CN108212567A - A kind of multistage expansion cavity nozzle - Google Patents

Abstract

The invention relates to a cleaning device. The purpose is to propose a multi-stage expansion cavity nozzle, which can spray high-frequency turbulent flow, avoid the formation of mucous film on the photovoltaic panel due to the impact of airflow, and has the characteristics of high efficiency and thorough dust removal. The technical solution is: a multi-stage expansion cavity nozzle, including a front casing, a rear casing and a "door" type gasket between the front and rear casings; the front casing, the rear casing and the gasket pass through The connectors are fixedly connected; the front housing is provided with a rectangular groove on the side facing the gasket to form a rectangular air storage cavity for buffering the air flow, and an air inlet hole is formed above the rectangular groove to penetrate the wall of the front housing to input high-pressure gas; A number of right-angled triangular slots are formed on the front housing below the rectangular slots, so that trapezoidal columns arranged horizontally, parallel to each other and separated by a certain distance are formed between two right-angled triangular slots and between the right-angled triangular slots and the rectangular slots; The rear shell is symmetrically provided with trapezoidal columns with the same number and corresponding positions as the front shell.

Description

A multi-stage expansion cavity nozzle

technical field

The invention relates to a cleaning device, in particular to a multi-stage expansion cavity nozzle.

Background technique

Solar energy is a clean energy that is developed all over the world. The photovoltaic power generation industry is developing at an astonishing speed. However, photovoltaic panels are easy to accumulate dust during outdoor use, which will seriously affect the absorption and conversion efficiency of photovoltaic panels to sunlight. Therefore, photovoltaic panels must be inspected. Clean regularly. The commonly used cleaning method for photovoltaic panels is mechanical touch cleaning, that is, cleaning with cleaning devices such as rags. This method has the disadvantages of low cleaning efficiency and easy damage to the surface; non-contact gas cleaning methods are mostly fixed-frequency airflow impacts, It is easy to form a layer of mucous film on the surface of photovoltaic panels, and there is a problem of incomplete dust removal; in addition, efficient nanometer self-cleaning film materials can also be used to cover the surface of photovoltaic panels, but the cost is too high to be suitable for mass production; and electric curtain dust removal technology in Domestic research is less, and it has not been widely used.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings in the above-mentioned background technology, and propose a multi-stage expansion cavity nozzle, which can spray high-frequency turbulent pulses, avoid the formation of mucous membranes on photovoltaic panels due to the impact of airflow, and has the characteristics of high efficiency and thorough dust removal.

The invention provides the following technical solutions:

A multi-stage expansion cavity spray head, including a front casing, a rear casing, and a "door"-shaped gasket between the front and rear casings; the front casing, the rear casing, and the gasket are fixedly connected by a connecting piece ;

The side of the front housing facing the gasket is provided with a rectangular groove to form a rectangular air storage cavity for buffering the air flow, and an air inlet hole penetrating the wall of the front housing is formed above the rectangular groove to input high-pressure gas; the front below the rectangular groove A number of right-angled triangular slots are made on the shell, so that trapezoidal columns arranged horizontally, parallel to each other and separated by a certain distance are formed between two right-angled triangular slots and between right-angled triangular slots and rectangular slots. A top surface is facing the rear shell; the rear shell is symmetrically provided with trapezoidal columns with the same number and corresponding positions as the front shell; Funnel-shaped dilated lumen.

There is a certain distance between the corresponding trapezoidal pillars on the front shell and the rear shell, so as to form an airflow passage connecting between the funnel-shaped expansion chambers and between the air storage chamber and the funnel-shaped expansion chamber.

The opening side of the gasket is arranged downwards as an air outlet for outputting turbulent air flow; the air outlet communicates with the expansion cavity through an air flow channel.

The beneficial effects of the present invention are: in the present invention, the "door" type gasket is used to provide airflow channels and gas outlets for the gas flow inside the nozzle, and at the same time, the structure surrounded by three sides of the gasket can ensure that the gas only flows out along the direction of the gasket opening; high pressure The gas enters the gas storage chamber from the air inlet, and then passes through the multi-stage connected funnel-shaped expansion chamber to generate high-frequency turbulent flow, and the high-frequency impact gas is discharged from the gas outlet, which solves the problem of dust and photovoltaic panels forming mucous membranes under the impact of fixed-frequency airflow problems, high cleaning efficiency and thorough dust removal; in addition, the present invention has a simple structure and is easy to popularize and apply.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the present invention.

Fig. 2 is a schematic perspective view of the front casing of the present invention.

Fig. 3 is a schematic perspective view of the rear casing of the present invention.

