A high voltage isolating switch and a power distribution cabinet

Abstract

The present invention discloses a high-voltage disconnector and a power distribution cabinet, belonging to the technical field of disconnectors. It includes an insulating platform, an insulating column unit, a moving contact unit, a static contact unit, a power connection unit and a switch control unit. The insulating column unit is provided with three groups, and each group of insulating column units is composed of two insulating columns fixed to the top surface of the insulating platform; the moving contact unit includes an insulating movable arm rotatably provided on the top surface of the insulating column, and an insulating sliding platform is slidably provided inside the insulating movable arm; a moving contact is embedded and fixed at the front end of the insulating sliding platform; a sliding plate is integrally formed at one end of the insulating sliding platform away from the moving contact, and a force bearing seat is provided between adjacent sliding plates, and the force bearing seat is fixed to the inner bottom surface of the insulating movable arm; a transmission rod slides through the force bearing seat. The high-voltage disconnector and the power distribution cabinet of the present invention can completely separate the moving contact and the static contact of the high-voltage disconnector during maintenance to ensure the safety of maintenance.

Description

Technical Field

[0001] The present invention specifically relates to a high-voltage isolating switch and a power distribution cabinet, and belongs to the technical field of isolating switches. Background Art

[0002] High-voltage disconnectors are important electrical appliances in power plants, substations, and various electrical supply and use systems. They are used to switch live high-voltage lines and isolate live high-voltage lines from electrical equipment such as high-voltage busbars or circuit breakers under maintenance, ensuring the safety of high-voltage electrical appliances and devices during maintenance work and isolating voltage. The contacts of the disconnectors and the parts that come into contact with the contacts are silver-plated. When the disconnectors are opened and closed, friction will always occur in these parts. If sand and dust invade, the friction will intensify, which will eventually lead to increased resistance when closed, which may cause power outages. For this reason, China Patent Authorization Announcement No.: CN118136440B, discloses a high-voltage disconnector and distribution cabinet, including two left and right insulating columns, both of which are equipped with wiring terminals, a U-shaped plug fixedly installed on the right wiring terminal, a contact A fixedly installed in the U-shaped plug, a conductive mechanism installed on the left wiring terminal, a crossbeam hinged relative to it installed on the conductive mechanism, the crossbeam is closed when it is horizontal, the right end of the crossbeam extends above the U-shaped plug, an opening and closing mechanism is installed at the bottom of the right end of the crossbeam, the U-shaped plug can be stuck in the opening and closing mechanism when closed, a follower rod is installed at the bottom of the crossbeam, and the follower rod slides elastically left and right relative to the crossbeam. The high-voltage disconnector and distribution cabinet can achieve self-lubrication and more than 10,000 times of closing by setting the opening and closing mechanism, the follower rod, and the U-shaped plug, but the contact A and the contact B of the structure are difficult to align, and the contact A and the contact B are prone to collision and deformation during alignment; and after the crossbeam operating contacts of the structure are separated, they are easy to reclose due to their own weight. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes a high-voltage isolating switch and a power distribution cabinet. During maintenance, the moving contact and the static contact of the high-voltage isolating switch can be completely separated to ensure the safety of maintenance.

[0004] The high-voltage isolating switch of the present invention comprises:

[0005] Insulation platform;

[0006] Insulating column units, wherein the insulating column units are provided in three groups, and each group of insulating column units is composed of two insulating columns fixed opposite to each other on the top surface of the insulating platform;

[0007] A moving contact unit, the moving contact unit comprises an insulating movable arm rotatably arranged on the top surface of the insulating column, an insulating slide is slidably arranged inside the insulating movable arm; a moving contact is fixedly engaged with the front end of the insulating slide; a slide is integrally formed at one end of the insulating slide away from the moving contact, a force-bearing seat is arranged between adjacent slides, and the force-bearing seat is fixed to the inner bottom surface of the insulating movable arm; a transmission rod slides through the force-bearing seat, one end of the transmission rod is fixed to the insulating slide, and the other end movably penetrates into the slide cylinder and is fixed to the inside of the slide cylinder, and a spring body is sleeved between the slide cylinder and the force-bearing seat on the transmission rod; a head is fixed to the end of the insulating movable arm away from the moving contact by bolts; the slide cylinder movably passes through the head;

