RU2552986C1 - Air flow rate control device - Google Patents

Abstract

FIELD: ventilation.

SUBSTANCE: device contains the vertically arranged air duct housing with the end face hole, the valves and the petal punched orifices installed under the end face hole on vertical axes with the resetting mechanism. Under the air duct housing the hollow oval casing in the form of two bent branch pipes with two horizontally located windows facing towards mutually opposite sides and the common face hole is located. The valves are installed in casing windows with a possibility of rotation around axes. On the axes ends the bushings are located. Petal diaphragms are rigidly fixed under its lower face hole, on concentrically installed bushings, located on bushings of vertical axes of valves, oval bent branch pipes of the casing are fastened to the face hole of the housing with a possibility of change of tilt angle with reference to it, and the concentrically installed bushings are fixed to bushings of axes with a possibility of change of position of orifice petals in the horizontal plane.

EFFECT: expansion of scope of application, possibility of use both in exhaust, and in the input ventilation systems.

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Description

The invention relates to a device for creating a microclimate in industrial premises and can be used for air exchange.

A device for regulating air flow, comprising a housing with a valve installed inside in the form of a sash, mounted on an axis (SU No. 1260644, 09.30.86. Bull. No. 36).

The disadvantage of this device is the significant material consumption and dimensions of the housing in height, which limits its use in buildings. In addition, the device is only suitable for installation on air extraction systems, i.e. has a narrow functional purpose.

A device for regulating air flow, comprising a housing with a valve installed inside in the form of a leaf fixed on an axis (Patent RU No. 2277206. Publ. 27.05.2006. Bull. No. 15).

The disadvantage of this device is the low quality of regulation with a decrease in size, since with their decrease the area of the sash decreases, and accordingly the sensitivity of the regulator decreases. In addition, the regulator can only work under the cut, i.e. in exhaust ventilation systems, and accordingly has a small scope.

The closest in technical essence is a device for regulating air flow, containing a vertically placed duct housing with an end hole, valves installed under it on vertical axes and perforated diaphragms with a mechanism for returning them to their initial position (Patent RU No. 2487303 C1, F24F 11 / 00 Application: 2012119114/12, 05/10/12. Publish. 07/10/2013. Bull. No. 19).

The disadvantage of this device is that it can only be used in exhaust ventilation systems.

The technical essence of the present invention is the expansion of the scope, i.e. possibility of application in supply ventilation systems.

The present technical essence is achieved by the fact that in the device for controlling the air flow comprising a vertically placed duct housing with an end hole, valves and petal perforated diaphragms mounted under it on the vertical axes with a mechanism for returning them to their initial position, a hollow oval casing is placed under the duct housing in the form of two elbow nozzles with two horizontally located windows directed in mutually opposite directions and a common end hole, valve Ans are installed in the casing windows with the possibility of rotation around the axes, bushings are placed at the ends of the axes, and the flap diaphragms are rigidly fixed under its lower end hole, on concentrically mounted bushings placed on the bushes of the vertical axes of the valves, while the oval elbow casing nozzles are attached to the end hole housing with the ability to change the angle of inclination relative to it, and concentrically mounted bushings are fixed to the axle bushings with the ability to change the position of the aperture blades in the burn the horizontal plane.

Figure 1 shows a diagram of the device, adjusted to work in the supply air duct.

Figure 2 shows a diagram of a device adjusted for operation on an exhaust duct.

The device for controlling the air flow contains a vertically placed duct body 1 with an end hole 2 (for example, the lower base of the supply shaft when air is supplied from the roof space in the building with an attic), in the lower part of which two knee-shaped nozzles are fixed to the hinges 3, directed in opposite directions 4, forming a hollow oval casing, with latches 5 and axles 6. At the ends of the axles 6 through the bushings of 7 axes and concentric bushings 8 mounted on them, in the windows of the nozzles 4 are installed, respectively GOVERNMENTAL, valves 9 and the pitch of the diaphragm 10, lying in a horizontal plane and having perforations 11. The sleeves 8 are provided with retainers 12 and are rotatable on the bushings 7, thereby providing a possibility of changing the position of the petals 10 of the diaphragm in the horizontal plane. The return mechanisms of the valves 9 and the petals 10 to the initial position are springs 13, one end attached to the nozzles 4, and the second to the valves 9.

The device can be used both in exhaust and supply ventilation systems with appropriate settings for the operating mode. Adjustment can be carried out both during the manufacturing process and after installation.

Example 1. The setting to work in the supply ventilation system is presented in figure 1. The nozzles 4 are attached to the housing 1 in such a way that there is an inclination of the axles 6 into the housing 1. This is achieved by turning the nozzles 4 on the hinges 3 while holding the clamps in a predetermined position 5. The device for controlling the air flow in the air intake mode works as follows.

