Pipeline inner wall spraying equipment assembly and method

Abstract

The invention discloses a pipeline inner wall spraying equipment assembly and method. The pipeline inner wall spraying equipment assembly comprises a spraying machine, the spraying machine is provided with a nozzle, the discharging direction of the nozzle is perpendicular to the central axis of a to-be-sprayed pipeline, and the nozzle is driven to be close to or away from the inner wall of the pipeline and further driven to rotate around the central axis of the pipeline; the spraying device further comprises a walking mechanism, the spraying machine is arranged on the walking mechanism, and the spraying machine is controlled by the walking mechanism to move along a set route. The device further comprises a nozzle adjusting mechanism, and the nozzle adjusting mechanism is arranged on the walking mechanism and used for adjusting the rotating axis of the nozzle to coincide with the central axis of the pipeline. And at least one of the problems existing in current pipeline spraying can be solved, and effective spraying of the inner wall coating of the pipeline is completed.

Description

Technical Field

[0001] The invention relates to the field of pipeline spraying, and in particular to a pipeline inner wall spraying equipment assembly and method. Background Art

[0002] There are four main problems with the inner wall coating of such pipes on the market today.

[0003] The first problem: Most of the pipe inner wall spraying equipment assemblies are semi-automatic spraying methods, using manual traction sprayers to spray the inner wall. This method sprays uneven paint films, and improper operation will result in irregular superposition of paint films.

[0004] The second problem: the center of the sprayer cannot be accurately docked with the center of the pipe. This type of problem is mainly caused by problems in the operation and use of the equipment. This type of problem will cause the thickness of the film coated on the inner wall of the pipe to be uneven during the spraying process.

[0005] The third problem: There are many automatic spraying equipment on the market, but they are mainly for the inner wall spraying robots and external track inner wall spraying equipment of wind turbine towers above 3000mm. These two types of spraying equipment are large in size and heavy in total. The external track inner wall spraying equipment needs to occupy an area more than twice the length of the workpiece, which makes the self-crawling robot unsuitable for small pipes, and the pipe nozzle spraying device is complicated and difficult to move. The spraying equipment that can adapt to small pipes needs to occupy a large area, which directly leads to unnecessary production costs;

[0006] The fourth question: The nature of coating is different from that of other industries. The atomization of coatings often produces dust, which means that ordinary electrical appliances cannot be directly mounted on spraying equipment. Explosion-proof or explosion-proof treatment must be carried out to prevent corrosion of the inner wall of the pipeline.

[0007] Therefore, a pipeline inner wall spraying equipment assembly and method are needed, which can solve at least one of the above problems and complete the effective spraying of the pipeline inner wall coating. Summary of the invention

[0008] In view of this, the purpose of the present invention is to overcome the defects in the prior art and provide a pipeline inner wall spraying equipment assembly and method, which can at least solve one of the current problems existing in pipeline spraying and complete the effective spraying of the pipeline inner wall coating.

[0009] The pipeline inner wall spraying equipment assembly of the present invention comprises a sprayer, the sprayer having a nozzle, the discharge direction of the nozzle being perpendicular to the central axis of the pipeline to be sprayed, the nozzle being driven to approach or move away from the inner wall of the pipeline, and the nozzle being driven to rotate around the central axis of the pipeline;

[0010] It also includes a walking mechanism, the spraying machine is arranged on the walking mechanism, and the spraying machine is controlled by the walking mechanism to move along a predetermined route;

[0011] It also includes a nozzle adjustment mechanism, which is arranged on the walking mechanism and is used to adjust the rotation axis of the nozzle to coincide with the central axis of the pipeline.

[0012] Furthermore, it also includes an explosion-proof mechanism, the walking mechanism has an explosion-proof box, the power source of the sprayer is arranged in the explosion-proof box, the explosion-proof mechanism includes an air supply device and an air supply duct, the head end of the air supply duct is connected to the air outlet end of the air supply device, the end of the air supply duct is connected to the explosion-proof box, and the explosion-proof box has an air outlet.

[0013] Furthermore, it also includes a wire harness limiting mechanism, which has a preset number of wire harness limiting parts, and the paint tube of the sprayer is retracted or unfolded through the wire harness limiting parts.

[0014] Furthermore, the walking mechanism includes a supporting frame and a walking wheel I mounted on the supporting frame, and the walking wheel I is driven to displace the supporting frame;

[0015] The walking mechanism also includes a lifting platform and a lifting assembly for raising or lowering the lifting platform;

[0016] The lifting platform is arranged on the front side of the middle part of the supporting frame through a lifting assembly, and the spraying machine is arranged on the top of the lifting platform.

