阅读说明：本技术 一种用于钢塑复合管内壁喷涂的弥散喷头 (Dispersion spray head for spraying inner wall of steel-plastic composite pipe ) 是由 易波 于 2021-08-25 设计创作，主要内容包括：本申请公开了一种用于钢塑复合管内壁喷涂的弥散喷头,包括用于安装和固定的外壳体,还包括转动安装在所述外壳体上的离心喷头,所述离心喷头内沿径向呈弧形设置有多条离心孔道,任一条所述离心孔道的一端与所述离心喷头的圆周侧壁相交形成喷射孔,所述离心孔道的另一端与进料管连通；所述外壳体内还设置有进气管,所述进气管内的高压气体推动设置在所述离心喷头端面上的叶轮使离心喷头高速转动。本发明通过采用气流驱动离心喷头进行离心喷涂,高速旋转的离心喷头能够实现管道内360°喷涂,使得喷涂的内衬会更加均匀。(The application discloses a dispersion sprayer for spraying the inner wall of a steel-plastic composite pipe, which comprises an outer shell for installation and fixation and a centrifugal sprayer rotationally installed on the outer shell, wherein a plurality of centrifugal orifices are radially arranged in the centrifugal sprayer in an arc shape, one end of each centrifugal orifice is intersected with the circumferential side wall of the centrifugal sprayer to form a spraying hole, and the other end of each centrifugal orifice is communicated with a feeding pipe; the centrifugal sprayer is characterized in that an air inlet pipe is further arranged in the outer shell, and high-pressure gas in the air inlet pipe pushes an impeller arranged on the end face of the centrifugal sprayer to enable the centrifugal sprayer to rotate at a high speed. According to the invention, the centrifugal spray head is driven by air flow to carry out centrifugal spraying, and the centrifugal spray head rotating at a high speed can realize 360-degree spraying in a pipeline, so that the sprayed lining can be more uniform.)

1. The utility model provides a disperse shower nozzle for spraying of steel-plastic composite pipe inner wall, is including being used for installation and fixed shell body (2), its characterized in that: the centrifugal sprayer is characterized by further comprising a centrifugal sprayer (7) rotatably mounted on the outer shell (2), a plurality of centrifugal channels (12) are radially and arcuately arranged in the centrifugal sprayer (7), one end of any one of the centrifugal channels (12) is intersected with the circumferential side wall of the centrifugal sprayer (7) to form a spray hole (8), and the other end of the centrifugal channel (12) is communicated with the feeding pipe (6); still be provided with intake pipe (1) in shell body (2), high-pressure gas in intake pipe (1) promotes to set up impeller (9) on centrifugal nozzle (7) terminal surface make centrifugal nozzle (7) high-speed the rotation.

2. The dispersion sprayer for spraying the inner wall of the steel-plastic composite pipe according to claim 1, wherein the dispersion sprayer comprises: outer shell (2) and centrifugal nozzle (7) rotate with the axle center and are connected, outer shell (2) are close to the one end of centrifugal nozzle (7) is provided with second end cover (4), second end cover (4) deviate from on one side of centrifugal nozzle (7) fixed first straight tube (14) of being provided with, there is second straight tube (15) through first sealed bearing (16) and second sealed bearing (17) coaxial arrangement in first straight tube (14), the terminal surface of second straight tube (15) with centrifugal nozzle (7) fixed connection.

3. The dispersion sprayer for spraying the inner wall of the steel-plastic composite pipe according to claim 2, wherein: the air inlet pipe is characterized in that a third straight pipe (22) is fixedly connected to the second end cover (4) and coaxially sleeved on the outer side of the first straight pipe (14), a second annular cavity (19) communicated with the air inlet pipe (1) in a sealing mode is formed between the third straight pipe (22) and the first straight pipe (14), and a plurality of first through holes (10) for high-pressure air to flow to the impeller (9) from the second annular cavity (19) are formed in the second end cover (4).

