An apparatus for automatic spray application of thermal insulation to pipes

Abstract

The utility model provides a kind of device for automatic spraying heat preservation coating for pipeline, including spraying chamber, pipeline fixed unit, spraying unit, drying unit, the gas purification unit of extraction purification spraying chamber;Pipeline fixed unit includes two insertion pipeline both ends inside support pipeline air inflation shaft, with the tail end connection of one air inflation shaft electric telescopic handle, the gas supply device for air inflation shaft;Spraying unit includes annular spraying pipe, spraying movement drive assembly for driving annular spraying pipe along pipeline moves and spraying liquid supply system for supplying heat preservation coating;Annular spraying pipe inside is distributed multiple spraying nozzles along circumference;Drying unit includes annular drying pipe, drying movement drive assembly for driving annular drying pipe along pipeline moves and drying gas supply system for supplying drying gas;Annular drying pipe inside is distributed multiple drying gas spouts along circumference.The device described in the utility model has good spraying uniformity, convenient and stable pipeline fixing mode, and integrates spraying, drying and purification.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline surface treatment technology, and in particular relates to an automatic spraying device for thermal insulation coating of pipelines. Background Technology

[0002] In the petroleum, chemical, and municipal heating industries, thermal insulation coatings are typically applied to the outer walls of pipelines to reduce heat loss during transport or prevent condensation of low-temperature fluids. Traditional pipeline coating methods are mostly manual, resulting in poor coating uniformity, low production efficiency, harsh working environments, and direct emissions of harmful gases and paint mist that pollute the environment. While some automated coating equipment exists, it often suffers from poor coating uniformity, complex pipeline fixing methods, and limited functionality. Furthermore, it requires subsequent transport to a drying chamber for drying, leading to poor coordination between the coating and drying processes and inconvenient operation. Utility Model Content

[0003] In view of this, in order to solve the above-mentioned technical problems, this utility model proposes an automatic spraying device for thermal insulation coating of pipelines with good spray uniformity, convenient and stable pipeline fixing method, and compact structure that integrates spraying, drying and purification.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] An apparatus for automatically spraying thermal insulation coatings onto pipes, comprising:

[0006] The spraying chamber is a box-shaped structure with a door on the front and a support base at the bottom.

[0007] The pipe fixing unit includes two air shafts located in the spraying chamber, which can be inserted into the inner sides of the pipes to be sprayed and laterally suspended to support the pipes; an electric telescopic rod horizontally installed on the side wall of the spraying chamber with its telescopic end connected to the end of one of the air shafts; and an air supply device. The air shafts are equipped with an exhaust valve and an intake valve connected to the air supply device. By supplying air into the air shafts, they expand and thus tightly abut against the inner wall of the pipes to fix the pipes. The air shafts are inflated and deflated through the intake and exhaust valves, which facilitates the quick installation and disassembly of the pipes.

[0008] The spraying unit includes an annular spraying pipe that can be sleeved on the outside of a pipe, a spraying moving drive assembly that drives the annular spraying pipe to move along the length of the pipe, and a spraying liquid supply system that supplies thermal insulation coating to the annular spraying pipe. Multiple spraying nozzles are evenly distributed circumferentially on the inner side of the annular spraying pipe, facing the outer wall of the pipe. During the process of the spraying moving drive assembly driving the annular spraying pipe to move along the length of the pipe, the spraying nozzles spray out thermal insulation coating, which is evenly sprayed onto the pipe to form a thermal insulation coating.

[0009] The drying unit includes an annular drying tube that can be sleeved on the outside of a pipe, a drying movement drive assembly that drives the annular drying tube to move along the length of the pipe, and a drying gas supply system that supplies drying gas to the annular drying tube. Multiple drying gas nozzles are evenly distributed circumferentially on the inner side of the annular drying tube, facing the outer wall of the pipe. During the movement of the annular drying tube along the length of the pipe by the drying movement drive assembly, the drying gas nozzles spray drying gas onto the surface of the pipe, causing the insulation coating to dry rapidly.

[0010] A purification unit, the air inlet of which is connected to the inner cavity of the spraying chamber, is used to extract and purify the gas inside the spraying chamber.

[0011] Furthermore, the box door is equipped with an observation window.

[0012] Furthermore, the bottom of the inner cavity of the spraying chamber is provided with a collection trough for collecting dripping paint.