[0017] Furthermore, the harness limiting mechanism includes a winding drum, a drum frame connecting the winding drum to the support frame, and a driving source driving the winding drum to rotate around its own axis, and the winding drum is arranged on the rear side of the lifting assembly.

[0018] Furthermore, the nozzle adjustment mechanism is arranged between the lifting platform and the shell of the sprayer, and the nozzle adjustment mechanism has a running wheel II, and the sprayer travels on the lifting platform via the running wheel II.

[0019] Furthermore, the nozzles are a plurality of nozzles uniformly distributed circumferentially around the central axis of the pipeline.

[0020] The present invention also discloses a pipeline inner wall spraying method based on the pipeline inner wall spraying equipment assembly, comprising the following steps:

[0021] S1. Drive the walking mechanism so that the nozzle adjustment mechanism engages with the end of the pipe to be sprayed, so that the walking mechanism is positioned at a preset position;

[0022] S2. Drive the nozzle adjustment mechanism to allow the sprayer to enter the pipe to be sprayed;

[0023] S3. driving the nozzle adjustment mechanism so that the rotation center of the nozzle coincides with the center of the pipe to be sprayed;

[0024] S4. Make the distance between the nozzle and the inner wall of the pipe to be sprayed a preset distance;

[0025] S5. Drive the nozzle adjustment mechanism forward so that the nozzle is located at the head end of the pipeline;

[0026] S6. Open the nozzle, move the nozzle adjustment mechanism back, and return the nozzle to the end of the pipe;

[0027] S7. After the inner wall of the pipeline is sprayed, the inner wall spraying equipment assembly of the pipeline is recovered.

[0028] The beneficial effects of the present invention are as follows: a pipeline inner wall spraying equipment assembly and method disclosed in the present invention, wherein the discharge direction of the nozzle is perpendicular to the central axis of the pipeline to be sprayed, so as to be more conducive to monitoring the distance between the nozzle discharge port and the inner wall of the pipeline, and improve the accuracy of controlling the thickness of the spray film, and the nozzle is driven to approach or move away from the inner wall of the pipeline. This adjustment method is more adaptable to coatings of different viscosities and coatings of different spray thicknesses, the paint film is more uniform, and the equipment is smaller. The sprayer also has the ability to monitor the distance between the nozzle discharge port and the inner wall of the pipeline to be sprayed, as well as a control system for setting the spray distance corresponding to the spray thickness, etc., which will not be repeated here; the nozzle is also driven to rotate around the central axis of the pipeline, and the length of the rotating nozzle on the sprayer can be radially expanded or retracted according to the size of the pipeline to adjust the optimal spray distance of the nozzle, so that the paint sprayed by the sprayer can evenly cover the circumference of the pipeline. The rotation rate of the nozzle is controlled within a set range and is also controlled by the control system of the sprayer, which will not be elaborated here; of course, the sprayer should also include a power source, a feeding system, and a monitoring system to constitute a fully functional sprayer, which can meet the requirements of continuous and stable spraying of a paint film of a specified thickness, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the walking mechanism of the present invention;

[0032] Figure 3 It is a structural schematic diagram of the nozzle adjustment mechanism of the present invention;

[0033] Figure 4 It is a structural schematic diagram of the wire harness limiting mechanism of the present invention;

[0034] Figure 5 It is a partial structural schematic diagram of the spraying machine of the present invention;

[0035] Figure 6 For the present invention Figure 2 A schematic diagram of a top view structure;

[0036] Figure 7 For the present invention Figure 2 A side view schematic diagram of the structure;

[0037] Figure 8 For the present invention Figure 3 A schematic diagram of a top view structure;

[0038] Fig. 9 For the present invention Figure 3 A side view schematic diagram of the structure;

[0039] Fig.10 For the present invention Figure 4 A schematic diagram of a top view structure;

[0040] Fig.11 For the present invention Figure 4 Schematic diagram of the side structure. DETAILED DESCRIPTION