4. The dispersion sprayer for spraying the inner wall of the steel-plastic composite pipe according to claim 3, wherein the dispersion sprayer comprises: the free ends of the first straight pipe (14) and the third straight pipe (22) are connected in a closed mode, and a plurality of branch pipes (13) used for communicating the second annular cavity (19) with the air inlet pipe (1) are arranged on the side wall of the third straight pipe (22).

5. The dispersion sprayer for spraying the inner wall of the steel-plastic composite pipe according to claim 4, wherein the dispersion sprayer comprises: the centrifugal nozzle (7) is provided with a central hole, the end face of one side, far away from the outer shell (2), of the centrifugal nozzle (7) is also provided with impellers (9) which are arranged in the same direction, the air inlet pipe (1) penetrates through the central hole and is fixedly connected with the first end cover (3), a gap is formed between the first end cover (3) and the impellers (9), and the circumferential side wall, close to the first end cover (3), of the air inlet pipe (1) is provided with a plurality of second through holes for high-pressure gas to escape; a third sealing bearing (18) is arranged at the position, close to the second through hole, of the centrifugal nozzle (7) and the air inlet pipe (1), and another third sealing bearing (18) is also arranged between the air inlet pipe (1) and the second straight pipe (15);

the one end of inlet pipe (6) is close to branch pipe (13) department at intake pipe (1) and runs through inside intake pipe (1) and extend along the one end of centrifugal nozzle (7), two run through between sealed bearing (18) intake pipe (1), the free end of inlet pipe (6) with first annular chamber (11) intercommunication that form between intake pipe (1) and the second straight tube (15).

6. The dispersion sprayer for spraying the inner wall of the steel-plastic composite pipe according to claim 5, wherein: the centrifugal holes (12) are distributed in a circular array on the same radial section and are arranged in at least two rows along the axial direction of the centrifugal nozzle (7).

7. The dispersion sprayer for spraying the inner wall of the steel-plastic composite pipe according to claim 6, wherein the dispersion sprayer comprises: and V-shaped grooves (20) are formed in the sections of the centrifugal holes (12) in any row in the central hole of the centrifugal nozzle (7).

8. The dispersion sprayer for spraying the inner wall of the steel-plastic composite pipe according to any one of claims 5 to 7, wherein: the edge of the first end cover (3) and the edge of the second end cover (4) are both towards one side of the centrifugal nozzle (7) is vertically bent and extends to the junction of the impeller (9) and the centrifugal nozzle (7) to form an annular bent edge, and the end face of the annular bent edge is chamfered inwards to form a flow guide inclined plane (21).

9. The dispersion sprayer for spraying the inner wall of the steel-plastic composite pipe according to claim 8, wherein: the included angle between the diversion inclined plane (21) and the end face of the annular bent edge is 30-45 degrees.

10. The dispersion sprayer for spraying the inner wall of the steel-plastic composite pipe according to claim 9, wherein: and one end of the outer shell (2) far away from the centrifugal nozzle (7) is provided with an integrally formed screwed joint (5).

Technical Field

The invention relates to the technical field of pipe processing, in particular to the field of a lining spraying processing device of a steel-plastic composite pipe, and specifically relates to a dispersion spray head for spraying the inner wall of the steel-plastic composite pipe.

Background

The composite steel pipe is also called steel-plastic composite pipe, and usually uses seamless steel pipe and welded steel pipe as base pipe, and its inner wall is coated with high-adhesion, corrosion-resistant and food-grade sanitary polyethylene powder paint or epoxy resin paint. The water-supply galvanized internal plastic-coated composite steel pipe manufactured by adopting the processes of pretreatment, preheating, internal coating, leveling and post-treatment is an upgraded product of the traditional galvanized pipe, and the steel-plastic composite pipe is generally connected by screw threads, grooves and flanges.

