CN212598877U

CN212598877U - High-efficiency water atomization metal powder nozzle

Info

Publication number: CN212598877U
Application number: CN202020973519.9U
Authority: CN
Inventors: 谢清明; 王亚杰; 冯敏; 刘望保
Original assignee: Zhuzhou Youruike Colored Equipment Co ltd
Current assignee: Zhuzhou Youruike Colored Equipment Co ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2021-02-26
Anticipated expiration: 2030-06-01

Abstract

The utility model relates to the technical field of metal powder preparation, and discloses a high-efficiency water atomization metal powder nozzle, which comprises a shell provided with a high-pressure water inlet, wherein an adjusting block and a nozzle core are sequentially arranged on the inner cylinder wall of the shell from top to bottom; the center of the nozzle core is provided with a conical through hole, the part of the outer wall of the adjusting block, which is close to the conical through hole of the nozzle core, is of an inclined surface structure, and the inclined surface structure of the adjusting block is embedded into the conical through hole of the nozzle core and has a gap with the surface of the conical through hole to form an annular spray hole for spraying water in the high-pressure water spray cavity. The annular spray holes between the nozzle core and the adjusting block form a specific flow channel, the sprayed water flow is continuous conical high-pressure jet flow, no special requirement is imposed on the installation position degree of the nozzle core, and high-pressure water can be sprayed to molten metal at any angle, so that the reliability of the molten metal impacted by the high-pressure water is ensured.

Description

High-efficiency water atomization metal powder nozzle

Technical Field

The utility model relates to a metal powder preparation technical field specifically, relates to a high-efficient water atomization metal powder nozzle.

Background

At present, high-pressure nozzles adopted in the domestic water atomization zinc powder preparation production process are mainly of a ring hole type and a combined type, the nozzle assembly mode adopts a welding mode, the higher requirements on the stability and the continuity of the zinc powder preparation process are difficult to ensure, and the preparation method is mainly embodied in several aspects:

1) the manufacturing and processing difficulty is high, and the process requirement is difficult to ensure;

2) residual stress exists on the nozzle in a welding mode to a great extent, so that the spraying angle of the nozzle hole is displaced, the nozzle hole cannot be completely aligned with zinc liquid flow, and the effect of preparing zinc powder cannot be achieved;

the patent represented by CN104107919B, a high pressure water atomizing nozzle, is improved for these welding defects, and the parts of the nozzle are connected by bolts instead, so that the welding stress influence is eliminated, but the following disadvantages still exist:

1) the annular-hole type nozzle has high requirement on the installation position degree of the nozzle, once the annular-hole type nozzle is dislocated, the water flow ejected from the annular hole can not eject the zinc liquid, and the effect of preparing the zinc powder can not be achieved;

2) the size of the jet hole of the ring-hole type nozzle finished product is fixed, the size of the jet hole cannot be adjusted, and the jet hole is gradually ground under the action of scouring in the using process, so that the flow of the water jet is changed, the flow speed is rapidly reduced, the impact force of the water jet is reduced, and the atomization effect is rapidly deteriorated;

3) the annular hole type nozzle is easily blocked by the reflected zinc liquid, and the production is seriously influenced;

these various factors negatively affect the efficiency of atomization and the rate of fines.

Disclosure of Invention

The utility model provides a technical problem lie in overcoming prior art's defect, provide a high-efficient water atomization metal powder nozzle that no stress deformation influences and high pressure water jet impact molten metal degree of reliability is high.

The purpose of the utility model is realized through the following technical scheme:

a high-efficiency water atomization metal powder nozzle comprises a shell provided with a high-pressure water inlet, wherein an adjusting block and a nozzle core are sequentially installed in an inner cylinder of the shell from top to bottom, a high-pressure water spraying cavity communicated with the high-pressure water inlet is formed by the outer wall of the nozzle core, the inner cylinder wall of the shell and the outer wall of the adjusting block, and a circulation hole for metal liquid circulation is formed in the center of the adjusting block.

