CN205199760U - Shower nozzle of capsule machine spray gun - Google Patents

Abstract

A spray head of a coating machine spray gun, the air cap at the front of the spray head is provided with a primary gasification hole, a secondary gasification hole and a tertiary gasification hole, wherein the primary gasification hole is close to the liquid outlet of the nozzle, The secondary gasification hole and the tertiary gasification hole are located on the periphery of the primary gasification hole in turn and form a certain oblique angle with the nozzle outlet; the primary gasification hole, the secondary gasification hole and the tertiary gasification hole are respectively Connect with the compressed gas port on the spray gun through the pipeline. A nozzle flange is arranged at the front of the nozzle, and the height of the nozzle flange is greater than the length of the valve needle at the front end of the needle valve exposed to the nozzle. By adopting the above-mentioned technical solution, the spray liquid can be dispersed evenly to form an atomization effect with excellent uniformity; the nozzle flange can effectively protect the valve needle and the nozzle at the front end of the needle valve from being artificially damaged. The utility model can well meet the requirements of the film coating process of pharmaceutical factories.

Description

Spray head of coating machine spray gun

technical field

The utility model relates to a nozzle of a spray gun of a coating machine.

Background technique

The spray gun atomization fan-shaped effect of the traditional coating machine is usually achieved by two rows of small round holes on the slope of the spray gun head and two small round holes next to the middle hole, and the middle big round hole is liquid. When the spray gun is working, the compressed air is first introduced to open the needle valve in the middle hole, and the small round hole on the inclined surface of the spray gun head is also opened at the same time, and then the liquid is injected into the spray gun, and the liquid flows in the small round hole next to the middle hole. The atomization starts under the action of the spray gun head, and the fan-shaped surface of the atomization is adjusted by the two rows of small round holes on the inclined surface of the spray gun head. With this structure of the spray gun, the atomized body of the spray can only achieve the gasification effect once, and it will produce a very thick liquid column, which cannot be evenly dispersed, so that the uniformity of the atomized body cannot be optimal, and it cannot be well formed. Meet some special requirements of the film coating process of pharmaceutical factories.

Contents of the invention

The technical problem to be solved by the utility model is: to provide a spray head of a spray gun of a coating machine with a new structure, so as to overcome the above-mentioned defects existing in the spray gun of a coating machine in operation.

The technical scheme adopted by the utility model is: a spray head of a coating machine spray gun, the air cap at the front of the spray head is provided with a first-level gasification hole, a second-level gasification hole and a third-level gasification hole, wherein the first-level The gasification hole is close to the liquid outlet of the nozzle, the secondary gasification hole and the tertiary gasification hole are located on the periphery of the primary gasification hole in turn and form a certain oblique angle with the nozzle liquid outlet. The hole, the secondary gasification hole and the tertiary gasification hole are respectively connected with the compressed gas interface on the spray gun through pipelines. In order to achieve the best atomization effect, the preferred solution of the utility model is to be provided with four secondary gasification holes, and the four secondary gasification holes are equally spaced and circumferentially distributed; two tertiary gasification holes 8, two three The stage vaporization holes are symmetrically distributed on both sides of the liquid outlet of the nozzle.

After the spray gun is used, the spray needle and the nozzle are often damaged by human factors when it is usually in the working state and when it is placed. There is a nozzle flange, and the height of the nozzle flange is greater than the length of the valve needle at the front end of the needle valve exposed to the nozzle. The flange can effectively protect the nozzle and the nozzle on the spray gun.

The high-pressure airflow from the first-stage vaporization hole makes the liquid material port generate negative pressure, and the sucked liquid material undergoes first-stage vaporization to form an atomized body. Since the first-stage gasification flow will have a high linear spray pressure and 360-degree gasification will produce an uneven state, and then pass through the second-stage porous gasification flow to re-gasify the first-stage atomization liquid to achieve uniform atomization. The effect of the secondary gasification inclined hole produces pressure resistance, so that the spraying of the atomizing body can be controlled within a certain atomization range. Then the atomization shape is changed by the third-stage gasification flow, and finally the best fan-shaped atomization state is formed.

The utility model has the beneficial effects: adopting the above-mentioned technical scheme, the spray liquid can be evenly dispersed to form an atomization effect with excellent uniformity; the nozzle flange can effectively protect the valve needle and the nozzle at the front end of the needle valve from being artificially damage. The utility model can well meet the requirements of the film coating process of pharmaceutical factories.

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Fig. 2 is a schematic diagram of distribution of gasification holes in stages 1, 2, and 3 of this embodiment.

