An isolating switch

Abstract

The present invention discloses an isolating switch, comprising a current-carrying conductor column, a knife arm fixedly connected to the current-carrying conductor column, and a shaft buckle card detachably connected to the bottom of the current-carrying conductor column; the shaft buckle card comprises a stainless steel card, a blue steel sleeve matched with the stainless steel card, and a screw for fixing. The isolating switch provided by the present invention has a shaft buckle card added to the bottom of the current-carrying conductor column. The shaft buckle card cooperates with the base, and the knife switch can rotate freely. At the same time, the shaft buckle card is combined with the original knife switch retaining spring to fix the position of the current-carrying conductor column to prevent it from detaching from the outlet seat, thereby increasing its fixation. At the same time, the shaft buckle card is installed on the surface of the base, and it can be installed by simply removing the screws, which is convenient for later maintenance personnel to inspect and replace it.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply and distribution, and in particular to an isolating switch. Background Art

[0002] The isolating knife switch is one of the important equipment in the power system and an important part of the substation. During the long-term operation of the isolating knife switch, it must ensure its own safety and reliability in order to further ensure the safe operation of the power grid. The currently commonly used SR16200 type isolating switches of Spico all use the method of fastening the current-carrying conductor column with a retaining spring to prevent it from falling off. However, the isolating switch has a design defect. After the current-carrying conductor column is inserted into the contact finger, it only relies on the retaining spring to prevent it from falling out of the air of the knife arm. After the knife switch has been running for a long time, the retaining spring is prone to breakage, which will cause the current-carrying conductor column to fall off from the contact finger. When the equipment is operating normally, this situation will directly cause arc discharge and cause the switch protection action. In addition, the retaining spring is located between the current-carrying conductor column and the knife arm. During normal use, the current-carrying conductor column is inserted into the contact finger. To check the retaining spring, the current-carrying conductor column must be pulled out of the contact finger. The process is cumbersome and it is not convenient for maintenance personnel to observe the overall situation of the retaining spring. Therefore, it is urgent to develop a new type of isolating switch that can effectively prevent the retaining spring from breaking and facilitate the observation of the retaining spring. Summary of the invention

[0003] The purpose of the present invention is to solve the defects of the prior art that the retaining spring is easy to break, the operation is cumbersome, and the observation is difficult. A disconnector is provided, and a shaft buckle clamp is added at the bottom of the current-carrying conductor column. The shaft buckle clamp cooperates with the base, and the knife switch can rotate freely. At the same time, the shaft buckle clamp is combined with the original knife switch retaining spring to fix the position of the current-carrying conductor column to prevent it from being separated from the outlet seat.

[0004] In order to achieve the above object, the present invention is implemented by the following scheme:

[0005] A disconnector comprises a current-carrying conductor column, a knife arm fixedly connected to the current-carrying conductor column, and a shaft buckle card detachably connected to the bottom of the current-carrying conductor column; the shaft buckle card comprises a stainless steel card, a blue steel sleeve matched with the stainless steel card, and screws for fixing.

[0006] In the isolating switch provided by the present invention, the shaft buckle clamp is made of copper alloy (stainless steel card and blue steel sleeve), which can effectively reduce electrochemical reactions and improve strength, and its own strength is much higher than that of the original retaining spring. Among them, the stainless steel card and the base are pressed against each other to play an overall fixing role to prevent the shaft buckle clamp from shifting; the blue steel sleeve and the stainless steel card cooperate with each other to improve the strength of the shaft buckle clamp. In summary, the shaft buckle clamp and the base are interlocked, and the knife switch can rotate freely. At the same time, the shaft buckle clamp is combined with the original knife switch retaining spring to fix the position of the current-carrying conductor column to prevent it from detaching from the outlet seat, thereby increasing its fixation. At the same time, the shaft buckle clamp is installed on the surface of the base. It can be installed by simply removing the screws, which is convenient for later maintenance personnel to inspect and replace it.

[0007] Preferably, the current-carrying conductor column is a copper shaft.

[0008] Preferably, the shaft buckle clamp is detachably connected to the current-carrying conductor column by means of screws.

[0009] Preferably, a fixing through hole is provided at the bottom of the current-carrying conductor column, and an internal thread matched with a screw is provided inside the fixing through hole. In addition, by providing a fixing through hole at the bottom of the current-carrying conductor column, the conductive part area of ​​the knife switch will not be reduced.

[0010] Preferably, the isolating switch further comprises a base fixedly connected to the bottom of the current-carrying conductor column, and the stainless steel card is engaged with the base. More preferably, the base is an aluminum base.

[0011] Preferably, the inner diameter of the base matches the outer diameter of the stainless steel card.

[0012] Preferably, the upper portion of the stainless steel card is provided with an outer edge, the interior is provided with a groove matching with the bottom of the blue steel sleeve, and the middle of the groove is provided with a through hole allowing a screw to pass through.

[0013] Preferably, the blue steel sleeve is interlocked and connected with the stainless steel card.

[0014] Preferably, the inner diameter of the stainless steel card matches the outer diameter of the blue steel sleeve.

[0015] Preferably, a through hole is provided inside the blue steel sleeve to allow the screw to pass through.

[0016] Preferably, the screw is a countersunk stainless steel hexagon socket screw.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The isolating switch provided by the present invention has an additional shaft buckle fixture at the bottom of the current-carrying conductor column. The shaft buckle fixture cooperates with the base, and the knife switch can rotate freely. At the same time, the shaft buckle fixture is combined with the original knife switch retaining spring to fix the position of the current-carrying conductor column to prevent it from being separated from the outlet seat, thereby increasing its fixation. At the same time, the shaft buckle fixture is installed on the surface of the base, and it can be installed by simply removing the screws, which is convenient for later maintenance personnel to inspect and replace it. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of the isolating switch of the present invention.