The center of the nozzle core is provided with a conical through hole, the part of the outer wall of the adjusting block, which is close to the conical through hole of the nozzle core, is of an inclined surface structure, and the inclined surface structure of the adjusting block is embedded into the conical through hole of the nozzle core and has a gap with the surface of the conical through hole to form an annular spray hole for spraying water in the high-pressure water spray cavity.

Furthermore, the taper of the conical through hole is 25-60 degrees.

Furthermore, the clearance between the inclined plane structure and the surface of the conical through hole is gradually reduced from top to bottom.

Further, the gap is 0.1-1 mm.

Furthermore, the length of the conical surface through hole on the nozzle core is larger than that of the inclined surface structure of the adjusting block.

Furthermore, the adjusting block is provided with an adjusting structure which can adjust the size of the gap between the surface of the conical surface through hole and the inclined surface structure by moving the adjusting block up and down.

Furthermore, the adjusting structure is a fine thread arranged on the outer wall of the adjusting block, and a thread structure matched with the fine thread is arranged on the inner cylinder wall of the shell.

Still further, the circulation hole of adjusting block is the regulation hole that is used for adjusting fine thread and the helicitic texture degree of closure.

Furthermore, the nozzle comprises an end cover which is connected with the open end of the shell and limits the position of the nozzle core.

Furthermore, the shell and the end cover are connected through bolts, and a precise gasket is additionally plugged between the bolt connection surfaces of the shell and the end cover.

Compared with the prior art, the utility model discloses following beneficial effect has:

1) the annular spray holes between the nozzle core and the adjusting block form a specific flow channel, the sprayed water flow is continuous conical high-pressure jet flow, no special requirement is made on the accuracy of the mounting position of the nozzle core, and high-pressure water can be sprayed to the freely falling molten metal at any angle, so that the reliability of the molten metal impacted by the high-pressure water is ensured, and the atomization efficiency is remarkably improved;

2) the use abrasion of the water atomizing nozzle is fully considered, and the adjusting structure is creatively designed to adjust the gap between the surface of the conical surface through hole and the inclined surface structure, so that the fine powder effect is effectively ensured, and the overall service life of the water atomizing nozzle is prolonged;

3) the integral structure is simple, the shell is of an integrated structure, the doped welding relation is not needed, and the influence of stress deformation is thoroughly eliminated;

4) the atomizing efficiency is high, and has promoted the farine degree greatly, and atomizing metal powder granularity is more than 80 meshes, and this farine degree can fully satisfy metal powder's follow-up user demand, need not to sieve metal powder again.

Drawings

FIG. 1 is a sectional view of a water atomizing nozzle of the uniform fine powder type described in example 1;

FIG. 2 is a cross-sectional view of a nozzle core.

Detailed Description

The invention will be further described with reference to specific embodiments, wherein the drawings are designed solely for the purpose of illustration and not as a definition of the limits of the patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

The uniform fine powder type water atomization nozzle shown in fig. 1 is used for preparing various metal powders, the embodiment mainly aims at zinc powder preparation, and the uniform fine powder type water atomization nozzle comprises a shell 1 provided with a high-pressure water inlet, a water inlet pipe 7 is inserted into the high-pressure water inlet, the shell 1 is of a hollow cover-shaped structure, the center of the shell is provided with a through-flow hole for downward flow of molten zinc, an adjusting block 2 and a nozzle core 3 are sequentially installed in an inner cylinder of the shell from top to bottom, the nozzle core 3 is attached to the inner cylinder wall of the shell 1, the circumferential outer wall of the adjusting block 2 is spaced from the inner cylinder wall of the shell 1, a high-pressure water injection cavity 4 communicated with the high-pressure water inlet is formed between the outer wall of the nozzle core (namely the upper surface of the nozzle core), the inner cylinder wall of the shell and the circumferential outer wall of; the open end of the shell 1 is connected with an end cover 5 for limiting the nozzle core 3, the upper surface of the end cover is attached to the lower surface of the nozzle core, and the periphery of the end cover 5 extends out of a flange connecting part which is connected with the end face of the open end of the shell through bolts.

