High-efficiency test device for high-voltage circuit breaker

Abstract

The invention discloses a high-efficiency test device for a high-voltage circuit breaker, and the device comprises an operating mechanism box, a spring control mechanism which is movably disposed in the operating mechanism box in an embedded manner, and an electric control mechanism which is fixedly disposed below the operating mechanism box and is in transmission connection with the spring control mechanism. The magnetorheological fluid in the corrugated square tube is squeezed into the telescopic rod, so that the telescopic rod extends out to bend and deform the memory metal sheet, and at the moment, the distance between the bent and deformed memory metal sheet and the static contact and the distance between the bent and deformed memory metal sheet and the moving contact are smaller than those between the static contact and the moving contact. When the vacuum degree is damaged, point contact type spiral gathering electric arcs which move irregularly and are generated between the static contact and the moving contact are respectively contacted and circulated with the memory metal sheets, and at the moment, the electric arcs flow into the side edges of the static contact and the moving contact through the memory metal sheets. The arc is prevented from forming a point contact type gathering arc on the surfaces of the static contact and the moving contact to generate a melting pit, and the arc is further prevented from gathering an arc column in the melting pit.

Description

Technical Field

[0001] The invention relates to the field of circuit breaker equipment, in particular to a high-efficiency test device for a high-voltage circuit breaker. Background Art

[0002] The high-efficiency test device for high-voltage circuit breakers is a device used to perform performance tests and evaluations on high-voltage circuit breakers. The device can be used to conduct comprehensive tests on the electrical performance, insulation performance, breaking capacity, closing capacity, etc. of the circuit breaker to ensure that the circuit breaker can work stably and reliably during use. At the same time, the test device is used to perform load switch tests, short circuit tests, overvoltage tests, etc. on the circuit breaker to verify its performance under various working conditions, providing a reference for the selection and design of the equipment. Testing with an efficient test device can improve the performance and reliability of the circuit breaker and ensure the safe operation of the power system.

[0003] In the mechanical high-voltage circuit breaker experiment, it is necessary to continuously open and close the circuit in the vacuum interrupter to simulate various current and voltage circuit conditions. During the continuous opening and closing process, the frequent movement of the moving contact can easily cause external air to enter the interrupter and destroy the vacuum, resulting in a decrease in arc extinguishing performance. At this time, during the closing process, an arc will be generated between the moving and static contacts in the vacuum interrupter, and the arc currents on the moving and static contacts attract each other. When the metal bridge between the contacts is long, the arc forms an irregularly moving point contact concentrated arc on the contact. At the same time, the contact surface has a high temperature due to the large point contact arc resistance, which causes the contact surface to melt at high temperature and produce high The hot metal vapor will cause a molten pit. When the circuit breaker is closed, the arc changes from point contact to surface contact, and the point contact type concentrated arc will form a surface contact type concentrated arc column. This form of arc will be difficult to extinguish in the molten pit, which will aggravate the burning of the contacts and reduce the service life of the contacts and the vacuum interrupter (a large amount of metal vapor generated by the burning of the contacts will splash onto the shielding equipment in the vacuum interrupter, increasing the heat dissipation burden on the shielding cover in the vacuum interrupter, and at the same time increase the temperature of the insulating shell, resulting in a decrease in the performance of the insulating material and an increase in the risk of insulation breakdown, thereby affecting the overall insulation effect of the vacuum interrupter), thereby affecting subsequent high-voltage experiments.

[0004] Therefore, an efficient test device for high voltage circuit breaker is proposed. Summary of the invention

[0005] The object of the present invention is to provide an efficient testing device for high-voltage circuit breakers to solve the problem proposed in the above background technology that when the circuit breaker is closed, the arc changes from point contact to surface contact, and the point contact type concentrated arc will form a concentrated arc column. This type of arc will be difficult to extinguish in the molten pit, thereby aggravating the burning of the contacts and reducing the service life of the contacts and the vacuum interrupter.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A high-efficiency test device for a high-voltage circuit breaker comprises an operating mechanism box and a spring operating mechanism which is movably mounted in the operating mechanism box, and an electric control mechanism which is fixedly mounted below the operating mechanism box and is transmission-connected with the spring operating mechanism. A mounting frame is fixedly mounted on one side of the operating mechanism box and the electric control mechanism, and a vacuum arc extinguishing tube is arranged above the mounting frame. A static contact is arranged above the inner side of the vacuum arc extinguishing tube, and a moving contact is arranged below the static contact. Fixed rods are fixedly mounted around the inner side of the vacuum arc extinguishing tube at equal intervals. Fixed support plates are fixedly mounted below the fixed rods, and an air passage is penetrated on one side of the fixed support plates. Extrusion plates are arranged above the fixed support plates, and the extrusion plates are mounted in an inlaid manner on the inner side of the fixed rods.

