Air duct box for heat dissipation device of high-voltage switch cabinet

Abstract

The utility model discloses an air duct box used for a high voltage switch cabinet heat radiation device, the air duct box comprises a front cover and a rear cover, an adsorption mechanism is arranged in the rear cover, the adsorption mechanism comprises a first permanent magnet and a second permanent magnet, the first permanent magnet is installed on a fixed shaft, and two ends of the fixed shaft are respectively fixedly connected with inner side walls of two ends of the rear cover; the second permanent magnet is installed on the rotating shaft, through holes are formed in the side walls of the two ends of the rear cover correspondingly, and the two ends of the rotating shaft penetrate through the through holes correspondingly and are fixedly connected with the rotating piece. The second permanent magnet is located right above the first permanent magnet, and a user adjusts the rotating piece to enable the magnetic field intensity of the first permanent magnet and the magnetic field intensity of the second permanent magnet to be in an addition or cancellation state. When the magnetic field intensity is in an added state, the heat dissipation device can be directly adsorbed on the cabinet body of the switch cabinet, punching is not needed, and assembly is simple; and when the magnetic field intensity is in a cancelling state, the heat dissipation device and the switch cabinet are disconnected magnetically, and the disassembly and assembly are convenient.

Description

Technical Field

[0001] The utility model relates to a heat dissipation device, in particular to an air duct box used for a heat dissipation device of a high-voltage switch cabinet. Background Art

[0002] Switchgear is a large piece of electrical equipment containing numerous electronic components, which generate heat during operation. During normal operation, this heat is dissipated through the heat dissipation holes in the switchgear body. However, if an arc fault occurs within the switchgear, significant heat and pressure are generated. The heat dissipation holes in the switchgear body cannot quickly release the internal energy, which can cause the switchgear to explode, resulting in significant safety hazards and economic losses. Furthermore, the width of the heat dissipation holes in switchgear produced by different manufacturers can vary. Even switchgear produced by the same manufacturer with different voltage levels, such as 10kV and 35kV, can have different widths. Traditional heat dissipation devices have a single width and can only be used for switchgear of a certain specification, making them less versatile. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides an air duct box for a heat dissipation device of a high-voltage switch cabinet.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A duct box for a high-voltage switchgear heat dissipation device, the duct box comprising a front cover and a rear cover, an adsorption mechanism being provided in the rear cover, the adsorption mechanism comprising a first permanent magnet and a second permanent magnet, the first permanent magnet being mounted on a fixed shaft, the two ends of the fixed shaft being fixedly connected to the two end inner side walls of the rear cover; the second permanent magnet being mounted on a rotating shaft, the two end side walls of the rear cover being respectively provided with through holes, the two ends of the rotating shaft respectively passing through the through holes and being fixedly connected to a rotating member; the second permanent magnet being located directly above the first permanent magnet, so that the magnetic field strengths of the first permanent magnet and the second permanent magnet are in an additive or destructive state.

[0006] One side of the first permanent magnet has a magnetic pole as an N pole, and the other side has a magnetic pole as an S pole.

[0007] One side magnetic pole of the second permanent magnet is an N pole, and the other side magnetic pole is an S pole.

[0008] The length of the front cover is greater than that of the rear cover. After assembly, the side walls at both ends of the front cover are located outside the side walls at both ends of the rear cover.

[0009] A pressure relief port is provided on one side of the front cover, and a pressure relief plate covering the pressure relief port is installed.

[0010] The end surface of the rotating member is provided with a regular hexagonal groove.

