Pressure-reducing air distributor of non-stop fan reversing ventilation system

Abstract

The utility model relates to a non-stop reverse ventilation system pressure-reducing air distributor, which comprises a pressure-reducing valve body, a pressure-reducing valve sealing ring, a pressure-reducing valve cover plate, a lead screw, a driving handle and a rolling bearing, the pressure-reducing valve body is of a frame structure, the pressure-reducing valve body is welded on an air distributor body, and the pressure-reducing valve sealing ring is arranged in the pressure-reducing valve body; a pressure reducing valve cover plate is arranged on the pressure reducing valve sealing ring; a rolling bearing is arranged on the pressure reducing valve cover plate and connected with a lead screw, the lead screw penetrates through a nut to be connected with a driving handle, and the nut is welded to a panel. The device has the beneficial effects that the problem of no wind in a short time caused by normal overhaul switching of the wind distributor is solved; the problem that the air duct is damaged due to overlarge air pressure when two air ducts are put into use at the same time is solved; and the air speed and the air volume are stable.

Description

Technical Field

[0001] The utility model relates to a pressure reducing device for a ventilation system, in particular to a pressure reducing air distributor for a ventilation system with non-stop air supply during fan changeover. Background Art

[0002] Chinese Patent CN203962020U discloses a mine local ventilation fan air distributor. To ensure continuous air supply to the mine working face, two local ventilation fans are used to supply air to a single duct, with one operating and the other in standby. Once the operating fan fails, the other automatically starts. When performing normal maintenance and switching, this air distributor first shuts down and then starts the standby fan, resulting in a short period of no air supply. If both fans are put into use simultaneously, the excessive air pressure will damage the air duct. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a pressure reducing air distributor for a ventilation system with non-stop air supply during fan changeover.

[0004] The technical solution adopted by the utility model to achieve the above purpose is as follows:

[0005] The pressure reducing air distributor for a ventilation system with non-stop air supply during fan changeover includes a pressure reducing valve body, a pressure reducing valve sealing ring, a pressure reducing valve cover plate, a lead screw, a driving handle, and a rolling bearing. It is characterized in that: the pressure reducing valve body is of a frame structure and is welded to the air distributor body. There is a pressure reducing valve sealing ring inside the pressure reducing valve body; there is a pressure reducing valve cover plate on the pressure reducing valve sealing ring; there is a rolling bearing on the pressure reducing valve cover plate, which is connected to the lead screw. The lead screw passes through a nut and is connected to the driving handle, and the nut is welded to the panel. By shaking the driving handle, the pressure reducing valve cover plate moves within the pressure reducing valve body. When the driving handle is rotated clockwise, the pressure reducing valve cover plate is lifted, and the pressure reducing valve sealing ring is separated from the pressure reducing valve cover plate, and the pressure reducing air distributor releases pressure; when the driving handle is rotated counterclockwise, the pressure reducing valve cover plate is pressed down, and the pressure reducing valve sealing ring fits and seals with the pressure reducing valve cover plate, and the pressure reducing air distributor closes.

[0006] Usage Instructions: The air door assembly 1 is connected to two fans. When it is necessary to switch to the standby fan under the condition that the main ventilation fan is operating normally, without stopping the operation of the main ventilation fan, the pressure reducing valve cover plate 5 is lifted through the driving handle 7, and the pressure in the air duct is released from the pressure relief port. Then the standby fan is started. After the standby fan operates stably, the main ventilation fan is shut down, and the pressure reducing valve cover plate 5 is closed, achieving non-stop air supply at the working face with stable air velocity and air volume, and the main ventilation fan is switched to the standby fan.

[0007] Compared with the prior art, the beneficial effects of the utility model are as follows: It overcomes the problem of short-term no air supply caused during normal maintenance and switching of the air distributor; it overcomes the problem that when both are put into use simultaneously, excessive air pressure will damage the air duct; the air supply at the working face is non-stop and the air velocity and air volume are stable. Description of the Drawings

[0008] Figure 1 It is a schematic diagram of the combination of the pressure-reducing air distributor of the non-stop air-change ventilation system and the air distributor body 2;

[0009] Figure 2 It is a schematic structural diagram of the pressure-reducing air distributor of the non-stop air-change ventilation system of the present utility model;

[0010] Figure 3 It is a schematic structural diagram of the pressure-reducing valve body and the pressure-reducing valve sealing ring;

[0011] Figure 4 It is a schematic structural diagram of the pressure-reducing valve cover plate.