[0008] The inner side of the extrusion plate is movably mounted with a corrugated square tube, a dial plate is fitted below the corrugated square tube, and the dial plate is movably mounted on the inner side of the extrusion plate, spring members are fixedly mounted on both sides of the inner side of the dial plate, a dial piece is fixedly mounted on one side of the spring member, and the dial piece is mounted in the dial plate, and a card slot is provided on both sides of the dial piece;

[0009] A limiting slide is provided above the extrusion plate, and the limiting slides are all embedded and installed on the inner side of the fixed rod. A memory metal sheet is movably embedded and installed below one side of the limiting slide, and the thickness of the memory metal sheet is set to decrease in sequence on the limiting slide. Electromagnetic sliding rods are fixedly installed at the four corners of one side of the memory metal sheet, and the electromagnetic sliding rods are all embedded and movably installed on the inner side of the limiting slide. A telescopic rod is provided in the middle of the electromagnetic sliding rod, and one side of the telescopic rod is fixedly installed on the inner side of the limiting slide, and the other side is set in contact with one side of the electromagnetic sliding rod.

[0010] In the above scheme, preferably: an inert gas tank is provided above the limiting slide plate, and the inert gas tank is fixedly installed above the inside of the vacuum arc extinguishing tube, a slide plate is fixedly installed on one side of the inert gas tank, and an opening and closing slide is movably installed in the slide plate.

[0011] In the above scheme, preferably: a nozzle is installed through the middle of the slide plate, and one side of the opening and closing slide is attached to the inner side of the nozzle, one side of the slide plate is connected through a corrugated conduit, and the corrugated conduit is embedded in the inner side of the limiting slide, a magnetorheological fluid is provided in the corrugated square tube, and the magnetorheological fluid is connected in series with the slide plate, the telescopic rod and the corrugated square tube through the corrugated conduit and filled.

[0012] In the above scheme, preferably: a vent hole is provided on the inner side of the shift plate, and the vent hole is connected through the limiting slide plate and the air duct on the fixed support plate, a bead groove is fixedly installed on the inner side of the shift plate, a spring bead is provided on the inner side of the bead groove, and the spring bead is movably connected to the groove in an engaging manner.

[0013] In the above scheme, preferably: a fixed partition is fixedly installed on one side of the operating mechanism box, and a plurality of insulating baffles are fixedly installed on one side of the fixed partition, a fixed bracket is provided between the insulating baffles, and the fixed bracket is fixedly installed on the fixed partition.

[0014] In the above scheme, preferably: an opening and closing lifting rod is provided under the fixed partition, and the opening and closing lifting rod is movably connected with the operating mechanism box through the inner side of the fixed partition, an insulating bracket is fixedly installed on the upper side of the mounting platform, a fixed support rod is embedded on the inner side of the insulating bracket, and the opening and closing lifting rod and the fixed support rod are movably connected in an embedded manner.

[0015] In the above scheme, preferably: a dynamic voltage rod is movably installed on the inner side of the opening and closing lifting rod, a connecting shaft is embedded and installed below the dynamic voltage rod, and the dynamic voltage rod is movably connected to the opening and closing lifting rod through the connecting shaft, a static voltage rod is fixedly installed below the fixed bracket, and power connection plates are fixedly installed on both the static voltage rod and the dynamic voltage rod.

[0016] In the above scheme, preferably: the static contact is fixedly installed below the static voltage rod, the moving contact is fixedly installed above the moving voltage rod, a shift rod is provided below the moving contact, and the shift rod is fixedly installed above the moving voltage rod at an equal distance.

[0017] In the above scheme, preferably: a disc-shaped groove is provided in the middle of the surface of the static contact and the moving contact, and arc grooves are provided on the static contact and the moving contact at equal intervals and surroundingly arranged.

[0018] The present invention provides an efficient test device for high-voltage circuit breakers, which has the following technical points and beneficial effects:

[0019] 1. The present invention designs structures such as a paddle plate, a paddle piece and a paddle rod. The paddle plate is driven to slide upward in the extrusion plate through the contact between the paddle rod and the paddle piece, so as to extrude the corrugated square tube in the extrusion plate, and then squeeze the magnetorheological fluid in the corrugated square tube into the telescopic rod, so that the telescopic rod is extended to bend the memory metal sheet. At this time, the distance between the bent and deformed memory metal sheet and the static contact and the moving contact is smaller than the distance between the static contact and the moving contact. When the vacuum is broken, the point-contact spiral concentrated arc with irregular movement generated between the static contact and the moving contact contacts and circulates with the memory metal sheet respectively. At this time, the arc flows into the sides of the static contact and the moving contact through the memory metal sheet to prevent the arc from forming a point-contact concentrated arc on the surface of the static contact and the moving contact to produce a molten pit, thereby avoiding the arc from forming a concentrated arc column in the molten pit.

