Tandem direct-current high-current protector with magnetic quenching function

Abstract

The utility model relates to the technical field of protectors, in particular to a tandem type direct-current large-current protector with a magnetic quenching function, which comprises at least two groups of protector mechanisms, adjacent protector mechanisms are connected in series through mounting assemblies, and adjacent protector mechanisms are electrically connected through connecting assemblies. The protector mechanism comprises a liquid expansion type power assembly arranged on the surface of the base through a fixing assembly, a lifting rod and a contact type switch terminal assembly are arranged below the liquid expansion type power assembly, and the contact type switch terminal assembly is located in the base; the liquid expansion type power assembly is used for controlling the lifting rod to move up and down so as to control the contact type switch terminal assemblies to abut against each other or be separated from each other, so that closing or opening of the protector mechanism is achieved. A mounting seat provided with a magnet is arranged on the outer surface of the base in a protruding mode, and the mounting seat is arranged close to the contact type switch terminal assembly. According to the utility model, generation of electric arcs can be reduced, a dual protection mechanism is provided, and the reliability and safety of products are improved.

Description

Technical Field

[0001] This utility model relates to the field of protector technology, and in particular to a series DC high current protector with magnetic blowout arc extinguishing function. Background Technology

[0002] The development of current protectors can be traced back to the late 19th century. With the booming development of the power industry, current protectors emerged. Early on, due to technological limitations, current protectors primarily operated based on the thermal effect of current, preventing equipment damage and serious accidents such as fires caused by overloads and short circuits. With advancements in science and technology, current protectors have gradually become automated and intelligent. Modern current protectors can achieve precise current detection and rapid response through microprocessors, effectively improving the safety and stability of power systems.

[0003] However, current protectors using contact-type switch terminal assemblies are susceptible to arcing. Arcing occurs during the contactor switch contact separation process; it can damage electrical equipment, accelerate contactor burnout, and may even pose a hazard to human health.

[0004] Furthermore, current protectors may have shortcomings in their protection mechanisms. For example, without a dual protection mechanism, when a single protector fails, it may not be able to provide timely protection, increasing the safety risks to the power system. In practical applications, due to insufficient public awareness of the importance of current protectors, or due to economic reasons, damaged current protectors may not be replaced in a timely manner, which also increases the safety risks to the power grid operation. Utility Model Content

[0005] The purpose of this invention is to propose a series-type DC high-current protector with magnetic blowout arc extinguishing function, which can reduce the generation of electric arcs and provide a dual protection mechanism to improve the reliability and safety of the product.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A series-connected DC high-current protector with magnetic blowout arc extinguishing function includes at least two sets of protector mechanisms, adjacent protector mechanisms are connected in series by mounting components, and adjacent protector mechanisms are electrically connected by connecting components.

[0008] The protector mechanism includes a base, on the surface of which a hydraulic power assembly is fixed by a fixing component. A lifting rod is installed at the drive end of the hydraulic power assembly, and a contact switch terminal assembly is provided at the bottom end of the lifting rod. The contact switch terminal assembly is located inside the base.

[0009] The hydraulic power assembly is used to control the up and down movement of the lifting rod, and the up and down movement of the lifting rod is used to control the contact switch terminal assembly to abut or separate from each other, so as to realize the closing or opening of the protector mechanism.

[0010] The outer surface of the base is provided with a mounting seat protruding from it. The mounting seat is located close to the contact switch terminal assembly. The mounting seat has a mounting groove, and a magnet is installed in the mounting groove.

[0011] Preferably, the contact-type switch terminal assembly includes a contact-type switch terminal sub-assembly, which includes a moving terminal, a moving contact, a stationary terminal, a stationary contact, and a spring;

[0012] The middle part of the upper surface of the moving terminal is connected to the bottom end of the lifting rod, and the middle part of the lower surface of the moving terminal abuts against the base with the spring.

[0013] The moving terminal has moving contacts at both ends of its upper surface;

[0014] The number of stationary terminals is two, and the two stationary terminals are respectively disposed at both ends of the moving contact, and the two stationary terminals are respectively located above the moving contact. The two stationary terminals are each provided with a stationary contact at the end closest to the moving terminal, and the stationary contact and the moving contact are disposed opposite to each other.

