A DC circuit breaker

Abstract

The present invention discloses a DC circuit breaker, specifically relates to the field of circuit breakers, including a circuit breaker body, both sides of the circuit breaker body are fixedly connected with a device box, the inner wall of the device box is fixedly connected with a support platform, and one end of the support platform away from the device box is fixedly connected with an electromagnetic block. The present invention sets a support plate, when a circuit fails, the electromagnetic block is separated from the first iron sheet and the second iron sheet, and the first iron sheet is driven to move upward by the first spring, and at the same time, the connecting member pulls the disc to rotate clockwise, driving the pressure plate to press downward, so that the pressure rod rotates clockwise on the outer wall of the mounting column, squeezing the circuit switch on one side of the circuit breaker to close, and at the same time, the second spring pushes the movable rod to drive the second iron sheet to move downward, thereby pulling the rack to move downward and driving the gear to rotate counterclockwise, so that the support plate fits with the pressure rod, avoiding reopening the circuit breaker when the circuit hidden danger has not been eliminated, and improving the safety of the circuit breaker.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and more particularly to a direct current circuit breaker. Background Art

[0002] A circuit breaker is a switching device that can close, carry and interrupt current under normal or abnormal circuit conditions. It is an important electrical device for the protection and operation of power systems. It can be used to distribute electrical energy, start asynchronous motors infrequently, and protect power lines and motors. Circuit breakers have many structures and different types, but basically they are composed of a conductive main circuit, insulating supports, arc extinguishing chambers and operating mechanisms. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use.

[0003] The Chinese patent with application number CN202110581704.2 discloses a high-voltage DC circuit breaker, including a circuit breaker body, a mounting plate and a protective cover, wherein the circuit breaker body and the mounting plate are fixedly connected together, a clamping mechanism is provided on the side of the mounting plate close to the circuit breaker body, two wiring mechanisms are provided on the top and bottom of the circuit breaker body, a clamping groove is provided on the inner walls of both sides of the protective cover, and a sealing mechanism is provided in the protective cover; wherein the clamping mechanism includes a latch, a rotating groove is provided on the side of the mounting plate close to the circuit breaker body, and the latch and the inner wall of the rotating groove are rotatably connected together. The present invention can completely isolate the circuit breaker body 1 from the outside air, ensure that the circuit breaker body can work normally in a relatively harsh environment, and make the connection between the wire and the circuit breaker body 1 very fast and convenient, and the connection relationship between the wire and the circuit breaker body 1 can always be guaranteed to be firm. However, during the use of the patent, when the circuit hidden danger is not completely eliminated, reopening the closed circuit breaker can easily cause the circuit to be burned, causing greater safety hazards.

[0004] However, in the existing technology, when using circuit breakers, the circuit breaker structure is single. After a power outage, the automatic protection function of the circuit breaker fails, and the circuit breaker cannot be disconnected during a power outage. When there is a fault in the circuit, it may cause damage to electrical equipment or threaten personal safety. Traditional circuit breakers are usually closed due to circuit faults. When the circuit hidden dangers are not completely eliminated, the closed circuit breaker will be reopened, which may easily cause the circuit to be burned, causing greater safety hazards and leading to unnecessary losses. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a DC circuit breaker, which is equipped with a support plate. When a circuit fault occurs, the electromagnetic block is separated from the first iron sheet and the second iron sheet, and the first iron sheet is driven to move upward by the first spring. At the same time, the connecting member pulls the disc to rotate clockwise, driving the pressure plate to press downward, so that the pressure rod rotates clockwise on the outer wall of the mounting column, squeezing the circuit switch on one side of the circuit breaker to close, and at the same time, the second spring pushes the movable rod to drive the second iron sheet to move downward, thereby pulling the rack to move downward and driving the gear to rotate counterclockwise, so that the support plate is fitted with the pressure rod, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a DC circuit breaker, comprising a circuit breaker body, both sides of the circuit breaker body are fixedly connected with a device box, the inner wall of each device box is fixedly connected with a support platform, the end of the support platform away from the device box is fixedly connected with an electromagnetic block, the inner wall of the device box is provided with a wire, and the wire is fixedly connected to the circuit breaker body and the electromagnetic block.

