Surge protection device

Abstract

The utility model provides a surge protection device relates to overvoltage protection equipment field, including base, shell and install surge protection module in the shell, the base is wrapped in the shell back, and the triangle of base inner side four corners respectively with the triangle of shell back four corners of shell back four corners. The other corner of the four corners of the inner side of the base and the other corner of the four corners of the back of the shell are detachably fixed through the fixing piece, firstly, the base and the shell are preliminarily installed and positioned in an elastic clamping mode of the base and the three corners of the shell, and then the base and the shell are fixed through the fixing piece. On one hand, rapid installation and detachment between the base and the shell are facilitated, on the other hand, the base wraps the back of the shell, the edge of the shell can be protected, the positioning effect is achieved, and in order to avoid the situation that the edge of the surge protection device is too sharp, chamfering treatment is conducted on the corners of the base and the shell.

Description

Technical Field

[0001] The utility model relates to the field of overvoltage protection equipment, in particular to a surge protector. Background Art

[0002] With the development of power, new energy and other industries, the application voltage range of power systems is getting wider and wider. Power systems with voltages higher than 690V to 1500V are becoming more and more common in applications. This type of power system also requires surge protection to ensure the safety and reliability of the power system. At present, low-voltage surge protectors are generally used in series or high-voltage lightning arresters for power systems with voltages of 690V to 1500V.

[0003] Surge protector, also known as lightning arrester, is an electronic device that provides safety protection for various electronic equipment, instruments and meters, and communication lines. When a spike current or voltage suddenly occurs in an electrical circuit or communication line due to external interference, the surge protector can conduct and shunt in a very short time, thereby preventing the surge from damaging other equipment in the circuit. It has switch type, voltage limiting type, combination type and other protection modes;

[0004] Existing surge protectors generally include a base, a shell, and a surge protection module component. The surge protection module is arranged in the shell. The surge protection module of the surge protector is mostly fixed to the base by a contact. If the contact and the base are clamped too tightly, the surge protection module is damaged and needs to be replaced, which makes it difficult to disassemble. If the contact and the base are clamped too loosely, the surge protection module is not firmly fixed.

[0005] Therefore, it is necessary to provide a new surge protector to solve the above technical problems. Utility Model Content

[0006] In order to solve the technical problem that surge protection modules of existing surge protectors are mostly fixed by clamping contacts and a base, if the contacts and the base are clamped too tightly, the surge protection module will be damaged and difficult to disassemble when it needs to be replaced; if the contacts and the base are clamped too loosely, the surge protection module will not be firmly fixed, the utility model provides a surge protector.

[0007] The surge protector provided by the utility model comprises a base, a shell and a surge protection module installed in the shell, wherein the base is wrapped around the back of the shell, and one of the triangles at the four inner corners of the base is elastically engaged with one of the triangles at the four back corners of the shell respectively, and the other one of the four inner corners of the base is detachably fixed with the other one of the four back corners of the shell by a fixing piece.

[0008] Furthermore, one of the four corners on the inner side of the base is provided with a connecting plate, and through slots are respectively provided on the three connecting plates, and one of the four corners on the back of the shell is provided with a hook-shaped elastic sheet;

[0009] The elastic sheet passes through the through slot and is interference fit with the connecting plate.

[0010] Furthermore, the fixing member includes a fixing plate and a positioning column, the fixing plate is fixedly connected to the inner side of the base, a connecting groove for the fixing plate to pass through is opened on the outer side of the shell, a positioning ring is embedded in the connecting groove, the middle part of the positioning column is composed of two opposite elastic arc plates, and both of the elastic arc plates are provided with barbs, and the barbs are engaged with the inner side of the positioning ring.

[0011] Furthermore, the fixing part includes a connecting plate and a screw, the connecting plate is fixedly connected to the inner side of the base, a sliding groove is provided on the outer side of the shell for the connecting plate to pass through, and a positioning hole that cooperates with the screw thread is also provided in the sliding groove, and the shell and the connecting plate are disassembled and installed through the screw thread.

[0012] Furthermore, a movable groove is provided on the back of the shell, and a movable column corresponding to the movable groove is fixed on the inner side of the base, and the outer surface of the movable column is gap-matched with the inner wall of the movable groove.

[0013] Furthermore, the movable column and the base are connected to form an integrated structure.

[0014] Furthermore, the corners of the base and the shell are chamfered.

