CN211606087U

CN211606087U - SPD surge protector

Info

Publication number: CN211606087U
Application number: CN202020650486.4U
Authority: CN
Inventors: 倪迎松
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2020-09-29
Anticipated expiration: 2030-04-26

Abstract

The utility model relates to a surge protector technical field specifically is a SPD surge protector, including connecting the steelframe, a plurality of installation U type groove has been seted up to the inside of connecting the steelframe, the sliding tray has been seted up at the rear portion of connecting the steelframe, it has the input line to peg graft at reserve protector's top, there is the metal base bottom of SPD body through bolted connection, it has a plurality of output line to peg graft in the bottom of metal base, the inside of metal base is provided with contact mechanism. This SPD surge protector, through setting traditional SPD bottom to the electrically conductive base of metal, and the switch board itself is that iron or steel that belong to good conductor are the material production, utilize the switch board to have good electric conductivity characteristics, the base material of SPD is the conductor, the base design becomes the earthing terminal of SPD, directly reduces the length of traditional earth connection, reduces the voltage drop on the circuit to fine protective apparatus and the personal safety improve the security performance of whole SPD.

Description

SPD surge protector

Technical Field

The utility model relates to a surge protector technical field specifically is a SPD surge protector.

Background

Surge Protectors (SPDs) function to discharge lightning into the ground, thereby protecting equipment and personal safety. The protection capability of the surge protector is directly related to the product performance and the installation and connection mode, and when surge current or voltage is suddenly generated in an electric loop or a communication line due to external interference, the surge protector can conduct and shunt in a very short time, so that the damage of surge to the line, equipment and a person is avoided.

At present, in the process of installing SPDs, the regulations of GB/T21431-2015 'technical Specification for detecting lightning protection devices for buildings' section 5.8.1.8 cannot be met: the sum of the lengths of the leads on both sides of the SPD is preferably not more than 0.5 m. Moreover, the wire grooves are generally arranged in the installation process, and the original distance of 1m is changed into 2m or longer, so that the SPD cannot effectively protect equipment and personal safety. In view of this, we propose an SPD surge protector.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a SPD surge protector to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a SPD surge protector, includes the connection steelframe, a plurality of installation U type groove has been seted up to the inside of connecting the steelframe, the sliding tray has been seted up to the rear portion of connecting the steelframe, the surface joint of connecting the steelframe has reserve protector, reserve protector's bottom has the SPD body through bolted connection, it has the input line to peg graft at reserve protector's top, there is the metal base bottom of SPD body through bolted connection, it has a plurality of output line to peg graft in the bottom of metal base, the inside of metal base is provided with contact mechanism.

Preferably, the front part of the SPD body is spliced with a plurality of splicing pieces, slots are formed in the SPD body and the metal seat, and the inner walls of the slots are clamped with splicing sleeves.

Preferably, the metal base is made of one of copper or iron, and the inserting sleeve is made of a copper sheet.

Preferably, the contact mechanism comprises a steel frame contact plate, a sliding block is welded at the bottom of the steel frame contact plate, a first spring is welded at the bottom of the sliding block, a clamping groove is formed in the front of the sliding block, the upper surface of the steel frame contact plate and the bottom of the connecting steel frame are in mutual contact, a movable cavity is formed in the SPD body, and a protection mechanism is arranged in the movable cavity.

Preferably, the protection mechanism comprises a limiting plate, a connecting plate is welded to the front portion of the limiting plate, a limiting rod is welded to the front portion of the connecting plate, the surface of the limiting rod is connected to the inside of the SPD body in a sliding mode, a sliding contact piece is welded to the top of the connecting plate, the right side of the sliding contact piece penetrates through the SPD body and is in contact with the front surface of the connecting steel frame, a limiting spring is welded to the front portion of the sliding contact piece, and the limiting spring is located inside the SPD body.