[0007] Preferably, a first groove is provided on the inner wall of the device box, a first fixing rod is fixedly connected to the inner wall of the first groove, a sleeve is slidably connected to the outer wall of the first fixing rod, a first spring is connected between the bottom end of the sleeve and the first groove, the first spring is sleeved on the outer wall of the first fixing rod, a first iron sheet is provided on the top of the electromagnetic block, the first iron sheet is fixedly connected to the sleeve, and a connecting piece is hinged on one side of the first iron sheet.

[0008] Preferably, the inner wall of the device box is rotatably connected to a disc, the disc is hinged to the connecting piece, the outer wall of the disc is fixedly connected to a pressure plate, the inner wall of each device box is fixedly connected to a mounting column, a second groove is opened on one side of each device box, the inner wall of the second groove is provided with the same pressure rod, and both ends of the pressure rod are rotatably connected to the mounting column respectively.

[0009] Preferably, the inner wall of the device box is fixedly connected to a first hollow tube, the inner wall of the first hollow tube is fixedly connected to a second fixed rod, the inner wall of the first hollow tube is slidably connected to a movable rod, the movable rod is slidably connected to the second fixed rod, a second spring is connected between the top end of the first hollow tube and the bottom end of the movable rod, the second spring is sleeved on the outer wall of the second fixed rod, a second iron sheet is provided at the bottom of the electromagnetic block, and the bottom of the second iron sheet is fixedly connected to the movable rod.

[0010] Preferably, the inner wall of the device box is fixedly connected to a mounting plate, a third groove is opened on one side of the mounting plate, a rack is slidably connected to the inner wall of the third groove, the inner wall of the device box is rotatably connected to a gear, a connecting rod is fixedly connected to the side of the rack close to the first hollow tube, the end of the connecting rod away from the gear is fixedly connected to the top of the movable rod, the gear is meshed with the rack, and the outer wall of the gear is fixedly connected to a support plate.

[0011] Preferably, a fourth groove is provided on one side of the device box, a cover plate is slidably connected to the inner wall of the fourth groove, a plurality of first mounting blocks are fixedly connected to one side of the circuit breaker body, a fifth groove is provided on one side of the plurality of first mounting blocks, and a switch is rotatably connected to the inner wall of the fifth groove.

[0012] Preferably, a plurality of second mounting blocks are fixedly connected to one side of the circuit breaker body, each of the second mounting blocks is located at the bottom of the first mounting block, a sixth groove is formed on the outer wall of the plurality of second mounting blocks, and a support rod is hinged on the inner wall of the sixth groove.

[0013] Preferably, the outer wall of the support rod is slidably connected to a second hollow tube, the second hollow tube is hinged to the switch, the bottom end of each of the second hollow tubes is connected to the second mounting block with a third spring, and the third spring is sleeved on the outer wall of the support rod.

[0014] Preferably, a plurality of third fixing rods are fixedly connected to one side of the circuit breaker body, an adjustment block is slidably connected to the outer wall of the plurality of third fixing rods, a latch is rotatably connected to the outer wall of the adjustment block, a fixing plate is fixedly connected to one side of the switch, and a hinged rod is hinged on the inner wall of the fixing plate.

[0015] Preferably, the outer wall of the adjusting block is fixedly connected with a connecting rod, the end of the connecting rod away from the adjusting block is hinged with a hinged rod, the outer wall of the third fixed rod is provided with a limiting hole, both sides of the circuit breaker body are fixedly connected with a mounting seat, one side of the mounting seat is rotatably connected with a threaded rod, and one side of the circuit breaker body is fixedly connected with a plurality of connecting terminals.

