CN2779295Y - Mechanical self-operated air flow automatic controlling valve - Google Patents

Abstract

The utility model discloses a valve, which is aimed to provide a mechanical self-operated air flow automatic controlling valve used for an air supply system of an air conditioner. An automatic control valve of the utility model comprises a valve body 1 of the control valve, wherein the interior of the valve body has a symmetrical structure that both sides of the interior of the valve body are respectively provided with a light valve plate 6 which is arranged on the valve body 1 of the control valve through an installing hinge 4; both sides of the interior of the valve body are respectively provided with a flexural spring 2 which is arranged on the valve body 1 of the control valve and is pressed on one surface of the light valve plate 6 after being initially deformed; both sides of the interior of the valve body are respectively provided with a regulating mechanism 5 which is fixed on the valve body 1 of the control valve to hold the other surface of the light valve plate 6, and the initial position of the light valve plate 6 can be changed; the middle part of the valve body 1 of the control valve is provided with a blocking rod 7 which limits the end position of the light valve plate 6. The control valve uses a high-precision stainless steel flexural spring as a main working element, and thus, the life time is longer than an air bag. The utility model also uses open type double valve plates, and is matched with a special diversion leaf. Thus, the airflow organizing effect is good, the controlling precision is high and a result is simple.

Description

Machinery self-operated type air mass flow autocontrol valve

Technical field

The utility model relates to a kind of valve.More particularly, the utility model relates to a kind of mechanical self-operated type air mass flow autocontrol valve that is used for the air-conditioning supply air system.

Background technology

In a large amount of air systems, all relate to the application of automatic flow control valve, also require constant or the like as the air quantity of deciding air quantity air current composition, ventilating system inlet scoop or air outlet of a large amount of technological requirements on the air-supply of the constant current amount of air-conditioning system, the industrial production line.And the fluid pipe network no matter wind system, water system all need to carry out the balance of node resistance, mechanical self-operated type air mass flow autocontrol valve is a kind of best means that solves balance.

Generally adopt gas flow sensor, intelligent controller and control valve to form the complicated and expensive control system of a cover for the automatic control control of air mass flow at present, there has been mechanical type to decide air quantity valve (or claiming to decide blast regulator or claim mechanical self-operated type volume control damper) abroad, it adopts complicated gasbag-type principle and cam mechanism to form, this gasbag-type is decided blast regulator following defective: mechanism's complexity, cost an arm and a leg, and easily because of tired out of control, service life is short for air bag; Adopt the center line valve plate to regulate, control accuracy is low, easy vortex behind the valve plate, and be subjected to the influence of pipeline installation length; Flow through air-flow behind the valve plate because of actual air current composition effect and the flow control accuracy of using of inhomogeneous directly influence.

Summary of the invention

Main purpose of the present utility model is to overcome deficiency of the prior art, and a kind of mechanical self-operated type air mass flow autocontrol valve that is used for the air-conditioning supply 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 mechanical self-operated type air mass flow autocontrol valve, comprises control valve valve body 1, it is characterized in that valve inner has following symmetrical structure: both sides respectively have a lightweight valve plate 6 to be installed on the control valve valve body 1 by hinge 4 is installed; Respectively there is a flexural spring 2 to be installed on the control valve valve body 1, and is being pressed in after the initial deformation on lightweight valve plate 6 one sides; Respectively there is a guiding mechanism 5 that is fixed on the control valve valve body 1 to withstand the another side of lightweight valve plate 6, can changes the initial position of lightweight valve plate 6; Control valve valve body 1 middle part is provided with the pin 7 in restriction lightweight valve plate 6 final positions.

The exit of the valve body of control valve described in the utility model 1 also is provided with the deflector 3 of some adjustment air flow states.

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

It is the groundwork element that mechanical self-operated type air mass flow autocontrol valve in the utility model adopts high accuracy stainless steel flexural spring, and the life-span is longer than air bag; And adopt opposite opened bivalve plate, and join special water conservancy diversion leaf, air current composition is effective, the control accuracy height, and the result is also simpler.

Description of drawings

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

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

Fig. 3 is the left view of valve among Fig. 1.

The Reference numeral of each parts is among the figure:

1 control valve valve body, 2 flexural springs, 3 deflectors, 4 install hinge, 5 guiding mechanisms, 6 lightweight valve plates, 7 pins.

The specific embodiment

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

Specific embodiment 1 provides a kind of mechanical self-operated type air mass flow autocontrol valve, comprises control valve valve body 1, it is characterized in that valve inner has following symmetrical structure: both sides respectively have a lightweight valve plate 6 to be installed on the control valve valve body 1 by hinge 4 is installed; Respectively there is a flexural spring 2 to be installed on the control valve valve body 1, and is being pressed in after the initial deformation on lightweight valve plate 6 one sides; Respectively there is a guiding mechanism 5 that is fixed on the control valve valve body 1 to withstand the another side of lightweight valve plate 6, can changes the initial position of lightweight valve plate 6; Control valve valve body 1 middle part is provided with the pin 7 in restriction lightweight valve plate 6 final positions; The exit of control valve 1 also is provided with the deflector 3 of some adjustment air flow states.

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

Flexural spring 2 is given 6 one precompressed moment of lightweight valve plate M ₁, make lightweight valve plate 6 rest on initial position by guiding mechanism 5, this initial position can utilize guiding mechanism 5 to preestablish adjustment.When the airflow passes control valve, lightweight valve plate 6 both sides produce pressure drop Δ P, and pressure drop Δ P makes air-flow give lightweight valve plate 6 rightabout moment M to 6 one of generation of lightweight valve plate and flexural spring 2 ₂When air-flow acted on enhancing to lightweight valve plate 6, pressure drop Δ P also increased thereupon, M ₂Also increase.Work as M ₂Greater than M ₁The time, lightweight valve plate 6 is to the closing direction action, and flexural spring 2 also increases to M for lightweight valve plate 6 moments ₃, reach the balance of moment at last, make valve plate rest on a new position, this moment M ₂=M ₃Because lightweight valve plate 6 is to the closing direction action, the flow area A of control valve reduces, and the resistance coefficient ζ of control valve is strengthened.

If represent the position of lightweight valve plate 6, M with lightweight valve plate 6 and the folded angle θ in side of control valve valve body 1 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 atmospheric density p, by can the flow through air quantity Q of control valve of fluid mechanics equation:

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

The utility model utilizes the Nonlinear Bending spring to set up rational relation exactly, makes air quantity Q become the irrelevant constant with θ at last.

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.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 (2)

1, a kind of mechanical self-operated type air mass flow autocontrol valve comprises control valve valve body (1), it is characterized in that valve inner has following symmetrical structure: both sides respectively have a lightweight valve plate (6) to be installed on the control valve valve body (1) by hinge (4) is installed; Respectively there is a flexural spring (2) to be installed on the control valve valve body (1), and is being pressed on after the initial deformation on lightweight valve plate (6) one side; Respectively there is a guiding mechanism (5) that is fixed on the control valve valve body (1) to withstand the another side of lightweight valve plate (6), can changes the initial position of lightweight valve plate (6); Control valve valve body (1) middle part is provided with the pin (7) in restriction lightweight valve plate (a 6) final position.

2, mechanical self-operated type air mass flow autocontrol valve according to claim 1 is characterized in that, the exit of described control valve valve body (1) also is provided with the deflector (3) of some adjustment air flow states.

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