[0020] 2. The present invention designs structures such as an inert gas tank, a slide plate, and an opening and closing slide plate. The magnetorheological fluid is used to push the opening and closing slide plate in the slide plate to slide, so that the opening on the opening and closing slide plate corresponds to the nozzle, and then the inert gas in the inert gas tank is ejected. At this time, the inert gas ejected from the inert gas tank will fill the vacuum arc extinguishing tube to prevent arcing during the opening and closing experiment. Secondly, the inert gas in the inert gas tank is a colored gas. After filling the vacuum arc extinguishing tube, the colored inert gas is ejected from the joint between the driven voltage rod and the vacuum arc extinguishing tube, forming an obvious visual warning for maintenance personnel to check and repair in time. At the same time, since the thickness of the memory metal sheet decreases successively, there is a time difference when the memory metal sheet is completely restored to the initial state, so that the inert gas ejected from the inert gas tank is a continuous process, so as to avoid the inert gas in the inert gas tank being ejected at the same time to make the air pressure in the vacuum arc extinguishing tube too high, resulting in a sudden increase in the internal pressure of the vacuum arc extinguishing tube of the arc extinguishing chamber, affecting the safe operation of the equipment.

[0021] 3. The present invention designs structures such as static contacts and moving contacts. When the static contacts and moving contacts are fitted together when the switch is closed, high-voltage current flows through the disc-shaped groove to form a U-shaped ring circuit, so that the current flows radially toward the edge to avoid concentrated direct current flow and local overheating, so as to increase the service life of the contact. At the same time, through the arc groove on the moving contact, the current flows along the direction of the arc groove. At this time, the current in the arc groove is like a energized solenoid coil generating a longitudinal magnetic field to form a spiral arc, which forms a flow circuit with the memory metal sheet. When the point contact concentrated arc contacts and flows with the memory metal sheet, the current passes through the memory metal sheet to make the electromagnetic slide rod generate magnetism, so that the viscosity of the magnetorheological fluid changes under the action of the electromagnetic field, so as to stably keep the telescopic rod extended, keep the memory metal sheet bent, and then make the arc flow into the side of the static contact and the moving contact through the memory metal sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall back structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the connection structure between the opening and closing lifting rod and the fixed bracket in the present invention;

[0025] Figure 4 It is a partial structural schematic diagram of the static contact and the moving contact in the present invention;

[0026] Figure 5 It is a schematic diagram of the connection structure of the static voltage rod and the dynamic voltage rod in the present invention;

[0027] Figure 6 Schematic diagram of the internal structure of the vacuum arc extinguishing tube in the present invention;

[0028] Figure 7 It is a schematic diagram of a partial structural cross section of the vacuum arc-extinguishing tube in the present invention;

[0029] Figure 8 It is a schematic diagram of the installation structure of the fixing rod in the present invention;

[0030] Fig. 9 It is a schematic diagram of the connection structure of the limiting slide plate in the present invention;

[0031] Fig.10 It is a partial structural schematic diagram of the inert gas tank in the present invention;

[0032] Fig.11 It is a schematic diagram of the partial structure of the memory metal sheet in the present invention;

[0033] Fig.12 It is a schematic diagram of the local structure of the extruded plate in the present invention;

[0034] Fig.13 It is a schematic diagram of the connection structure between the corrugated square tube and the dial plate in the present invention;

[0035] Fig.14 It is a schematic diagram of the closing circuit of the static contact and the moving contact in the present invention;

[0036] Fig.15 It is a schematic diagram of the connection structure between the paddle plate and the paddle in the present invention;

[0037] Fig.16 For the present invention Fig.12 A schematic diagram of the enlarged local structure at A;

[0038] Fig.17 For the present invention Fig.13 An enlarged schematic diagram of the local structure at location B.

[0039] In the figure: 1. operating mechanism box; 2. spring operating mechanism; 3. electric control mechanism; 4. mounting stand; 5. insulating baffle; 6. fixed partition; 7. fixed bracket; 8. vacuum arc extinguishing tube; 801. inert gas tank; 8011. slide plate; 8012. nozzle; 8013. opening and closing slide; 802. limit slide plate; 8021. memory metal sheet; 8022. corrugated conduit; 8023. telescopic rod; 8024. electromagnetic slide rod; 803. Extrusion plate; 8031, corrugated square tube; 8032, paddle plate; 8033, spring member; 8034, paddle; 8035, bead slot; 8036, slot; 804, fixed support plate; 805, fixed rod; 9, insulating bracket; 10, power board; 11, opening and closing lifting rod; 12, fixed support rod; 13, static voltage rod; 1301, static contact; 14, dynamic voltage rod; 1401, connecting shaft; 1402, dynamic contact; 1403, paddle rod. DETAILED DESCRIPTION

[0040] 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.

[0041] See also Figures 1 to 17 The present invention provides a technical solution for an efficient test device for a high-voltage circuit breaker:

[0042] A high-efficiency test device for a high-voltage circuit breaker comprises an operating mechanism box 1 and a spring operating mechanism 2 which is movably mounted in the operating mechanism box 1, and an electric control mechanism 3 which is fixedly mounted below the operating mechanism box 1 and is transmission-connected to the spring operating mechanism 2. A mounting stand 4 is fixedly mounted on one side of the operating mechanism box 1 and the electric control mechanism 3, and a vacuum arc extinguishing tube 8 is arranged above the mounting stand 4. A static contact 1301 is arranged above the inner side of the vacuum arc extinguishing tube 8, and a moving contact 1402 is arranged below the static contact 1301. Fixed rods 805 are fixedly mounted around the inner side of the vacuum arc extinguishing tube 8 at equal intervals. Fixed support plates 804 are fixedly mounted between and below the fixed rods 805, and an air passage is penetrated on one side of the fixed support plates 804. Extrusion plates 803 are arranged above the fixed support plates 804, and the extrusion plates 803 are mounted in an inward manner on the inner side of the fixed rods 805.