[0015] One of the stationary contacts is electrically connected to one end of the stationary contact of the adjacent protector mechanism via the connecting assembly.

[0016] The other end of the other stationary contact extends through the base and is connected to a terminal insert, which is used for connecting external electronic components.

[0017] Preferably, the number of the contact switch terminal assemblies is two sets;

[0018] The outer surface of the lifting rod is provided with two abutting parts, and the two abutting parts are respectively arranged opposite to the two sets of contact switch terminal sub-assemblies;

[0019] The outer surface of the base is provided with two mounting seats protruding from it. The two mounting seats are respectively located on both sides of the two sets of contact switch terminal assemblies, and the two mounting seats are arranged opposite each other along the moving direction perpendicular to the lifting rod. Both mounting seats are provided with mounting grooves, and magnets are installed in both mounting grooves. The arc-extinguishing magnetic fields of the two magnets have an overlapping area, and the two sets of contact switch terminal assemblies are located between the two magnets.

[0020] Preferably, the connecting assembly includes a connecting electrode and an insulating screw;

[0021] The base has a clearance opening, and the two ends of the connecting piece are respectively located below the clearance openings of the adjacent bases;

[0022] The other end of the stationary terminal of the adjacent protector mechanism is located above the clearance notch of the adjacent base;

[0023] One end of the insulating screw is sequentially threaded through the connecting piece, the base, and the stationary terminal to fix the connecting piece, the base, and the stationary terminal together.

[0024] Preferably, the liquid expansion power assembly includes a diaphragm, a diaphragm sheet, a capillary tube, and a temperature sensing bulb;

[0025] The membrane box is disposed on the surface of the base by the fixing component, the diaphragm is disposed inside the membrane box, the temperature sensing bulb is disposed inside the membrane box, and one end of the capillary tube extends into the membrane box and is connected to the temperature sensing bulb.

[0026] Preferably, the fixing component includes a pressure plate and self-tapping screws;

[0027] The number of pressure plates is two, and the two pressure plates are respectively disposed on one side of the membrane box. One end of the self-tapping screw passes through the bottom surface of the membrane box and the surface of the base in sequence, so as to fix the membrane box and the base together.

[0028] Preferably, the lower surface of the base is provided with a mounting through hole, which is used for the bottom end of the lifting rod to be movably inserted.

[0029] Preferably, the mounting assembly includes mounting posts, mounting bolts, and mounting plates;

[0030] The mounting post protrudes from the lower surface of the base around the outer edge of the mounting through hole, and the outer surface of the mounting post is provided with external threads;

[0031] The mounting plate has two mounting holes, which are respectively fitted onto the mounting posts of the adjacent protector mechanism. The mounting bolts are threadedly connected to the mounting posts to fix the mounting plate to the mounting posts.

[0032] One of the above technical solutions has the following beneficial effects:

[0033] 1. Dual Protection: Due to its series electrical connection design, this protector provides a dual protection mechanism. Even if one protector mechanism fails, the other protector mechanism can still continue to operate, ensuring the safety of the circuit.

[0034] 2. Rapid Response: The hydraulic power unit can quickly respond to overheating conditions, moving the lifting rod and cutting off the circuit. This rapid response helps reduce damage to the circuit and protects other equipment from high current surges.

[0035] 3. High-efficiency arc extinguishing: The magnetic blowout arc extinguishing technology can quickly and effectively extinguish the electric arc, protecting the contacts of the contact switch terminal assembly 7 from damage. This extends the service life of the protector and improves its reliability.

[0036] 4. Wide applicability: This protector is designed for power applications that require high DC current to start, such as electrical systems, and can effectively protect against overheating. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a series-type DC high-current protector with magnetic blowout arc extinguishing function according to this utility model;

[0038] Figure 2 This is a top view schematic diagram of a series DC high-current protector with magnetic blowout arc extinguishing function according to this utility model;

[0039] Figure 3 yes Figure 2 A cross-sectional schematic diagram of AA in the middle;

[0040] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle;

[0041] Figure 5 This is a schematic diagram of the internal structure of the hidden base of a series-type DC high-current protector with magnetic blowout arc extinguishing function according to this utility model.

