A high-voltage isolating switch

Abstract

A high-voltage disconnector includes a support structure and an isolation mechanism, a transmission mechanism, and an operating mechanism disposed on the support structure. The isolation mechanism corresponds to at least one phase busbar, and the transmission mechanism is linked to the isolation mechanism and the operating mechanism. The isolation mechanism includes a moving contact corresponding to each phase busbar, and a static contact cooperating with the moving contact is disposed on the busbar. The transmission mechanism drives the moving contact to perform linear reciprocating motion under the drive of the operating mechanism to complete the opening and closing action. Unlike the existing main circuit rotary opening and closing action, the high-voltage disconnector of the present invention, under the action of the operating mechanism and the transmission mechanism, causes the moving contact to complete the opening and closing action by performing linear reciprocating motion. The linear motion of the moving contact does not occupy the space between phases, thus avoiding the overall space occupation being too large. In addition, the coordination of the various mechanisms is simple, which is conducive to improving the installation quality.

Description

Technical Field

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

[0002] High-voltage disconnectors are crucial switchgear in the electrical systems of power plants and substations, ensuring the safety of high-voltage electrical equipment and devices during maintenance. Existing high-voltage disconnectors operate by rotating the main circuit. The main circuit is equipped with terminals and insulators, with each phase having at least two insulators. At least one of these insulators rotates and is subject to torque or bending moments. Due to the need to meet insulation distance requirements, the disconnector structure is oversized, occupying excessive space during opening and closing operations. This can also lead to poor coordination and compromised installation quality. 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 space occupation and easy assembly.

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

[0005] A high-voltage disconnect switch comprises an isolation mechanism, a transmission mechanism and an operating mechanism. The isolation mechanism corresponds to at least one phase busbar, and the transmission mechanism is linked to the isolation mechanism and the operating mechanism respectively. The isolation mechanism comprises a moving contact corresponding to each phase busbar respectively, and a static contact cooperating with the moving contact is arranged on the busbar. The transmission mechanism drives the moving contact to perform linear reciprocating motion under the drive of the operating mechanism to complete the opening and closing action.

[0006] Furthermore, the isolation mechanism further includes at least one insulator, and a phase moving contact is correspondingly provided on each insulator.

[0007] Furthermore, the isolation mechanism also includes a connection base, and the moving contact is fixedly arranged on the connection base through a corresponding insulator.

[0008] Furthermore, the busbar segments form an isolation gap that cooperates with the moving contact, the central axes of the busbars on both sides of the isolation gap coincide with each other, and the busbar near the isolation gap serves as a static contact. The moving contact includes a conductive arm that is parallel to and corresponds to the isolation gap, and the length direction of the conductive arm is perpendicular to the direction of the linear reciprocating motion of the moving contact. As the moving contact moves back and forth in a linear manner, the busbar near the isolation gap can be separated from or contacted with the moving contact to achieve opening and closing.

[0009] Furthermore, conductive parts are respectively provided at both ends of the conductive arm, and the conductive parts can cooperate with the busbar near the isolation interval.

[0010] Furthermore, the conductive member includes at least one group of conductive contact fingers arranged in pairs, one end of the two conductive contact fingers in each group is fixedly connected to the conductive arm, and the other ends of the two conductive contact fingers are directed toward the busbar and bent to form arc-shaped guide surfaces that gradually separate from each other, so that a gap is formed between the two conductive contact fingers in each group that can clamp the busbar.

[0011] Furthermore, each arcuate guide surface is formed by a plurality of arcuate guide strips arranged side by side and at intervals.

[0012] Furthermore, it also includes a supporting structure, and the isolation mechanism, transmission mechanism and operating mechanism are arranged on the supporting structure. The transmission mechanism includes a transmission assembly and a screw rod. One end of the transmission assembly is linked to the driving connecting rod of the operating mechanism, and the other end of the transmission assembly is linked to the screw rod. The screw rod rotates and is threadedly connected to the supporting structure, and one end of the screw rod is connected to the isolation mechanism. When the driving connecting rod of the operating mechanism rotates, the screw rod drives the transmission assembly to make the isolation mechanism perform linear reciprocating motion.

