High-voltage load isolation switch

Abstract

The invention relates to the technical field of isolating switches, and discloses a high-voltage load isolating switch which comprises two side-mounted conductive mechanisms and an elastic contact conductive mechanism. According to the high-voltage load isolation switch, a circuit is opened and closed in a longitudinal displacement mode, the middle conductive block and the two side conductive blocks are in full contact through the elasticity of the spiral spring, and therefore the phenomenon of poor contact caused by contact gaps is prevented, and meanwhile when current is switched on, the high-voltage load isolation switch is not damaged. And the impact force of the middle conductive block on the two side conductive blocks can be reduced by utilizing the limitation of the porous structure on gas flow, so that the effective service life of the device is effectively prolonged.

Description

Technical Field

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

[0002] High-voltage load isolating switch is a commonly used switch, mainly used to disconnect high-voltage circuits with no-load current. It mainly includes a base, a support insulator and an isolating blade. A mounting seat is provided at the bottom of the support insulator, and a mounting hole is provided on the mounting seat. After the bolt passes through the mounting hole, it is fixed with a nut to be fixed on the base.

[0003] For example, the Chinese patent with the publication number "CN213877924U" discloses "a high-voltage load isolating switch", in which the post insulator is not only fixed by the combination of bolts and nuts during assembly, but also can be fixed by the block that slides out of the slide slot, which can improve the assembly firmness of the post insulator and the base, and improve the working stability of the overall isolating switch. The structure of adding a protective cover can protect the connection between the post insulator and the base, and prevent the bolts from being damaged by external interference, erosion, etc., which affects its quality of use.

[0004] In actual use, the isolation cutter head realizes the closing and opening of the circuit in the form of rotation. During the rotation process, the isolation cutter head and the mounting plate must be in contact to realize the closing of the circuit. Since the isolation cutter head is in contact with the mounting plate in the form of rotation, after a period of use, wear will appear between the isolation cutter head and the mounting plate, resulting in insufficient contact pressure between the two, which will cause poor contact. At the same time, longitudinal displacement cannot occur between the isolation cutter head and the mounting plate, resulting in poor contact caused by the inability to compensate for the friction loss between the two. Therefore, the effective service life is low. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a high-voltage load isolating switch, which uses longitudinal displacement to open and close the circuit, and utilizes the elasticity of the coil spring to ensure full contact between the middle conductive block and the two side conductive blocks, thereby preventing the occurrence of poor contact due to contact gaps. At the same time, when the current is turned on, the restrictive nature of the porous structure on the gas flow can be utilized to reduce the impact force of the middle conductive block on the two side conductive blocks, thereby effectively improving the effective service life of the device and solving the above-mentioned technical problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-voltage load isolating switch, comprising a middle mounting seat with main mounting holes on both sides, a secondary mounting hole arranged in the center of the middle mounting seat and two No. 1 component through-holes arranged on both sides symmetrically of the secondary mounting hole, and also comprising two side-mounted conductive mechanisms, inside which are arranged a No. 1 insulating core that can be fixedly mounted above the middle mounting seat and a side conductive block installed above the No. 1 insulating core and connected to one end of the circuit; and an elastic contact conductive mechanism, inside which are arranged a No. 2 insulating core that is fixedly mounted in the secondary mounting hole and has a hollow structure inside, a middle conductive block located directly above the No. 2 insulating core and capable of contacting the two side conductive blocks, a No. 1 coil spring that exerts upward elastic pressure on the middle conductive block, and a wing-shaped movable plate that moves longitudinally with the middle conductive block and can contact the bottom of the No. 2 insulating core to prevent the middle conductive block from moving upward.

[0007] Preferably, the side-mounted conductive mechanism includes an insulating core No. 1, the bottom of which is provided with a fixing plate No. 1 which is an integral structure with the insulating core No. 1 and fixedly mounted on the upper surface of the middle mounting seat, the outer surface of the insulating core No. 1 is provided with a ceramic gourd No. 1, the top of which is fixedly mounted with an insulating fixing rod which passes through the ceramic gourd No. 1, the interior of the insulating core No. 1 is provided with an internal threaded hole with an open bottom, and the insulating core No. 1 is provided with an internal threaded structure on the circumferential inner wall of the internal threaded hole, the bottom end of the internal threaded hole is connected with the top end of the through-hole of the No. 1 component, the top of the insulating fixing rod is fixedly mounted with a side conductive block, the side conductive block is provided with a snap-in groove at one end close to the auxiliary mounting hole, and the other end of the side conductive block is provided with a terminal connected to one end of the transmission line.

[0008] Preferably, the No. 1 insulating core and the insulating fixing rod are both made of insulating materials.

