CN202260234U - A grounding transition plate and a grounding switch using the grounding transition plate - Google Patents

Abstract

The utility model discloses a cab apron is crossed in ground connection and use this kind of ground connection to cross the earthing switch of cab apron, including casing and crank box, be provided with the drive crank in the crank box and by drive crank driven three-phase moving contact, arrange the middle conductive contact with three-phase moving contact conductive contact in the casing, still be provided with in the casing be used for with three-phase moving contact break-make complex three-phase static contact, be provided with the ground connection between casing and the crank box and cross the cab apron, the cab apron is crossed including electrically conductive platelike base member in ground connection in platelike base member on the corresponding position department of three-phase moving contact be equipped with the three perforation that supplies the three-phase moving contact to pass, be provided with in every perforated circumference outside on platelike base member with installation department on the cab apron is crossed to the three-phase middle conductive contact fixed mounting, still is provided with the ground connection derivation portion that is used. The grounding transition plate is adopted to replace the grounding insulator of the existing grounding switch, so that the cracking of the grounding insulator is effectively avoided, and the safety of the grounding switch is improved.

Description

A grounding transition plate and a grounding switch using the grounding transition plate

technical field

The utility model belongs to the technical field of high-voltage electrical appliances, and relates to a grounding transition plate used when a linear grounding switch is safely grounded, and also relates to a grounding switch. the

Background technique

At present, the high-voltage gas-insulated switchgear with three-phase common tank in the power system, that is, the linear grounding switch on the GIS product, is mainly used for the linear grounding of the main circuit. The linear grounding switch must meet the following functions: 1. Working grounding, suitable for static electricity and the ability of the electromagnetic induction ammeter to close the peak current; 2. When measuring resistance and debugging the characteristics of the circuit breaker, the main circuit is insulated from the main body to facilitate the introduction of signals. The linear grounding switch used in the high-voltage GIS mainly includes a shell and a crank box, and a disc insulator as a linear grounding insulator is arranged between the shell and the crank box, and a three-phase central conductor is embedded in the disc insulator. The arm box is provided with a driving crank arm, which is used to drive the action of the three-phase moving contact in the arm box, and the housing is provided with three three-phase intermediate contacts for reliable contact and conduction with the three-phase moving contact. The three-phase moving contacts in the crank box pass through the linear grounding insulator and are always in reliable conductive contact with the three-phase intermediate conductive contacts. There are also three-phase static contacts in the housing for conductive connection with the three-phase moving contacts. When the three-phase moving contact is driven by the driving arm, the three-phase moving contact is electrically connected or disconnected from the three-phase static contact in the housing, so that the middle conductive contact is electrically connected to the three-phase static contact Or disconnect, and realize grounding when the middle conductive contact is electrically connected with the three-phase static contact. After the three-phase moving contact, the three-phase intermediate conductive contact and the corresponding static contact are electrically connected, the three-phase central conductor in the linear grounding insulator is in reliable conductive contact with the three-phase static contact through the three-phase intermediate conductive contact , the three-phase central conductor is drawn out at the lead-out port of the grounding switch. Because the coefficient of expansion of the material constituting the linear ground insulator is quite different from that of the center conductor material, when the above-mentioned ground switch equipped with such a linear ground insulator is used in a low-temperature environment, as the temperature changes, the linear ground insulator is likely to appear due to heat. The uneven internal stress caused by expansion and contraction leads to cracking, which affects the normal use of the linear grounding switch. the

Utility model content

The purpose of the utility model is to provide a grounding transition plate for electrically grounding the intermediate conductive contact with a simple structure and not easily cracked by the external environment; at the same time, the utility model also provides a grounding switch using the above-mentioned grounding transition plate . the

In order to achieve the above purpose, the grounding transition plate provided by the utility model adopts the following technical scheme: a grounding transition plate, including a conductive plate-shaped base, and a three-phase moving contact for the grounding switch to pass through on the plate-shaped base. There are three through-holes through the plate-shaped substrate, and a mounting part for fixing and installing the three-phase intermediate conductive contact of the grounding switch is provided on the outer side of the plate-shaped base corresponding to each of the perforated holes. The grounding lead-out part. the

The plate-shaped base is a waist-shaped base, and the three perforations are sequentially arranged along the long axis of the waist-shaped base. the

On both sides of the plate-shaped base body, a sealing ring groove is correspondingly opened on the outer side of each perforation in the circumferential direction, and the sealing ring groove is located on the plate-shaped base body for fixing and installing the mounting part of the intermediate conductive contact. the circumferential outer side. the

