A tubing coupling cleaning device
By using a cleaning method that involves fixing the pipe, rotating the brush, and controlling it with a proximity switch, the problem of incomplete cleaning of oil pipe couplings and safety hazards has been solved, achieving efficient and safe cleaning results and adapting to the cleaning needs of couplings of different diameters.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENGLI OILFIELD SHENGJI PETROLEUM EQUIP
- Filing Date
- 2026-06-17
- Publication Date
- 2026-07-14
AI Technical Summary
Existing oil pipe coupling cleaning devices are prone to causing poor paint adhesion or damage to the pipe body during the cleaning process, and the cleaning is incomplete, affecting the appearance quality and posing safety hazards.
The cleaning method employs fixed pipes and rotating brushes, combined with contact positioning and proximity switch control. It utilizes explosion-proof motors, pneumatic motors, and pneumatic diaphragm pumps, and enables remote operation via wireless remote control. A time relay adjusts the cleaning time to meet the cleaning needs of couplings with different diameters.
It achieves efficient and safe cleaning of oil pipe couplings, avoids damage caused by pipe rotation, ensures cleaning quality and production line adaptability, and improves cleaning efficiency and safety.
Smart Images
Figure CN122377784A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of oilfield machinery, and more specifically to a pipe coupling cleaning device. Background Technology
[0002] After the oil pipes and couplings are machine-tightened, they need to be painted in a spray booth. However, since the couplings require additional painting to distinguish their steel grade, the surface of the couplings must be thoroughly cleaned of any paint and oil residue present after passing through the spray booth before applying the colored paint. This ensures better paint adhesion and improves the appearance. Originally, oil pipe coupling cleaning was done manually. Since paint contains harmful substances, prolonged work can be harmful to health. To avoid harming the human body and improve cleaning efficiency, several patents related to coupling cleaning machinery have emerged. For example, patent CN208879148U discloses a coupling paint cleaning fixture. Its main structure consists of a sliding brush mounted on a guide rail. After the pipe reaches the workstation, the brush moves forward to the coupling, the pipe rotates, and thinner is pumped to the top of the coupling, where the brush cleans the paint. However, since the patented method of cleaning by rotating the tube body can easily lead to poor paint adhesion or damage on the production line, and the lack of straightness due to the rotation of the tube body can result in incomplete cleaning of the couplings. Summary of the Invention
[0003] To address the technical problems of pipe paint damage and incomplete cleaning of couplings during the use of existing coupling cleaning machinery, this invention provides an oil pipe coupling cleaning device, the technical solution of which is as follows: A pipe coupling cleaning device includes a frame mechanism, a moving mechanism, a drive mechanism, a dual-shaft mechanism, a transmission mechanism, a feeding mechanism, a brushing mechanism, and a control mechanism. The frame mechanism includes a thinner collection tank and a support frame. The support frame includes an integrally formed top plate, bottom plate, and side plate. One end of the top plate and bottom plate is connected to the upper and lower edges of one side of the thinner collection tank, respectively. The moving mechanism includes a guide groove and casters that move within it. The casters are located at the bottom of the support frame. The drive mechanism includes a first drive assembly and a second drive assembly. The first drive assembly includes a first motor and a lead screw. The first motor is mounted on the bottom plate. One end of the lead screw is fixedly connected to the output shaft of the first motor, and the other end passes through the side plate and is rotatably connected to the side plate. The second drive assembly includes a second motor mounted on the top plate. The dual-shaft mechanism includes a central small shaft and a hollow large shaft fitted around it. The hollow large shaft passes through… The bearing housing is mounted on the top plate, with the front of the central small shaft aligned with the central hole of the internal thread protector placed inside the oil pipe coupling; the transmission mechanism includes two sprockets and a chain meshing with them, one sprocket being mounted on the output shaft of the second motor and the other sprocket being mounted on the hollow main shaft; the feeding mechanism includes a transfer pump and its connected inlet and outlet pipes, one end of the inlet pipe extending into the thin material collection tank, and one end of the outlet pipe having a spraying element positioned above the oil pipe coupling; the brushing mechanism includes a brush, a brush handle, an adjusting plate, and a rotating sleeve, the adjusting plate being connected to the brush handle and the rotating sleeve respectively, and the rotating sleeve being mounted on the hollow main shaft; the control mechanism includes a proximity switch and a time relay, the proximity switch being mounted on the top plate and located behind the central small shaft, the time relay being mounted in the distribution box, the proximity switch being electrically connected to the first motor, and the time relay being electrically connected to the second motor.
[0004] Furthermore, the hollow main shaft has a front limiting ring on its front inner wall and a rear limiting ring on its rear inner wall. The central small shaft has a thick section in the middle, and a buffer spring is provided between the rear end of the thick section and the front end of the rear limiting ring. The buffer spring is fitted around the central small shaft.