[0009] Preferably, the elastic contact-type conductive mechanism includes a No. 2 insulating core, the circumferential surface of the middle area of ​​the No. 2 insulating core is provided with an annular mounting groove fixedly installed in the auxiliary mounting hole, the circumferential surface of the No. 2 insulating core is installed with a No. 2 ceramic gourd, the interior of the No. 2 insulating core is provided with a No. 1 component active cavity near its top, the top of the No. 2 insulating core is provided with a No. 2 component through hole connecting the space above it and the top of the No. 1 component active cavity, the No. 2 insulating core is provided with a gas limiting flow cavity directly below the No. 1 component active cavity, and the gas limiting A component No. 2 active cavity is arranged at the bottom end of the gas flow cavity, a wing-shaped limiting through hole connecting the space below and the bottom end of the component No. 2 active cavity is arranged inside the No. 2 insulating core, a No. 1 vent hole connecting the outside space and one side of the gas limit flow cavity is arranged on the circumferential surface of the No. 2 insulating core, a No. 2 vent hole connecting the outside space and the other side of the gas limit flow cavity is arranged on the circumferential surface of the No. 2 insulating core, a gas valve check valve is installed inside the No. 2 vent hole of the No. 2 insulating core for allowing gas to enter the gas limit flow cavity from the outside space in one direction.

[0010] Preferably, the No. 1 movable plate capable of axially moving along the movable cavity of the No. 1 component is placed inside the movable cavity of the No. 1 component in the No. 2 insulating core, and the No. 5 longitudinal movable rod penetrating the through hole of the No. 2 component is fixedly installed on the upper surface of the No. 1 movable plate, and the middle conductive blocks capable of abutting against the inside of the card-in slot at both ends are fixedly installed on the top of the No. 5 longitudinal movable rod, and the No. 1 longitudinal movable rod penetrating the insulation structure of the No. 2 insulating core and the gas limiting flow cavity is fixedly installed on the lower surface of the No. 1 movable plate, and a sealing ring capable of preventing gas leakage is embedded in the part of the No. 2 insulating core penetrated by the No. 1 longitudinal movable rod, and the No. 1 longitudinal movable rod is located inside the movable cavity of the No. 1 component. A No. 1 coil spring in a compressed state is placed on the outer periphery of the body, and a gap for gas flow is provided between the inner circumference of the gas limiting flow cavity and the outer circumference of the No. 1 longitudinal movable rod, and a piston plate which can move axially along the movable cavity of the No. 2 component is fixedly installed at the bottom end of the No. 1 longitudinal movable rod located inside the movable cavity of the No. 2 component, and a No. 2 longitudinal movable rod which can rotate is installed at the bottom end of the piston plate through a bearing, and a wing-shaped movable plate which can move axially along the wing-shaped limiting through hole is fixedly installed at the bottom end of the No. 2 longitudinal movable rod, and a No. 3 longitudinal movable rod is fixedly installed at the bottom end of the wing-shaped movable plate, and a No. 1 force application plate is fixedly installed at the bottom end of the No. 3 longitudinal movable rod.

[0011] Preferably, the structural shape of the perforated cross section of the No. 2 component is consistent with the structural shape of the cross section of the No. 5 longitudinal movable rod, both are polygonal structures, and the structural dimensions of the perforated cross section of the No. 2 component match the structural dimensions of the cross section of the No. 5 longitudinal movable rod.

[0012] Preferably, the structural shape of the cross section of the wing-shaped limiting through hole is consistent with the structural shape of the cross section of the wing-shaped movable plate, and the structural dimension of the cross section of the wing-shaped limiting through hole matches the structural dimension of the cross section of the wing-shaped movable plate.

[0013] Preferably, it also includes a threaded pre-tightening fastening mechanism, which is internally provided with a longitudinal hollow shell with an internal hollow structure that abuts against the bottom of the middle mounting seat, a longitudinal threaded rod installed in the internal threaded hole in the form of a threaded structure, and a No. 2 coil spring that enables the longitudinal threaded rod to generate a downward elastic pre-tightening force.

