A surge backup protector

Abstract

This utility model discloses a surge backup protector, which includes a housing, a first conductive plate and a second conductive plate disposed at both ends thereon. The housing contains a discharge tube and graphite conductive blocks. The discharge tube has conductive portions at both ends, and the graphite conductive blocks are disposed at both ends of the discharge tube. A clamping part is provided within the housing, acting on one of the graphite conductive blocks to tightly press the other graphite conductive block against the first conductive plate, creating a clamping force between the two graphite conductive blocks to hold the conductive portions. Using graphite conductive blocks as static contacts and current transmission elements, their excellent conductivity reduces contact resistance, decreases power loss, reduces the risk of overheating and contact adhesion, and extends product life. Graphite conductive blocks exhibit stable high-temperature performance, are not easily melted or oxidized, are suitable for high-temperature environments, and have good wear resistance, ensuring reliability during frequent opening and closing operations.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a surge backup protector. Background Technology

[0002] Backup protectors are indispensable devices for lightning protection of electronic equipment, formerly known as "surge arresters" or "overvoltage protectors." Their function is to divert powerful lightning currents to the ground, protecting equipment or systems from damage caused by lightning surges. Backup protectors mainly consist of: discharge gaps, gas discharge tubes, varistors, suppression diodes, and choke coils.

[0003] In existing technologies, backup protectors typically use tungsten-copper alloy as the stationary contact material. However, in practical applications, tungsten-copper alloy stationary contacts have certain limitations. When the instantaneous current carried by the stationary contact exceeds its withstand limit, it will accelerate its wear, thereby shortening the service life of the backup protector. Furthermore, the high temperatures generated when subjected to high current or prolonged energization can cause the tungsten-copper alloy stationary contacts to melt and may cause them to stick to the moving contacts. Simultaneously, high temperatures can exacerbate the oxidation process of the stationary contacts, leading to increased contact resistance and further causing more serious heating problems. Therefore, the applicant has made a beneficial design and found a solution to the above problems. The technical solution described below arose from this background. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the traditional backup protector design and provide a product that extends service life, reduces manufacturing costs, and improves reliability.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A surge backup protector includes a housing and a first conductive plate and a second conductive plate disposed at both ends thereon. The housing contains a discharge tube and graphite conductive blocks. The discharge tube has conductive portions at both ends, and the graphite conductive blocks are disposed at both ends of the discharge tube. The housing contains a clamping portion that acts on one of the graphite conductive blocks, tightly pressing the other graphite conductive block against the first conductive plate, and causing the two graphite conductive blocks to form a clamping force on the conductive portions.

[0007] Preferably, the housing is provided with an operating mechanism, which has two moving contacts, and the moving contacts are electrically connected to the second conductive plate via a flexible connecting wire.

[0008] Preferably, the housing is further provided with an electromagnetic trip unit, one end of which is electrically connected to the first conductive plate.

[0009] Preferably, the housing is provided with a varistor, one end of which is electrically connected to one of the conductive parts, and the other end of which is electrically connected to the other end of the electromagnetic trip unit.

[0010] Preferably, one side of the pressing part is provided with a plurality of equally spaced protrusions, and the protrusions are provided with a plurality of elastic clamping parts, one of which acts on the varistor to press the varistor against the side wall of the housing.

[0011] Preferably, one of the graphite conductive blocks has an abutment portion on one side, located on the movement trajectory of the moving contact.

[0012] Preferably, the first conductive plate and the second conductive plate are provided with a liftable pressure plate, and the first conductive plate and the second conductive plate are provided with fastening screws and threadedly connected to the pressure plate.