[0043] As an embodiment of the present invention, Figures 1 to 7As shown, the static contact 1301 is fixedly installed below the static voltage rod 13, the moving contact 1402 is fixedly installed above the dynamic voltage rod 14, a lever 1403 is provided below the moving contact 1402, and the lever 1403 is fixedly installed above the dynamic voltage rod 14 at an equal distance, a disc-shaped groove is provided in the middle of the surface of the static contact 1301 and the moving contact 1402, and arc grooves are provided on the static contact 1301 and the moving contact 1402 at equal distances;

[0044] During operation, the static contact 1301 and the moving contact 1402 are installed and used respectively through the static voltage rod 13 and the dynamic voltage rod 14. A disc-shaped groove is provided in the middle of the surface of the static contact 1301 and the moving contact 1402. When the static contact 1301 and the moving contact 1402 are fitted together, the high-voltage current flows through the disc-shaped groove to form a U-shaped ring circuit, so that the current flows radially toward the edge to avoid the concentrated flow of direct current and local overheating, so as to improve the service life of the contact. At the same time, through the arc groove on the moving contact 1402, the current flows along the direction of the arc groove. At this time, the current in the arc groove is like a powered solenoid coil generating a longitudinal magnetic field to form a spiral arc, which forms a flow circuit with the memory metal sheet 8021. Secondly, the fixed support plate 804 and the extrusion plate 803 are installed through the fixing rod 805, so that the extrusion plate 803 and the fixed support plate 804 fit tightly to ensure the airtightness and air permeability of the air duct.

[0045] As an embodiment of the present invention, Figures 1 to 4 As shown, a fixed partition 6 is fixedly installed on one side of the operating mechanism box 1, and a plurality of insulating baffles 5 are fixedly installed on one side of the fixed partition 6, a fixed bracket 7 is provided between the insulating baffles 5, and the fixed bracket 7 is fixedly installed on the fixed partition 6, an opening and closing lifting rod 11 is provided below the fixed partition 6, and the opening and closing lifting rod 11 is movably connected to the operating mechanism box 1 through the inner side of the fixed partition 6, an insulating bracket 9 is fixedly installed on one side above the mounting stand 4, a fixed support rod 12 is movably installed on the inner side of the insulating bracket 9, and the opening and closing lifting rod 11 and the fixed support rod 12 are movably connected in an embossing manner;

[0046] A dynamic voltage rod 14 is movably mounted on the inner side of the opening and closing lifting rod 11, a connecting shaft 1401 is movably mounted below the dynamic voltage rod 14, and the dynamic voltage rod 14 is movably connected to the opening and closing lifting rod 11 through the connecting shaft 1401, a static voltage rod 13 is fixedly mounted below the fixed bracket 7, and a power board 10 is fixedly mounted on both the static voltage rod 13 and the dynamic voltage rod 14;

[0047] During operation, since the spring operating mechanism 2 and the electric control operating mechanism 3 are respectively installed on the inner side and the lower side of the operating mechanism box 1, when closing the circuit breaker, the spring operating mechanism 2 is manually operated, and the connecting rod, the main shaft and the insulating pull rod and other transmission parts on the spring operating mechanism 2 are used to control the tripping, closing and maintaining the closed state of the circuit breaker. It is a method of generating a strong operating function in a short time by pre-storing the energy in the closing spring to realize the opening and closing operation of the circuit breaker. The spring operating mechanism 2 is an existing and mature technical means, which is known to those skilled in the art. The electric control mechanism 3 is used to control the spring operating mechanism 2 to control the tripping, closing and maintaining of the circuit breaker. It is a method of generating a strong operating function in a short time by pre-storing the energy in the closing spring to realize the opening and closing operation of the circuit breaker. Mechanism 3 is an existing and mature technical means, which is common knowledge for those skilled in the art and will not be described in detail here. It realizes the closing of the moving contact 1402 and the static contact 1301 through the transmission parts such as the main shaft connecting rod. When the opening and closing lifting rod 11 lifts the moving voltage rod 14 to achieve closing, since the insulating bracket 9 is fixedly installed on the mounting frame 4, the fixed support rod 12 is embedded in the insulating bracket 9 and is movably connected with the opening and closing lifting rod 11, and the moving voltage rod 14 is movably connected with the opening and closing lifting rod 11 through the connecting shaft 1401. When the opening and closing lifting rod 11 is lifted, the moving voltage rod 14 is movably connected. When moving, the fixed support rod 12 will serve as a fulcrum, so that the dynamic voltage rod 14 will rise and operate along with the opening and closing lifting rod 11, thereby pushing the moving contact 1402 to move upward and fit with the static contact 1301 to form a closed circuit to complete the closing. Secondly, the fixed partition 6 is installed on one side of the operating mechanism box 1, and the insulating baffle 5 and the fixed bracket 7 are installed and used through the fixed partition 6, and then the static voltage rod 13 is fixedly installed through the fixed bracket 7 to install and use the vacuum arc extinguishing tube 8, and the circuit connection is achieved by installing the power board 10 on the static voltage rod 13 and the dynamic voltage rod 14.