[0015] Compared with the related art, the surge protector provided by the utility model has the following beneficial effects:

[0016] First, use the elastic snap-fit ​​method at the three corners of the base and the shell to preliminarily install and position it, and then fix the base and the shell with fixing parts. On the one hand, it is convenient for quick installation and disassembly between the base and the shell, and on the other hand, the base is wrapped around the back of the shell to protect the edge of the shell and play a positioning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a preferred embodiment of the surge protector provided by the utility model;

[0018] Figure 2 Schematic diagram of the split structure of the surge protector provided by the utility model Figure 1 ;

[0019] Figure 3 Schematic diagram of the split structure of the surge protector provided by the utility model Figure 2 ;

[0020] Figure 4 Schematic diagram of the split structure of the surge protector provided by the utility model Figure 3 ;

[0021] Figure 5 A schematic diagram of the structure of a second embodiment of a surge protector provided by the utility model;

[0022] Figure 6 This is a structural schematic diagram of the positioning column and the positioning ring provided by the utility model.

[0023] Numbers in the figure: 1. base; 2. shell; 3. surge protection module; 4. serial plate; 5. through slot; 6. elastic sheet; 7. fixing plate; 8. positioning column; 9. connecting slot; 10. positioning ring; 11. elastic arc plate; 12. barb; 13. connecting plate; 14. screw; 15. slide slot; 16. positioning hole; 17. movable slot; 18. movable column. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0025] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 ,in, Figure 1 A schematic structural diagram of a preferred embodiment of the surge protector provided by the utility model; Figure 2 Schematic diagram of the split structure of the surge protector provided by the utility model Figure 1 ; Figure 3 Schematic diagram of the split structure of the surge protector provided by the utility model Figure 2 ; Figure 4 Schematic diagram of the split structure of the surge protector provided by the utility model Figure 3 ; Figure 5 A schematic diagram of the structure of a second embodiment of a surge protector provided by the utility model; Figure 6 This is a structural schematic diagram of the positioning column and the positioning ring provided by the utility model.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Embodiment 1

[0028] In the specific implementation process, Figure 1-Figure 4 As shown, the surge protector includes a base 1, a shell 2 and a surge protection module 3 installed in the shell 2, the base 1 is wrapped around the back of the shell 2, and one of the triangles at the four inner corners of the base 1 is elastically engaged with one of the triangles at the four back corners of the shell 2, and the other one of the four inner corners of the base 1 is detachably fixed with the other one of the four back corners of the shell 2 by a fixing piece, firstly, the base 1 and the shell 2 are preliminarily installed and positioned by means of elastic engagement at three corners, and then the base 1 and the shell 2 are fixed by the fixing piece, which is convenient for quick installation and disassembly between the base 1 and the shell 2 on the one hand, and on the other hand, the base 1 is wrapped around the back of the shell 2 to protect the edge of the shell 2 and play a positioning effect;

[0029] It should be noted that the surge protection module 3 uses arc extinguishing technology and temperature control protection circuits to quickly cut off overcurrent and prevent electric sparks from causing fires when overcurrent occurs, and the surge protection module 3 in the utility model uses a traditional voltage-limiting surge protection module 3;

[0030] Specifically, under normal conditions, the voltage-limiting type also presents high impedance. When encountering transient overvoltage, the internal zinc oxide varistor, TVS diode or avalanche diode and other components start to work, and their impedance gradually decreases as the voltage increases, forming a nonlinear volt-ampere characteristic, clamping the overvoltage within a safe level, while allowing the surge current to be discharged to the ground through itself;

[0031] In order to prevent the shell 2 from being easily moved when being squeezed, a movable groove 17 is opened on the back of the shell 2, and a movable column 18 corresponding to the movable groove 17 is fixed on the inner side of the base 1. The movable column 18 and the base 1 are connected as an integrated structure, and the outer surface of the movable column 18 and the inner wall of the movable groove 17 are gap-matched. When the shell 2 is squeezed, the movable column 18 can play a protective supporting effect for the shell 2;

[0032] A connecting plate 4 is provided at one of the four corners of the inner side of the base 1, and through slots 5 are respectively provided on the three connecting plates 4. An elastic piece 6 in the shape of a barb 12 is provided at one of the four corners of the back of the shell 2. The elastic piece 6 passes through the through slot 5 and is interference-fitted with the connecting plate 4. Specifically, one end of the elastic piece 6 is fixedly connected to the back of the shell 2, and the other end of the elastic piece 6 is tilted and elastic, so that the elastic piece 6 can pass through the through slot 5 and engage with the connecting plate 4, so as to achieve a quick installation effect;

[0033] The fixing part includes a fixing plate 7 and a positioning column 8. The fixing plate 7 is fixedly connected to the inner side of the base 1. A connecting groove 9 is provided on the outer side of the shell 2 for the fixing plate 7 to pass through. A positioning ring 10 is embedded in the connecting groove 9. The middle part of the positioning column 8 is composed of two opposite elastic arc plates 11, and both elastic arc plates 11 are provided with barbs 12. The barbs 12 are engaged with the inner side of the positioning ring 10. When the elastic arc plates 11 pass through the positioning ring 10, the barbs 12 on the edges of the two elastic arc plates 11 shrink inwardly, and after the positioning column 8 moves to a certain distance, the elastic arc plates 11 are expanded due to elastic force and are engaged with the inner edge of the positioning ring 10.

