Venturi aerodynamic fan

Abstract

The utility model discloses a kind of venturi pneumatic fans, including annular machine base, low pressure air ring and rotating adjusting sleeve. The front end of the annular machine base of venturi fan is provided with diffusion pipe, the annular seat of low pressure air ring, is set in the rear portion of air jet ring, the inside of low pressure air ring is provided with annular air duct, and annular air duct is provided with air inlet pipe. Pressure regulator is provided on low pressure air ring, and the adjusting sleeve of pressure regulator is connected between low pressure air ring by screw thread movable connection. Low pressure air enters air inlet pipe, and air supply work is carried out by being sprayed from the sleeve opening of adjusting sleeve. The opening size of the sleeve opening of rotating adjusting sleeve, the pressure and flow of low pressure air spray are adjusted. The utility model can use high pressure air or low pressure air two kinds of driving air supply work, effectively utilize surplus low pressure air, and energy-saving effect is superior.

Description

Technical Field

[0001] This utility model relates to a Venturi pneumatic fan, and pertains to the field of ventilation equipment technology. Background Technology

[0002] A Venturi blower is a device that operates using the Venturi effect. It generates negative pressure in the converging section through high-speed airflow to achieve both intake and exhaust functions. It is widely used in industrial ventilation, dust removal, and waste gas treatment, among other explosion-proof technologies. Existing Venturi blowers operate using high-pressure compressed air, and their air delivery efficiency significantly decreases when the compressed air pressure drops below 4.2 kg / m³. Especially in scenarios with surplus low-pressure air, the existing structure of Venturi pneumatic blowers is unsuitable; further structural improvements to the Venturi pneumatic blower are needed. Summary of the Invention

[0003] The purpose of this invention is to provide a Venturi pneumatic fan that can be driven by high-pressure or low-pressure air to meet the requirements of explosion-proof ventilation.

[0004] In view of the above-mentioned technical problems, this utility model provides a Venturi pneumatic blower, including an annular base, a low-pressure air ring, and a rotary adjusting sleeve. A diffuser is provided at the front end of the annular base of the Venturi blower, and an annular flow channel is provided in the jet ring of the annular base, which communicates with the inlet pipe; an inlet valve is provided on the inlet pipe, and several jet holes are provided on the jet ring. An annular seat of the low-pressure air ring is located at the rear of the jet ring, and an annular air channel is provided inside the low-pressure air ring, with an inlet pipe provided on the annular air channel. A pressure regulator is provided on the low-pressure air ring, and the adjusting sleeve of the pressure regulator is connected to the low-pressure air ring by a threaded connection. Low-pressure air enters the inlet pipe and is ejected from the sleeve opening of the adjusting sleeve for air delivery. The pressure and flow rate of the ejected low-pressure air are adjusted by rotating the opening size of the adjusting sleeve.

[0005] Preferably, a pneumatic control valve is installed on the air inlet pipe; the cylinder of the pneumatic control valve is connected to the air inlet pipe at the lower part of the air inlet valve. When the air inlet valve is open, high-pressure air is supplied, and when the air inlet pipe is closed, the pneumatic control valve is open, low-pressure air is supplied. Beneficial effects

[0006] Based on the above technical solution, this utility model has at least one of the following beneficial effects: 1. This utility model provides a Venturi pneumatic fan that uses a low-pressure air ring with adjustable flow and pressure inside the annular base to drive explosion-proof air delivery by using low-pressure air. It effectively utilizes pressurized exhaust gas discharged from pneumatic motors and low-pressure gas surplus from high-pressure fans. It has a simple structure, high air delivery efficiency, and excellent energy-saving effect. 2. It adopts a pneumatic control valve for linkage operation, automatically switching between high-pressure air drive and low-pressure air drive modes, and has a simple and practical structure. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the operation of a Venturi pneumatic fan according to this utility model.