[0042] In the attached diagram: Protector mechanism 1, base 10, mounting base 11, clearance notch 12, mounting through hole 13;

[0043] Mounting components 2, 21, 22, and 23;

[0044] Connecting component 3, connecting electrode 31, insulating screw 32;

[0045] Fixing component 4, pressure plate 41, self-tapping screw 42;

[0046] 5. Hydraulic expansion power unit; 51. Diaphragm box; 52. Diaphragm sheet; 53. Capillary tube; 54. Temperature sensing bulb;

[0047] Lifting rod 6, contact part 61;

[0048] Contact switch terminal assembly 7, moving terminal 71, moving contact 72, stationary terminal 73, stationary contact 74, spring 75, terminal insert 76;

[0049] Magnet 8. Detailed Implementation

[0050] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0053] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0054] A series-connected DC high-current protector with magnetic blowout arc extinguishing function includes at least two sets of protector mechanisms 1, adjacent protector mechanisms 1 are connected in series by mounting components 2, and adjacent protector mechanisms 1 are electrically connected by connecting components 3.

[0055] The protector mechanism 1 includes a base 10. A hydraulic power assembly 5 is provided on the surface of the base 10 by a fixing component 4. A lifting rod 6 is installed at the drive end of the hydraulic power assembly 5. A contact switch terminal assembly 7 is provided at the bottom end of the lifting rod 6. The contact switch terminal assembly 7 is located inside the base 10.

[0056] The hydraulic power assembly 5 is used to control the up and down movement of the lifting rod 6. The up and down movement of the lifting rod 6 is used to control the contact switch terminal assembly 7 to abut or separate from each other, so as to realize the closing or opening of the protector mechanism 1.

[0057] The base 10 has a protruding mounting seat 11 on its outer surface. The mounting seat 11 is located close to the contact switch terminal assembly 7. The mounting seat 11 has a mounting groove, and a magnet 8 is installed in the mounting groove.

[0058] like Figure 1-5 As shown, the working principle of this utility model is as follows:

[0059] First, this protector consists of at least two sets of protector mechanisms 1, with adjacent protector mechanisms 1 connected in series via mounting components 2, and adjacent protector mechanisms 1 electrically connected via mounting components 2, so that each set of protector mechanisms 1 operates independently but is connected in series. When the current flowing through the DC circuit of the protected device passes through this protector, it must pass through each set of protector mechanisms 1 in sequence. This series and electrical connection design provides dual protection; even if one protector mechanism 1 fails and cannot disconnect the circuit, the other protector mechanisms 1 can still continue to operate, ensuring the safety of the entire DC circuit.

[0060] Secondly, specifically, the contact-type switch terminal assembly 7 of the protector mechanism 1 is connected to the DC circuit of the external protected device, and the liquid expansion power assembly 5 is connected to the tested part of the external protected device. When the liquid inside the liquid expansion power assembly 5 senses that the temperature of the tested part of the protected device has reached its boiling point, the liquid expansion power assembly 5 will rapidly expand. The force generated by this expansion pushes the lifting rod 6 to gradually move downwards. The downward movement of the lifting rod 6 causes it to disconnect from the contact-type switch terminal assembly 7, separating the previously contacting switch contacts, thereby cutting off the current in the DC circuit and preventing the protected device from operating. This separation action is rapid and reliable, and can respond to overheating situations in a very short time.

[0061] Since the contacts of the contact switch terminal assembly 7 will generate an electric arc during the separation or re-connection process, in order to protect the contact switch terminal assembly 7 from damage by the electric arc, the magnet 8 on the outer surface of the base 10 forms an arc-extinguishing magnetic field, which can generate a strong blowing force on the electric arc, causing it to be quickly stretched and cooled, and finally extinguished, so as to magnetically blow out the arc generated by the contact switch terminal assembly 7 during contact or separation.

[0062] Tests have shown that this protector is designed to handle a high current of 45A.

