A high voltage isolating switch

Abstract

A high-voltage disconnector is connected between the isolation intervals of at least one phase busbar, and includes a contact assembly, a moving assembly and a traction assembly. The contact assembly is connected to the traction assembly, and the contact assembly is slidably matched with the busbar through the moving assembly. The traction assembly includes a drone, and the drone can drive the contact assembly to reciprocate between the isolation intervals along the axis direction of the busbar to connect or disconnect the isolation intervals. A high-voltage disconnector of the present invention does not have a complex operating mechanism and transmission mechanism. The contact assembly performs linear reciprocating motion under the cooperation of the moving assembly and the traction assembly. The drone is used to drive the opening and closing of the contact assembly, and the insulator can be further omitted, making its structure and the coordination between the various mechanisms simple, reducing the requirements for assembly accuracy and degree of coordination, and the overall space occupied is small.

Description

Technical Field

[0001] The invention relates to the field of isolating switches, and in particular to a high-voltage isolating switch. Background Art

[0002] High-voltage disconnectors are important switchgear in the electrical systems of power plants and substations. High-voltage disconnectors ensure the safety of high-voltage electrical appliances and devices during maintenance work. Existing high-voltage disconnectors usually have four parts: operating mechanism, transmission device, insulator and main circuit. The operating mechanism outputs power to drive the transmission device to transfer power to the main circuit to realize the opening and closing operation. This structure has the following defects: first, the operating mechanism must be electric, pneumatic or hydraulic type, which is relatively complicated from the working principle to the line layout and structural assembly; second, the transmission device has a variety of structures and many moving joints, and has high assembly requirements, otherwise it is easy to cause poor coordination and affect the transmission effect; third, the main circuit needs to be equipped with insulators for electrical isolation, and it needs to rotate or rotate and translate to realize the opening and closing action, which makes its structure complex, transmission loss large and occupies a large space. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a high-voltage disconnector with a simple structure, small footprint and high reliability.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A high-voltage disconnector is connected between the isolation intervals of at least one phase busbar, comprising a contact assembly, a moving assembly and a traction assembly, wherein the contact assembly is connected to the traction assembly, the contact assembly slidably cooperates with the busbar through the moving assembly, and the traction assembly comprises a drone, which can drive the contact assembly to reciprocate between the isolation intervals along the axial direction of the busbar to connect or disconnect the isolation intervals.

[0006] Furthermore, the busbars at both ends of the isolation interval are provided with hollow cavities, the moving assembly is slidably assembled in one hollow cavity, one end of the contact assembly is connected to the moving assembly, and the other end of the contact assembly is inserted into the other hollow cavity to connect the isolation interval.

[0007] Furthermore, the contact assembly includes at least two conductive contact fingers and a conductor, the conductive contact fingers are respectively assembled in two hollow cavities, the conductor is respectively connected to the traction assembly and the moving assembly, and both ends of the conductor are respectively matched with the conductive contact fingers in the two hollow cavities.

[0008] Furthermore, the conductive contact finger is a spring contact finger, the outer annular surface of the spring contact finger contacts the inner side wall of the hollow cavity, and the inner annular surface of the spring contact finger is for the conductor to slide through.

[0009] Furthermore, the conductor as a whole has a rod structure, and the side walls of the conductor near the two end portions protrude radially to form a first contact portion and a second contact portion, the first contact portion and the second contact portion respectively cooperate with the conductive contact fingers, the moving component is connected to the first contact portion, and the pulling component is connected to the second contact portion.

[0010] Furthermore, a limiting structure is provided on the conductor, and the limiting structure cooperates with the busbar to stop the conductor from being driven by the traction assembly.

[0011] Furthermore, the end of the second contact portion is a conical surface, and a limiting disc is formed by radially protruding from the side wall of the second contact portion at one end away from the conical surface. A connecting structure for connecting to a traction assembly is provided on one side of the limiting disc.

[0012] Furthermore, the moving assembly includes a guide wheel, which is assembled at one end of the contact assembly, and the rolling surface of the guide wheel is in contact with the inner wall of the hollow cavity and moves along the axial direction of the busbar.

[0013] Furthermore, the moving assembly includes a connecting pin, the guide wheel is assembled at one end of the contact assembly, a spherical body is integrally formed at the end of the connecting pin, and the spherical body is slidably matched with the hollow cavity.

[0014] Furthermore, the traction assembly also includes an insulating traction rope, one end of which is connected to the contact assembly, and the other end of which is connected to the drone.