Preferably, the surface welding of plug bush has the connection piece, the right side sliding connection of connection piece is in the bottom of limiting plate.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the SPD surge protector is characterized in that the bottom of the traditional SPD is set to be a metal conductive base, the power distribution cabinet is made of iron or steel which belongs to a good conductor, the power distribution cabinet is characterized by good electrical conductivity, the power distribution cabinet can be regarded as an extension body of a grounding body, the base of the SPD is made of the conductor, the base is designed to be a grounding end of the SPD, when the metal base and the SPD body are fixed, a steel frame contact plate is directly contacted with a connecting steel frame in a laminating manner under the pushing of a spring, the metal base and the connecting steel frame are ensured to be directly contacted, and then the metal base is conducted to the surface of a control box through the connecting steel frame, copper materials can be well saved, lead wires of the SPD can be directly saved, the distance between an on-site surge lightning protection module (SPD) and the grounding terminal is less than 0.5 meter and more than 2 meters, and the metal, the standard is reached, the voltage drop on the circuit is reduced, thereby well protecting equipment and personal safety and improving the safety performance of the whole SPD.

2. This SPD surge protector, through installing the reserve surge protector of the integral type on connecting the steelframe, when reserve surge protector slips into and connects the steelframe, the sliding contact piece that contacts with it receives the extrusion and pops out the steelframe contact plate, directly pushes up on connecting the steelframe, and the sliding contact piece also contacts with connecting the steelframe simultaneously to further make the contact effect reach the best, guarantee the perfect contact connection of earth connection.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the connection structure of the SPD body and the backup protector;

FIG. 3 is a schematic view of a contact mechanism according to the present invention;

fig. 4 is a schematic view of a protection mechanism of the present invention;

fig. 5 is a schematic diagram of the SPD connection circuit according to the present invention.

In the figure: 1. installing a U-shaped groove; 2. a sliding groove; 3. connecting a steel frame; 4. an SPD body; 5. a backup protector; 6. an input line; 7. an output line; 8. a contact mechanism; 81. a steel frame contact plate; 82. a slider; 83. a first spring; 84. a card slot; 85. a movable cavity; 9. a protection mechanism; 91. a limiting plate; 92. a restraining spring; 93. a limiting rod; 94. a sliding contact piece; 95. a connecting plate; 10. a metal base; 11. a plug-in sheet; 12. a slot; 13. a plug bush; 14. and (7) connecting the sheets.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating 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 the present invention, "a plurality" means two or more unless specifically limited otherwise.

Example 1

The utility model provides a SPD surge protector, as shown in fig. 1-3, including connecting steelframe 3, a plurality of installation U type groove 1 has been seted up to the inside of connecting steelframe 3, sliding tray 2 has been seted up to the rear portion of connecting steelframe 3, the surface joint of connecting steelframe 3 has reserve protector 5, there is SPD body 4 bottom of reserve protector 5 through bolted connection, it has input line 6 to peg graft at reserve protector 5's top, there is metal base 10 bottom of SPD body 4 through bolted connection, it has a plurality of output line 7 to peg graft in the bottom of metal base 10, the inside of metal base 10 is provided with contact mechanism 8.

In this embodiment, the front portion of the SPD body 4 is inserted with a plurality of insertion pieces 11, the insertion slots 12 are formed in the SPD body 4 and the metal base 10, the inner walls of the insertion slots 12 are all clamped with insertion sleeves 13, and the insertion sleeves 13 provide good electrical contact.

Furthermore, the metal base 10 is made of one of copper or iron, the inserting sleeve 13 is made of copper sheet, and the copper and iron materials can well conduct the function of a conducting lead, so that the contact resistance can be reduced to the lowest degree, and a good conducting effect is achieved.

Further, the contact mechanism 8 comprises a steel frame contact plate 81, a sliding block 82 is welded at the bottom of the steel frame contact plate 81, a first spring 83 is welded at the bottom of the sliding block 82, a clamping groove 84 is formed in the front of the sliding block 82, the upper surface of the steel frame contact plate 81 and the bottom of the connecting steel frame 3 are in mutual contact, a movable cavity 85 is formed in the SPD body 4, a protection mechanism 9 is arranged in the movable cavity 85, when the whole SPD body 4 is installed on the connecting steel frame 3, a sliding contact piece 94 is extruded to retreat, the steel frame contact plate 81 and a limiting plate 91 are tripped, the spring action is exerted, the steel frame contact plate 81 and the connecting steel frame 3 are in mutual contact, meanwhile, the sliding contact piece 94 also has contact with the connecting steel frame 3, and.