Specifically, as shown in fig. 1 and 2, the center of the nozzle core 3 is provided with a conical through hole 31, the part of the circumferential outer wall of the adjusting block 2, which is close to the conical through hole 31 of the nozzle core, is in a slope structure, the slope structure is embedded into the conical through hole of the nozzle core and has a gap with the surface of the conical through hole to form an annular nozzle hole for spraying water in the high-pressure water spray cavity, and the center of the end cover 5 is provided with an atomizing hole for impact atomization of high-pressure water sprayed by the annular nozzle hole and zinc liquid flowing down from the through. The annular spray hole is a continuous spray hole, the sprayed high-pressure water flow is continuous conical high-pressure jet flow, high-pressure water can generate spray impact on falling molten metal at any time, even if some parts are blocked, the high-pressure water can be continuously output to spray zinc liquid at other parts of the annular spray hole, the requirement on the precision of the installation position of the nozzle core by the annular spray hole is not high, the high-pressure water can be sprayed to the molten metal falling freely at any angle, the reliability of the molten metal subjected to the spray impact by the high-pressure water can be effectively ensured, and the efficient atomization production of metal powder is ensured; the metal liquid and the high-pressure water are impacted for many times in the atomization holes, and the particles are gradually refined and homogenized through repeated polishing of the high-pressure water.

Preferably, the taper of the conical surface through hole 31 is 25-60 degrees, the gap between the inclined surface structure and the surface of the conical surface through hole is preferably decreased from top to bottom, the force is further accumulated by the injection of high-pressure water, and the value of the gap range is 0.1-1 mm.

The annular spray hole can be in various shapes, such as a circle, a rectangle, an ellipse, and the like, and the circular spray hole is adopted in the embodiment, namely, the annular spray hole is a circular ring-shaped spray hole.

In the embodiment, high-pressure water with the pressure value of 15-25 MPa and the flow range of 20-50 m3/h is sprayed out from the annular spray holes to continuously impact the zinc liquid at high pressure for atomization, the obtained atomized zinc powder is more than 80 meshes, particles lower than 40 meshes cannot be generated, the fineness is high, multiple impacts of the high-pressure water sprayed by the water atomizing nozzle on the zinc powder have the uniform refining effect, the fineness of the obtained zinc powder can meet all subsequent purposes, and vibrating screen type screening equipment is not required to be configured for coarse and fine screening of the zinc powder.

Generally, the length of the conical surface through hole 31 on the nozzle core is larger than that of the inclined surface structure of the adjusting block, after the nozzle core 3 and the adjusting block 2 are installed, the upper surface of the nozzle core is higher than the initial end of the inclined surface structure of the adjusting block, so that a small triangular area is formed at the position, and water in a high-pressure water injection cavity can be conveniently guided to enter the area for injection.

Along with the live time extension, annular orifice must take place wearing and tearing, probably leads to the fine powder degree to reduce, then need change the water atomizing nozzle when can't making the zinc powder that satisfies the demand, this application for promoting the whole life of water atomizing nozzle, is equipped with the accessible and reciprocates the adjusting block with the adjusting block in order to adjust clearance size's between conical surface through-hole surface and the inclined plane structure regulation structure 22 on adjusting block 2. In addition, a precise gasket is additionally plugged between the end cover flange connecting part and the bolt connecting surface of the end face of the opening end of the shell, so that the effect of adjusting the optimal gap at the annular spray hole is achieved.

