CN216879901U

CN216879901U - Nozzle structure of nitrogen-blowing borax spraying device

Info

Publication number: CN216879901U
Application number: CN202220408169.0U
Authority: CN
Inventors: 张小龙
Original assignee: CISDI Engineering Co Ltd
Current assignee: CISDI Engineering Co Ltd
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2022-07-05
Anticipated expiration: 2032-02-24

Abstract

The utility model belongs to the technical field of steel pipe production, and relates to a nozzle structure of a nitrogen-blowing borax-spraying device, which comprises a guide cylinder and a plurality of blades arranged in the guide cylinder, wherein the guide cylinder is sequentially provided with a connecting section, a rotational flow section and a diffusion section along the axial direction according to a functional structure; the blades are uniformly distributed in the cyclone section, are streamline arc curved surfaces and incline to a certain angle in the outlet direction. The borax is enabled to rotate and advance along the inner wall of the diffusion section through diffusion rotational flow generated by the outlet of the rotational flow section, and is sprayed into the inner wall of the capillary at a stable angle after leaving the diffusion section; the stability of the spraying angle and the spraying speed after the borax leaves the nozzle is improved, and the hitting power of the borax on the iron scale on the inner wall of the capillary and the coating uniformity on the inner wall of the capillary are ensured.

Description

Nozzle structure of nitrogen-blowing borax spraying device

Technical Field

The utility model belongs to the technical field of steel pipe production, and relates to a nozzle structure of a nitrogen-blowing borax-spraying device.

Background

As one of the main deformation processes in the production of hot-rolled seamless steel pipes, piercing is the rolling of a solid billet into a hollow billet. In the production and transportation process of the high-temperature capillary, the high-temperature capillary is in contact with air to generate an oxidation phenomenon, and in the subsequent processing process, the scale on the inner surface of the capillary can form internal scabs and other quality defects to reduce the yield of finished steel pipes or directly scrap the finished steel pipes, and on the other hand, the loss of the core rod can be increased, the service life of the core rod is shortened, and the production cost is increased.

In order to remove the existing iron scales in the hollow billet and inhibit the continuous oxidation in the subsequent transportation process, a nitrogen-blowing borax-spraying device is arranged behind the perforating machine. The nitrogen-blowing and borax-spraying device blows borax particles into the steel pipe by using nitrogen as a medium, borax is melted into a molten state when meeting high temperature and is attached to the inner wall of the capillary, and a series of chemical reactions are carried out between the borax and iron scale, so that harmful solid iron scale is converted into beneficial liquid ferroferric oxide to become a molten lubricant, and meanwhile, an oxidation resistant film is generated on the inner wall of the capillary to prevent the surface from being reoxidized. The high-speed nitrogen blows out scale and air peeled off in the capillary, and the nitrogen is filled in the capillary to isolate the air from entering and inhibit the oxidation of the inner wall of the capillary.

The removal effect of the oxide scales on the inner wall of the capillary mainly depends on the spraying condition of the borax on the inner wall of the capillary, and the spraying effect of the borax is directly determined by the spraying and blowing unit. The nozzle is the main component of the blowing unit, and the design of the nozzle determines the antioxidant effect of the nitrogen-blowing borax-spraying system.

In the conventional nozzle structure design, the blade structure is a single-piece spiral or a multi-piece linear type. The single-chip spiral blade makes the mixed fluid of nitrogen and borax perform rotational flow motion along the surface of the blade, the blade has larger resistance to the fluid, the jet speed of an outlet is influenced, and the problem of nozzle blockage is also caused for a small-caliber nozzle. The problem of jet velocity is solved to the multi-disc linear type blade, but can't produce the diffusion whirl, and borax gets into the hollow billet with the straight line efflux form, receives the influence of gravity, and most borax falls to the hollow billet bottom, and borax is at the hollow billet inner wall distribution extremely inhomogeneous.

In a conventional nitrogen-blowing borax-spraying control mode, a nozzle is arranged on a fixed support, and the distance between the nozzle and the end part of a capillary tube is kept unchanged during working and is about 100-200 mm; in a novel control mode of the prior art, a nozzle is arranged on a movable bracket and extends into a capillary tube during operation; the temperature of the capillary tube exceeds 1000 ℃, the nozzle is fixed or extends into the capillary tube and works in a high-temperature environment, and corresponding cooling measures are not considered in the conventional nozzle structure design.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a nozzle structure of a nitrogen-blowing borax spraying apparatus, which enables sand spraying to be uniformly distributed on the inner wall of a capillary, and optimizes the spraying effect of borax.

In order to achieve the purpose, the utility model provides the following technical scheme: a nozzle structure of a nitrogen-blowing borax-spraying device comprises a guide cylinder and a plurality of blades arranged in the guide cylinder, wherein the guide cylinder is sequentially provided with a connecting section, a rotational flow section and a diffusion section along the axial direction according to a functional structure; the blades are uniformly distributed in the cyclone section, are streamline arc curved surfaces and incline at a certain angle towards the outlet direction.

Optionally, the length of the vane is the same as the length of the swirl section.

Optionally, a water-cooling interlayer is further disposed on the outer side of the guide cylinder, a water inlet is disposed at the bottom of the inlet side of the cyclone section, and a water outlet is disposed at the top of the outlet side of the diffusion section.