The existing lining process of the steel-plastic composite pipe can be roughly divided into two types, namely spraying and hot melting lining, and the application provides a dispersion spray head for spraying the inner wall of the steel-plastic composite pipe.

Disclosure of Invention

In order to solve the difficult problem that when the steel-plastic composite pipe lining is processed by adopting a spraying mode in the prior art, the steel pipe is exposed due to too thin spraying, and the spraying material is wasted due to too thick spraying, the application provides a dispersion sprayer for spraying the inner wall of the steel-plastic composite pipe, 360-degree rotary spraying can be uniformly realized in the pipe wall, the thickness of the sprayed lining can be freely set by adjusting the axial moving speed of the dispersion sprayer, and the spraying requirements of different pipe diameters and different lining thicknesses can be met. The centrifugal spraying is adopted, the sprayed coating or powder is driven to be quickly attached to the inner wall of the steel pipe by strong centrifugal force generated by the high-speed rotating nozzle, and the spraying is realized by the centrifugal nozzle, and meanwhile, the linear motion track of the original material or powder can be changed while driving airflow escapes by adopting pneumatic driving, so that a uniform spraying belt which is uniformly wrapped around the centrifugal nozzle and is dispersed is formed, and the condition that the local concentration and the uneven spraying are generated because the concentrated spraying concentrated belt is formed on the inner wall of the steel pipe by the linear spraying mode is avoided.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

a dispersion spray head for spraying the inner wall of a steel-plastic composite pipe comprises an outer shell for installation and fixation and a centrifugal spray head rotatably installed on the outer shell, wherein a plurality of centrifugal ducts are radially and arcuately arranged in the centrifugal spray head, one end of any centrifugal duct is intersected with the circumferential side wall of the centrifugal spray head to form a spray hole, and the other end of the centrifugal duct is communicated with a feeding pipe; the centrifugal sprayer is characterized in that an air inlet pipe is further arranged in the outer shell, and high-pressure gas in the air inlet pipe pushes an impeller arranged on the end face of the centrifugal sprayer to enable the centrifugal sprayer to rotate at a high speed.

The structure cooperation and the working principle are as follows:

the outer shell is a supporting structural member for fixing and installing the whole dispersion spray head, and is a fixing structure for supporting the dispersion spray head in the actual spraying process. The centrifugal nozzle is a main structure for realizing spraying, the centrifugal nozzle is driven to rotate at a high speed by high-pressure gas flowing in the air inlet pipe, and the high-pressure gas in the air inlet pipe can be communicated with an existing pressure storage tank or an air compressor to provide a high-pressure gas source. The high-pressure gas finally reaches the impeller through the gas inlet pipe, the impeller is pushed by the gas flow to continuously drive the centrifugal nozzle to rotate at a high speed, so that centrifugal force is generated to centrifugally throw out liquid materials or solid powder which are conveyed by the feeding pipe and need to be sprayed from the spraying hole at a high speed through the centrifugal hole, and finally the liquid materials or the solid powder is attached to the inner wall of the steel pipe to be sprayed to form a lining. The application of the centrifugal nozzle driven by high-pressure gas to rotate at high speed and spray coating in the steel-plastic composite pipe by using centrifugal force has originality. The most technical effect is that in the spraying process of the inner wall of the pipeline, based on a relatively closed environment, the only thing which can disturb the air is the air flow sprayed from the air inlet pipe, however, in the centrifugal spraying process, under the action of centrifugal force, the material, whether liquid or solid particles, can move linearly after leaving the spray hole in the environment without air disturbance, and thus, the spraying on the inner wall of the pipeline can be uneven. If the axial movement speed of the centrifugal nozzle relative to the steel pipe is too high during spraying, a spraying blind area is easy to occur, so that the inner wall of the steel pipe cannot be completely covered by the lining of the steel pipe; if the moving speed is too slow during spraying, the material overstocks easily, and a locally accumulated annular lining is formed on the inner wall of the pipeline, so that the smoothness of the inner wall of the pipeline is greatly reduced, and the pipeline resistance in practical use is increased. This application is carrying out the centrifugal spraying in-process, the linear motion state of material can be disturbed to the gas that overflows behind the intake pipe drive centrifugal spray for the material takes place slight disorder after breaking away from centrifugal spray, forms dispersed group, it can be bigger for the area of nature centrifugal spraying to make the material finally attach to the area on the steel pipe inner wall, but the inside lining of spraying formation on the steel pipe inner wall can be more even, fine overcoming the inhomogeneous problem of inside lining that concentrated spraying caused. Of course, it should be noted that the direction of the gas escaping after the air inlet pipe drives the centrifugal nozzle can be set by the outer shell according to actual requirements to play a role of flow guiding, and although there are various ways for setting the structure, the following principle is the same, that is: the larger the included angle between the air flow direction and the material spraying moving direction is, the more violent the air flow causes material turbulence and changes the material moving direction, on the contrary, if the included angle between the air flow direction and the material spraying moving direction is smaller, the turbulence is formed, the dispersion phenomenon is slight, the specific structure can be flexibly set according to the principle, for those skilled in the art, the principle can be grasped to set various structural schemes, and details are not described herein.

