CN114618725A

CN114618725A - Petroleum casing spraying process equipment

Info

Publication number: CN114618725A
Application number: CN202210238839.3A
Authority: CN
Inventors: 王哲
Original assignee: Yan'an Shoushan Machinery Manufacturing Co ltd
Current assignee: Yan'an Shoushan Machinery Manufacturing Co ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-06-14

Abstract

The invention provides a petroleum casing spraying device, and relates to the technical field of petroleum casings. The petroleum casing spraying equipment comprises a grinding assembly, a conveying assembly and a spraying mechanism, wherein the conveying assembly is parallelly provided with a plurality of working grooves, and the conveying assembly greatly lightens the labor intensity of workers; the grinding component grinds the outer wall of the petroleum casing pipe to be rough at the head end, so that the coating is sprayed on the back of the petroleum casing pipe more conveniently, and the coating is attached to the outer wall of the petroleum casing pipe more firmly; the plurality of working grooves 230 arranged on the conveying assembly can convey a plurality of oil casings to be sprayed at the same time, and the working efficiency is remarkably improved. In addition, the invention also provides a petroleum casing spraying process, which can ensure that the coating is firmly attached to the pipe wall, the spraying speed is high, the phenomena of coating leakage point and coating damage can not occur, and the working efficiency is high.

Description

Petroleum casing spraying process equipment

Technical Field

The invention relates to the technical field of petroleum casings, in particular to petroleum casing spraying equipment and a petroleum casing spraying process.

Background

The petroleum casing pipe is a life line for maintaining the operation of an oil well, and due to different geological conditions, the underground stress state is complex, and the comprehensive action of tensile stress, compression stress, bending stress and torsional stress acts on the pipe body, so that higher requirements are provided for the quality of the casing pipe, and once the casing pipe is damaged due to some reason, the yield of the whole well can be reduced, and even the whole well can be scrapped.

In order to prolong the service life of the petroleum casing pipe, the surface of the petroleum casing pipe is often sprayed with antirust paint in the generation process, and the petroleum casing pipe is prevented from being corroded, the surface of the petroleum casing pipe is generally sprayed by manually holding a spraying gun, the spraying process needs to manually support the stable petroleum casing pipe, the petroleum casing pipe needs to be manually turned, all positions of the petroleum casing pipe are sprayed, the whole process is extremely complicated, the labor intensity of workers is high, only one petroleum casing pipe can be sprayed at a time, and the working efficiency is low.

Disclosure of Invention

The invention aims to provide oil casing spraying equipment which can polish the outer wall of an oil casing to enable paint spraying to be firmer, a conveying assembly is used for conveying the oil casing, the working strength of workers is greatly reduced, a plurality of working grooves convey a plurality of oil casings, and meanwhile, spraying is carried out, so that the working efficiency is improved.

The invention also aims to provide a petroleum casing spraying process, which can ensure that a coating is firmly attached to the pipe wall, the spraying speed is high, the phenomena of coating leakage and coating damage can not occur, and the working efficiency is high.

The embodiment of the invention is realized by the following steps:

the embodiment of the application provides an oil casing spraying equipment, its package is including the subassembly of polishing, transfer assembly and spraying mechanism, and the transfer assembly parallel is equipped with a plurality of work grooves that are used for bushing, and transfer assembly includes first transfer portion, second transfer portion, and first transfer portion is located the mouth of pipe that advances of spraying mechanism, and second transfer portion is located the play mouth of pipe of spraying mechanism, and the subassembly of polishing is located one side of first transfer portion. The conveying assembly greatly reduces the labor intensity of workers; the polishing component polishes the outer wall of the petroleum casing pipe roughly at the head end, so that the coating can be sprayed more conveniently at the back, and the coating can be more firmly attached to the outer wall of the petroleum casing pipe; a plurality of work grooves that transfer assembly set up can convey a plurality of oil casings simultaneously and carry out the spraying, are showing and are improving work efficiency.

In some embodiments of the invention, the spray mechanism includes a high pressure spray chamber, a coating storage tank located outside the high pressure spray chamber, and an annular spray head located within the high pressure spray chamber, the coating storage tank and the annular spray head being connected. The coating sprayed in the high-pressure spraying chamber is more uniform and fine, the spraying operation is carried out in the relatively closed spraying box, the coating is prevented from being polluted by external dust, and the spraying effect is ensured.