Optionally, the diffuser section is horn mouth shape, the length of this diffuser section is 100 ~ 150mm, and the contained angle of diffuser section and whirl section matches with the capillary internal diameter that corresponds.

The utility model has the beneficial effects that: according to the nozzle structure of the nitrogen-blowing borax-spraying device, borax is enabled to rotate and advance along the inner wall of the diffusion section through diffusion rotational flow generated by the outlet of the rotational flow section, and the borax is sprayed into the inner wall of a capillary at a stable angle after leaving the diffusion section; the stability of the spraying angle and the spraying speed of the borax after leaving the nozzle is improved, and the hitting power of the borax on the iron scale on the inner wall of the capillary and the coating uniformity on the inner wall of the capillary are ensured.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the utility model, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is an axial sectional view of a nozzle structure of a nitrogen-blowing borax-spraying device of the present invention;

fig. 2 is a schematic view a-a of fig. 1.

Reference numerals: guide cylinder 1, blade 2, water-cooling intermediate layer 3, linkage segment 4, whirl section 5, diffuser section 6.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the utility model only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the utility model thereto; to better illustrate 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.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

Referring to fig. 1-2, the nozzle structure of a nitrogen-blowing borax-spraying device is composed of a guide cylinder (1) and blades (2), wherein the guide cylinder (1) is axially divided into a connecting section (4), a cyclone section (5) and a diffusion section (6) according to a functional structure, and the blades (2) are uniformly distributed in the cyclone section (5) of the guide cylinder (1).

The connecting section (4) is connected with a nitrogen-blowing borax spraying system through a connecting pipe, a flange is arranged at the tail end of the connecting section and is butted with the connecting pipe, and mixed fluid of borax and nitrogen conveyed by a connecting pipeline is led into the rotational flow section (5); 4 blades (2) are uniformly distributed in the cyclone section (5), the 4 blades (2) are obliquely arranged, each blade (2) is processed into a streamline-shaped arc curved surface in advance, the blades (2) are inclined to the outlet direction by a certain angle, so that the wind resistance is reduced, and a diffusion cyclone is generated at the outlet of the cyclone section (5); the diffusion section (6) is in a horn mouth shape and is connected with the rotational flow section (5), the borax is enabled to rotate and advance along the inner wall of the diffusion section (6) by the diffusion rotational flow generated at the outlet of the rotational flow section (5), and the borax is sprayed into the inner wall of the capillary at a stable angle after leaving the diffusion section (6). The diffusion section (6) can improve the stability of the spraying angle and the spraying speed of the borax after leaving the nozzle, and ensure the hitting power of the borax on the oxide scale on the inner wall of the capillary and the coating uniformity on the inner wall of the capillary; a water cooling interlayer (3) is arranged on the outer sides of a diffusion section (6) and a rotational flow section (5) of the guide cylinder (1), circulating cooling water with certain pressure and temperature enters from a water inlet on the inlet side of the rotational flow section (5), flows out from a water return port on the outlet side of the diffusion section (6) and returns to a water treatment system for cooling and recycling; the water-cooling interlayer (3) can effectively isolate the radiant heat of the high-temperature capillary, reduce the heat influence of the high-temperature capillary on the nozzle, keep the nozzle at a proper temperature during working and ensure the service life of the nozzle.

In this embodiment, if the nozzle material is selected from high temperature resistant materials or other effective heat insulation and temperature reduction treatments are performed, the water-cooling interlayer (3) may be omitted or not connected with cooling water.

In the embodiment, the length L2 of the cyclone section (5) is the same as that of the blade (2), and the inner diameter D is related to the corresponding inner diameter of the capillary tube and the injection pressure.

In the embodiment, the length L1 of the diffuser section (6) is 100-150 mm, and the included angle alpha between the diffuser section (6) and the cyclone section (5) is related to the inner diameter of the corresponding capillary tube.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.

Claims

1. The utility model provides a nitrogen blowing spouts nozzle structure of borax device which characterized in that: the guide cylinder is sequentially provided with a connecting section, a rotational flow section and a diffusion section along the axial direction according to a functional structure;

the blades are uniformly distributed in the cyclone section, are streamline arc curved surfaces and incline at a certain angle towards the outlet direction.

2. The nozzle structure of a nitrogen-blowing borax-spraying device according to claim 1, characterized in that: the length of the blade is the same as that of the cyclone section.

3. The nozzle structure of a nitrogen-blowing borax-spraying device according to claim 1, characterized in that: the outer side of the guide cylinder is also provided with a water-cooling interlayer, the water-cooling interlayer is provided with a water inlet at the bottom of the inlet side of the cyclone section, and a water outlet is arranged at the top of the outlet side of the diffusion section.

4. The nozzle structure of a nitrogen-blowing borax-spraying device according to claim 1, characterized in that: the diffuser section is horn mouth form, and the length of this diffuser section is 100 ~ 150mm, and the contained angle of diffuser section and whirl section matches with the capillary internal diameter that corresponds.

5. The nozzle structure of a nitrogen-blowing borax-spraying device according to claim 1, characterized in that: the connecting section is connected with a nitrogen-blowing borax-spraying system through a connecting pipeline.