[0013] Furthermore, the transmission assembly includes two sprockets and a transmission chain linked to the two sprockets, and the two sprockets are respectively connected to the driving connecting rod and the screw rod of the operating mechanism; or, the transmission assembly includes two gears and a transmission belt linked to the two gears, and the two gears are respectively connected to the driving connecting rod and the screw rod of the operating mechanism.

[0014] Furthermore, the transmission mechanism also includes a guide structure, which includes at least one guide column. The guide column is arranged on one side of the screw rod, one end of the guide column is fixedly connected to the isolation mechanism, and the other end of the guide column can slide through a second assembly hole provided on the support structure, and a balance spring is provided on the outside of the screw rod and the guide column.

[0015] Furthermore, the support structure includes a support member and a support column, and the support member and the support column are vertically fixed in a T shape. The operating mechanism and the support column are located on one side of the support member, and the isolation mechanism and the transmission mechanism are arranged on the other side of the support member; the connecting base of the isolation mechanism is arranged parallel to the support member, and the transmission mechanism includes a screw rod, which is connected to the support member and the connecting base. A first assembly hole threadedly connected to the screw rod is provided on the support structure. When the screw rod drives the support member to perform linear reciprocating motion, it can be rotated into the interior of the support column through the first assembly hole.

[0016] Different from the existing main circuit rotating opening and closing actions, the high-voltage disconnector of the present invention, under the action of the operating mechanism and the transmission mechanism, enables the moving contact to complete the opening and closing actions by performing linear reciprocating motion. The linear motion of the moving contact does not occupy the phase space, thereby avoiding the overall space occupation being too large. In addition, the coordination of the various mechanisms is simple, the assembly difficulty is low, and it is conducive to improving the installation quality.

[0017] In addition, each phase moving contact corresponds to an insulator, which reduces the number of insulators, helps reduce the overall volume and reduce costs; in addition, multi-phase moving contacts are arranged on the same connection base, making the overall structure simpler and ensuring the same action of the moving contacts of each phase.

[0018] In addition, the static contact cooperating with the moving contact is formed by the busbar, so the static contact can be omitted. Furthermore, a conductive part capable of clamping the busbar is provided on the moving contact, which can ensure the stability of opening and closing, making the overall mechanism more reliable.

[0019] In addition, the transmission assembly is composed of two gears and a transmission belt or two sprockets and a transmission chain, which reduces the wear of parts during the transmission process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a high-voltage disconnector of the present invention (closing);

[0021] Figure 2 It is a structural diagram of a high-voltage disconnector of the present invention (opening);

[0022] Figure 3 It is a structural schematic diagram of an isolation mechanism in a high-voltage disconnector of the present invention (closing);

[0023] Figure 4 It is a structural schematic diagram of an isolation mechanism in a high-voltage disconnector of the present invention (opening);

[0024] Figure 5 This is a structural diagram of a transmission mechanism in a high-voltage disconnector of the present invention;

[0025] Figure 6 It is a structural schematic diagram of a transmission assembly in a high-voltage disconnector of the present invention (closing);

[0026] Figure 7 This is a structural schematic diagram of a conductive arm and a conductive contact finger in a high-voltage disconnector of the present invention;

[0027] Figure 8 It is a structural schematic diagram (side view) of a conductive arm and a conductive contact finger in a high-voltage disconnector of the present invention. DETAILED DESCRIPTION

[0028] The following is combined with Figures 1 to 8 The following embodiments are provided to further illustrate the specific implementation of a high-voltage disconnector according to the present invention. The high-voltage disconnector according to the present invention is not limited to the description of the following embodiments.