[0020] Figure 2 It is a partial cross-sectional view of the isolating switch of the present invention.

[0021] Figure numerals: 1-base; 2-current-carrying conductor column; 3-stainless steel card; 4-blue steel sleeve; 5-screw; 6-blade arm. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and specific examples of the specification. The examples are only used to explain the present invention and are not used to limit the scope of the present invention. The test methods used in the following examples are conventional methods unless otherwise specified; the materials and reagents used are reagents and materials that can be obtained from commercial channels unless otherwise specified.

[0023] Example 1

[0024] A disconnector comprises a current-carrying conductor column 2, a knife arm 6 fixedly connected to the current-carrying conductor column 2, and a shaft buckle card detachably connected to the bottom of the current-carrying conductor column 2; the shaft buckle card comprises a stainless steel card 3, a blue steel sleeve 4 matched with the stainless steel card, and a screw 5 for fixing.

[0025] In the isolating switch described in this embodiment, the shaft buckle clamp is made of copper alloy (stainless steel card 3 and blue steel sleeve 4), which can effectively reduce electrochemical reactions and improve strength. Its own strength is much higher than that of the original retaining spring. Among them, the stainless steel card 3 and the base 1 are pressed against each other to play an overall fixing role to prevent the shaft buckle clamp from shifting; the blue steel sleeve 4 and the stainless steel card 3 cooperate with each other to improve the strength of the shaft buckle clamp. In summary, the shaft buckle clamp and the base 1 are interlocked, and the knife switch can rotate freely. At the same time, the shaft buckle clamp is combined with the original knife switch retaining spring to fix the position of the current-carrying conductor column 2 to prevent it from detaching from the outlet seat, thereby increasing its fixation. At the same time, the shaft buckle clamp is installed on the surface of the base 1. It only needs to remove the screw 5 to install it, which is convenient for later maintenance personnel to inspect and replace it.

[0026] The current-carrying conductor column 2 is a copper shaft.

[0027] The shaft buckle clamp is detachably connected to the current-carrying conductor column 2 via a screw 5 .

[0028] The bottom of the current-carrying conductor column 2 is provided with a fixing through hole, and the inside of the fixing through hole is provided with an internal thread matched with the screw 5. In addition, by providing the fixing through hole at the bottom of the current-carrying conductor column 2, the conductive part area of ​​the knife switch will not be reduced.

[0029] The isolating switch further comprises a base 1 fixedly connected to the bottom of the current-carrying conductor column 2, and the stainless steel card 3 is engaged and connected with the base 1. In addition, the base 1 is an aluminum base.

[0030] The inner diameter of the base 1 matches the outer diameter of the stainless steel card 3 , so that the stainless steel card 3 and the base 1 are pressed against each other.

[0031] The upper part of the stainless steel card 3 is provided with an outer edge, and the inside is provided with a groove matched with the bottom of the blue steel sleeve 4, and the middle of the groove is provided with a through hole allowing the screw 5 to pass through.

[0032] The blue steel sleeve 4 is embedded and connected with the stainless steel card 3.

[0033] The inner diameter of the stainless steel card 3 matches the outer diameter of the blue steel sleeve 4 .

[0034] The blue steel sleeve 4 is provided with a through hole inside to allow the screw 5 to pass through, so that the screw 5 passes through the blue steel sleeve 4 and the stainless steel card 3 in sequence, and fixes the shaft buckle card to the bottom of the current-carrying conductor column 2.

[0035] The screws are countersunk stainless steel hexagon socket screws.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. For ordinary technicians in this field, other different forms of changes or modifications can be made based on the above descriptions and ideas. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An isolating switch, characterized in that: It includes a current-carrying conductor column, a knife arm rotatably connected to the current-carrying conductor column, a shaft buckle card and a retaining spring detachably connected to the bottom of the current-carrying conductor column; the shaft buckle card includes a stainless steel card, a blue steel sleeve matching the stainless steel card and a screw for fixing; the shaft buckle card is detachably connected to the current-carrying conductor column through the screw; a fixing through hole is provided at the bottom of the current-carrying conductor column, and an internal thread matching the screw is provided inside the fixing through hole; the isolating switch also includes a base fixedly connected to the bottom of the current-carrying conductor column; the retaining spring is located between the current-carrying conductor column and the knife arm; the shaft buckle card and the retaining spring are combined to fix the position of the current-carrying conductor column to prevent the current-carrying conductor column from detaching from the base.

2. The isolating switch according to claim 1, characterized in that: The stainless steel card is embedded and connected with the base.

3. The isolating switch according to claim 2, characterized in that: The inner diameter of the base matches the outer diameter of the stainless steel card.

4. The isolating switch according to claim 2, characterized in that: The upper part of the stainless steel card is provided with an outer edge, the inner part is provided with a groove matched with the bottom of the blue steel sleeve, and the middle of the groove is provided with a through hole allowing a screw to pass through.

5. The isolating switch according to claim 4, characterized in that: The blue steel sleeve is embedded and connected with the stainless steel card.

6. The isolating switch according to claim 5, characterized in that: The inner diameter of the stainless steel card matches the outer diameter of the blue steel sleeve.

7. The isolating switch according to any one of claims 1 to 6, characterized in that: The screws are countersunk stainless steel hexagon socket screws.

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