Fig. 4 is a schematic perspective view of the three-dimensional structure of the gasket of the present invention.

Fig. 5 is a schematic cross-sectional structure diagram of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following examples.

As shown in the figure, a multi-stage expansion cavity spray head includes a front casing 1, a rear casing 2 and a gasket 3 between the front casing and the rear casing, and the front casing, the rear casing and the gasket pass through The connecting piece 4 (usually a screw) is fixedly connected. The gasket is in the shape of a "door" surrounded by three sides, and the length and width are suitable for the front and rear shells. After the gasket is installed, a certain gap is formed between the front and rear shells as the airflow channel 31, and the opening side of the gasket is used as the airflow channel. Air outlet 32. A rectangular groove is formed on the side of the front housing facing the gasket. After the front housing and the rear housing are fixed, the rectangular groove forms an air storage chamber 12 (the position of the rear housing corresponding to the rectangular groove of the front housing in the figure is a plane, also It can be set as a groove structure according to the actual situation) for buffering high-pressure airflow; the center of the front housing wall above the air storage chamber is provided with an air inlet 11 that runs through the front housing wall, and the air inlet and the external high-pressure airflow pipeline connected to deliver the high-pressure airflow to the air storage chamber; the front housing below the air storage chamber is provided with several (three shown in the figure) horizontally arranged, parallel right-angled triangular slots 13, so that between two right-angled triangular slots between the right-angled triangular groove and the rectangular groove to form trapezoidal columns 16 (visible in the figure: a top surface of each trapezoidal column is facing the rear case). The corresponding position on the rear shell is also symmetrically provided with the same number of trapezoidal columns as the front shell; the right-angled triangular grooves corresponding to the positions on the front and rear shells are combined to form a plurality of funnel-shaped expansion chambers; There is a certain distance between the trapezoidal columns on the casing (the distance is determined according to the needs), thereby forming an air flow channel 31 connecting two adjacent funnel-shaped expansion chambers, and the rectangular air storage chamber and the adjacent funnel-shaped expansion chambers An airflow channel is also arranged between them to ensure that the airflow can circulate through the airflow channel. The expansion lumens are communicated with each other through airflow channels to form multi-stage expansion lumens.

One end of the multi-stage expansion chamber communicates with the air storage chamber through the airflow channel, and the other end communicates with the air outlet 32, so as to facilitate the output of turbulent airflow. The top of the front housing is provided with a screw hole 15, and the spray head is fixed on the cleaning handle by screws (the cleaning handle is omitted in the figure).

The working principle of the present invention is as follows:

As shown in Figure 5, after the high-pressure airflow enters the air storage chamber through the air inlet, it flows into the multi-stage continuous expansion chamber through the airflow channel to generate high-frequency turbulent airflow, and finally the high-frequency turbulent airflow is discharged through the air outlet and hits the surface of the photovoltaic panel. Finish cleaning. In addition, the cleaning area can also be increased by increasing the length of the nozzle according to the needs, which is suitable for different occasions.

Finally, it should be noted that what is listed above are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many modifications are possible. All deformations that can be directly derived or associated by those skilled in the art from the content disclosed in the present invention should be considered as the protection scope of the present invention.

Claims (3)

1. a kind of multistage expansion cavity nozzle, including procapsid (1), back casing (2) and the "door" type between forward and backward housing Gasket (3)；The procapsid, back casing and gasket are fixedly connected by connector；

The procapsid offers rectangular channel (12) towards gasket to form the rectangle air storing cavity of caching air-flow on one side, rectangular channel Top, which is opened, is formed with the air admission hole (11) through procapsid wall portion to input high pressure gas；Being made on procapsid below rectangular channel has Several right angled triangle slots (13), so as between right angled triangle slot two-by-two and between right angled triangle slot and rectangular channel Formed it is horizontally disposed, be mutually parallel and trapezoidal column spaced apart two-by-two (16), a top surface face of each trapezoidal column Back casing；The corresponding trapezoidal column in and position identical with procapsid quantity is symmetrically arranged on the back casing；The procapsid, The corresponding right angled triangle slot in position combines to form funnel-form expansion cavity on back casing.

2. multistage expansion cavity nozzle according to claim 1, it is characterised in that：Position pair on the procapsid, back casing There is certain spacing, so as to be formed between connection funnel-form expansion cavity and air storing cavity and funnel-form expand between the trapezoidal column answered Open the gas channel (31) between chamber.

3. multistage expansion cavity nozzle according to claim 2, it is characterised in that：Gasket opening side arrange downward with Gas outlet (32) as output turbulent air flow；It is connected between the gas outlet and expansion cavity by gas channel.