CN219334689U

CN219334689U - Middle-delivery type centrifugal spraying device

Info

Publication number: CN219334689U
Application number: CN202223457286.5U
Authority: CN
Inventors: 王宝双; 韩诗薇; 洪新仁; 肖金钊; 韦清民
Original assignee: Hubei Xingling Special Gearbox Co ltd
Current assignee: Hubei Xingling Special Gearbox Co ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-07-14
Anticipated expiration: 2032-12-23

Abstract

The utility model discloses a middle-delivery centrifugal spraying device, which comprises an inner pipe, wherein an outer pipe is sleeved on the outer side of the inner pipe, one end of the inner pipe is connected with a driving device, a rotating part of the driving device is connected with the outer pipe, and the driving device drives the outer pipe to rotate around the inner pipe; the end part of the outer tube is fixedly connected with a rotary spray head with an end cover, the rotary spray head covers the discharge end of the inner tube and is in clearance fit with the discharge end of the inner tube, and a plurality of paint spray outlets are arranged on the periphery of the rotary spray head; the utility model has the advantages of quick and uniform paint spraying and high spraying pressure.

Description

Middle-delivery type centrifugal spraying device

Technical Field

The utility model relates to the technical field of spraying construction of inner walls of pipelines, in particular to a medium-conveying type centrifugal spraying device.

Background

At present, various paints are often sprayed on the inner wall of a pipeline in various engineering construction operations so as to achieve the purposes of corrosion prevention, maintenance, reinforcement, filling and the like.

The surface of the inner cavity of the large-scale pipeline is sprayed by workers manually in the traditional mode; the mode has the advantages of high labor intensity, high labor cost, large pollution to the working environment and low production efficiency. Particularly, for pipelines with larger diameters, but workers cannot directly enter the inner cavity of the pipeline, the construction difficulty of spraying operation is high, the work efficiency is low, and the spraying quality cannot be effectively ensured. Thus, automatic spray guns and rotary cup spray guns are beginning to gradually replace the traditional manual spray coating approach.

The existing rotary cup type internal spraying process is used for spraying the paint on the inner wall of the steel pipe in an atomizing mode through centrifugal force generated by high-speed rotation of the rotary cup, and an internal anti-corrosion layer is formed. The device has high requirements on spraying pressure and uniformity when in use.

The utility model patent of publication No. CN217569336U discloses a small-bore steel pipe revolves cup type interior spraying device on 2022, 10 month and 14 days, relates to pipeline spraying technical field, including the mount pad, rotate on the mount pad and install the rocking arm, be provided with the multiunit in the rocking arm and keep away from each other gradually towards coating flow direction coating pipeline, the rocking arm is provided with the awl mouth at the coating pipeline end, the position department is provided with the spring groove outside the rocking arm awl mouth, be provided with the spring in the spring groove, and be provided with the telescopic link towards rocking arm axis quadrature direction in central point, the top of telescopic link is provided with the end cap, the end cap can with the tight fit of awl mouth.

The scheme mainly improves centrifugal force by arranging a plurality of groups of inclined coating pipelines so as to improve spraying pressure, but has the defects that high spraying pressure can be realized only by high rotating speed, but the feeding is not favored due to too high rotating speed, and the spraying flow is limited to a certain extent, so that the spraying operation is slower; and the power requirement on the rotary driving device is high, so that the driving device occupies large space, and the construction is not facilitated in the spraying operation of certain slender pipelines.

Disclosure of Invention

The utility model aims at solving the problems of the prior art, and provides a medium-delivery centrifugal spraying device which solves the problems of uneven spraying and insufficient spraying pressure of the coating in the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the middle-delivery centrifugal spraying device comprises an inner pipe, wherein an outer pipe is sleeved on the outer side of the inner pipe, one end of the inner pipe is connected with a driving device, a rotating part of the driving device is connected with the outer pipe, and the driving device drives the outer pipe to rotate around the inner pipe; the end part of the outer tube is fixedly connected with a rotary spray head with an end cover, the rotary spray head coats the discharge end of the inner tube and is in clearance fit with the discharge end of the inner tube, and a plurality of paint spray outlets are arranged on the periphery of the rotary spray head.

