Nozzle type aluminum alloy variable air volume valve

Abstract

The utility model discloses a nozzle type aluminum alloy variable air volume valve, which particularly relates to the technical field of air valves and comprises two valve plates, two ends of the two valve plates are jointly connected with an air guide component, two blades are mounted between the two valve plates, and a linkage component is connected between the two blades. The two valve plates and the two air guide assemblies jointly form a nozzle structure, a plurality of first air inlets are formed in the inner sides of the ends of the air guide assemblies and jointly connected with a first air inlet cavity, a first air pipe is installed on the outer side of the first air inlet cavity, and a plurality of second air inlets are formed in the inner sides of the middles of the air guide assemblies. The multiple second air inlets are jointly connected with a second air inlet cavity, and a second air pipe is installed on the outer side of the second air inlet cavity. The nozzle type structure designed on the basis of the Venturi effect solves the problems of low precision and easiness in dust accumulation and blockage during differential pressure measurement, and has the advantages of high measurement precision, strong dust accumulation and blockage resistance, accurate air volume regulation and control, high processing efficiency and good product quality.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of air valve, more specifically, the utility model relates to a nozzle type aluminum alloy variable air volume valve. BACKGROUND

[0002] In the ventilation system, the variable air volume valve is the key equipment to realize accurate air volume regulation, and its performance directly affects the ventilation effect and energy utilization efficiency. The traditional square variable air volume valve widely adopts the pitot tube structure to measure the pressure difference, calculates the air volume and carries out the regulation and control. The pitot tube obtains the pressure difference by measuring the total pressure and static pressure of the fluid, and then calculates the air volume.

[0003] But in the actual application scene, the pitot tube structure exposes many drawbacks. On the one hand, the pitot tube pressure sampling port is easy to be blocked by dust. The dust, impurities and the like in the ventilation pipeline are easy to accumulate at the pitot tube pressure sampling port under the action of airflow. With the passage of time, the pressure sampling port is gradually blocked, which causes the measured pressure data to be distorted, eventually causes the air volume calculation to deviate, and the air volume cannot be accurately controlled. This will seriously affect the stability of the indoor environment and the reliability of the production process in places with strict ventilation accuracy requirements, such as hospital operating rooms and electronic chip production workshops. On the other hand, the measurement accuracy of the pitot tube is limited. Due to its measurement principle and structural characteristics, in a complex airflow environment, such as when the airflow exists turbulence and vortex, the pitot tube is difficult to accurately measure the pressure, thereby affecting the accuracy of the air volume measurement, making the variable air volume valve not accurate enough in regulating the air volume, causing energy waste and poor ventilation effect and other problems.

[0004] Therefore, a nozzle type aluminum alloy variable air volume valve is proposed. UTILITY MODEL CONTENTS

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a nozzle type aluminum alloy variable air volume valve to solve the problems raised in the above background.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a nozzle type aluminum alloy variable air volume valve, comprising a valve plate, the valve plate is provided with two, two valve plates are both connected with a wind guide assembly at both ends, two blades are installed between the two valve plates, a linkage assembly is connected between the two blades, the two valve plates and the two wind guide assemblies jointly constitute a nozzle structure, a plurality of first air inlets are formed in the inner side of the end part of the wind guide assembly, a first air inlet cavity is connected with the plurality of first air inlets, a first air pipe is installed outside the first air inlet cavity, a plurality of second air inlets are formed in the inner side of the middle part of the wind guide assembly, a second air inlet cavity is connected with the plurality of second air inlets, a second air pipe is installed outside the second air inlet cavity, and the first air pipe and the second air pipe are both connected with an air pressure sensor.

[0007] Preferably, the air guide assembly comprises an outer baffle, an inner baffle and a support frame, the inner baffle is arranged inside the outer baffle, and the support frame is arranged between the outer baffle and the inner baffle.

[0008] Preferably, the two blades are provided, one blade is connected with the driving shaft, and the other blade is connected with the second support shaft.

[0009] Preferably, the linkage assembly comprises a connecting rod, a transmission frame and a first support shaft, the transmission frame is rotatably connected to the two ends of the connecting rod, each transmission frame is connected with a first support shaft, and each first support shaft is connected with a corresponding blade.

[0010] Preferably, the valve plate and the air guide assembly are made of aluminum stretch profiles.