In some embodiments of the invention, the number of annular spray heads corresponds one-to-one to the number of working grooves. The annular spray head is correspondingly arranged on each oil casing pipe, so that each pipe can be uniformly sprayed at 360 degrees, no leakage point is generated, the oil casing pipes do not need to be turned manually, time and labor are saved, and the working efficiency is improved.

In some embodiments of the invention, the spray mechanism further comprises a voltage controller for adjusting the spray rate. The voltage regulator can control the spraying speed of the annular spraying head and the size of the sprayed coating liquid drop. For thick paint, the spraying speed can be adjusted slowly, so that the sprayed paint liquid drops are larger; for thinner coating, the spraying speed can be adjusted to ensure that the sprayed coating liquid drops are smaller, thereby ensuring the spraying effect, ensuring the coating thickness to be uniform and avoiding coating waste.

In some embodiments of the invention, the spray mechanism further comprises an air dryer located inside the high pressure spray chamber near an end of the outlet nozzle. The setting of air dryer can carry out fast drying to the coating after the spraying, the design of coating with higher speed.

In some embodiments of the invention, the grinding assembly comprises a main roller, a slave roller and grinding abrasive paper wrapping the periphery of the petroleum casing pipe, wherein the main roller and the slave roller are arranged oppositely, the main roller and the slave roller are abutted against the petroleum pipeline, and the grinding abrasive paper is positioned between the main roller and the spraying mechanism. The rotation of main roller drives the oil casing pipe and transmits forward the time, prescribes a limit to the oil casing pipe in the abrasive paper of polishing from the roller, and the parcel is polished at oil casing pipe outlying abrasive paper of polishing to the oil casing pipe outer wall.

In some embodiments of the invention, the transfer assembly is a roller conveyor comprising a drive means, a support frame and a roller shaft, the roller shaft being provided with a plurality of slidable stops, adjacent stops forming a working channel. The number of the working grooves can be changed by adjusting the number of the limiting blocks, and the width of the working grooves can be changed by sliding the positions of the limiting blocks so as to be suitable for petroleum casings with different pipe diameters.

In some embodiments of the invention, the bottom of the high-pressure spraying chamber is provided with a coating purifying device and a tray for receiving residual coating, the tray is provided with a diversion port, the diversion port is connected with the coating purifying device, and the coating purifying device is connected with a coating storage tank. During the coating cloud that the spraying produced was collected the tray of high pressure coating cavity bottom, entered into clarification plant through the water conservancy diversion mouth, purified the back and flowed into the coating holding vessel, just can reuse, both made things convenient for and collected unnecessary coating cloud, reduced the pollution that causes operational environment again, improved the practicality.

In some embodiments of the invention, the grinding assembly, the conveying assembly and the bottom of the spraying mechanism are provided with rollers which are convenient to move. The pulley of polishing subassembly, transport assembly and spraying mechanism bottom makes things convenient for the mobile device, when the oil casing spraying of different length, can adjust the distance between polishing subassembly, transport assembly and the spraying mechanism three.

In another aspect, the invention provides a petroleum casing spraying process, which comprises the following steps:

(1) polishing: feeding the petroleum casing into the grinding assembly, treating the surface of the petroleum casing,

(2) pipe feeding: the first conveying part conveys the petroleum casing into the high-pressure spraying chamber, wherein the rotating speed of the roller shaft of the first conveying part is 100-300 r/min;

(3) spraying: pressurizing the coating to 30-50 Mpa by a high-pressure pump, then delivering the coating to the annular nozzle through a paint delivery pipeline, and spraying the coating on the surface of the petroleum casing pipe, wherein the coating thickness is as follows: 50-150 μm;

(4) air drying and curing: after the spraying is finished, the petroleum casing pipe is conveyed to the position of the air dryer, and the surface coating is cured by hot air, wherein the air drying temperature is 80-150 ℃.

(5) And (3) discharging pipes: and conveying the oil casing out of the high-pressure spraying chamber by using the second conveying part, wherein the rotating speed of the roller shaft of the second conveying part is 100-300 r/min, and spraying is finished.

Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:

1. the invention provides petroleum casing spraying equipment which comprises a grinding assembly, a conveying assembly and a spraying mechanism, wherein the conveying assembly is provided with a plurality of working grooves in parallel. The arrangement of the conveying assembly does not need to support and stabilize the petroleum casing pipe manually, so that the labor intensity of workers is greatly reduced; the grinding component grinds the outer wall of the petroleum casing pipe to be rough at the head end, so that the coating is sprayed on the back of the petroleum casing pipe more conveniently, and the coating is attached to the outer wall of the petroleum casing pipe more firmly; a plurality of work grooves that transfer assembly set up can convey a plurality of oil casings simultaneously and carry out the spraying, are showing and are improving work efficiency.

