CN2781102Y - Electric dynamic regulation air valve with mechanical self-operated high-precision automatic blast pressure balance - Google Patents

Abstract

The utility model discloses an air valve, which is aimed to provided with an electric dynamic regulating air valve which has a self-force type automatic air pressure balancing function and can be applied to a low-pressure air system. Both sides of the interior of the electric air valve are respectively provided with a light valve plate which is arranged on a valve body; both sides of the interior of the electric air valve are respectively provided with a flexural spring which is arranged on the valve body and is pressed on one surface of the valve plate after being initially deformed; the middle part of the valve body is provided with a diversion stop bar, and the middle of the stop bar is provided with a position spring and a plugging and beating screw nail; the upper parts of the windward surfaces of the two symmetrical valve plates are fixedly connected with both ends of a flexural spring sheet with a symmetrical structure; the center of the flexural spring sheet is provided with a circular hole and is hinged on the plugging and beating screw nail, the other end of the plugging and beating screw nail is in contact with the outer edge of a cam, and a rotation shaft can drives the cam to rotate. The utility model is not influenced by the pressure fluctuation of a pipe network of an air system, and the flow of the air valve can be regulated from 0% to 100%. The utility model has the advantages of high controlling precision, good consistency, long service life, good air flow organization, simple structure and easy manufacture.

Description

Machine Self-supporting Type High Precity Automatic Air-pressure Balance Power Dynamci Accommodation Air Valve

Technical field

The utility model relates to a kind of air-valve, and more particularly, the utility model relates to a kind of electronic dynamic adjustments air-valve that has the High Precision Automatic pressure balance function of mechanical self-powering type, can be applicable to low pressure air system.

Background technique

In a large amount of air systems, all relate to the application of Electric air valve, decide air quantity gas flow modulation or the like as technological requirement on the air flow control of air-conditioning supply air system, the industrial production line, need the equilibrium problem of resolution system resistance equally for fluid pipe network wind system, the electronic dynamic adjustments air-valve that therefore has the High Precision Automatic pressure balance function of mechanical self-powering type is the best means that solves air pipe network pressure balance and Flow-rate adjustment.

The adjusting and the control gear that are applied to heavy caliber, high-precision air mass flow at present generally adopt gas flow sensor, intelligent controller and adjusting air-valve etc. to form the complicated and expensive control system of a cover.The small-bore mechanical self-powering type of certain import brand of just having applied is recently decided blast regulator and is also belonged to a kind of electronic dynamic adjustments air-valve, it adopts complicated air sac type principle and cam mechanism to form, the blast regulator of deciding of this air sac type principle has following shortcoming: mechanism's complexity, cost an arm and a leg, bore and processing air quantity be less than normal, the long-term control accuracy of using of the repeatability of air bag active force and conformity difference and influence, and easily because of tired out of control, working life is short for this air bag; When adopting center line single valve plate (being so-called flow-limiting plate) to carry out the air quantity adjusting, asymmetric valve plate easily forms the valve backwash, and is subject to the influence of piping erection length; Flow through air-flow behind the valve plate because of inhomogeneous air distribution effect and the air quantity control accuracy that directly has influence on actual use.

Unbalanced fluid pipe network wind system also causes the vibration of system's control easily, has wasted energy consumption, has improved noise.

At present knownly also do not realize being specifically applied to low pressure air system, flow from electronic dynamic adjustments air-valve 0%～100% adjustable, that adopt mechanical spring self-powering type principle, have automatic pressure balance function.

Invention Inner holds

The purpose of this utility model is to overcome deficiency of the prior art, and a kind of electronic dynamic adjustments air-valve that has the High Precision Automatic pressure balance function of mechanical self-powering type, can be applicable to low pressure air system is provided.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

The utility model provides a kind of Machine Self-supporting Type High Precity Automatic Air-pressure Balance Power Dynamci Accommodation Air Valve, comprise Electric air valve valve body 5 and lightweight valve plate 12, Electric air valve valve body 5 inside have following symplex structure: both sides respectively have a lightweight valve plate 12 to be installed on the Electric air valve valve body 5 by hinge 9 is installed; Respectively there are at least two fine setting flexural springs 10 to be installed on the Electric air valve valve body 5, and on the another side that is pressed in lightweight valve plate 12 after the initial deformation; Electric air valve valve body 5 middle parts are provided with the water conservancy diversion pin 11 in restriction lightweight valve plate 6 final positions, position spring 13 is installed in the middle of it, fills in and play screw 3; The top, windward side of two lightweight valve plates 12 of symmetry and the two ends of a flexural spring sheet 4 with symplex structure are fixedly linked, the center of flexural spring sheet 4 is opened a circular hole and is hinged on plug and beats on the screw 3, this plug is played the other end contact of screw 3 on the outer of cam 2, when cam 2 is made little stroke and is slowly rotated, adjust the position that plug is played screw 3 by position spring 13 with high elastic coefficient, cam 2 is connected with rotating shaft 1, and rotating shaft 1 can drive cam 2 and rotate.