[0029] A high-voltage disconnect switch includes a support structure 3 and an isolation mechanism 1, a transmission mechanism 2 and an operating mechanism 4 arranged on the support structure 3. The isolation mechanism 1 corresponds to at least one phase busbar 5, and the transmission mechanism 2 is linked to the isolation mechanism 1 and the operating mechanism 4 respectively. The isolation mechanism 1 includes a moving contact 11 corresponding to each phase busbar 5 respectively, and a static contact cooperating with the moving contact 11 is arranged on the busbar 5. The transmission mechanism 2 drives the moving contact 11 to perform linear reciprocating motion under the drive of the operating mechanism 4 to complete the opening and closing action.

[0030] Different from the existing main circuit rotating opening and closing actions, the high-voltage disconnector of the present invention, under the action of the operating mechanism 4 and the transmission mechanism 2, enables the moving contact 11 to complete the opening and closing actions by performing linear reciprocating motion. The linear motion of the moving contact 11 does not occupy the phase space, thereby avoiding the overall space occupation being too large. In addition, the coordination of the various mechanisms is simple, which is conducive to improving the installation quality.

[0031] Combine Figure 1-8 Provided is a preferred embodiment of a high-voltage disconnector, the high-voltage disconnector comprises a support structure 3 and an isolation mechanism 1, a transmission mechanism 2 and an operating mechanism 4 arranged on the support structure 3, such as Figure 1 、 2 As shown, the support structure 3 includes a support column 32 and a support member 31. The support column 32 and the support member 31 are fixed perpendicularly to each other in a T-shape. Of course, the support column 32 and the support member 31 can also be connected in a cross shape, or the support structure 3 can be another structure that can provide support. In this embodiment, the operating mechanism 4 and the support column 32 are located on one side of the support member 31, and the isolation mechanism 1 and the transmission mechanism 2 are located on the other side of the support member 31. The isolation mechanism 1 and the operating mechanism 4 are connected by the transmission mechanism 2. Under the drive of the operating mechanism 4, the transmission mechanism 2 can drive the isolation mechanism 1 and the movable contact 11 to perform linear reciprocating motion, which is shown in the figure as linear reciprocating motion along the axial direction of the support column 32.

[0032] like Figure 1-4 As shown, the isolation mechanism 1 is arranged corresponding to at least one phase bus 5, and the isolation mechanism 1 includes a connecting base 13 and at least one phase moving contact 11. The connecting base 13 is linked to the transmission mechanism 2, and at least one insulator 12 is arranged on the connecting base 13, preferably a silicone insulator, and a phase moving contact 11 is arranged on each insulator 12. Each phase moving contact 11 corresponds to a phase bus 5 respectively, and each phase bus 5 is arranged in sections to form an isolation interval 51. The moving contact 11 corresponds to the isolation interval 51 and cooperates with the static contact (not shown) arranged at the isolation interval 51. The moving contact 11 can separate from or contact with the static contact during the linear reciprocating motion, thereby completing the opening and closing action to realize the disconnection or connection of the control bus 5 circuit.

[0033] In this way, the transmission mechanism 2 can simultaneously drive the multi-phase moving contacts 11 to move by connecting to the base 13, thereby ensuring the uniformity of the movement of the multi-phase moving contacts 11; a phase moving contact 11 is fixedly arranged on each insulator 12, which reduces the number of insulators 12 used compared to the existing structure, and the insulator 12 does not rotate during the opening and closing operation, thereby solving the problem that the existing insulator 12 is affected by torque or bending moment.

