Load switch and ring main unit thereof

Abstract

The invention relates to the technical field of load switches, in particular to a load switch and a ring main unit thereof, the load switch comprises a cabinet body, a cabinet door, a support frame, a sleeve, a static contact and a moving contact, the cabinet door is hinged to the cabinet body, the support frame is fixedly connected with the inner wall of a shell, both the sleeve and the static contact are fixedly connected with the support frame, and a control rod is further hinged to the support frame; the movable contact is slidably connected to the sleeve, one end of the movable contact is hinged to the control rod, a spray head is fixedly installed in the sleeve, and a plurality of first cleaning pipelines and second cleaning pipelines are arranged in the spray head. The cleaning assembly cleans carbon deposits on the surfaces of the moving contact and the static contact, and the problems that the contacts are powered off due to carbon deposits on the contacts, an electric appliance cannot work normally, and the service life of the electric appliance is shortened are solved.

Description

Technical Field

[0001] The invention relates to the technical field of load switches, in particular to a load switch and a ring network cabinet thereof. Background Art

[0002] A load switch is a device used to control the circuit connection switch. It has a simple arc extinguishing device and is between the circuit breaker and the isolating switch. The main function of the load switch is to shut off the circuit under load current. It can switch on and off a certain load current and overload current.

[0003] During long-term use, the load switch causes frequent switching on and off, which causes contact wear and oxidation, thereby forming carbon deposits. The carbon deposits on the contacts can cause power failure, electrical appliances not to work properly, and shortened electrical life. In addition, the water in the air mixes in, causing the carbon deposits inside to connect together and cause a local short circuit. The problem of carbon deposits in the load switch can only be solved by regular cleaning by staff. However, due to the complex internal structure and small space of the ring network cabinet, it is difficult for staff to clean the load switch installed inside the ring network cabinet.

[0004] In response to the above problems, the prior art provides some solutions. For example, patent application number: CN202321411680.7 provides a low-voltage load switch purging device for a power distribution system of a nuclear power plant, including a dust removal table for placing the low-voltage load switch. The dust removal table is provided with holes for impurities cleaned from the low-voltage load switch to leak downward. An air gun blows air at the low-voltage load switch on the dust removal table to clean the impurities on the low-voltage load switch, and a filtering device is arranged on the lower side of the dust removal table to filter the cleaned impurities. This solution completes the cleaning work by blowing air at the low-voltage load switch with an air gun. This solution requires a purging device to be arranged outside the low-voltage load switch, which is not only costly but also occupies a large space. Summary of the invention

[0005] The object of the present invention is to provide a load switch and a ring network cabinet thereof, so as to solve the problem that carbon deposits will appear on the contacts of the load switch during long-term use, and the carbon deposits will cause the contacts to lose power, the electrical appliances to malfunction, and the life of the electrical appliances to be shortened, while it is difficult for the staff to clean the load switch installed inside the ring network cabinet.

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

[0007] A load switch, comprising a support frame, a sleeve, a static contact and a moving contact, wherein the sleeve and the static contact are both fixedly connected to the support frame, a control rod is also hinged on the support frame, the moving contact is slidably connected to the sleeve and one end is hinged to the control rod, a nozzle is fixedly installed inside the sleeve, a plurality of cleaning pipes 1 and 2 are arranged inside the nozzle, the cleaning pipe 1 connects the outer side of the sleeve with the inner side of the sleeve, and the center line of the cleaning pipe 1 points to the lower surface of the static contact, and one end of the cleaning pipe 2 is connected to the cleaning pipe 1 The other end is connected to the outside of the sleeve, and the center line of the cleaning pipe 2 points to the upper surface of the moving contact. A piston and a gear are also provided inside the sleeve. A rack 1 is fixedly connected to the piston, and the gear is rotatably connected to the inside of the sleeve. The rack 1 is meshed with the gear. A rack 2 is fixedly installed on the moving contact, and the gear is meshed with the rack 2. A cleaning assembly is also provided on the nozzle. When the control rod drives the moving contact to move downward, the nozzle sprays airflow to push the cleaning assembly to contact the surfaces of the moving contact and the static contact.