[0014] Preferably, the threaded pre-tightening fastening mechanism includes a longitudinal hollow shell, the upper end surface of the longitudinal hollow shell is provided with a No. 2 fixing plate which is an integral structure therewith and abuts against the bottom of the middle mounting seat, the interior of the longitudinal hollow shell is provided with a No. 3 component movable cavity, the top of the longitudinal hollow shell is provided with a No. 3 component through-hole connecting the bottom end of the No. 1 component through-hole and the top end of the No. 3 component movable cavity, the bottom end of the longitudinal hollow shell is provided with a No. 4 component through-hole connecting the space below it and the bottom end of the No. 3 component movable cavity, and the longitudinal hollow shell is provided with a No. 3 component through-hole inside the No. 3 component movable cavity. A No. 2 movable plate is axially movable in the movable cavity of the component, and a component mounting hole is arranged at the center of the No. 2 movable plate, and a No. 4 longitudinal movable rod capable of rotation is mounted on the No. 2 movable plate through a bearing in the component mounting hole, and a No. 2 force plate is fixedly mounted on the bottom end of the No. 4 longitudinal movable rod, and a longitudinal threaded rod which passes through the through hole of the No. 3 component and the through hole of the No. 1 component is fixedly mounted on the top end of the No. 4 longitudinal movable rod, and an external thread structure matching the internal thread structure is arranged on the rod body of the longitudinal threaded rod, and a No. 2 coil spring which exerts downward elastic pressure on the No. 2 movable plate is arranged in the movable cavity of the No. 3 component.

[0015] Preferably, the structural shape of the cross section of the movable cavity of the third component is consistent with the structural shape of the cross section of the No. 2 movable plate, both are polygonal structures, and the structural dimensions of the cross section of the movable cavity of the third component match the structural dimensions of the cross section of the No. 2 movable plate.

[0016] Compared with the prior art, the present invention provides a high-voltage load isolating switch, which has the following beneficial effects:

[0017] 1. The circuit is opened and closed by longitudinal displacement, and the elasticity of the coil spring is used to ensure full contact between the middle conductive block and the two side conductive blocks, thereby preventing poor contact caused by contact gap. At the same time, when the current is turned on, the restrictive effect of the porous structure on the gas flow can reduce the impact force of the middle conductive block on the two side conductive blocks, thereby effectively improving the effective service life of the device.

[0018] 2. By setting up an elastic contact-type conductive mechanism, when the circuit needs to be disconnected, the wing-shaped movable plate is made to contact the bottom end of the No. 2 insulating core. At this time, the middle conductive block cannot move downward, and the power-off operation can be completed. When the circuit needs to be closed, the wing-shaped movable plate is aligned with the wing-shaped limit through hole. Under the elastic action of the No. 1 coil spring, the piston plate moves upward, which will cause the internal gas to be discharged only through the No. 1 vent hole. The No. 1 vent hole is restrictive to the flowing gas, thereby delaying the upward movement speed of the middle conductive block and reducing the strength of the middle conductive block hitting the two side conductive blocks during the impact contact. At the same time, the contact between the middle conductive block and the side conductive block realizes the closure of the circuit.

[0019] 3. By setting up a threaded pre-tightening fastening mechanism, under the influence of the threaded structure, the longitudinal threaded rod will drive the No. 2 movable plate to move upward and continue to compress the No. 2 coil spring, and the reaction force of the No. 2 coil spring will cause the longitudinal threaded rod to move downward, thereby realizing a pre-tightening fixing relationship, preventing the occurrence of loosening caused by mechanical vibration, and improving the working stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A stereogram of the present invention in the main viewing angle;

[0021] Figure 2 It is a three-dimensional cross-sectional view of the present invention at the main viewing angle;

[0022] Figure 3 It is a three-dimensional cross-sectional view of the present invention from the right side viewing angle;

[0023] Figure 4 It is a three-dimensional cross-sectional view of the side-mounted conductive mechanism of the present invention;

[0024] Figure 5 It is a three-dimensional cross-sectional view of the elastic contact-type conductive mechanism in the present invention at the main viewing angle;

[0025] Figure 6 It is a three-dimensional cross-sectional view of the elastic contact-type conductive mechanism in the present invention from the right side viewing angle;

[0026] Figure 7 It is a three-dimensional cross-sectional view of the elastic contact-type conductive mechanism in the wing-shaped movable plate area of ​​the present invention;

[0027] Figure 8 It is a three-dimensional cross-sectional view of the thread pre-tightening fastening mechanism of the present invention.

