CN218982695U - Descaling nozzle current stabilizer - Google Patents

Abstract

The utility model relates to a descaling nozzle current stabilizer, which is a star-shaped current stabilizer consisting of a solid cylinder and a plurality of blades arranged on the periphery of the solid cylinder; the blades are arranged along the axial through length of the solid cylinder; the states between the blade ends and the corresponding ends of the solid cylinder include: the end parts of the blades are flush with the corresponding ends of the solid cylinders, the end parts of the blades are recessed in the corresponding ends of the solid cylinders, and the end parts of the blades protrude out of the corresponding ends of the solid cylinders; the current stabilizer is divided into the following 8 types: the two-end concave type, the outlet flush inlet concave type, the outlet convex inlet concave type, the outlet concave inlet flush type, the outlet convex inlet flush type, the outlet concave inlet convex type, the outlet flush inlet convex type and the two-end convex type. When in use, proper types of current stabilizers are selected according to the requirements of the descaling nozzles, so that the optimal descaling effect can be obtained.

Description

Descaling nozzle current stabilizer

Technical Field

The utility model relates to the technical field of high-pressure water descaling, in particular to a descaling nozzle current stabilizer.

Background

The steel is oxidized at high temperature, and a layer of compact oxide scale (namely scale) is formed on the surface of the steel. If the oxidized iron sheet is not removed before rolling, the oxidized iron sheet is pressed into the surface of the strip steel by a roller in the rolling process, and the surface quality of the strip steel is affected. In addition, the residual iron oxide scale can accelerate the abrasion of the roller and reduce the service life of the roller. When the strip steel needs to be pickled, the residual iron scale also increases the difficulty of pickling and increases the acid consumption. Therefore, the scale on the surface must be removed before rolling the billet.

The use of mechanical impact forces of high pressure water to remove scale (i.e., high pressure water descaling) is currently the most common and effective method. In the high-pressure water descaling system, high-pressure water generated by a high-pressure water pump enters a nozzle, and under the action of the nozzle, the high-pressure water forms a fan-shaped water beam with a large impact force and is sprayed onto the surface of a steel billet (or an intermediate billet). Under the action of the high-pressure fan-shaped water jet, the iron oxide scale undergoes the processes of being cut, quenched and contracted, being peeled off from the base metal of the matrix, being washed and leaving the surface of the steel billet (or intermediate billet), thereby removing the iron oxide scale.

The descaling nozzle is generally composed of a nozzle body, a filter, a current stabilizer, a spray head and the like, wherein the current stabilizer is arranged between the filter and a shrinkage accelerating section in front of the spray head, plays a role in rectifying and stabilizing current, and has great influence on final jet dynamic parameters and water jet stability.

The Chinese patent application with the application publication number of CN102950066A discloses a high-pressure descaling nozzle, which comprises a spray head assembly, a current stabilizer assembly, a welding base and a nut, wherein the current stabilizer assembly comprises a current stabilizer spray core, a current stabilizer front part and a current stabilizer rear part, and the current stabilizer spray core is rotationally fixed between the current stabilizer front part and the current stabilizer rear part. The water flow is filtered and rectified by the current stabilizer, and then guided by the current stabilizer spray core to form the water flow with the maximum speed, and the water flow is concentrated and uniformly sprayed out of the tungsten carbide spray head.

The Chinese patent with the publication number of CN200970557Y discloses a high-pressure descaling nozzle, which comprises a nozzle sleeve, a connecting sleeve, a steady flow cover, a nut and a laminar flow core, wherein the steady flow cover is internally provided with the laminar flow core, the axis of the laminar flow core adopts water drops, and a plurality of guide vanes are axially and symmetrically arranged on the axis.

The current descaling nozzle current stabilizer has a single structure and cannot better meet the field descaling requirement.

Disclosure of Invention

The utility model provides a descaling nozzle current stabilizer, which can form 9 different structures after being combined in different states between the end parts of blades and the corresponding ends of solid cylinders, and can obtain the best descaling effect by selecting a proper type of current stabilizer structure according to the requirements of a descaling nozzle when in use.

