Pipe spraying device

Abstract

The utility model discloses a spraying device, and particularly relates to a pipe spraying device which comprises a device installation platform, a pipe conveying device is arranged on the device installation platform, a spraying device is arranged above the pipe conveying device, the spraying device is arranged on a spraying support, and the spraying support is arranged on the device installation platform. According to the spraying device, through the adjustable spraying support and the guide mechanism, flexible adjustment of the position and the angle of the spraying gun is achieved, rapid adaptation to pipes with different diameters is achieved, and the universality and the flexibility of equipment are improved; due to the adjustable design of the distance between the driving roller and the driven roller, the processing capacity of the pipes with different sizes is further enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of spraying equipment, and particularly relates to a pipe spraying device. Background Art

[0002] An air preheater is an important environmental protection and energy-saving component in a boiler system, and plays an important role in improving the boiler thermal efficiency, reducing energy consumption, and reducing pollutant emissions. Most of the solid fuels in boilers contain sulfur, and after combustion, flue gas containing sulfur dioxide and sulfur trioxide is generated. When the flue gas passes through the air preheater and the temperature of the cold flue gas drops to the dew point temperature, the condensable components in the flue gas condense to form dew drops, and these dew drops contain strongly corrosive sulfuric acid and sulfurous acid solutions, which will cause serious corrosion effects on the heat exchange tubes of the air preheater. In response to the corrosion problem of the heat exchange tubes of the air preheater, an effective countermeasure commonly adopted in the industry at present is to apply a special anti-corrosion coating on the surface of the heat exchange tubes to enhance the ability of the heat exchange tubes to resist acid corrosion. Compared with the method of manufacturing heat exchange tubes entirely relying on corrosion-resistant alloy materials, the anti-corrosion coating technology shows higher economic benefits and stronger cost-effectiveness advantages on the premise of ensuring the same anti-corrosion performance.

[0003] Although the method of applying an anti-corrosion coating on the surface of the heat exchange tubes has strong advantages, due to the long length of the heat exchange tubes of the air preheater, most of the existing pipe spraying equipment cannot be used, so manual spraying is mostly used at present, and the following problems exist in actual production:

[0004] Spraying with a manually held spray gun has limitations, its continuous production capacity is insufficient, the production efficiency is low, and it cannot adapt to large-scale production scenarios.

[0005] Spraying with a manually held spray gun is affected by human factors, such as the skill level, work experience, work attitude, etc. of the operating workers, and there is a certain instability in the spraying quality, and problems such as uneven coating thickness are likely to occur.

[0006] Harmful gases and dust will be generated during the spraying process, and there is a risk of harming the physical health of the operators.

[0007] Therefore, it is urgent to invent a pipe spraying device to replace the existing manual spraying method. Content of the Utility Model

[0008] The utility model provides a pipe spraying device to solve the problems existing in the above-mentioned prior art and solve the current technical problems.

[0009] The technical solution adopted by the utility model to solve its technical problems is:

[0010] The utility model provides a pipe spraying device, which comprises: a device installation platform, on which a pipe conveying device is arranged, above which a spraying device is arranged, the spraying device is arranged on a spraying bracket, and the spraying bracket is arranged on the device installation platform.

[0011] Preferably, a guiding mechanism is further arranged above the pipe conveying device.

[0012] Preferably, the pipe conveying device comprises a driving roller and driven rollers. The driving rollers are arranged along the axial direction of the pipe on the device installation platform, and a plurality of the driven rollers are located on the same side of the driving rollers. The acute angles formed between the axes of each driven roller and the axis of the driving roller are equal.

[0013] Preferably, the pipe conveying device further comprises a driving device, which provides rotational power for the driving roller, and the driven rollers are driven by a transmission device.

[0014] Preferably, the spraying bracket comprises a column, which is arranged on the device installation platform. An installation rod is fixed on the column through a fastening bushing, and a guiding mechanism is arranged on the installation rod. The guiding mechanism comprises a spring telescopic rod, and a guiding wheel is arranged at the end of the spring telescopic rod.

[0015] Preferably, a load-bearing rod is further arranged on the column, a fixing block is fixed on the load-bearing rod, a spraying gun fixing clamp sleeve is arranged on the fixing block, and a spraying gun is arranged on the spraying gun fixing clamp sleeve.

[0016] Preferably, the driving roller and / or the driven rollers are arranged on a sliding table, and the sliding table is relatively slidably arranged on the device installation platform.

[0017] Preferably, a device guard is installed outside the device installation platform. A plurality of notches are formed in the device guard, and an observation window is further arranged on the upper side of the device guard.

[0018] Preferably, a plurality of spraying guns are installed on the spraying bracket.

[0019] The beneficial effects of the utility model are as follows:

[0020] Through the adjustable spraying bracket and guiding mechanism, the spraying device realizes the flexible adjustment of the position and angle of the spraying gun, and quickly adapts to pipes with different diameters, improving the versatility and flexibility of the equipment; the adjustable design of the distance between the driving roller and the driven rollers further enhances the processing ability for pipes with different sizes.