As the preferred structural design of this application for centrifugal nozzle can be stable with the shell body rotates to be connected and keep structure compact as far as possible, reduces whole dispersion shower nozzle's external dimension, preferably, the shell body rotates with the centrifugal nozzle with the axle center and is connected, the shell body is close to centrifugal nozzle's one end is provided with the second end cover, the second end cover deviates from fixed first straight tube that is provided with on one side of centrifugal nozzle, first straight tube is intraductal through first sealed bearing and second sealed bearing coaxial arrangement has the second straight tube, the terminal surface of second straight tube with centrifugal nozzle fixed connection.

The structure principle is as follows:

the second straight tube with centrifugal nozzle fixed connection, first straight tube and second end cover fixed connection, second end cover and shell body fixed connection make centrifugal nozzle can be stable rotatory for static shell body through first sealed bearing and second sealed bearing connection. Meanwhile, the structure size can be controlled to be small by adopting the rotary connection between the sleeve pipe structures, and a gas flow passage and the like can be established by utilizing the inner space of the sleeve pipe.

In order to further optimize the gas flow passage and improve the compactness of the structure, preferably, the second end cover is further fixedly connected with a third straight pipe which is coaxially sleeved outside the first straight pipe, a second annular cavity communicated with the air inlet pipe in a sealing manner is formed between the third straight pipe and the first straight pipe, and a plurality of first through holes for allowing high-pressure gas to flow to the impeller from the second annular cavity are formed in the second end cover.

The structure and the working principle are briefly described as follows:

the first straight pipe and the third straight pipe are coaxially, fixedly, hermetically connected and communicated with the air inlet pipe, and high-pressure gas in the air inlet pipe enters the second annular cavity and then contacts with the impeller through the first through hole to push the impeller to drive the centrifugal nozzle to rotate. The rotation of the centrifugal nozzle and the material injection cannot be influenced by adopting the injection structure, and meanwhile, an air passage does not need to be independently arranged, so that the structure is very compact, and the realization of other spraying functions is not influenced.

In order to facilitate manufacturing and reduce assembly difficulty and complexity of the mold, preferably, the free ends of the first straight pipe and the third straight pipe are connected in a closed manner, and a plurality of branch pipes used for communicating the second annular cavity with the air inlet pipe are arranged on the side wall of the third straight pipe.