[0011] The present invention has the following beneficial effects: a suction mechanism is provided within the rear cover of the present invention, the suction mechanism comprising a first permanent magnet and a second permanent magnet, the first permanent magnet being mounted on a fixed shaft, the second permanent magnet being mounted on a rotating shaft, one end of the rotating shaft being fixedly connected to a rotating member, and the second permanent magnet being positioned directly above the first permanent magnet. A user adjusts the magnetic pole position of the second permanent magnet by adjusting the rotating member, so that the magnetic field strengths of the first and second permanent magnets are either additive or destructive. When the magnetic field strengths are additive, the heat sink can be directly attached to the switch cabinet body without drilling, simplifying assembly. When the magnetic field strengths are destructive, the magnetic connection between the heat sink and the switch cabinet is disconnected, making assembly and disassembly easy. Furthermore, the side walls of the front cover are positioned outside the side walls of the rear cover, allowing the user to adjust the distance between the rear cover and the front cover according to the width of the heat dissipation holes, thereby adjusting the width of the heat sink, making the heat sink suitable for switch cabinets of different specifications. This not only saves purchase costs but also makes it easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 It is a structural diagram of the air duct box;

[0015] Figure 3 It is a structural exploded view of the utility model;

[0016] Figure 4 is a schematic diagram showing that the magnetic field intensities of the first permanent magnet and the second permanent magnet are in an additive state;

[0017] Figure 5 This is a schematic diagram showing that the magnetic field intensities of the first permanent magnet and the second permanent magnet are in a canceling state. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other unless there is any conflict.

[0019] It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention.

[0020] Some embodiments of the present invention are described below with reference to the accompanying drawings.

[0021] Reference Figures 1 to 5, a duct box for a high-voltage switch cabinet heat dissipation device, attached to the heat dissipation holes outside the switch cabinet body, the duct box 1 has a fan box 2 on the top, the fan box 2 is provided with an air duct, and the air duct is installed in the fan 3, one side of the fan box 2 is provided with an exhaust port 21 connected to the air duct, and the lower end is provided with an air inlet 22; the upper end of the duct box 1 is provided with an air outlet 11 connected to the air inlet 22, and the lower end is provided with an exhaust port connected to the heat dissipation holes; in this embodiment, the fan box 2 is used to increase the heat dissipation speed of the switch cabinet, so that the heat in the cabinet can be quickly discharged, reducing safety hazards.

[0022] In the present invention, the air duct box 1 includes a front cover 12 and a rear cover 13. The rear cover 13 is provided with an adsorption mechanism. The adsorption mechanism includes a first permanent magnet 14 and a second permanent magnet 15. The first permanent magnet 14 is mounted on a fixed shaft 16, the ends of which are fixedly connected to the inner sidewalls of the rear cover 13, specifically by welding. The second permanent magnet 15 is mounted on a rotating shaft 17. The sidewalls of the rear cover 13 are provided with through holes, and the ends of the rotating shaft 17 pass through the through holes and are fixedly connected to a rotating member 18. The second permanent magnet 15 is located directly above the first permanent magnet 14, so that the magnetic field strengths of the first permanent magnet 14 and the second permanent magnet 15 are in an additive or destructive state. The user adjusts the magnetic pole position of the second permanent magnet by adjusting the rotating member, so that the magnetic field strengths of the first permanent magnet and the second permanent magnet are in an additive or destructive state.

[0023] Specifically, one side of the first permanent magnet 14 is an N pole, and the other side is an S pole. One side of the second permanent magnet 15 is an N pole, and the other side is an S pole. When the left side of the first permanent magnet 14 is an N pole, and the right side is an S pole, and the left side of the second permanent magnet 15 is an N pole, and the right side is an S pole, then the magnetic field strengths of the first permanent magnet 14 and the second permanent magnet 15 are in an additive state. Figure 4 Since the cabinet body of the switch cabinet is usually made of iron material, the heat dissipation device can be directly magnetically adsorbed on the cabinet body of the switch cabinet without drilling, and the assembly is simple; rotating the rotating part to make the second permanent magnet 15 flip 180 degrees. Since the first permanent magnet 14 is fixed and the left magnetic pole of the flipped second permanent magnet 15 is the N pole and the right magnetic pole is the S pole, at this time, the magnetic field strengths of the first permanent magnet 14 and the second permanent magnet 15 are in a canceling state. Figure 5 The magnetic connection between the heat sink and the switch cabinet is disconnected, which makes disassembly and assembly easy and reduces time and maintenance costs.