Example 2

As shown in fig. 4, the protection mechanism 9 includes a limiting plate 91, a connecting plate 95 is welded to the front portion of the limiting plate 91, a limiting rod 93 is welded to the front portion of the connecting plate 95, the surface of the limiting rod 93 is slidably connected to the inside of the SPD body 4, a sliding contact piece 94 is welded to the top portion of the connecting plate 95, the right side of the sliding contact piece 94 penetrates through the SPD body 4 and is in contact with the front surface of the connecting steel frame 3, a limiting spring 92 is welded to the front portion of the sliding contact piece 94, and the limiting spring 92 is located inside the SPD.

In this embodiment, the skin weld of grafting cover 13 has connection piece 14, and the right side sliding connection of connection piece 14 is in the bottom of limiting plate 91, and connection piece 14 is whole similar a wire and is connected with metal base 10, and a direct connection earth connection of avoiding that can be fine has reduced the connection length of earth connection, reduces the voltage drop, improves holistic surge protector's security performance.

Examples of the experiments

As shown in fig. 5, the length of the L1 connection line is greatly affected by the installation location and the wiring process. The SPD is located close to the power point on the electrical diagram, but not necessarily in the field, and the actual installation location may be far from the power point, making L1 become long. The length of L1 may be 2m when the wiring process requires a horizontal, vertical, or horizontal, wire. According to the specification of GB/T21431-2015 'detection technical Specification for lightning protection devices for buildings' 5.8.1.5, U is the voltage generated on the leads at two ends of SPD, and the voltage can be 1kV/m (8/20 mus and 20 kA) when outdoor wires enter the buildings. "this is used to estimate the voltage drop at L1 as 2 KV. The 2KV voltage drop is added on the line of the surge protector, and the protection effect of the SPD on the circuit is seriously influenced.

As L2 in fig. 5, the length of L2 is greatly affected by the installation manner and the installation space, and the installation manner can be divided into upper and lower installation and left and right installation. The length of the upper and lower installation L2 can be shortened to a small state, but when the upper and lower installation is carried out, the space for the upper and lower installation and the position for fixing the base are required, the requirements on the installation wiring process are high, the conditions for the upper and lower installation cannot be met on most construction sites, and only left and right installation can be selected. The length of L2 can reach 0.5 meter when the installation is left and right, and the voltage drop algorithm on L1 can obtain: the voltage drop across L2 is 0.5 KV. The voltage drop of 0.5KV is added on the line of the surge protector, which will affect the protection effect.

As shown in L3 in fig. 5, the distance between the on-site surge lightning protection module (SPD) and the ground terminal is 0.5m if small, and 2m or more if large, and the distance is 1 m. From the voltage drop algorithm on L1, one can obtain: the voltage drop at L3 is 1KV, which is as high as 1KV and severely affects the ability of the SPD to shunt inrush current. At present, a method for shortening a connecting wire by adopting a Kelvin wiring method is advocated, and the method requires that a grounding bus is firstly connected with an SPD and then goes to a distribution cabinet from a lead wire of the SPD. Because the switch board of job site is the finished product of enterprise outsourcing basically, that is to say the SPD of switch board has already been connected according to conventional wiring before arriving the installation scene. According to construction habits, the electrical installer does not make any treatment on the connections of the SPD. Secondly, the grounding body led from the grounding system is flat iron under most conditions, and in order to ensure the grounding reliability of the power distribution cabinet, the flat iron is often directly and reliably connected (generally welded) with the shell of the power distribution cabinet on site. And thus will not be connected to the SPD first. Finally, the wire connecting terminal of the SPD is limited by the size of the product and cannot be made to be large, but in a Kelvin wire connecting mode, the wire diameter of the connecting wire is much thicker than that of the connecting wire in other modes, the construction difficulty is large, the wire connection is easy to loosen, and the power supply feasibility is influenced. So, kelvin wiring in principle accounts for the voltage drop across L3, but is difficult to implement in the field situation.

In summary, when designing the installation position diagram, the influence of the length of the L1 connecting line on the SPD should be fully considered, the L1 connecting line should be close to the power supply incoming line side as much as possible, the length of the L1 connecting line is reduced, and the surge current dividing capability of the SPD is improved. Meanwhile, copper materials are saved, the cost is reduced, and the required requirements are met.

