CN2602836Y

CN2602836Y - Air flow controller for electrostatic plating equipment

Info

Publication number: CN2602836Y
Application number: CN 02248102
Authority: CN
Inventors: 高敏坚
Original assignee: Yudong Zhongshan Machinery Engineering Co ltd
Current assignee: Yudong Zhongshan Machinery Engineering Co ltd
Priority date: 2002-09-12
Filing date: 2002-09-12
Publication date: 2004-02-11
Anticipated expiration: 2012-09-12

Abstract

The utility model relates to an air current controlling device for the static spraying device. The utility model comprises a blower motor(1), a transducer(2) and a sensor(3); the output end of the transducer(2) provides electric power for the blower motor; the sensor(3) in positioned on the whirly entrance of the device; the output end of the sensor(3) is connected with the input end of the transducer(2); the utility model can enhance the precision, control the wind speed and realize the arbitrary and continuous controllability of the wind speed; the utility model can enhance the spraying quality, has a high workpiece powder rolling ratio and improves the powder rolling effect; the utility model has a high powder recycling efficiency and can realize the energy saving effect.

Description

The air flow controller of electrostatic spraying device

1, technical field:

The utility model relates to a kind of air flow controller of electrostatic spraying device.

2, background technology:

In paint industry, the continuous upgrading of equipment has driven the develop rapidly of industry; The extensive use of various new technologies has promoted the update of application techniques again.But for a long time, because the restriction of the Several Factors of influence spray dress industry development key, the process that improves coating quality is delayed widely.Even there is people general's analogy to be " the bottle strength of paint industry " problem.We can say that these several problems do not solve, the raising of coating quality will be difficult.

In the existing technology of whole industry, the negative pressure exhausting system in spray room all adopts power frequency supply directly to drive the scheme of air exhauster, comes controlled wind speed with the method that changes the suction opeing size; Its structure as shown in Figure 1, the exhausting system of electrostatic power spraying apparatus comprises air lock A, exhausting motor B, filter C and the whirly D that is installed in the filter; The advantage of this scheme is: control mode is simple; Equipment investment is less.Just because of this, its shortcoming is conspicuous: the one coating quality is carried not high, now, in paint industry, the control of wind speed adopts the way of switch air lock A to come controlled wind speed, but this way is very not easy to operate, and air lock A closes a little bit smaller, control to wind speed is inoperative substantially, has closed many and bad control; Just because of the uncontrollability of wind speed, cause the instability of air-flow, cause spraying the instability of environment, also must cause the inhomogeneous of coating, influence the Workpiece painting quality.Its two restrictions workpiece powder utilization, at paint industry, the various powder that are used to spray workpiece are very expensive, and the powder utilization of powder and wind speed have confidential relation, and uncontrollable owing to wind speed, directly cause the powder utilization of powder to be restricted.The rate of recovery is low in addition, because the powder in the paint industry is recycled, the uncontrollable organic efficiency of powder that just must cause of wind speed is low, and this brings economic benefit loss to the user, this point also just the user seek assiduously and suffer from not having one of three big knotty problems of good plan for a long time.The huge waste that also has the energy because wind speed and frequency is uncontrollable, causes the huge waste of the energy, has a strong impact on the economic benefit of paint industry.

3, summary of the invention:

The purpose of this utility model provides a kind of air flow controller of electrostatic power spraying apparatus, it utilizes the principle of converter technique and closed-loop control speed governing, make the rotating speed of blower motor change and change along with pressure reduction, make electrostatic power spraying apparatus obtain stable air-flow, improve coating quality and effect.

The utility model is achieved by the following technical solution: it comprises blower motor, frequency converter and control device and sensor, the output of DC speed regulation control device provides power supply for blower motor, sensor is installed in the whirly of equipment and imports and exports, and the output of sensor is connected with the input of DC speed regulation control device.

Above-mentioned described sensor is a kind of differential pressure indicator.

Above-mentioned described blower motor is a direct current generator.

The utility model compared with prior art has following advantage: the in good time controlled wind speed of its energy high accuracy, realized any continuous controllable of wind speed, improve coating quality, the powder utilization of workpiece is increased significantly, also powder effect on first mate's the edge that improves some workpiece; And follow the tracks of the pressure reduction of whirly air inlet and air outlet with sensor, and carry out adjusted in concert, improve the organic efficiency of powder, it avoids producing because of wind speed is too high or too low too much not recyclable powder, utilize high-precision direct-flow controlling device to make it can not cause the ease powder, realize energy-saving effect because of wind speed is too low; The rotating speed of blower motor changes with change of wind velocity, is not constant, has so saved electric energy greatly, makes the equipment energy savings reach as high as 30% behind use the utility model.

4, description of drawings:

Below in conjunction with accompanying drawing the utility model is done detailed explanation:

Fig. 1 is a conventional electrostatic powder spray coating device principle schematic;

Fig. 2 is the air flow controller principle schematic of the utility model electrostatic power spraying apparatus;

Fig. 3 is control principle figure of the present utility model;

Fig. 4 is the circuit diagram of Fig. 3 correspondence.

5, the specific embodiment:

As Fig. 2, Fig. 3, shown in Figure 4, the utility model comprises blower motor (1), DC speed regulation control device (2) and sensor (3), the output of DC speed regulation control device (2) is that blower motor (1) provides power supply, air velocity transducer (3) is installed on the air intake passage and air-out passage of equipment, and the output of sensor (3) is connected with the input of DC speed regulation control device (2).Sensor (3) is a kind of differential pressure indicator.As shown in Figure 2, the utility model electrostatic power spraying apparatus comprises that filter (4), sensor (3), whirly are imported and exported sampled point (5), whirly is imported and exported sampled point (6), whirly device (7), one-level recovery powder bucket (8) and blower motor (1).The utility model utilizes the PID function of DC speed regulation control device (2) to realize the control of air-flow closed-loop stabilization.

Claims

1, the air flow controller of electrostatic spraying device, it is characterized in that it comprises blower motor (1), frequency converter (2) and sensor (3), the output of frequency converter (2) is that blower motor (1) provides power supply, sensor (3) is installed in the whirly of equipment and imports and exports, and the output of sensor (3) is connected with the input of frequency converter (2).

2,, it is characterized in that sensor (3) is a kind of differential pressure indicator according to the air flow controller of the described electrostatic spraying device of claim 1.