[0008] It is easy to understand that when the load switch is disconnected, the moving contact moves downward away from the static contact, and the piston inside the sleeve compresses the gas inside the sleeve. At this time, the cleaning pipe 1 blows out an airflow, and the gas flows between the moving contact and the static contact. The arc generated between the moving contact and the static contact is blown out, and the moving contact continues to move downward, and the cleaning pipe 1 and the cleaning pipe 2 continue to spray airflow. At this time, the airflow pushes the cleaning component, so that the cleaning component contacts the surfaces of the moving contact and the static contact respectively, and the cleaning component cleans the carbon deposits on the surfaces of the moving contact and the static contact respectively. The design cleans the carbon deposits on the surfaces of the moving contact and the static contact by designing a cleaning component, thereby avoiding the problems of carbon deposits on the contacts causing power failure, electrical appliances not working properly, and shortened electrical appliance life. At the same time, it also saves the staff the step of cleaning the load switch. The design also saves costs by utilizing the airflow originally used for arc extinguishing to drive the cleaning component, without the need for additional power equipment.

[0009] Preferably, the cleaning assembly includes a cleaning block 1 and a cleaning block 2, and the nozzle is respectively provided with a plurality of grooves 1 and grooves 2, the number of grooves 1 and grooves 2 is half the number of cleaning pipes 1 and cleaning pipes 2, a plurality of grooves 1 are evenly distributed on the nozzle, and groove 1 is arranged at the outlet of cleaning pipe 1, a plurality of grooves 2 are evenly distributed on the nozzle, and groove 2 is arranged at the outlet of cleaning pipe 2, the cleaning block 1 is hinged at the upper end of groove 1, and the cleaning block 2 is hinged at the lower end of groove 2, and the cleaning block 1 and cleaning block 2 are respectively in contact with the static contact and the moving contact.

[0010] It is easy to understand that the design arranges cleaning block 1 and cleaning block 2 at intervals on cleaning pipe 1 and cleaning pipe 2. Cleaning pipe 1 with cleaning block 1 at the outlet may be affected by cleaning block 1, resulting in unstable airflow. However, since cleaning block 1 and cleaning block 2 are arranged at intervals, cleaning pipe 1 without cleaning block 1 at the outlet can still normally extinguish the arc generated between the static contact and the moving contact, avoiding the rotation of cleaning block 1 and thus affecting the intensity of the airflow ejected from cleaning pipe 1, thereby affecting the original arc extinguishing work of the load switch, thereby improving the reliability of the load switch.

[0011] Preferably, a buckle is hinged on the groove, and a torsion spring is provided on the buckle, and the torsion spring pushes the buckle to rotate toward the outer side of the groove. When the moving contact contacts the static contact, one side of the buckle contacts the moving contact, and the moving contact pushes the buckle to rotate into the groove, and the other side of the buckle contacts the cleaning block.

[0012] It is easy to understand that the design sets a buckle on the groove 1. When the moving contact and the static contact are closed, the buckle will press the passive contact. At this time, the buckle will lock the cleaning block 1. When the moving contact and the static contact are separated and move downward a certain distance, the moving contact will be separated from the buckle. At this time, the buckle will no longer lock the cleaning block 1. Therefore, the design makes it so that when the distance between the moving contact and the static contact is too close during the separation process, the cleaning block 1 will not perform the cleaning work. When the distance between the moving contact and the static contact is far enough, the cleaning block 1 will perform the cleaning work. The design processes the arc extinguishing work and the cleaning work of the load switch in sequence, avoiding the cleaning block 1 from cleaning the static contact when the load switch is arc extinguishing, thereby affecting the arc extinguishing effect of the load switch, and also avoiding the cleaning block 1 from being punctured by the arc. Therefore, the design improves the reliability of the load switch.

[0013] Preferably, a ventilation chamber is also provided inside the cleaning pipe one, a sliding plate is slidably connected to the inside of the sleeve, a sealing block is slidably connected to the ventilation chamber, a connecting rod is fixedly connected to the bottom of the sealing block, the connecting rod is fixedly connected to the sliding plate, the diameter of the sealing block is consistent with the diameter of the cleaning pipe one, the diameter of the connecting rod is smaller than the diameter of the cleaning pipe, a ventilation hole one is provided at the connection between the sliding plate and the connecting rod, a cleaning pipe three is also provided on the nozzle head, the cleaning pipe three connects the inside of the sleeve with the outside of the sleeve, the upper surface of the sliding plate is in contact with the lower surface of the nozzle, a spring is provided between the bottom of the sliding plate and the inner wall of the sleeve, a plurality of ventilation grooves are provided on the nozzle head, an extrusion block one is fixedly installed on the moving contact, the extrusion block one is slidably connected to the inside of the ventilation groove, and the surface of the extrusion block one is in contact with the inner wall of the ventilation groove, and when the moving contact moves downward, the extrusion block one contacts the sliding plate.

