Aerodynamic check valve

 

(57) Abstract:

The invention relates to ventilyatorostroeniya and concerns the main fan installations ventilation of mines, mainly ghatotkacha installations, in particular to devices for regulating the pressure of the environment. Drag the check valve includes a housing with installed shut-off body is made with the aerodynamic profile of the wing and having a single axis of rotation. The axis of rotation of the locking member is equipped with a cargo mounted on rails for movement. The technical result is to reduce aerodynamic drag and power loss, enhancing explosion-proof fan. 1 C.p. f-crystals, 4 Il.

The invention relates to the field of ventilyatorostroeniya and relates to devices for switching flow of the working fluid (air, gas, etc.) main fan installations ventilation of mines, mainly ghatotkacha installations, in particular to devices for regulating the pressure of the environment.

It is known a device in which to regulate and maintain the pressure during operation of the fan (pump) used goods usesto is adjusted manually by means of a screw, that entails the presence of staff.

A device for regulating the air flow (environment) is used mounted on the axis of the valve placed it in a certain order bodies having the shape of the wing and the axis of rotation of the supplied goods, still located on the guides (German Patent N 545879, CL 47 G8, 1932, 3 HP).

However, installed on the valve governing bodies having the shape of the wing, creating a pipeline of large aerodynamic resistance, which significantly reduces the capacity of the fan or pump, especially at low pressure (angle).

The closest in design to the claimed invention is a device for switching flow with an aerodynamic valve, comprising a housing, and static balanced pressure shut-off organ installed in the asymmetric axis of rotation and having the profile of the aerodynamic wing (Patent of Russia No. 2063580, CL F 24 F 13/08, 1996).

However, the disadvantage of this device is the increased aerodynamic resistance fan operation at low dynamic pressure, i.e. in the mode of depression.

All biseparating, - reduction of aerodynamic drag and power loss, enhancing explosion-proof fan.

The specified technical task is achieved by the fact that the aerodynamic valve includes a housing with installed shut-off body is made with the aerodynamic profile of the wing and having a single axis of rotation, with the axis of rotation of the locking member is equipped with a cargo mounted on the guides can move, however, the valve is provided with stops and limiters.

The invention is illustrated in the drawing, where Fig.1 shows the valve device, the kinematics of the movements and the action of the forces in Fig.2 is a diagram of the valve of Fig.3 - characteristics of the fan network, and Fig.4 - installation of the valve in gazettelive the fan.

Aerodynamic valve includes a housing 1, a balanced static pressure shut-off body (folding doors) 2, with the aerodynamic profile of the wing and mounted on asymmetrical to the axis of rotation 3, mounted in the bearings 4, the guides 5 with weights 6 set to move, the movable limiters 7 and lugs 8.

Drag the check valve operates as about the definition of pressure flow and the resulting lifting force P, rotates around the rotation axis 3, and is installed in a horizontal position limited by a stop 8, aerodynamic drag stream has a minimum value, i.e., the observed inequality

Pxl1> G1x l1+ G x L1,

where torque from the power P is greater than the sum of moments of forces of gravity right side of the valve body 2-G1and cargo 6 - G mounted on the rail 5.

To overcome aerodynamic drag at any given mode of fan operation on the axis of rotation 3, the outside of the housing 1, the supports 4 fixed calibrated guides 5 with weights 6, having a movable limiters 7.

The stops 7 are mounted on the guides 5 in accordance with the specified mode of operation, the loads 6 are located closely to him.

When starting the fan shut-off body 2 takes a horizontal position, the guides 5 are raised up, and the cargo slide 6 in the lower position, i.e. to the axis of rotation 3, with the observed inequality

P x l1> G1x l1+ G x L".

Thus, torque P x l1becomes the minimum allowable with respect to harmful power costs, but before the I and terminate the operation of the fan shut-off body 2 with the guide 5 under the action of torque from gravity (G1x l1+ G x L"), when the desire of torque from the action of the lifting force P to zero, falls and cargo slide 6 to the limiters 7.

With the full stop fan stop valve 2 tightly closes the housing 1 and, respectively, the wellhead.

In Fig.3 characteristics of the fan and the network. The intersection points a, B, C characteristics correspond to the values of the minimum allowable dynamic pressure P dv P dv, R"'dv required for installation of the locking member 2 in a horizontal position with a minimum loss of power. According to these data taruruuto guides 5 cargo 6 and exhibited their limiters 7.

To increase the level of explosion-proof fan and aerodynamic valve lugs 8, the edges of the locking member 2, the loads 6 and the limiter 7 is made of material providing a friction safety, for example of brass.

Thus, the presence of asymmetric to the axis of rotation of the locking member, cargo, installed on tared guides with ability to move, stops and constraints ensures minimum loss of power to overcome drag, and production stops, edges, Zap the guard increases the level of safety design and fan in General.

1. Aerodynamic valve, comprising a housing with installed shut-off body is made with the aerodynamic profile of the wing and having a single axis of rotation, wherein the axis of rotation of the locking member is equipped with a cargo mounted on rails for movement.

2. The valve p. 1, characterized in that it is equipped with stops and stops, and the stops, edges of the locking body, loads, restraints, and guides made of material providing friction intrinsically safe.

 

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FIELD: valving.

SUBSTANCE: valve has seat and member for control of flow rate. The valving member is interposed between the seat and the member and is provided with curved side.

EFFECT: enhanced efficiency.

1 dwg

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