In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:

a descaling nozzle current stabilizer comprises a current stabilizer arranged in a descaling nozzle; the current stabilizer is a star-shaped current stabilizer consisting of a solid cylinder and a plurality of blades arranged on the periphery of the solid cylinder; the blades are arranged along the axial through length of the solid cylinder; the states between the blade ends and the corresponding ends of the solid cylinder include: the end parts of the blades are flush with the corresponding ends of the solid cylinders, the end parts of the blades are recessed in the corresponding ends of the solid cylinders, and the end parts of the blades protrude out of the corresponding ends of the solid cylinders; the current stabilizer is divided into the following 8 types: the two-end concave type, the outlet flush inlet concave type, the outlet convex inlet concave type, the outlet concave inlet flush type, the outlet convex inlet flush type, the outlet concave inlet convex type, the outlet flush inlet convex type and the two-end convex type.

Further, when the end parts of the blades are recessed in the corresponding ends of the solid cylinders, the distance between the two ends is 4-6 mm.

Further, when the end parts of the blades protrude out of the corresponding ends of the solid cylinders, the distance between the two ends is 4-6 mm.

Further, the number of the blades is at least 8, and the blades are uniformly arranged on the periphery of the solid cylinder along the circumferential direction.

Further, the flow stabilizer and the descaling nozzle are of an integrated structure.

Further, the material of the current stabilizer is tungsten carbide.

Compared with the prior art, the utility model has the beneficial effects that:

the blade end and the corresponding end of the solid cylinder are combined in different states to form 9 different structures, and when in use, a proper type of current stabilizer is selected according to the requirements of the descaling nozzle, so that the optimal descaling effect can be obtained.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic perspective view of a current stabilizer according to the present utility model.

FIG. 2 is a cross-sectional view of a descaling nozzle according to the present utility model.

Fig. 3a is a cross-sectional view of a current stabilizer in embodiment 1 of the present utility model.

FIG. 3b is a cross-sectional view of the current stabilizer of example 2 of the utility model.

FIG. 3c is a cross-sectional view of the current stabilizer of example 3 of the utility model.

FIG. 3d is a cross-sectional view of the current stabilizer of example 4 of the utility model.

Fig. 3e is a cross-sectional view of the current stabilizer in embodiment 5 of the utility model.

FIG. 3f is a cross-sectional view of a current stabilizer in example 6 of the utility model.

FIG. 3g is a cross-sectional view of a current stabilizer according to example 7 of the present utility model.

FIG. 3h is a cross-sectional view of a current stabilizer in example 8 of the utility model.

FIG. 3i is a cross-sectional view of the current stabilizer of comparative example 1 of the present utility model.

FIG. 4 is a graph of axial turbulence energy as a function of axial position in a single flow domain of a flow stabilizer in accordance with an embodiment of the present utility model.

FIG. 5 is a graph showing axial vorticity as a function of axial position in a single flow domain of a current stabilizer in accordance with an embodiment of the present utility model.

FIG. 6 is a graph showing the velocity of the central axis of a nozzle of a stabilizer according to an embodiment of the present utility model as a function of axial position.

Reference numerals illustrate:

in the figure: 1. flow stabilizer 11, solid cylinder 12, blade 13, flow stabilizer inlet end 14, flow stabilizer outlet end 2, spray head 3, shell 4, contracted accelerating section 5, filter 6, nozzle body

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present utility model. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The following is a further description of embodiments of the utility model, taken in conjunction with the accompanying drawings:

as shown in FIG. 2, the descaling nozzle current stabilizer of the utility model comprises a current stabilizer 1 arranged in a descaling nozzle; the current stabilizer 1 is a star-shaped current stabilizer consisting of a solid cylinder 11 and a plurality of blades 12 arranged on the periphery of the solid cylinder 11; the blades 12 are arranged along the axial through length of the solid cylinder 11; the state between the ends of the blades 12 and the corresponding ends of the solid cylinder 11 includes: the end parts of the blades 12 are flush with the corresponding ends of the solid cylinders 11, the end parts of the blades 12 are recessed in the corresponding ends of the solid cylinders 11, and the end parts of the blades 12 protrude out of the corresponding ends of the solid cylinders 11; the current stabilizer is divided into the following 8 types: the two-end concave type, the outlet flush inlet concave type, the outlet convex inlet concave type, the outlet concave inlet flush type, the outlet convex inlet flush type, the outlet concave inlet convex type, the outlet flush inlet convex type and the two-end convex type.

