Electrical fireproof current-limiting protector

Abstract

The utility model discloses an electrical fireproof current-limiting protector, which comprises a shell and a radiator arranged in the shell, the radiator is connected with the bottom of the shell through an arranged insulating part; the insulating part comprises a supporting part, a first fastener arranged at one end of the supporting part and a second fastener arranged at the other end of the supporting part, internal threaded holes are formed in the two ends of the supporting part, and the first fastener penetrates through the radiator to be connected with the supporting part. And the second fastener penetrates through the shell and then is connected with the other end of the supporting part, so that the insulating part is fixed in the shell. On the basis, insulation between the radiator and the shell is achieved through the insulating part, and the problem that in the prior art, the insulating effect is poor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of protectors, in particular to an electrical fire-proof current-limiting protector. Background Art

[0002] An electrical fire-proof current-limiting protector is a switching device implemented using semiconductor power devices. When a short-circuit current is generated, it can achieve current limiting protection at a speed of microseconds to avoid dangerous electric sparks that cause fires. Since semiconductor power devices have large working currents, they must be cooled by air with a heat sink and a fan to dissipate large currents. There is insulating cloth between the power device and the heat sink, which can only achieve electrical insulation, but true safety insulation cannot be achieved. Due to its large size, three-phase current-limiting protectors generally use metal casings, so the problem of safety insulation is more prominent. Utility Model Content

[0003] The purpose of the utility model is to provide an electrical fire-proof current-limiting protector to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electrical fire-proof current-limiting protector, comprising a shell and a radiator installed inside the shell; the radiator is connected to the bottom of the shell through an insulating member; the insulating member comprises a support portion and a first fastener arranged at one end of the support portion and a second fastener arranged at the other end of the support portion; the first fastener passes through the radiator and is connected to the support portion to fix one end of the insulating member on the radiator; the second fastener passes through the shell and is connected to the other end of the support portion to fix the insulating member in the shell.

[0005] As a preferred technical solution of the utility model: the insulating member also includes a first bearing portion located at one end of the support portion and a second bearing portion located at the other end of the support portion, and the first bearing portion and the second bearing portion are movably mounted on the support portion.

[0006] As a preferred technical solution of the utility model: the first bearing part and the second bearing part are both threadedly matched with the internal threaded hole provided on the support part through the threaded part provided thereon.

[0007] As a preferred technical solution of the present utility model: elastic protrusions are further provided on one side of the first bearing part and the second bearing part away from the supporting part.

[0008] As a preferred technical solution of the utility model: a flat groove is further provided on the outer wall surface of the support portion, and the number of the flat grooves is multiple.

[0009] By adopting the above technical solution, the beneficial effects of the utility model are as follows: the first fastener passes through the radiator and is connected to the support portion to fix one end of the insulating member on the radiator; the second fastener passes through the shell and is connected to the other end of the support portion to fix the insulating member in the shell; therefore, the insulating member can be used to achieve the insulation capacity between the radiator and the shell, and at the same time, the two fasteners are used to fix the insulating member to the radiator and the shell, so that the position of the insulating member is stable and the radiator can be supported. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0011] Figure 2 It is a schematic diagram of the cross-sectional structure of the insulating member of the utility model;

[0012] Figure 3 It is a schematic diagram of the exploded structure of the insulating component of the utility model.

[0013] In the figure: 1, shell; 2, heat sink; 3, insulating member; 30, support portion; 31, first bearing portion; 32, first fastener; 33, second bearing portion; 34, threaded portion; 35, flat groove; 36, internal threaded hole; 37, elastic protrusion; 38, second fastener. DETAILED DESCRIPTION

[0014] Embodiments of the present utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present utility model, and should not be construed as limitations on the present utility model. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.

[0015] See also Figure 1-3The utility model provides an embodiment: an electrical fire-proof current-limiting protector, comprising a shell 1 and a radiator 2 installed inside the shell 1; the radiator 2 is connected to the bottom of the shell 1 through an insulating member 3; the insulating member 3 comprises a support portion 30 and a first fastener 32 arranged at one end of the support portion 30 and a second fastener 38 arranged at the other end of the support portion 30; the first fastener 32 passes through the radiator 2 and is connected to the support portion 30 to fix one end of the insulating member 3 on the radiator 2; the second fastener 38 passes through the shell 1 and is connected to the other end of the support portion 30 to fix the insulating member 3 in the shell 1.