[0048] As an embodiment of the present invention, Figures 8 to 17As shown, a corrugated square tube 8031 ​​is movably mounted on the inner side of the extrusion plate 803, a dial plate 8032 is fitted below the corrugated square tube 8031, and the dial plate 8032 is movably mounted on the inner side of the extrusion plate 803, spring members 8033 are fixedly mounted on both sides of the inner side of the dial plate 8032, a dial piece 8034 is fixedly mounted on one side of the spring member 8033, and the dial piece 8034 is mounted in the dial plate 8032, and a clamping groove 8036 is provided on both sides of the dial piece 8034;

[0049] A vent hole is provided on the inner side of the paddle plate 8032, and the vent hole is connected through the limit slide plate 802 and the vent on the fixed support plate 804. A bead slot 8035 is fixedly installed on the inner side of the paddle plate 8032. A spring bead is provided on the inner side of the bead slot 8035, and the spring bead is engaged with the slot 8036 for movable connection. The spring bead is engaged with the slot 8036 for movable connection. A magnetorheological fluid is provided in the corrugated square tube 8031, and the magnetorheological fluid is connected and filled in series with the slide plate 8011, the telescopic rod 8023 and the corrugated square tube 8031 ​​through the corrugated conduit 8022;

[0050] During operation, since the air through hole on one side of the paddle 8034 is a three-way setting and is connected to the card slot 8036, and the spring card bead in the card bead slot 8035 is sucked by the negative pressure to fit in the card slot 8036 to engage the paddle 8034, when the external air enters the arc extinguishing chamber to destroy the vacuum, the air enters from the joint between the driven voltage rod 14 and the vacuum arc extinguishing tube 8. At this time, the negative pressure in the vacuum arc extinguishing tube 8 is reduced, and the incoming air enters the paddle 8032 from the air duct on the fixed support plate 804 through the extrusion plate 803 and the air through hole. The suction force of the paddle plate 8032 on the air through hole in the paddle piece 8034 is reduced, so that the tension spring in the bead slot 8035 pulls the spring bead back to cancel the engagement with the slot 8036. The paddle piece 8034 is elastically stretched by the spring member 8033, so that the paddle piece 8034 extends a certain distance in the paddle plate 8032, and then the lower side of the paddle piece 8034 contacts the paddle rod 1403 when the dynamic voltage rod 14 is closed and raised. Therefore, when the dynamic voltage rod 14 is closed and raised, the paddle plate 8032 is driven to press the plate 8032 through the contact between the paddle rod 1403 and the paddle piece 8034. 803, when the dial plate 8032 slides upward in the extrusion plate 803, the dial plate 8032 and the limit slide plate 802 are used to squeeze the corrugated square tube 8031 ​​in the extrusion plate 803, and then the magnetorheological fluid in the corrugated square tube 8031 ​​is squeezed into the telescopic rod 8023 through the corrugated conduit 8022 filled with magnetorheological fluid, so that the telescopic rod 8023 is extended to bend the memory metal sheet 8021. At this time, the distance between the bent and deformed memory metal sheet 8021 and the static contact 1301 and the moving contact 1402 is smaller than that between the static contact 1301 and the moving contact 1402. At the distance between the static contact 1301 and the moving contact 1402, when the vacuum is broken, the point-contact spirally focused arc with irregular movement is generated between the static contact 1301 and the moving contact 1402, and contacts and flows with the memory metal sheet 8021 respectively. At this time, the arc flows into the sides of the static contact 1301 and the moving contact 1402 through the memory metal sheet 8021 to prevent the arc from forming a point-contact focused arc on the surface of the static contact 1301 and the moving contact 1402 to produce a molten pit, thereby avoiding the arc from forming a focused arc column in the molten pit.

[0051] As an embodiment of the present invention, Figures 7 to 11 As shown, a limiting slide plate 802 is provided above the extrusion plate 803, and the limiting slide plates 802 are all embedded and installed on the inner side of the fixed rod 805, a memory metal sheet 8021 is embedded and movably installed below one side of the limiting slide plate 802, and the thickness of the memory metal sheet 8021 is set to decrease in sequence on the limiting slide plate 802, and electromagnetic slide bars 8024 are fixedly installed at the four corners of one side of the memory metal sheet 8021, and the electromagnetic slide bars 8024 are all embedded and movably installed on the inner side of the limiting slide plate 802, and a telescopic rod 8023 is provided in the middle of the electromagnetic slide bar 8024, and one side of the telescopic rod 8023 is fixedly installed on the inner side of the limiting slide plate 802, and the other side is arranged to fit with one side of the electromagnetic slide bar 8024;