[0063] Therefore, the beneficial effects of this utility model are as follows:

[0064] 1. Dual Protection: Due to the series electrical connection design, this protector provides a dual protection mechanism. Even if one protector mechanism 1 fails, the other protector mechanisms 1 can still continue to operate, ensuring the safety of the circuit.

[0065] 2. Rapid Response: The hydraulic power unit 5 can quickly respond to overheating conditions, moving the lifting rod 6 and cutting off the circuit. This rapid response helps reduce damage to the circuit and protects other equipment from high current surges.

[0066] 3. High-efficiency arc extinguishing: The magnetic blowout arc extinguishing technology can quickly and effectively extinguish the electric arc, protecting the contacts of the contact switch terminal assembly 7 from damage. This extends the service life of the protector and improves its reliability.

[0067] 4. Wide applicability: This protector is designed for power applications that require high DC current to start, such as electrical systems, and can effectively protect against overheating.

[0068] In summary, this series-type DC high-current protector with magnetic blowout arc extinguishing function has advantages such as fast response, dual protection, efficient arc extinguishing, and wide applicability, providing strong protection for the safe operation of power systems and the development of industrial automation.

[0069] To further explain, the contact switch terminal assembly 7 includes a contact switch terminal subassembly, which includes a moving terminal 71, a moving contact 72, a stationary terminal 73, a stationary contact 74, and a spring 75.

[0070] The middle part of the upper surface of the moving terminal 71 is connected to the bottom end of the lifting rod 6, and the middle part of the lower surface of the moving terminal 71 abuts against the base 10 with the spring 75.

[0071] The moving terminal 71 has moving contacts 72 at both ends of its upper surface;

[0072] The number of stationary terminals 73 is two, and the two stationary terminals 73 are respectively disposed at both ends of the moving contact 72, and the two stationary terminals 73 are respectively located above the moving contact 72. Each of the two stationary terminals 73 is provided with a stationary contact 74 at the end closest to the moving terminal 71, and the stationary contact 74 is disposed opposite to the moving contact 72.

[0073] One of the stationary contacts 74 is electrically connected to one end of the stationary contact 74 of the adjacent protector mechanism 1 via the connecting assembly 3.

[0074] Another stationary contact 74 has a terminal insert 76 extending through the base 10 at one end. The terminal insert 76 is used for connecting external electronic components.

[0075] Specifically, such as Figure 3-5 As shown, when the temperature of the measured part of the protected device does not reach the boiling point of the liquid inside the liquid expansion power assembly 5, the liquid expansion power assembly 5 maintains a normal state, the lifting rod 6 is stationary, and the moving terminal 71 is supported by the spring 75. The presence of the spring 75 ensures stable contact between the moving terminal 71 and the stationary terminal 73. When the temperature of the measured part of the protected device reaches the boiling point of the liquid inside the liquid expansion power assembly 5, the liquid expansion power assembly 5 is activated. The liquid expansion power assembly 5 expands rapidly, pushing the lifting rod 6 downward. At the same time, the descent of the lifting rod 6 compresses the spring 75 located below the moving terminal 71. As the moving terminal 71 descends, the contact between the moving contact 72 and the stationary contact 74 gradually decreases until they are completely separated. This separation is rapid, which helps to reduce the generation and duration of electric arc.

[0076] Furthermore, two stationary contacts 74 are respectively connected to the two ends of the moving contact 72, and the other end of one stationary contact 74 is electrically connected in series with the adjacent protector mechanism 1 via the connecting assembly 3. This series design ensures that the current must pass through each group of protector mechanisms 1 sequentially as it flows through the entire protector. The other end of the other stationary contact 74 extends out of the base 10 and is connected to a terminal insert 76. The terminal insert 76 provides a connection point for external electronic components, allowing the protector to be easily integrated into larger DC circuits.