[0014] It is easy to understand that this design allows the carbon deposited dust to detach from the surfaces of the moving contact and the static contact after cleaning block 1 and cleaning block 2 complete the cleaning of the static contact and the moving contact, and the moving contact continues to move downward. At this time, the extrusion block 1 on the moving contact will push the sliding plate, and the sliding plate will block the cleaning pipe 1, and connect the cleaning pipe 3. At this time, the cleaning pipe 1 and the cleaning pipe 2 cannot blow out the airflow. At this time, the airflow in the ventilation groove and the cleaning pipe 3 flows upward and blows the carbon deposited dust upward to keep the carbon deposited dust away from the moving contact and the static contact. Therefore, this design allows the carbon deposited dust to be blown away after each cleaning, avoiding the carbon deposited dust that has not been blown away from adhering to the moving contact and the static contact again, thereby improving the cleaning effect.

[0015] Preferably, the cleaning block one and the cleaning block two are both made of flexible materials, and friction protrusions are provided on the cleaning block one and the cleaning block two. The friction protrusion on the cleaning block one contacts the static contact, and the friction protrusion on the cleaning block two contacts the moving contact. Vent hole two is also provided on the cleaning block one and the cleaning block two.

[0016] It is easy to understand that the design sets friction protrusions on cleaning block one and cleaning block two, which enables the friction protrusions to better rub and scrape the surfaces of the moving contact and the static contact when cleaning block one and cleaning block two, thereby improving the cleaning effect, and cleaning block one and cleaning block two are also provided with vent hole two. When the airflow acts on vent hole two, since cleaning block one and cleaning block two are made of flexible materials, the airflow will squeeze the inner wall of vent hole two to cause cleaning block one and cleaning block two to deform and vibrate, which enables the friction protrusions on cleaning block one and cleaning block two to better contact with the moving contact and the static contact, and the vibration can also enable the friction protrusions on cleaning block one and cleaning block two to continuously hit the surfaces of the moving contact and the static contact, which enables cleaning block one and cleaning block two to better clean the surfaces of the moving contact and the static contact, thereby further improving the cleaning effect.

[0017] Preferably, the length of the sealing block inside the cleaning pipe 1 provided with the groove 1 is consistent with the thickness of the bottom surface of the ventilation chamber, and the length of the sealing block inside the cleaning pipe 1 not provided with the groove 1 is greater than the thickness of the bottom surface of the ventilation chamber. The moving contact is also provided with an extrusion block 2, and the extrusion block 2 is in contact with the lower surface of the sliding plate.

[0018] It is easy to understand that this design makes it possible for the extrusion block 2 on the moving contact to squeeze the lower surface of the sliding plate during the closing process of the moving contact with the static contact, so that the sliding plate can move upward quickly. At this time, the length of the blocking block is greater than the thickness of the bottom surface of the ventilation chamber, and the gas inside is compressed. The cleaning pipe 1 without a groove 1 sprays air flow, and the air flow further cleans the carbon deposits on the moving contact, avoiding the carbon deposits and dust floating in the air from being sandwiched between the static contact and the moving contact during the closing process. This design improves the reliability of the equipment.

[0019] Preferably, when the cleaning block 1 contacts the static contact, the angle between the cleaning block 1 and the moving contact is A, and A≥90°; when the cleaning block 2 contacts the moving contact, the angle between the cleaning block 2 and the inner wall of the nozzle is B, and B≥90°.

[0020] It is easy to understand that the smaller the angle between cleaning block 1 and the moving contact and the angle between cleaning block 2 and the inner wall of the nozzle are, the closer the angle between the airflow blowing out of cleaning pipe 1 and cleaning block 1 and cleaning block 2 is to 90°. When the airflow blows cleaning block 1 and cleaning block 2 at an angle close to 90°, the airflow can act on cleaning block 1 and cleaning block 2 at a better angle, so that the pressure on cleaning block 1 and cleaning block 2 is greater, thereby enabling cleaning block 1 and cleaning block 2 to have better friction. This design sets the angle of cleaning block 1 and cleaning block 2 during cleaning so that cleaning block 1 and cleaning block 2 are better affected by the pressure from the airflow, thereby improving the cleaning effect of the cleaning blocks.