[0034] In order to prevent the edge of the surge protector from being too sharp, chamfering is performed on the corners of the base 1 and the shell 2 .

[0035] Embodiment 2

[0036] In the specific implementation process, the difference from the first embodiment is that the reference Figure 5-Figure 6 As shown, the fixing member includes a connecting plate 13 and a screw 14. The connecting plate 13 is fixedly connected to the inner side of the base 1. A slide groove 15 is provided on the outer side of the shell 2 for the connecting plate 13 to pass through. A positioning hole 16 that is threadedly matched with the screw 14 is also provided in the slide groove 15. The shell 2 and the connecting plate 13 are disassembled and installed by the screw 14. The connecting plate 13 on the base 1 is inserted into the slide groove 15, and the screw 14 passes through the through hole on the connecting plate 13 and is screwed into the positioning hole 16 to improve the fixing effect.

[0037] The working principle provided by the utility model is as follows: first, the base 1 and the shell 2 are preliminarily installed and positioned by means of elastic snap-fitting at the three corners thereof, and then the base 1 and the shell 2 are fixed by means of fixing parts. On the one hand, it is convenient for quick installation and disassembly between the base 1 and the shell 2, and on the other hand, the base 1 is wrapped around the back of the shell 2 to protect the edge of the shell 2 and play a positioning effect. One end of the elastic sheet 6 is fixedly connected to the back of the shell 2, and the other end of the elastic sheet 6 is tilted and elastic, so that the elastic sheet 6 can pass through the through slot 5 and snap-fit ​​with the serial plate 4 to achieve a quick installation effect.

[0038] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0039] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A surge protector, comprising a base (1), a housing (2), and a surge protection module (3) installed in the housing (2), characterized in that: The base (1) is wrapped around the back of the shell (2), and one of the three corners of the four inner corners of the base (1) is elastically engaged with one of the three corners of the four back corners of the shell (2), and the other one of the four inner corners of the base (1) is detachably fixed to the other one of the four back corners of the shell (2) via a fixing piece.

2. The surge protector according to claim 1, characterized in that: A connecting plate (4) is provided at one of the four inner corners of the base (1), and through slots (5) are respectively provided on the three connecting plates (4); and an elastic sheet (6) in the shape of a barb (12) is provided at one of the four inner corners of the shell (2); The elastic sheet (6) passes through the through slot (5) and is interference fit with the connecting plate (4).

3. The surge protector according to claim 2, characterized in that: The fixing member comprises a fixing plate (7) and a positioning column (8), wherein the fixing plate (7) is fixedly connected to the inner side of the base (1), the outer side of the shell (2) is provided with a connecting groove (9) for the fixing plate (7) to pass through, a positioning ring (10) is embedded in the connecting groove (9), the middle part of the positioning column (8) is composed of two opposite elastic arc plates (11), and the two elastic arc plates (11) are both provided with barbs (12), and the barbs (12) are engaged with the inner side of the positioning ring (10).

4. The surge protector according to claim 2, characterized in that: The fixing member comprises a connecting plate (13) and a screw (14); the connecting plate (13) is fixedly connected to the inner side of the base (1); a slide groove (15) is provided on the outer side of the shell (2) for the connecting plate (13) to pass through; a positioning hole (16) is also provided in the slide groove (15) which is threadedly matched with the screw (14); the shell (2) and the connecting plate (13) are threadedly disassembled and installed by means of the screw (14).

5. The surge protector according to claim 3 or 4, characterized in that: A movable groove (17) is provided on the back of the shell (2), and a movable column (18) corresponding to the movable groove (17) is fixed on the inner side of the base (1), and the outer surface of the movable column (18) is gap-matched with the inner wall of the movable groove (17).

6. The surge protector according to claim 5, characterized in that: The movable column (18) and the base (1) are connected to form an integrated structure.

7. The surge protector according to claim 6, characterized in that: The corners of the base (1) and the shell (2) are chamfered.

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