Further, when the end of the blade 12 is recessed in the corresponding end of the solid cylinder 11, the distance between the two is 4-6 mm.

Further, when the ends of the blades 12 protrude beyond the corresponding ends of the solid cylinders 11, the distance between the two is 4-6 mm.

Further, the number of the blades 12 is at least 8, and the blades are uniformly arranged along the circumferential direction at the periphery of the solid cylinder 11.

Further, the current stabilizer 1 and the descaling nozzle are of an integrated structure.

Further, the material of the current stabilizer 1 is tungsten carbide.

The utility model relates to a descaling nozzle current stabilizer, which comprises a current stabilizer 1, wherein the current stabilizer is a star-shaped current stabilizer.

Preferably, the stabilizer 1 is provided with 8 blades 12, and states between two ends of the blades 12 and the end face of the solid cylinder 11 are respectively: the states of the inlet end flush, the inlet end concave, the inlet end protrusion, the outlet end flush, the outlet end concave, the outlet end protrusion, the outlet and the inlet ends can be combined arbitrarily. The combined current stabilizer 1 with 9 different structures can be obtained, but the current stabilizer with 8 combined structures does not comprise a structure (current stabilizer with a conventional structure) in which two ends of one blade 12 are flush with the solid cylinder 11, and compared with the current stabilizer with the conventional structure, the current stabilizer with 8 combined structures has better performance in the aspects of reducing turbulent energy dissipation rate, reducing energy loss and improving dynamic parameters, and can obtain better descaling effect.

Preferably, the height of the depressions and protrusions at both ends of the blade 12 (the distance from the corresponding ends of the solid cylinder 11) is 5mm.

Preferably, the current stabilizer 1 is fixedly connected with the descaling nozzle body 6, and is integrally manufactured.

Preferably, the material of the current stabilizer 1 is tungsten carbide.

As shown in fig. 2, when the descaling nozzle flow stabilizer of the utility model works, water flows into the nozzle body 6 from the filter 5, flows into the shrinkage accelerating section 4 for accelerating after the flow is bunched and rectified by the flow stabilizer 1, a transition area is arranged between the shrinkage accelerating section 4 and the nozzle 2 (arranged at the spraying end of the nozzle body 6 through the shell 3), and the water flows into the nozzle 2 after passing through the shrinkage accelerating section 4 and the transition area and finally is sprayed out from the nozzle 2. The flow stabilizer 1 directly influences the flow state of high-pressure turbid circulating water in a flow field in the nozzle, and is used for carrying out integral flow stream on the high-pressure turbid circulating water entering from the filter 5, so that turbulent kinetic energy and energy dissipation are reduced, and pressure energy is converted into kinetic energy more efficiently.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present utility model within the scope of the technical concept of the present utility model, and all the simple modifications belong to the protection scope of the present utility model. In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further. Moreover, any combination of the various embodiments of the utility model can be made without departing from the spirit of the utility model, which should also be considered as disclosed herein.

In order to make the purposes, technical schemes and technical effects of the embodiments of the present utility model more clear, the technical schemes in the embodiments of the present utility model will now be clearly and completely described. The embodiments described below are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art without the benefit of the teachings of this utility model, are intended to be within the scope of the utility model.

[ example ]

As shown in fig. 3a, which is a cross-sectional view of the current stabilizer of example 1, the outlet end (left end, lower identical) of the current stabilizer is recessed in the corresponding end face of the solid cylinder, and the inlet end (right end, lower identical) of the current stabilizer is recessed in the corresponding end face of the solid cylinder, i.e. the two-end recessed current stabilizer.

As shown in fig. 3b, which is a cross-sectional view of the current stabilizer of example 2, the outlet end blade of the current stabilizer is flush with the corresponding end surface of the solid cylinder, and the inlet end blade is recessed within the corresponding end surface of the solid cylinder, i.e., the outlet is flush with the inlet recessed current stabilizer.