[0008] A stationary contact unit, the stationary contact unit comprising an insulating jacket fixed to the top surface of the insulating column; a stationary contact in contact with the moving contact is fixed inside the insulating jacket;

[0009] An electric connection unit, the electric connection unit comprises an inner conductive plate embedded in the top surface of the front side of the insulating slide, the bottom surface of the inner conductive plate is in contact with the moving contact, and the inner conductive plate and the moving contact are fastened by bolts; a row of conductive seats are fixed on the top surface of the inner conductive plate, and elastic contacts are hinged on the conductive seats; a limited position block is integrally formed on the front side of the conductive seat, and an elastic pressure plate in contact with the elastic contact is integrally formed on the rear side of the conductive seat; a conductive connector is screwed to the hinged end of the elastic contact, and the conductive connector is connected to the inner conductive plate through a busbar; an electric connection seat plate is fixed on the top surface of the inner wall of the insulating movable arm, and a plurality of conductive clamping seats pressed with the elastic contacts are integrally formed on the electric connection seat plate; a first terminal electrically connected to the electric connection seat plate is fixed to the outside of the insulating movable arm; a second terminal electrically connected to the static contact is fixed to the outside of the insulating jacket;

[0010] A switch control unit is fixed to the top surface of the insulating platform through an insulating column; the switch control unit abuts against the outer end of the sliding cylinder.

[0011] When the high-voltage disconnector needs to be closed, the switch control unit is controlled, and the switch control unit drives the slide to move toward the side of the static contact. The slide compresses the spring body, thereby driving the transmission rod to slide along the force-bearing seat, and the transmission rod pushes the insulating slide forward. The inner conductive plate on the insulating slide is pushed forward synchronously, so that the conductive connector on the inner conductive plate is pressed toward the side of the power connection seat. At this time, the elastic contact is engaged with the conductive holder, and as the insulating slide is advanced, the elastic contact is pressed against the elastic pressure plate, and the elastic pressure plate can elastically press the elastic contact and the conductive holder. At the same time, the static contact and the moving contact are synchronously pressed to achieve close contact between the power connection unit, the static contact unit and the moving contact unit; at this time, the first terminal, the power connection seat, the conductive holder, the elastic contact, the busbar, the inner conductive plate, the moving contact, the static contact, and the second terminal are electrically connected in sequence.

[0012] The cam is fixed to the upper side of the guide rail, and the cam is fixed on the lower side of the guide rail, and the cam is fixed on the lower side of the guide rail.

[0013] When the moving contact unit and the stationary contact unit need to be aligned, the insulating hand rod is pushed up to disengage the chuck from the limit lock seat, and then the insulating hand rod is pulled to make the end of the card plate press against the in-place limit block. When the card plate slides, the insulating movable arm is synchronously driven to move through the card block of the card plate, so that the insulating movable arm swings along the top of the insulating column. When the end of the card plate presses against the in-place limit block, the insulating movable arm is synchronously limited by the card block. Then, the insulating hand rod is pressed down to re-engage the insulating hand rod with the limit lock seat, and the chuck is engaged with the front end face of the limit lock seat on the front side, so as to achieve precise alignment of the moving contact unit and the stationary contact unit; then, the linear drive unit drives the pressure plate to push forward, pushes the slide cylinder forward, and achieves elastic and close contact between the moving contact and the stationary contact;

[0014] When the moving contact unit and the stationary contact unit need to be misaligned, first control the linear drive unit to drive the pressure plate backward to separate the moving contact and the stationary contact from each other; then, push up the insulating hand rod to disengage the chuck from the limit lock seat, then push the insulating hand rod to make the card plate slide along the slide rail, and the card block of the card plate slides synchronously, driving the insulating movable arm to swing along the top of the insulating column, so that the moving contact unit and the stationary contact unit are misaligned; thereby, the moving contact unit, the stationary contact unit and the power connection unit can be separated from each other.