Described Electric air valve valve body 5 arranged outside have an electric actuator 7 that is connected with rotating shaft 1.

Described electric actuator 7 is angle stroke electric actuator.

Described Electric air valve valve body 5 arranged outside have a flow indication that is connected with rotating shaft 1 to coil 6 quarter.

Described electronic dynamic adjustments air-valve can be that two above Electric air valve valve body 5 parallel connections, a shared rotating shaft 1 and electric actuator 7 are arranged.

Compared with prior art, the beneficial effects of the utility model are:

(1) the electric actuator aperture in the utility model one regularly, the air mass flow by air-valve is mechanical self-powering type automatic constant, also is well-determined, is not subjected to the influence of air system ductwork pressure fluctuation.And in whole pressure range, the opening angle of electric actuator becomes unique mathematics corresponding relation with air mass flow.

(2) the Electric air valve flow of this pressure independent type is from 0%～100% adjustable, control accuracy height, high conformity, long service life.

(3) the non-linear equivalent flexural spring of air mass flow automatic constant device employing highi degree of accuracy stainless steel is the groundwork element, adopt opposite opened bivalve plate symplex structure and symmetrical spring sheet, and join special flow apron, and flow groups weaves, and structure is simpler, easily manufactured.

Description of drawings

Fig. 1 is embodiment's 1 an of the present utility model valve internal structural representation.

Fig. 2 be among Fig. 1 valve A-A to cross-sectional view;

Fig. 3 is a plurality of electronic dynamic adjustments air-valves embodiment who uses in parallel in the utility model.

The reference character of each critical piece is among the figure:

1 rotating shaft, 2 cams, 3 plugs are played screw, 4 flexural spring sheets, 5 Electric air valve valve bodies, 6 flows indication dish at quarter, 7 jiaos of stroke electric actuator, 8 air port flanges, 9 install hinge, 10 fine setting flexural springs, 11 water conservancy diversion pins, 12 lightweight valve plates, 13 position springs, 14 stop screws

Embodiment

With reference to figures 1 through 3, will be described in detail the utility model below.

Specific embodiment 1 provides a kind of electronic dynamic adjustments air-valve with the High Precision Automatic pressure balance function of mechanical self-powering type.Comprise Electric air valve valve body 5, it is characterized in that valve inner has following symplex structure: both sides respectively have a lightweight valve plate 12 to be installed on the Electric air valve valve body 5 by hinge 9 is installed; Respectively there are at least two fine setting flexural springs 10 to be installed on the Electric air valve valve body 5, and on the another side that is pressed in lightweight valve plate 12 after the initial deformation.Electric air valve valve body 5 middle parts are provided with the water conservancy diversion pin 11 in restriction lightweight valve plate 6 final positions, position spring 13 is installed in the middle of it, fills in and play screw 3; The top, windward side of two lightweight valve plates 12 of symmetry and the two ends of a flexural spring sheet 4 with symplex structure are fixedly linked, the center of flexural spring sheet 4 is opened a circular hole and is hinged on plug and beats on the screw 3, this plug is played the other end contact of screw 3 on the outer of cam, when cam 2 little strokes slowly rotate, adjust plug by position spring 13 and beat the position of screw 3, thereby make flexural spring sheet 4 produce different working position and opplied moment with high elastic coefficient.This cam 2 is provided with one can drive the rotating shaft 1 that cam 2 rotates.

The outer surface of described Electric air valve valve body 5 is provided with flow indication and coils 6 quarter, and the scale of this indication dish at quarter, the angle stroke of rotating shaft become mathematics corresponding relation one by one with the equivalent elasticity coefficient of effect spring (containing flexural spring sheet 4, fine setting spring 10); The outside of Electric air valve valve body 5 also is provided with an angle stroke electric actuator 7 that can drive rotating shaft 2, this electric actuator is by accepting standard control signal (as: the angle stroke of 0～10VDC, 2～10VDC) generations, 0～90 degree, thereby corresponding 0%～100% control flow rate.

The technological principle that its technical problem that solves the utility model adopts is:

After the electronic dynamic adjustments air-valve acceptance criteria control signal, angle stroke electric actuator 7 is fixed on certain angle with rotating shaft 1, cam 2 also is fixed on corresponding angle, utilize the plug that closely contacts on cam 2 outers to play screw 3 and spur or promote flexural spring sheet 4 to corresponding position by position spring 13, the equivalent spring of flexural spring sheet 4 and 10 formation of fine setting flexural spring forms moment M1 to lightweight valve plate 12 jointly.When the airflow passes air-valve, lightweight valve plate 12 both sides produce pressure drop Δ P, and pressure drop Δ P makes air-flow give lightweight valve plate 12 rightabout moment M2 to 12 one of the generation of lightweight valve plate and flexural spring sheet 4, fine setting flexural spring 10.When air-flow acted on enhancing to lightweight valve plate 12, pressure drop Δ P also increased thereupon, and M2 also increases.As M2 during greater than M1, lightweight valve plate 6 is to the closing direction action, and flexural spring sheet 4 also increases to M3 for lightweight valve plate 6 moments with the equivalent spring that fine setting flexural spring 10 forms, and reaches the balance of moment at last, make valve plate 12 rest on a new position, at this moment M2=M3.