[0021] Preferably, a ring network cabinet using the above-mentioned load switch includes a cabinet body and a cabinet door, the cabinet door is hinged on the cabinet body, the support frame is fixedly connected to the inner wall of the outer shell, a fixing rod is fixedly connected to the inside of the ring network cabinet, a collecting bin is slidably connected to the fixing rod, the interior of the collecting bin is three-way connected with the cleaning pipe, and the upper surface of the interior of the collecting bin is provided with an arc surface.

[0022] It is easy to understand that when the cleaning pipe three blows up the carbon deposited dust, the cleaning pipe three will also blow up the collecting bin. At this time, the surface of the collecting bin is in contact with the static contact to form a sealed space. At this time, the carbon deposited dust will follow the airflow to the inside of the collecting bin, and when there is no airflow blowing out of the cleaning pipe three, the collecting bin will fall due to its own weight. At this time, the internal nozzle can be connected to the outside so that the piston can suck the gas into the sleeve. The design enables the carbon deposited dust to be collected by designing the collecting bin, thereby avoiding the blown carbon deposited dust affecting the operation of other equipment inside the ring network cabinet, and the collected carbon deposited dust is more convenient for workers to clean, and the arc surface set on the upper surface of the collecting bin can enable the carbon deposited dust to enter the collection bin along the arc surface, thereby improving the reliability of the equipment.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention arranges a cleaning component on the load switch. When the moving contact moves downward away from the static contact, the cleaning pipe 1 and the cleaning pipe 2 eject airflow, and the airflow pushes the cleaning component, so that the cleaning component contacts the surfaces of the moving contact and the static contact respectively, and the cleaning component cleans the carbon deposits on the surfaces of the moving contact and the static contact respectively. This design utilizes the airflow originally used for arc extinguishing to drive the cleaning component to clean the carbon deposits on the surfaces of the moving contact and the static contact, thereby avoiding the problems of contact power failure, electrical failure, shortened electrical life, etc. caused by carbon deposits on the contacts, and also saves the cost of setting up additional power equipment.

[0025] 2. The present invention arranges a sliding plate inside the load switch so that after cleaning block 1 and cleaning block 2 complete the cleaning of the static contact and the moving contact, the carbon deposited dust separates from the surfaces of the moving contact and the static contact, and the moving contact continues to move downward. At this time, the extrusion block 1 on the moving contact pushes the sliding plate, and the sliding plate blocks the cleaning pipe 1, and connects the cleaning pipe 3. At this time, the airflow between the ventilation groove and the cleaning pipe 3 flows upward, and blows the carbon deposited dust upward, so that the carbon deposited dust is kept away from the moving contact and the static contact, avoiding the carbon deposited dust that has not been blown away from adhering to the moving contact and the static contact again, thereby improving the cleaning effect.

[0026] 3. The present invention sets a collecting bin inside the ring network cabinet. When the cleaning pipe three blows up the carbon deposited dust, the cleaning pipe three will blow up the collecting bin at the same time. At this time, the surface of the collecting bin is attached to the static contact to form a sealed space. The carbon deposited dust will follow the airflow to the inside of the collecting bin. The design enables the carbon deposited dust to be collected by designing the collecting bin, thereby avoiding the blown carbon deposited dust from affecting the operation of other equipment inside the ring network cabinet, and the collected carbon deposited dust is more convenient for workers to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the load switch and the ring network cabinet of the present invention;

[0028] Figure 2 for Figure 1 Sectional view at AA;

[0029] Figure 3 It is a structural schematic diagram of the load switch of the present invention;

[0030] Figure 4 for Figure 3 Sectional view at the middle BB;

[0031] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0032] Figure 6 for Figure 3 Sectional view at DD in the middle;

[0033] Figure 7 It is a structural schematic diagram of the nozzle of the present invention;

[0034] Figure 8 It is a schematic structural diagram of the moving contact of the present invention.