2. According to the petroleum casing spraying process, the process of polishing, spraying and air drying is adopted, the rough surface after polishing is more favorable for the coating to be attached to the outer wall of the petroleum casing, the coating is immediately air dried and solidified after spraying, the situation that the coating is scratched due to the fact that the coating is not dried in the subsequent conveying process can be avoided, and the working efficiency is also improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of an oil casing spraying device provided by an embodiment of the invention;

FIG. 2 is a schematic structural view of a ring-shaped showerhead;

FIG. 3 is a schematic structural view of a transfer assembly;

fig. 4 is a schematic structural view of the spray mechanism.

An icon: 100-grinding component, 110-main roller, 120-auxiliary roller, 130-grinding sand paper, 200-conveying component, 210-roller shaft, 220-limiting block, 230-working groove, 300-first conveying part, 400-second conveying part, 500-spraying mechanism, 510-high-pressure spraying chamber, 520-coating storage tank, 530-annular nozzle, 540-air dryer, 550-tray, 560-coating purifying equipment, 600-mixing wheel and 700-petroleum casing.

Detailed Description

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

Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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 invention.

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 embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements that are referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, 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 embodiments of the present invention, "a plurality" represents at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be broadly construed and interpreted as including, for example, fixed connections, detachable connections, or integral connections; 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example 1

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an oil casing spraying apparatus according to an embodiment of the present invention; fig. 2 is a schematic structural view of the annular showerhead.

The embodiment provides an oil casing spraying device, which comprises a grinding component 100, a conveying component 200 and a spraying mechanism 500, wherein the conveying component 200 comprises a first conveying part 300 and a second conveying part 400, the first conveying part 300 is positioned at an inlet pipe orifice of the spraying mechanism 500, the second conveying part 400 is positioned at an outlet pipe orifice of the spraying mechanism 500, and the head end of the first conveying part 300 is provided with the grinding component 100. The bottom of the grinding assembly 100, the bottom of the conveying assembly 200 and the bottom of the spraying mechanism 500 are provided with rollers which are convenient to move.

Specifically, the sanding assembly 100 includes a master roller 110, a slave roller 120, and sanding paper 130 wrapped around the periphery of the oil casing 700. The middle parts of the main roller 110 and the slave roller 120 are both arranged in a U shape, so that the situation that the petroleum casing pipe 700 deviates in the transmission process is avoided, and the peripheries of the petroleum casing pipe 700 in front of and behind the main roller 110 and the slave roller 120 are both provided with polishing sand paper 130. The rotation of the main rollers 110 drives the oil casing 700 to be conveyed forward under the cooperation of the auxiliary rollers 120, and is just limited in the grinding sand paper 130, and the grinding sand paper 130 wrapped on the periphery of the oil casing 700 grinds the outer wall of the oil casing 700. The distance between the master roller 110 and the slave roller 120 can be adjusted according to the pipe diameter of the oil casing 700. The sandpaper is also flexible and can be adjusted.

It should be noted that, both ends of the grinding sand paper 130 are fixed on the frame, and when the oil casing 700 moves, the grinding sand paper 130 does not move relatively, so as to achieve the function of grinding the oil casing 170.

The spray mechanism 500 includes a high pressure spray chamber 510, a coating reservoir 520, and an annular spray head 530, the coating reservoir 520 being located outside the high pressure spray chamber 510, the annular spray head 530 being located inside the high pressure spray chamber 510 at an end adjacent to the inlet nozzle, the coating reservoir 520 being connected to the annular spray head 530.

It should be noted that, a plurality of nozzles (as shown in fig. 2) are arranged around the inner side of the annular nozzle 530, each nozzle is provided with a plurality of small holes, and in the spraying process, a plurality of spraying nozzles are simultaneously sprayed from different angles, and the whole pipe wall can be sprayed without a dead angle along with the movement of the oil casing 700. Compared with the spraying equipment which needs to rotate the oil pipe to spray in the market, the spraying equipment using the annular spray head 530 is more convenient and efficient.

The conveying assembly 200 is a roller conveyor, and two slidable stoppers 220 are provided on a roller shaft 210 of the roller conveyor, and the two stoppers 220 form a working groove 230. The working groove 230 formed by the two limiting blocks 220 is U-shaped, the position of the limiting blocks 220 can slide on the roller shaft 210, and the size of the working groove 230 can be adjusted through the sliding limiting blocks 220, so that the working groove is suitable for oil casings 700 with different pipe diameters.