When the SPD surge protector of the utility model is used, the bottom of the traditional SPD is set into a metal conductive base, the power distribution cabinet is produced by taking iron or steel as a material, which belongs to a good conductor, the power distribution cabinet is characterized by good conductivity, the power distribution cabinet can be regarded as an extension body of a grounding body, the base material of the SPD is a conductor, the base is designed into a grounding end of the SPD, when the metal base 10 and the SPD body 4 are fixed, the steel frame contact plate 81 is directly contacted with the connecting steel frame 3 through the pushing of the spring, the metal base 10 is ensured to be directly contacted with the connecting steel frame 3, and then the metal base 3 is conducted to the surface of a control box through the connecting steel frame 3, copper materials can be well saved, lead wire sections of the SPD are directly saved, the distance between a field surge lightning protection module (SPD) and the grounding terminal is less, more than 0.5m and more than 2m is large, and the whole lead wire length, reach the standard, reduce the voltage drop on the circuit, thereby fine protective apparatus and personal safety, improve the security performance of whole SPD body 4, and in the in-process of installation, whole SPD body 4 is mutual sliding contact through inside connection piece 14 and limiting plate 91, and limiting plate 91 and slider 82 and connecting plate 95 also contact simultaneously, make sliding contact piece 94 and steelframe contact plate 81 and install the surperficial mutual contact who connects steelframe 3 at the back, and through first spring 83 and limiting spring 92's effect, can make steelframe contact plate 81 and sliding contact piece 94 tightly push up on the surface of connecting steelframe 3, make the contact more accurate, and this length is similar to one section earth connection and is connected steelframe 3 interconnect, be connected with outer box.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a SPD surge protector, includes connection steelframe (3), its characterized in that: a plurality of installation U type groove (1) has been seted up to the inside of connecting steelframe (3), sliding tray (2) have been seted up to the rear portion of connecting steelframe (3), the surface joint of connecting steelframe (3) has reserve protector (5), there is SPD body (4) bottom of reserve protector (5) through bolted connection, it has input line (6) to peg graft at the top of reserve protector (5), there is metal base (10) bottom of SPD body (4) through bolted connection, it has a plurality of output line (7) to peg graft the bottom of metal base (10), the inside of metal base (10) is provided with contact mechanism (8).

2. An SPD surge protector according to claim 1, wherein: the front part of the SPD body (4) is spliced with a plurality of splicing pieces (11), slots (12) are formed in the SPD body (4) and the metal base (10), and splicing sleeves (13) are clamped on the inner walls of the slots (12).

3. An SPD surge protector according to claim 1, wherein: the metal seat (10) is made of one of copper or iron, and the inserting sleeve (13) is made of a copper sheet.

4. An SPD surge protector according to claim 1, wherein: the contact mechanism (8) comprises a steel frame contact plate (81), a sliding block (82) is welded at the bottom of the steel frame contact plate (81), a first spring (83) is welded at the bottom of the sliding block (82), a clamping groove (84) is formed in the front of the sliding block (82), the upper surface of the steel frame contact plate (81) is in contact with the bottom of a connecting steel frame (3), a movable cavity (85) is formed in the SPD body (4), and a protection mechanism (9) is arranged in the movable cavity (85).

5. An SPD surge protector according to claim 4, wherein: the protection mechanism (9) comprises a limiting plate (91), a connecting plate (95) is welded to the front portion of the limiting plate (91), a limiting rod (93) is welded to the front portion of the connecting plate (95), the surface of the limiting rod (93) is connected to the inside of the SPD body (4) in a sliding mode, a sliding contact piece (94) is welded to the top of the connecting plate (95), the right side of the sliding contact piece (94) penetrates through the SPD body (4) and is in contact with the front surface of the connecting steel frame (3), a limiting spring (92) is welded to the front portion of the sliding contact piece (94), and the limiting spring (92) is located inside the SPD body (4).

6. An SPD surge protector according to claim 2, wherein: the surface welding of plug bush (13) has connection piece (14), the right side sliding connection of connection piece (14) is in the bottom of limiting plate (91).