[0024] A pressure relief vent 121 and a pressure relief plate 122 covering the vent 121 are provided on one side of the front cover 12. Under normal circumstances, the vent 121 is covered by the pressure relief plate 122. However, if an arcing accident occurs in the switchgear, the gas inside the switchgear will push the pressure relief plate 122 open, releasing pressure and effectively preventing accidents.

[0025] Specifically, the upper end of the pressure relief plate 122, near the pressure relief port 121, is fixedly connected to the front cover 12 via plastic bolts. The lower end of the pressure relief plate 122, near the pressure relief port 121, is fixedly connected to the front cover 12 via metal bolts. When high temperature and high pressure are generated within the switchgear, the gas within the switchgear dislodges the plastic bolts, causing the pressure relief plate 122 to bend outward at the metal bolts without flying out. This prevents the pressure relief plate 122 from detaching from the cabinet and causing a dangerous situation.

[0026] The end face of the rotating member 18 is provided with a regular hexagonal groove. The rotating member 18 can be twisted with a common hexagonal wrench for easy use.

[0027] The front cover 12 is longer than the rear cover 13. After assembly, the sidewalls of the front cover 12 are positioned outside the sidewalls of the rear cover 13. During use, the user adjusts the width of the duct box 1 by moving the front and rear covers 12, 13, so that the sidewalls of the rear cover 13 fit within the sidewalls of the front cover 12, depending on the distance between the heat dissipation holes of the switch cabinet. This allows the user to adjust the width of the duct box 1 to accommodate different switch cabinet models and facilitate user use. Once moved to the appropriate position, holes can be drilled in the front and rear covers 12, 13, and screwed together for easy installation.

[0028] In this utility model, the term "plurality" refers to two or more, unless otherwise expressly defined. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items. Terms such as "install," "connect," "connect," and "fix" should be understood broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0029] It should be noted that when an element is referred to as being "assembled to," "mounted to," "fixed to," or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0030] Throughout this specification, terms such as "one embodiment," "some embodiments," or "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0031] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air duct box for a high-voltage switchgear heat dissipation device, characterized in that The air duct box (1) includes a front cover (12) and a rear cover (13), and an adsorption mechanism is provided in the rear cover (13), and the adsorption mechanism includes a first permanent magnet (14) and a second permanent magnet (15), the first permanent magnet (14) is mounted on a fixed shaft (16), and the two ends of the fixed shaft (16) are respectively fixedly connected to the inner side walls of the two ends of the rear cover (13); the second permanent magnet (15) is mounted on a rotating shaft (17), and the two end side walls of the rear cover (13) are respectively provided with through holes, and the two ends of the rotating shaft (17) pass through the through holes and are fixedly connected to the rotating member (18); after assembly, the second permanent magnet (15) is located directly above the first permanent magnet (14), so that the magnetic field strengths of the first permanent magnet (14) and the second permanent magnet (15) are in an additive or destructive state; One side of the first permanent magnet (14) has an N pole, and the other side has an S pole; One side magnetic pole of the second permanent magnet (15) is an N pole, and the other side magnetic pole is an S pole.

2. The air duct box for the high-voltage switch cabinet heat dissipation device according to claim 1 is characterized in that The length of the front cover (12) is greater than the length of the rear cover (13). After assembly, the side walls at both ends of the front cover (12) are located outside the side walls at both ends of the rear cover (13).

3. The air duct box for the high-voltage switch cabinet heat dissipation device according to claim 1 is characterized in that A pressure relief port (121) is provided on one side of the front cover (12), and a pressure relief plate (122) is installed to cover the pressure relief port (121).

4. The air duct box for the high-voltage switch cabinet heat dissipation device according to claim 1 is characterized in that The end surface of the rotating member (18) is provided with a regular hexagonal groove.

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