An automatic paint residue removing device for a drive chain of an oilfield downhole casing anticorrosion production line

Abstract

The utility model discloses an automatic paint residue removing device of oilfield downhole casing anticorrosion production line transmission chain, relates to paint residue removing device field, including transmission sprocket, the middle position of transmission sprocket is provided with support shaft, and the oil water well casing is placed on transmission sprocket top, and the symmetrical clamping of support shaft outer surface has meshing gear, is equipped with a plurality of no. The outer surface of meshing gear is provided with a plurality of no. The upper and lower ends of meshing gear are provided with fixed mechanism, for fixing meshing gear on the outer surface of support shaft, the meshing gear is installed on the outer surface of support shaft, and the support roller rotates with the chain pin shaft and enters no. The solid paint residue adhered to the surface of support roller can be automatically removed, and it is not necessary to use hammer and steel brush to knock and polish after manual shutdown, the problem of time -consuming and labor -intensive of present manual cleaning is solved completely, chain cleaning working hours are saved, chain cleaning manual is reduced, and artificial cost is reduced obviously.

Description

Technical Field

[0001] This utility model relates to paint slag removal device technology, specifically to an automatic paint slag removal device for the transmission chain of an oilfield downhole casing anti-corrosion production line. Background Technology

[0002] Oil and water well casings are core components of oilfield downhole operations. They are exposed to corrosive media such as oil and salt water for extended periods, requiring anti-corrosion treatment to ensure their service life. Therefore, the oilfield downhole casing anti-corrosion production line is a crucial link in casing manufacturing. Existing oil and water well casing anti-corrosion production lines generally employ solvent-free epoxy high-pressure airless spraying technology. This process uses solvent-free epoxy resin as the anti-corrosion coating material, and the coating is evenly sprayed onto the outer surface of the casing using high-pressure airless spraying equipment, forming a dense anti-corrosion protective layer. Compared to traditional solvent-based spraying, it has advantages such as strong coating adhesion, no volatile harmful gases, and good environmental performance. After spraying, the sleeve needs to be placed on the transmission chain of the production line. Several support rollers are set at intervals on the transmission chain. The sleeve is stably supported and axially driven by the support rollers. The transmission chain transports the sleeve to the baking oven, where it is heated and cured at a specific temperature. This allows the solvent-free epoxy coating to form a stable cross-linked structure, which has excellent anti-corrosion performance. Since the sleeve is in direct contact with the support rollers during the curing process, the coating at the contact point cannot fully participate in the curing reaction and is prone to local damage due to the support pressure. Therefore, after curing, the coating at the process contact point between the outer surface of the sleeve and the chain support rollers needs to be recoated to ensure the integrity of the overall anti-corrosion performance of the sleeve.

[0003] In actual production, during the long-term transport of sleeves, the support rollers on the drive chain will accumulate incompletely cured solvent-free epoxy coating residue due to contact with the outer surface of the sleeve. After heat conduction from the baking oven and subsequent air cooling, this residue will form solid paint sludge on the surface of the support rollers. As the number of production batches increases, the solid paint sludge on the rollers will accumulate more and more. Due to the high hardness of the paint sludge, when transporting new sleeves for coating, the paint sludge will exert a squeezing and scratching effect on the fresh coating on the outer surface of the sleeve, resulting in scars at the process support points where the sleeve coating contacts the rollers. The more paint sludge accumulates, the deeper and larger the scars become. This not only significantly increases the area to be recoated during subsequent touch-up coating, prolonging the touch-up process time, but also causes a decrease in the smoothness of the coating on the outer surface of the sleeve after touch-up due to differences in the connection between the touch-up area and the original coating, resulting in appearance defects (such as obvious touch-up marks and local bulges), affecting product quality. To address this issue, existing production lines typically employ periodic manual cleaning: workers must use hammers, steel brushes, and other tools to knock or grind away paint residue from the chain bed and support rollers when the production line is stopped. This cleaning method is not only time-consuming and labor-intensive, requiring significant production downtime and reducing overall production line efficiency, but the knocking process can also cause mechanical impact damage to the support structure of the chain bed and the connecting parts of the drive sprockets. Grinding operations may also wear down the surface precision of the support rollers, leading to decreased stability when the rollers subsequently transport sleeves, ultimately shortening the overall service life of the drive chain and chain bed equipment, and increasing equipment maintenance costs. Utility Model Content