[0041] Figure 1 It is a structural schematic diagram of the present invention. As shown in the figure, the pipeline inner wall spraying equipment assembly in this embodiment includes a sprayer 001, and the sprayer 001 has a nozzle 1. The discharge direction of the nozzle 1 is perpendicular to the central axis of the pipeline to be sprayed, so as to be more conducive to monitoring the distance between the discharge port of the nozzle 1 and the inner wall of the pipeline, and improve the accuracy of controlling the thickness of the sprayed film. The nozzle 1 is driven to approach or move away from the inner wall of the pipeline. This adjustment method is more adaptable to coatings of different viscosities and coatings of different spraying thicknesses. The paint film is more uniform and the equipment is smaller. The sprayer 001 also has the ability to monitor the distance between the discharge port of the nozzle 1 and the inner wall of the pipeline to be sprayed, as well as a control system for setting the spraying distance corresponding to the spraying thickness, etc., which will not be repeated here; the nozzle 1 is also driven to rotate around the central axis of the pipeline, and the length of the rotating nozzle 1 on the sprayer can be radially expanded or retracted according to the size of the pipeline to adjust the optimal spraying distance of the nozzle 1, so that the paint sprayed by the sprayer can evenly cover the circumference of the pipeline. The rotation rate of the nozzle 1 is controlled within a set range and is also controlled by the control system of the sprayer 001, which will not be elaborated here; of course, the sprayer 001 should also include a power source, a feeding system, and a monitoring system to constitute a fully functional sprayer 001, which can meet the requirements of continuous and stable spraying of a paint film of a specified thickness, which will not be elaborated here.

[0042] In this embodiment, a walking mechanism is also included, and the sprayer 001 is arranged on the walking mechanism. The sprayer 001 is controlled to move along a predetermined route through the walking mechanism; the arrangement of the walking mechanism can construct a supporting basic skeleton, can integrate various parts of this solution, can reduce the floor space, and the walking mechanism can drive the overall spraying equipment to move to a specified position; the maneuverability is improved, and the structure is more compact, the cost is lower, and the versatility and scalability are stronger; this solution utilizes the current hydraulic lifting technology in the walking mechanism, which facilitates the sprayer 001 to be driven into pipes at different placement heights, and provides a pipe nozzle spraying platform for the sprayer 001.

[0043] More specifically, the walking mechanism includes a support frame 2 and walking wheels Ⅰ4 mounted on the support frame 2, and the support frame 2 is also provided with handrails 3, which are conducive to adjusting the displacement and positioning of the walking mechanism; the walking wheels Ⅰ4 are driven to displace the support frame 2; the walking wheels Ⅰ4 also have the function of locking at a specified position, making the positioning more reliable; the walking mechanism also includes a lifting platform 5 and a lifting component 6 for raising or lowering the lifting platform 5; the lifting component 6 is selected from any scissor-type hydraulic lift of the current technology, and this scheme utilizes the current hydraulic lifting technology in the walking mechanism , it is convenient for the sprayer 001 to be driven into the pipes at different placement heights, and a pipe mouth spraying platform is provided for the sprayer 001, wherein the lifting platform 5 also has a guard plate 7 for protecting the sprayer 001, and holes for feed line pipes and other pipelines are reserved on the rear guard plate 7. The lifting platform 5 is arranged on the middle front side of the length direction of the support frame 2 through the lifting component 6, and the sprayer 001 is arranged on the top of the lifting platform 5, so that the sprayer 001 arranged on the lifting platform 5 is closer to the pipe to be sprayed, and the centering of the rotation axis of the nozzle 1 is more accurate, which is conducive to ensuring the quality of the coating on the inner wall of the pipe.

[0044] In this embodiment, it also includes a nozzle adjustment mechanism, which is arranged on the walking mechanism, and is used to adjust the rotation axis of the nozzle 1 to coincide with the central axis of the pipeline; the nozzle adjustment mechanism is arranged between the lifting platform 5 and the shell of the sprayer 001, and the nozzle adjustment mechanism has walking wheels II8, and the sprayer 001 walks on the lifting platform 5 through the walking wheels II8. As shown in the figure, the nozzle adjustment mechanism of this scheme also includes a hydraulic lifting scissor machine 9 for lifting the sprayer, wherein the sprayer is arranged at the front end of the scissor machine 9, and the nozzle adjustment mechanism of this scheme has the function of walking and lifting the nozzle 1 of the sprayer 001, which can further improve the centering effect of the rotation center of the nozzle 1;

[0045] The control box 10 of the spraying machine 001 in this solution is centrally controlled by PLC. The control box 10 is set on the platform supported by the walking wheel II 8 and is located in the middle of the aforementioned scissor lift machine 9. The servo drive is controlled by PROFINET bus, and has the characteristics of high speed, high stability, high precision, etc. The system will provide real-time feedback on the operating status of each part, such as spray gun status, axis position, axis speed, alarm information, etc., and can monitor and modify control parameters on the human-machine interface, which is simple to operate; in addition, it is also equipped with a remote industrial remote control, which can remotely control the system, which is easy to use and can be achieved using current technology, so I will not go into details here.