[0035] In the figure: 1. cabinet body; 2. cabinet door; 3. fixing rod; 4. collecting bin; 401. arc surface; 5. support frame; 6. sleeve; 601. nozzle; 602. cleaning pipe one; 603. cleaning pipe two; 604. piston; 605. gear; 606. rack one; 607. rack two; 608. cleaning block one; 609. cleaning block two; 610. groove one; 611. groove two; 612. buckle; 613. ventilation chamber; 614. sliding plate; 615. blocking block; 616. connecting rod; 617. vent hole one; 618. cleaning pipe three; 619. spring; 620. ventilation groove; 621. extrusion block one; 622. friction protrusion; 623. vent hole two; 624. extrusion block two; 7. static contact; 8. moving contact; 9. control rod. DETAILED DESCRIPTION

[0036] The present invention provides a load switch and a ring network cabinet thereof, and the technical solution is as follows:

[0037] See also Figures 3 to 6 A load switch includes a support frame 5, a sleeve 6, a static contact 7 and a moving contact 8. The sleeve 6 and the static contact 7 are fixedly connected to the support frame 5. A control rod 9 is also hinged on the support frame 5. The moving contact 8 is slidably connected to the sleeve 6 and one end is hinged to the control rod 9. A nozzle 601 is fixedly installed inside the sleeve 6. Six cleaning pipes 1 602 and cleaning pipes 2 603 are arranged inside the nozzle 601. The cleaning pipe 1 602 connects the outer side of the sleeve 6 with the inner side of the sleeve 6, and the center line of the cleaning pipe 1 602 points to the lower surface of the static contact 7. One end of the cleaning pipe 2 603 is connected to the cleaning pipe 1 602 and the other end is connected to the cleaning pipe 1 602. The end is connected with the outside of the sleeve 6, and the center line of the cleaning pipe 2 603 points to the upper surface of the moving contact 8. A piston 604 and a gear 605 are also provided inside the sleeve 6. A rack 1 606 is fixedly connected to the piston 604. The gear 605 is rotatably connected to the inside of the sleeve 6. The rack 1 606 is meshed with the gear 605. A rack 2 607 is fixedly installed on the moving contact 8. The gear 605 is meshed with the rack 2 607. A cleaning component is also provided on the nozzle 601. When the control rod 9 drives the moving contact 8 to move downward, when the nozzle 601 sprays airflow, the airflow pushes the cleaning component to contact the surfaces of the moving contact 8 and the static contact 7.

[0038] For further information, see Figures 3 to 8The cleaning assembly includes a cleaning block 1 608 and a cleaning block 2 609. The nozzle 601 is provided with three grooves 1 610 and groove 2 611 respectively. The number of grooves 1 610 and groove 2 611 is half the number of cleaning pipe 1 602 and cleaning pipe 2 603. The three grooves 1 610 are evenly distributed on the nozzle 601. The groove 1 610 is arranged at the outlet of the cleaning pipe 1 602. The three grooves 2 611 are evenly distributed on the nozzle 601. The groove 2 611 is arranged at the outlet of the cleaning pipe 2 603. The cleaning block The cleaning block 608 is hinged at the upper end of the groove 610, and the cleaning block 609 is hinged at the lower end of the groove 611. The cleaning block 608 and the cleaning block 609 are in contact with the static contact 7 and the moving contact 8 respectively. The cleaning block 608 and the cleaning block 609 are both made of flexible materials. The cleaning block 608 and the cleaning block 609 are both provided with friction protrusions 622. The friction protrusions 622 on the cleaning block 608 are in contact with the static contact 7, and the friction protrusions 622 on the cleaning block 609 are in contact with the moving contact 8. The cleaning block 608 and the cleaning block 2 are in contact with each other. A second vent hole 623 is also provided on 609. When the cleaning block 608 contacts the static contact 7, the angle between the cleaning block 608 and the moving contact 8 is A, and A is equal to 90°. When the cleaning block 609 contacts the moving contact 8, the angle between the cleaning block 609 and the inner wall of the nozzle 601 is B, and B is equal to 90°. A buckle 612 is hinged on the groove 610, and a torsion spring is provided on the buckle 612. The torsion spring pushes the buckle 612 to rotate toward the outer side of the groove 610. When the moving contact 8 contacts the static contact 7, the buckle 612 is hinged on the groove 610. One side contacts with the moving contact 8, and the moving contact 8 pushes the buckle 612 to rotate into the groove 610. The other side of the buckle 612 contacts with the cleaning block 608. The length of the blocking block 615 inside the cleaning pipe 602 with the groove 610 is consistent with the thickness of the bottom surface of the ventilation chamber 613. The length of the blocking block 615 inside the cleaning pipe 602 without the groove 610 is greater than the thickness of the bottom surface of the ventilation chamber 613. The moving contact 8 is also provided with an extrusion block 624, which contacts with the lower surface of the sliding plate 614.