[0004] The purpose of this invention is to provide an automatic paint sludge removal device for the transmission chain of an oilfield downhole casing anti-corrosion production line, so as to solve the problem of inconvenient cleaning of residual solid paint sludge on the rollers in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic paint slag removal device for the transmission chain of an oilfield downhole casing anti-corrosion production line, comprising a transmission sprocket, a support shaft provided at the middle position of the transmission sprocket, an oil or water well casing placed above the transmission sprocket, meshing gears symmetrically engaged on the outer surface of the support shaft, a plurality of second-order arc-shaped grooves opened on the outer surface of the meshing gears, and fixing mechanisms provided at the upper and lower ends of the meshing gears for fixing the meshing gears to the outer surface of the support shaft;

[0006] The fixing mechanism includes a fixing plate, which is symmetrically fixed to the upper and lower ends of the meshing gear. Threaded fasteners are installed at the front and rear ends of the two fixing plates that are close to each other, and a fastening nut is threadedly connected to one side of the outer surface of the threaded fastener.

[0007] The outer surface of the transmission sprocket is also provided with a support structure for stable support of the oil and water well casing.

[0008] Furthermore, the support structure includes several chain plates, which are symmetrically arranged side by side above the transmission sprocket. A chain pin is rotatably installed between two adjacent chain plates near the edge. A support roller is provided in the middle of one side of the outer surface of the chain pin, and the oil and water well casing is located on the upper surface of the support roller.

[0009] Furthermore, the outer surface of the transmission sprocket is provided with several arc-shaped grooves of the first type, and the front and rear ends of the outer surface of the chain pin are located inside the arc-shaped grooves of the first type, and the arc-shaped grooves of the first type and the chain pin are interlocked with each other.

[0010] Furthermore, the outer diameter of the support roller is smaller than the inner diameter of the second arc groove, one side of the outer surface of the support roller is located inside the second arc groove, and the support roller and the second arc groove are mutually adapted.

[0011] Furthermore, a positioning groove is provided on one side of the inner wall of the meshing gear, the outer diameter of the support shaft is smaller than the inner diameter of the positioning groove, and the support shaft and the positioning groove are interlocked.

[0012] Furthermore, a fixing hole is provided through one side of the fixing plate, the threaded fastener passes through the fixing hole, and one side of the fastening nut abuts against the outer surface of the fixing plate.

[0013] Compared with the prior art, the automatic paint slag removal device for the transmission chain of the oilfield downhole casing anti-corrosion production line provided by this utility model has the following beneficial effects:

[0014] 1. This utility model utilizes the brittle properties of solvent-free epoxy paint residue by adding a meshing gear to the outer surface of the support shaft. When the transmission sprocket is running, the support roller rotates with the chain pin and enters the second arc groove of the meshing gear. The two generate a squeezing and friction effect, which can automatically remove the solid paint residue adhering to the surface of the support roller. There is no need to manually stop the machine and use a hammer or steel brush to knock and polish it. This completely solves the problem of time-consuming and labor-intensive manual cleaning, saves chain cleaning time, reduces the manual cleaning of the chain, and significantly reduces labor costs.

[0015] 2. This utility model can avoid the scars on the support rollers caused by paint residue accumulation on the support rollers through automatic paint residue removal, which greatly reduces the area of ​​sleeve coating repair and improves the appearance quality after repair (reducing repair marks, local protrusions and other defects); at the same time, it reduces the consumption of repair paint and improves the efficiency of repair workers.