[0028] Among them: 1. Middle mounting seat; 2. Main mounting hole; 3. No. 1 component through hole; 4. Auxiliary mounting hole; 5. Side mounted conductive mechanism; 51. No. 1 insulating core; 52. No. 1 ceramic hoist; 53. No. 1 fixing plate; 54. Insulating fixing rod; 55. Side conductive block; 56. Terminal; 57. Insertion groove; 58. Internal thread hole; 6. Elastic contact conductive mechanism; 61. No. 2 insulating core; 62. Annular mounting groove; 63. No. 2 ceramic hoist; 64. No. 1 component movable cavity; 65. No. 2 component through hole; 66. Gas limit flow cavity; 67. No. 2 component movable cavity; 68. Wing-shaped limit through hole; 69. No. 1 movable plate; 610. No. 1 spiral spring; 611. No. 1 longitudinal movable Rod; 612, sealing ring; 613, piston plate; 614, No. 2 longitudinal movable rod; 615, wing-shaped movable plate; 616, No. 3 longitudinal movable rod; 617, No. 1 force plate; 618, middle conductive block; 619, No. 1 vent hole; 620, No. 2 vent hole; 621, gas valve check valve; 622, No. 5 longitudinal movable rod; 7, threaded pre-tightening fastening mechanism; 71, longitudinal hollow shell; 72, No. 2 fixing plate; 73, No. 3 component movable cavity; 74, No. 3 component perforation; 75, No. 4 component perforation; 76, No. 2 movable plate; 77, component mounting hole; 78, No. 4 longitudinal movable rod; 79, No. 2 force plate; 710, No. 2 coil spring; 711, longitudinal threaded rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1 , Figure 2 and Figure 3 A high-voltage load isolating switch comprises a middle mounting seat 1 with main mounting holes 2 on both sides, a secondary mounting hole 4 arranged at the center of the middle mounting seat 1, and two No. 1 component through holes 3 arranged on both sides symmetrically of the secondary mounting hole 4. The main mounting hole 2 of the middle mounting seat 1 is fixed to the working position by bolts.

[0031] To achieve connection with the delivery end of the wire, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4, it is necessary to set up two side-mounted conductive mechanisms 5, which are provided with a No. 1 insulating core 51 that can be fixedly installed above the middle mounting seat 1 and a side conductive block 55 installed above the No. 1 insulating core 51 and docked with one end of the circuit. The two terminal posts 56 are docked with the transmission ends of the wires respectively. At this time, the current will be transmitted to the two side conductive blocks 55, thereby achieving docking with the transmission ends of the wires.

[0032] For the specific structure of the side mounted conductive mechanism 5, please refer to Figure 4 , including an insulating core No. 1 51, the bottom of the insulating core No. 1 51 is provided with a fixing plate No. 1 53 which is an integral structure with the insulating core No. 1 and is fixedly mounted on the upper surface of the middle mounting seat 1, the outer surface of the insulating core No. 1 51 is provided with a ceramic gourd No. 1 52, the top of the insulating core No. 1 51 is fixedly mounted with an insulating fixing rod 54 which passes through the ceramic gourd No. 1 52, the insulating core No. 1 51 and the insulating fixing rod 54 are both made of insulating materials, the interior of the insulating core No. 1 51 is provided with an internal threaded hole 58 with an open bottom, and the insulating core No. 1 51 is provided with an internal threaded structure on the circumferential inner wall of the internal threaded hole 58, the bottom end of the internal threaded hole 58 is connected with the top end of the through hole 3 of the No. 1 component, the top of the insulating fixing rod 54 is fixedly mounted with a side conductive block 55, the side conductive block 55 is provided with a snap-in groove 57 at one end close to the auxiliary mounting hole 4, and the other end of the side conductive block 55 is provided with a terminal 56 connected to one end of the transmission line.

[0033] To achieve elastic contact docking, see Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7, it is necessary to set up an elastic contact-type conductive mechanism 6, which is provided with a second insulating core 61 fixedly installed in the auxiliary mounting hole 4 and having a hollow structure inside, a middle conductive block 618 located just above the second insulating core 61 and capable of contacting the two side conductive blocks 55, a first coil spring 610 exerting an upward elastic pressure on the middle conductive block 618, and a wing-shaped movable plate 615 that moves longitudinally with the middle conductive block 618 and can contact the bottom of the second insulating core 61, thereby preventing the middle conductive block 618 from moving upward. When the circuit needs to be disconnected, the first force plate 617 is pulled downward. At this time, under the transmission of force, the middle conductive block 618 will move downward and disengage from the two side conductive blocks 55, thereby achieving power off. When the wing-shaped movable plate 615 moves to the bottom of the second insulating core 61, the first force plate 617 is rotated again, so that a misalignment relationship occurs between the wing-shaped movable plate 615 and the wing-shaped limiting through hole 68, and then the force plate 617 on the first force plate is released. The pulling force of plate 617 makes the wing-shaped movable plate 615 contact the bottom end of the second insulating core 61. At this time, the middle conductive block 618 cannot move downward, and the power-off operation can be completed. When the circuit needs to be closed, the first force-applying plate 617 is rotated to make the wing-shaped movable plate 615 align with the wing-shaped limit through hole 68, and then the first force-applying plate 617 is released. Under the elastic action of the first coil spring 610, the wing-shaped movable plate 615, the piston plate 613, the first movable plate 69 and The middle conductive block 618 moves upward. At this time, when the piston plate 613 moves, the internal gas can only be discharged outward through the No. 1 vent hole 619. The No. 1 vent hole 619 has a restrictive effect on the flowing gas, thereby delaying the upward movement speed of the middle conductive block 618 and reducing the strength of the impact contact when the middle conductive block 618 hits the two side conductive blocks 55. At the same time, the contact between the middle conductive block 618 and the side conductive blocks 55 realizes the closure of the circuit.