The grounding switch provided by the utility model adopts the above-mentioned technical scheme: a grounding switch using a grounding transition plate, including a housing and a crank box, and a driving crank and a three-phase switch driven by the driving crank are arranged in the crank box. The moving contact, the three-phase moving contact extends into the casing, and the middle conductive contact that is in conductive contact with the three-phase moving contact is arranged in the casing, and the casing is also provided with a three-phase A three-phase static contact with on-off matching of the phase-moving contacts, a grounding transition plate is provided between the housing and the crank box, and the grounding transition plate includes a conductive plate-shaped base, on which the plate-shaped base is connected to the Three perforations are provided at the corresponding positions of the three-phase movable contacts for the three-phase movable contacts to pass through, and on the plate-shaped base body, on the outer side of each perforated hole, there is a device for fixing the three-phase intermediate conductive contacts. The mounting part installed on the grounding transition plate, the plate-shaped base is also provided with a grounding lead-out part for grounding. the

The plate-shaped base is a waist-shaped base, and the three perforations are sequentially arranged along the long axis of the waist-shaped base. the

On both sides of the plate-shaped base body, a sealing ring groove is correspondingly opened on the outer side of each perforation in the circumferential direction, and the sealing ring groove is located on the plate-shaped base body for fixing and installing the mounting part of the intermediate conductive contact. On the outer side of the circumferential direction, sealing rings are arranged in the sealing ring grooves. the

The beneficial effects of the utility model are: the grounding transition plate provided by the utility model includes a conductive plate-shaped base, and three perforations for the three-phase moving contacts to pass through are arranged on the plate-shaped base, and the plate-shaped base is also provided with There is a mounting part for installing the intermediate conductive contact, and a grounding lead-out part is also provided on the plate-shaped base, so that when the grounding transition plate is installed between the casing of the grounding switch and the crank arm box, the crank The three-phase moving contacts in the arm box pass through the three perforations of the plate-shaped base and are in sliding conductive contact with the three-phase intermediate conductive contacts. When the three-phase static contacts are on and off, when the three-phase moving contacts are connected to the three-phase static contacts, the three-phase static contacts are safely grounded through the three-phase moving contacts, the three-phase intermediate conductive contacts, and the grounding transition plate , to realize the safety grounding function of the grounding switch. The grounding transition plate is used as the grounding lead-out part of the grounding switch, which effectively avoids the cracking of the original grounding insulator. The grounding transition plate is a conductive plate, which will not cause cracking accidents due to temperature differences in the places where the grounding switch is applied. The safety of the grounding switch prolongs the service life of the grounding switch. the

The grounding transition plate provided by the utility model is applied to the grounding switch, and is suitable for the safety grounding switch. The shell is connected with the three-phase intermediate conductive contact by sliding and conductive plugging, and the crank arm is driven to drive the three-phase moving contact to realize the on-off of the three-phase moving contact and the three-phase static contact in the shell. When the contact is in contact with the three-phase static contact, the three-phase static contact realizes safe grounding through the three-phase moving contact, the three-phase intermediate conductive contact, and the grounding transition plate to ensure the safety of the grounding switch. the

Description of drawings

Fig. 1 is a structural schematic diagram of a grounding switch;

Fig. 2 is the K direction view among Fig. 1;

Fig. 3 is a sectional view at A-A in Fig. 1 .

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 3, a grounding transition plate 1 is provided between the housing 3 and the crank box 4, and the grounding transition plate includes a conductive plate-shaped substrate, and the plate-shaped substrate in this embodiment is The waist-shaped plate-shaped base is provided with three perforations 10 for the three-phase moving contacts of the grounding switch to pass through the plate-shaped base. The three perforations 10 are arranged in sequence along the long axis of the waist-shaped base. A mounting part 11 for fixing and installing the three-phase intermediate conductive contact of the grounding switch is provided on the outer side of the plate-shaped substrate corresponding to each perforation. The mounting part 11 here is a mounting flange, and the mounting flange is provided with The screw mounting hole is provided with a grounding lead-out part for grounding on the grounding transition plate, and the grounding lead-out part here can be set at a position convenient for grounding. the

Because the grounding transition board is applied on the grounding switch, and because the three-phase moving contacts in the crank box of the grounding switch protrude from the crank box and extend into the shell, it is necessary to connect the shell and the crank arm The corresponding position of the box is provided with assembly holes, so that when the ground transition plate is assembled between the shell and the crank box for conducting and grounding, it is necessary to provide a seal between the ground transition plate, the shell, and the crank box structure, because the three perforations corresponding to the three-phase moving contacts on the ground transition plate correspond to the assembly holes on the crank box and the housing, so on the two sides of the plate-shaped base, the circumferential outer sides of each perforation are respectively Correspondingly, a sealing ring groove is opened, and the sealing ring groove is located on the circumferential outer side of the installation part for fixing and installing the intermediate conductive contact on the plate-shaped base body. When the ground transition plate is assembled between the shell and the crank box, Sealing is achieved by installing a seal ring in the seal ring groove of the ground transition plate. the

