Adjustable nozzle of air flow pulverizer

Abstract

The utility model provides an adjustable nozzle for a jet mill, comprising: a nozzle seat, a sleeve is sleeved in the nozzle seat, an external thread is arranged on the outer side of the sleeve, an adjustment nut cooperates with the external thread on the outer side of the sleeve, the adjustment nut is axially fixed to the nozzle seat, an air hole is arranged in the sleeve, the air hole passes through the sleeve, and the front end of the sleeve is fixedly connected to the nozzle. The nozzle fixedly connected to the front end of the sleeve can be adjusted along the axis of the fixed seat, and the distance from the nozzle to the intersection of compressed air can be further adjusted to match a reasonable relative position and gas pressure according to the properties of the material, thereby increasing the scope of application and improving the performance of the jet mill.

Description

Technical Field

[0001] The utility model relates to the technical field of airflow pulverization, in particular to an adjustable nozzle of an airflow pulverizer. Background Art

[0002] Airflow pulverizer is an important equipment for ultrafine grinding, which is widely used in ultrafine grinding of non-metallic minerals and chemical raw materials. Its working principle is that the material after being crushed by the airflow pulverizer is transported to the impeller classification area by the rising airflow. Under the action of the centrifugal force of the classification wheel and the suction force of the fan, the coarse powder is separated from the fine powder. The coarse powder returns to the grinding chamber according to its own gravity to continue to be crushed. The qualified fine powder enters the cyclone collector with the airflow, and the fine dust is collected by the bag dust collector. The purified gas is discharged by the induced draft fan. The nozzle of the airflow pulverizer is the main component of the airflow pulverizer. The high-pressure gas passes through the nozzle to accelerate the formation of airflow to accelerate the mutual impact, collision and shearing of the materials to crush them. The axial direction of the nozzle of the traditional airflow pulverizer is not easy to adjust, and the position of the nozzle cannot be flexibly adjusted according to the material. Utility Model Content

[0003] The problem solved by this patent is that the nozzle of the traditional airflow pulverizer cannot be adjusted axially, and the spray angle is not easy to converge. In order to solve the above technical problems, the front-end fixed connection nozzle of the utility model can be adjusted along the axis of the fixed seat, and the distance from the nozzle to the intersection of compressed air can be further adjusted. The reasonable relative position and gas pressure can be matched according to the properties of the material, the scope of application is increased, and the performance of the airflow pulverizer is improved.

[0004] Specifically, the utility model adopts the following technical solutions:

[0005] The utility model provides an adjustable nozzle for an air flow pulverizer, comprising:

[0006] A nozzle base, wherein a sleeve is sleeved inside the nozzle base, an external thread is arranged on the outer side of the sleeve, an adjusting nut cooperates with the external thread on the outer side of the sleeve, the adjusting nut is axially fixed to the nozzle base, an air hole is arranged inside the sleeve, the air hole passes through the sleeve, and the front end of the sleeve is fixedly connected to the nozzle.

[0007] Furthermore, the center line of the air hole and the center line of the nozzle base at least partially do not overlap.

[0008] Furthermore, a scale is set on the sliding sleeve.

[0009] Furthermore, a plurality of annular protrusions are arranged on the outer circumferential surface of the sliding sleeve, the gaps between the annular protrusions form a groove, and a sealing ring is arranged in the groove.

[0010] Furthermore, a guide groove is provided on the sliding sleeve, and the guide groove is provided on the nozzle installation side.

[0011] Furthermore, the nozzle is arranged obliquely relative to the sliding sleeve.

[0012] Furthermore, the adjusting nut is fixed on the nozzle base through a pressing plate.

[0013] Furthermore, a trachea joint is provided on the rear end surface of the sliding sleeve.

[0014] Furthermore, a guide sleeve is provided on the contact surface between the sliding sleeve and the inner wall of the nozzle base.

[0015] Furthermore, a sealing device is provided between the nozzle and the front end surface of the sliding sleeve.

[0016] The positive effects of the utility model are:

[0017] By adjusting the nozzle position, the reasonable relative position and gas pressure can be matched according to the properties of the material, and the distance from the nozzle to the intersection of compressed air can be adjusted to achieve better crushing effect.

[0018] An eccentric structure is provided to prevent the nozzle from deviating from the vertical position.

[0019] The linear adjustment of the spray is driven by the nozzle holder, and the nozzle position is scaled for easy quantitative adjustment.

[0020] The nozzle is made of zirconium oxide, which has the advantages of high wear resistance, adjustable relative position of the nozzle and wide range of crushing fineness. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A cross-sectional view of the structure of a specific embodiment of the utility model;

[0022] Figure 2 A cross-sectional view of the sliding sleeve structure of a specific embodiment of the utility model;

[0023] Figure 3 A schematic diagram of the structure of a sliding sleeve in a specific embodiment of the utility model;

[0024] Figure 4 A schematic diagram of the guide groove structure of a specific embodiment of the utility model.