In order to further improve the dispersion effect in the material spraying process, preferably, the centrifugal nozzle is provided with a central hole, the end surface of one side of the centrifugal nozzle, which is far away from the outer shell, is also provided with the impellers arranged in the same direction, the air inlet pipe penetrates through the central hole and is fixedly connected with the first end cover, a gap is formed between the first end cover and the impellers, and the circumferential side wall of the air inlet pipe, which is close to the first end cover, is provided with a plurality of second through holes for high-pressure gas to escape; a third sealing bearing is arranged at the position, close to the second through hole, of the centrifugal nozzle and the air inlet pipe, and another third sealing bearing is also arranged between the air inlet pipe and the second straight pipe;

one end of the inlet pipe runs through the inside of the inlet pipe and extends along one end of the centrifugal nozzle at the position where the inlet pipe is close to the branch pipe, and runs through the inlet pipe between the sealing bearings, the free end of the inlet pipe and a first annular cavity formed between the inlet pipe and the second straight pipe are communicated.

In order to improve the uniformity of material spraying, the centrifugal ducts are preferably distributed in a circular array on the same radial section and are provided with at least two rows along the axial direction of the centrifugal nozzle.

In order to avoid the deposition of materials, the materials can quickly enter the centrifugal holes, and preferably, a V-shaped groove is formed in the section of any row of the centrifugal holes in the central hole of the centrifugal nozzle.

In order to improve the dispersion degree that the material sprays, simultaneously for dispersion bandwidth is controllable, preferably, the edge of first end cover and second end cover all to one side vertical bending of centrifugal nozzle and extend to impeller and centrifugal nozzle's juncture forms the annular limit of buckling, the inside chamfer of terminal surface on the annular limit of buckling forms water conservancy diversion inclined plane. The symmetrical structure design of first end cover and second end cover adds the water conservancy diversion inclined plane and can make the air current form the air current area that the acute angle intersects each other for the material that sprays is diluted and redirecting by the air current and reach atomizing or dispersed technological effect in the middle of the air current area of both sides, thereby can form more even inner liner on the steel pipe inner wall.

In order to further optimize the air flow dispersion effect, the included angle between the diversion inclined plane and the end face of the annular bent edge is preferably 30-45 degrees. The larger the included angle between the diversion inclined plane and the end face of the annular bending edge is, the wider the dispersion belt width sprayed on the inner wall of the steel pipe is, and the smaller the angle is, the narrower the width of the dispersion belt is. It is worth to be noted that the inclination degree of the diversion inclined plane should be set in combination with the width of the centrifugal nozzle, and under the condition of the same inclination angle, the larger the width of the centrifugal nozzle, the larger the width of the dispersion band generated, and vice versa.

In order to facilitate the installation of the spray head, preferably, one end of the outer shell body, which is far away from the centrifugal spray head, is provided with an integrally formed threaded joint.

Has the advantages that:

according to the invention, the centrifugal spray head is driven by air flow to carry out centrifugal spraying, and the centrifugal spray head rotating at a high speed can realize 360-degree spraying in a pipeline, so that the sprayed lining can be more uniform. Meanwhile, the air flow driving the centrifugal nozzle to rotate is discharged to disturb the sprayed materials to form secondary atomization or dispersion, so that an even dispersion band is formed, the spraying uniformity is further improved, and the problem of spraying omission or local deposition in the conventional linear spraying is solved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is an isometric view of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a sectional view taken along a sectional symbol a-a in fig. 2.

Fig. 4 is a sectional view taken along a section symbol B-B in fig. 2.

Fig. 5 is a sectional view taken along the section symbol C-C in fig. 2.

Fig. 6 is an enlarged view of the structure of region D in fig. 5.

Fig. 7 is an enlarged view of the structure of region E in fig. 5.

Fig. 8 is an enlarged view of the structure of region F in fig. 5.

Fig. 9 is a schematic view of the internal structure of fig. 1.

Fig. 10 is a schematic view of the internal structure of fig. 9 including the centrifugal nozzle.

Fig. 11 is a schematic view of the spray in the absence of an intervening air stream to effect dispersion.

FIG. 12 is a schematic view of the present application with air flow intervention for dispersion spraying.