As shown in fig. 3c, which is a cross-sectional view of the current stabilizer of embodiment 3, the outlet end blade of the current stabilizer protrudes out of the corresponding end surface of the solid cylinder, and the inlet end blade is recessed in the corresponding end surface of the solid cylinder, i.e. the outlet protrudes into the recessed current stabilizer.

As shown in fig. 3d, which is a cross-sectional view of the current stabilizer of example 4, the outlet end blade of the current stabilizer is recessed within the corresponding end face of the solid cylinder, and the inlet end blade is flush with the corresponding end face of the solid cylinder, i.e., the outlet recessed inlet flush type current stabilizer.

As shown in fig. 3e, which is a cross-sectional view of the current stabilizer of example 5, the outlet end blade of the current stabilizer protrudes out of the corresponding end surface of the solid cylinder, and the inlet end blade is flush with the corresponding end surface of the solid cylinder, i.e. the outlet protrusion inlet flush type current stabilizer.

As shown in fig. 3f, which is a cross-sectional view of the current stabilizer of example 6, the outlet end blade of the current stabilizer is recessed within the corresponding end surface of the solid cylinder, and the inlet end blade protrudes out of the corresponding end surface of the solid cylinder, i.e. the outlet is recessed and the inlet is raised.

As shown in fig. 3g, which is a cross-sectional view of the current stabilizer of embodiment 7, the outlet end blade of the current stabilizer is flush with the corresponding end surface of the solid cylinder, and the inlet end blade protrudes out of the corresponding end surface of the solid cylinder, i.e. the outlet is flush with the inlet protrusion type current stabilizer.

As shown in fig. 3h, which is a cross-sectional view of the current stabilizer of example 8, the outlet end blade of the current stabilizer protrudes out of the corresponding end surface of the solid cylinder, and the inlet end blade protrudes out of the corresponding end surface of the solid cylinder, i.e. the two-end protrusion type current stabilizer.

As shown in fig. 3i, which is a cross-sectional view of the current stabilizer of comparative example 1, the outlet end blade of the current stabilizer is flush with the corresponding end face of the solid cylinder, and the inlet end blade is flush with the corresponding end face of the solid cylinder, i.e., the current stabilizer with flush ends. Comparative example 1 is a current stabilizer structure conventionally used in the present stage.

After simulation experiments are carried out on 9 different types of current stabilizers in examples 1-8 and comparative example 1 under the same working condition, the current stabilizers in examples 1-8 are superior to the current stabilizer in comparative example 1 in rectifying beam current, stabilizing flow field and improving dynamic parameters.

As shown in fig. 4-6, the horizontal axes of the coordinate system are all axial positions of the flow stabilizer, the vector value of the axial positions is the distance from the end face of the flow stabilizer close to one end of the nozzle head to the nozzle outlet, and the axial position of the nozzle outlet is 0.

The flow stabilizer of examples 1-8 and comparative example 1 were each provided with 8 blades, which divided the flow stabilizer flow field into 8 separate flow fields and were centered symmetrically with the same turbulence energy, vorticity, speed, etc. parameters and flow patterns when the simulation results were analyzed.

FIG. 4 is a graph showing the variation of axial turbulence energy with axial position in a single flow domain of a current stabilizer of different structures. The vertical axis of the coordinate system is the turbulence energy K. The line groups appearing along the positive direction of the transverse axis from-110 mm to-100 mm sequentially correspond to the structures of an inlet bulge type, an inlet flush type and an inlet recess type; wherein, the convex structure of the inlet can generate turbulent energy near the outlet of the current stabilizer; the maximum turbulence energy of the flush type structure of the outlet is smaller than that of the concave type structure of the outlet and the convex type structure of the outlet; the inlet flush structure and the inlet concave structure have a turbulence energy increasing trend near the inlet position of the flow stabilizer, and compared with other types, the flow stabilizer with the inlet concave structure and the outlet flush structure has smaller overall turbulence energy and smoother turbulence energy change trend.