[0015] Furthermore, a pin hole seat is fixed at the end of the guide groove seat, and the pin hole seat is movably inserted with a limit pin from the inside to the outside; when the pressure plate is pushed into place, the limit pin is pushed forward to achieve the engagement of the limit pin and the pressure plate, thereby achieving manual position locking; when unlocking is required, the limit pin is first pulled outward to separate the limit pin from the pressure plate.

[0016] Furthermore, the linear drive unit is a hydraulic cylinder or a manual hydraulic jack, the piston rod of the hydraulic cylinder or the manual hydraulic jack extends into the inner side of the guide groove seat and is fixed to the pressure plate; when the manual hydraulic jack is actuated, the manual hydraulic jack is driven to actuate by the manual pressure hand, so that the piston rod of the manual hydraulic jack is pushed out or retracted, driving the pressure plate forward or backward.

[0017] Furthermore, the rod chamber and the rodless chamber of the hydraulic cylinder are both connected with a control pipeline, and the control pipeline includes a one-way valve and a switch valve connected in parallel with each other, one end of the one-way valve and the switch valve is connected in series to the rod chamber or the rodless chamber of the hydraulic cylinder; the other end of the one-way valve is connected to a manual pump connector, and the manual pump connector is connected to a liquid tank; the other end of the switch valve is connected to the liquid tank; during operation, when the piston rod of the hydraulic cylinder needs to be extended, the switch valve corresponding to the rodless chamber is opened, and the manual pump is connected to the manual pump connector corresponding to the rod chamber, then the manual pump is shaken to The hydraulic oil in the liquid tank is pumped into the hydraulic cylinder, and the piston rod is pushed out by the hydraulic oil. After it is pushed out into place, the manual pump is removed from the manual pump joint. At this time, self-locking is achieved by using the one-way valve. When the piston rod of the hydraulic cylinder needs to be retracted, the switch valve corresponding to the rod chamber is opened, and the manual pump is connected to the manual pump joint corresponding to the rodless chamber. Then, the manual pump is shaken to pump the hydraulic oil in the liquid tank into the rodless chamber of the hydraulic cylinder through the manual pump, and the piston rod is pressed back by the hydraulic oil. After the piston rod is retracted into place, the manual pump is removed from the manual pump joint. At this time, self-locking is achieved by using the one-way valve.

[0018] Furthermore, the linear drive unit is a screw drive, and the slider of the screw drive is fixed to the pressure plate; the driving end of the screw drive is installed with a gear commutator, and the input end of the gear commutator is provided with a rocker plug; when in use, the rocker plug is inserted into the socket of the gear commutator, and the rocker plug is rotated, thereby driving the gear commutator to rotate, and the gear commutator drives the screw of the screw drive to rotate synchronously, and the screw drives the slider to move forward or backward, thereby realizing the forward and backward movement of the pressure plate.

[0019] Furthermore, the movable contact and the stationary contact are integrally formed with mutually engaging conductive teeth near one end of each other; the top and bottom surfaces of the movable contact are integrally formed with a conductive insert plate, and the outer side of the conductive insert plate is integrally formed with a plurality of conductive ribs; the top and bottom surfaces of the stationary contact are integrally formed with a conductive card slot, the conductive insert plate is movably engaged with the conductive card slot, and a plurality of inner contact grooves are provided on the inner side of the conductive card slot; the conductive ribs are movably engaged with the inner contact grooves, and when the movable contact and the stationary contact are in contact, good contact between the movable contact and the stationary contact is achieved through the engagement between the conductive teeth, and at the same time, conductive contact surfaces are formed on the top and bottom surfaces of the movable contact and the stationary contact by the engagement of the conductive insert plate and the conductive card slot, so that the movable contact and the stationary contact present a three-dimensional plug-in structure, and the conductive ribs are engaged with the inner contact grooves to further improve the stability of the mechanical connection between the movable contact and the stationary contact, and at the same time, good conductivity of the movable contact and the stationary contact can be ensured.

[0020] Furthermore, a sloped platform is provided on the inner side of the conductive socket, and the front end of the elastic contact is integrally formed with a sloped surface pressed against the sloped platform; when the elastic contact is engaged with the conductive socket, the two sides of the elastic contact are tightly fitted against the two sides of the inner wall of the conductive socket, and the sloped surface of the elastic contact is tightly pressed against the sloped platform of the conductive socket, thereby ensuring a tight connection between the conductive socket and the elastic contact, and achieving good electrical connection between the power connection unit and the moving contact.