[0005] Furthermore, the adjustment plate is provided with a strip-shaped hole, and the brush handle is adjusted and fixed at the strip-shaped hole of the adjustment plate by bolts; the rotating outer sleeve is fixed to the hollow main shaft by screws.
[0006] Furthermore, the lead screw is rotatably connected to the side plate by making a hole in the side plate and fixing a nut that meshes with the lead screw therein.
[0007] Furthermore, the guide grooves are set as two parallel ones, and one caster is set at each of the four corners of the bottom of the support frame.
[0008] Furthermore, the first motor is an explosion-proof motor.
[0009] Furthermore, the second motor is a pneumatic motor.
[0010] Furthermore, the transfer pump is a pneumatic diaphragm pump.
[0011] Furthermore, the atomizing component uses a 316L stainless steel nozzle or a polytetrafluoroethylene plastic nozzle.
[0012] Furthermore, the device is equipped with a wireless remote control receiver.
[0013] Compared with the prior art, the present invention has the following main advantages: 1. This invention abandons the traditional method of cleaning couplings by rotating the pipe body, and instead adopts a novel method of cleaning couplings by fixing the pipe and rotating the brush, which fundamentally avoids the damage to the paint surface caused by pipe rotation and the hidden danger of incomplete cleaning of couplings.
[0014] 2. This invention uses contact positioning and proximity switch to control the relative position of the brush and the coupling, accurately removing paint and oil stains from the coupling and ensuring the appearance quality of the coupling.
[0015] 3. This invention improves the cleaning efficiency of the device and its adaptability to the production line by adjusting the cleaning time of the docking clamp using a time relay.
[0016] 4. This invention can adapt to the cleaning of couplings of different diameters by adjusting the position and size of the brush.
[0017] 5. This invention uses an explosion-proof motor, a pneumatic motor, and a pneumatic diaphragm pump to prevent flammable paint and thinner from being ignited by tiny electric sparks, ensuring safe and stable operation of the device and guaranteeing the safety of operators.
[0018] 6. This invention enables remote manual operation by equipping it with a wireless remote control receiver. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structural layout of the present invention; Figure 2 This is a schematic diagram showing the relative orientation of the brushing mechanism and the dual-axis mechanism of the present invention to the oil pipe coupling; Figure 3 This is a schematic diagram of the assembly of the dual-axis mechanism of the present invention; In the diagram: 1-Thin material collection tank, 2-Brush, 3-Discharge pipe, 4-Spraying component, 5-Brush handle, 6-Adjusting plate, 7-Rotating outer sleeve, 8-Bearing seat, 9-Hollow main shaft, 10-Chain, 11-Sprocket, 12-Second motor, 13-Proximity switch, 14-Transfer pump, 15-Top plate, 16-Side plate, 17-Lead screw, 18-First motor, 19-Base plate, 20-Feed pipe, 21-Cast wheel, 22-Guide groove, 23-Bolt, 24-Strip hole, 25-Screw, 26-Central small shaft, 27-Intermediate hole, 28-Internal thread protector, 29-Oil pipe coupling, 30-Front limit ring, 31-Thick section, 32-Buffer spring, 33-Rear limit ring, 34-Support frame. Detailed Implementation
[0020] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings. Example 1
[0021] See Figure 1 , Figure 2 and Figure 3A pipe coupling cleaning device includes a frame mechanism, a moving mechanism, a drive mechanism, a dual-axis mechanism, a transmission mechanism, a feeding mechanism, a brushing mechanism, and a control mechanism. The frame mechanism includes a thinner collection tank 1 and a support frame 34. The support frame 34 includes a top plate 15, a bottom plate 19, and a side plate 16 that are integrated together. One end of the top plate 15 and the bottom plate 19 are respectively connected to the upper and lower edges of one side of the thinner collection tank 1. The moving mechanism includes a guide groove 22 and casters 21 that move within it. The casters 21 are located at the bottom of the support frame 34. The drive mechanism includes a first drive assembly and a second drive assembly. The first drive assembly includes a first motor 18 and a lead screw 17. The first motor 18 is mounted on the bottom plate 19. One end of the lead screw 17 is fixedly connected to the output shaft of the first motor 18, and the other end passes through the side plate 16 and is rotatably connected to the side plate 16. The second drive assembly includes a second motor 12 mounted on the top plate 15. The dual-axis mechanism includes a central small shaft 26 and a hollow large shaft 9 fitted outside it. The hollow large shaft 9 is connected to a bearing seat 8. Mounted on the top plate 15, the front of the central small shaft 26 is aligned with the middle hole 27 of the internal thread protector 28 placed inside the oil pipe coupling 29; the transmission mechanism includes two sprockets 11 and a chain 10 meshing with them, one sprocket 11 is mounted on the output shaft of the second motor 12, and the other sprocket 11 is mounted on the hollow main shaft 9; the feeding mechanism includes a transfer pump 14 and its connected inlet pipe 20 and outlet pipe 3, one end of the inlet pipe 20 extends into the thin material collection tank 1, and one end of the outlet pipe 3 is equipped with a spraying element 4 and The brushing mechanism is positioned above the oil pipe coupling 29. It includes a brush 2, a brush handle 5, an adjusting plate 6, and a rotating outer sleeve 7. The adjusting plate 6 is connected to the brush handle 5 and the rotating outer sleeve 7, respectively. The rotating outer sleeve 7 is mounted on the hollow main shaft 9. The control mechanism includes a proximity switch 13 and a time relay. The proximity switch 13 is mounted on the top plate 15 and is located behind the central small shaft 26. The time relay is installed in the distribution box. The proximity switch 13 is electrically connected to the first motor 18, and the time relay is electrically connected to the second motor 12. Example 2
