CN209977365U - Venturi valve capable of accurately controlling air quantity - Google Patents

Abstract

The utility model discloses a venturi valve of accurate control amount of wind, including valve body and case, valve body center pin department is equipped with the axostylus axostyle, the axostylus axostyle runs through in the case center, the axostylus axostyle is connected with servo motor, servo motor is used for driving the axostylus axostyle to rotate and makes the case displacement on the axostylus axostyle. The utility model discloses control accuracy is high, reaction rate is fast.

Description

Venturi valve capable of accurately controlling air quantity

Technical Field

The utility model relates to an amount of wind control technical field, especially a venturi valve of accurate control amount of wind.

Background

The venturi effect, also known as the venturi effect. This phenomenon is named after its finder, the Italian physicist Venturi (Giovanni Battista Venturi). This effect is manifested in the phenomenon that the flow rate of the fluid increases when the restricted flow passes through a reduced flow section, the flow rate of which is inversely proportional to the flow section. While it is known from bernoulli's law that an increase in flow velocity is accompanied by a decrease in fluid pressure, a common venturi phenomenon. Colloquially, this effect is the creation of low pressure in the vicinity of a high velocity flowing fluid, thereby creating an adsorption effect. A venturi can be made using this effect.

A venturi valve is a valve manufactured using the principles of the venturi effect. High velocity flow of liquid creates low pressure and thus has an adsorption effect. The venturi flow control valve combines a mechanical pressure independent regulator with a high speed flow controller to extend flow control to a maximum level. Through the aerodynamic design, the valve has silent working performance. The automatic pressure balancing device with fast reaction provides reliable dust collection and indoor pressure control for the fume hood. The Venturi valve is not influenced by the pressure change of the air pipe, the air quantity control range is wide from 60m3/h to 10,000m3/h, the reaction is rapid (less than 1 second), the adjustment is accurate (+/-5 percent), and the like.

The inner structure of the Venturi valve utilizes the cylindrical guide rail to realize the middle-low speed reciprocating motion of the cone module in the linear direction, thereby controlling and adjusting the opening degree of air flow passing under different wind pressures, and ensuring the accuracy and reliability of the linear guide rail under complicated and severe gas working conditions is generally a difficult problem in engineering.

CN208871117U discloses a venturi valve, comprising: a venturi valve body; the Venturi valve body is made of carbon fiber materials; a valve cone disposed within the venturi valve body; a shaft extending through said venturi valve cone, wherein said valve cone is slidable along said shaft; a drive assembly coupled to said venturi valve body and said shaft for driving rotation of said shaft; the piston is arranged in the valve cone and fixed on the shaft rod; and the elastic element is arranged in the valve cone and sleeved on the shaft lever, and two ends of the elastic element are respectively contacted with the piston and the valve cone.

The existing Venturi valve adopts the action of an external actuator, the actuator drives a valve core to move through linkage of a driving connecting rod, and the valve core moves to cause the change of air volume. Specifically, the actuator pushes the driving connecting rod, and the driving connecting rod pushes the valve core to move through the shaft on the valve body in a reversing way.

The valve core of the prior technical scheme is adjusted by the driving connecting rod, and the positioning performance is poor. The mechanical structure is complicated, the quality of the connecting rod is directly related to the adjusting performance of the valve core, and the mechanical error of the connecting rod exists. Feedback signals of the actual position of the valve core cannot be given, and the mechanical regulation does not have the extended functions of signal remote transmission, display and the like.

Disclosure of Invention

To the problem that exists among the prior art, the utility model provides a venturi valve that control accuracy is high, reaction rate is fast.

The purpose of the utility model is realized through the following technical scheme.

The venturi valve capable of accurately controlling the air volume comprises a valve body and a valve core, wherein a shaft rod is arranged at the central shaft of the valve body and penetrates through the center of the valve core, the shaft rod is connected with a servo motor, and the servo motor is used for driving the shaft rod to rotate so that the valve core can displace on the shaft rod.

The servo motor is in communication connection with the air volume controller, receives the valve core control signal and feeds back a valve core position signal to the air volume controller.

The communication connection is a communication cable connection or a wireless communication connection.

Compared with the prior art, the utility model has the advantages of:

1. the servo control is adopted, the corresponding relation between the air quantity and the position of the valve core is directly utilized for adjustment, no external mechanical connecting rod structure exists, and no connecting rod transmission error exists.

2. The control signal and the position signal of the valve core can be received and output through a communication cable or directly.

3. The servo motor can receive external air volume adjusting control signals and drive the shaft lever positioning valve core.

4. The structure is simple, the sealing performance is good, the control precision is high, and the precision of the servo control stroke can reach more than 0.1 millimeter.

5. The reaction speed is high, and the servo motor controls the reaction speed to reach 0.1 second.

6. Different control reaction speeds can be realized according to different control requirements.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. valve body 2, axostylus axostyle 3, case 4, servo motor 5, communication cable.

Detailed Description

The invention is described in detail below with reference to the drawings and specific examples.

As shown in fig. 1, the venturi valve for accurately controlling the air volume comprises a valve body 1 and a valve core 3, wherein a shaft rod 2 is arranged at the central axis of the valve body 1, the shaft rod 2 penetrates through the center of the valve core 3, the shaft rod 2 is connected with a servo motor 4, and the servo motor 4 is used for driving the shaft rod 2 to rotate so as to enable the valve core 3 to displace on the shaft rod 2.

The servo motor 4 is connected with the air volume controller through a communication cable 5, and the servo motor 4 receives a valve core control signal and feeds back a valve core position signal to the air volume controller.

Claims (3)

1. The Venturi valve capable of accurately controlling the air quantity comprises a valve body and a valve core and is characterized in that a shaft rod is arranged at the central shaft of the valve body and penetrates through the center of the valve core, the shaft rod is connected with a servo motor, and the servo motor is used for driving the shaft rod to rotate so that the valve core can be displaced on the shaft rod.

2. The venturi valve of claim 1, wherein the servo motor is in communication with the air volume controller, the servo motor receiving the spool control signal and feeding back the spool position signal to the air volume controller.

3. The venturi valve of claim 1, wherein said communication link is a communication cable link or a wireless communication link.

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