[0016] 3. This utility model avoids mechanical impact damage to the chain bed support structure and transmission chain connectors caused by manual hammering, as well as wear on the surface precision of the support rollers caused by grinding. It extends the service life of the transmission chain and chain bed equipment, reduces the frequency and cost of equipment maintenance (such as reducing the cost of replacing chain connectors and repairing support rollers), and shortens equipment maintenance time, reducing production line downtime caused by maintenance and improving production efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the transmission sprocket structure provided in an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the support roller provided in an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the meshing gear structure provided in an embodiment of the present utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Drive sprocket; 2. Support shaft; 3. Meshing gear; 4. Positioning slot; 5. Fixing plate; 6. Threaded fastener; 7. Fastening nut; 8. No. 1 arc groove; 9. Chain plate; 10. Chain pin; 11. Support roller; 12. No. 2 arc groove; 13. Oil and water well casing. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] As attached Figure 1 To be continued Figure 4 As shown:

[0026] Example 1:

[0027] This utility model provides an automatic paint slag removal device for the transmission chain of an oilfield downhole casing anti-corrosion production line, including a transmission sprocket 1, a support shaft 2 at the middle position of the transmission sprocket 1, an oil and water well casing 13 placed above the transmission sprocket 1, meshing gears 3 symmetrically engaged on the outer surface of the support shaft 2, a positioning groove 4 is opened on one side of the inner wall of the meshing gear 3, the outer diameter of the support shaft 2 is smaller than the inner diameter of the positioning groove 4, the support shaft 2 and the positioning groove 4 are interlocked, a plurality of second arc grooves 12 are opened on the outer surface of the meshing gear 3, and a fixing mechanism is provided at the upper and lower ends of the meshing gear 3 for fixing the meshing gear 3 to the outer surface of the support shaft 2;

[0028] The fixing mechanism includes a fixing plate 5, which is symmetrically fixed to the upper and lower ends of the meshing gear 3. Threaded fasteners 6 are installed at the front and rear ends of the two fixing plates 5 that are close to each other. A fastening nut 7 is threadedly connected to one side of the outer surface of the threaded fastener 6. A fixing hole is opened through one side of the fixing plate 5. The threaded fastener 6 passes through the fixing hole. One side of the fastening nut 7 abuts against the outer surface of the fixing plate 5.

[0029] The outer surface of the transmission sprocket 1 is also provided with a support structure for stable support of the oil and water well casing 13.

[0030] Working principle: First, connect and fix both ends of the support shaft 2 to the bearing seats of the production line frame, so that the transmission sprocket 1 is in a horizontal operating state; take two meshing gears 3, align the positioning grooves 4 on their inner walls with the outer surface of the support shaft 2, and push the meshing gears 3 along the axial direction of the support shaft 2 so that the support shaft 2 is embedded in the positioning grooves 4; the positioning grooves 4 can quickly position the meshing gears 3 and prevent the meshing gears 3 from shaking radially along the support shaft 2. The two meshing gears 3 are symmetrically distributed on both sides of the transmission sprocket 1, with the spacing appropriate to the width of the transmission sprocket 1. Align the two adjacent fixing plates 5 (located at the upper and lower ends of the two meshing gears 3 respectively) so that the fixing holes on the fixing plates 5 are coaxial. Then, insert the threaded fastener 6 (fully threaded bolt) into the fixing hole of one fixing plate 5 and out the other side. Put the fastening nut 7 on the end of the threaded fastener 6 that is out of the hole, and tighten the fastening nut 7 clockwise with a wrench until one side of the fastening nut 7 is tightly against the outer surface of the fixing plate 5. At this time, the two fixing plates 5 are clamped and the meshing gears 3 are stably fixed on the support shaft 2 without the risk of axial displacement.