[0077] To further clarify, the number of the contact switch terminal assembly is two sets;

[0078] The outer surface of the lifting rod 6 is provided with two abutting parts 61, and the two abutting parts 61 are respectively arranged opposite to the two sets of contact switch terminal sub-assemblies;

[0079] The outer surface of the base 10 is provided with two mounting seats 11. The two mounting seats 11 are respectively located on both sides of the two sets of contact switch terminal assemblies 7, and the two mounting seats 11 are arranged opposite each other along the moving direction perpendicular to the lifting rod 6. Both mounting seats 11 are provided with mounting grooves, and magnets 8 are installed in both mounting grooves. The arc extinguishing magnetic fields of the two magnets 8 have overlapping areas, and the two sets of contact switch terminal assemblies (7) are located between the two magnets.

[0080] like Figure 2 As shown, in a series-type DC high-current protector with magnetic blowout arc extinguishing function, when the number of contact switch terminal subassemblies is increased to two sets, the design of the lifting rod 6 is also adjusted accordingly to accommodate this configuration of multiple switch subassemblies.

[0081] Because there are two sets of contact switch terminal assemblies, the number of arcs generated when they separate increases accordingly. To extinguish these arcs more effectively, the magnet 8 on the outer surface of the base 10 may require a stronger magnetic field to generate sufficient blowing force.

[0082] Fortunately, because the two sets of contact switch terminal subassemblies are arranged close to each other and inside the base 10, the arcs they generate will be close to each other, making them more susceptible to the same arc-extinguishing magnetic field. Therefore, by optimizing the design and layout of the magnets 8, the two magnets 8 are positioned on opposite sides of the contact switch terminal assembly 7, meaning the two sets of contact switch terminal subassemblies are located in the overlapping magnetic field region of the two magnets 8. This further enhances the effect of the arc-extinguishing magnetic field, ensuring that the arc can be extinguished quickly and completely.

[0083] To further explain, the connecting assembly 3 includes a connecting electrode 31 and an insulating screw 32;

[0084] The base 10 has a clearance notch 12, and the two ends of the connecting piece 31 are respectively located below the clearance notch 12 of the adjacent base 10;

[0085] The other end of the stationary terminal 73 of the adjacent protector mechanism 1 is located above the clearance notch 12 of the adjacent base 10;

[0086] One end of the insulating screw 32 is sequentially threaded through the connecting piece 31, the base 10, and the stationary terminal 73, so that the connecting piece 31, the base 10, and the stationary terminal 73 are fixedly connected.

[0087] Specifically, such as Figure 3-5 As shown, clearance notches 12 are provided on the base 10. These clearance notches 12 are designed to accommodate the connecting piece 31 for electrical connection and ensure that the connecting piece 31 can be smoothly connected to the stationary terminal 73 of the adjacent base 10. The location of the clearance notches 12 is carefully chosen to ensure that the connecting piece 31 is located below the clearance notch 12 of the adjacent base 10, while the other end of the stationary terminal 73 is located above the clearance notch 12. Insulating screws 32 are used to fix the connecting piece 31, the base 10, and the stationary terminal 73 together, while ensuring the stability and safety of the electrical connection. This connection method is not only simple and reliable, but also easy to maintain and replace. When it is necessary to replace the contact switch terminal subassembly, the connecting piece 31, the base 10, and the stationary terminal 73 can be easily separated by simply loosening the insulating screws 32.

[0088] To further explain, the liquid expansion power assembly 5 includes a diaphragm 51, a diaphragm 52, a capillary tube 53, and a temperature sensing bulb 54;

[0089] The membrane box 51 is disposed on the surface of the base 10 by the fixing component 4, the diaphragm 52 is disposed inside the membrane box 51, the temperature sensing bulb 54 is disposed inside the membrane box 51, and one end of the capillary tube 53 passes through the membrane box 51 and is connected to the temperature sensing bulb 54.

[0090] Specifically, such as Figure 3 As shown, the temperature sensing bulb 54 is disposed inside the diaphragm box 51 and connected to one end of the capillary tube 53. The temperature sensing bulb 54 can sense the temperature of the measured part of the protected device through the capillary tube 53 and generate corresponding pressure changes according to the temperature changes. When the temperature of the measured part of the protected device rises to the boiling point of the working fluid inside the temperature sensing bulb 54, the working fluid inside the temperature sensing bulb 54, such as Freon, expands due to heat, generating pressure. This pressure is transmitted to the diaphragm 52 inside the diaphragm box 51.