Further, the inner side of the end cover of the rotary nozzle is connected with a conical current guide body, and the conical current guide body extends to an inner cavity of the end part of the inner pipe.

Further, the paint spraying outlet is vertically or obliquely arranged along the central axis direction of the outer tube.

Further, the driving device is a pneumatic motor, the pneumatic motor comprises a cylinder sleeve, a rotor and blades, the rotor is fixedly sleeved on the outer side of the outer tube, the cylinder sleeve is eccentrically sleeved on the outer side of the rotor and is fixedly connected with the feeding end of the inner tube, a plurality of caulking grooves are formed in the circumference of the outer side of the rotor at intervals, and the blades are movably arranged in each caulking groove; the cylinder sleeve is respectively provided with a compressed air inlet and a compressed air outlet, and the compressed air inlet and the compressed air outlet are both connected with a compressed air channel between the cylinder sleeve and the rotor.

Further, the cylinder sleeve is rotatably connected with the rotor through bearings at two ends.

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

the paint flows from the inner cavity of the inner tube to the gap of the rotary spray head, the subsequent paint forms radial outward extrusion force to the paint in the gap of the rotary spray head, so that the paint has outward diffusion power, and after the paint flows into the gap of the rotary spray head from the inner cavity of the inner tube, the flowing space is reduced, the flow speed of the paint is increased, so that the paint is more uniformly and rapidly thrown out by the centrifugal force generated by the rotation of the rotary spray head, and the spraying pressure is increased.

Drawings

FIG. 1 is a schematic cross-sectional view of a center-feed centrifugal spray apparatus of the present utility model;

FIG. 2 is a schematic diagram of the operation of the pneumatic motor of the present utility model;

in the figure: 1. an inner tube; 2. an outer tube; 3. a paint ejection port; 4. a cylinder liner; 5. a rotor; 6. a blade; 7. a compressed air inlet; 8. a compressed air outlet; 9. a compressed air passage; 10. and (5) rotating the spray head.

Detailed Description

The following description of the embodiments of the present utility model will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present utility model, are within the scope of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," "outer," "horizontal," "vertical," and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not denote or imply that the apparatus 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.

As shown in fig. 1 to 2, a middle-delivery centrifugal spraying device comprises an inner pipe 1, wherein an outer pipe 2 is sleeved outside the inner pipe 1, one end of the inner pipe 1 is connected with a driving device, a rotating part of the driving device is connected with the outer pipe 2, and the driving device drives the outer pipe 2 to rotate around the inner pipe 1; the end part of the outer tube 2 is fixedly connected with a rotary spray head 10 with an end cover, the rotary spray head 10 coats the discharge end of the inner tube 1 and is in clearance fit with the discharge end of the inner tube 1, and a plurality of paint spray outlets 3 are arranged on the periphery of the rotary spray head 10.

One end of the whole spraying device stretches into the construction pipeline, one end of the inner pipe 1 is used for inputting paint, the other end of the inner pipe 1 is used for outputting paint, the driving device is fixed with the inner pipe 1, the driving device drives the outer pipe 2 to rotate, and the outer pipe 2 drives the rotary nozzle 10 to rotate; after the paint flows out from the output end of the inner pipe 1, the paint flows to the gap between the inner pipe 1 and the rotary nozzle 10 due to the fact that the rotary nozzle 10 coats the discharge end of the inner pipe 1, and then the paint is sprayed out at a high speed uniformly by centrifugal force generated by rotation of the rotary nozzle 10 and is sprayed on the inner wall of a construction pipeline, so that paint spraying work of the inner wall of the construction pipeline is completed.

Compared with the prior art, the scheme has the advantages that the paint flows to the gap of the rotary nozzle from the inner cavity of the inner pipe 1, the subsequent paint forms radial outward extrusion force to the paint at the gap of the rotary nozzle 10, the paint has outward diffusion power, and after the paint flows into the gap of the rotary nozzle 10 from the inner cavity of the inner pipe 1, the flow speed of the paint becomes fast due to the fact that the flow space becomes small, so that the centrifugal force generated by rotation of the rotary nozzle 10 is convenient to throw the paint more uniformly and rapidly, and the spraying pressure is improved.