[0022] See Figure 1 , Figure 2 and Figure 3 A pipe coupling cleaning device, based on the technical solution described in Embodiment 1, has a front limiting ring 30 on the inner wall of the front end of the hollow large shaft 9, a rear limiting ring 33 on the inner wall of the rear end of the hollow large shaft 9, a thick section 31 in the middle of the central small shaft 26, a buffer spring 32 between the rear end of the thick section 31 and the front end of the rear limiting ring 33, and the buffer spring 32 is fitted around the central small shaft 26. Example 3
[0023] See Figure 1 , Figure 2 and Figure 3A pipe coupling cleaning device, based on the technical solution described in Embodiment 1, wherein the adjusting plate 6 is provided with a strip hole 24, and the brush handle 5 is adjusted and fixed at the strip hole 24 of the adjusting plate 6 by bolts 23; the rotating outer sleeve 7 is fixed to the hollow shaft 9 by screws 25. Example 4
[0024] See Figure 1 , Figure 2 and Figure 3 A pipe coupling cleaning device, based on the technical solution described in Embodiment 1, wherein the lead screw 17 and the side plate 16 are rotatably connected by making a hole in the side plate 16 and fixing a nut that meshes with the lead screw 17 therein. Example 5
[0025] See Figure 1 , Figure 2 and Figure 3 An oil pipe coupling cleaning device, based on the technical solution described in Embodiment 1, has two parallel guide grooves 22 and casters 21 at each of the four corners of the bottom of the support frame 34 to enhance stability. Example 6
[0026] See Figure 1 , Figure 2 and Figure 3 A pipe coupling cleaning device, based on the technical solution described in Embodiment 1, includes a first motor 18 that is an explosion-proof motor; a second motor 12 that is a pneumatic motor; and a transfer pump 14 that is a pneumatic diaphragm pump. The explosion-proof and pneumatic types are chosen primarily for safety reasons. These types prevent flammable paint and thinner from being ignited by small electric sparks, ensuring safe and stable operation of the device and guaranteeing the safety of the operators. Example 7
[0027] See Figure 1 , Figure 2 and Figure 3 An oil pipe coupling cleaning device, based on the technical solution described in Example 1, uses a 316L stainless steel nozzle or a polytetrafluoroethylene (PTFE) plastic nozzle for the abrasive part 4 to enhance its corrosion resistance. Example 8
[0028] See Figure 1 , Figure 2 and Figure 3 A pipe coupling cleaning device, based on the technical solution described in Embodiment 1, is equipped with a wireless remote control receiver, enabling remote manual operation.
[0029] To enable those skilled in the art to better understand the present invention, its basic working principle is briefly described below: The main function of this invention is to clean the paint off the oil pipe coupling 29 portion of the oil pipe product after it has passed through the paint spraying box. To ensure stable cleaning of the oil pipe coupling 29, the entire device utilizes a first motor 18 and a lead screw 17 to drive the device at a uniform speed, and casters 21 to move it forward within a guide groove 22. The front end of the moving central shaft 26 contacts and rests inside the internal thread protector 28 of the oil pipe coupling 29. The internal thread protector 28 is fixed to the inside of the oil pipe coupling 29 by a helical engagement. The internal thread protector 28 has a central hole 27 of a certain depth. After the end of the central shaft 26 reaches the bottom of the central hole 27, as the hollow main shaft 9 moves forward, the buffer spring 32 is compressed, causing the rear end of the central shaft 26 to extend and trigger a proximity switch 13. The proximity switch 13 controls the first motor 18 to shut down, stopping the device from moving forward, thus achieving precise positioning of the brush 2 and the surface of the oil pipe coupling 29. The second motor 12 starts to drive the sprocket 11 and chain 10 to rotate, simultaneously driving the rotating outer sleeve 7 and brush 2 to rotate. The transfer pump 14 stably delivers the thinner from the thinner collection tank 1 to the spraying component 4. The thinner is sprayed onto the surface of the oil pipe coupling 29, and the brush 2 cleans the oil pipe couplings 29 of various specifications and models (the position of the brush 2 is adjusted by the bolt 23, and the brushing length can be adjusted by replacing the brush 2). The second motor 12 is controlled to rotate via a time relay (in the distribution box). After the brush 2 rotates and cleans for a certain period of time, the second motor 12 stops, and the first motor 18 and lead screw 17 rotate to move the device backward to the initial position, completing one coupling cleaning cycle. Subsequently, the buffer spring 32 gradually extends, and the central small shaft 26 returns to its original state. No additional motor operation is required, saving energy and reducing the risk of device operation. The movement and start / stop of the device can be remotely adjusted via a wireless remote control receiver, enabling more efficient calibration and effectively avoiding the impact of potential device malfunctions. The time relay can adjust the cleaning time of the oil pipe coupling 29 according to factors such as cleaning efficiency and production line flow speed, increasing the cleaning efficiency of the device and its adaptability to the production line. Using the transfer pump 14 for replenishment and recycling of the thinner can achieve stable liquid delivery and ensure high-quality cleaning of the oil pipe coupling 29.
