential directions of the T-shaped moving contact fingers in axial rotation. The high-voltage disconnector contact component is simple in structure, convenient in mounting and maintenance and reliable in performance, and solves the problem of large friction force between the moving contact and the fixed contact during connection and disconnection, and thereby load of an operating mechanism is reduced and matching reliability between the moving contact and the fixed contact is enhanced.

Description

A high-voltage isolating switch contact assembly

technical field

The utility model relates to a contact structure used on a high-voltage isolating switch.

Background technique

The high-voltage isolating switch is mainly used for switching the high-voltage line under the condition of no current carrying, and electrically isolating the high-voltage busbar, circuit breaker and other electrical equipment under maintenance from the high-voltage line, providing the overhauled equipment and maintenance personnel with a safe and visible insulation distance.

In my country's electric power transmission and distribution projects, a three-column horizontal rotary double-break isolating switch is widely used. A horizontally rotating conductive rod is installed on the porcelain bottle, and the two ends of the conductive rod are respectively equipped with moving contacts corresponding to the static contacts on both sides. The static contact assembly includes a static contact seat, a U-shaped notch is opened on one side of the static contact seat, and U-shaped static contact fingers are respectively installed on the upper and lower groove walls of the U-shaped notch in an axisymmetric manner. The openings of the two U-shaped static contact fingers are all facing the groove bottom of the U-shaped groove, and a spring for clamping the moving contact is connected to the U-shaped static contact fingers. When switching on, the conductive rod drives the moving contact to rotate horizontally, and produces axial rotation when contacting the static contact, relying on the compression of the spring connected to the static contact finger to provide contact pressure. However, with this structure, when the conductive rod rotates to drive the moving contact to contact the static contact, since the opening directions of the two U-shaped static contact fingers on the static contact seat are the same, one side of the U-shaped static contact The direction of the finger opening is opposite to the direction of rotation of the moving contact, so there will be a large friction force between the moving and static contacts, which will not only affect the cooperation of the moving and static contacts, but also increase the load on the operating mechanism and reduce the reliability of the isolating switch. At the same time, in this kind of isolating switch, since there is no buffer device between the moving contact and the static contact, the moving contact will have a large impact on the static contact during the closing process, which will damage the isolating switch. stability.

Utility model content

The purpose of the utility model is to provide a high-voltage isolating switch contact assembly to solve the problem in the prior art that there is a large friction force between the moving contact and the static contact when opening and closing.

The technical scheme of the high-voltage isolating switch contact assembly of the utility model is: a high-voltage isolating switch contact assembly, including a moving contact and a static contact. The T-shaped movable contact finger on the side is arranged symmetrically along the axis of the conductive rod. The static contact includes a static contact seat, and a U-shaped notch is opened on one side of the static contact seat. U-shaped static contact fingers that are in contact with the corresponding T-shaped movable contact fingers are arranged on the upper and lower sides of the groove wall of the notch, and the opening directions of the two U-shaped static contact fingers are respectively facing the corresponding T-shaped movable contact fingers. The tangent direction when rotating.

The U-shaped static contact finger is composed of more than two U-shaped static contact pieces arranged side by side.

At the bottom of the U-shaped notch of the static contact seat, there is an elastic buffer device facing the direction of the notch. The elastic buffer device is mainly composed of a shell fixed on the static contact seat and a The compression spring is composed of a push rod that cooperates with the axial limit of the housing and is matched with the compression spring. The push rod extends horizontally toward the U-shaped notch of the static contact seat.

On the upper and lower sides of the U-shaped notch, there are respectively provided pressing springs corresponding to each of the U-shaped static contact pieces.

An auxiliary static contact for arc striking is arranged on the outer wall of one end of each of the static contact seats, and an auxiliary movable contact corresponding to the auxiliary static contact is coaxially mounted on one end of the T-shaped movable contact finger.

The contact assembly of the utility model has the advantages of simple structure, reliable performance, and convenient installation and maintenance. Since the opening direction of the U-shaped static contact finger is set as the tangential direction of the T-shaped movable contact finger when it rotates axially, the dynamic contact assembly can be reduced. The friction force when the contacts are turned over solves the problem of large friction force between the dynamic and static contacts in the prior art when opening and closing, thereby reducing the load on the operating mechanism and improving the reliability of the cooperation between the dynamic and static contacts sex.

Description of drawings

Figure 1 is a schematic diagram of the installation structure of a specific embodiment of the high-voltage disconnector contact assembly of the present invention;

Fig. 2 is a sectional view of A-A in Fig. 1 .