Specifically, a conical flow guide body is connected to the inner side of the end cover of the rotary nozzle 10, and extends to the inner cavity of the end part of the inner tube 1. The design of the conical current guide body enables the paint to flow into the gap of the rotary nozzle more uniformly at the output end of the inner pipe 1, and reduces the resistance of the paint flowing to the gap of the rotary nozzle 10.

Specifically, the paint spraying opening 3 is vertically or obliquely arranged along the central axis direction of the outer tube 2.

Specifically, the driving device is a pneumatic motor, the pneumatic motor comprises a cylinder sleeve 4, a rotor 5 and blades 6, the rotor 5 is fixedly sleeved on the outer side of the outer tube 2, the cylinder sleeve 4 is eccentrically sleeved on the outer side of the rotor 5 and fixedly connected with the feeding end of the inner tube 1, a plurality of caulking grooves are formed in the circumference of the outer side of the rotor 5 at intervals, and the blades 6 are movably arranged in each caulking groove; the cylinder liner 4 is provided with a compressed air inlet 7 and a compressed air outlet 8, respectively, and the compressed air inlet 7 and the compressed air outlet 8 are both connected with a compressed air channel 9 between the cylinder liner 4 and the rotor 5.

The inner tube 1 fixes the cylinder sleeve 4 against rotation, and because the cylinder sleeve 4 and the rotor 5 are designed in different shafts, compressed air enters through the compressed air inlet 7 according to the tangential direction of the inner ring of the cylinder sleeve 4, the pushing blade 6 drives the rotor 5 to rotate, and is discharged from the compressed air outlet 8, and the rotor 5 drives the outer tube 2 to rotate.

Preferably, the blade 6 is a carbon-based blade to reduce weight.

The cylinder sleeve 4 and the rotor 5 are rotationally connected through bearings at two ends, so that a stable support is formed on the outer tube, and contact friction with the inner tube is avoided.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The middle-delivery centrifugal spraying device comprises an inner pipe (1), wherein an outer pipe (2) is sleeved on the outer side of the inner pipe (1), one end of the inner pipe (1) is connected with a driving device, a rotating part of the driving device is connected with the outer pipe (2), and the driving device drives the outer pipe (2) to rotate around the inner pipe (1); the novel paint spraying device is characterized in that the end part of the outer tube (2) is fixedly connected with a rotary spray head (10) with an end cover, the rotary spray head (10) coats the discharge end of the inner tube (1) and is in clearance fit with the discharge end of the inner tube (1), and a plurality of paint spraying ports (3) are formed in the periphery of the rotary spray head (10).

2. A centre-feed centrifugal spray apparatus according to claim 1, characterized in that the inner side of the end cap of the spinning nozzle (10) is connected with a conical flow conductor which extends to the end inner cavity of the inner tube (1).

3. A centre-feed centrifugal spray apparatus according to claim 1, characterized in that the paint outlet opening (3) is arranged vertically or obliquely in the direction of the centre axis of the outer tube (2).

4. The medium-speed centrifugal spraying device according to claim 1, wherein the driving device is a pneumatic motor, the pneumatic motor comprises a cylinder sleeve (4), a rotor (5) and blades (6), the rotor (5) is fixedly sleeved on the outer side of the outer tube (2), the cylinder sleeve (4) is eccentrically sleeved on the outer side of the rotor (5) and is fixedly connected with the feeding end of the inner tube (1), a plurality of caulking grooves are formed in the outer side circumference of the rotor (5) at intervals, and the blades (6) are movably arranged in each caulking groove; the cylinder sleeve (4) is respectively provided with a compressed air inlet (7) and a compressed air outlet (8), and the compressed air inlet (7) and the compressed air outlet (8) are both connected with a compressed air channel (9) between the cylinder sleeve (4) and the rotor (5).

5. A centre-feed centrifugal spray apparatus according to claim 4, characterized in that the cylinder liner (4) is rotatably connected to the rotor (5) by means of bearings at both ends.