[0031] The production line's drive motor rotates the support shaft 2, which in turn drives the transmission sprocket 1 and the meshing gear 3 to rotate (all three rotate at the same speed). When the transmission sprocket 1 rotates, it drives the subsequent support structure chain plate 9, chain pin 10, and support roller 11 to move. When the support roller 11 moves with the chain to the position of the meshing gear 3, one side of its outer surface gradually embeds into the second arc-shaped groove 12 of the meshing gear 3. Because the outer diameter of the support roller 11 is smaller than the inner diameter of the second arc-shaped groove 12, and their curvatures are compatible, the inner wall of the second arc-shaped groove 12... The roller 11 is in close contact with the outer surface of the support roller 11, generating a squeezing and friction effect. The solid paint residue (solvent-free epoxy material, which is brittle) attached to the surface of the support roller 11 is gradually detached and broken off from the surface of the support roller 11 under the squeezing and friction effect. The broken paint residue is collected by the collection device (such as the slag collection trough) below the production line to avoid scattering and pollution. The support roller 11 continues to move with the chain and gradually separates from the second arc groove 12. At this time, there is no obvious paint residue left on the surface of the support roller 11, and it can continue to be used to support and transport the newly sprayed oil and water well casing 13 without scratching the casing coating and forming scars.

[0032] When it is necessary to adjust the paint residue removal effect (such as incomplete paint residue removal), the operator can stop the machine, loosen the fastening nut 7, adjust the position of the meshing gear 3 on the support shaft 2 (such as reducing the distance between the meshing gear 3 and the support roller 11), and then tighten the fastening nut 7 again to enhance the squeezing friction between the two and improve the paint residue removal effect. If it is necessary to further improve the cleaning efficiency, another set of meshing gears 3 and fixing mechanism can be added to the production line frame outside the transmission sprocket 1, following the same steps as above, so that the support roller 11 passes through the second arc groove 12 of the inner and outer sets of meshing gears 3 in succession during the movement, so as to achieve simultaneous removal of paint residue from the inner and outer sides and ensure thorough paint residue removal.

[0033] Example 2:

[0034] This embodiment is basically the same as the previous embodiment, except that the support structure includes several chain plates 9, which are arranged symmetrically in parallel above the transmission sprocket 1. A chain pin 10 is rotatably installed between two adjacent chain plates 9 near the edge. A support roller 11 is provided in the middle of one side of the outer surface of the chain pin 10, and the oil and water well casing 13 is located on the upper surface of the support roller 11.

[0035] The outer surface of the transmission sprocket 1 is provided with several arc-shaped grooves 8. The front and rear ends of the outer surface of the chain pin 10 are located inside the arc-shaped grooves 8. The arc-shaped grooves 8 and the chain pin 10 are interlocked.

[0036] The outer diameter of the support roller 11 is smaller than the inner diameter of the second arc groove 12. One side of the outer surface of the support roller 11 is located inside the second arc groove 12, and the support roller 11 and the second arc groove 12 are mutually compatible.

[0037] Working principle: First, the operator places several chain plates 9 side by side above the transmission sprocket 1. Chain pins 10 are inserted into pre-set holes on the edges of adjacent chain plates 9, and bearings are installed at the contact points between the chain pins 10 and the chain plates 9, allowing the chain pins 10 to rotate freely around their own axis. Then, a support roller 11 is interference-fitted onto the middle of the outer surface of the chain pin 10, ensuring that the support roller 11 rotates synchronously with the chain pin 10 without relative slippage. The position of the chain pin 10 is adjusted so that the front and rear ends of the outer surface of the chain pin 10 are respectively embedded into the first arc-shaped groove 8 on the outer surface of the transmission sprocket 1. The first arc-shaped groove 8 and the chain pin 10 are interlocked, restricting the axial displacement of the chain pin 10 and ensuring that the support roller 11 always remains on the horizontal conveying trajectory, preventing the oil / water well casing 13 from falling off due to deviation.