[0016] Technical effects and advantages of the present invention:

[0017] 1. The present invention cooperates with the electromagnetic block and the first iron sheet and the second iron sheet to take measures on the switch when the conductor is powered off or powered on, so that the circuit breaker can be disconnected during a power outage, thereby avoiding faults in the circuit during a power outage, preventing damage to electrical equipment or threats to personal safety, ensuring the safety of the circuit breaker during a power outage, and improving the protection function of the DC circuit breaker;

[0018] 2. The present invention is provided with a pressure rod. When a circuit fails, the electromagnetic block is separated from the first iron sheet, and the first iron sheet is driven by the first spring to slide upward on the outer wall of the first fixed rod, so that the connecting piece pulls the disc to rotate clockwise, driving the pressure plate to press downward, so that the pressure rod rotates clockwise on the outer wall of the mounting column, thereby squeezing the switch to rotate in the fifth groove, so that the second hollow tube slides on the outer wall of the support rod, and the circuit is disconnected. When the hidden danger of the circuit is completely eliminated, the wire is energized to reopen the closed circuit breaker to avoid the line from being burned out, thereby reducing the safety hazard of the circuit breaker and increasing the service life of the DC circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a cross-sectional view of the connecting piece structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the wiring terminal structure of the present invention;

[0022] Figure 4 It is a cross-sectional view of the device box structure of the present invention;

[0023] Figure 5 It is a cross-sectional view of the electromagnetic block structure of the present invention;

[0024] Figure 6 It is a schematic diagram of the switch structure of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the adjustment block of the present invention.

[0026] The accompanying drawings are marked as follows: 1, circuit breaker body; 2, device box; 3, support platform; 4, electromagnetic block; 5, wire; 6, first groove; 7, first fixing rod; 71, sleeve; 8, first spring; 9, first iron sheet; 10, connecting piece; 11, disc; 12, pressure plate; 13, mounting column; 14, second groove; 15, pressure rod; 16, first hollow tube; 17, second fixing rod; 18, second spring; 19, movable rod; 20, second iron sheet; 21, mounting plate; 22, third groove; 23, gear 1. a gear; 24. a support plate; 25. a fourth groove; 27. a cover plate; 28. a first mounting block; 29. ​​a fifth groove; 30. a switch; 31. a second mounting block; 32. a sixth groove; 33. a support rod; 34. a third spring; 35. a second hollow tube; 36. a third fixing rod; 37. an adjusting block; 38. a fixing plate; 39. a hinged rod; 40. a connecting rod; 41. a latch; 42. a limiting hole; 43. a mounting seat; 44. a threaded rod; 45. a terminal; 46. a connecting rod. DETAILED DESCRIPTION

[0027] 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.

[0028] Example 1

[0029] During use, the existing circuit breaker has a single structure. After a power outage, the automatic protection function of the circuit breaker fails and the circuit breaker cannot be disconnected during a power outage. When there is a fault in the circuit, electrical equipment may be damaged or personal safety may be threatened.

[0030] like Figure 1-Figure 4 As shown, a DC circuit breaker includes a circuit breaker body 1, both sides of the circuit breaker body 1 are fixedly connected with device boxes 2, the inner wall of each device box 2 is fixedly connected with a support platform 3, the end of the support platform 3 away from the device box 2 is fixedly connected with an electromagnetic block 4, the inner wall of the device box 2 is provided with a wire 5, the wire 5 is fixedly connected to the circuit breaker body 1 and the electromagnetic block 4, the wire 5 is electrically connected to the electromagnetic block 4, and the wire 5 is fixedly connected to the circuit breaker body 1 and the electromagnetic block 4.