Claims
1. A pipe coupling cleaning device, characterized in that, The system includes a frame mechanism, a moving mechanism, a drive mechanism, a dual-axis mechanism, a transmission mechanism, a feeding mechanism, a washing mechanism, and a control mechanism. The frame mechanism includes a thinner collection tank and a support frame. The support frame includes an integral top plate, a bottom plate, and a side plate, with one end of the top plate and bottom plate connected to the upper and lower edges of one side of the thinner collection tank, respectively. The moving mechanism includes a guide groove and casters that move within it, with the casters located at the bottom of the support frame. The drive mechanism includes a first drive assembly and a second drive assembly. The first drive assembly includes a first motor and a lead screw. The first motor is mounted on the bottom plate, and one end of the lead screw is fixedly connected to the output shaft of the first motor, while the other end extends through the side plate and is rotatably connected to it. The second drive assembly includes a second motor mounted on the top plate. The dual-axis mechanism includes a central small shaft and a hollow large shaft fitted around it. The hollow large shaft is mounted on a bearing seat. On the top plate, the front of the central small shaft is aligned with the middle hole of the internal thread protector installed inside the oil pipe coupling; the transmission mechanism includes two sprockets and a chain meshing with them, one sprocket is installed on the output shaft of the second motor, and the other sprocket is installed on the hollow main shaft; the feeding mechanism includes a transfer pump and its connected inlet and outlet pipes, one end of the inlet pipe extends into the thin material collection tank, and one end of the outlet pipe is equipped with a spraying element and is placed above the oil pipe coupling; the brushing mechanism includes a brush, a brush handle, an adjusting plate, and a rotating sleeve, the adjusting plate is connected to the brush handle and the rotating sleeve respectively, and the rotating sleeve is installed on the hollow main shaft; the control mechanism includes a proximity switch and a time relay, the proximity switch is installed on the top plate and behind the central small shaft, the time relay is installed in the distribution box, the proximity switch is electrically connected to the first motor, and the time relay is electrically connected to the second motor.
2. The oil pipe coupling cleaning device according to claim 1, characterized in that, The hollow main shaft has a front limiting ring on its front inner wall and a rear limiting ring on its rear inner wall. The central small shaft has a thick section in the middle. A buffer spring is provided between the rear end of the thick section and the front end of the rear limiting ring. The buffer spring is fitted around the central small shaft.
3. The oil pipe coupling cleaning device according to claim 1, characterized in that, The adjustment plate is provided with a strip-shaped hole. The brush handle is adjusted and fixed at the strip-shaped hole of the adjustment plate by bolts. The rotating outer sleeve is fixed to the hollow main shaft by screws.
4. The oil pipe coupling cleaning device according to claim 1, characterized in that, The lead screw is rotatably connected to the side plate by making a hole in the side plate and fixing a nut that meshes with the lead screw therein.
5. The oil pipe coupling cleaning device according to claim 1, characterized in that, The guide grooves are set as two parallel ones, and there is one caster at each of the four corners of the bottom of the support frame.
6. The oil pipe coupling cleaning device according to claim 1, characterized in that, The first motor is an explosion-proof motor.
7. The oil pipe coupling cleaning device according to claim 1, characterized in that, The second motor is a pneumatic motor.
8. The oil pipe coupling cleaning device according to claim 1, characterized in that, The transfer pump is a pneumatic diaphragm pump.
9. The oil pipe coupling cleaning device according to claim 1, characterized in that, The atomizing component uses a 316L stainless steel nozzle or a polytetrafluoroethylene plastic nozzle.
10. The oil pipe coupling cleaning device according to claim 1, characterized in that, The device is equipped with a wireless remote control receiver.