[0021] A power distribution cabinet comprises a high-voltage isolating switch and a power distribution cabinet body, wherein the high-voltage isolating switch is arranged inside the power distribution cabinet body.

[0022] Compared with the prior art, the high-voltage disconnector and distribution cabinet of the present invention can ensure that the power connection unit, the moving contact and the static contact are in close contact during normal power supply, thereby ensuring good conductivity; when the line needs to be disconnected, the moving contact unit, the static contact unit and the power connection unit can be separated in three stages, and separated by rotating the insulating movable arm, so that the moving contact and the static contact of the high-voltage disconnector can be completely separated during equipment maintenance, thereby ensuring the safety of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure is a schematic diagram of the overall structure of the high-voltage isolating switch driven by a manual hydraulic jack according to the present invention.

[0024] Figure 2 It is a schematic diagram of the installation structure of the insulating column, the moving contact unit and the stationary contact unit of the present invention.

[0025] Figure 3 It is a schematic diagram of the structure of the insulating column installed with the moving contact unit of the present invention.

[0026] Figure 4 It is a schematic diagram of the internal structure of the insulating movable arm of the present invention.

[0027] Figure 5For the present invention Figure 4 Schematic diagram of the local enlarged structure at point A in the middle.

[0028] Figure 6 It is a schematic diagram of the installation structure of the moving contact and the stationary contact of the present invention.

[0029] Figure 7 It is a schematic diagram of the installation structure of the conductive seat and the elastic contact of the present invention.

[0030] Figure 8 It is a schematic diagram of the installation structure of various components on the insulating slide of the present invention.

[0031] Fig. 9 It is a schematic diagram of the sliding cooperation structure of the insulating movable arm and the insulating sliding table of the present invention.

[0032] Fig.10 For the present invention Figure 8 Schematic diagram of the local enlarged structure at point B in the middle.

[0033] Fig.11 The figure is a schematic diagram of the overall structure of the high-voltage isolating switch driven by a manual pump and a hydraulic cylinder according to the present invention.

[0034] Fig.12 The figure is a schematic diagram of the overall structure of a high-voltage disconnector driven by a rod driver according to the present invention.

[0035] Figure numerals: 1, insulating platform, 2, insulating column, 3, insulating movable arm, 4, insulating slide, 5, moving contact, 6, slide plate, 7, force seat, 8, transmission rod, 9, slide cylinder, 10, spring body, 11, head, 12, insulating jacket, 13, static contact, 14, inner conductive plate, 15, conductive seat, 16, elastic contact, 17, limit block, 18, elastic pressure plate, 19, conductive joint, 20, busbar, 21, power connection seat plate, 22, conductive card seat, 23, first terminal, 24, second terminal , 25. guide groove seat, 26. pressure plate, 27. guide rod, 28. slide rail, 29. card plate, 30. card block, 31. ear seat, 32. insulating hand rod, 33. chuck, 34. limit lock seat, 35. pin hole seat, 36. limit pin, 37. hydraulic cylinder, 38. manual hydraulic jack, 39. one-way valve, 40. switch valve, 41. manual pump connector, 42. liquid tank, 43. screw drive, 44. gear commutator, 45. conductive panel, 46. conductive card rib, 47. conductive card bin. DETAILED DESCRIPTION

[0036] Example:

[0037] like Figures 1 to 12 The high voltage disconnect switch shown comprises:

[0038] Insulation platform 1;

[0039] Insulating column units, wherein three groups of insulating column units are provided, and each group of insulating column units is composed of two insulating columns 2 fixed to the top surface of the insulating platform 1 facing each other;