[0013] Furthermore, the air supply device is located at the bottom of the spraying chamber, and the air outlet is connected to an inflation pipe. The air outlet of the inflation pipe extends into the inner cavity of the spraying chamber and is detachably connected to the air inlet valve on the air expansion shaft through an inflation hose. The inflation hose and the air inlet valve are also detachably connected, and the inflation hose can be removed after inflation.

[0014] Furthermore, the pipe fixing unit also includes a drive motor, which is installed on the outer wall of the spraying chamber and connected to the end of another air shaft via a shaft. The drive motor drives the other air shaft to rotate. One of the air shafts connected to the electric telescopic rod is connected to the telescopic end of the electric telescopic rod via a rotary bearing. The drive motor drives the other air shaft to rotate, causing the fixed pipe and the other air shaft to rotate slowly. In coordination with the movement of the annular spraying pipe, the outer wall of the pipe is uniformly and continuously sprayed in a spiral motion.

[0015] Furthermore, the spraying moving drive assembly and the drying moving drive assembly are spatially offset; each of the spraying moving drive assembly and the drying moving drive assembly includes a guide rail transversely arranged in the spraying chamber, a lead screw installed in the guide rail, a second drive motor installed outside the spraying chamber and driving the lead screw to rotate, a lead screw nut sleeved on the lead screw, and a slider connected to the lead screw nut and slidable along the guide rail; the annular spraying pipe and the annular drying pipe are respectively connected to their respective corresponding sliders; the second drive motor drives the lead screw to rotate, thereby causing the lead screw nut and the slider to move along the guide rail, and thus driving the corresponding annular spraying pipe or the annular drying pipe to move along the length of the pipe.

[0016] Furthermore, the spraying liquid supply system includes a spraying liquid tank, a liquid supply pump connected to the outlet end of the spraying liquid tank, and a liquid supply pipe connected to the outlet end of the liquid supply pump; the annular spraying pipe is provided with an inlet pipe; the inlet end of the inlet pipe is connected to the liquid supply pipe through a retractable elastic liquid supply hose.

[0017] Furthermore, the drying gas supply system includes a fan, a heater for heating the gas supplied by the fan, and a drying gas pipeline connected to the outlet of the heater; the annular drying pipe is provided with a drying gas inlet pipe; the inlet end of the drying gas inlet pipe is connected to the drying gas pipeline through a retractable elastic drying gas hose.

[0018] Furthermore, the purification unit includes an exhaust fan, a purification filter connected to the inlet end of the exhaust fan, and an exhaust pipe connected to the inlet end of the purification filter; the inlet end of the exhaust pipe extends into the inner cavity of the spraying chamber; the purifier is provided with a filter screen layer and an activated carbon adsorption layer.

[0019] Compared with existing technologies, the automatic spraying device for thermal insulation coating of pipelines described in this utility model has the following advantages:

[0020] The automatic spraying device for thermal insulation coating of pipelines described in this utility model adopts an air expansion shaft fixing method, which is quick and convenient to install and disassemble, and has good centering. It is suitable for pipelines of different diameters (within a certain range) and is firmly fixed. It adopts a moving spraying method with an annular spraying pipe sleeved on the outside of the pipeline, which has good spraying uniformity and high efficiency. It adopts a moving air jet drying method with an annular drying pipe sleeved on the outside of the pipeline, which is highly targeted and has high drying efficiency. A purification unit is set up to treat harmful gases and paint mist before exhausting them, improving the working environment. The spraying, drying and purification functions are integrated into the spraying chamber, which has a compact layout, small footprint and smooth process. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0022] Figure 1 This is a schematic diagram of the internal structure of the automatic spraying and insulation coating device for pipelines described in Embodiment 1 of this utility model;

[0023] Figure 2 This is a schematic diagram of the external structure of the automatic spraying and insulation coating device for pipelines described in Embodiment 1 of this utility model;

[0024] Figure 3This is a top view showing the layout of the pipe fixing unit and the drying unit in the spraying chamber according to Embodiment 1 of this utility model.

