CN220668558U - Variable air volume venturi valve for air volume collection - Google Patents

Abstract

The utility model discloses an air quantity collection variable air quantity venturi valve, and relates to the technical field of variable air quantity venturi valves. Compared with the existing common variable air volume venturi valve, the variable air volume venturi valve has the advantages that the venturi effect of the valve body can generate higher static pressure at the positive static pressure collecting pipe at the middle position of the valve body when air flows pass through the valve body, and the negative static pressure collecting pipe at the outlet of the valve body generates lower static pressure, so that an actuator is started to operate, the error of the current real-time air volume and the required air volume is compared according to the real-time signal collected by the differential pressure sensor, and the error is used for accurately adjusting the opening of the valve, so that the requirement of high-precision air volume control is met.

Description

Variable air volume venturi valve for air volume collection

Technical Field

The utility model relates to the technical field of variable air volume venturi valves, in particular to an air volume collection variable air volume venturi valve.

Background

The variable air volume Venturi valve is mainly used for the purposes of laboratory, clean place air supply and exhaust, ventilation cabinet air exhaust and the like, and is characterized by short reaction time, high control precision, irrelevant pressure and the like. The venturi valve mainly comprises a valve body, an actuating mechanism and a control part, wherein the venturi valve is divided into a push rod type venturi valve and an angle actuator type venturi valve according to different actuator types, and the push rod type venturi valve and the angle actuator type venturi valve are used in various application occasions.

If the application number is CN202221646047.1, the continuous working time of the analog angle actuator can be prolonged by adopting the analog angle actuator to replace the push rod actuator, the overheat fault of the motor is reduced, the problem that the valve is not supported to continuously act for a long time is solved, overload work of the push rod motor causes overheat, and then the actuator breaks down, and the valve loses the control function, but the variable air volume venturi valve has poor effect on solving the problem that the air volume feedback value is low caused by calculating the air volume due to the valve control precision influenced by calibration error and field interference factors of the existing venturi valve.

Accordingly, in view of the above, an air volume collection type variable air volume venturi valve has been proposed, which is improved against the shortcomings of the conventional structure.

Disclosure of Invention

The utility model aims to provide an air quantity collection type variable air quantity venturi valve so as to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the variable air volume Venturi valve comprises a controller and an actuator, wherein a valve body is arranged below the controller, a valve core is arranged inside the valve body, a positive static pressure collecting pipe is arranged above the controller, a negative static pressure collecting pipe is arranged on the right side of the controller, and the actuator is arranged below the negative static pressure collecting pipe.

Preferably, a first fixing block is arranged in front of the outer surface of the front of the controller, and a first bolt is arranged above the outer surface of the waste velvet of the first fixing block.

Preferably, a first clamping block is arranged in the first fixing block, and a telescopic spring is arranged on the right side of the first clamping block.

Preferably, a first sliding groove is formed in the rear of the first clamping block, two first sliding grooves are symmetrically formed in the center of the first fixing block, and a differential pressure sensor is arranged in the controller.

Preferably, the valve core is connected with the valve body in a penetrating way, the central axis of the valve body coincides with the central axis of the valve core, and the controller is fixedly connected with the valve body.

Preferably, the first bolt is in threaded connection with the first fixing block, the central axis of the first bolt is perpendicular to the upper portion of the outer surface of the first fixing block, and the first bolt is in threaded connection with the first clamping block.

Preferably, the first clamping block is in sliding connection with the first fixing block through the first sliding groove, and the first clamping block is symmetrically provided with two along the center of the first fixing block.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, through the arrangement of the controller, the valve body, the valve core, the positive static pressure collecting pipe, the negative static pressure collecting pipe and the actuator, when the valve body passes through the air flow, the venturi effect of the valve body can generate higher static pressure at the positive static pressure collecting pipe at the middle position of the valve body, the negative static pressure collecting pipe at the outlet of the valve body generates lower static pressure, the two static pressures are connected with the differential pressure sensor arranged in the controller through the static pressure pipe, the differential pressure sensor converts static pressure signals into differential pressure signals and uploads the differential pressure signals to the controller, so that the controller can convert real-time differential pressure data into real-time air volume data through calculation, the actuator is started to operate, the valve core in the valve body is pushed to change in position, and when the valve is in place, the controller compares the current real-time air volume with the error of the required air volume according to the real-time signals collected by the differential pressure sensor, and uses the error in accurate adjustment of the valve opening, thereby meeting the requirement of high-precision air volume control and reducing the error of the valve;