Specifically, in this embodiment, the top of the inner cylinder of the housing 1 extends along the flowing hole direction to form a column portion 11, the upper surface of the adjusting block 2 is provided with a groove adapted to the periphery of the column portion, the column portion 11 extends into the groove, the adjusting structure 22 is a fine thread disposed on the wall of the groove of the adjusting block, the specification of the fine thread is M90 × 1.5, and the outer wall of the column portion 11 of the housing is correspondingly provided with a thread structure adapted to the fine thread. When the annular spray hole is abraded (when the mesh number of the zinc powder is found to be not up to the standard or the time to be abraded is obtained according to the existing experimental data), the fine thread is screwed down for a certain amount along the thread structure on the columnar part by rotating the adjusting block, so that the abrasion generated by the annular spray hole can be compensated, and the atomized zinc powder is ensured to be still in the standard range.

In order to facilitate the quick adjustment structure for the up-and-down adjustment block, the present embodiment uses local materials, the flow holes 21 of the adjustment block are set as adjustment holes, the flow holes may be polygonal holes such as triangular holes, square holes or hexagonal holes, and the adjustment block can be rotated by extending a wrench with a conventional corresponding structure into the flow holes.

Of course, the adjusting structure of the present application is not limited to the fine thread, and any structure may be used as long as the adjusting block can be moved up and down by performing corresponding actions manually or automatically.

The nozzle core 3, the adjusting block 2 and the end cover 4 are all provided with a sealing ring 6 at the contact position with the inner cylinder wall of the shell 1, so that the friction among all parts is increased, and the pressure in the high-pressure water spraying cavity is fully ensured.

It should be understood that the above-mentioned embodiments are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A high-efficiency water atomization metal powder nozzle is characterized by comprising a shell (1) provided with a high-pressure water inlet, wherein an adjusting block (2) and a nozzle core (3) are sequentially installed in an inner cylinder of the shell from top to bottom, a high-pressure water injection cavity (4) communicated with the high-pressure water inlet is formed by the outer wall of the nozzle core, the inner cylinder wall of the shell and the outer wall of the adjusting block, and a circulation hole (21) for metal liquid to circulate is formed in the center of the adjusting block;

the center of the nozzle core (3) is provided with a conical through hole (31), the part of the outer wall of the adjusting block (2) close to the conical through hole of the nozzle core is of an inclined surface structure, and the inclined surface structure of the adjusting block is embedded into the conical through hole (31) of the nozzle core and has a gap with the surface of the conical through hole to form an annular spray hole for spraying water in the high-pressure water spray cavity.

2. A high efficiency water atomised metal powder nozzle as claimed in claim 1, characterised in that the taper of the conical bore (31) is 25 ° to 60 °.

3. The high efficiency water atomized metal powder spray nozzle of claim 2, wherein the gap between the bevel structure and the surface of the tapered through hole decreases from top to bottom.

4. A high efficiency water atomized metal powder spray nozzle as claimed in claim 1, 2 or 3, wherein the gap is 0.1 to 1 mm.

5. The high efficiency water atomized metal powder spray nozzle of claim 1, wherein the length of the tapered surface of the tapered through hole (31) on the nozzle core is greater than the length of the tapered surface of the tapered structure of the adjusting block.

6. The high-efficiency water-atomized metal powder nozzle as claimed in claim 1, wherein the adjusting block (2) is provided with an adjusting structure (22) capable of adjusting the size of the gap between the surface of the conical through hole and the inclined surface structure by moving the adjusting block up and down.

7. The high efficiency water atomized metal powder spray nozzle of claim 6 wherein the adjusting structure (22) is a fine thread formed on the outer wall of the adjusting block, and the inner wall of the housing is provided with a thread structure adapted to the fine thread.

8. The high efficiency water atomized metal powder spray nozzle of claim 7, wherein the flow hole (21) of the adjusting block is an adjusting hole for adjusting the degree of engagement of the fine thread and the thread structure.

9. A high efficiency water atomised metal powder nozzle as claimed in claim 1 or 7 further comprising an end cap (5) attached to the open end of the housing (1) and limiting the nozzle core (3).

10. A high efficiency water atomized metal powder spray tip as claimed in claim 9, wherein the housing is bolted to the end cap and a precision washer is inserted between the bolted faces of the housing and the end cap.