[0015] Compared with the existing high-voltage isolating switches, the high-voltage isolating switch of the present invention does not have a complicated operating mechanism and transmission mechanism. The contact assembly performs linear reciprocating motion under the cooperation of the moving assembly and the traction assembly. The opening and closing of the contact assembly is driven by a drone, which can further omit the insulator, making its structure and the coordination between various mechanisms simple, reducing the requirements for assembly accuracy and degree of coordination, and occupying a small space as a whole.

[0016] In addition, the busbars on both sides of the isolation interval are provided with hollow cavities for assembling moving components. The moving components drive the contact components to cooperate with the busbar to perform piston-like motion. The structure is simple, does not occupy the space between phases and the upper part of the busbar, and the contact components and the busbar have a high degree of coordination. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a high-voltage disconnector of the present invention (opening);

[0018] Figure 2 It is a structural schematic diagram of a high-voltage disconnector of the present invention (closing);

[0019] Figure 3 The present invention is a schematic structural diagram of a contact assembly in a high-voltage disconnect switch. DETAILED DESCRIPTION

[0020] The following is combined with Figures 1 to 3 The given embodiments further illustrate the specific implementation of a high-voltage disconnector of the present invention. The high-voltage disconnector of the present invention is not limited to the description of the following embodiments.

[0021] A high-voltage disconnector is connected between the isolation intervals 12 of at least one phase bus 1, and includes a contact assembly 2, a moving assembly and a traction assembly. The contact assembly 2 is connected to the traction assembly, and the contact assembly 2 slides with the bus 1 through the moving assembly. The traction assembly includes a drone 42, and the drone 42 can drive the contact assembly 2 to reciprocate between the isolation intervals 12 along the axial direction of the bus 1, so that the isolation interval 12 is connected or disconnected.

[0022] Compared with the existing high-voltage isolating switches, a high-voltage isolating switch of the present invention does not have a complicated operating mechanism and a transmission mechanism. The contact assembly 2 performs linear reciprocating motion under the cooperation of the moving assembly and the traction assembly. The contact assembly 2 is driven to open and close by the drone 42, and the insulator can be further omitted, making its structure and the coordination method between various mechanisms simple, reducing the requirements for assembly accuracy and degree of coordination, and the overall space occupied is small.

[0023] Combination Figure 1-3 Provided is an optimal embodiment of a high-voltage disconnector, the high-voltage disconnector includes an isolating interval 12 connected to at least one phase busbar 1, including a contact assembly 2, a moving assembly and a traction assembly. Preferably, hollow cavities 11 are provided at the ends of the busbar 1 on both sides of the isolating interval 12, that is, a hollow busbar 1 is used or a hollow busbar 1 is used only in an area close to the isolating interval 12, the inner wall of the hollow cavity 11 is an arc surface, and an insulating material resistant to high temperature and deformation is used; the moving assembly is slidably assembled in a hollow cavity 11, one end of the contact assembly 2 is connected to the moving assembly, when the isolating interval 12 is turned on by the contact assembly 2, the other end of the contact assembly 2 can be inserted into another hollow cavity 11, and when the isolating interval 12 is disconnected, the other end of the contact assembly 2 is moved out from the other hollow cavity 11.

[0024] Specific as Figure 1 , 3 As shown, the contact assembly 2 includes at least two conductive contact fingers 22 and a conductor 21. The conductive contact fingers 22 are respectively assembled in two hollow cavities 11. The two ends of the conductor 21 are respectively used to cooperate with the conductive contact fingers 22. The conductor 21 is respectively connected to the moving assembly and the pulling assembly, so that the contact assembly 2 can move linearly between the isolation interval 12 under the action of the moving assembly and the pulling assembly to achieve the connection or disconnection of the isolation interval 12.

[0025] In this embodiment, the conductive contact finger 22 can be a spring contact finger or a strap contact finger. The conductive contact finger 22 is made of a special copper alloy conductive material. The outer ring surface of the conductive contact finger 22 is in contact with the inner wall of the hollow cavity 11 of the busbar 1. The inner ring surface of the conductive contact finger 22 is for the conductor 21 to pass through. When the conductor 21 slides through the conductive contact finger 22, it maintains contact with the inner ring surface to achieve electrical connection.