[0052] During operation, when the point-contact concentrated arc contacts and flows with the memory metal sheet 8021, the current passes through the memory metal sheet 8021 to make the electromagnetic slide bar 8024 generate magnetism, so that the viscosity of the magnetorheological fluid changes under the action of the electromagnetic field, so as to stably bend the extended telescopic rod 8023 to the memory metal sheet 8021. When the static contact 1301 and the moving contact 1402 are closed and fitted, the resistance of the two is small, and the current passes through the static contact 1301 and the moving contact 1402 and no longer forms an arc. 21. Subsequently, after the memory metal sheet 8021 loses the action of current, the heat generated by the current arc under the resistance of the memory metal sheet 8021 will gradually cool down, and the memory metal sheet 8021 will gradually return to its initial state. At the same time, the electromagnetic slide bar 8024 no longer generates magnetism, and then the magnetorheological fluid in the telescopic rod 8023 is hydraulically returned to the corrugated conduit 8022, so that the paddle 8034 always keeps in contact with the paddle 1403 after closing the switch, and then presses the magnetorheological fluid in the corrugated conduit 8022 back to flow into the slide plate 8011 through the corrugated conduit 8022.

[0053] As an embodiment of the present invention, Figures 6 to 10 As shown, an inert gas tank 801 is provided above the limiting slide plate 802, and the inert gas tank 801 is fixedly installed above the inside of the vacuum arc extinguishing tube 8, a slide plate 8011 is fixedly installed on one side of the inert gas tank 801, and an opening and closing slide plate 8013 is movably installed in the slide plate 8011, a nozzle 8012 is installed through the middle of the slide plate 8011, and one side of the opening and closing slide plate 8013 is attached to the inner side of the nozzle 8012, and a corrugated conduit 8022 is connected through one side of the slide plate 8011, and the corrugated conduit 8022 is installed in an embedded manner on the inner side of the limiting slide plate 802;

[0054] During operation, when the magnetorheological fluid flows into the slide plate 8011 through the corrugated conduit 8022, the magnetorheological fluid pushes the opening and closing slide 8013 in the slide plate 8011 to slide, so that the opening on the opening and closing slide 8013 corresponds to the nozzle 8012, and then the inert gas in the inert gas tank 801 (this inert gas is an inert gas used for fire extinguishing, which may include but is not limited to nitrogen, carbon dioxide, argon and other inert gases) is ejected. At this time, the inert gas ejected from the inert gas tank 801 will fill the vacuum arc extinguishing tube 8 to prevent the generation of arcs during the opening and closing experiment. Secondly, the inert gas in the inert gas tank 801 is a colored gas. When filling After filling the vacuum arc extinguishing tube 8, colored inert gas is ejected from the joint between the driven voltage rod 14 and the vacuum arc extinguishing tube 8, forming an obvious visual warning and judging the approximate area of ​​poor airtightness for timely inspection and repair by maintenance personnel. At the same time, since the thickness of the memory metal sheet 8021 decreases successively, there is a time difference when the memory metal sheet 8021 is completely restored to its initial state, so that the inert gas ejected from the inert gas tank 801 is a continuous process, so as to avoid the inert gas in the inert gas tank 801 being ejected at the same time to cause the air pressure in the vacuum arc extinguishing tube 8 to be too high, resulting in a sudden increase in the internal pressure of the vacuum arc extinguishing tube 8 in the arc extinguishing chamber, affecting the safe operation of the equipment.

[0055] Working principle: Driven by the rotation of the gear plate on the moving main shaft, the main shaft transmits power to the connecting rod and other transmission parts, thereby realizing the closing action of the moving contact 1402 and the static contact 1301. When the opening and closing lifting rod 11 lifts the moving voltage rod 14 to complete the closing, the fixed support rod 12 serves as a fulcrum, so that the moving voltage rod 14 rises with the lifting of the opening and closing lifting rod 11, pushing the moving contact 1402 to move upward and fit with the static contact 1301 to form a closed circuit to complete the closing. Then, the fixed partition 6 is installed on one side of the operating mechanism box 1, and the insulating baffle 5 and the fixed bracket 7 are installed and used through the fixed partition 6, and then the static voltage rod 13 is fixedly installed through the fixed bracket 7 to facilitate the installation and use of the vacuum arc extinguishing tube 8. By connecting the power board 10 Installed on the static voltage rod 13 and the dynamic voltage rod 14 to achieve circuit connection. The static voltage rod 13 and the dynamic voltage rod 14 are used to install the static contact 1301 and the dynamic contact 1402 respectively. There is a disc-shaped groove in the middle of their surfaces. When the switch is closed, the static contact 1301 and the dynamic contact 1402 fit together, and the high-voltage current flows through the disc-shaped groove to form a U-shaped ring circuit. The current moves radially toward the edge to avoid the current directly flowing through and causing local overheating, thereby improving the service life of the contact. At the same time, the arc groove on the dynamic contact 1402 guides the current to flow along the arc groove direction. The current generates a longitudinal magnetic field in the arc groove to form a spiral arc, forming a flow circuit with the memory metal sheet 8021. In addition, the fixed support plate 804 and the extrusion plate 803 are installed through the fixed rod 805;