[0034] For the specific structure of the elastic contact type conductive mechanism 6, please refer to Figure 5 , Figure 6 and Figure 7, including a No. 2 insulating core 61, the circumferential surface of the middle area of ​​the No. 2 insulating core 61 is provided with an annular mounting groove 62 fixedly installed in the auxiliary mounting hole 4, the circumferential surface of the No. 2 insulating core 61 is installed with a No. 2 ceramic gourd 63, the interior of the No. 2 insulating core 61 is provided with a No. 1 component active cavity 64 near its top, the top of the No. 2 insulating core 61 is provided with a No. 2 component through hole 65 connecting the space above it and the top of the No. 1 component active cavity 64, the No. 2 insulating core 61 is provided with a gas limiting flow cavity 66 directly below the No. 1 component active cavity 64, the bottom end of the gas limiting flow cavity 66 is provided with a No. 2 component active cavity 67, the interior of the No. 2 insulating core 61 is provided with a connecting space below it and the No. 2 component active cavity 67 The wing-shaped limiting through hole 68 at the bottom, the circumferential surface of the No. 2 insulating core 61 is provided with a No. 1 vent hole 619 connecting the external space and one side of the gas limiting flow chamber 66, the circumferential surface of the No. 2 insulating core 61 is provided with a No. 2 vent hole 620 connecting the external space and the other side of the gas limiting flow chamber 66, the No. 2 insulating core 61 is installed with a gas valve check valve 621 inside the No. 2 vent hole 620, which enables the gas to enter the gas limiting flow chamber 66 from the external space in one direction, the No. 2 insulating core 61 is provided with a No. 1 movable plate 69 which can move axially along the No. 1 movable chamber 64 of the No. 1 component, and the upper surface of the No. 1 movable plate 69 is fixedly installed with a No. 5 longitudinal through hole 65 of the No. 2 component. Toward the movable rod 622, in order to prevent the self-rotation between the components, it is necessary to make the structural shape of the cross section of the through hole 65 of the No. 2 component consistent with the structural shape of the cross section of the No. 5 longitudinal movable rod 622, both of which are polygonal structures, and the structural dimensions of the cross section of the through hole 65 of the No. 2 component match the structural dimensions of the cross section of the No. 5 longitudinal movable rod 622. The top of the No. 5 longitudinal movable rod 622 is fixedly installed with a middle conductive block 618 whose two ends can abut against the inside of the card-in slot 57. The lower surface of the No. 1 movable plate 69 is fixedly installed with a No. 1 longitudinal movable rod 611 that penetrates the interlayer structure of the No. 2 insulating core 61 and the gas limiting flow cavity 66. The No. 2 insulating core 61 is embedded with a conductive block that can prevent A sealing ring 612 for preventing gas leakage, a No. 1 coil spring 610 in a compressed state is placed on the outer periphery of the rod body of the No. 1 component movable chamber 64 of the No. 1 longitudinal movable rod 611, and a gap for gas flow exists between the inner circumference of the gas limiting flow chamber 66 and the outer circumference of the No. 1 longitudinal movable rod 611, a piston plate 613 capable of axial movement along the No. 2 component movable chamber 67 is fixedly installed at the bottom end of the No. 1 longitudinal movable rod 611 located inside the No. 2 component movable chamber 67, a No. 2 longitudinal movable rod 614 capable of rotation is installed at the bottom end of the piston plate 613 through a bearing, and a wing-shaped movable plate 615 capable of axial movement along the wing-shaped limiting through hole 68 is fixedly installed at the bottom end of the No. 2 longitudinal movable rod 614,In order to realize the limited motion relationship, it is necessary to make the structural shape of the cross section of the wing-shaped limit through hole 68 consistent with the structural shape of the cross section of the wing-shaped movable plate 615, and the structural size of the cross section of the wing-shaped limit through hole 68 matches the structural size of the cross section of the wing-shaped movable plate 615. The bottom end of the wing-shaped movable plate 615 is fixedly installed with a third longitudinal movable rod 616, and the bottom end of the third longitudinal movable rod 616 is fixedly installed with a first force plate 617.