[0021] By using the design that the driven roller is inclined to the driving roller, not only the automatic feeding of the pipe is realized, but also the uniform rotation of the pipe around its own axis during the forward movement is ensured.

[0022] The production process is changed to cold spraying technology to reduce pollution emissions and improve the bonding strength between the corrosion-resistant coating and the base pipe. Brief Description of the Drawings

[0023] The above aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0024] Figure 1 is a schematic structural diagram of the internal structure of the pipe spraying device according to an embodiment of the present utility model;

[0025] Figure 2 is a schematic structural diagram of the pipe spraying device according to an embodiment of the present utility model;

[0026] Figure 3 is another schematic structural diagram of the internal structure of the pipe spraying device according to an embodiment of the present utility model;

[0027] Figure 4 is another schematic structural diagram of the internal structure of the pipe spraying device according to an embodiment of the present utility model.

[0028] Description of the Reference Numerals

[0029] In Figures 1-4 , the load-bearing rod 1; the fastening bushing 2; the mounting rod 3; the column 4; the fixing block 5; the spray gun fixing jacket 6; the spray gun 7; the spring telescopic rod 8; the guide wheel 9; the driven roller 10; the driving roller 11; the device mounting platform 12; the pipe to be processed 13; the device shield 14; the device frame 15; the guiding mechanism 16. Detailed Embodiments

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] The utility model provides a pipe spraying device, including: a device frame 15, a pipe conveying device, a spraying bracket, a spraying device, and a guiding mechanism 16. The pipe conveying device includes: a driving roller 11, a driven roller 10, and a driving mechanism; the spraying bracket includes: a column 4, a mounting rod 3, a fastening bushing 2, a load-bearing rod 1, and a spray gun fixing clamp 6; the spraying device includes a spray gun 7 and a spraying auxiliary device; the guiding mechanism 16 includes a spring telescopic rod 8 and a guiding wheel 9.

[0032] On the upper side of the device frame 15 of the pipe spraying device is a device installation platform 12. The pipe conveying device is installed on the device installation platform 12. The driving rollers 11 of the pipe conveying device are arranged in parallel along the transportation direction on the device installation platform 12; the driven rollers 10 are arranged on one side of the driving rollers 11. The distance between the axis of each driven roller 10 and the axis of the driving roller 11 is relatively consistent. The axis of the driven roller 10 is inclined to the axis of the driving roller 11, and the included angles formed by the axes of each driven roller 10 are the same. The selection of the number of the above-mentioned driven rollers 10 depends on the weight and length of the designed and processed pipes. The driving device is installed on one side of the device frame 15, and the transmission part of the driving device transmits motion to the driving roller 11 to realize the rotation of the driving roller 11 around its own axis.

[0033] The spraying bracket is installed on one side of the pipe conveying device. The column 4 of the spraying bracket is fixed on the device installation platform 12. A fastening bushing 2 is sleeved outside the column 4 and fixed in position by thread locking. Another same fastening bushing 2 is also fixed outside this fastening bushing 2. After the two fastening bushings 2 are spliced, they are in a cross shape. A load-bearing rod 1 is inserted into the other fastening bushing 2 and is also fixed in position by thread locking; one end of the load-bearing rod 1 close to the conveying device is connected with a fixing block 5. A slot is opened on the side of the fixing block 5. The spray gun fixing clamp 6 is connected to the fixing block 5 by thread and can slide along the slot. The spray gun 7 is clamped on the spray gun fixing clamp 6. The auxiliary spraying device arranged outside the device frame 15 provides spraying materials, compressed air and other auxiliary materials for the spray gun 7 through pipelines. An installation rod 3 is also arranged on the column 4 of the spraying bracket. The axis of the installation rod 3 is relatively parallel to the axis of the driving roller 11 and is arranged in a cross shape with the column 4. The spring telescopic rods 8 of the guiding mechanism 16 are installed on both sides of the installation rod 3, and guiding wheels 9 are installed on the side of the spring telescopic rods 8 close to the conveying device.

[0034] Operating principle of the device: The pipe 13 to be processed is placed between the driving roller 11 and the driven roller 10, and the driving device drives the driving roller 11 to rotate. The driving roller 11 drives the pipe to rotate in the opposite direction through friction, and the rotating pipe drives the driven roller 10 to rotate in the opposite direction of the pipe's rotation. Since the driven roller 10 is inclined, while being driven to rotate by the pipe, it provides a forward driving force for the pipe, realizing the conveying method of the pipe rotating and feeding around its own axis. The pipe 13 to be processed continuously rotates and feeds in the conveying direction. After passing through the gap between the guiding wheel 9, the driving roller 11 and the driven roller 10, it is sent below the spraying gun 7; the pipe rotates around its own axis and feeds forward, so that the distance between the spraying gun 7 and the surface of the pipe 13 to be processed always remains relatively consistent. It should be noted that the feeding speed of the pipe 13 to be processed should match the rotational linear speed; the feeding distance corresponding to one rotation of the pipe 13 to be processed should not be greater than the spot diameter formed by the spraying beam generated by the spraying gun 7 on its surface to ensure that the coating completely covers the surface of the pipe 13 to be processed. The rotation speed of the pipe is controlled by the rotation speed of the driving roller 11. At the same rotation speed, the feeding speed of the pipe is changed by adjusting the included angle between the driven roller 10 and the driving roller 11. The smaller the included angle, the faster the feeding speed.