In the figure: 1, an air inlet pipe; 2-an outer shell; 3-a first end cap; 4-a second end cap; 5-a threaded joint; 6-feeding pipe; 7-centrifugal spray head; 8-jet hole; 9-an impeller; 10-a first via; 11-a first ring cavity; 12-a centrifugal tunnel; 13-branch pipe; 14-a first straight pipe; 15-a second straight pipe; 16-a first sealed bearing; 17-a second sealed bearing; 18-a third sealed bearing; 19-a second annular cavity; 20-V type groove; 21-a flow guiding inclined plane; 22-third straight tube.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application. Furthermore, the appearances of the terms "first," "second," and the like in the description herein are only used for distinguishing between similar elements and are not intended to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present application do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example 1:

the dispersion spray head for spraying the inner wall of the steel-plastic composite pipe, which is shown in the attached drawings 1-6 in the specification, comprises an outer shell 2 for installation and fixation, and further comprises a centrifugal spray head 7 rotatably installed on the outer shell 2, wherein a plurality of centrifugal orifices 12 are radially and arcuately arranged in the centrifugal spray head 7, one end of any one centrifugal orifice 12 intersects with the circumferential side wall of the centrifugal spray head 7 to form a spray hole 8, and the other end of the centrifugal orifice 12 is communicated with a feeding pipe 6; an air inlet pipe 1 is further arranged in the outer shell 2, and high-pressure air in the air inlet pipe 1 pushes an impeller 9 arranged on the end face of the centrifugal nozzle 7 to enable the centrifugal nozzle 7 to rotate at a high speed.

The structure cooperation and the working principle are as follows:

the outer shell 2 is a support structure for fixing and mounting the whole dispersion nozzle, and is a fixing structure for supporting the dispersion nozzle in the actual spraying process. Centrifugal nozzle 7 is the primary structure who is used for realizing the spraying, and high-pressure gas through flowing in intake pipe 1 drives centrifugal nozzle 7 high-speed rotatory, high-pressure gas accessible and current pressure accumulator tank or air compressor machine intercommunication in the intake pipe 1 provide and are used for providing high-pressure gas source. The high-pressure gas finally reaches the impeller 9 through the gas inlet pipe 1, the impeller 9 is pushed by the gas flow to continuously drive the centrifugal nozzle 7 to rotate at a high speed, so that centrifugal force is generated to centrifugally throw out liquid materials or solid powder which are conveyed by the feeding pipe 6 and need to be sprayed from the spraying hole 8 at a high speed through the centrifugal hole 12, and finally the liquid materials or the solid powder is attached to the inner wall of the steel pipe to be sprayed to form a lining. The application of the centrifugal nozzle 7 driven by high-pressure gas to rotate at high speed and spray coating in the steel-plastic composite pipe by using centrifugal force has originality. The most technical effect is that in the spraying process of the inner wall of the pipeline, based on a relatively closed environment, the only thing which can disturb the air is the air flow sprayed out from the air inlet pipe 1, however, in the centrifugal spraying process, under the action of centrifugal force, the material, whether liquid or solid particles, can move linearly after leaving the spray hole 8 in the environment without air disturbance, and thus, the spraying on the inner wall of the pipeline can be uneven. If the axial movement speed of the centrifugal nozzle 7 relative to the steel pipe is too high during spraying, a spraying blind area is easy to occur, so that the inner wall of the steel pipe cannot be completely covered by the lining of the steel pipe; if the moving speed is too slow during spraying, the material overstocks easily, and a locally accumulated annular lining is formed on the inner wall of the pipeline, so that the smoothness of the inner wall of the pipeline is greatly reduced, and the pipeline resistance in practical use is increased. This application is carrying out the centrifugal spraying in-process, the linear motion state of material can be disturbed to the gas that overflows behind the 1 drive centrifugal nozzle 7 of intake pipe for the material takes place slight disorder after breaking away from centrifugal nozzle 7, form the dispersed group, it can be bigger for the area of nature centrifugal spraying to make the material finally attach to the area on the steel pipe inner wall, but the inside lining of spraying formation on the steel pipe inner wall can be more even, fine overcoming the inhomogeneous problem of inside lining that concentrated spraying caused. It should be noted that, of course, the direction of the gas escaping after the air inlet pipe 1 drives the centrifugal nozzle 7 can be set by the outer shell 2 according to actual requirements, so as to perform the function of guiding the flow, and although there are various ways for setting the structure, the following principle is the same, that is: the larger the included angle between the air flow direction and the material spraying moving direction is, the more violent the air flow causes material turbulence and changes the material moving direction, on the contrary, if the included angle between the air flow direction and the material spraying moving direction is smaller, the turbulence is formed, the dispersion phenomenon is slight, the specific structure can be flexibly set according to the principle, for those skilled in the art, the principle can be grasped to set various structural schemes, and details are not described herein.