[0035] To achieve a preloaded fixed relationship, see Figure 1 , Figure 2 , Figure 3 and Figure 8 , it is necessary to set up a threaded pre-tightening fastening mechanism 7, which is provided with a longitudinal hollow shell 71 with an internal hollow structure that abuts against the bottom of the middle mounting seat 1, a longitudinal threaded rod 711 installed in the internal threaded hole 58 in the form of a threaded structure, and a No. 2 coil spring 710 that enables the longitudinal threaded rod 711 to generate a downward elastic pre-tightening force. The longitudinal threaded rod 711 is inserted into the internal threaded hole 58, and then the No. 2 force plate 79 is rotated. Under the influence of the threaded structure, the longitudinal threaded rod 711 will drive the No. 2 movable plate 76 to move upward and continue to compress the No. 2 coil spring 710, and the reaction force of the No. 2 coil spring 710 will cause the longitudinal threaded rod 711 to have a downward movement trend, thereby realizing a pre-tightening fixing relationship, preventing the occurrence of loosening caused by mechanical vibration, and improving the working stability of the equipment.

[0036] For the specific structure of the threaded pre-tightening fastening mechanism 7, please refer to Figure 8, including a longitudinal hollow shell 71, the upper end surface of the longitudinal hollow shell 71 is provided with a No. 2 fixing plate 72 which is an integral structure with it and abuts against the bottom of the middle mounting seat 1, the interior of the longitudinal hollow shell 71 is provided with a No. 3 component movable cavity 73, the top of the longitudinal hollow shell 71 is provided with a No. 3 component through-hole 74 which connects the bottom end of the No. 1 component through-hole 3 and the top end of the No. 3 component movable cavity 73, the bottom end of the longitudinal hollow shell 71 is provided with a No. 4 component through-hole 75 which connects the space below it and the bottom end of the No. 3 component movable cavity 73, the longitudinal hollow shell 71 is provided with a No. 2 movable plate 76 which can move axially along the No. 3 component movable cavity 73, in order to prevent the components from rotating, it is necessary to make the structural shape of the cross section of the No. 3 component movable cavity 73 consistent with the No. 2 movable plate 76. 6 The structural appearance of the cross-sections is consistent and both are polygonal structures, and the structural dimensions of the cross-section of the movable cavity 73 of the third component match the structural dimensions of the cross-section of the movable plate 76 of the second component. A component mounting hole 77 is provided at the center of the movable plate 76 of the second component. A rotatable longitudinal movable rod 78 of the fourth component is installed in the component mounting hole 77 through a bearing on the movable plate 76 of the second component. A force plate 79 is fixedly installed at the bottom end of the longitudinal movable rod 78 of the fourth component. A longitudinal threaded rod 711 that passes through the through hole 74 of the third component and the through hole 3 of the first component is fixedly installed at the top end of the longitudinal movable rod 78 of the fourth component, and an external threaded structure that matches the internal threaded structure is provided on the rod body of the longitudinal threaded rod 711. A No. 2 coil spring 710 that exerts downward elastic pressure on the movable plate 76 of the third component is placed in the movable cavity 73 of the third component.

[0037] When the present invention is used, the main mounting hole 2 of the middle mounting seat 1 is fixed to the working position by bolts, and then the two terminal posts 56 are connected to the transmission ends of the wires respectively. At this time, the current will be transmitted to the two side conductive blocks 55;