[0008] Explanation of main attached symbols 1-Venturi blower; 2-Annular base; 3-Diffuser; 4-Jet ring; 5-Jet orifice; 6-Low-pressure air ring; 7-Annular flow channel; 9-Annular air duct; 10-Inlet pipe; 8-Annular seat; 12-Inlet pipe; 13-Inlet valve; 14-Pressure regulator; 15-Adjusting sleeve; 16-Sleeve opening; 17-Pneumatic control valve; 18-Cylinder. Detailed Implementation

[0009] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0010] like Figure 1 As shown, a Venturi pneumatic blower includes an annular base 2, a jet ring 4, a low-pressure air ring 6, and a pneumatic control valve. A diffuser 3 is provided at the front end of the annular base 2 of the Venturi blower 1. An annular flow channel 7 is provided in the jet ring 4 of the annular base 2; the annular flow channel 7 communicates with an inlet pipe 12, and an inlet valve 13 is provided on the inlet pipe 12. Several jet holes 5 are provided on the jet ring 4. An annular seat 8 of the low-pressure air ring 6 is located at the rear of the jet ring 4. An annular air duct 9 is provided inside the low-pressure air ring 6, and an inlet pipe 10 is provided on the annular air duct 9. A pressure regulator 14 is provided on the low-pressure air ring 6, and the adjusting sleeve 15 of the pressure regulator 14 is connected to the low-pressure air ring 6 by a threaded connection. Low-pressure air enters the air inlet pipe 10 and is ejected from the sleeve opening 16 of the adjusting sleeve 15 for air supply. By rotating the adjusting sleeve 15, the opening size of the sleeve opening 16 can be adjusted according to the low-pressure air pressure, thereby regulating the pressure and flow rate of the ejected low-pressure air to ensure the air supply effect. A pneumatic control valve 17 is installed on the air inlet pipe 10. The cylinder 18 of the pneumatic control valve 17 is connected to the air inlet pipe 12 below the air inlet valve 13. When the air inlet valve 13 is open, high-pressure air supply is performed; when the pneumatic control valve 17 is closed, the air inlet pipe 10 is closed. When the air inlet valve 13 is closed, the pneumatic control valve 17 opens under the action of a spring to perform low-pressure air supply. The pneumatic control valve 17 operates in tandem, automatically switching between high-pressure and low-pressure air drive modes.

[0011] This concludes the description of the embodiments of this utility model.

[0012] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A Venturi pneumatic blower characterized by, include: A diffuser (3) is provided at the front end of the annular base (2) of the Venturi blower (1). An annular flow channel (7) is provided in the jet ring (4) of the annular base (2). The annular flow channel (7) is connected to the inlet pipe (12). An inlet valve (13) is provided on the inlet pipe (12). Several jet holes (5) are provided on the jet ring (4). The annular seat (8) of the low-pressure air ring (6) is located at the rear of the jet ring (4). An annular air ring (6) is provided inside the low-pressure air ring (6). The annular air duct (9) is provided with an air inlet pipe (10), and the low-pressure air ring (6) is provided with a pressure regulator (14). The regulating sleeve (15) of the pressure regulator (14) is connected to the low-pressure air ring (6) by a threaded connection. Low-pressure air enters the air inlet pipe (10) and is ejected from the sleeve opening (16) of the regulating sleeve (15) for air supply. The opening size of the sleeve opening (16) of the regulating sleeve (15) is rotated to adjust the pressure and flow rate of the low-pressure air.

2. A venturi pneumatic blower according to claim 1, characterised in that: A pneumatic control valve (17) is provided on the air inlet pipe (10). The cylinder (18) of the pneumatic control valve (17) is connected to the air inlet pipe (12) at the lower part of the air inlet valve (13). When the air inlet valve (13) is open, it performs high-pressure air supply. When the pneumatic control valve (17) is closed, the air inlet pipe (10) is closed. When the air inlet valve (13) is closed, the pneumatic control valve (17) is open, it performs low-pressure air supply.

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