Aperture-variable anti-blocking spray head

Abstract

The utility model discloses an anti-blocking spray head with a variable aperture. The anti-blocking spray head mainly comprises a spray pipe, a filter screen and a variable-diameter sheet, high-pressure feed liquid flows in from the inlet of the spray pipe, passes through the filter screen to effectively isolate large-particle impurities, and then is sprayed out from the spray holes of the variable-diameter sheet to form spray. By shifting the gear boss on the reducing piece, the limiting hole of the reducing piece and the limiting hole of the spraying pipe are located on the same axis, then the center of the spraying hole corresponds to the center of an inner flow channel of the spraying pipe, and accurate adjustment of the size of the spraying opening is achieved. According to the anti-blocking spray head with the variable hole diameter, impurities in feed liquid can be effectively isolated, the hole diameter of the spray head can be flexibly adjusted, the spraying requirements under multiple scenes are met, and the utilization rate of equipment is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of spray coating nozzle technology, specifically a variable aperture anti-clogging nozzle. Background Technology

[0002] Spray coating formation primarily achieves its effect through the following process: Liquid is atomized into tiny droplets by a nozzle under pressure or high-speed airflow. These droplets are carried by the airflow or move towards the coating surface by their own propulsion, colliding with and adhering to the surface. The adhered droplets spread under surface tension and gravity, and adjacent droplets merge to form a continuous liquid film. This film then solidifies into a coating through solvent evaporation, cooling, or a chemical reaction. This process is typically influenced by surface energy, roughness, droplet velocity, and size.

[0003] Existing spray coating nozzles suffer from uneven internal structure and pressure distribution, leading to unstable liquid flow and uneven spraying. The nozzle orifices are typically small, making them prone to clogging by impurities or undissolved substances in the coating. Once clogged, the nozzle needs immediate cleaning or replacement, increasing cost and time. Furthermore, conventional nozzles usually have a fixed spray angle or only adjustable within a limited range, making it difficult to fully cover complex shapes, recesses, or protrusions, potentially requiring multiple adjustments to the nozzle position and angle to complete the coating. This invention addresses these problems by providing a solution. Utility Model Content

[0004] The purpose of this invention is to provide a variable orifice anti-clogging nozzle.

[0005] This utility model is achieved through the following technical solution:

[0006] A variable aperture anti-clogging nozzle, characterized in that it comprises a nozzle, a filter screen, and a variable diameter plate; the nozzle inlet is provided with an internal thread for connecting to a liquid conveying pipe; the nozzle middle is provided with a groove for connecting to the filter screen; the nozzle outlet is provided with a rotation limiting groove for connecting to the variable diameter plate; a bolt hole is provided at a certain eccentric distance from the center of the nozzle outlet for connecting to the variable diameter plate; a limiting hole is provided on the outer side of the nozzle outlet for limiting the rotational movement of the variable diameter plate; the center of the variable diameter plate is a bolt hole, coaxial with the bolt hole of the nozzle; a plurality of nozzles with different diameters are provided on a circle with the bolt hole of the variable diameter plate as the center and the eccentric distance of the nozzle bolt hole as the radius; the rear end of the variable diameter plate is a gear boss for connecting to the rotation limiting groove of the nozzle; the front end of the variable diameter plate is provided with a spray cap for preventing interference from external airflow; a plurality of limiting holes are provided around the variable diameter plate, and when they are coaxial with the limiting holes of the nozzle, the center of the nozzle hole corresponds to the center of the inner flow channel of the nozzle.

[0007] The filter screen is connected to the nozzle via a slot, and the filter screen fits tightly against the inner wall of the nozzle.

[0008] The nozzle bolt hole is provided with an internal thread and is coaxial with the variable diameter plate bolt hole, and is connected by bolts.

[0009] The size of the nozzle can be adjusted by moving the gear boss of the variable diameter plate. The limiting hole of the variable diameter plate and the limiting hole of the nozzle are connected by a pin.

[0010] The diameter of the inner flow channel in the nozzle gradually decreases from top to bottom.

[0011] The variable aperture anti-clogging nozzle provided by this utility model has the following advantages: (1) The filter screen installed on the top of the nozzle helps to filter out impurities in the liquid and avoid nozzle clogging; (2) The atomizing aperture size can be adjusted by the variable diameter plate to meet the requirements of different occasions or different objects to be sprayed, realize the application of one nozzle in multiple occasions, and improve the utilization rate of the equipment. Attached Figure Description

[0012] Figure 1 This is the front view of the present invention.

[0013] Figure 2 This is a cross-sectional view of the present invention.

[0014] Figure 3 This is an exploded view of the present invention.

[0015] Figure 4 These are cross-sectional and front views of the nozzle of this utility model.

[0016] Figure 5 These are the front and side views of the variable diameter plate of this utility model.