[0038] When it is necessary to disconnect the circuit, pull down the No. 1 force plate 617. At this time, the middle conductive block 618 will move downward under the transmission of force and disengage from the two side conductive blocks 55, thereby achieving power off. When the wing-shaped movable plate 615 moves to the bottom of the No. 2 insulating core 61, rotate the No. 1 force plate 617 again to cause a misalignment between the wing-shaped movable plate 615 and the wing-shaped limiting through hole 68, and then release the pulling force on the No. 1 force plate 617 to cause the wing-shaped movable plate 615 to contact the bottom end of the No. 2 insulating core 61. At this time, the middle conductive block 618 cannot move downward, and the power off operation can be completed. When it is necessary to close the circuit, rotate the No. 1 force plate 617 to cause the wing-shaped movable plate 615 to contact the bottom end of the No. 2 insulating core 61. 615 is aligned with the wing-shaped limit through hole 68, and then the No. 1 force plate 617 is released. Under the elastic action of the No. 1 coil spring 610, the wing-shaped movable plate 615, the piston plate 613, the No. 1 movable plate 69 and the middle conductive block 618 will move upward. At this time, when the piston plate 613 moves, the internal gas can only be discharged to the outside through the No. 1 vent hole 619, and the No. 1 vent hole 619 has a restrictive effect on the flowing gas, thereby delaying the upward movement speed of the middle conductive block 618 and reducing the strength of the impact contact when the middle conductive block 618 hits the two side conductive blocks 55. At the same time, the contact between the middle conductive block 618 and the side conductive blocks 55 realizes the closure of the circuit.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-voltage load isolating switch, comprising a middle mounting seat (1) with main mounting holes (2) on both sides, a secondary mounting hole (4) arranged at the center of the middle mounting seat (1), and two No. 1 component through holes (3) arranged on both sides symmetrically of the secondary mounting hole (4), characterized in that: Also includes, Two side-mounted conductive mechanisms (5), each of which is provided with a first insulating core (51) that can be fixedly mounted above the middle mounting seat (1) and a side conductive block (55) that is mounted above the first insulating core (51) and butt-jointed with one end of the circuit; and an elastically abutting conductive mechanism (6), which is provided with a second insulating core (61) fixedly mounted in the auxiliary mounting hole (4) and having a hollow structure inside, a middle conductive block (618) located directly above the second insulating core (61) and capable of contacting the two side conductive blocks (55), a first coil spring (610) exerting an upward elastic pressure on the middle conductive block (618), and a wing-shaped movable plate (615) that moves longitudinally with the middle conductive block (618) and can abut against the bottom of the second insulating core (61), thereby preventing the middle conductive block (618) from moving upward.

2. A high voltage load isolating switch according to claim 1, characterized in that: The side-mounted conductive mechanism (5) comprises a No. 1 insulating core (51), the bottom of the No. 1 insulating core (51) is provided with a No. 1 fixing plate (53) which is integrally structured with the No. 1 insulating core (51) and fixedly mounted on the upper surface of the middle mounting seat (1), the outer surface of the No. 1 insulating core (51) is provided with a No. 1 ceramic gourd (52), the top of the No. 1 insulating core (51) is fixedly provided with an insulating fixing rod (54) which passes through the No. 1 ceramic gourd (52), and the interior of the No. 1 insulating core (51) is provided with an internal threaded hole with an open bottom end. (58), and the No. 1 insulating core (51) is provided with an internal thread structure on the circumferential inner wall of the internal thread hole (58), the bottom end of the internal thread hole (58) is connected to the top end of the No. 1 component through hole (3), and the top end of the insulating fixing rod (54) is fixedly installed with a side conductive block (55), and the side conductive block (55) is provided with a snap-in groove (57) at one end close to the auxiliary mounting hole (4), and the other end of the side conductive block (55) is provided with a terminal (56) connected to one end of the transmission line.

3. A high voltage load isolating switch according to claim 2, characterized in that: The first insulating core (51) and the insulating fixing rod (54) are both made of insulating materials.

4. A high voltage load isolating switch according to claim 2, characterized in that: The elastic contact-type conductive mechanism (6) comprises a No. 2 insulating core (61), the circumferential surface of the middle region of the No. 2 insulating core (61) is provided with an annular mounting groove (62) fixedly mounted in the auxiliary mounting hole (4), the circumferential surface of the No. 2 insulating core (61) is provided with a No. 2 ceramic gourd (63), the interior of the No. 2 insulating core (61) is provided with a No. 1 component active cavity (64) near the top thereof, the top of the No. 2 insulating core (61) is provided with a No. 2 component through hole (65) connecting the space above it and the top of the No. 1 component active cavity (64), the No. 2 insulating core (61) is provided with a gas limiting flow cavity (66) directly below the No. 1 component active cavity (64), the gas limiting flow cavity (66) A second component active cavity (67) is provided at the bottom end of the No. 2 insulating core (61), a wing-shaped limiting through hole (68) connecting the space below and the bottom end of the No. 2 component active cavity (67) is provided inside the No. 2 insulating core (61), a No. 1 vent hole (619) connecting the external space and one side of the gas limiting flow cavity (66) is provided on the circumferential surface of the No. 2 insulating core (61), a No. 2 vent hole (620) connecting the external space and the other side of the gas limiting flow cavity (66) is provided on the circumferential surface of the No. 2 insulating core (61), and a gas valve check valve (621) is installed inside the No. 2 vent hole (620) of the No. 2 insulating core (61) to enable gas to enter the gas limiting flow cavity (66) from the external space in one direction.