[0056] When external air enters the arc extinguishing chamber and destroys the vacuum, air enters from the joint between the driven voltage rod 14 and the vacuum arc extinguishing tube 8, causing the negative pressure in the vacuum arc extinguishing tube 8 to decrease, and the air passes through the air duct on the fixed support plate 804, the extrusion plate 803 and the air through hole into the paddle plate 8032. At this time, the suction force of the negative pressure on the air through hole in the paddle 8034 is reduced, so that the tension spring in the bead slot 8035 pulls the spring bead back, canceling the engagement with the slot 8036, and the paddle 8034 extends a certain distance in the paddle plate 8032 through the elastic extension of the spring member 8033. When the driven voltage rod 14 closes and rises, the paddle rod 1403 contacts the paddle 8034, driving the paddle plate 8032 to squeeze The pressing plate 803 slides upward, and when the dial plate 8032 slides upward in the extrusion plate 803, the corrugated square tube 8031 ​​in the extrusion plate 803 is squeezed by the dial plate 8032 and the limit slide plate 802, and the magnetorheological fluid in the corrugated square tube 8031 ​​is squeezed into the telescopic rod 8023, so that the telescopic rod 8023 is extended and the deformation memory metal sheet 8021 is bent. At this time, the distance between the bent memory metal sheet 8021 and the static contact 1301 and the moving contact 1402 is smaller than the distance between them. When the vacuum is broken, the point contact spiral concentrated arc with irregular movement is generated between the static contact 1301 and the moving contact 1402, and contacts and circulates with the memory metal sheet 8021 respectively;

[0057] When the point-contact concentrated arc contacts and flows with the memory metal sheet 8021, the current passes through the memory metal sheet 8021 to make the electromagnetic slide bar 8024 generate magnetism, so that the viscosity of the magnetorheological fluid changes under the action of the electromagnetic field, so as to stably keep the telescopic rod 8023 extended and keep the memory metal sheet 8021 bent. When the static contact 1301 and the moving contact 1402 are closed and fitted, the resistance of the two is small, and the current passes through the static contact 1301 and the moving contact 1402 and no longer forms an arc and flows through the memory metal sheet 8021. After that, after the memory metal sheet 8021 loses the action of the current, the heat generated by the current arc under the resistance of the memory metal sheet 8021 gradually cools down, and the memory metal sheet 8021 gradually returns to the initial state. At the same time, the electromagnetic slide bar 8024 no longer generates magnetism, and then the magnetorheological fluid in the telescopic rod 8023 is hydraulically pressed back into the corrugated conduit 8022. The paddle 8034 always keeps in contact with the paddle 1403 after closing the switch, and then the magnetorheological fluid in the corrugated conduit 8022 is pressed back into the slide plate 8011 through the corrugated conduit 8022.

[0058] When the magnetorheological fluid flows into the slide plate 8011 through the corrugated conduit 8022, the magnetorheological fluid pushes the opening and closing slide 8013 in the slide plate 8011 to slide, so that the opening on the opening and closing slide 8013 corresponds to the nozzle 8012, and then the inert gas in the inert gas tank 801 is sprayed out. The inert gas sprayed from the inert gas tank 801 will fill the vacuum arc extinguishing tube 8 to prevent arcing during the opening and closing experiment. The inert gas in the inert gas tank 801 is a colored gas. After filling the vacuum arc extinguishing tube 8, the colored The inert gas is ejected from the joint between the driven voltage rod 14 and the vacuum arc extinguishing tube 8, forming an obvious visual warning and judging the approximate area of ​​poor airtightness for timely inspection and repair by maintenance personnel. There is a time difference for the memory metal sheet 8021 to fully recover to its initial state, so that the inert gas ejected from the inert gas tank 801 is a continuous process, so as to avoid the inert gas in the inert gas tank 801 being ejected at the same time, causing the air pressure in the vacuum arc extinguishing tube 8 to be too high, resulting in a sudden increase in the internal pressure of the vacuum arc extinguishing tube 8 in the arc extinguishing chamber, affecting the safe operation of the equipment.

