A dual power supply box for fans in a weak current room

Abstract

The utility model belongs to the technical field of power supply boxes, and specifically relates to a dual power supply box for a fan in a weak current machine room, including a box body and a mounting plate, the interior of the box body is fixedly connected with a mounting plate, a power switch is symmetrically mounted on the top of one side of the mounting plate, a power conversion switch is fixedly mounted on the top of one side of the mounting plate, a normally open button switch and a pressing component for pressing the normally open button switch are arranged in the middle of one side of the mounting plate, and a plurality of equally spaced relay switches are arranged at the bottom of one side of the mounting plate. In the utility model, after the city power is cut off, the pressing component loses power to release the pressing of the normally open button switch, and the electromagnet is energized after the power switching is completed. Due to the small air intake gap, the stainless steel piston head slowly moves to the left, and the normally open button switch is pressed after the extrusion end has been pressed for a certain period of time. At this time, the voltage is relatively stable, avoiding voltage fluctuations caused by too short switching time, which may damage the fan motor.

Description

Technical Field

[0001] The utility model belongs to the technical field of power supply boxes, and in particular relates to a double power supply box for fans in a weak current machine room. Background Art

[0002] The dual power supply cabinet is composed of a dual power automatic switching device, which can automatically switch between the normal power supply and the backup power supply as needed to ensure the reliability and continuity of power supply. It is widely used in high-rise buildings, post and telecommunications, industrial and mining enterprises, shipping and other important places that require uninterrupted power supply. In order to ensure the heat dissipation of the motor room, the fan in the motor room needs to work for a long time, so it is necessary to provide dual power protection for the fan.

[0003] The commonly used dual power supply box automatically switches the power supply through the power switching switch. Since the power switching switch immediately switches to the backup power supply after detecting the mains power outage, the power switching time interval is short. For some electrical appliances that have strict requirements on downtime, the short downtime has certain advantages. However, for the fan in the computer room, the downtime requirements are relatively loose, and the short time interval for switching the power supply is prone to cause voltage fluctuations, causing damage to the motor and other electrical components inside the fan. Utility Model Content

[0004] The purpose of the utility model is to provide a dual power supply box for a fan in a weak current machine room, which can avoid voltage fluctuations caused by too short switching time and damage to the fan motor, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dual power supply box for a fan in a weak current machine room, comprising a box body and a mounting plate, the mounting plate being fixedly connected to the interior of the box body, power switches being symmetrically mounted on the top of one side of the mounting plate, a power conversion switch being fixedly mounted on the top of one side of the mounting plate, a normally open push button switch and a pressing assembly for pressing the normally open push button switch being arranged in the middle of one side of the mounting plate, and a plurality of equally spaced relay switches being arranged at the bottom of one side of the mounting plate.

[0006] Furthermore, the pressing assembly includes a U-shaped long shell fixedly connected to one side of the mounting plate, a stainless steel piston head is slidably connected inside the U-shaped long shell, an electromagnet is fixedly connected to one end of the U-shaped long shell, a retaining ring is fixedly connected inside the U-shaped long shell, the stainless steel piston head is arranged between the electromagnet and the retaining ring, a first annular groove is provided at one end of the stainless steel piston head, a first spring is fixedly connected inside the first annular groove, and one end of the first spring is fixedly connected to one end of the retaining ring.

[0007] Furthermore, a transformer is fixedly mounted on one side of the mounting plate, and the electromagnet is electrically connected to the power conversion switch through the transformer.

[0008] Furthermore, one end of the U-shaped long shell is slidably connected to an end plate, one end of the retaining ring is provided with a second annular groove, the interior of the second annular groove is fixedly connected to a second spring, and one end of the second spring is fixedly connected to one end of the end plate.

[0009] Furthermore, one end of the stainless steel piston head is fixedly connected to a U-shaped rod, a through hole is opened in the middle of the end plate, the U-shaped rod passes through the through hole, and one end of the U-shaped rod is fixedly connected to an extrusion end head.

[0010] Furthermore, the diameter of the through hole is 1-2 mm larger than the diameter of the U-shaped rod.

[0011] Furthermore, the relay switch is electrically connected to the power conversion switch via a normally open push button switch, and both of the power switches are electrically connected to the power conversion switch.