[0026] The conductor 21 is in the form of a rod structure as a whole. The conductor 21 can be made of high-quality conductive materials such as pure copper or aluminum alloy. The side walls of the conductor 21 near the two end portions radially protrude to form a first contact portion 211 and a second contact portion 212. At this time, an annular boss is formed at both ends of the conductor 21, so that the conductor 21 as a whole is in the form of a rod structure with thick ends and thin middle. When the conductor 21 passes through the inner annular surface of the conductive contact finger 22, the circumferential side walls of the first contact portion 211 and the second contact portion 212 are respectively used to contact and cooperate with the inner annular surfaces of the conductive contact fingers 22 in the two hollow cavities 11. The moving component is connected to the first contact portion 211, and the pulling component is connected to the second contact portion 212. The second contact portion 212 moves between the isolation interval 12 under the joint action of the moving component and the pulling component. When the first contact portion 211 and the second contact portion 212 are in contact with the conductive contact fingers 22 in the two hollow cavities 11 at the same time, the conductor 21 turns on the isolation interval 12 (see Figure 2 ), when the second contact portion 212 of the conductor 21 is no longer in contact with the conductive contact finger 22, Figure 1 In the figure, the conductor 21 moves to the right as a whole, and the first contact portion 211 and the second contact portion 212 move away from the isolation gap 12 along with the moving component, and the isolation gap 12 is disconnected (see Figure 1 ), the first contact portion 211 maintains sliding contact with the conductive contact finger 22 in the hollow cavity 11, or the first contact portion 211 is completely located in the hollow cavity 11, and the thinner rod of the conductor 21 passes through the inner annular surface of the conductive contact finger 22; the end of the second contact portion 212 is set as a conical surface, and the conical surface of the second contact portion 212 is convenient for inserting into the inner annular surface of the spring contact finger.

[0027] Further, such as Figure 3 As shown, a limiting structure is also provided on the conductor 21, and the conductor 21 cooperates with the busbar 1 through the limiting structure, so that the conductor 21 stops being driven by the traction assembly. In this embodiment, it is preferred that the side wall of the second contact portion 212 away from one end of the conical surface protrudes radially to form a limiting disk 213, and the diameter of the limiting disk 213 is larger than the inner diameter of the hollow cavity 11. When the conductor 21 moves between the isolation intervals 12, the limiting disk 213 cooperates with the busbar 1 to stop the conductor 21, thereby preventing the conductor 21 from being inserted into the hollow cavity 11 as a whole.

[0028] The moving assembly includes a connecting pin 32 and a guide wheel 31, and the guide wheel 31 is assembled at one end of the contact assembly 2 through the connecting pin 32. In this embodiment, the guide wheel 31 is assembled at the end of the first contact portion 211, and the rolling surface of the guide wheel 31 is in contact with the inner wall of the hollow cavity 11 and moves along the axial direction of the busbar 1, so that the conductor 21 can be prevented from having unnecessary shaking in the hollow cavity 11; further, a guide rail can be provided on the inner wall of the hollow cavity 11, and the guide wheel 31 moves along the guide rail, which is conducive to ensuring that the guide wheel 31 moves axially along the busbar 1 and prevents the guide wheel 31 from rotating in other directions. Of course, in this example, the guide wheel 31 of the moving assembly can also be other structures that can slide with the hollow cavity 11, for example, one end of the connecting pin 32 is connected to the contact assembly 2, and a spherical body is integrally formed at the end of the connecting pin 32, and the spherical body slides with the hollow cavity 11, but the friction force generated by the sliding fit is larger than the rolling friction force of the guide wheel 31, and the power requirement of the traction assembly is higher. The moving assembly of such a structure is assembled in the hollow cavity 11 of the busbar 1. The conductor 21 moves along the axial direction of the busbar 1 and can perform linear reciprocating motion between the isolation intervals 12 with the moving assembly, avoiding occupying the space between phases and the upper part of the busbar 1. The structure is simple, economical and environmentally friendly.

[0029] The traction assembly includes an insulating traction rope 41 and a drone 42, one end of the insulating traction rope 41 is connected to the contact assembly 2, and the other end is connected to the traction equipment. In this embodiment, a connecting structure 214 is provided on one side of the limit disk 213 for connecting to the insulating traction rope 41; the drone 42 can select a universal drone 42, and a hook connected to the insulating traction rope 41 is installed on the drone 42. When the high-voltage disconnector is connected to a multi-phase main circuit, each phase of the main circuit can be controlled by the same drone 42, or can be synchronously controlled by multiple drones 42.