[0025] In the figure:

[0026] 1- Nozzle base 2- Sleeve 3- Air pipe joint 4- Adjusting nut

[0027] 5-Pressing plate 6-Annular protrusion 7-Guide sleeve 8-Nozzle

[0028] 9-first sealing ring 10-second sealing ring 11-scale

[0029] 12-Diversion groove DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0031] A preferred embodiment of the present invention is described in detail below with reference to the accompanying drawings. Figure 1-Figure 4 As shown, the nozzle base 1 is fixed on the cylinder of the air flow mill, the nozzle base 1 is sleeved with a sleeve 2, the sleeve 2 is provided with an air hole, the rear end of the sleeve 2 is provided with an air pipe joint 3 for connecting the air intake pipe, and the air pipe joint 3 is exemplarily selected as a variable diameter internal and external thread joint. The nozzle 8 is installed obliquely on the front end surface of the sleeve 2, and the nozzle 8 is deflected downward along the axis of the nozzle base 1. Exemplarily, the angle between the center line of the nozzle 8 and the axis of the nozzle base 1 is 20 degrees. The nozzle 8 is connected with the air hole in the sleeve 2. The outer cylindrical surface of the sleeve 2 is provided with a thread, and the adjusting nut 4 is matched with the outer cylindrical surface thread of the sleeve 2. The nozzle base 1 is provided with a groove adapted to the adjusting nut 4, and the adjusting nut 4 is installed in the groove position of the nozzle base 1 through the pressing plate 5. After installation, the adjusting nut 4 is relatively fixed with the nozzle base 1 in the axial direction, and the adjusting nut 4 can rotate along the outer thread of the sleeve 2. When the adjusting nut 4 is rotated, the sleeve 2 moves forward and backward in the axial direction, driving the nozzle 8 installed at the front end of the sleeve 2 to move axially. The sliding sleeve 2 is provided with a scale 11, and the relative distance of each nozzle of each air flow pulverizer is displayed by the scale 11. An air hole is provided in the sliding sleeve 2. In some embodiments, the diameter of the air hole in the sliding sleeve 2 is reduced in stages along the direction of air flow movement. In some embodiments, the center line of the air hole in the sliding sleeve 2 does not coincide with the center line of the nozzle base 1, that is, the sliding sleeve 2 and the nozzle base 1 are eccentrically arranged to prevent the nozzle 8 from deviating from the vertical position. A sealing device is arranged between the nozzle 8 and the front end surface of the sliding sleeve 2. Exemplarily, the sealing device is a first sealing ring 9. Several annular protrusions 6 are arranged on the sliding sleeve 2, and a sealing groove is formed between the annular protrusions 6. A second sealing ring 10 is arranged in the sealing groove, and the second sealing ring 10 and the inner wall of the nozzle base 1 form a seal. A guide sleeve 7 is arranged between the sliding sleeve 2 and the nozzle base 1, and the guide sleeve 7 is used to prevent relative rotation between the nozzle base 1 and the sliding sleeve 2. A guide groove 12 is arranged on the sliding sleeve 2 near the air flow ejection direction of the nozzle 8. The purpose of the guide groove 12 is not to interfere with the nozzle when adjusting the nozzle position.

Claims

1. An adjustable nozzle for a jet mill, characterized in that: include: A nozzle base, wherein a sleeve is sleeved inside the nozzle base, an external thread is arranged on the outer side of the sleeve, an adjusting nut cooperates with the external thread on the outer side of the sleeve, the adjusting nut is axially fixed to the nozzle base, an air hole is arranged inside the sleeve, the air hole passes through the sleeve, and the front end of the sleeve is fixedly connected to the nozzle.

2. The adjustable nozzle of the air flow mill according to claim 1, characterized in that: The center line of the air hole and the center line of the nozzle base at least partially do not overlap.

3. The adjustable nozzle of the air flow mill according to claim 1, characterized in that: The sliding sleeve is provided with a scale.

4. The adjustable nozzle of the air flow mill according to claim 1, characterized in that A plurality of annular protrusions are arranged on the outer circumferential surface of the sliding sleeve, and the gaps between the annular protrusions form a groove, and a sealing ring is arranged in the groove.

5. The adjustable nozzle of the air flow mill according to claim 1, characterized in that: The sliding sleeve is provided with a guide groove, and the guide groove is provided on the nozzle installation side.

6. The adjustable nozzle of the air flow mill according to claim 1, characterized in that: The nozzle is arranged obliquely relative to the sliding sleeve.

7. The adjustable nozzle of the air flow mill according to claim 1, characterized in that: The adjusting nut is fixed on the nozzle base through a pressing plate.

8. The adjustable nozzle of the air flow mill according to claim 1, characterized in that: A thread joint is arranged on the rear end surface of the sliding sleeve.

9. The adjustable nozzle of the air flow mill according to claim 1, characterized in that: A guide sleeve is arranged on the contact surface between the sliding sleeve and the inner wall of the nozzle base.

10. The adjustable nozzle of the air flow mill according to claim 1, characterized in that: A sealing device is arranged between the nozzle and the front end surface of the sliding sleeve.

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