It should be noted that, the roller conveyor used in this embodiment is a common device in the market, in this embodiment, a fixture block is disposed on the lower surface (i.e., the surface that the oil casing 700 cannot contact) of the roller shaft 210, a clamping groove is disposed on the limiting block 220, and by matching the fixture block with the clamping groove, the position of the limiting block 220, i.e., the distance between adjacent limiting blocks 220, can be adjusted, thereby adjusting the size of the working groove 230.

Before the device is used, the distance between the main roller 110 and the auxiliary roller 120 of the grinding assembly 100 is adjusted to a proper position according to the pipe diameter of an oil casing 700 to be operated, and the distance between the two limiting blocks 220 on the adjusting and conveying assembly 200 is adjusted to a proper position; and then the distances among the grinding assembly 100, the conveying assembly 200 and the spraying mechanism 500 are adjusted to proper positions according to the length of the oil casing 700.

One end of the oil casing 700 is placed into the grinding assembly 100, the main roller 110 rotates to convey the oil casing 700 to the spraying mechanism 500, and meanwhile, the outer wall of the oil casing 700 is wrapped by the peripheral grinding abrasive paper 130 to grind the surface to be rough, so that the coating is more firmly attached to the outer wall of the oil casing 700. The oil casing 700 is transferred to the first transfer part 300 through the matching movement of the main roller 110 and the auxiliary roller 120, the first transfer part 300 transfers the oil casing 700 to the high-pressure spraying chamber 510, the annular spraying head 530 sprays the outer wall of the oil casing 700, and the oil casing 700 after being sprayed is transferred to the second transfer part 400 through the outlet. The spraying of the entire oil casing 700 is completed until the other end of the oil casing 700 is also transferred to the second transfer part 400 through the outlet nozzle. The whole process does not need to turn over the petroleum casing 700 manually, the labor intensity of workers is reduced, and the working efficiency is high.

It should be noted that in other embodiments of the present invention, a plurality of grinding assemblies 100 may be arranged in parallel, corresponding to the number of the working tanks 230, and the corresponding annular spraying heads 530 in the high-pressure spraying chamber 510 also correspond to the number of the working tanks 230, so as to increase the working efficiency.

The petroleum casing spraying equipment provided by the invention comprises the grinding assembly 100, the conveying assembly 200 and the spraying mechanism 500, and the conveying assembly 200 is arranged without manually supporting and stabilizing the petroleum casing 700, so that the labor intensity of workers is greatly reduced, and the working efficiency is improved; the grinding component 100 grinds the outer wall of the oil casing 700 at the head end roughly, so that the coating is sprayed on the outer wall of the oil casing 700 more conveniently, the coating is more firmly attached to the outer wall, and the coating is saved.

Example 2

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of an oil casing spraying apparatus according to an embodiment of the present invention; FIG. 2 is a schematic view of a configuration of annular spray head 530; fig. 3 is a schematic structural diagram of the transfer assembly 200.

In this embodiment, the spray mechanism 500 also includes a voltage controller for adjusting the spray rate. The voltage regulator can control the spray velocity of annular spray head 530 and the droplet size of the coating material sprayed. For thick paint, the spraying speed can be adjusted slowly, so that the sprayed paint liquid drops are larger; for thinner coating, the spraying speed can be adjusted to ensure that the sprayed coating liquid drops are smaller, thereby ensuring the spraying effect, ensuring the coating thickness to be uniform and avoiding coating waste.

In an embodiment, the transfer assembly 200 is provided with a speed regulator that regulates the transfer rate. The transfer rate of the transfer assembly 200 may be adjusted faster or slower in coordination with the injection rate of the annular spray head 530.

Before use, a proper number of grinding assemblies 100, working tanks 230 and annular spray heads 530 are arranged; then, according to the pipe diameter of the oil casing 700 to be operated, the distance between the main roller 110 and the auxiliary roller 120 of the grinding assembly 100 is adjusted to a proper position, and the distance between the two limiting blocks 220 on the adjusting and conveying assembly 200 is adjusted to a proper position; and then the distance among the grinding assembly 100, the conveying assembly 200 and the spraying mechanism 500 is adjusted to a proper position through a pulley at the bottom according to the length of the oil casing 700.