[0030] Another embodiment of a high-voltage disconnector is provided (not shown). In this embodiment, the moving assembly is omitted. The high-voltage disconnector includes a contact assembly 2 and a traction assembly. The structures of the contact assembly 2 and the traction assembly are the same as those of the first embodiment. The traction assembly pulls the conductor 21 in the contact assembly 2 to perform linear reciprocating motion between the isolation intervals 12. Since the moving assembly is omitted, when the first contact portion 211 of the conductor 21 moves away from the isolation interval 12, the side wall of the first contact portion 211 directly cooperates with the inner side wall of the hollow cavity 11. Since the inner side wall of the hollow cavity 11 is made of insulating material, the first contact portion 211 is directly engaged with the inner side wall of the hollow cavity 11. When the first contact portion 211 cooperates with the inner wall of the hollow cavity 11, the isolation gap 12 will not be connected. The cost and assembly difficulty of this embodiment are lower than those of the first embodiment, but there may be defects. For example, when the outer diameter of the first contact portion 211 is the same as the inner diameter of the hollow cavity 11, there may be a large friction force, and the power requirement of the traction component is high. When the outer diameter of the first contact portion 211 is smaller than the inner diameter of the hollow cavity 11, the side wall of the first contact portion 211 cannot be completely fitted with the inner wall of the hollow cavity 11, which may cause the conductor 21 to shake in the hollow cavity 11. In addition, it may also affect the cooperation with the conductive contact finger 22, and there is a risk of poor cooperation.

[0031] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A high voltage disconnector, connected between the isolation compartments (12) of at least one phase busbar (1), characterized in that: The invention comprises a contact assembly (2), a moving assembly and a traction assembly, wherein the contact assembly (2) is connected to the traction assembly, the contact assembly (2) is slidably matched with a busbar (1) via the moving assembly, and the traction assembly comprises a drone (42), wherein the drone (42) can drive the contact assembly (2) to reciprocate between the isolation intervals (12) along the axial direction of the busbar (1), so that the isolation intervals (12) are connected or disconnected.

2. A high voltage disconnect switch according to claim 1, characterized in that: The busbars (1) at both ends of the isolation interval (12) are provided with hollow cavities (11), a movable assembly is slidably assembled in one of the hollow cavities (11), one end of the contact assembly (2) is connected to the movable assembly, and when the other end of the contact assembly (2) is inserted into the other hollow cavity (11), the isolation interval (12) is connected.

3. A high voltage disconnector according to claim 2, characterized in that: The contact assembly (2) comprises at least two conductive contact fingers (22) and a conductor (21); the conductive contact fingers (22) are respectively mounted in two hollow cavities (11); the conductor (21) is respectively connected to a traction assembly and a moving assembly; and two ends of the conductor (21) are respectively matched with the conductive contact fingers (22) in the two hollow cavities (11).

4. A high voltage disconnector according to claim 3, characterized in that: The conductive contact finger (22) is a spring contact finger, the outer annular surface of the spring contact finger contacts the inner wall of the hollow cavity (11), and the inner annular surface of the spring contact finger is for the conductor (21) to slide through.

5. A high voltage disconnector according to claim 3, characterized in that: The conductor (21) is in the form of a rod structure as a whole. The side walls of the conductor (21) close to both ends protrude radially to form a first contact portion (211) and a second contact portion (212). The first contact portion (211) and the second contact portion (212) are respectively matched with the conductive contact finger (22). The moving component is connected to the first contact portion (211), and the pulling component is connected to the second contact portion (212).

6. A high voltage disconnector according to claim 3, characterized in that: A limiting structure is provided on the conductor (21), and the limiting structure cooperates with the busbar (1) to stop the conductor (21) from being driven by the traction assembly.

7. A high voltage disconnector according to claim 5, characterized in that: The end of the second contact portion (212) is a conical surface, and a limiting disc (213) is formed by radially protruding from a side wall of the second contact portion (212) at one end away from the conical surface. A connecting structure (214) for connecting to a traction component is provided on one side of the limiting disc (213).

8. A high voltage disconnector according to claim 2, characterized in that: The moving assembly comprises a guide wheel (31), which is mounted on one end of the contact assembly (2), and the rolling surface of the guide wheel (31) is in contact with the inner wall of the hollow cavity (11) and moves along the axial direction of the busbar (1).

9. A high voltage disconnector according to claim 8, characterized in that: The moving assembly comprises a connecting pin (32), the guide wheel (31) is assembled at one end of the contact assembly (2), a spherical body is integrally formed at the end of the connecting pin (32), and the spherical body is slidably matched with the hollow cavity (11).

10. A high voltage disconnector according to claim 1 or 2, characterized in that: The traction assembly further comprises an insulating traction rope (41), one end of the insulating traction rope (41) being connected to the contact assembly (2) and the other end of the insulating traction rope (41) being connected to the drone (42).

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