[0046] In this embodiment, an explosion-proof mechanism is also included. The walking mechanism has an explosion-proof box 11. The power source of the sprayer 001 is set in the explosion-proof box 11. Of course, other dangerous motors can also be set in the explosion-proof box 11 to play a safety protection function. In this scheme, the explosion-proof box 11 is set at the bottom of the control box 10 of the sprayer 001, and the walking wheels II8 are arranged on both sides of the explosion-proof box 11. The explosion-proof mechanism includes an air supply device and an air supply duct. The head end of the air supply duct is connected to the air outlet end of the air supply device, and the end of the air supply duct is connected to the explosion-proof box 11. The explosion-proof box 11 has an air outlet. By inflating the inside, the compressed air output is always maintained in the explosion-proof box 11, thereby preventing the entry of dust, playing an explosion-proof function, and safety can be guaranteed; there is also an implementation method in which the sprayer 001 is equipped with a right-angle reducer and a pneumatic motor. Because of the explosion-proof characteristics of the pneumatic motor itself, the explosion-proof device can be omitted, which will not be repeated here.

[0047] In this embodiment, it also includes a harness limiting mechanism, which has a preset number of harness limiting parts, through which the paint tube of the sprayer 001 is retracted or unfolded; the setting of the harness limiting mechanism is mainly used to match the wire feeding rate and the walking rate when the paint machine is shifted into the pipeline, and the bundle tube limiting mechanism can accommodate the pipeline length and can be adjusted according to demand. The main function of the harness limiting mechanism is to organize the compressed air pipes, paint delivery pipes, motor controls, power lines, etc. carried on the trolley, and collect them on the circular bundle tube rack to prevent the lines from affecting the movement of the trolley and the placement of on-site equipment, so as to facilitate the overall movement of the trolley. More specifically, the wire harness limiting mechanism includes a wire reel 12, a reel frame 13 connecting the wire reel 12 to the support frame 2, and a driving source for driving the wire reel 12 to rotate around its own axis. The wire reel 12 is arranged on the rear side of the lifting assembly 6. The overall structure is more compact and the space utilization rate is extremely high. In particular, the sprayer 001 with a self-propelled control of the detachable walking mechanism can reliably and effectively spray the inner wall of the pipeline, reducing the construction site, and has stronger adaptability and versatility, and the cost of construction and use can be controlled within a lower range. The wire harness limiting mechanism has the ability to actively reel in and release wires, and can layout and select the fixation of the wire harness and the retraction and expansion of the wire harness according to actual use or design conditions. This can be achieved through the current structure of the wire reel 12, which will not be repeated here.

[0048] In this embodiment, the nozzles 1 are a plurality of nozzles 1 uniformly distributed circumferentially around the central axis of the pipeline, thereby improving the spraying efficiency and spraying uniformity and improving the spraying quality of the inner wall of the pipeline.

[0049] The present invention also discloses a pipeline inner wall spraying method based on the pipeline inner wall spraying equipment assembly, comprising the following steps:

[0050] S1. Drive the travel mechanism so that the nozzle adjustment mechanism engages with the end of the pipe to be sprayed, and positions the travel mechanism at a preset position; in this state, the sprayer 001 is pre-positioned, and the sprayer 001 is at the end position of the pipe so that the rotation center of the nozzle 1 roughly coincides with the central axis of the pipe to be sprayed;

[0051] S2. Driving the nozzle adjustment mechanism to allow the sprayer 001 to enter the pipe to be sprayed;

[0052] S3. Drive the nozzle adjustment mechanism so that the rotation center of nozzle 1 coincides with the center of the pipe to be sprayed; this is to fine-tune the axis to ensure that the parameters are reliable, so that the sprayer 001 can spray the inner wall of the pipe according to the established parameters;

[0053] S4. The distance between the nozzle 1 and the inner wall of the pipe to be sprayed is a preset distance; the preset distance is determined by the parameters of the control system and adjusted to actual needs, which will not be repeated here;

[0054] S5. Drive the nozzle adjustment mechanism forward so that nozzle 1 is located at the first end of the pipe;

[0055] S6. Open nozzle 1, move the nozzle adjustment mechanism backward, and return nozzle 1 to the end of the pipeline;

[0056] S7. After the inner wall of the pipeline is sprayed, the inner wall spraying equipment assembly of the pipeline is recovered.