[0013] Beneficial effects:

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention utilizes graphite conductive blocks as stationary contacts and current transmission elements. Their excellent conductivity effectively reduces contact resistance and power loss. Simultaneously, less heat is generated between contacts, reducing the risk of overheating, preventing contact sticking, and extending product lifespan. Graphite conductive blocks exhibit stable performance at high temperatures, are not easily melted or oxidized, and are particularly suitable for high-temperature environments. Their good wear resistance ensures minimal wear during frequent opening and closing operations, further extending product lifespan. Furthermore, high conductivity and low contact resistance result in a smaller arc when breaking the circuit, reducing arc damage to contacts and the risk of fire. Additionally, using graphite as the stationary contact effectively reduces manufacturing costs. In summary, this solution, by employing graphite conductive blocks, offers advantages such as improved conductivity, enhanced reliability, adaptability to high-temperature environments, improved wear resistance, arc suppression, and cost reduction. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a surge backup protector according to the present invention;

[0017] Figure 2 This is a front view of a surge backup protector according to the present invention;

[0018] The correspondence between the labels and component names in the attached figures is as follows:

[0019] Reference numerals: 1. Housing; 2. First conductive plate; 3. Second conductive plate; 4. Discharge tube; 5. Graphite conductive block; 6. Operating mechanism; 7. Electromagnetic trip unit; 8. Varistor; 9. Pressure plate; 11. Pressing part; 12. Protrusion; 13. Clamping part; 41. Conductive part; 51. Contact part; 61. Moving contact; 91. Fastening screw. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0023] Reference example Figure 1 , Figure 2 A surge backup protector includes a housing 1 and a first conductive plate 2 and a second conductive plate 3 disposed at both ends thereon. The housing 1 is provided with a discharge tube 4 and a graphite conductive block 5. The discharge tube 4 is provided with conductive parts 41 at both ends. The graphite conductive blocks 5 are disposed at both ends of the discharge tube 4. The housing 1 is provided with a pressing part 11, which acts on one of the graphite conductive blocks 5, tightly pressing the other graphite conductive block 5 against the first conductive plate 2, and causing the two graphite conductive blocks 5 to form a clamping force on the conductive part 41.

[0024] Using graphite conductive block 5 as the stationary contact and current transmission element, its excellent conductivity effectively reduces contact resistance and power loss. Simultaneously, less heat is generated between the contacts, reducing the risk of overheating, preventing contact sticking, and extending product lifespan. Graphite conductive block 5 exhibits stable performance at high temperatures, is not easily melted or oxidized, and is particularly suitable for high-temperature environments. Its good wear resistance ensures it is not easily worn during frequent opening and closing operations, further extending product lifespan. Furthermore, high conductivity and low contact resistance result in a smaller arc when breaking the circuit, reducing arc damage to the contacts and the risk of fire. At the same time, using graphite as the stationary contact effectively reduces manufacturing costs. In summary, this solution, by using graphite conductive block 5, offers advantages such as improved conductivity, enhanced reliability, adaptability to high-temperature environments, improved wear resistance, arc suppression, and cost reduction.

[0025] It is worth mentioning that the housing 1 is provided with an operating mechanism 6, which has two moving contacts 61. The moving contacts 61 are electrically connected to the second conductive plate 3 through a flexible connecting wire. The multiple moving contacts 61 increase the contact area, thereby reducing the contact resistance and improving the conductivity. The dispersed moving contacts 61 help to disperse the heat generated by the current, making the heat distribution more uniform, thereby reducing the temperature rise of the contact point and further reducing oxidation and melting caused by overheating. The flexible connecting wire is a copper braided wire.

[0026] It is worth mentioning that an electromagnetic trip unit 7 is also provided inside the housing 1, and one end of the electromagnetic trip unit 7 is electrically connected to the first conductive plate 2.

[0027] It is worth mentioning that the housing 1 is equipped with a varistor 8. One end of the varistor 8 is electrically connected to one of the conductive parts 41, and the other end of the varistor 8 is electrically connected to the other end of the electromagnetic trip unit 7. When the voltage in the circuit is within the normal range, the varistor 8 is in a high-resistance state and hardly conducts electricity, so it has no effect on the circuit. Once the voltage exceeds the set threshold (usually the protection voltage), the resistance value of the varistor 8 drops rapidly, clamping the overvoltage to a safe level, thereby protecting the equipment from overvoltage impact. The varistor 8 can absorb surge energy and conduct the overcurrent to the ground wire to avoid damage to the equipment caused by surge voltage.