In use, the head ends of the plurality of oil casings 700 are placed into the grinding assembly 100, the motor switch is turned on, the voltage controller is adjusted to the appropriate spraying rate, and the speed regulator is adjusted to the appropriate delivery rate. Many oil casings 700 can carry out the operation simultaneously, and every oil casing 700 loops through subassembly 100 of polishing, first transfer portion 300, the mouth of pipe that advances, annular shower nozzle 530, the mouth of pipe of going out and second transfer portion 400, has just accomplished the spraying of many pipes, very big improvement work efficiency.

The invention provides oil casing spraying equipment which comprises a grinding assembly 100, a conveying assembly 200 and a spraying mechanism 500, wherein the conveying assembly 200 is provided with a plurality of working grooves 230 in parallel. The conveying assembly 200 is arranged without manually supporting and stabilizing the oil casing 700, so that the labor intensity of workers is greatly reduced; the grinding component 100 grinds the outer wall of the oil casing 700 to be rough at the head end, so that the subsequent coating spraying is more facilitated, and the coating is more firmly attached to the outer wall of the oil casing 700; the plurality of working grooves 230 arranged on the conveying assembly 200 can convey a plurality of oil casings 700 to be sprayed at the same time, so that the working efficiency is remarkably improved.

Example 3

Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of an oil casing spraying apparatus according to an embodiment of the present invention; FIG. 2 is a schematic structural view of an annular showerhead 530; FIG. 3 is a schematic diagram of the structure of the transfer assembly 200; fig. 4 is a schematic structural view of the spray mechanism 500.

The petroleum casing spraying equipment provided by the embodiment is basically the same as the petroleum casing spraying equipment provided by the embodiment 2, and the main difference between the petroleum casing spraying equipment and the petroleum casing spraying equipment is as follows:

in this embodiment, the spray mechanism 500 further includes an air dryer 540, the air dryer 540 being located inside the high pressure spray chamber 510 near one end of the outlet nozzle. The air dryer 540 can rapidly dry the sprayed coating to accelerate the shaping of the coating.

It should be noted that during use, the oil casing 700 is conveyed into the high pressure spray chamber 510 by the conveyor assembly 200, the oil casing 700 passes through the annular spray head 530 and then through the air dryer 540, and the air dryer 540 can immediately dry the coating on the wall of the oil casing 700. Annular shower nozzle 530 can all spray oil casing 700 outer wall 360, can avoid after weathering the condition of scraping appearing because the coating is not dry in the in-process of follow-up conveying, once the completion avoids doing over again, has also improved work efficiency.

In this embodiment, the bottom of the high pressure spray chamber 510 is provided with a tray 550 for receiving the remaining coating and a coating purification device 560, the tray 550 is provided with a diversion opening, the diversion opening is connected with the coating purification device 560, and the purification device is further connected with the coating storage tank 520.

It should be noted that, the whole spraying process is completed in the high-pressure spraying chamber 510, the paint mist generated during spraying can not be diffused to the outside, the pollution to the environment is avoided, and the paint mist can be collected in the tray 550 at the bottom of the high-pressure spraying chamber 510, the collected paint enters the paint purifying device 560 through the diversion port, the collected paint is purified to the usable degree by the paint purifying device 560, and then the purified paint is sucked into the paint storage tank 520 and can be reused, which not only facilitates the collection of the redundant paint mist, improves the utilization rate of the paint, but also reduces the pollution to the working environment, and improves the practicability.

In summary, the oil casing spraying apparatus provided by the present invention comprises a grinding assembly 100, a conveying assembly 200 and a spraying mechanism 500, wherein the conveying assembly 200 is provided with a plurality of working grooves 230 in parallel. The conveying assembly 200 is arranged without manually supporting and stabilizing the petroleum casing 700, so that the labor intensity of workers is reduced by mechanical operation; the grinding component 100 grinds the outer wall of the oil casing 700 to be rough at the head end, so that the subsequent coating spraying is more facilitated, and the coating is more firmly attached to the outer wall of the oil casing 700; the plurality of working grooves 230 arranged on the conveying assembly 200 can convey a plurality of oil casings 700 at the same time and spray a plurality of oil casings 700 at the same time, so that the time is saved and the working efficiency is improved.