Example 2:

as the preferred embodiment of this application, this embodiment in order to make centrifugal spray head 7 can be stable with shell body 2 rotate to be connected and keep structure as compact as possible, reduce the outside dimension of whole dispersion shower nozzle, further combine specification attached drawing 5-fig. 10 on embodiment 1's basis shown, shell body 2 rotates with the axle center with centrifugal spray head 7 to be connected, shell body 2 is close to centrifugal spray head 7's one end is provided with second end cap 4, second end cap 4 deviates from centrifugal spray head 7 on one side fixed first straight tube 14 that is provided with, install second straight tube 15 through first sealed bearing 16 and second sealed bearing 17 coaxial in the first straight tube 14, the terminal surface of second straight tube 15 with centrifugal spray head 7 fixed connection.

The structure principle is as follows:

the second straight pipe 15 is fixedly connected with the centrifugal nozzle 7, the first straight pipe 14 is fixedly connected with the second end cover 4, the second end cover 4 is fixedly connected with the outer shell 2, and the centrifugal nozzle 7 can stably rotate relative to the static outer shell 2 by connecting the first sealing bearing 16 and the second sealing bearing 17. Meanwhile, the structure size can be controlled to be small by adopting the rotary connection between the sleeve pipe structures, and a gas flow passage and the like can be established by utilizing the inner space of the sleeve pipe.

Example 3:

in order to further optimize the gas flow passage and improve the compactness of the structure, in this embodiment, a structure is further improved on the basis of embodiment 2, specifically, as shown in fig. 1 to 8, a third straight pipe 22 coaxially sleeved on the outer side of the first straight pipe 14 is further fixedly connected to the second end cap 4, a second annular cavity 19 hermetically communicated with the gas inlet pipe 1 is formed between the third straight pipe 22 and the first straight pipe 14, and a plurality of first through holes 10 for allowing high-pressure gas to flow from the second annular cavity 19 to the impeller 9 are formed in the second end cap 4.

The structure and the working principle are briefly described as follows:

the first straight pipe 14 and the third straight pipe 22 are coaxially, fixedly, hermetically connected and communicated with the air inlet pipe 1, and high-pressure gas in the air inlet pipe 1 enters the second annular cavity 19 and then contacts the impeller 9 through the first through hole 10, so that the impeller 9 is pushed to drive the centrifugal nozzle 7 to rotate. The adoption is penetrated the structure and can not influence the rotation of centrifugal nozzle 7, material injection, still need not set up the gas circuit passageway alone simultaneously for the very compact structure just does not influence the function realization of other any spraying.

Example 4:

in order to facilitate manufacturing and reduce assembly difficulty and complexity of a mold, in this embodiment, on the basis of embodiment 3, as shown in fig. 1 to fig. 10 of the specification, free ends of the first straight pipe 14 and the third straight pipe 22 are connected in a closed manner, and a plurality of branch pipes 13 for communicating the second annular cavity 19 and the air inlet pipe 1 are arranged on a side wall of the third straight pipe 22.