Detailed ways

The specific embodiment of the high-voltage isolating switch contact assembly of the present utility model is shown in Fig. 1 and Fig. 2, wherein, the movable contact 20 includes coaxially installed on the outer circumference of the end of the conductive rod 3 and is symmetrically arranged along its axis at 180° The T-shaped movable contact finger 5 and the auxiliary contact finger 12 fixed on one side of the end of the conductive rod 3; the static contact includes a static contact seat 1, and one side of the static contact seat 1 is provided with an opening to form a U-shaped groove structure, The upper and lower sides of the U-shaped groove are oppositely fixed with static contact fingers 4 which are in contact with corresponding T-shaped movable contact fingers 5 . In this embodiment, the two static contact fingers 4 are composed of two or more U-shaped static contact pieces arranged side by side along the extending direction of the U-shaped groove, and the side plates where each U-shaped static contact piece is in contact with the corresponding groove wall are covered by The pressing plate 15 extending in the same direction and the bolts are fixed on the groove wall, and the other side plate of each U-shaped static contact piece is press-contacted with the corresponding T-shaped movable contact finger on the conductive rod. In order to improve the elasticity of each U-shaped static contact piece and ensure a stable electrical connection between the U-shaped static contact piece and the corresponding T-shaped movable contact finger, through holes are respectively opened on the upper and lower sides of the U-shaped groove. The hole is equipped with a push rod 17 that is press-fitted with the other side plate of the corresponding U-shaped static contact piece, and the top and bottom of the outer groove wall on the upper and lower sides of the U-shaped groove are pushed through the fixed strip cover plate 7 respectively. A pressure spring 16 that is pressure-fitted with the corresponding push rod 17 is housed. Since the movable contact 20 needs to rotate an angle axially after swinging into the U-shaped groove of the static contact seat, the T-shaped movable contact fingers 5 on both sides can be contacted and matched with the corresponding static contact piece 4, in order to reduce the T-shaped movable contact. The friction force between the contact finger 5 and the corresponding static contact finger 4, the U-shaped static contact pieces on the two static contact fingers 4 are installed in the opposite direction, facing the tangent of the corresponding T-shaped movable contact finger 5 in the rotary direction. In order to facilitate the smooth entry of the moving contact into the U-shaped groove of the static contact, this embodiment extends and fixes the limiting plate 8 at the end of the upper groove wall of the U-shaped groove of the static contact seat 1, and under the U-shaped groove A guide plate 19 is extended and fixed at the end of the groove wall. In order to prevent the excessive swing of the moving contact from impacting the static contact during the closing process and improve the stability of the isolating switch, the bottom of the U-shaped groove of the static contact seat 1 is also provided with an elastic spring facing the direction of the notch. Buffer device 13, in this embodiment, the elastic buffer device 13 is mainly composed of a shell fixed on the static contact seat 1, a compression spring axially installed in the shell, and an axial limit fit with the shell and a top match with the compression spring. The ejector rod is composed of the ejector rod, and the ejector rod extends horizontally toward the U-shaped notch of the static contact seat.

In addition, in this embodiment, in order to improve the closing performance of the dynamic and static contacts and enhance the heat dissipation effect of the static contacts, heat sinks 2 are provided at intervals outside the static contact seat 1; The electric arc ablates the moving and static contacts, and an auxiliary static contact 6 is fixed on the outer wall of one end of the static contact seat 1 facing the moving contact, and the auxiliary static contact 6 is connected to the static contact seat 1 through a conductive strip 10, An auxiliary contact finger 12 corresponding to the auxiliary static contact 6 is fixed coaxially at one end of the T-shaped movable contact finger on the conductive rod.

In practical application, in order to strengthen the fixed installation structure of the T-shaped movable contact finger 5 and the auxiliary contact finger 12 on the conductive rod 3, each T-shaped movable contact finger 5 and the auxiliary contact finger 12 are installed and fixed on the conductive rod 3 respectively. Support blocks 11 are fixed on the inner wall of the conductive rod 3 corresponding to the T-shaped movable contact fingers 5 and the auxiliary contact fingers 12 respectively.

The above descriptions are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to this embodiment. All technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention should also be regarded as the protection scope of the present invention.

Claims (5)

1. high voltage isolation switch contact assembly, comprise moving contact and fixed contact, it is characterized in that, described moving contact comprises that the T shape movable contact that is used for radially being fixed on relative both sides, conducting rod end refers to, T shape movable contact refers to be symmetrical arranged along the axis of conducting rod, described fixed contact comprises the stationary contact headstock, side at the stationary contact headstock offers the U-lag mouth, be respectively arranged with the U-shaped static contact finger that cooperates with corresponding T shape movable contact abutment on the cell wall of the both sides up and down of U-lag mouth, the opening direction of described two U-shaped static contact fingers is the tangential direction when corresponding T shape movable contact refers to rotate respectively.

2. high voltage isolation switch contact assembly according to claim 1 is characterized in that, described U-shaped static contact finger is made up of the U-shaped static contact of arranging side by side more than two.

3. high voltage isolation switch contact assembly according to claim 1, it is characterized in that, be provided with elastic buffering mechanism at the bottom land of the U-lag mouth of described stationary contact headstock towards the notch direction, mainly by being fixed on shell on the stationary contact headstock, axially being installed in the compression spring in the shell and cooperate with the shell axial limiting and form with the push rod that join on compression spring top, push rod is towards the U-lag mouth direction horizontal-extending of stationary contact headstock for this elastic buffering mechanism.

4. high voltage isolation switch contact assembly according to claim 1 is characterized in that, is respectively arranged with the top pressure spring that corresponding roof pressure with each described U-shaped static contact cooperates on the cell wall of the both sides up and down of described U-lag mouth.

5. according to any described high voltage isolation switch contact assembly of claim 1 to 4, it is characterized in that, one end outer wall of described each stationary contact headstock is provided with the auxiliary fixed contact that is used for striking, and an end that refers at T shape movable contact is coaxial to be equipped with auxiliary moving contact with auxiliary fixed contact corresponding matching.

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