When air-flow is done the time spent, owing to lightweight valve plate 12 moves to closing direction, the flow area A minimizing of electronic dynamic air-valve strengthens the resistance coefficient ζ of air-valve.If represent the position of lightweight valve plate 12, M with lightweight valve plate 12 and the folded angle θ in side of Electric air valve valve body 5 ₃Be expressed as the function of θ:

M ₃＝M ₃(θ)

M ₂Also can be expressed as the function of θ and Δ P:

M ₂＝M ₂(θ，ΔP)

When equalising torque:

M ₃＝M ₂

Δ P is just about the function of θ like this:

ΔP＝ΔP(θ)

Dimensionless resistance coefficient ζ also can be expressed as the function of θ: ζ=ζ (θ)

Flow area A also can be expressed as the function of θ: A=A (θ)

Suppose air density ρ, simplify the air quantity Q of the control valve of can flowing through by the fluid mechanics equation group:

$Q=A\×\sqrt{\frac{2\mathrm{\Δp}}{\mathrm{\ρ}\·\mathrm{\ζ}}}=A\left(\mathrm{\θ}\right)\×\sqrt{\frac{2\mathrm{\ΔP}\left(\mathrm{\θ}\right)}{\mathrm{\ρ}\·\mathrm{\ζ}\left(\mathrm{\θ}\right)}}==\mathrm{const}$

The utility model is exactly to utilize the nonlinear interaction of this equivalent flexural spring to set up rational mathematical simulation relation, make air quantity Q become at last irrelevant with θ, with the irrelevant constant of incoming flow air pressure P, only the corner (aperture) with cam 2 has relation, and flows through the air quantity Q of Electric air valve and the angle stroke (aperture) of electric actuator is unique corresponding relation of mathematics one by one.

When the aperture of angle stroke final controlling element is zero, flexural spring sheet 4 is to react on lightweight valve plate 12, overcome fine setting flexural spring 10 and given lightweight valve plate 12 opplied moments, only need this moment very little incoming flow air pressure just Electric air valve can be closed, and incoming-flow pressure is big more, the power of closing of lightweight valve plate 12 is just big more, closes tight more.The electronic dynamic adjustments air-valve of a kind of pressure independent type that Here it is, its flow is controlled in 0%～100% can regulate.

At last, it is also to be noted that what more than enumerate only is specific embodiment of the utility model.Obviously, the utility model is not limited to above embodiment, and many distortion can also be arranged, and as Fig. 3 of accompanying drawing, the shared electric actuator of two or three Electric air valves is to improve control accuracy and flexibility.

All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought protection domain of the present utility model.

Claims (6)

1, a kind of Machine Self-supporting Type High Precity Automatic Air-pressure Balance Power Dynamci Accommodation Air Valve, comprise Electric air valve valve body (5) and lightweight valve plate (12), it is characterized in that Electric air valve valve body (5) inside has following symplex structure: both sides respectively have a lightweight valve plate (12) to be installed on the Electric air valve valve body (5) by hinge (9) is installed; Respectively there are at least two fine setting flexural springs (10) to be installed on the Electric air valve valve body (5), and on the another side that is pressed in lightweight valve plate (12) after the initial deformation; Electric air valve valve body (5) middle part is provided with the water conservancy diversion pin (11) in restriction lightweight valve plate (a 6) final position, position spring (13) is installed in the middle of it, fills in and play screw (3); The top, windward side of two lightweight valve plates (12) of symmetry and the two ends of the flexural spring sheet (4) that has symplex structure are fixedly linked, the center of flexural spring sheet (4) is opened a circular hole and is hinged on plug and beats on the screw (3), this plug is played the other end contact of screw (3) on the outer of cam, when cam (2) is made little stroke and is slowly rotated, force to adjust the position that plug is beaten screw (3) by position spring (13) with high elastic coefficient, cam (2) is connected with rotating shaft (1), and rotating shaft (1) can drive cam (2) and rotate.

2, electronic dynamic adjustments air-valve according to claim 1 is characterized in that, described Electric air valve valve body (5) arranged outside has an electric actuator (7) that is connected with rotating shaft (1).

3, electronic dynamic adjustments air-valve according to claim 2 is characterized in that, described electric actuator (7) is an angle stroke electric actuator.

4, electronic dynamic adjustments air-valve according to claim 1 is characterized in that, described Electric air valve valve body (5) arranged outside has a flow indication dish at quarter (6) that is connected with rotating shaft (1).

5, electronic dynamic adjustments air-valve according to claim 1 is characterized in that, can be has two above Electric air valve valve bodies (5) parallel connection, a shared rotating shaft (1) and electric actuator (7).

6, electronic dynamic adjustments air-valve according to claim 1 is characterized in that, described lightweight valve plate (12) is the square-section.

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