[0025] Figure 4 This is a schematic diagram of the internal structure of the automatic spraying and heat insulation coating device for pipelines described in Embodiment 1 of this utility model (drying unit not shown);

[0026] Figure 5 This is a schematic diagram of the structure of the annular spray pipe described in Embodiment 1 of this utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the annular drying tube described in Embodiment 1 of this utility model;

[0028] Figure 7 This is a schematic diagram of the internal structure of the automatic spraying thermal insulation coating device for pipelines described in Embodiment 2 of this utility model;

[0029] Figure 8 This is a schematic diagram of the structure of the automatic spraying thermal insulation coating device for pipelines after fixing the pipeline as described in Embodiment 2 of this utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1-Spraying chamber, 11-Box door, 12-Observation window;

[0032] 2-Pipe fixing unit, 21-Air shaft, 22-Electric telescopic rod, 23-Exhaust valve, 24-Inlet valve, 25-Air supply device, 26-Inflation pipe, 27-Inflation hose, 28-Drive motor 1;

[0033] 3-Spraying unit, 31-Annular spraying pipe, 32-Spraying nozzle, 33-Spraying liquid tank, 34-Liquid supply pump, 35-Liquid supply pipe, 36-Liquid inlet pipe, 37-Flexible liquid supply hose;

[0034] 4-Drying unit, 41-Annular drying pipe, 42-Drying gas nozzle, 43-Fan, 44-Heater, 45-Drying gas pipeline, 46-Drying gas inlet pipe, 47-Drying gas hose;

[0035] 5-Purification unit, 51-Exhaust fan, 52-Purification filter, 53-Exhaust duct;

[0036] 6-Support base;

[0037] 7-Collection slot;

[0038] 8-Pipeline;

[0039] 91-Guide rail, 92-Lead screw, 93-Drive motor II, 94-Lead screw nut, 95-Slider. Detailed Implementation

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0041] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] Example 1

[0045] like Figures 1 to 6 As shown, an automatic spraying device for thermal insulation coating of pipes includes a spraying chamber 1, a pipe fixing unit 2, a spraying unit 3, a drying unit 4, and a purification unit 5.

[0046] The spraying chamber 1 has a box structure with a box door 11 on the front and a support base 6 at the bottom; the box door 11 has an observation window 12; the bottom of the inner cavity of the spraying chamber 1 has a collection trough 7 for collecting dripping paint.

[0047] The pipe fixing unit 2 includes two air shafts 21 located in the spray chamber 1, which can be inserted into the inner sides of the two ends of the pipe 8 and laterally suspended to support the pipe 8 to be sprayed; an electric telescopic rod 22 horizontally installed on the side wall of the spray chamber 1 and whose telescopic end is connected to the end of one of the air shafts 21; and an air supply device 25. The air shafts 21 are equipped with an exhaust valve 23 and an intake valve 24 connected to the air supply device 25. The air supply device 252 is located on the outer side of the bottom of the spray chamber 1, and its outlet end is connected to an inflation pipe 26. The outlet end of the inflation pipe 26 extends into the inner cavity of the spray chamber 1 and is detachably connected to the intake valve 24 on the air shaft 21 through an inflation hose 27. The inflation hose 27 is also detachably connected to the intake valve 24 on the air shaft 21.

[0048] The spraying unit 3 includes an annular spraying pipe 31 that can be sleeved on the outside of the pipe 8, a spraying moving drive assembly that drives the annular spraying pipe 31 to move along the length of the pipe 8, and a spraying liquid supply system that supplies thermal insulation coating to the annular spraying pipe 31. Multiple spraying nozzles 32 are evenly distributed circumferentially on the inner side of the annular spraying pipe 31 and face the outer wall of the pipe. The spraying liquid supply system includes a spraying liquid tank 33, a liquid supply pump 34 connected to the outlet end of the spraying liquid tank 33, and a liquid supply pipe 35 connected to the outlet end of the liquid supply pump 34. An inlet pipe 36 is provided on the annular spraying pipe 31. The inlet end of the inlet pipe 36 is connected to the liquid supply pipe 35 through a retractable elastic liquid supply hose 37. During the process of the spraying moving drive assembly driving the annular spraying pipe 31 to move along the length of the pipe 8, the spraying nozzles 32 spray out thermal insulation coating, and the thermal insulation coating is evenly sprayed on the pipe 8 to form a thermal insulation coating.