[0031] like Figure 1 - Figure 5 As shown, the inner wall of the device box 2 is provided with a first groove 6, the inner wall of the first groove 6 is fixedly connected with a first fixing rod 7, the outer wall of the first fixing rod 7 is slidably connected with a sleeve 71, a first spring 8 is connected between the bottom end of the sleeve 71 and the first groove 6, the first spring 8 is sleeved on the outer wall of the first fixing rod 7, a first iron sheet 9 is provided on the top of the electromagnetic block 4, the first iron sheet 9 is fixedly connected with the sleeve 71, and a connecting piece 10 is hinged on one side of the first iron sheet 9. When the electromagnetic block 4 is energized, the electromagnetic block 4 generates magnetism to adsorb the first iron sheet 9. At this time, the first spring 8 is in a compressed state under the action of the sleeve 71. When the electromagnetic block 4 is powered off and has no magnetism, the first spring 8 The elastic release, the first spring 8 pushes the sleeve 71 to slide upward on the outer wall of the first fixed rod 7, the sleeve 71 drives the first iron sheet 9 to move upward, the inner wall of the device box 2 is rotatably connected with the disc 11, the disc 11 is hinged with the connecting piece 10, the outer wall of the disc 11 is fixedly connected with the pressure plate 12, the inner wall of each device box 2 is fixedly connected with the mounting column 13, a second groove 14 is opened on one side of each device box 2, the inner wall of the second groove 14 is provided with the same pressure rod 15, the two ends of the pressure rod 15 are respectively rotatably connected with the mounting column 13, the first iron sheet 9 moves upward to drive the connecting piece 10 to pull the disc 11 to rotate clockwise, driving the pressure plate 12 to press downward.

[0032] like Figure 4 - Figure 6 As shown, the inner wall of the device box 2 is fixedly connected with a first hollow tube 16, the inner wall of the first hollow tube 16 is fixedly connected with a second fixed rod 17, the inner wall of the first hollow tube 16 is slidably connected with a movable rod 19, the movable rod 19 is slidably connected to the second fixed rod 17, a second spring 18 is connected between the top of the first hollow tube 16 and the bottom of the movable rod 19, the second spring 18 is sleeved on the outer wall of the second fixed rod 17, a second iron sheet 20 is arranged at the bottom of the electromagnetic block 4, the bottom of the second iron sheet 20 is fixedly connected to the movable rod 19, when the electromagnetic block 4 is energized, the electromagnetic block 4 generates magnetism to adsorb the second iron sheet 20, at this time, the second spring 18 is in a compressed state under the action of the movable rod 19, when the electromagnetic block 4 is powered off and has no magnetism, the second spring 18 is elastically released, and the second spring 18 pushes the movable rod 19 to move downward, the inner wall of the device box 2 is fixedly connected with a mounting plate 21, and a third groove 22 is provided on one side of the mounting plate 21. The inner wall of 22 is slidably connected with a rack 23, and the inner wall of the device box 2 is rotatably connected with a gear 24. A connecting rod 46 is fixedly connected to one side of the rack 23 close to the first hollow tube 16, and an end of the connecting rod 46 away from the gear 24 is fixedly connected to the top of the movable rod 19. The gear 24 meshes with the rack 23, and a support plate 25 is fixedly connected to the outer wall of the gear 24. The movable rod 19 drives the second iron sheet 20 to move downward, thereby pulling the rack 23 to move downward and driving the gear 24 to rotate counterclockwise, so that the support plate 25 fits with the pressure rod 15 to limit the pressure rod 15. A fourth groove 26 is provided on one side of the device box 2, and a cover plate 27 is slidably connected to the inner wall of the fourth groove 26. The cover plate 27 is used to protect the power supply in the device box 2. A plurality of first mounting blocks 28 are fixedly connected to one side of the circuit breaker body 1, and a fifth groove 29 is provided on one side of the plurality of first mounting blocks 28. A switch 30 is rotatably connected to the inner wall of the fifth groove 29.