In the absence of a pressure drop, the valves 9 and the petals 10 connected by means of the clamp 12 and the bushings 7 and 8 are removed from the housing 1 due to the inclination of the axles 6 and the springs 13. The living section of the regulator housing is currently maximum. That is, the hole 2 (for example, the lower base of the supply shaft) is fully open. In the presence of a pressure differential between the input and output of the regulator, air movement appears in the cavity of the housing 1 of the duct. The pressure from the inside of the regulator is transmitted to the surface of the valves 9. Valve 9 on the bushings 7, overcoming the counteraction from its own weight, given the angle of inclination of the axes 6, rotate. With a further increase in the pressure drop, the reaction of the springs 13 begins. The angle of rotation of the valves 9 in the cavities of the nozzles 4 and rigidly connected to them in pairs by means of latches 12 (for example, a locking bolt) and the bushings 7, 8 and the petals 10 concentrically mounted on the axes 6. Petals 10 with perforation 11, mounted on the sleeves 8 in the horizontal plane, when turning, cover the hole 2 at the same angle. At the maximum design pressure, the petals 10 rotate all the way (not shown in the drawing), i.e. at the maximum given angle. The total perforation area of the 11 aperture blades provides a predetermined air flow rate when the hole 2 is completely covered by the surface of the blades 10. When the pressure drop between the inlet and outlet of the regulator decreases, everything works in the reverse order. The control range is determined by the stiffness of the springs 13. The sensitivity is determined by the angle of inclination of the nozzles 4 on the hinges 3 with clamps 5 (for example, a screw pair), and accordingly the axes 6. Joint resistance to the force of excess pressure (power function) of the forces of the springs 13 (linear function) and forces from the weights of the angled valves 9 and the petals 10 (trigonometric function) can improve the stability of the controller.

Example 2. Setting up for work in the exhaust ventilation system is presented in figure 2.

To transfer the controller to the reverse mode of operation, the clamps 12 are loosened, the petals 10 are rotated together with the bushings 8 on the bushings 7 concentrically installed in them, until the petals 10 are fully inserted into the nozzles 4. In this position, the bushings 8 are fixed to the bushings 7 by clamps 12. Latches 5 (for example, turning a bolt) tilt the nozzles 4 on the hinges 3 so that there is an inclination of the axles 6 outward from the housing 1.

A device for controlling the air flow in the air exhaust mode operates as follows.

In the absence of a pressure differential between the input and output of the valve regulator 9, the springs 13 are withdrawn from the regulator body 1 and the live section of the regulator body is maximum, i.e. hole 2 (for example, the bottom base of the exhaust shaft) is fully open. In the presence of a pressure differential between the input and output of the regulator, air movement appears in the cavity of the housing 1 of the duct. The pressure from the outside of the regulator is transmitted on the surface of the valves 9, the latter on the bushings 7, overcoming the counteraction from the dead weight set by the angle of inclination of the axes 6, rotate. With a further increase in pressure drop, the reaction of the springs 13 begins. The angle of rotation of the petals 10 in the cavity of the housings 4 and rigidly connected to them in pairs by means of clamps 12 (for example, a locking bolt) and the hubs 7, 8 and valves 9 concentrically mounted on the axes 6 is the same. Petals 10 with perforation 11, mounted in a horizontal plane on the bushings 8, when turning, cover the hole 2 at the same angle. At the maximum design differential pressure, the petals 10 are rotated all the way (not shown) to the maximum specified angle. The total perforation area 11 provides a given air flow rate when the hole 2 is completely covered by the surface of the petals 10. When the pressure differential between the inlet and outlet of the regulator decreases, everything works in the reverse order.

Claims (1)

A device for regulating air flow, comprising a vertically placed duct housing with an end hole, valves and petal perforated diaphragms mounted under it on the vertical axes with a mechanism for returning them to their initial position, characterized in that a hollow oval casing in the form of two elbow nozzles is placed under the duct housing with two horizontally located windows directed in mutually opposite directions and a common end hole, the valves are installed in the casing windows with the possibility of rotation around the axes, bushings are placed at the ends of the axles, and the flap diaphragms are rigidly fixed under its lower end hole, on concentrically mounted bushings placed on the bushings of the vertical axes of the valves, while the oval elbow-shaped nozzles of the casing are attached to the end hole of the casing with the possibility of changing the angle of inclination relative to it, and concentrically mounted bushings are fixed to the axle bushings with the possibility of changing the position of the diaphragm blades in the horizontal plane.

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