[0034] In this embodiment, the isolation mechanism 1 corresponds to the three-phase bus 5 (see Figure 1 、 2 , respectively, the A-phase busbar 5a, the B-phase busbar 5b and the C-phase busbar 5c, each phase busbar 5 is provided with an isolation spacer 51). Therefore, three insulators 12 are provided on the connection base 13. Preferably, the three insulators 12 are arranged at equal intervals. The moving contact 11 provided on each insulator 12 includes a conductive arm 111 opposite to the isolation spacer 51 (see Figure 2 、 4 , 7 and 8), a conductive member for cooperating with the static contact is provided on the conductive arm 111. In this example, it is preferred not to set a static contact separately, and the busbar 5 near the isolation interval 51 forms a static contact cooperating with the moving contact 11 of each phase. The busbar 5 near the isolation interval 51 disconnects or connects the busbar 5 circuit by separation or contact with the conductive member. Such a structure can omit the static contact and the terminal, reduce the number of components, simplify the overall structure and installation process, and help reduce costs. Of course, static contacts can also be set on both sides of the isolation interval 51.

[0035] like Figure 2 、 4 , 7 and 8, the moving contact 11 includes a conductive arm 111 in a straight line shape and two groups of conductive members arranged on the conductive arm 111. The length direction of the conductive arm 111 is perpendicular to the direction of linear reciprocating motion of the moving contact 11. The conductive arm 111 is located as a whole below the busbar 5 and is parallel to the isolation space 51. The relative relationship between the conductive arm 111 and the connecting base 13 can be eccentric and perpendicular, or at a certain angle. The conductive arm 111 can be made of a square tube, and the two groups of conductive members are respectively arranged at both ends of the conductive arm 111. The conductive members include at least one group of conductive contact fingers 112 arranged in pairs, one end of the two conductive contact fingers 112 of each group is fixedly connected to the conductive arm 111, and the other end of the two conductive contact fingers 112 faces the busbar 5, so that a gap capable of clamping the busbar 5 is formed between the two conductive contact fingers 112 of each group, as shown in FIG. Figure 1 、 3 As shown, when the moving contact 11 moves upward along the axial direction of the support column 32, the busbar 5 near the isolation interval 51 extends into the gap between the paired conductive contact fingers 112 to form a cross-arm type circuit, as shown in FIG. Figure 2 、 4As shown, when the movable contact 11 moves downward along the axial direction of the support column 32, the busbar 5 near the isolation gap 51 is separated from the conductive contact finger 112. Of course, each group of conductive parts can also be provided with only one conductive contact finger 112, but a single conductive contact finger 112 is prone to poor matching.

[0036] Further, such as Figure 7 and 8 As shown, the two conductive contact fingers 112 are bent toward one end of the busbar 5 to form an arc-shaped guide surface 113 that gradually separates from each other, which is convenient for the busbar 5 to extend into and separate from. The arc-shaped guide surface 113 is made of arc-resistant alloy material, so that the conductive contact fingers 112 can effectively extinguish the arc when engaging with or separating from the busbar 5. Figure 7 As shown, each arcuate guide surface 113 is formed by multiple arcuate guide strips arranged side by side and spaced apart. The spacing of multiple arcuate guide strips increases contact points, thereby forming multiple loops and enhancing current carrying capacity. It should be noted that only one set of conductive members may be provided, provided that the isolation gap 51 is connected. The shape of the conductive member is not specifically limited.

[0037] like Figure 1 、 2 , 5 and 6, the transmission mechanism 2 is provided between the support member 31 and the connection base 13, and the transmission mechanism 2 includes a transmission assembly 22 (see Figure 6 ) and a screw rod 21. One end of the transmission assembly 22 is connected to the driving connecting rod 41 of the operating mechanism 4, and the other end of the transmission assembly 22 is linked to the screw rod 21. The screw rod 21 is arranged along the axial direction of the support column 32. The screw rod 21 is threadedly connected to the support structure 3, and one end of the screw rod 21 is connected to the isolation mechanism 1. When the driving connecting rod 41 of the operating mechanism 4 rotates, the screw rod 21 is driven by the transmission assembly 22 to make the isolation mechanism 1 perform linear reciprocating motion. Among them, a first assembly hole for threaded connection with the screw rod 21 is provided on the support structure 3. Preferably, the first assembly hole is correspondingly arranged at the end of the support column 32. One end of the screw rod 21 is fixedly connected to the isolation mechanism 1, and the other end cooperates with the first assembly hole. The rod body of the screw rod 21 is linked to the transmission assembly 22. In this way, the screw rod 21 can be rotated into the support column 32 during linear reciprocating motion, reducing the excessive external space occupied by the screw rod 21.