[0033] When the electromagnetic block 4 is used to energize the wire 5, the electromagnetic block 4 has magnetic force to adsorb the first iron sheet 9 and the second iron sheet 20, so that the first spring 8 and the second spring 18 are in a compressed state. When the wire 5 is powered off, the magnetism of the electromagnetic block 4 disappears, and the compressed elastic potential energy of the first spring 8 and the second spring 18 is released. The first spring 8 pushes the sleeve 71 to slide upward on the outer wall of the first fixing rod 7, and the sleeve 71 drives the first iron sheet 9 to move upward. At the same time, the connecting member 10 pulls the disc 11 to rotate clockwise, driving the pressure plate 12 to press the switch 30 downward, so that The pressure rod 15 rotates clockwise on the outer wall of the mounting column 13, and the pressure plate 12 squeezes the circuit switch 30 on one side of the circuit breaker to close, thereby ensuring the safety of the circuit breaker during a power outage and improving the protection function of the DC circuit breaker. When the electromagnetic block 4 loses its magnetic force, the second spring 18 pushes the movable rod 19 to drive the second iron sheet 20 to move downward, thereby pulling the rack 23 to move downward and driving the gear 24 to rotate counterclockwise, so that the support plate 25 fits the pressure rod 15 and limits the pressure rod 15. The support plate 25 can relieve the gravity of the pressure rod 15 pressing down to avoid the switch 3 0 is damaged by gravity, the service life of the circuit breaker switch 30 is increased, and the hidden dangers of the circuit are completely eliminated. The wire 5 is energized, so that the electromagnetic block 4 has a magnetic force to adsorb the first iron sheet 9 and the second iron sheet 20. The first iron sheet 9 moves downward to drive the sleeve 71 to move, and the sleeve 71 squeezes the first spring 8. At the same time, the connecting member 10 pulls the disc 11 to rotate counterclockwise, driving the pressure plate 12 to rotate counterclockwise, and the pressure plate 12 stops pressing the switch 30. At the same time, the second iron sheet 20 drives the movable rod 19 to squeeze the second spring 18 and move upward, thereby pulling the rack 23 upward. The moving gear 24 rotates clockwise, so that the support plate 25 is separated from the pressure rod 15, and the pressure rod 15 is stopped from being limited. At this time, the switch 30 can be safely opened, and the electromagnetic block 4 cooperates with the first iron sheet 9 and the second iron sheet 20. Measures taken on the switch 30 when the wire 5 is powered off and powered on can disconnect the circuit breaker during a power outage, avoiding faults in the circuit during a power outage, preventing damage to electrical equipment or threats to personal safety, ensuring the safety of the circuit breaker during a power outage, and improving the protection function of the DC circuit breaker.

[0034] By cooperating with the electromagnetic block 4 and the first iron sheet 9 and the second iron sheet 20, measures are taken on the switch 30 when the conductor 5 is powered on or off, so that the circuit breaker can be disconnected during a power outage, thereby avoiding faults in the circuit during a power outage, preventing damage to electrical equipment or threats to personal safety, ensuring the safety of the circuit breaker during a power outage, and improving the protection function of the DC circuit breaker.

[0035] Example 2

[0036] On the basis of the above embodiments, during the use of the existing circuit breaker, if the circuit hidden danger is not completely eliminated, the closed circuit breaker will be reopened, which may easily cause the circuit to be burned, causing greater safety hazards and unnecessary losses.

[0037] like Figure 1 - Figure 6 As shown, a plurality of second mounting blocks 31 are fixedly connected to one side of the circuit breaker body 1, each second mounting block 31 is located at the bottom of the first mounting block 28, a sixth groove 32 is formed on the outer wall of the plurality of second mounting blocks 31, a support rod 33 is hingedly connected to the inner wall of the sixth groove 32, a second hollow tube 35 is slidably connected to the outer wall of the support rod 33, the second hollow tube 35 is hingedly connected to the switch 30, a third spring 34 is connected between the bottom end of each second hollow tube 35 and the second mounting block 31, the third spring 34 is sleeved on the outer wall of the support rod 33, and in a normal state, the third spring 34 is in a supporting state, and the third spring 34 supports the switch 30 through the second hollow tube 35.