In order to further improve the dispersion effect in the material spraying process, preferably, the centrifugal nozzle 7 has a central hole, and the end surface of one side of the centrifugal nozzle 7, which is far away from the outer shell 2, is also provided with the impellers 9 arranged in the same direction, the air inlet pipe 1 penetrates through the central hole and is fixedly connected with the first end cover 3, a gap exists between the first end cover 3 and the impellers 9, and the circumferential side wall of the air inlet pipe 1, which is close to the first end cover 3, is provided with a plurality of second through holes for high-pressure gas to escape; a third sealing bearing 18 is arranged at the position, close to the second through hole, of the centrifugal nozzle 7 and the air inlet pipe 1, and another third sealing bearing 18 is also arranged between the air inlet pipe 1 and the second straight pipe 15;

one end of the inlet pipe 6 penetrates through the inside of the inlet pipe 1 at the position where the inlet pipe 1 is close to the branch pipe 13 and extends along one end of the centrifugal nozzle 7, the inlet pipe 1 penetrates between the two sealing bearings 18, as shown in the attached drawings 5 and 10 in detail, and the free end of the inlet pipe 6 is communicated with a first annular cavity 11 formed between the inlet pipe 1 and the second straight pipe 15. It is worth emphasizing that the above structure is one of the biggest technical points of the present embodiment, and the structure is realized to satisfy the condition that the material enters from the feeding pipe 6 and is smoothly conveyed into each centrifugal hole 12 in the centrifugal nozzle 7 without affecting the rotation of the centrifugal nozzle 7. The first annular cavity 11 also serves as a material conveying channel, and the problems of large volume and complex structure caused by the fact that other structural components are additionally arranged for meeting the requirement of rotary sealing connection independently are solved.

In order to improve the uniformity of the material spraying, in this embodiment, the centrifugal holes 12 are distributed in a circular array on the same radial cross section and are provided with at least two rows along the axial direction of the centrifugal nozzle 7. In order to avoid the accumulation of the materials, the materials can rapidly enter the centrifugal holes 12, and preferably, a V-shaped groove 20 is arranged in the central hole of the centrifugal nozzle 7 at the section of any row of the centrifugal holes 12.

In order to improve the dispersion degree of material injection, simultaneously for dispersion bandwidth is controllable, the edge of first end cover 3 and second end cover 4 all to one side vertical bending of centrifugal nozzle 7 and extend to impeller 9 forms the annular limit of buckling with centrifugal nozzle 7's juncture, the inside chamfer of terminal surface on the annular limit of buckling forms water conservancy diversion inclined plane 21. The symmetrical structure design of first end cover 3 and second end cover 4 adds water conservancy diversion inclined plane 21 and can make the air current form the air current area that the acute angle intersects each other for the material that sprays is diluted and redirecting by the air current and reach atomizing or dispersed technological effect in the middle of the air current area of both sides, thereby can form more even inner liner on the steel pipe inner wall.

In order to further optimize the air flow dispersion effect, in the embodiment, the included angle between the diversion inclined plane 21 and the end face of the annular bent edge is 30-45 degrees. The larger the included angle between the diversion inclined plane 21 and the end face of the annular bent edge is, the wider the dispersion belt width sprayed on the inner wall of the steel pipe is, and the smaller the angle is, the narrower the width of the dispersion belt is. It is worth to be noted that the inclination degree of the diversion inclined plane 21 should be set in combination with the width of the centrifugal nozzle 7, and under the same inclination angle condition, the larger the width of the centrifugal nozzle 7 is, the larger the width of the dispersion band is, and vice versa. Specifically, the spraying state in the non-dispersion state shown in fig. 11 and the spraying state in the dispersion state shown in fig. 12 are shown.

In order to facilitate the installation of the spray head, one end of the outer shell 2, which is far away from the centrifugal spray head 7, is provided with an integrally formed threaded joint 5.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.