[0040] A moving contact unit, the moving contact unit comprises an insulating movable arm 3 rotatably arranged on the top surface of the insulating column 2, an insulating slide 4 is slidably arranged inside the insulating movable arm 3; a moving contact 5 is fixedly engaged with the front end of the insulating slide 4; a slide plate 6 is integrally formed at one end of the insulating slide 4 away from the moving contact 5, a force-bearing seat 7 is arranged between adjacent slide plates 6, and the force-bearing seat 7 is fixed to the inner bottom surface of the insulating movable arm 3; a transmission rod 8 slides through the force-bearing seat 7, one end of the transmission rod 8 is fixed on the insulating slide 4, and the other end movably penetrates into the slide cylinder 9 and is fixed inside the slide cylinder 9, and the transmission rod 8 is sleeved with a spring body 10 between the slide cylinder 9 and the force-bearing seat 7; a head 11 is fixed to the end of the insulating movable arm 3 away from the moving contact 5 by bolts; the slide cylinder 9 movably passes through the head 11;

[0041] A stationary contact unit, the stationary contact unit comprising an insulating jacket 12 fixed to the top surface of the insulating column 2; a stationary contact 13 in contact with the moving contact 5 is fixed inside the insulating jacket 12;

[0042] The power connection unit includes an inner conductive plate 14 embedded with the top surface of the front side of the insulating slide 4, the bottom surface of the inner conductive plate 14 is in contact with the moving contact 5, and the inner conductive plate 14 and the moving contact 5 are fastened by bolts; a row of conductive seats 15 are fixed on the top surface of the inner conductive plate 14, and elastic contacts 16 are hinged on the conductive seats 15; the front side of the conductive seat 15 is integrally formed with a limit block 17, and the rear side of the conductive seat 15 is integrally formed with an elastic pressure plate 18 in contact with the elastic contact 16; The elastic contact 16 is screwed with a conductive connector 19 at the hinged end, and the conductive connector 19 is connected to the inner conductive plate 14 through a busbar 20; a power connection base plate 21 is fixed to the top surface of the inner wall of the insulating movable arm 3, and a plurality of conductive holders 22 pressed with the elastic contact 16 are integrally formed on the power connection base plate 21; a first wiring terminal 23 electrically connected to the power connection base plate 21 is fixed to the outside of the insulating movable arm 3; a second wiring terminal 24 electrically connected to the static contact 13 is fixed to the outside of the insulating jacket 12;

[0043] The switch control unit is fixed to the top surface of the insulating platform 1 through the insulating column 2; the switch control unit abuts against the outer end of the sliding cylinder 9.

[0044] When the high-voltage disconnector needs to be closed, the switch control unit is controlled, and the switch control unit drives the slide 9 to move toward the side of the static contact 13. The slide 9 compresses the spring body 10, thereby driving the transmission rod 8 to slide along the force-bearing seat 7. The transmission rod 8 pushes the insulating slide 4 forward, and the inner conductive plate 14 on the insulating slide 4 is pushed forward synchronously, so that the conductive connector 19 on the inner conductive plate 14 is pressed toward the side of the power connection seat plate 21. At this time, the elastic contact 16 is engaged with the conductive holder 22, and along with the insulating slide 4 is pushed forward, the elastic contact 16 is pressed against the elastic pressure plate 18, and the elastic pressure plate 18 can elastically press the elastic contact 16 and the conductive holder 22, and at the same time, the static contact 13 and the movable contact 5 are synchronously pressed, so that the power connection unit, the static contact 13 unit and the movable contact 5 unit are in close contact; at this time, the first wiring terminal 23, the power connection seat plate 21, the conductive holder 22, the elastic contact 16, the busbar 20, the inner conductive plate 14, the movable contact 5, the static contact 13 and the second wiring terminal 24 are electrically connected in sequence.

[0045] The switch control unit includes a guide slot seat 25 fixed to the top surface of the insulating column 2, a pressure plate 26 is arranged inside the guide slot seat 25, the slide 9 is movably arranged on the inner surface of the guide slot seat 25 and fits with the pressure plate 26; a plurality of guide rods 27 are fixed to the side of the pressure plate 26 away from the slide 9, and the guide rods 27 movably pass through the guide slot seat 25; a linear drive unit is fixed to the end of the guide slot seat 25 away from the slide 9, the movable end of the linear drive unit extends into the inner side of the guide slot seat 25 and is fixed to the pressure plate 26; a plurality of guide rods 27 are fixed to the top surface of the guide slot seat 25 A slide rail 28 is provided, on which a card plate 29 is slidably engaged, and one of the slide rails 28 at the end is integrally formed with an in-position limit block 17; the bottom surface of the card plate 29 is integrally formed with a card block 30 that is clamped with the outside of the insulating movable arm 3; the middle part of the card plate 29 is integrally formed with an ear seat 31, on which an insulating hand rod 32 is hinged; a chuck 33 is fixed on the insulating hand rod 32, and two groups of limit lock seats 34 are fixed on the top surface of the slide rail 28; the insulating hand rod 32 is movably clamped with the limit lock seat 34, and the chuck 33 is clamped with the end face of the limit lock seat 34.