[0038] When a circuit fault occurs, the electromagnetic block 4 is separated from the first iron sheet 9, and the first spring 8 drives the first iron sheet 9 to slide upward on the outer wall of the first fixing rod 7, so that the connecting piece 10 pulls the disc 11 to rotate clockwise, driving the pressure plate 12 to press downward, so that the pressure rod 15 rotates clockwise on the outer wall of the mounting column 13, thereby squeezing the switch 30 to rotate in the fifth groove 29, so that the second hollow tube 35 slides on the outer wall of the support rod 33, and the second hollow tube 35 squeezes the third spring 34, and the third spring 34 is in a compressed state, so that the circuit is disconnected. When the circuit fault is eliminated, the electromagnetic block 4 is powered on again, the first iron sheet 9 is adsorbed and moved downward, and the pressure rod 15 is pulled back to its original position through the connecting piece 10, and the elastic potential energy of the third spring 34 is released to push the second hollow tube 35 to slide upward, so that the switch 30 is reset, and the circuit is powered on. When the circuit hidden danger is completely eliminated, the wire 5 is powered on to reopen the closed circuit breaker to avoid the line from being burned out, thereby improving the safety hidden dangers of the circuit breaker and improving the service life of the DC circuit breaker.

[0039] like Figure 7As shown, a plurality of third fixing rods 36 are fixedly connected to one side of the circuit breaker body 1, and an adjustment block 37 is slidably connected to the outer wall of the plurality of third fixing rods 36. The third fixing rods 36 are the movable path of the adjustment block 37, and the outer wall of the adjustment block 37 is rotatably connected to a latch 41. A fixing plate 38 is fixedly connected to one side of the switch 30, and an articulated rod 39 is hingedly connected to the inner wall of the fixing plate 38. A connecting rod 40 is fixedly connected to the outer wall of the adjustment block 37, and an end of the connecting rod 40 away from the adjustment block 37 is hingedly connected to the articulated rod 39. The outer wall of the third fixing rod 36 is fixedly connected to the outer wall of the adjustment block 37. A limit hole 42 is provided on the wall. When the adjustment block 37 is pushed to slide to the limit hole 42 on the outer wall of the third fixing rod 36, the latch 41 is inserted into the limit hole 42. The limit hole 42 limits the position of the adjustment block 37. Both sides of the circuit breaker body 1 are fixedly connected with mounting seats 43. One side of the mounting seat 43 is rotatably connected with a threaded rod 44. One side of the circuit breaker body 1 is fixedly connected with a plurality of wiring terminals 45. The threaded rod 44 is used to install and fix the circuit breaker. The wiring terminals 45 are used to connect external wires of the circuit breaker.

[0040] By sliding the adjustment block 37, the adjustment block 37 drives the connecting rod 40 to move, and the latch 41 is inserted into the limiting hole 42. The limiting hole 42 limits the position of the adjustment block 37, so that the hinged rod 39 pulls the hinged rod 39 to move, thereby pulling the switch 30 to rotate in the fifth groove 29, so that the second hollow tube 35 slides on the outer wall of the support rod 33, so that the single switch on one side of the circuit breaker is closed, which is convenient for maintenance and installation of the line on the single switch on one side of the circuit breaker, thereby improving the practicality of the device.