As shown in Figure 1, Figure 2, and Figure 3, a grounding switch includes a crank box 4 and a housing 3, and a ground transition plate is arranged between the crank box 4 and the housing 3, and in the crank box 4 The driving arm 9 and the three-phase moving contact assembly driven by the driving arm 9 are provided. The three-phase moving contact assembly includes a transmission structure connected with the driving arm and a synchronously acting three-phase moving contact 5. The body 3 is provided with a three-phase intermediate conductive contact 2 corresponding to the three-phase movable contact in the crank box, where the three-phase intermediate conductive contact 2 is fixedly arranged on the grounding transition plate. The housing is also provided with a three-phase static contact (not shown in the figure) for on-off cooperation with the three-phase moving contact. The structure of the ground transition plate in this embodiment is the same as that of the above-mentioned ground transition plate embodiment. I won’t go into details here, because the three-phase moving contacts in the crank box extend out of the crank box and extend into the housing, so that there are three-phase contacts at the corresponding positions of the crank box and the housing. The assembly hole through which the moving contact passes, and the grounding transition plate is assembled between the crank box and the housing. At this time, the through hole 10 on the grounding transition plate for the three-phase moving contact to pass through is connected with the crank box and the housing Corresponding to the assembly holes on the grounding switch, in order to ensure the performance of the grounding switch, a sealing structure is provided between the grounding transition plate, the crank box and the shell, and the sealing structure here includes the two sides of the plate-shaped base of the grounding transition plate. A sealing ring groove, and a sealing ring 6 is arranged in the sealing ring groove. And a grounding assembly 8 is provided on the grounding lead-out portion of the grounding transition plate for realizing grounding. the

When the grounding switch in the above embodiment is used, because the three-phase moving contact is always in conductive contact with the three-phase middle conductive contact in the housing, and the middle conductive contact is always in conductive communication with the grounding transition plate, so when the driving arm is driven When the three-phase moving contact moves to make contact with the three-phase static contact (not shown in the figure) in the housing, the three-phase static contact passes through the three-phase moving contact, the three-phase intermediate conductive contact, and the grounding transition. The plate realizes conductive grounding, and because both the crank box and the shell are in conductive contact with the ground transition plate, the safe grounding of the crank box and the shell is realized. the

The grounding switch in this embodiment is a safety grounding switch. It is a linear grounding switch that does not need to take signals. Therefore, the grounding transition plate can be used as a grounding insulator. On the premise of ensuring the normal operation of the grounding switch, it effectively avoids the The cracking of the grounding insulator improves the safety and service life of the grounding switch. the

Claims (6)

1. ground connection rebound; It is characterized in that: the panel-shaped base body that comprises conduction; On panel-shaped base body, be provided with three perforation that the three-phase moving contact that is used to supply earthed switch passes; On panel-shaped base body, be useful on the installation portion of conductive contact in the middle of the three-phase of fixed installation earthed switch, also be provided with the ground connection lead division that is used for ground connection on the described panel-shaped base body corresponding to the circumferential arranged outside of each perforation.

2. ground connection rebound according to claim 1 is characterized in that: described panel-shaped base body is a waist shape matrix, and described three perforation are arranged along the long axis direction of waist shape matrix successively.

3. ground connection rebound according to claim 1 and 2; It is characterized in that: on the two sides of described panel-shaped base body in week of each perforation laterally respectively correspondence offer closure gasket groove, described closure gasket groove be positioned at be used for fixing on the said panel-shaped base body install in the middle of conductive contact installation portion week laterally.

4. earthed switch; Comprise housing and connecting lever box; In the connecting lever box, be provided with the three-phase moving contact that drives connecting lever and drive by the driving connecting lever; Described three-phase moving contact extends in the housing; In housing, be furnished with the middle conductive contact that contacts with three-phase moving contact conduction, also be provided with in the described housing and be used for the three-phase fixed contact that cooperates with the three-phase moving contact break-make, it is characterized in that: be provided with the ground connection rebound between described housing and the connecting lever box; This ground connection rebound comprises the panel-shaped base body of conduction; On panel-shaped base body, be provided with three perforation that supply three-phase moving contact to pass in described three-phase moving contact opposite position place, on the panel-shaped base body in the middle of the circumferential arranged outside of each perforation has said three-phase conductive contact be fixedly mounted on the installation portion on the ground connection rebound, also be provided with the ground connection lead division that is used for ground connection on the described panel-shaped base body.

5. earthed switch according to claim 4 is characterized in that: described panel-shaped base body is a waist shape matrix, and described three perforation are arranged along the long axis direction of waist shape matrix successively.

6. according to claim 4 or 5 described earthed switches; It is characterized in that: on the two sides of described panel-shaped base body in week of each perforation laterally respectively correspondence offer closure gasket groove; Described closure gasket groove be positioned at be used for fixing on the said panel-shaped base body install in the middle of conductive contact installation portion week laterally, in described closure gasket groove, be provided with sealing ring.

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