[0039] See also Figures 3 to 8A ventilation chamber 613 is also provided inside the cleaning pipe 602, a sliding plate 614 is slidably connected inside the sleeve 6, a blocking block 615 is slidably connected inside the ventilation chamber 613, a connecting rod 616 is fixedly connected to the bottom of the blocking block 615, the connecting rod 616 is fixedly connected to the sliding plate 614, the diameter of the blocking block 615 is consistent with the diameter of the cleaning pipe 602, the diameter of the connecting rod 616 is smaller than the diameter of the cleaning pipe, a ventilation hole 617 is provided at the connection between the sliding plate 614 and the connecting rod 616, and a cleaning pipe is also provided on the nozzle 601 Three 618, cleaning pipe three 618 connects the inside of sleeve 6 with the outside of sleeve 6, the upper surface of sliding plate 614 fits with the lower surface of nozzle 601, a spring 619 is arranged between the bottom of sliding plate 614 and the inner wall of sleeve 6, six ventilation grooves 620 are opened on nozzle 601, and an extrusion block 621 is fixedly installed on the moving contact 8. Extrusion block 621 is slidably connected inside the ventilation groove 620, and the surface of extrusion block 621 fits with the inner wall of ventilation groove 620. When the moving contact 8 moves downward, extrusion block 621 contacts with sliding plate 614.

[0040] See also Figure 1 and Figure 2 A ring network cabinet using the above-mentioned load switch includes a cabinet body 1 and a cabinet door 2, the cabinet door 2 is hinged on the cabinet body 1, the support frame 5 is fixedly connected to the inner wall of the shell, a fixing rod 3 is fixedly connected inside the ring network cabinet, and a collecting bin 4 is slidably connected to the fixing rod 3, the interior of the collecting bin 4 is connected to the cleaning pipe three 618, and the upper surface of the interior of the collecting bin 4 is provided with an arc surface 401.

[0041] See also Figures 1 to 8, the control rod 9 drives the moving contact 8 to move downward. When the staff operates the control rod 9 to disconnect the load switch, the moving contact 8 moves downward and separates from the static contact 7. During the movement of the moving contact 8, the rack 2 607 on the moving contact 8 drives the gear 605 to rotate, and the gear 605 further drives the rack 1 606 to move. The rack 1 606 moves and pushes the piston 604 to move upward. The piston 604 compresses the gas inside the sleeve 6. Since the cleaning pipe 2 603 and the cleaning pipe 3 618 are blocked by the moving contact 8 and the sliding plate 614 respectively, the gas inside the sleeve 6 can only be ejected through the cleaning pipe 1 602. The high-speed gas ejected from the cleaning pipe 1 602 blows out the static contact 7. At this time, there is an arc between the contact 7 and the moving contact 8. After the moving contact 8 moves downward for a certain distance, the moving contact 8 is no longer in contact with the buckle 612. The torsion spring on the buckle 612 causes the buckle 612 to rotate. At this time, the buckle 612 is away from the cleaning block 608. The high-speed airflow ejected from the cleaning pipe 602 blows the cleaning block 608 around the top of the groove 610, so that the friction protrusion 622 on the cleaning block 608 contacts the static contact 7. At this time, the high-speed airflow acts on the vent 2 623 on the cleaning block 608 to vibrate the cleaning block 608. The moving contact 8 continues to move downward for a certain distance. When the moving contact 8 completely leaves the outlet of the cleaning pipe 2 603, The high-speed airflow is ejected from the cleaning pipe 603, and the high-speed airflow ejected from the cleaning pipe 603 blows the cleaning block 609 around the bottom of the groove 610, so that the friction protrusion 622 on the cleaning block 609 contacts the moving contact 8. At this time, the high-speed airflow acts on the vent hole 623 on the cleaning block 609 to vibrate the cleaning block. When the moving contact 8 continues to move downward for a certain distance, the squeezing block 621 on the moving contact 8 contacts the sliding plate 614 and squeezes the sliding plate 614 and the spring 619 to move the sliding plate 614 downward. At this time, the sliding plate 614 is away from the entrance of the cleaning pipe 3 618, and the blocking block 615 on the sliding plate 614 follows the sliding plate 6 14 moves together and blocks the entrance of cleaning pipe 1 602. At this time, there is no more airflow ejected from cleaning pipe 1 602 and cleaning pipe 2 603. The cleaning block 1 608 loses the push of the airflow and falls back into the groove 1 610 due to its own gravity. The airflow inside the sleeve 6 rushes to the cleaning pipe 3 618 and the ventilation groove 620 and is ejected. The high-speed airflow blows up the collecting bin 4. At this time, the carbon deposits and dust cleaned up near the static contact 7 and the moving contact 8 will follow the airflow and contact the arc surface 401 of the collecting bin 4 and enter the collecting bin 4. At this time, the moving contact 8 continues to move downward for a certain distance and stops. The cleaning pipe 3 618 stops ejecting gas, and the collecting bin 4 loses the thrust of the airflow and falls.