[0038] The transmission assembly 22 can be optionally a sprocket transmission system or a gear transmission system. The transmission assembly 22 links the screw rod 21 with the driving link 41 of the operating mechanism 4. In the prior art, it is directly driven by the driving link 41, so that the driving link 41 can only rotate within the range of 90 to 180 degrees, resulting in severe local wear of the driving link 41. In this embodiment, the transmission assembly 22 converts the rotation of the driving link 41 into multiple circles of circular rotation, thereby avoiding severe local wear of the driving link 41 and improving the service life of the product.

[0039] like Figure 6 As shown, when the transmission component 22 is a sprocket transmission system, the transmission component 22 includes a first sprocket 221, a second sprocket 222 and a transmission chain 223. The first sprocket 221 and the second sprocket 222 are rotatably set on the supporting structure 3. The transmission chain 223 is simultaneously sleeved on the first sprocket 221 and the second sprocket 222 to realize a linkage connection. The driving connecting rod 41 of the operating mechanism 4 is linked to the first sprocket 221, and the screw rod 21 is linked to the second sprocket 222.

[0040] When the transmission assembly 22 is a gear transmission system (not shown), the transmission assembly 22 includes a first gear, a second gear and a transmission belt. The first gear and the second gear are rotatably arranged on the support structure 3. The transmission belt is simultaneously sleeved on the first gear and the second gear to achieve linkage. The driving connecting rod 41 of the operating mechanism 4 is linked to the first gear, and the screw rod 21 is linked to the second gear.

[0041] Preferably, Figure 1 、 2 As shown in Figure 5, the transmission mechanism 2 also includes a guide structure, which cooperates with the support structure 3 to provide a guiding function for the isolation mechanism 1 when it performs linear reciprocating motion. Specifically, the guide structure includes at least one guide column 23. In the figure, a guide column 23 is provided on both sides of the screw rod 21. The guide column 23 is provided on one side of the screw rod 21. One end of the guide column 23 is fixedly connected to the connecting base 13. At least one second assembly hole for cooperating with the other end of the guide column 23 is provided on the support structure 3. Preferably, the second assembly hole is a through hole. Under the drive of the operating mechanism 4, the screw rod 21 cooperates with the first assembly hole to make the connecting base 13 and the support member 31 perform linear motion towards or away from each other, and the guide column 23 also slides with the second assembly hole to achieve a guiding effect.

[0042] Furthermore, a balancing spring 24 is provided on the outside of the screw rod 21 and the guide column 23. The driving connecting rod 41 of the operating mechanism 4 causes the screw rod 21 to perform linear reciprocating motion through the transmission assembly 22. When the isolation mechanism 1 and the support structure 3 gradually approach each other, the balancing spring 24 is compressed. When the isolation mechanism 1 and the support structure 3 gradually move away from each other, the balancing spring 24 releases the elastic force to balance the gravity of the isolation mechanism 1.