[0028] It is worth mentioning that a number of equally spaced protrusions 12 are provided on one side of the pressing part 11. The protrusions 12 are provided with a number of elastic clamping parts 13. One of the clamping parts 13 acts on the varistor 8 to press the varistor 8 against the side wall of the housing 1. The protrusions 12 have the function of increasing the creepage distance. The two graphite conductive blocks 5 and the discharge tube 4 are arranged between the pressing part 11 and the first conductive plate 2 in an interference fit manner.

[0029] It is worth mentioning that one of the graphite conductive blocks 5 has a contact part 51 on one side, which is located on the moving trajectory of the moving contact 61. The contact part 51 and the moving contact 61 abut against each other, and the current on the moving contact 61 is conducted to the contact part 51. The current flows through the graphite conductive block 5 with the contact part 51, the conductive part 41, the discharge tube 4, the conductive part 41, the graphite conductive block 5 and the first conductive plate 2 in sequence, thereby making the circuit conductive. When the voltage in the circuit exceeds the breakdown voltage of the gas discharge tube 4, the gas in the tube is ionized to form a conductive channel, which quickly discharges the overvoltage to the ground. This discharge mechanism can effectively reduce the impact of surge voltage and protect the equipment from damage.

[0030] It is worth mentioning that the first conductive plate 2 and the second conductive plate 3 are provided with a liftable pressure plate 9. The first conductive plate 2 and the second conductive plate 3 are provided with fastening screws 91 and are threadedly connected to the pressure plate 9. As the fastening screws 91 are rotated, the pressure plate 9 is driven to move up and down. The pressure plate 9 and the first conductive plate 2 or the second conductive plate 3 form a clamping force, thereby pressing the wire between the pressure plate 9 and the first conductive plate 2 or the second conductive plate 3.

[0031] The above design scheme can enable the product to achieve the advantages of extended service life, reduced manufacturing costs, and improved reliability.

[0032] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A surge backup protector, comprising a housing (1), and a first conductive plate (2) and a second conductive plate (3) disposed at both ends thereof, characterized in that: The housing (1) is provided with a discharge tube (4) and a graphite conductive block (5). The discharge tube (4) has conductive parts (41) at both ends. The graphite conductive block (5) is disposed at both ends of the discharge tube (4). The housing (1) is provided with a pressing part (11), which acts on one of the graphite conductive blocks (5) to tightly press the other graphite conductive block (5) against the first conductive plate (2) and make the two graphite conductive blocks (5) form a clamping force on the conductive part.

2. The surge backup protector according to claim 1, characterized in that: The housing (1) is provided with an operating mechanism (6), and the operating mechanism (6) is provided with two moving contacts (61), which are electrically connected to the second conductive plate (3) through a flexible connecting wire.

3. The surge backup protector according to claim 1, characterized in that: The housing (1) is also provided with an electromagnetic trip unit (7), one end of which is electrically connected to the first conductive plate (2).

4. The surge backup protector according to claim 3, characterized in that: The housing (1) is provided with a varistor (8), one end of which is electrically connected to one of the conductive parts (41), and the other end of which is electrically connected to the other end of the electromagnetic trip unit (7).

5. The surge backup protector according to claim 4, characterized in that: The pressing part (11) has several equally spaced protrusions (12) on one side. The protrusions (12) have multiple elastic clamping parts (13). One of the clamping parts (13) acts on the varistor (8) to press the varistor (8) against the side wall of the housing (1).

6. The surge backup protector according to claim 2, characterized in that: One of the graphite conductive blocks (5) has an abutment part (51) on one side, and is located on the movement trajectory of the moving contact (61).

7. The surge backup protector according to claim 1, characterized in that: The first conductive plate (2) and the second conductive plate (3) are provided with liftable pressure plates (9), and the first conductive plate (2) and the second conductive plate (3) are provided with fastening screws (91) and are threaded to the pressure plates (9).

Images