[0017] In the attached diagram, the following labels are used: 1 is the nozzle, 2 is the filter screen, 3 is the reducing plate, 4 is the pin, 5 is the bolt, 11 is the internal thread of the nozzle, 12 is the nozzle slot, 13 is the internal flow channel of the nozzle, 14 is the nozzle limiting hole, 15 is the nozzle bolt hole, 16 is the nozzle rotation limiting groove, 21 is the filter screen clip, 31 is the reducing plate gear boss, 32 is the reducing plate bolt hole, 33 is the reducing plate spray cap, 34 is the reducing plate spray hole, and 35 is the reducing plate limiting hole. Detailed Implementation

[0018] A variable aperture anti-clogging nozzle includes a nozzle 1, a filter screen 2, and a reducing plate 3. The nozzle 1 has an internal thread 11 at its inlet for connecting to a liquid delivery pipe. A groove 12 in the middle of the nozzle 1 connects to a clip 21 on the filter screen 2. A rotation limiting groove 16 at the nozzle 1 outlet connects to the reducing plate 3. A bolt hole 15 is located at a certain eccentric distance from the center of the nozzle 1 outlet for connecting the reducing plate 3. A limiting hole 14 is located on the outer side of the nozzle 1 outlet to restrict the rotational movement of the reducing plate 3. A bolt hole 32 is located at the center of the reducing plate 3 for bolting the nozzle. Hole 15 is coaxial and connected by bolt 5; a number of nozzle holes 34 with different diameters are provided on a circle with the variable diameter plate bolt hole 32 as the center and the eccentric distance of the nozzle bolt hole 15 as the radius, and are connected to the nozzle limiting hole 14 by pin 4; the rear end of the variable diameter plate 3 is a gear boss 31, which is used to connect with the nozzle rotation limiting groove 16; the front end of the variable diameter plate 3 is provided with a spray cap 33, which is used to prevent external airflow interference; a number of limiting holes 35 are provided around the variable diameter plate 3, and when they are coaxial with the nozzle limiting hole 14, the center of the nozzle hole 34 corresponds to the center of the inner flow channel 13 of the nozzle.

[0019] First, the external high-pressure liquid pipeline is connected to the internal thread 11 at the inlet of the nozzle 1. Then, the high-pressure liquid is filtered through the filter screen 2 to remove larger impurities and enters the reducer 3 through the inner flow channel 13 of the nozzle. Since the diameter of the inner flow channel 13 decreases, the liquid flow velocity is further increased, and swirling eddies are effectively avoided. To meet the spray angle and droplet size requirements under specific conditions, the gear boss 31 on the reducer 3 is moved to align the required reducer nozzle orifice 34 with the center of the inner flow channel 13 of the nozzle. At this time, the nozzle limiting hole 14 and the reducer limiting hole 35 are coaxial and connected by a pin 4 to prevent the reducer 3 from rotating, thereby changing the orifice size. Since the diameter of the reducer nozzle orifice 34 is always smaller than the outlet diameter of the inner flow channel 13 of the nozzle, the liquid is further dispersed into small droplets, thus forming a mist spray.

[0020] The above content is only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed in this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A variable orifice anti-clogging nozzle, characterized in that, The system includes a nozzle, a filter screen, and a reducing plate. The nozzle inlet has an internal thread for connecting to a liquid delivery pipe. A groove in the middle of the nozzle connects to the filter screen. A rotation limiting groove at the nozzle outlet connects to the reducing plate. A bolt hole at a certain eccentric distance from the center of the nozzle outlet connects to the reducing plate. A limiting hole on the outer side of the nozzle outlet restricts the rotation of the reducing plate. A bolt hole at the center of the reducing plate is coaxial with the bolt hole in the nozzle. Several nozzles of varying diameters are arranged on a circle with the bolt hole in the reducing plate as the center and the eccentric distance from the bolt hole in the nozzle as the radius. A gear boss at the rear end of the reducing plate connects to the rotation limiting groove in the nozzle. A spray cap at the front end of the reducing plate prevents interference from external airflow. Several limiting holes are arranged around the reducing plate; when these holes are coaxial with the limiting holes in the nozzle, the center of each nozzle corresponds to the center of the inner flow channel of the nozzle.

2. The variable aperture anti-clogging nozzle according to claim 1, characterized in that, The filter screen is connected to the nozzle via a slot, and the filter screen fits tightly against the inner wall of the nozzle.

3. The variable aperture anti-clogging nozzle according to claim 1, characterized in that, The nozzle bolt hole is threaded and coaxial with the bolt hole of the variable diameter plate, and is connected by bolts.

4. The variable orifice anti-clogging nozzle according to claim 1, characterized in that, The size of the nozzle can be adjusted by moving the gear boss of the variable diameter plate. The limiting hole of the variable diameter plate and the limiting hole of the nozzle are connected by a pin.

5. The variable orifice anti-clogging nozzle according to claim 1, characterized in that, The diameter of the inner flow channel in the nozzle gradually decreases from top to bottom.

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