[0049] The drying unit 4 includes an annular drying pipe 41 that can be sleeved on the outside of the pipe 8, a drying movement drive assembly that drives the annular drying pipe 41 to move along the length of the pipe 8, and a drying gas supply system that supplies drying gas to the annular drying pipe 41; multiple drying gas nozzles 42 are evenly distributed circumferentially on the inner side of the annular drying pipe 41 and face the outer wall of the pipe 8; the drying gas supply system includes a fan 43, a heater 44 that heats the gas supplied by the fan 43, and a drying gas pipe 45 connected to the outlet of the heater 44; a drying gas inlet pipe 46 is provided on the annular drying pipe 41; the inlet end of the drying gas inlet pipe 46 is connected to the drying gas pipe 45 through a retractable elastic drying gas hose 47; during the process of the drying movement drive assembly driving the annular drying pipe 41 to move along the length of the pipe 8, the drying gas nozzles 46 spray drying gas onto the surface of the pipe 8, so that the heat insulation coating dries quickly.

[0050] The spraying moving drive assembly and the drying moving drive assembly are spatially offset; both the spraying moving drive assembly and the drying moving drive assembly include a guide rail 91 horizontally arranged in the spraying chamber 1, a lead screw 92 installed in the guide rail 91, a drive motor 93 installed outside the spraying chamber 1 and driving the lead screw 92 to rotate, a lead screw nut 94 sleeved on the lead screw 92, and a slider 95 connected to the lead screw nut 94 and slidable along the guide rail 91; the annular spraying pipe 31 and the annular drying pipe 41 are respectively connected to their respective sliders 95.

[0051] The purification unit 5 is used to extract and purify the gas in the spraying chamber 1, including an exhaust fan 51, a purification filter 52 connected to the inlet end of the exhaust fan 51, and an exhaust pipe 53 connected to the inlet end of the purification filter 52; the inlet end of the exhaust pipe 53 extends into the inner cavity of the spraying chamber 1; the purifier 52 is provided with a filter screen layer and an activated carbon adsorption layer.

[0052] Example 2

[0053] like Figure 7 and 8 As shown, based on Embodiment 1, the pipe fixing unit 2, unlike Embodiment 1, also includes a drive motor 28. The drive motor 28 is installed on the outer wall of the spray chamber 1 and connected to the end of another air shaft 21 via a shaft. The drive motor 28 drives the other air shaft 21 to rotate. One of the air shafts 21 connected to the electric telescopic rod 22 is connected to the telescopic end of the electric telescopic rod 22 via a rotary bearing. The drive motor 28 drives the air shaft 21 to rotate, causing the fixed pipe 8 to rotate slowly. In conjunction with the movement of the annular spray pipe 31, the outer wall of the pipe 8 is uniformly and continuously sprayed in a spiral manner.

[0054] The working process of the automatic spraying insulation coating device for pipelines described in this embodiment is as follows:

[0055] Align one end of the pipe 8 to be sprayed with the air shaft 21 connected to the drive motor 28, and insert the air shaft 21 into this end of the pipe 8; stabilize the pipe 8 laterally, and drive the electric telescopic rod 22 to insert the air shaft 21 on the opposite side into the other end of the pipe 8; after the two air shafts 21 are inserted into the two ends of the pipe 8, the air supply device 25 starts to inflate, the air shafts 21 inflate and expand, fixing the pipe 8 and suspending it in the air; remove the air hose 27 connected to the air inlet valve 24; start the drive motor 28, and drive the pipe 8 to rotate slowly;

[0056] When the spraying unit is activated, the spraying liquid supply system pumps the thermal insulation coating into the annular spraying pipe 21; the spraying moving drive component drives the annular spraying pipe 21 to move at a constant speed along the length of the pipe 8, and the pipe 8 rotates itself, so that the spraying nozzle 22 can perform uniform and continuous spiral spraying on the outer wall of the pipe 8.

[0057] After the spraying is completed, the drying unit 4 is started. The drying air supply system generates hot air and sends it into the annular drying pipe 41. The drying moving drive component drives the annular drying pipe 41 to move along the length of the pipe 8 to dry the coating that has just been sprayed and accelerate the curing of the coating.

[0058] Throughout the process, purification unit 5 works continuously, drawing in, filtering, and adsorbing the paint mist, volatile organic compounds, water vapor, and trace volatiles generated during the spraying process, and then releasing the clean air.

[0059] Once the coating has dried to the required level, stop all operating equipment; open the exhaust valve 23, the air shaft 21 exhausts and contracts, and remove the sprayed and dried pipe 8 from the air shaft 21 and move it out of the spraying chamber 1.