[0046] When the movable contact 5 unit and the static contact 13 unit need to be aligned, the insulating hand rod 32 is pushed up to disengage the chuck 33 from the limit lock seat 34, and then the insulating hand rod 32 is pulled to make the end of the card plate 29 press against the in-place limit block 17. When the card plate 29 slides, the insulating movable arm 3 is synchronously driven to move by the block 30 of the card plate 29, so that the insulating movable arm 3 swings along the top of the insulating column 2. When the end of the card plate 29 presses against the in-place limit block 17, the insulating movable arm 3 is synchronously limited by the block 30. Then, the insulating hand rod 32 is pressed down to make the insulating hand rod 32 engage with the limit lock seat 34 again, and the chuck 33 engages with the front end face of the limit lock seat 34 on the front side, so as to realize the precise alignment of the movable contact 5 unit and the static contact 13 unit; then, the linear drive unit drives the pressing plate 26 to push forward, pushes the slide cylinder 9 forward, and realizes the elastic and tight contact between the movable contact 5 and the static contact 13;

[0047] When the moving contact 5 unit and the stationary contact 13 unit need to be misaligned, first control the linear drive unit to drive the pressure plate 26 to move backward, so that the moving contact 5 and the stationary contact 13 are separated from each other; then, push up the insulating hand rod 32 to disengage the chuck 33 from the limit lock seat 34, then push the insulating hand rod 32 to make the card plate 29 slide along the slide rail 28, and the card block 30 of the card plate 29 slides synchronously, driving the insulating movable arm 3 to swing along the top of the insulating column 2, so that the moving contact 5 unit and the stationary contact 13 unit are misaligned; thereby, the moving contact 5 unit, the stationary contact 13 unit and the power connection unit can be separated from each other.

[0048] A pin hole seat 35 is fixed at the end of the guide groove seat 25, and the pin hole seat 35 is movably inserted with a limit pin 36 from the inside to the outside; when the pressure plate 26 is pushed into place, the limit pin 36 is pushed forward to achieve the engagement of the limit pin 36 and the pressure plate 26, thereby achieving manual position locking; when unlocking is required, the limit pin 36 is first pulled outward to disengage the limit pin 36 from the pressure plate 26.

[0049] The linear drive unit is a hydraulic cylinder 37 or a manual hydraulic jack 38, the piston rod of the hydraulic cylinder 37 or the manual hydraulic jack 38 extends into the inner side of the guide slot seat 25 and is fixed to the pressure plate 26; when the manual hydraulic jack 38 is actuated, the manual hydraulic jack 38 is driven to actuate by the manual pressure hand, so that the piston rod of the manual hydraulic jack 38 is pushed out or retracted, driving the pressure plate 26 to move forward or backward.

[0050] The rod chamber and the rodless chamber of the hydraulic cylinder 37 are both connected to a control pipeline, and the control pipeline includes a one-way valve 39 and a switch valve 40 connected in parallel to each other, one end of the one-way valve 39 and the switch valve 40 are connected in series to the rod chamber or the rodless chamber of the hydraulic cylinder 37; the other end of the one-way valve 39 is connected to a manual pump connector 41, and the manual pump connector 41 is connected to a liquid tank 42; the other end of the switch valve 40 is connected to the liquid tank 42; during operation, when the piston rod of the hydraulic cylinder 37 needs to be extended, the switch valve 40 corresponding to the rodless chamber is opened, and the manual pump is connected to the manual pump connector 41 corresponding to the rod chamber, and then the manual pump is shaken to manually The pump pumps the hydraulic oil in the liquid tank 42 into the hydraulic cylinder 37, and the piston rod is pushed out by the hydraulic oil. After it is pushed out into place, the manual pump is removed from the manual pump connector 41. At this time, self-locking is achieved by using the one-way valve 39. When the piston rod of the hydraulic cylinder 37 needs to be retracted, the switch valve 40 corresponding to the rod chamber is opened, and the manual pump is connected to the manual pump connector 41 corresponding to the rodless chamber. Then, the manual pump is shaken to pump the hydraulic oil in the liquid tank 42 into the rodless chamber of the hydraulic cylinder 37 through the manual pump, and the piston rod is pressed back by the hydraulic oil. After the piston rod is retracted into place, the manual pump is removed from the manual pump connector 41. At this time, self-locking is achieved by using the one-way valve 39.