[0042] See also Figures 1 to 8, the control rod 9 drives the moving contact 8 to move upward. When the staff operates the control rod 9 to close the load switch, the moving contact 8 moves upward. During the movement of the moving contact 8, the rack 2 607 on the moving contact 8 drives the gear 605 to rotate, and the gear 605 further drives the rack 1 606 to move. The rack 1 606 moves and drives the piston 604 to move downward. During the upward movement of the moving contact 8, the cleaning block 2 609 will be pushed back into the groove 2 611, and the moving contact 8 squeezes the buckle 612 to rotate the buckle 612. The buckle 612 rotates and contacts with the cleaning block 1 608. During the upward movement of the moving contact 8, the squeezing block 1 621 on the moving contact 8 moves with the moving contact 8, and the squeezing block 1 621 moves away from the sliding plate 614. The squeezing block 2 624 on the moving contact 8 contacts the bottom of the sliding plate 614 and pushes the sliding plate 614. The sliding plate 614 moves upward, and the moving contact 8 contacts the static contact 7 after moving a certain distance.

[0043] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A load switch, comprising a support frame (5), a sleeve (6), a static contact (7) and a moving contact (8), wherein the sleeve (6) and the static contact (7) are both fixedly connected to the support frame (5), a control rod (9) is hingedly connected to the support frame (5), and the moving contact (8) is slidably connected to the sleeve (6) and one end of the moving contact is hingedly connected to the control rod (9), characterized in that: A nozzle (601) is fixedly installed inside the sleeve (6), and a plurality of cleaning pipes (602) and cleaning pipes (603) are arranged inside the nozzle (601). The cleaning pipe (602) connects the outside of the sleeve (6) with the inside of the sleeve (6), and the center line of the cleaning pipe (602) points to the lower surface of the stationary contact (7). One end of the cleaning pipe (603) is connected to the cleaning pipe (602), and the other end is connected to the outside of the sleeve (6), and the center line of the cleaning pipe (603) points to the upper surface of the moving contact (8). A piston (603) is also arranged inside the sleeve (6). 04) and a gear (605), a rack one (606) is fixedly connected to the piston (604), the gear (605) is rotatably connected to the inside of the sleeve (6), the rack one (606) is meshed with the gear (605), a rack two (607) is fixedly installed on the moving contact (8), the gear (605) is meshed with the rack two (607), and a cleaning component is also provided on the nozzle (601), when the control rod (9) drives the moving contact (8) to move downward, when the nozzle (601) sprays airflow, the airflow pushes the cleaning component to contact the surfaces of the moving contact (8) and the static contact (7).