2. according to the utility model, through the arrangement of the first fixed block, the first bolt, the first clamping block, the telescopic spring and the first sliding chute, the first clamping block is pressed to enable the first clamping block to move along the first sliding chute, the telescopic spring is compressed, the positive static pressure collecting pipe is placed in the first fixed block, the first clamping block is loosened to clamp the positive static pressure collecting pipe, and the first clamping block is fixed through the first bolt, so that the positive static pressure collecting pipe is conveniently wired, and the positive static pressure collecting pipe is prevented from being damaged by the operation of an actuator.

Drawings

FIG. 1 is a schematic view of the overall three-dimensional, partially cut-away structure of the present utility model;

FIG. 2 is a schematic diagram of a front view structure of the present utility model;

FIG. 3 is a schematic perspective view of a first fixing block according to the present utility model;

fig. 4 is a schematic top sectional view of a first fixing block according to the present utility model.

In the figure: 1. a controller; 2. a valve body; 3. a valve core; 4. positive static pressure collection tube; 5. a negative static pressure collection tube; 6. an actuator; 7. a first fixed block; 8. a first bolt; 9. a first clamping block; 10. a telescopic spring; 11. a first chute; 12. a differential pressure sensor.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-2, the variable air volume venturi valve for air volume collection comprises a controller 1 and an actuator 6, wherein a valve body 2 is arranged below the controller 1, a valve core 3 is arranged inside the valve body 2, a positive static pressure collection pipe 4 is arranged above the controller 1, a negative static pressure collection pipe 5 is arranged on the right side of the controller 1, and the actuator 6 is arranged below the negative static pressure collection pipe 5.

Further, the valve core 3 is connected with the valve body 2 in a penetrating way, the central axis of the valve body 2 coincides with the central axis of the valve core 3, the controller 1 is fixedly connected with the valve body 2, when the valve body 2 passes through the air flow, the venturi effect of the valve body 2 can generate higher static pressure at the positive static pressure collecting pipe 4 at the middle position of the valve body 2, the negative static pressure collecting pipe 5 at the outlet of the valve body 2 generates lower static pressure, the two static pressures are connected with the differential pressure sensor 12 arranged in the controller 1 through the static pressure pipes, the differential pressure sensor 12 converts the static pressure signals into differential pressure signals and uploads the differential pressure signals to the controller 1, so that the controller 1 can convert the real-time differential pressure data into real-time air volume data through calculation, the actuator 6 is started to operate, the valve core 3 in the valve body 2 is pushed to change the position, after the valve is in place, the controller compares the error between the current real-time air volume and the required air volume according to the real-time signals collected by the differential pressure sensor 12, and the error is used for accurately adjusting the opening degree of the valve, thereby meeting the requirement of high-precision air volume control, and reducing the error of the valve.

As shown in figures 3-4 of the drawings,

further, a first fixing block 7 is arranged in front of the front outer surface of the controller 1, and a first bolt 8 is arranged above the waste velvet outer surface of the first fixing block 7.

Further, the inside of first fixed block 7 is provided with first fixture block 9, and the right side of first fixture block 9 is provided with expansion spring 10, and first bolt 8 and first fixed block 7 threaded connection, and the axis of first bolt 8 is perpendicular to the surface top of first fixed block 7, first bolt 8 and first fixture block 9 threaded connection make first fixture block 9 remove through pressing first fixture block 9 to compression expansion spring 10.