[0011] The technical effects and advantages of the utility model are as follows:

[0012] 1. By utilizing the nozzle structure composed of the valve plate and the air guide assembly, and combining with the Venturi effect, when the fluid flows through the converging nozzle, the pressure difference can be more stably and accurately measured, at the same time, the inner baffle can guide and gather the airflow, optimize the airflow state, reduce the measurement error, compared with the traditional pitot tube structure, the precision of air volume measurement and control is significantly improved, and the demand of places with high ventilation precision requirements can be better met.

[0013] 2. The inner baffle inside the air guide assembly forms the Venturi effect when the wind passes through, the airflow is smoother and the wind speed is increased, and the high-speed airflow can effectively reduce the possibility of dust and other impurities accumulating at the pressure measuring position, even if there is a small amount of dust, it can also pass through smoothly under the driving of the high-speed airflow, greatly reducing the probability of measurement failure caused by dust accumulation, ensuring the stability and reliability of measurement, prolonging the maintenance period of the equipment, and reducing the maintenance cost.

[0014] 3. By connecting the two blades with the linkage assembly, when the driving shaft drives one blade to rotate, the other blade will rotate synchronously under the synergistic action of the connecting rod, the transmission frame and the first support shaft, so as to facilitate accurate regulation of the opening size and realize accurate adjustment of the air flow, improve the regulation precision, and flexibly adjust the ventilation volume according to the actual demand, effectively improve the operation efficiency of the ventilation system.

[0015] 4. The valve plate and the air guide assembly are made of aluminum stretch profiles, the processing technology of the aluminum stretch profiles has the characteristics of high efficiency, can simplify the production process and improve the processing efficiency, at the same time, the material quality of the profiles is uniform and reliable, which helps to improve the overall quality of the products, enhance the durability and stability of the products, and prolong the service life of the variable air volume valve. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1It is the whole structure schematic view of the utility model.

[0017] Figure 2 It is the side view three-dimensional structure schematic view of the utility model.

[0018] Figure 3 It is the blade and linkage assembly connecting structure schematic view of the utility model.

[0019] Figure 4 It is the structure schematic view of the air guide assembly of the utility model.

[0020] The figure mark is: 1, valve plate;2, air guide assembly;201, outer guard plate;202, inner convex plate;203, support frame;3, blade;4, linkage assembly;401, connecting rod;402, transmission frame;403, first support shaft;5, drive shaft;6, second support shaft;7, first air inlet;8, first air cavity;9, second air inlet;10, second air cavity;11, first air pipe;12, second air pipe. Specific implementation

[0021] The technical scheme in the embodiments of the utility model will be clearly and completely described below with the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0022] As shown in the drawings Figures 1-4 A nozzle type aluminum alloy variable air volume valve, including valve plate 1, the valve plate 1 is provided with two, two valve plates 1 both ends are jointly connected with an air guide assembly 2, two valve plates 1 are installed with two blades 3, two blades 3 are connected with linkage assembly 4, two valve plates 1 and two air guide assemblies 2 jointly form nozzle structure, the inner side of the end of air guide assembly 2 is provided with a plurality of first air inlets 7, a plurality of first air inlets 7 are jointly connected with first air cavity 8, the outer side of first air cavity 8 is installed with first air pipe 11, the inner side of the middle of air guide assembly 2 is provided with a plurality of second air inlets 9, a plurality of second air inlets 9 are jointly connected with second air cavity 10, the outer side of second air cavity 10 is installed with second air pipe 12, first air pipe 11 and second air pipe 12 are all connected with a gas pressure sensor.

[0023] In specific implementation, the two valve plates 1 and the two air guide assemblies 2 jointly form a nozzle structure, when fluid flows through the contracted nozzle, the flow rate increases, and the pressure decreases according to Bernoulli's principle, thereby generating a pressure difference before and after the nozzle, compared with the traditional pitot tube, the structure has obvious advantages in precision and anti-dust blockage, in terms of precision, the air guide structure of the air guide assembly 2 can more stably and accurately measure the pressure difference, reduce measurement error, and improve the precision of air volume measurement and control, in terms of anti-dust blockage, the inside of the air guide assembly 2 is convex, when the air passes through, a Venturi effect is formed, the airflow flows more smoothly, the air speed is increased, and the possibility of dust and other impurities accumulating at the pressure measuring position is reduced, even if a small amount of dust exists, it can also pass through smoothly under the driving of high-speed airflow, the probability of measurement failure caused by dust blockage is reduced, the stability and reliability of measurement are ensured, and the performance of the entire square variable air volume valve is improved, meanwhile, the two blades 3 are connected through the linkage assembly 4, when one blade 3 rotates, the other blade 3 will also rotate under the connection of the linkage assembly 4, thereby facilitating accurate regulation of the opening size, facilitating adjustment of air flow, and improving the regulation precision.