[0038] The drive motor rotates the support shaft 2, transmission sprocket 1, and meshing gear 3. The transmission sprocket 1 drives the chain plate 9 to move, and the chain plate 9 drives the chain pin 10 and support roller 11 to move synchronously. The worker hoists the sprayed oil and water well casing 13 and places it on the upper surface of the support roller 11. The support roller 11 rotates around the chain pin 10, driving the oil and water well casing 13 to move smoothly along the production line axis and be transported to the baking oven for heating and curing. When the support roller 11 moves to the position of the meshing gear 3... As described in Example 1, the paint residue is removed by the squeezing and friction between the No. 2 arc groove 12 and the support roller 11, ensuring that the surface of the support roller 11 is clean. After curing, the oil and water well casing 13 is output from the baking oven, and the support roller 11 continues to transport the casing to the next process (such as touch-up coating). Since there is no paint residue on the support roller 11, there are no scars at the process support points of the casing coating, the touch-up area is greatly reduced, and the touch-up personnel only need to touch up a small number of contact points, which significantly improves the efficiency. Moreover, the appearance after touch-up coating is smooth and there are no obvious touch-up marks.

[0039] During production line operation, staff regularly check the fixing status of meshing gear 3 (such as whether fastening nut 7 is loose), the rotational flexibility of support roller 11, and the engagement status of arc groove 8 and chain pin 10. If the support roller 11 is found to be stuck, the machine can be stopped and the bearing of chain pin 10 can be checked for wear. If the bearing is replaced in time, the support roller 11 can be rotated normally. If fastening nut 7 is loose, it should be tightened in time to prevent meshing gear 3 from shifting and to ensure stable paint sludge removal effect.

[0040] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic paint slag removal device for the transmission chain of an oilfield downhole casing anti-corrosion production line, comprising a transmission sprocket (1), a support shaft (2) provided at the middle position of the transmission sprocket (1), and an oil / water well casing (13) placed above the transmission sprocket (1), characterized in that, The outer surface of the support shaft (2) is symmetrically fitted with meshing gears (3), and the outer surface of the meshing gears (3) is provided with several second arc grooves (12). The upper and lower ends of the meshing gears (3) are provided with fixing mechanisms to fix the meshing gears (3) on the outer surface of the support shaft (2). The fixing mechanism includes a fixing plate (5), which is symmetrically fixed to the upper and lower ends of the meshing gear (3). Threaded fasteners (6) are installed at the front and rear ends of the two fixing plates (5) that are close to each other. A fastening nut (7) is threadedly connected to one side of the outer surface of the threaded fastener (6). The outer surface of the transmission sprocket (1) is also provided with a support structure for stable support of the oil and water well casing (13).

2. The automatic paint slag removal device for the transmission chain of an oilfield downhole casing anti-corrosion production line according to claim 1, characterized in that, The support structure includes several chain plates (9), which are arranged symmetrically in parallel above the transmission sprocket (1). A chain pin (10) is rotatably installed between two adjacent chain plates (9) near the edge. A support roller (11) is provided in the middle of one side of the outer surface of the chain pin (10). The oil and water well casing (13) is located on the upper surface of the support roller (11).

3. The automatic paint slag removal device for the transmission chain of an oilfield downhole casing anti-corrosion production line according to claim 2, characterized in that, The outer surface of the transmission sprocket (1) is provided with several arc-shaped grooves (8). The front and rear ends of the outer surface of the chain pin (10) are located inside the arc-shaped grooves (8). The arc-shaped grooves (8) and the chain pin (10) are interlocked.

4. The automatic paint slag removal device for the transmission chain of an oilfield downhole casing anti-corrosion production line according to claim 2, characterized in that, The outer diameter of the support roller (11) is smaller than the inner diameter of the second arc groove (12). One side of the outer surface of the support roller (11) is located inside the second arc groove (12). The support roller (11) and the second arc groove (12) are mutually compatible.

5. The automatic paint slag removal device for the transmission chain of an oilfield downhole casing anti-corrosion production line according to claim 1, characterized in that, The meshing gear (3) has a positioning groove (4) on one side of its inner wall. The outer diameter of the support shaft (2) is smaller than the inner diameter of the positioning groove (4). The support shaft (2) and the positioning groove (4) are fitted together.

6. The automatic paint slag removal device for the transmission chain of an oilfield downhole casing anti-corrosion production line according to claim 1, characterized in that, The fixing plate (5) has a through hole on one side, the threaded fastener (6) passes through the fixing hole, and the fastening nut (7) abuts against the outer surface of the fixing plate (5) on one side.

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