Further, first spout 11 has been seted up at the rear of first fixture block 9, and first spout 11 has seted up two along the central symmetry of first fixed block 7, the inside of controller 1 is provided with pressure differential sensor 12, first fixture block 9 passes through first spout 11 and first fixed block 7 sliding connection, and first fixture block 9 is provided with two along the central symmetry of first fixed block 7, make first fixture block 9 remove along first spout 11 through pressing first fixture block 9, and compress expansion spring 10, place positive static pressure collection pipe 4 to the inside of first fixed block 7, carry out the centre gripping to positive static pressure collection pipe 4 at unclamping first fixture block 9, and fix first fixture block 9 through first bolt 8, thereby be convenient for carry out the winding displacement to positive static pressure collection pipe 4, prevent that positive static pressure collection pipe 4 from receiving executor 6 operation damage.

Working principle: when the variable air volume venturi valve for collecting air volume is used, firstly, when air flows pass through the valve body 2, the venturi effect of the valve body 2 can generate higher static pressure at the positive static pressure collecting pipe 4 at the middle position of the valve body 2, the negative static pressure collecting pipe 5 at the outlet of the valve body 2 generates lower static pressure, the two static pressures are connected with the differential pressure sensor 12 arranged in the controller 1 through the static pressure pipes, the model of the differential pressure sensor 12 is LFM108, the differential pressure sensor 12 converts a static pressure signal into a differential pressure signal and uploads the differential pressure signal to the controller 1, so that the controller 1 can convert real-time differential pressure data into real-time air volume data through calculation, thereby starting the actuator 6 to operate, pushing the valve core 3 in the valve body 2, changing the position of the valve core 3 after the valve acts in place, the controller compares the error of current real-time air quantity and required air quantity according to the real-time signal acquired by the differential pressure sensor 12, and uses the error for accurately adjusting the opening degree of the valve, thereby meeting the requirement of high-precision air quantity control, reducing the error of the valve, enabling the first clamping block 9 to move along the first sliding chute 11 by pressing the first clamping block 9, compressing the telescopic spring 10, placing the positive static pressure collecting tube 4 into the first fixing block 7, clamping the positive static pressure collecting tube 4 by loosening the first clamping block 9, and fixing the first clamping block 9 by the first bolt 8, thereby being convenient for arranging the positive static pressure collecting tube 4, preventing the positive static pressure collecting tube 4 from being damaged by the operation of the actuator 6, namely the working principle of the air quantity collection type variable air quantity venturi valve.

Claims (7)

1. The utility model provides a variable air volume venturi valve is gathered to amount of wind, includes controller (1) and executor (6), its characterized in that, the below of controller (1) is provided with valve body (2), and the inside of valve body (2) is provided with case (3), the top of controller (1) is provided with positive static pressure collection pipe (4), and the right side of controller (1) is provided with negative static pressure collection pipe (5), the below in negative static pressure collection pipe (5) is installed to executor (6).

2. The variable air volume venturi valve for air volume collection according to claim 1, wherein a first fixing block (7) is arranged in front of the front outer surface of the controller (1), and a first bolt (8) is arranged above the outer surface of the waste velvet of the first fixing block (7).

3. The variable air volume venturi valve for air volume collection according to claim 2, wherein a first clamping block (9) is arranged in the first fixing block (7), and a telescopic spring (10) is arranged on the right side of the first clamping block (9).

4. The variable air volume venturi valve for air volume collection according to claim 3, wherein a first sliding groove (11) is formed in the rear of the first clamping block (9), the first sliding groove (11) is symmetrically formed in two along the center of the first fixing block (7), and a differential pressure sensor (12) is arranged in the controller (1).

5. The variable air volume venturi valve with air volume collection according to claim 1, wherein the valve core (3) is connected with the valve body (2) in a penetrating manner, the central axis of the valve body (2) coincides with the central axis of the valve core (3), and the controller (1) is fixedly connected with the valve body (2).

6. A variable air volume venturi valve according to claim 3, wherein the first bolt (8) is in threaded connection with the first fixed block (7), the central axis of the first bolt (8) is perpendicular to the upper part of the outer surface of the first fixed block (7), and the first bolt (8) is in threaded connection with the first clamping block (9).

7. The variable air volume venturi valve for air volume collection according to claim 4, wherein the first clamping blocks (9) are slidably connected with the first fixed blocks (7) through the first sliding grooves (11), and the first clamping blocks (9) are symmetrically arranged in two along the center of the first fixed blocks (7).