[0024] Specifically, the air nozzle end enters, the initial air enters the first air inlet 7 into the first air inlet cavity 8, so that the air pressure sensor connected with the first air pipe 11 detects the initial air pressure, and as the air enters between the two air guide assemblies 2, the air flow rate is increased through the contraction of the space through which the air flows, and the air enters the second air inlet 9 into the second air inlet cavity 10, so that the air pressure sensor connected with the second air pipe 12 detects the air pressure at this position, thereby detecting the pressure difference through the data difference between the two pressure sensors, and as the directions of the first air inlet 7 and the second air inlet 9 are perpendicular to the air flow direction, the first air inlet 7 and the second air inlet 9 can avoid dust accumulation and blockage, thereby improving the air pressure difference detection precision.

[0025] The air guide assembly 2 comprises an outer guard plate 201, an inner convex plate 202 and a support frame 203, the inner side of the outer guard plate 201 is provided with the inner convex plate 202, and the support frame 203 is arranged between the outer guard plate 201 and the inner convex plate 202.

[0026] In specific implementation, the inner convex plate 202 changes the airflow direction, so that the airflow is gathered and the air flow rate is increased, thereby avoiding dust accumulation, and the stability of the inner convex plate 202 can be improved under the support of the support frame 203, and deformation is avoided.

[0027] The blade 3 is provided with two, one blade 3 is connected with the driving shaft 5, and the other blade 3 is connected with the second support shaft 6.

[0028] The linkage assembly 4 comprises connecting rods 401, transmission frames 402 and first support shafts 403, both ends of each connecting rod 401 are rotatably connected with a transmission frame 402, each transmission frame 402 is connected with a first support shaft 403, and each first support shaft 403 is connected with a corresponding vane 3.

[0029] In specific implementation, the driving device connected with the driving shaft 5 can be an electric actuator, when the driving shaft 5 rotates, one vane 3 can be driven to rotate, so that the connecting rod 401 installed on the transmission frame 402 connected with the vane 3 can be driven to move up and down, so that the other transmission frame 402 can drive the other first support shaft 403 to rotate, so that the two vanes 3 can be synchronously rotated, so as to adjust the ventilation volume.

[0030] The valve plate 1 and the air guide assembly 2 are made of aluminum drawn section, so as to improve the processing efficiency and the product quality.

[0031] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A nozzle-type aluminium alloy variable air volume valve comprising a valve plate (1), characterised in that: Two valve plates (1) are arranged, and one air guide assembly (2) is connected to the two ends of the two valve plates (1); two blades (3) are arranged between the two valve plates (1); a linkage assembly (4) is arranged between the two blades (3); the two valve plates (1) and the two air guide assemblies (2) jointly form a nozzle structure; a plurality of first air inlets (7) are arranged on the inner side of the end of the air guide assembly (2); a first air inlet cavity (8) is arranged and connected to the plurality of first air inlets (7); a first air pipe (11) is arranged on the outer side of the first air inlet cavity (8); a plurality of second air inlets (9) are arranged on the inner side of the middle of the air guide assembly (2); a second air inlet cavity (10) is arranged and connected to the plurality of second air inlets (9); a second air pipe (12) is arranged on the outer side of the second air inlet cavity (10); and one air pressure sensor is arranged and connected to the first air pipe (11) and the second air pipe (12). The air guide assembly (2) comprises an outer guard plate (201), an inner convex plate (202) and a support frame (203); the inner convex plate (202) is arranged on the inner side of the outer guard plate (201); and the support frame (203) is arranged between the outer guard plate (201) and the inner convex plate (202).

2. A nozzle style aluminum alloy variable air volume valve as defined in claim 1, wherein: Two blades (3) are arranged, one blade (3) is connected to a driving shaft (5), and the other blade (3) is connected to a second support shaft (6).

3. A nozzle style aluminum alloy variable air volume valve as defined in claim 2, wherein: The linkage assembly (4) comprises a connecting rod (401), a transmission frame (402) and a first support shaft (403); the transmission frame (402) is rotatably connected to the two ends of the connecting rod (401); one first support shaft (403) is connected to each transmission frame (402); and each first support shaft (403) is connected to the corresponding blade (3).

4. A nozzle style aluminum alloy variable air volume valve as defined in claim 3, wherein: The valve plate (1) and the air guide assembly (2) are made of aluminum stretch profiles.

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