Drawing description: 1. Spray gun body, 2. Compressed air interface, 3. Nozzle outlet, 4. Nozzle, 5. Nozzle flange, 6. Needle valve sealing sleeve, 7. Needle valve, 8. Secondary gasification Hole, 9. Primary gasification hole, 10. Tertiary gasification hole, 11. Combined cap, 12. Valve needle, 13. Primary/secondary gasification hole pipeline, 14. Tertiary gasification hole pipeline , 15. Liquid inlet, 16. Needle valve air interface, 17. Air cap.

detailed description

As shown in Fig. 1 and Fig. 2, the spray head of a coating machine spray gun in this embodiment, the air cap 17 at the front of the spray head 4 is provided with a primary gasification hole 9, a secondary gasification hole 8 and a tertiary gasification hole 10, where the primary gasification hole is close to the position of the liquid outlet 3 of the nozzle, the secondary gasification hole 8 and the tertiary gasification hole 10 are located on the periphery of the primary gasification hole in sequence and are in a certain axial direction with the nozzle liquid outlet 3 Oblique angle, the primary gasification hole 9/secondary gasification hole 8 and the tertiary gasification hole 10 respectively pass through the primary/secondary gasification hole pipeline 13 and the tertiary gasification hole pipeline 14 and the spray gun The compressed gas port 2 is connected. The spray head 4 is fixed on the spray gun body 1 by a cap 11 .

In order to achieve the best atomization effect, in this embodiment, four secondary gasification holes 8 are provided, and the four secondary gasification holes are equally spaced on the circumference; two tertiary gasification holes 8, two tertiary The gasification holes 8 are symmetrically distributed on both sides of the liquid outlet of the nozzle.

After the spray gun is used, the spray needle and the nozzle are often damaged by human factors when it is usually in the working state and when it is placed. In order to protect the valve needle at the front end of the needle valve from being easily broken or deformed, a nozzle flange is provided at the front of the nozzle in this embodiment. 5. The height of the flange 5 of the spray head is greater than the length of the needle 12 at the front end of the needle valve exposed to the spray head, which effectively protects the spray needle and the spray head on the spray gun. Moreover, due to the effect of the nozzle flange 5, the external airflow recoil isolation is generated for the third-stage gasification hole 10, so that the side airflow of the third-stage gasification hole 10 is not affected, and the uniformity of the airflow and the hole of the third-stage gasification hole 10 are effectively protected. Mouth clean.

During use, 1. First connect the compressed air port 2 and the needle valve air port 16 to the compressed air plastic pipe, and connect to the air source of the equipment; the liquid inlet 15 is connected to the liquid material pipe. 2. Open the compressed air control valve, the primary gasification hole 9, the secondary gasification hole 8, and the tertiary gasification hole 10 are fed with compressed air at the same time; 3. Open the needle valve 7, and then open the liquid control valve, the liquid enters Inside the sealing sleeve 6, it is sprayed out through the nozzle at the front end of the sealing sleeve; 4. The sprayed liquid is atomized under the action of primary, secondary, and tertiary gasification to achieve a uniform atomization effect. The whole atomization process is controlled by PLC program.

Claims (5)

1. the shower nozzle of a seed-coating machine spray gun, it is characterized in that: the procephalic gas cap of described spray is provided with one-level gasification hole, secondary gasification hole and three grades of gasification holes, the wherein position of the adjacent nozzle liquid outlet in one-level gasification hole, secondary gasification hole and three grades of gasification holes are positioned at that one-level gasification hole is peripheral successively and with nozzle liquid outlet axially in a fixed inclination, described one-level gasification hole, secondary gasification hole are connected with the Compressed Gas interface on spray gun respectively by pipeline with three grades of gasification holes.

2. the shower nozzle of seed-coating machine spray gun according to claim 1, is characterized in that: described gas cap is provided with four secondary gasification holes, four secondary gasification hole circle distribution at equal intervals.

3. the shower nozzle of seed-coating machine spray gun according to claim 1 and 2, is characterized in that: described gas cap is provided with two three grades gasification holes, and two three grades gasification holes are symmetrically distributed in nozzle liquid outlet both sides.

4. the shower nozzle of seed-coating machine spray gun according to claim 1 and 2, is characterized in that: shower nozzle front portion is provided with shower nozzle flange, and the needle that the height of shower nozzle flange is greater than needle-valve front end exposes the length of shower nozzle part.

5. the shower nozzle of seed-coating machine spray gun according to claim 3, is characterized in that: shower nozzle front portion is provided with shower nozzle flange, and the needle that the height of shower nozzle flange is greater than needle-valve front end exposes the length of shower nozzle part.