FIG. 5 is a graph showing the variation of axial vorticity along with axial position in single flow field of different structure current stabilizer, the vertical axis of the coordinate system is vorticity, and the line groups between-110 mm and-100 mm along the positive direction of the axis are sequentially provided with inlet bulge type, inlet flush type and inlet concave type structures; the inlet bulge structure can generate vortex near the outlet position of the current stabilizer, so that the vortex quantity is increased; the inlet flush type structure and the inlet concave type structure have the tendency of increasing the vortex quantity near the inlet position of the current stabilizer, vortex is generated near the inlet of the current stabilizer, after the vortex is generated, the vortex quantity gradually decreases along with the increase of the axial distance, and finally, the vortex quantity tends to 0.

FIG. 6 is a graph of the variation of the speed of the central axis of the nozzle of the stabilizer with different structures along with the axial position, the vertical axis of the coordinate system is the speed, the variation trend of the speeds of various structures on the central axis is approximately the same, no speed distribution exists on the central axis because of the non-flow field of the center of the stabilizer, the speed increment of the inlet concave, the outlet flat and the outlet convex structures is larger between the outlet position of the stabilizer and the tail end of the contraction accelerating section, namely, in the range of-90 mm to-30 mm of the transverse axis; the horizontal axis is 0, namely the outlet position of the nozzle, and the outlet speeds of different types of structures are different, wherein the outlet speeds of the inlet concave outlet convex structure and the inlet convex outlet convex structure are smaller than those of two-end parallel-level structures, and other 6 groups of type current stabilizers can improve the outlet speed by at least 2.126m/s and at most 3.817m/s compared with the two-end parallel-level structures.

From the comparison, the descaling nozzle current stabilizer has the following beneficial effects: compared with the traditional two-end flush type current stabilizer, the integral turbulence energy of the inlet-concave-outlet flush type current stabilizer is smaller, the two-end concave-type structure is smaller, and the integral vortex quantity of the current stabilizer of the inlet-concave-outlet flush type structure is smaller. The current stabilizer with 6 structures such as concave at two ends, flat at the inlet concave outlet, concave at the inlet convex outlet, flat at the inlet convex outlet, concave at the inlet flat outlet, convex at the inlet flat outlet and the like has better dynamic performance than the current stabilizer with the traditional flat structure at two ends.

In summary, in practical application, the corresponding type of current stabilizer can be selected according to different requirements of the descaling nozzle, so as to obtain the optimal descaling effect.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme and the concept of the present utility model, and should be covered by the scope of the present utility model.

Claims (6)

1. A descaling nozzle current stabilizer comprises a current stabilizer arranged in a descaling nozzle; the flow stabilizer is characterized by comprising a solid cylinder and a star-shaped flow stabilizer formed by a plurality of blades arranged on the periphery of the solid cylinder; the blades are arranged along the axial through length of the solid cylinder; the states between the blade ends and the corresponding ends of the solid cylinder include: the end parts of the blades are flush with the corresponding ends of the solid cylinders, the end parts of the blades are recessed in the corresponding ends of the solid cylinders, and the end parts of the blades protrude out of the corresponding ends of the solid cylinders; the current stabilizer is divided into the following 8 types: the two-end concave type, the outlet flush inlet concave type, the outlet convex inlet concave type, the outlet concave inlet flush type, the outlet convex inlet flush type, the outlet concave inlet convex type, the outlet flush inlet convex type and the two-end convex type.

2. A descaling spray nozzle stabiliser as claimed in claim 1 in which the distance between the ends of the blades is 4 to 6mm when they are recessed within the corresponding ends of the solid cylinder.

3. A descaling spray nozzle flow stabilizer according to claim 1, wherein the distance between the blade ends is 4-6 mm when the blade ends protrude beyond the corresponding ends of the solid cylinder.

4. A descaling spray nozzle stabiliser as claimed in claim 1, 2 or 3 in which the number of vanes is at least 8 and is circumferentially uniform around the periphery of the solid cylinder.

5. A descaling spray nozzle current stabilizer according to claim 1, wherein the current stabilizer is integrally formed with the descaling spray nozzle.

6. A descaling spray nozzle current stabilizer according to claim 1, wherein the current stabilizer is made of tungsten carbide.

Images