[0035] Preferably, the above-mentioned spraying bracket is an adjustable mechanism, and the spraying gun 7 can be adjusted in position and angle through a simple positioning and locking mechanism. Further, the guiding device realizes the adjustment of angle and position through the same positioning and locking mechanism.

[0036] Preferably, the above-mentioned spraying device adopts the low-pressure cold spraying technology. During the spraying process of this technology, the spraying material does not undergo any phase transformation, any chemical change and serious material oxidation. (The low-pressure cold spraying material is in powder or granular form, and the material contains one or more substances, such as metal / alloy or ceramic micro-powder)

[0037] Preferably, the driving roller 11 or the driven roller 10 is arranged on the sliding table, and the distance between the two can be adjusted to provide guiding and support for pipes of different diameters.

[0038] Preferably, a device guard 14 is installed outside the device frame 15. There are openings in the device guard 14 on the pipe transportation path and openings for the pipeline of the spraying gun. Further, an observation window is provided on the upper side of the device guard 14, which can be opened or the working condition of the equipment can be observed through the transparent guard plate. Still further, an air outlet is provided on the device guard 14 and is connected to the dust removal equipment air duct.

[0039] Optimally, the driving device provides rotational power for the driving roller 11, and the driven rollers 10 rotate synchronously through a transmission device.

[0040] Optimized, multiple spraying guns 7 are installed on the spraying bracket of the spraying device to spray a heat exchange tube, increasing the area of the spots formed by the spraying beam on the spraying surface and improving the spraying efficiency.

[0041] This application uses a mechanical device to replace manual spraying with a spray gun, enabling continuous and uninterrupted spraying, thereby improving the spraying efficiency; moreover, the distance between the spraying gun 7 and the surface of the pipe to be processed 13 is always kept consistent, improving the stability of the spraying coating quality and ensuring the uniformity of the coating thickness; workers are far away from the spraying device and will not be harmed to their physical health by harmful gases or dust; and this equipment uses cold spraying technology, and no phase transformation, chemical change, or serious material oxidation occurs during the spraying process. Only the dust formed by some spraying materials is also collected by the dust removal equipment.

[0042] Through the adjustable spraying bracket and the guiding mechanism 16, this spraying device realizes the flexible adjustment of the position and angle of the spraying gun 7, as well as the rapid adaptation to pipes of different diameters, improving the versatility and flexibility of the equipment. The adjustable design of the distance between the driving roller 11 and the driven roller 10 further enhances the processing ability for pipes of different sizes.

[0043] By using the design that the driven roller 10 is inclined to the driving roller 11, not only the automatic feeding of the pipe is realized, but also the uniform rotation of the pipe around its own axis during the forward movement is ensured.

[0044] The production process is changed to cold spraying technology to reduce pollution emissions and improve the bonding strength between the corrosion-resistant coating and the base pipe.

[0045] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pipe spraying device, comprising: The device installation platform is characterized in that: a pipe conveying device is arranged on the device installation platform, a spraying device is arranged above the pipe conveying device, the spraying device is arranged on a spraying bracket, and the spraying bracket is arranged on the device installation platform; the pipe conveying device includes an active roller and a driven roller, the active roller is arranged on the device installation platform along the axial direction of the pipe, a plurality of the driven rollers are located on the same side of the active roller, and the acute angle formed between the axis of each driven roller and the axis of the active roller is equal in size; the spraying bracket includes a column, the column is arranged on the device installation platform, a mounting rod is fixed to the column by a tightening sleeve, a guide mechanism is arranged on the mounting rod, the guide mechanism includes a spring telescopic rod, and a guide wheel is arranged at the end of the spring telescopic rod.

2. The pipe spraying device according to claim 1, characterized in that: A guiding mechanism is also arranged above the pipe conveying device.

3. The pipe spraying device according to claim 1, characterized in that: The pipe conveying device also includes a driving device, which provides rotational power for the active roller, and the driven rollers are driven by a transmission device.

4. The pipe spraying device according to claim 1, characterized in that: A load-bearing rod is also provided on the column, a fixing block is fixed on the load-bearing rod, a spray gun fixing jacket is provided on the fixing block, and a spray gun is provided on the spray gun fixing jacket.

5. The pipe spraying device according to claim 1, characterized in that: The active roller and / or the driven roller are arranged on a slide, and the slide is relatively slidably arranged on the device installation platform.

6. The pipe spraying device according to claim 1, characterized in that: A device shield is installed on the outer side of the device installation platform, a plurality of notches are opened on the device shield, and an observation window is also arranged on the upper side of the device shield.

7. The pipe spraying device according to claim 1, characterized in that: A plurality of spray guns are installed on the spray bracket.

Images