[0043] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A high-voltage disconnector, comprising an isolation mechanism (1), a transmission mechanism (2), a support structure (3) and an operating mechanism (4), wherein the isolation mechanism (1), the transmission mechanism (2) and the operating mechanism (4) are arranged on the support structure (3), the isolation mechanism (1) corresponds to at least one phase busbar (5), and the transmission mechanism (2) is linked to the isolation mechanism (1) and the operating mechanism (4), respectively, and characterized in that: The isolation mechanism (1) comprises a movable contact (11) corresponding to each phase busbar (5), a stationary contact matched with the movable contact (11) being arranged on the busbar (5), and a transmission mechanism (2) drives the movable contact (11) to perform linear reciprocating motion under the drive of the operating mechanism (4) to complete the opening and closing action; The busbar (5) is segmented to form an isolation interval (51) that cooperates with the moving contact (11), the central axes of the busbars (5) on both sides of the isolation interval (51) coincide with each other, and the busbar (5) near the isolation interval (51) serves as a static contact. The isolation mechanism (1) also includes a connecting base (13) and at least one insulator (12), and a corresponding phase moving contact (11) is provided on each insulator (12). The moving contact (11) is fixedly provided on the connecting base (13) through the corresponding insulator (12), and the moving contact (11) includes a conductive arm (111) corresponding to the isolation interval (51), and the length direction of the conductive arm (111) is perpendicular to the direction of linear reciprocating motion of the moving contact (11); The support structure (3) includes a support member (31) and a support column (32), the support member (31) and the support column (32) are vertically fixed, the operating mechanism (4) and the support column (32) are located on one side of the support member (31), and the isolation mechanism (1) and the transmission mechanism (2) are arranged on the other side of the support member (31). The transmission mechanism (2) includes a screw rod (21), and a first assembly hole threadedly connected to the screw rod (21) is correspondingly provided at the end of the support column (32). One end of the screw rod (21) is fixedly connected to the isolation mechanism (1), and the other end is matched with the first assembly hole. When the screw rod (21) drives the movable contact (11) of the isolation mechanism (1) to perform linear reciprocating motion, it can be rotated into the interior of the support column (32) through the first assembly hole.

2. A high-voltage disconnect switch according to claim 1, characterized in that: Conductive members are respectively provided at both end portions of the conductive arm (111), and the conductive members can cooperate with the busbar (5) near the isolation interval (51).

3. A high-voltage disconnect switch according to claim 2, characterized in that: The conductive member comprises at least one group of conductive contact fingers (112) arranged in pairs, one end of each group of two conductive contact fingers (112) being fixedly connected to a conductive arm (111), and the other end of each group of two conductive contact fingers (112) being bent toward the busbar (5) to form mutually separated arc-shaped guide surfaces (113), so that a gap capable of clamping the busbar (5) is formed between the two conductive contact fingers (112) in each group.

4. A high-voltage disconnect switch according to claim 3, characterized in that: Each arc-shaped guide surface (113) is formed by a plurality of arc-shaped guide strips arranged side by side and at intervals.

5. The high-voltage disconnect switch according to claim 1, characterized in that: The transmission mechanism (2) comprises a transmission assembly (22), one end of which is linked to a driving connecting rod (41) of the operating mechanism (4), and the other end of which is linked to a screw rod (21).

6. A high-voltage disconnect switch according to claim 5, characterized in that: The transmission assembly (22) includes two sprockets and a transmission chain (223) linked to the two sprockets, and the two sprockets are respectively connected to the driving connecting rod (41) and the screw rod (21) of the operating mechanism (4); or, the transmission assembly (22) includes two gears and a transmission belt linked to the two gears, and the two gears are respectively connected to the driving connecting rod (41) and the screw rod (21) of the operating mechanism (4); the transmission mechanism (2) also includes a guide structure, and the guide structure includes at least one guide column (23), the guide column (23) is arranged on one side of the screw rod (21), one end of the guide column (23) is fixedly connected to the isolation mechanism (1), and the other end of the guide column (23) can slide through a second assembly hole provided on the support structure (3), and a balance spring (24) is sleeved on the outer side of the screw rod (21) and the guide column (23).

7. The high-voltage disconnect switch according to claim 1, characterized in that: The connecting base (13) of the isolation mechanism (1) is arranged in parallel with the supporting member (31) and spaced apart from each other.

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