[0012] Compared with the prior art, the beneficial effects of the utility model are: after the mains power is cut off, the pressing component loses power and the normally open button switch is released. After the power is switched, the electromagnet is energized. Due to the small air intake gap, the stainless steel piston head moves slowly to the left, and the normally open button switch is pressed after the extrusion end has been pressed for a certain period of time. At this time, the voltage is relatively stable, avoiding voltage fluctuations caused by too short switching time, which may cause damage to the fan motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a front view of the utility model;

[0015] Figure 3 It is a front cross-sectional view of the pressing assembly of the utility model;

[0016] Figure 4 It is a circuit flow diagram of the utility model.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0018] 1. Box body; 2. Mounting plate; 3. Power switch; 4. Power conversion switch; 5. Normally open push button switch; 6. Press assembly; 61. U-shaped long shell; 62. Stainless steel piston head; 63. Electromagnet; 64. Retaining ring; 65. First annular groove; 66. First spring; 67. End plate; 68. Second annular groove; 69. Through hole; 610. Second spring; 611. U-shaped rod; 612. Extrusion end; 7. Transformer; 8. Relay switch. DETAILED DESCRIPTION

[0019] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0020] like Figure 1 and 4 As shown, a dual power supply box for a fan in a weak current machine room includes a box body 1 and a mounting plate 2, the mounting plate 2 is fixedly connected to the inside of the box body 1, a power switch 3 is symmetrically installed on the top of one side of the mounting plate 2, a power conversion switch 4 is fixedly installed on the top of one side of the mounting plate 2, a normally open button switch 5 and a pressing component 6 for pressing the normally open button switch 5 are arranged in the middle of one side of the mounting plate 2, a plurality of equally spaced relay switches 8 are arranged at the bottom of one side of the mounting plate 2, the relay switch 8 is electrically connected to the power conversion switch 4 through the normally open button switch 5, and the two power switches 3 are both electrically connected to the power conversion switch 4.

[0021] According to the above structure, when working, after the city power is cut off, the pressing component 6 loses power and the normally open button switch 5 is released, and the power conversion switch 4 automatically switches to the backup power supply. After the switching is completed, the pressing component 6 is energized, and after a certain period of time, the normally open button switch 5 is pressed to supply power to the fan, thereby avoiding voltage fluctuations caused by too short switching time, which may cause damage to the fan motor.

[0022] like Figure 2 and 3 As shown, the pressing assembly 6 includes a U-shaped long shell 61 fixedly connected to one side of the mounting plate 2, a stainless steel piston head 62 is slidably connected inside the U-shaped long shell 61, an electromagnet 63 is fixedly connected to one end of the U-shaped long shell 61, a retaining ring 64 is fixedly connected inside the U-shaped long shell 61, the stainless steel piston head 62 is arranged between the electromagnet 63 and the retaining ring 64, a first annular groove 65 is arranged at one end of the stainless steel piston head 62, a first spring 66 is fixedly connected inside the first annular groove 65, one end of the first spring 66 is fixedly connected to one end of the retaining ring 64, a transformer 7 is fixedly installed on one side of the mounting plate 2, and the electromagnet 63 is electrically connected to the power conversion switch 4 through the transformer 7.

[0023] According to the above structure, when the power is lost, the electromagnet 63 is de-energized, and the stainless steel piston head 62 moves to the right driven by the first annular groove 65. When the power is switched, the electromagnet 63 is energized, attracting the stainless steel piston head 62 to move to the left and close to the electromagnet 63.

[0024] like Figure 2 and 3As shown, one end of the U-shaped long shell 61 is slidably connected to the end plate 67, one end of the retaining ring 64 is provided with a second annular groove 68, the interior of the second annular groove 68 is fixedly connected to a second spring 610, one end of the second spring 610 is fixedly connected to one end of the end plate 67, one end of the stainless steel piston head 62 is fixedly connected to a U-shaped rod 611, a through hole 69 is provided in the middle of the end plate 67, the U-shaped rod 611 passes through the through hole 69, one end of the U-shaped rod 611 is fixedly connected to an extrusion end 612, and the diameter of the through hole 69 is 1-2 mm larger than the diameter of the U-shaped rod 611.

[0025] According to the above structure, when the electromagnet 63 loses power, the stainless steel piston head 62 moves to the right driven by the first annular groove 65, and the air between the stainless steel piston head 62 and the retaining ring 64 pushes the end plate 67 to move under pressure. At this time, the end of the U-shaped long shell 61 is opened, so that the air can be discharged quickly, thereby causing the stainless steel piston head 62 to move quickly. When the electromagnet 63 is energized again, the electromagnet 63 attracts the stainless steel piston head 62, and the external air enters the U-shaped long shell 61 through the gap between the U-shaped rod 611 and the side wall of the through hole 69. Since the gap between the side wall of the through hole 69 and the U-shaped rod 611 is small, the air enters slowly, slowing down the speed at which the stainless steel piston head 62 approaches the electromagnet 63, thereby causing the U-shaped rod 611 and the extrusion end 612 to move slowly, so that the extrusion end 612 can squeeze the normally open button switch 5 to close it and supply power to the relay switch 8 after a period of time after the power is switched, thereby avoiding voltage fluctuations caused by too fast power switching and causing damage to electrical components inside the fan.