[0012] Explanation of the diagram symbols: 1. Air door assembly; 2. Air distributor body; 3. Pressure-reducing valve body; 4. Pressure-reducing valve sealing ring; 5. Pressure-reducing valve cover plate; 6. Lead screw; 7. Driving handle; 8. Rolling bearing; 9. Nut; 10. Panel. Specific embodiments

[0013] Figure 2 It is a schematic structural diagram of the pressure-reducing air distributor of the non-stop air-change ventilation system of the present utility model; Figure 3 It is a schematic structural diagram of the pressure-reducing valve body and the pressure-reducing valve sealing ring; Figure 4 It is a schematic structural diagram of the pressure-reducing valve cover plate; The pressure-reducing air distributor of the non-stop air-change ventilation system of the present utility model includes a pressure-reducing valve body 3, a pressure-reducing valve sealing ring 4, a pressure-reducing valve cover plate 5, a lead screw 6, a driving handle 7, and a rolling bearing 8. It is characterized in that: the pressure-reducing valve body 3 is of a frame structure, the pressure-reducing valve body 3 is welded to the air distributor body 2, and there is a pressure-reducing valve sealing ring 4 inside the pressure-reducing valve body 3; there is a pressure-reducing valve cover plate 5 on the pressure-reducing valve sealing ring 4; there is a rolling bearing 8 on the pressure-reducing valve cover plate 5, the rolling bearing 8 is connected to the lead screw 6, the lead screw 6 passes through the nut 9 and is connected to the driving handle 7, and the nut 9 is welded to the panel 10; when the driving handle 7 is shaken, the pressure-reducing valve cover plate 5 moves in the pressure-reducing valve body 3. When the driving handle 7 is rotated clockwise, the pressure-reducing valve cover plate 5 is lifted, and the pressure-reducing valve sealing ring 4 is separated from the pressure-reducing valve cover plate 5, and the pressure-reducing air distributor releases pressure; when the driving handle 7 is rotated counterclockwise, the pressure-reducing valve cover plate 5 is pressed down, and the pressure-reducing valve sealing ring 4 is attached to and sealed with the pressure-reducing valve cover plate 5, and the pressure-reducing air distributor is closed.

[0014] The air door assembly 1 is connected to two fans. When it is necessary to switch to the standby fan under the condition that the main ventilator is running normally, without stopping the operation of the main ventilator, the pressure-reducing valve cover plate 5 is lifted through the driving handle 7, the pressure in the air duct is released from the pressure relief port, the standby fan is started, and after the standby fan runs stably, the main ventilator is turned off and the pressure-reducing valve cover plate 5 is closed, so as to achieve non-stop air supply at the working face and stable air velocity and air volume, and the main ventilator is switched to the standby fan.

[0015] The utility model overcomes the problem of short-term windlessness caused by the normal maintenance and switching of the air distributor; overcomes the problem that when two units are put into use simultaneously, the wind pressure is too high, which will cause damage to the air duct; the working face has continuous wind supply and stable wind speed and air volume.

Claims

1. The pressure reducing and air distributing device of the non-stop air change ventilation system includes a pressure reducing valve body, a pressure reducing valve sealing ring, a pressure reducing valve cover plate, a lead screw, a driving handle, and a rolling bearing, and is characterized in that: The pressure reducing valve body is of a frame structure and is welded to the air distributor body. There is a pressure reducing valve sealing ring inside the pressure reducing valve body; there is a pressure reducing valve cover plate on the pressure reducing valve sealing ring; there is a rolling bearing on the pressure reducing valve cover plate. The rolling bearing is connected to a lead screw, and the lead screw passes through a nut and is connected to a driving handle. The nut is welded to the panel; when the driving handle is shaken, the pressure reducing valve cover plate moves within the pressure reducing valve body. When the driving handle is rotated clockwise, the pressure reducing valve cover plate is lifted, and the pressure reducing valve sealing ring is separated from the pressure reducing valve cover plate, and the pressure reducing air distributor releases pressure; when the driving handle is rotated counterclockwise, the pressure reducing valve cover plate is pressed down, and the pressure reducing valve sealing ring fits and seals with the pressure reducing valve cover plate, and the pressure reducing air distributor closes.

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