[0051] The linear drive unit is a screw driver 43, and the slider of the screw driver 43 is fixed to the pressure plate 26; a gear commutator 44 is installed at the driving end of the screw driver 43, and a rocker plug is provided at the input end of the gear commutator 44; when in use, the rocker plug is inserted into the socket of the gear commutator 44, and the rocker plug is rotated, thereby driving the gear commutator 44 to rotate, and the gear commutator 44 drives the screw of the screw driver 43 to rotate synchronously, and the screw drives the slider to move forward or backward, thereby realizing the forward and backward movement of the pressure plate 26.

[0052] The movable contact 5 and the stationary contact 13 are integrally formed with mutually engaging conductive teeth at one end close to each other; the movable contact 5 is integrally formed with a conductive insert plate 45 on the top and bottom surfaces, and a plurality of conductive ribs 46 are integrally formed on the outside of the conductive insert plate 45; the stationary contact 13 is integrally formed with a conductive card slot 47 on the top and bottom surfaces, and the conductive insert plate 45 is movably engaged with the conductive card slot 47, and a plurality of inner contact grooves are provided on the inner side of the conductive card slot 47; the conductive ribs 46 are movably engaged with the inner contact grooves, and the movable contact 5 and When the static contact 13 is in contact, the engagement between the conductive teeth enables good contact between the moving contact 5 and the static contact 13. At the same time, by engaging the conductive insert plate 45 and the conductive card slot 47, conductive contact surfaces are formed on the top and bottom surfaces of the moving contact 5 and the static contact 13, so that the moving contact 5 and the static contact 13 present a three-dimensional plug-in structure. The conductive clamping rib 46 and the inner contact groove are engaged to further improve the stability of the mechanical connection between the moving contact 5 and the static contact 13, and at the same time ensure good conductivity of the moving contact 5 and the static contact 13.

[0053] A sloped platform is arranged on the inner side of the conductive holder 22, and a sloped surface pressed against the sloped platform is integrally formed at the front end of the elastic contact 16; when the elastic contact 16 is engaged with the conductive holder 22, the two sides of the elastic contact 16 are tightly fitted against the two sides of the inner wall of the conductive holder 22, and the sloped surface of the elastic contact 16 is tightly pressed against the sloped platform of the conductive holder 22, thereby ensuring a tight connection between the conductive holder 22 and the elastic contact 16, and achieving good electrical connection between the power connection unit and the moving contact 5.

[0054] A power distribution cabinet comprises a high-voltage isolating switch and a power distribution cabinet body, wherein the high-voltage isolating switch is arranged inside the power distribution cabinet body.

[0055] The above embodiments are only preferred implementations of the present invention, so any equivalent changes or modifications made according to the structures, features and principles described in the scope of application of the present invention are included in the scope of application of the present invention.