[0026] The working principle of the utility model is as follows: when the power is lost, the electromagnet 63 is powered off, and the stainless steel piston head 62 moves to the right under the drive of the first annular groove 65. When the power is switched on, the electromagnet 63 is powered on, attracting the stainless steel piston head 62 to move to the left and close to the electromagnet 63. When the electromagnet 63 loses power, the stainless steel piston head 62 moves to the right under the drive of the first annular groove 65. The air between the stainless steel piston head 62 and the retaining ring 64 is under pressure, pushing the end plate 67 to move. At this time, the end of the U-shaped long shell 61 is opened, so that the air can be quickly discharged, so that the stainless steel piston head 62 moves quickly. When the electromagnet 63 is powered on again After being energized, the electromagnet 63 attracts the stainless steel piston head 62, and the external air enters the U-shaped long shell 61 through the gap between the U-shaped rod 611 and the side wall of the through hole 69. Since the gap between the side wall of the through hole 69 and the U-shaped rod 611 is small, the air enters slowly, slowing down the speed at which the stainless steel piston head 62 approaches the electromagnet 63, thereby causing the U-shaped rod 611 and the extrusion end 612 to move slowly, so that after a period of time after the power is switched, the extrusion end 612 can squeeze the normally open button switch 5 to close it and supply power to the relay switch 8, thereby avoiding voltage fluctuations caused by too fast power switching and causing damage to the electrical components inside the fan.

[0027] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A dual power supply box for a fan in a weak current machine room, comprising a box body (1) and a mounting plate (2), characterized in that: The interior of the box (1) is fixedly connected to a mounting plate (2), a power switch (3) is symmetrically mounted on the top of one side of the mounting plate (2), a power conversion switch (4) is fixedly mounted on the top of one side of the mounting plate (2), a normally open push button switch (5) and a pressing component (6) for pressing the normally open push button switch (5) are arranged in the middle of one side of the mounting plate (2), and a plurality of equally spaced relay switches (8) are arranged at the bottom of one side of the mounting plate (2); The pressing assembly (6) comprises a U-shaped long shell (61) fixedly connected to one side of the mounting plate (2); a stainless steel piston head (62) is slidably connected inside the U-shaped long shell (61); an electromagnet (63) is fixedly connected to one end of the U-shaped long shell (61); a retaining ring (64) is fixedly connected inside the U-shaped long shell (61); the stainless steel piston head (62) is arranged between the electromagnet (63) and the retaining ring (64); a first annular groove (65) is provided at one end of the stainless steel piston head (62); a first spring (66) is fixedly connected inside the first annular groove (65); and one end of the first spring (66) is fixedly connected to one end of the retaining ring (64).

2. A dual power supply box for fans in a weak current machine room according to claim 1, characterized in that: A transformer (7) is fixedly mounted on one side of the mounting plate (2), and the electromagnet (63) is electrically connected to the power conversion switch (4) via the transformer (7).

3. A dual power supply box for fans in a weak current machine room according to claim 2, characterized in that: One end of the U-shaped long shell (61) is slidably connected to an end plate (67), one end of the retaining ring (64) is provided with a second annular groove (68), a second spring (610) is fixedly connected inside the second annular groove (68), and one end of the second spring (610) is fixedly connected to one end of the end plate (67).

4. A dual power supply box for fans in a weak current machine room according to claim 3, characterized in that: One end of the stainless steel piston head (62) is fixedly connected to a U-shaped rod (611), a through hole (69) is provided in the middle of the end plate (67), the U-shaped rod (611) passes through the through hole (69), and one end of the U-shaped rod (611) is fixedly connected to an extrusion end head (612).

5. A dual power supply box for fans in a weak current machine room according to claim 4, characterized in that: The diameter of the through hole (69) is 1-2 mm larger than the diameter of the U-shaped rod (611).

6. A dual power supply box for fans in a weak current machine room according to claim 5, characterized in that: The relay switch (8) is electrically connected to the power conversion switch (4) via a normally open push button switch (5), and both of the two power switches (3) are electrically connected to the power conversion switch (4).

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