2. A load switch according to claim 1, characterized in that: The cleaning assembly includes a cleaning block 1 (608) and a cleaning block 2 (609). The nozzle (601) is provided with a plurality of grooves 1 (610) and grooves 2 (611), respectively. The number of grooves 1 (610) and grooves 2 (611) is half the number of cleaning pipes 1 (602) and cleaning pipes 2 (603). The plurality of grooves 1 (610) are evenly distributed on the nozzle (601) around the circumference. The grooves 1 (610) are arranged on the cleaning pipes 1 (602) and 1 (603). At the outlet of pipe one (602), a plurality of grooves two (611) are evenly distributed on the nozzle (601) on a circumference, and groove two (611) is arranged at the outlet of cleaning pipe two (603). Cleaning block one (608) is hinged at the upper end of groove one (610), and cleaning block two (609) is hinged at the lower end of groove two (611). Cleaning block one (608) and cleaning block two (609) are in contact with the stationary contact (7) and the moving contact (8) respectively.

3. A load switch according to claim 2, characterized in that: A buckle (612) is hinged on the groove one (610), and a torsion spring is arranged on the buckle (612). The torsion spring pushes the buckle (612) to rotate toward the outer side of the groove one (610). When the moving contact (8) contacts the static contact (7), one side of the buckle (612) contacts the moving contact (8), and the moving contact (8) pushes the buckle (612) to rotate to the inside of the groove one (610), and the other side of the buckle (612) contacts the cleaning block one (608).

4. A load switch according to claim 3, characterized in that: A ventilation chamber (613) is also provided inside the cleaning pipe (602), a sliding plate (614) is slidably connected inside the sleeve (6), a blocking block (615) is slidably connected inside the ventilation chamber (613), a connecting rod (616) is fixedly connected to the bottom of the blocking block (615), the connecting rod (616) is fixedly connected to the sliding plate (614), the diameter of the blocking block (615) is consistent with the diameter of the cleaning pipe (602), the diameter of the connecting rod (616) is smaller than the diameter of the cleaning pipe, a ventilation hole (617) is provided at the connection between the sliding plate (614) and the connecting rod (616), and a cleaning pipe (613) is also provided on the nozzle (601). 8), the cleaning pipe three (618) connects the inside of the sleeve (6) with the outside of the sleeve (6), the upper surface of the sliding plate (614) fits with the lower surface of the nozzle (601), a spring (619) is arranged between the bottom of the sliding plate (614) and the inner wall of the sleeve (6), a plurality of ventilation grooves (620) are opened on the nozzle (601), an extrusion block one (621) is fixedly installed on the moving contact (8), the extrusion block one (621) is slidably connected inside the ventilation groove (620), and the surface of the extrusion block one (621) fits with the inner wall of the ventilation groove (620), when the moving contact (8) moves downward, the extrusion block one (621) contacts the sliding plate (614).

5. A load switch according to claim 2, characterized in that: The cleaning block 1 (608) and the cleaning block 2 (609) are both made of flexible materials. The cleaning block 1 (608) and the cleaning block 2 (609) are both provided with friction protrusions (622). The friction protrusions (622) on the cleaning block 1 (608) are in contact with the stationary contact (7), and the friction protrusions (622) on the cleaning block 2 (609) are in contact with the moving contact (8). The cleaning block 1 (608) and the cleaning block 2 (609) are also provided with ventilation holes 2 (623).

6. A load switch according to claim 4, characterized in that: The length of the sealing block (615) inside the cleaning pipe (602) provided with the groove (610) is consistent with the thickness of the bottom surface of the ventilation chamber (613), and the length of the sealing block (615) inside the cleaning pipe (602) without the groove (610) is greater than the thickness of the bottom surface of the ventilation chamber (613). The moving contact (8) is also provided with an extrusion block (624), and the extrusion block (624) is in contact with the lower surface of the sliding plate (614).

7. A load switch according to claim 5, characterized in that: When the cleaning block 1 (608) is in contact with the static contact (7), the angle between the cleaning block 1 (608) and the moving contact (8) is A, and A≥90°; when the cleaning block 2 (609) is in contact with the moving contact (8), the angle between the cleaning block 2 (609) and the inner wall of the nozzle (601) is B, and B≥90°.

8. A ring main unit equipped with a load switch according to any one of claims 1 to 7, comprising a cabinet body (1) and a cabinet door (2), wherein the cabinet door (2) is hinged on the cabinet body (1), and the support frame (5) is fixedly connected to the inner wall of the housing, characterized in that: A fixing rod (3) is fixedly connected inside the ring network cabinet, a collecting bin (4) is slidably connected to the fixing rod (3), the inside of the collecting bin (4) is connected to a cleaning pipe three (618), and an arc surface (401) is provided on the inner upper surface of the collecting bin (4).

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