[0057] More specifically, the present solution can be applied to high, medium and low viscosity paints, and the sprayer 001 can be driven to crawl back and forth in the pipeline; when the workpiece is placed on site, by pushing the sprayer 001 to the pipeline mouth, fixing the walking mechanism at the bottom, raising the external lifting platform 5 to the outer diameter of the pipe and overlapping the pipe mouth, then inputting the pipe diameter size and length, and the film thickness required for spraying into the control cabinet, turning on the start button, the sprayer 001 starts to move, the harness limiting mechanism rotates forward to start releasing the wire, and the sprayer 001 stops when it moves to the other end of the pipeline, the harness limiting mechanism stops rotating, the control cabinet starts to spray, the inner wall sprayer 001 starts to rotate, and the spray gun opens after the speed stabilizes to form a circular mist width, the sprayer 001 starts to retreat, and at the same time the harness limiting mechanism starts to reverse and rotate to retract the wire; until the sprayer 001 exits the pipeline and returns to the starting position of the external lifting platform 5, the spraying stops.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A pipeline inner wall spraying equipment assembly, characterized in that: The sprayer comprises a nozzle, the discharge direction of the nozzle is perpendicular to the central axis of the pipe to be sprayed, the nozzle is driven to approach or move away from the inner wall of the pipe, and the nozzle is also driven to rotate around the central axis of the pipe; It also includes a walking mechanism, the spraying machine is arranged on the walking mechanism, and the spraying machine is controlled by the walking mechanism to move along a predetermined route; It also includes a nozzle adjustment mechanism, which is arranged on the walking mechanism and is used to adjust the rotation axis of the nozzle to coincide with the central axis of the pipeline.

2. The pipeline inner wall spraying equipment assembly according to claim 1 is characterized in that: It also includes an explosion-proof mechanism, the walking mechanism has an explosion-proof box, the power source of the sprayer is arranged in the explosion-proof box, the explosion-proof mechanism includes an air supply device and an air supply duct, the head end of the air supply duct is connected to the air outlet end of the air supply device, the end of the air supply duct is connected to the explosion-proof box, and the explosion-proof box has an air outlet.

3. The pipeline inner wall spraying equipment assembly according to claim 2 is characterized in that: It also includes a wire harness limiting mechanism, which has a preset number of wire harness limiting parts, and the paint tube of the sprayer is retracted or unfolded through the wire harness limiting parts.

4. The pipeline inner wall spraying equipment assembly according to claim 3 is characterized in that: The walking mechanism includes a supporting frame and a walking wheel I mounted on the supporting frame, and the walking wheel I is driven to displace the supporting frame; The walking mechanism also includes a lifting platform and a lifting assembly for raising or lowering the lifting platform; The lifting platform is arranged on the front side of the middle part of the supporting frame through a lifting assembly, and the spraying machine is arranged on the top of the lifting platform.

5. The pipeline inner wall spraying equipment assembly according to claim 4 is characterized in that: The harness limiting mechanism comprises a winding drum, a drum frame connecting the winding drum to a supporting frame, and a driving source driving the winding drum to rotate around its own axis. The winding drum is arranged at the rear side of the lifting assembly.

6. The pipeline inner wall spraying equipment assembly according to claim 4 is characterized in that: The nozzle adjustment mechanism is arranged between the lifting platform and the shell of the spraying machine. The nozzle adjustment mechanism has a running wheel II, and the spraying machine runs on the lifting platform via the running wheel II.

7. The pipeline inner wall spraying equipment assembly according to claim 1 is characterized in that: The nozzles are a plurality of nozzles uniformly distributed circumferentially around the central axis of the pipeline.

8. A method for spraying the inner wall of a pipeline based on the pipeline inner wall spraying equipment assembly according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Drive the walking mechanism so that the nozzle adjustment mechanism engages with the end of the pipe to be sprayed, so that the walking mechanism is positioned at a preset position; S2. Drive the nozzle adjustment mechanism to allow the sprayer to enter the pipe to be sprayed; S3. driving the nozzle adjustment mechanism so that the rotation center of the nozzle coincides with the center of the pipe to be sprayed; S4. Make the distance between the nozzle and the inner wall of the pipe to be sprayed a preset distance; S5. Drive the nozzle adjustment mechanism forward so that the nozzle is located at the head end of the pipeline; S6. Open the nozzle, move the nozzle adjustment mechanism back, and return the nozzle to the end of the pipe; S7. After the inner wall of the pipeline is sprayed, the inner wall spraying equipment assembly of the pipeline is recovered.

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