[0059] 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. An efficient test device for a high-voltage circuit breaker, comprising an operating mechanism box (1) and a spring operating mechanism (2) movably mounted in the operating mechanism box (1), and an electric control mechanism (3) fixedly mounted below the operating mechanism box (1) and transmission-connected to the spring operating mechanism (2), a mounting stand (4) fixedly mounted on one side of the operating mechanism box (1) and the electric control mechanism (3), and a vacuum arc extinguishing tube (8) is arranged above the mounting stand (4), characterized in that: A static contact (1301) is provided on the upper inner side of the vacuum arc extinguishing tube (8), and a moving contact (1402) is provided below the static contact (1301); fixed rods (805) are equidistantly fixedly installed around the inner side of the vacuum arc extinguishing tube (8); fixed support plates (804) are fixedly installed below the fixed rods (805), and an air passage is provided through one side of the fixed support plates (804); an extrusion plate (803) is provided above the fixed support plates (804), and the extrusion plates (803) are installed on the inner side of the fixed rods (805); The inner side of the extrusion plate (803) is movably mounted with a corrugated square tube (8031), a dial plate (8032) is fitted below the corrugated square tube (8031), and the dial plate (8032) is movably mounted on the inner side of the extrusion plate (803), spring members (8033) are fixedly mounted on both sides of the inner side of the dial plate (8032), a dial piece (8034) is fixedly mounted on one side of the spring member (8033), and the dial piece (8034) is mounted in the dial plate (8032), and a clamping groove (8036) is provided on both sides of the dial piece (8034); A limiting slide plate (802) is provided above the extrusion plate (803), and the limiting slide plate (802) is embedded and installed on the inner side of the fixed rod (805); a memory metal sheet (8021) is embedded and movably installed below one side of the limiting slide plate (802), and the thickness of the memory metal sheet (8021) is set to decrease in sequence on the limiting slide plate (802); electromagnetic slide bars (8024) are fixedly installed at the four corners of one side of the memory metal sheet (8021), and the electromagnetic slide bars (8024) are embedded and movably installed on the inner side of the limiting slide plate (802); a telescopic rod (8023) is provided in the middle of the electromagnetic slide bar (8024), and one side of the telescopic rod (8023) is fixedly installed on the inner side of the limiting slide plate (802), and the other side is arranged to fit with one side of the electromagnetic slide bar (8024).

2. The high-efficiency test device for high-voltage circuit breaker according to claim 1, characterized in that: An inert gas tank (801) is provided above the limiting slide plate (802), and the inert gas tank (801) is fixedly installed above the inside of the vacuum arc extinguishing tube (8), a slide plate (8011) is fixedly installed on one side of the inert gas tank (801), and an opening and closing slide plate (8013) is movably installed in the slide plate (8011).

3. The high-efficiency test device for high-voltage circuit breaker according to claim 2, characterized in that: A nozzle (8012) is installed through the middle of the slide plate (8011), and one side of the opening and closing slide (8013) is attached to the inner side of the nozzle (8012). A corrugated conduit (8022) is connected through one side of the slide plate (8011), and the corrugated conduit (8022) is installed in an embedded manner on the inner side of the limiting slide plate (802). Magnetorheological fluid is provided in the corrugated square tube (8031), and the magnetorheological fluid is connected in series with the slide plate (8011), the telescopic rod (8023) and the corrugated square tube (8031) through the corrugated conduit (8022) and is filled and arranged.

4. The high-efficiency test device for high-voltage circuit breaker according to claim 1, characterized in that: The inner side of the shift plate (8032) is provided with a vent hole, and the vent hole is arranged through the limiting slide plate (802) and the vent passage on the fixed support plate (804); the inner side of the shift plate (8032) is fixedly installed with a bead slot (8035); the inner side of the bead slot (8035) is provided with a spring bead, and the spring bead is movably connected to the slot (8036) in an engaging manner.

5. The high-efficiency test device for high-voltage circuit breaker according to claim 1, characterized in that: A fixed partition (6) is fixedly mounted on one side of the operating mechanism box (1), and a plurality of insulating baffles (5) are fixedly mounted on one side of the fixed partition (6); a fixed bracket (7) is provided between the insulating baffles (5), and the fixed bracket (7) is fixedly mounted on the fixed partition (6).

6. The high-efficiency test device for high-voltage circuit breaker according to claim 5, characterized in that: An opening and closing lifting rod (11) is provided below the fixed partition (6), and the opening and closing lifting rod (11) is movably connected to the operating mechanism box (1) through the inner side of the fixed partition (6). An insulating bracket (9) is fixedly installed on one side above the mounting frame (4), and a fixed support rod (12) is movably installed on the inner side of the insulating bracket (9), and the opening and closing lifting rod (11) and the fixed support rod (12) are movably connected in a movably engaged manner.

7. The high-efficiency test device for high-voltage circuit breaker according to claim 6, characterized in that: A dynamic voltage rod (14) is movably mounted on the inner side of the opening and closing lifting rod (11), a connecting shaft (1401) is movably mounted on the lower side of the dynamic voltage rod (14), and the dynamic voltage rod (14) is movably connected to the opening and closing lifting rod (11) through the connecting shaft (1401), a static voltage rod (13) is fixedly mounted on the lower side of the fixed bracket (7), and a power connection plate (10) is fixedly mounted on both the static voltage rod (13) and the dynamic voltage rod (14).

8. The high-efficiency test device for high-voltage circuit breaker according to claim 1, characterized in that: The static contact (1301) is fixedly installed below the static voltage rod (13), the moving contact (1402) is fixedly installed above the moving voltage rod (14), a shifting rod (1403) is provided below the moving contact (1402), and the shifting rod (1403) is fixedly installed above the moving voltage rod (14) at an equal distance.

9. The high-efficiency test device for high-voltage circuit breaker according to claim 8, characterized in that: A disc-shaped groove is provided in the middle of the surface of the stationary contact (1301) and the moving contact (1402), and arc grooves are provided on the stationary contact (1301) and the moving contact (1402) at equal intervals and in a surrounding manner.

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