Example 4

On the basis of embodiment 3, the present embodiment provides a petroleum casing spraying process, including the following steps:

(1) polishing: the surface of the petroleum casing pipe 700 is treated by the polishing component 100 to remove oxygen skin and rust on the surface of a workpiece, form certain roughness and increase the adhesive force between the coating and the pipe wall, the surface cleanliness of the pipe reaches Sa1.5 grade, and the degree of anchoring is 30 mu m;

(2) pipe feeding: conveying the oil casing 700 into the high pressure spraying chamber 510 with the first conveying part 300, wherein the rotating speed of the roller shaft 210 is 120 r/min;

(3) spraying: the coating is pressurized to 40Mpa in the high-pressure spraying chamber 510 by a high-pressure pump, the coating is delivered to the annular nozzle 530 through a paint delivery pipeline, the pressure is suddenly released, the coating is uniformly atomized, and the coating thickness is as follows: 80 μm;

(4) air drying and curing: after the spraying, the petroleum casing 700 is conveyed to the position of the air dryer 540, and the surface coating is cured by hot air, wherein the air drying temperature is controlled at 120 ℃.

(5) Discharging a pipe: and (3) conveying the oil casing 700 out of the high-pressure spraying chamber 510 by using the second conveying part 400, wherein the rotating speed of the roller shaft 210 is 120r/min, and the spraying process is finished.

According to the petroleum casing spraying process provided by the invention, the process of polishing, spraying and air drying is adopted, the rough surface after polishing is more favorable for the coating to be attached to the outer wall of the petroleum casing 700, the coating is immediately dried and cured after spraying, the condition that the coating is scratched because the coating is not dried in the subsequent conveying process can be avoided, the condition of coating leakage points can not occur, and the working efficiency is improved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an oil casing spraying equipment, characterized in that, includes polishing subassembly, transfer module and spraying mechanism, the transfer module parallel is equipped with a plurality of work grooves that are used for the bushing, transfer module includes first transfer portion, second transfer portion, first transfer portion is located spraying mechanism's the mouth of pipe that enters, the second transfer portion is located spraying mechanism's the mouth of pipe that goes out, polishing subassembly is located one side of first transfer portion.

2. The oil casing spraying apparatus according to claim 1, wherein the spraying mechanism includes a high-pressure spraying chamber, a paint storage tank and an annular nozzle, the paint storage tank is located outside the high-pressure spraying chamber, the annular nozzle is located inside the high-pressure spraying chamber, and the paint storage tank is connected to the annular nozzle.

3. The oil casing spraying equipment according to claim 2, wherein the number of the annular spray heads corresponds to the number of the working grooves one to one.

4. The oil casing spraying apparatus of claim 3, wherein the spraying mechanism further comprises a voltage controller for adjusting the spraying rate.

5. The oil casing spraying apparatus of claim 4, wherein the spraying mechanism further comprises an air dryer located inside the high pressure spraying chamber near one end of the outlet nozzle.

6. The oil casing spraying equipment of claim 5, wherein the grinding assembly comprises a main roller, a slave roller and grinding abrasive paper wrapping the periphery of the oil casing, the main roller and the slave roller are oppositely arranged, the main roller and the slave roller are abutted to an oil pipeline, and the grinding abrasive paper is positioned between the main roller and the spraying mechanism.

7. The oil casing spraying apparatus of claim 6 wherein said conveyor assembly is a roller conveyor, said roller conveyor including a drive means, a support frame and a roller shaft, said roller shaft having a plurality of slidable stops, adjacent said stops forming one of said working channels.

8. The oil casing spraying equipment according to claim 7, wherein the bottom of the high-pressure spraying chamber is provided with a coating material purifying device and a tray for receiving residual coating material, the tray is provided with a diversion port, the diversion port is connected with the coating material purifying device, and the coating material purifying device is connected with the coating material storage tank.

9. The oil casing spraying equipment according to claim 8, wherein the grinding assembly, the conveying assembly and the bottom of the spraying mechanism are provided with rollers.

10. An oil casing spraying process based on the oil casing spraying equipment as claimed in claim 9, characterized by comprising the steps of:

(3) spraying: pressurizing the coating to 30-50 Mpa by a high-pressure pump, then spraying the coating on the surface of the petroleum casing pipe by the coating to the annular spray head through a paint conveying pipeline, wherein the thickness of the coating is as follows: 50-150 μm;

(4) air drying and curing: after the spraying is finished, conveying the petroleum casing pipe to the position of the air dryer, and curing the surface coating by hot air, wherein the air drying temperature is 80-150 ℃;

(5) discharging a pipe: and conveying the oil casing out of the high-pressure spraying chamber by using the second conveying part, wherein the rotating speed of the roller shaft of the second conveying part is 100-300 r/min, and spraying is finished.