Claims

1. A high voltage isolating switch, characterized in that: include: Insulation table, Insulating column units, wherein the insulating column units are provided in three groups, and each group of insulating column units is composed of two insulating columns fixed opposite to each other on the top surface of the insulating platform; A moving contact unit, the moving contact unit comprises an insulating movable arm rotatably arranged on the top surface of the insulating column, an insulating slide is slidably arranged inside the insulating movable arm; a moving contact is fixedly engaged with the front end of the insulating slide; a slide is integrally formed at one end of the insulating slide away from the moving contact, a force-bearing seat is arranged between adjacent slides, and the force-bearing seat is fixed to the inner bottom surface of the insulating movable arm; a transmission rod slides through the force-bearing seat, one end of the transmission rod is fixed to the insulating slide, and the other end movably penetrates into the slide cylinder and is fixed to the inside of the slide cylinder, and a spring body is sleeved between the slide cylinder and the force-bearing seat on the transmission rod; a head is fixed to the end of the insulating movable arm away from the moving contact by bolts; the slide cylinder movably passes through the head; A stationary contact unit, the stationary contact unit comprising an insulating jacket fixed to the top surface of the insulating column; a stationary contact in contact with the moving contact is fixed inside the insulating jacket; An electric connection unit, the electric connection unit comprises an inner conductive plate embedded in the top surface of the front side of the insulating slide, the bottom surface of the inner conductive plate is in contact with the moving contact, and the inner conductive plate and the moving contact are fastened by bolts; a row of conductive seats are fixed on the top surface of the inner conductive plate, and elastic contacts are hinged on the conductive seats; a limited position block is integrally formed on the front side of the conductive seat, and an elastic pressure plate in contact with the elastic contact is integrally formed on the rear side of the conductive seat; a conductive connector is screwed to the hinged end of the elastic contact, and the conductive connector is connected to the inner conductive plate through a busbar; an electric connection seat plate is fixed on the top surface of the inner wall of the insulating movable arm, and a plurality of conductive clamping seats pressed with the elastic contacts are integrally formed on the electric connection seat plate; a first terminal electrically connected to the electric connection seat plate is fixed to the outside of the insulating movable arm; a second terminal electrically connected to the static contact is fixed to the outside of the insulating jacket; A switch control unit, the switch control unit is fixed to the top surface of the insulating platform through an insulating column; the switch control unit abuts against the outer end of the sliding cylinder; The cam is fixedly provided with a push-button on the inner side of the guide groove, and the push-button is engaged with the push-button on the inner side of the guide groove.

2. The high voltage disconnector according to claim 1, characterized in that: A pin hole seat is fixed at the end of the guide groove seat, and the pin hole seat is movably inserted with a limiting pin from the inside to the outside.

3. The high voltage disconnector according to claim 1, characterized in that: The linear drive unit is a hydraulic cylinder or a manual hydraulic jack, and the piston rod of the hydraulic cylinder or the manual hydraulic jack extends into the inner side of the guide groove seat and is fixed to the pressure plate.

4. The high voltage disconnector according to claim 3, characterized in that: The rod chamber and the rodless chamber of the hydraulic cylinder are both connected to a control pipeline, and the control pipeline includes a one-way valve and a switch valve connected in parallel to each other, one end of the one-way valve and the switch valve is connected in series to the rod chamber or the rodless chamber of the hydraulic cylinder; the other end of the one-way valve is connected to a manual pump connector, and the manual pump connector is connected to a liquid tank; the other end of the switch valve is connected to the liquid tank.

5. The high voltage disconnector according to claim 1, characterized in that: The linear drive unit is a screw drive, and the slider of the screw drive is fixed to the pressure plate; a gear commutator is installed at the driving end of the screw drive, and a rocker arm is provided at the input end of the gear commutator.

6. The high voltage disconnector according to claim 1, characterized in that: The movable contact and the stationary contact are integrally formed with mutually engaging conductive teeth at one end close to each other; the top and bottom surfaces of the movable contact are integrally formed with a conductive insert, and the outside of the conductive insert is integrally formed with a plurality of conductive ribs; the top and bottom surfaces of the stationary contact are integrally formed with a conductive card slot, the conductive insert is movably engaged with the conductive card slot, and a plurality of inner contact grooves are provided on the inner side of the conductive card slot; the conductive ribs are movably engaged with the inner contact grooves.

7. The high voltage disconnector according to claim 1, characterized in that: A slope platform is arranged inside the conductive holder, and a slope surface pressed with the slope platform is integrally formed at the front end of the elastic contact.

8. A power distribution cabinet, comprising the high-voltage disconnector according to any one of claims 1 to 7, characterized in that: It also includes a power distribution cabinet, and the high-voltage isolating switch is arranged inside the power distribution cabinet.

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