[0091] The diaphragm 52 is a key component within the diaphragm housing 51. It deforms under pressure transmitted from the temperature sensing bulb 54. The degree of deformation of the diaphragm 52 is proportional to the pressure change within the temperature sensing bulb 54. When the diaphragm 52 deforms under pressure, it pushes the connected lifting rod 6, thereby triggering the operation of the contact switch terminal assembly.

[0092] To further explain, the fixing component 4 includes a pressure plate 41 and a self-tapping screw 42;

[0093] There are two pressure plates 41, and the two pressure plates 41 are respectively disposed on one side of the membrane box 51. One end of the self-tapping screw 42 passes through the bottom surface of the membrane box 51 and the surface of the base 10 in sequence, so that the membrane box 51 and the base 10 are fixedly connected.

[0094] Specifically, such as Figure 1-3 As shown, there are two pressure plates 41, each located on one side of the diaphragm box 51. By adjusting the tightening of the self-tapping screws 42, a tight contact and stable connection between the diaphragm box 51 and the base 10 can be ensured. This design provides a balanced fixing force, preventing the hydraulic power assembly 5 from shaking or shifting during operation.

[0095] To further explain, the lower surface of the base 10 is provided with a mounting through hole 13, which is used for the bottom end of the lifting rod 6 to be movably inserted.

[0096] Specifically, such as Figure 3 As shown, a mounting through hole 13 is specially provided on the lower surface of the base 10. The design of this mounting through hole 13 is to allow the bottom end of the lifting rod 6 to move freely through it, thereby realizing the up and down movement of the lifting rod 6 inside the base 10, and also to facilitate personnel to directly observe whether the protector is triggered or to manually reset it.

[0097] To further explain, the mounting assembly 2 includes a mounting post 21, mounting bolts 22, and mounting plate 23;

[0098] The lower surface of the base 10 is provided with a mounting post 21 protruding around the outer edge of the mounting through hole 13, and the outer surface of the mounting post 21 is provided with external threads;

[0099] The mounting plate 23 has two mounting holes, which are respectively fitted onto the mounting posts 21 of the adjacent protector mechanism 1. The mounting bolts 22 are threadedly connected to the mounting posts 21 so that the mounting plate 23 is fixedly connected to the mounting posts 21.

[0100] Specifically, such as Figure 1 As shown, by connecting the mounting components 2, multiple protector mechanisms 1 can form an integral structure. This connection method is not only simple and reliable, but also ensures the relative position stability between each protector mechanism 1, avoiding displacement or shaking during operation.

[0101] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A series-type DC high-current protector with magnetic blowout arc extinguishing function, characterized in that, It includes at least two sets of protector mechanisms (1), adjacent protector mechanisms (1) are connected in series by mounting components (2), and adjacent protector mechanisms (1) are electrically connected by connecting components (3); The protector mechanism (1) includes a base (10), on which a hydraulic power assembly (5) is provided by a fixing component (4), a lifting rod (6) is installed at the drive end of the hydraulic power assembly (5), and a contact switch terminal assembly (7) is provided at the bottom end of the lifting rod (6), and the contact switch terminal assembly (7) is located inside the base (10). The hydraulic power assembly (5) is used to control the up and down movement of the lifting rod (6), and the up and down movement of the lifting rod (6) is used to control the contact switch terminal assembly (7) to abut or separate from each other, so as to realize the closing or opening of the protector mechanism (1). The base (10) has a protruding mounting seat (11) on its outer surface. The mounting seat (11) is located close to the contact switch terminal assembly (7). The mounting seat (11) has a mounting groove, and a magnet (8) is installed in the mounting groove.