[0016] In summary, the insulating member 3 can be used to achieve the insulation between the radiator 2 and the housing 1, and the insulating member 3 can be fixed to the radiator 2 and the housing 1 using two fasteners, so that the position of the insulating member 3 is stable and the radiator 2 can be supported. Therefore, compared with the prior art of suspending the radiator 2 and the housing 1 or laying an insulating pad between the radiator 2 and the housing 1, this solution has a simple structure, strong insulation ability, and can also support the radiator 2 to ensure the stability of the radiator 2 after being connected to the housing 1.

[0017] In addition, the bottom of the heat sink 2 is fixed to the housing 1 using an insulating member 3, so the PCB on the heat sink 2 does not need to be fixed with screws, and the phases are separated by epoxy boards of a certain height, so that a sufficient creepage distance can be achieved, and the width of the entire machine can also be made relatively narrow.

[0018] On the basis of the above scheme, since the insulating member 3 also includes a first bearing portion 31 located at one end of the support portion 30 and a second bearing portion 33 located at the other end of the support portion 30, and the first bearing portion 31 and the second bearing portion 33 are movably mounted on the support portion 30, the height of the support portion 30 can be adjusted by adding two bearing portions; in addition, when the two bearing portions are also made of insulating material, the insulating capacity of the insulating member 3 is made stronger.

[0019] Furthermore, since the support part 30 is configured in a cylindrical shape, and the first bearing part 31 and the second bearing part 33 have the same structure and are both configured in a truncated cone shape, when the two bearing parts are assembled with the support part 30, the middle part of the insulating member 3 has the largest diameter, and gradually narrows from the middle part to both ends of the insulating member 3. Therefore, the insulating member 3 can also follow the creepage distance to further improve the insulation capacity of the device.

[0020] In addition, since the first bearing part 31 and the second bearing part 33 are threadedly matched with the internal threaded hole 36 provided on the support part 30 through the threaded part 34, rotating the support part 30 can simply and conveniently cause the two bearing parts to move toward or away from each other to adjust the height of the insulating part 3 when in use.

[0021] In order to enhance the anti-slip ability, elastic protrusions 37 are further provided on one side of the first bearing portion 31 and the second bearing portion 33 away from the supporting portion 30. In addition, when the elastic protrusions 37 contact the radiator 2 and the shell 1, the adaptability of the elastic protrusions 37 is utilized to avoid squeezing damage to the radiator 2 and the shell 1 caused by the insulating member 3.

[0022] Furthermore, since a flat groove 35 is provided on the outer wall surface of the support portion 30, and the number of the flat grooves 35 is multiple, it is convenient to clamp a wrench on the flat groove 35 to cause the support portion 30 to rotate, thereby driving the two bearing portions to move toward or away from each other, so as to achieve the adjustment of the height of the insulating part 3.

[0023] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. An electrical fire-proof current-limiting protector, characterized in that: It comprises a housing (1) and a radiator (2) installed inside the housing (1); The radiator (2) is connected to the bottom of the housing (1) via an insulating member (3); The insulating member (3) comprises a supporting portion (30), a first fastener (32) arranged at one end of the supporting portion (30), and a second fastener (38) arranged at the other end of the supporting portion (30); The first fastener (32) passes through the radiator (2) and is connected to the support portion (30), so as to fix one end of the insulating member (3) on the radiator (2); The second fastener (38) passes through the shell (1) and is connected to the other end of the support portion (30), so as to fix the insulating member (3) inside the shell (1).

2. An electrical fire-proof current-limiting protector according to claim 1, characterized in that: The insulating member (3) further comprises a first bearing portion (31) located at one end of the supporting portion (30) and a second bearing portion (33) located at the other end of the supporting portion (30), and the first bearing portion (31) and the second bearing portion (33) are movably mounted on the supporting portion (30).

3. An electrical fire-proof current-limiting protector according to claim 2, characterized in that: The first bearing portion (31) and the second bearing portion (33) are both threadedly matched with an internal threaded hole (36) provided on the support portion (30) through a threaded portion (34).

4. The electrical fire-proof current-limiting protector according to claim 3 is characterized in that: Elastic protrusions (37) are also provided on one side of the first bearing portion (31) and the second bearing portion (33) away from the supporting portion (30).

5. An electrical fire-proof current-limiting protector according to claim 4, characterized in that: A flat groove (35) is also provided on the outer wall surface of the support portion (30), and the number of the flat grooves (35) is plural.

Images