5. A high voltage load isolating switch according to claim 4, characterized in that: The second insulating core (61) is provided with a first movable plate (69) which can move axially along the first movable chamber (64) of the first component, and the upper surface of the first movable plate (69) is fixedly installed with a fifth longitudinal movable rod (622) which passes through the through hole (65) of the second component, and the top of the fifth longitudinal movable rod (622) is fixedly installed with a middle conductive block (618) whose two ends can abut against the inside of the card-in slot (57), and the lower surface of the first movable plate (69) is fixedly installed with a first longitudinal movable rod (611) which passes through the interlayer structure of the second insulating core (61) and the gas limiting flow chamber (66), and the second insulating core (61) is embedded with a sealing ring (612) which can prevent gas leakage at the part penetrated by the first longitudinal movable rod (611), and the first longitudinal movable rod (611) is located in the first movable chamber (64) of the first component. A No. 1 coil spring (610) in a compressed state is placed on the outer periphery of the rod body, and a gap for gas flow exists between the inner circumference of the gas limiting flow cavity (66) and the outer circumference of the No. 1 longitudinal movable rod (611). The No. 1 longitudinal movable rod (611) is fixedly installed with a piston plate (613) capable of axially moving along the No. 2 component movable cavity (67) at its bottom end located inside the No. 2 component movable cavity (67). The bottom end of the piston plate (613) is fixedly installed with a No. 2 longitudinal movable rod (614) capable of rotatable movement through a bearing. The bottom end of the No. 2 longitudinal movable rod (614) is fixedly installed with a wing-shaped movable plate (615) capable of axially moving along the wing-shaped limiting through hole (68). The bottom end of the wing-shaped movable plate (615) is fixedly installed with a No. 3 longitudinal movable rod (616). The bottom end of the No. 3 longitudinal movable rod (616) is fixedly installed with a No. 1 force plate (617).

6. A high voltage load isolating switch according to claim 5, characterized in that: The structural shape of the cross section of the through hole (65) of the second component is consistent with the structural shape of the cross section of the fifth longitudinal movable rod (622), both of which are polygonal structures, and the structural dimensions of the cross section of the through hole (65) of the second component match the structural dimensions of the cross section of the fifth longitudinal movable rod (622).

7. A high voltage load isolating switch according to claim 5, characterized in that: The structural shape of the cross section of the wing-shaped limiting through hole (68) is consistent with the structural shape of the cross section of the wing-shaped movable plate (615), and the structural dimensions of the cross section of the wing-shaped limiting through hole (68) match the structural dimensions of the cross section of the wing-shaped movable plate (615).

8. A high voltage load isolating switch according to any one of claims 2 to 7, characterized in that: It also includes a threaded pre-tightening fastening mechanism (7), which is internally provided with a longitudinal hollow shell (71) with an internal hollow structure that abuts against the bottom of the middle mounting seat (1), a longitudinal threaded rod (711) installed in the internal threaded hole (58) in the form of a threaded structure, and a No. 2 coil spring (710) that enables the longitudinal threaded rod (711) to generate a downward elastic pre-tightening force.

9. A high voltage load isolating switch according to claim 8, characterized in that: The threaded pre-tightening fastening mechanism (7) comprises a longitudinal hollow shell (71), the upper end surface of the longitudinal hollow shell (71) is provided with a No. 2 fixing plate (72) which is integrally structured with the shell and abuts against the bottom of the middle mounting seat (1), the interior of the longitudinal hollow shell (71) is provided with a No. 3 component active cavity (73), the top of the longitudinal hollow shell (71) is provided with a No. 3 component through-hole (74) which connects the bottom end of the No. 1 component through-hole (3) and the top end of the No. 3 component active cavity (73), the bottom end of the longitudinal hollow shell (71) is provided with a No. 4 component through-hole (75) which connects the space below it and the bottom end of the No. 3 component active cavity (73), and the longitudinal hollow shell (71) is provided with a No. 3 component active cavity (73) which can be moved along the No. 3 component active cavity (73) ) A second movable plate (76) that can move axially, a component mounting hole (77) is provided at the center of the second movable plate (76), a fourth longitudinal movable rod (78) that can rotate is installed in the component mounting hole (77) through a bearing on the second movable plate (76), a second force plate (79) is fixedly installed at the bottom end of the fourth longitudinal movable rod (78), a longitudinal threaded rod (711) that passes through the third component through hole (74) and the first component through hole (3) is fixedly installed at the top end of the fourth longitudinal movable rod (78), and an external thread structure that matches the internal thread structure is provided on the rod body of the longitudinal threaded rod (711), and a second coil spring (710) that exerts downward elastic pressure on the second movable plate (76) is placed in the third component movable cavity (73).

10. A high voltage load isolating switch according to claim 9, characterized in that: The structural shape of the cross section of the movable cavity (73) of the third component is consistent with the structural shape of the cross section of the second movable plate (76), both of which are polygonal structures, and the structural dimensions of the cross section of the movable cavity (73) of the third component match the structural dimensions of the cross section of the second movable plate (76).

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