[0041] Through the arrangement of the pressure rod 15, when a circuit fault occurs, the electromagnetic block 4 is separated from the first iron sheet 9, and the first spring 8 drives the first iron sheet 9 to slide upward on the outer wall of the first fixing rod 7, so that the connecting piece 10 pulls the disc 11 to rotate clockwise, and drives the pressure plate 12 to press downward, so that the pressure rod 15 rotates clockwise on the outer wall of the mounting column 13, thereby squeezing the switch 30 to rotate in the fifth groove 29, so that the second hollow tube 35 slides on the outer wall of the support rod 33, so that the circuit is disconnected. When the circuit hidden danger is completely eliminated, the wire 5 is energized to reopen the closed circuit breaker to avoid the line from being burned out, thereby improving the safety hidden dangers of the circuit breaker and increasing the service life of the DC circuit breaker.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A DC circuit breaker, comprising a circuit breaker body, characterized in that: Both sides of the circuit breaker body are fixedly connected with a device box, the inner wall of each device box is fixedly connected with a support platform, one end of the support platform away from the device box is fixedly connected with an electromagnetic block, and the inner wall of the device box is provided with a wire, and the wire is fixedly connected to the circuit breaker body and the electromagnetic block; The inner wall of the device box is provided with a first groove, the inner wall of the first groove is fixedly connected with a first fixing rod, the outer wall of the first fixing rod is slidably connected with a sleeve, a first spring is connected between the bottom end of the sleeve and the first groove, the first spring is sleeved on the outer wall of the first fixing rod, a first iron sheet is provided on the top of the electromagnetic block, the first iron sheet is fixedly connected with the sleeve, and a connecting piece is hinged on one side of the first iron sheet; The inner wall of the device box is rotatably connected with a disc, the disc is hinged with the connecting piece, the outer wall of the disc is fixedly connected with a pressure plate, the inner wall of each device box is fixedly connected with a mounting column, a second groove is opened on one side of each device box, the inner wall of the second groove is provided with a same pressure rod, and both ends of the pressure rod are rotatably connected with the mounting column respectively; The inner wall of the device box is fixedly connected with a first hollow tube, the inner wall of the first hollow tube is fixedly connected with a second fixed rod, the inner wall of the first hollow tube is slidably connected with a movable rod, the movable rod is slidably connected to the second fixed rod, a second spring is connected between the top end of the first hollow tube and the bottom end of the movable rod, the second spring is sleeved on the outer wall of the second fixed rod, a second iron sheet is arranged at the bottom of the electromagnetic block, and the bottom of the second iron sheet is fixedly connected to the movable rod; The inner wall of the device box is fixedly connected with a mounting plate, a third groove is opened on one side of the mounting plate, a rack is slidably connected to the inner wall of the third groove, a gear is rotatably connected to the inner wall of the device box, a connecting rod is fixedly connected to the side of the rack close to the first hollow tube, an end of the connecting rod away from the gear is fixedly connected to the top of the movable rod, the gear is meshed with the rack, and the outer wall of the gear is fixedly connected to a support plate; A fourth groove is provided on one side of the device box, a cover plate is slidably connected to the inner wall of the fourth groove, a plurality of first mounting blocks are fixedly connected to one side of the circuit breaker body, a fifth groove is provided on one side of the plurality of first mounting blocks, and a switch is rotatably connected to the inner wall of the fifth groove; A plurality of second mounting blocks are fixedly connected to one side of the circuit breaker body, each of the second mounting blocks is located at the bottom of the first mounting block, a sixth groove is formed on the outer wall of the plurality of second mounting blocks, and a support rod is hinged on the inner wall of the sixth groove; The outer wall of the support rod is slidably connected with a second hollow tube, the second hollow tube is hinged to the switch, and a third spring is connected between the bottom end of each second hollow tube and the second mounting block, and the third spring is sleeved on the outer wall of the support rod.

2. A DC circuit breaker according to claim 1, characterized in that: A plurality of third fixing rods are fixedly connected to one side of the circuit breaker body, an adjustment block is slidably connected to the outer wall of the plurality of third fixing rods, a latch is rotatably connected to the outer wall of the adjustment block, a fixing plate is fixedly connected to one side of the switch, and a hinged rod is hingedly connected to the inner wall of the fixing plate.

3. A DC circuit breaker according to claim 2, characterized in that: The outer wall of the adjustment block is fixedly connected with a connecting rod, and one end of the connecting rod away from the adjustment block is hinged with a hinged rod. The outer wall of the third fixed rod is provided with a limiting hole, and both sides of the circuit breaker body are fixedly connected with mounting seats, one side of the mounting seat is rotatably connected with a threaded rod, and one side of the circuit breaker body is fixedly connected with a plurality of wiring terminals.

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