[0060] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An apparatus for automatically spraying thermal insulation coating onto pipes, characterized in that, include: The spraying chamber is a box-shaped structure with a door on the front and a support base at the bottom. The pipe fixing unit includes two air shafts located in the spraying chamber that can be inserted into the inner sides of the pipes at both ends and laterally suspended to support the pipes to be sprayed; an electric telescopic rod horizontally installed on the side wall of the spraying chamber and whose telescopic end is connected to the end of one of the air shafts; and an air supply device; the air shafts are equipped with an exhaust valve and an air inlet valve connected to the air supply device. The spraying unit includes an annular spraying pipe that can be sleeved on the outside of the pipe, a spraying moving drive assembly that drives the annular spraying pipe to move along the length of the pipe, and a spraying liquid supply system that supplies thermal insulation coating to the annular spraying pipe; a plurality of spraying nozzles are evenly distributed circumferentially on the inner side of the annular spraying pipe. The drying unit includes an annular drying tube that can be sleeved on the outside of a pipeline, a drying movement drive assembly that drives the annular drying tube to move along the length of the pipeline, and a drying gas supply system that supplies drying gas to the annular drying tube; a plurality of drying gas nozzles are evenly distributed circumferentially on the inner side of the annular drying tube. A purification unit, the air inlet of which is connected to the inner cavity of the spraying chamber, is used to extract and purify the gas inside the spraying chamber.

2. The device for automatically spraying thermal insulation coating on pipelines according to claim 1, characterized in that: The box door is equipped with an observation window.

3. The device for automatically spraying thermal insulation coating on pipelines according to claim 1, characterized in that: The bottom of the inner cavity of the spraying chamber is provided with a collection trough for collecting dripping paint.

4. The device for automatically spraying thermal insulation coatings for pipelines according to claim 1, characterized in that: The air supply device is located at the bottom of the spraying chamber, and the air outlet is connected to an air inflation pipe. The air outlet of the air inflation pipe extends into the inner cavity of the spraying chamber and is detachably connected to the air inlet valve on the air expansion shaft through an air inflation hose.

5. The apparatus for automatically spraying thermal insulation coatings onto pipelines according to claim 1, characterized in that: The pipe fixing unit also includes a drive motor, which is installed on the outer wall of the spraying chamber and connected to the end of another air shaft via a shaft. The drive motor drives the other air shaft to rotate. One of the air shafts connected to the electric telescopic rod is connected to the telescopic end of the electric telescopic rod via a rotary bearing.

6. The apparatus for automatically spraying thermal insulation coatings onto pipelines according to claim 1, characterized in that: The spraying moving drive assembly and the drying moving drive assembly are spatially offset; each of the spraying moving drive assembly and the drying moving drive assembly includes a guide rail arranged laterally in the spraying chamber, a lead screw installed in the guide rail, a drive motor installed outside the spraying chamber and driving the lead screw to rotate, a lead screw nut sleeved on the lead screw, and a slider connected to the lead screw nut and slidable along the guide rail; the annular spraying pipe and the annular drying pipe are respectively connected to their respective sliders.

7. The apparatus for automatically spraying thermal insulation coatings onto pipelines according to claim 1, characterized in that: The spraying liquid supply system includes a spraying liquid tank, a liquid supply pump connected to the outlet end of the spraying liquid tank, and a liquid supply pipe connected to the outlet end of the liquid supply pump; the annular spraying pipe is provided with an inlet pipe; the inlet end of the inlet pipe is connected to the liquid supply pipe through a retractable elastic liquid supply hose.

8. The apparatus for automatically spraying thermal insulation coatings onto pipelines according to claim 1, characterized in that: The drying gas supply system includes a fan, a heater for heating the gas supplied by the fan, and a drying gas pipeline connected to the outlet of the heater; the annular drying pipe is provided with a drying gas inlet pipe; the inlet end of the drying gas inlet pipe is connected to the drying gas pipeline through a retractable elastic drying gas hose.

9. The apparatus for automatically spraying thermal insulation coatings onto pipelines according to claim 1, characterized in that: The purification unit includes an exhaust fan, a purification filter connected to the inlet end of the exhaust fan, and an exhaust pipe connected to the inlet end of the purification filter; the inlet end of the exhaust pipe extends into the inner cavity of the spraying chamber.

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