2. A series-type DC high-current protector with magnetic blowout arc extinguishing function according to claim 1, characterized in that, The contact switch terminal assembly (7) includes a contact switch terminal subassembly, which includes a moving terminal (71), a moving contact (72), a stationary terminal (73), a stationary contact (74), and a spring (75). The middle part of the upper surface of the moving terminal (71) is connected to the bottom end of the lifting rod (6), and the middle part of the lower surface of the moving terminal (71) abuts against the base (10) with the spring (75). The moving terminal (71) has moving contacts (72) at both ends of its upper surface. The number of stationary terminals (73) is two. The two stationary terminals (73) are respectively disposed at both ends of the moving contact (72), and the two stationary terminals (73) are respectively located above the moving contact (72). Each of the two stationary terminals (73) has a stationary contact (74) at the end closest to the moving terminal (71). The stationary contact (74) is disposed opposite to the moving contact (72). One of the stationary contacts (74) is electrically connected to one end of the stationary contact (74) of the adjacent protector mechanism (1) via the connecting assembly (3); Another stationary contact (74) extends through the base (10) and is connected to a terminal insert (76), which is used for connecting external electronic components.

3. A series-type DC high-current protector with magnetic blowout arc extinguishing function according to claim 2, characterized in that, The number of contact switch terminal sub-assemblies is two sets; The outer surface of the lifting rod (6) is provided with two abutting parts (61), and the two abutting parts (61) are respectively arranged opposite to the two sets of contact switch terminal sub-assemblies; The outer surface of the base (10) is provided with two mounting seats (11). The two mounting seats (11) are located on both sides of the two sets of contact switch terminal assemblies (7), and the two mounting seats (11) are arranged opposite each other along the moving direction perpendicular to the lifting rod (6). The two mounting seats (11) are provided with mounting grooves, and the magnets (8) are installed in the two mounting grooves. The arc-extinguishing magnetic fields of the two magnets (8) have overlapping areas, and the two sets of contact switch terminal assemblies (7) are located between the two magnets (8).

4. A series-type DC high-current protector with magnetic blowout arc extinguishing function according to claim 2, characterized in that, The connecting assembly (3) includes a connecting electrode (31) and an insulating screw (32); The base (10) has a clearance opening (12), and the two ends of the connecting piece (31) are respectively located below the clearance opening (12) of the adjacent base (10); The other end of the stationary terminal (73) of the adjacent protector mechanism (1) is located above the clearance notch (12) of the adjacent base (10); One end of the insulating screw (32) is sequentially threaded through the connecting piece (31), the base (10), and the stationary terminal (73) to fix the connecting piece (31), the base (10), and the stationary terminal (73) together.

5. A series-type DC high-current protector with magnetic blowout arc extinguishing function according to claim 1, characterized in that, The liquid expansion power assembly (5) includes a diaphragm (51), a diaphragm (52), a capillary (53), and a temperature sensing bulb (54). The membrane box (51) is disposed on the surface of the base (10) by the fixing component (4), the diaphragm (52) is disposed inside the membrane box (51), the temperature sensing bulb (54) is disposed inside the membrane box (51), and one end of the capillary (53) passes through the membrane box (51) and is connected to the temperature sensing bulb (54).

6. A series-type DC high-current protector with magnetic blowout arc extinguishing function according to claim 5, characterized in that, The fixing component (4) includes a pressure plate (41) and self-tapping screws (42); There are two pressure plates (41), and the two pressure plates (41) are respectively set on one side of the membrane box (51). One end of the self-tapping screw (42) passes through the bottom surface of the membrane box (51) and the surface of the base (10) in sequence, so that the membrane box (51) and the base (10) are fixedly connected.

7. A series-type DC high-current protector with magnetic blowout arc extinguishing function according to claim 6, characterized in that, The lower surface of the base (10) is provided with an installation through hole (13), which is used for the bottom end of the lifting rod (6) to be movably inserted.

8. A series-type DC high-current protector with magnetic blowout arc extinguishing function according to claim 7, characterized in that, The mounting assembly (2) includes a mounting post (21), mounting bolts (22), and mounting plate (23); The lower surface of the base (10) protrudes around the outer edge of the mounting through hole (13) and the mounting post (21) is provided with an external thread on the outer surface of the mounting post (21); The mounting plate (23) has two mounting holes, which are respectively fitted onto the mounting posts (21) of the adjacent protector mechanism (1). The mounting bolts (22) are threadedly connected to the mounting posts (21) so that the mounting plate (23) is fixedly connected to the mounting posts (21).

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