Pipe inner wall rust removal device

Abstract

This application discloses a pipe inner wall rust removal device, including an abrasive spraying assembly, a mounting frame, a water-grinding nozzle, a nozzle support, and a nozzle control. The abrasive spraying assembly is connected to the water-grinding nozzle. A support plate is provided on the mounting frame, and two winding rollers, a synchronous drive, a pipe clamp, and a tensioning component are provided on the support plate. The winding rollers are connected to the synchronous drive, and the nozzle support and nozzle control are connected to the rope on the winding rollers. The tensioning component abuts against the rope. The water-grinding nozzle is mounted on the nozzle support, and the nozzle support and nozzle control are connected by a retraction rope. The nozzle support includes a pressure sensor and a pressure transmitter. Thus, by using water grinding and controlling the nozzle to move and spray inside the curved pipe, the inner wall of the curved pipe is rusted and polished. This method has good polishing effect, is pollution-free, and is applicable to pipes of different materials.

Description

Technical Field

[0001] This application relates to the technical field of pipe processing, and more particularly to a rust removal device for the inner wall of pipes. Background Technology

[0002] Pipe bends are core fittings in fluid transportation, petrochemicals, and machinery manufacturing, and the quality of their inner walls directly determines the pipeline's operational efficiency and service life. Their inner walls are in constant contact with humid air and corrosive fluids, making them prone to rust formation and impurity buildup. This not only increases fluid resistance and accelerates pipe wall corrosion but also leads to pipe blockages and media contamination, affecting subsequent pipeline assembly and actual operational use. Therefore, the inner walls of bends, especially the bend's dead angles, must undergo comprehensive and uniform rust removal and polishing. This is a crucial process for ensuring pipeline performance and extending its service life.

[0003] The traditional methods for removing rust from the inner wall of bent pipes are chemical soaking or magnetic abrasive polishing. However, chemical soaking requires strong acid electrolytes, which cause significant pollution. Magnetic abrasive polishing is not very effective for non-highly magnetic materials such as stainless steel, copper, and aluminum. Magnetic forces are easily disrupted at the bends of the pipes, resulting in poor rust removal and polishing. Furthermore, magnetic abrasive particles are easily attracted to the inner wall of the pipes, making cleaning difficult. Summary of the Invention

[0004] This application aims to at least partially address one of the technical problems in the related art.

[0005] Therefore, the purpose of this application is to provide a pipe inner wall rust removal device. This device adopts a water-jet polishing method, controlling the movement of the nozzle inside the bend and performing spray polishing, which can achieve precise rust removal and polishing treatment on the bending part of the bend, effectively improving the overall polishing effect of the bend. In addition, this method can perform comprehensive rust removal and polishing on the inner wall of the bend, and has the advantages of good polishing effect, no pollution during operation, and compatibility with various pipe materials.

[0006] To achieve the above objectives, this application proposes a pipe inner wall rust removal device, including an abrasive blasting assembly, a mounting frame, a water-grinding nozzle, a nozzle support, and a nozzle control. The abrasive blasting assembly is connected to the water-grinding nozzle via a pipe. A support plate is mounted on the mounting frame, and the support plate is equipped with two winding rollers, a synchronous drive, a pipe clamp, and a tensioning component. The two winding rollers are respectively connected to the synchronous drive, and the nozzle support and nozzle control are respectively connected to the rope wound on the corresponding winding rollers. The tensioning component abuts against the rope. The water-grinding nozzle is mounted on the nozzle support, and the nozzle support and nozzle control are connected via a retraction rope. The nozzle support includes a pressure sensor and a pressure transmitter. The pressure sensor detects the bending position of the pipe, and the pressure transmitter detects the bending length of the pipe. The nozzle control controls the retraction of the retraction rope and drives the water-grinding nozzle to reciprocate at the bending point of the pipe.

[0007] In addition, the pipe inner wall rust removal device proposed in this application may also have the following additional technical features: In one embodiment of this application, the nozzle support further includes a fixed block and a plurality of elastic supports, wherein the fixed block is connected to the nozzle control component via a retraction rope; the plurality of elastic supports are respectively disposed on the fixed block; the elastic supports include a fixed cylinder, a telescopic cylinder and a spring, wherein the fixed cylinder is disposed on the fixed block; the telescopic cylinder is sleeved on the fixed cylinder and is provided with ball bearings; the spring is sleeved on the fixed cylinder and connected to the telescopic cylinder; a pressure sensor and a pressure transmitter are respectively disposed inside the telescopic cylinder and abut against the fixed cylinder.

[0008] In one embodiment of this application, the nozzle control component includes a control cylinder, a take-up and release motor, an abutment limiting member, and multiple elastic support members. The take-up and release motor is disposed inside the control cylinder, and a take-up and release shaft is disposed on the output shaft of the take-up and release motor. One end of the retractable rope is wound around the take-up and release shaft. The abutment limiting member is disposed on the control cylinder. Multiple elastic support members are respectively disposed on the control cylinder.

[0009] In one embodiment of this application, the abutment limiting member includes an electric telescopic rod and a limiting block, wherein the electric telescopic rod is disposed on the control cylinder; and the limiting block is disposed on the extension shaft of the electric telescopic rod.

[0010] In one embodiment of this application, the synchronous drive component includes a drive motor, a transmission chain, and two sprockets, wherein the drive motor is mounted on a support plate; the two sprockets are respectively rotatably mounted on the support plate and respectively connected to corresponding winding rollers; and the ends of the transmission chain are respectively sleeved with corresponding transmission chains.

[0011] In one embodiment of this application, the pipe clamp includes a first clamping plate, a second clamping plate, and a fastening bolt, wherein the first clamping plate is fixedly mounted on a support plate; the second clamping plate is slidably mounted on the support plate; and the fastening bolt passes through the second clamping plate and is threadedly connected to the first clamping plate.

[0012] In one embodiment of this application, the tensioning member includes a fixed plate, an elastic telescopic rod, and a roller shaft, wherein the fixed plate is disposed on a support plate; the elastic telescopic rod is disposed on the fixed plate; the roller shaft is rotatably disposed on the extension shaft of the elastic telescopic rod; and the roller shaft abuts against the rope.

[0013] In one embodiment of this application, the abrasive jetting assembly includes a water tank, a water pump, and an abrasive storage tank. One end of the water pump is connected to the water tank via a pipe; the other end of the water pump is connected to the water jetting nozzle via a delivery pipe; the abrasive storage tank is disposed on the water tank, and the bottom of the abrasive storage tank is connected to the delivery pipe.

[0014] The beneficial effects of this application are as follows: By mixing water and abrasive, the inner wall of the pipe is derusted and polished. This method is suitable for pipes of different materials, and the abrasive does not magnetically adhere to the inner wall of the pipe. In addition, by setting a rope on the nozzle control and nozzle support components, and connecting the nozzle control and nozzle support components with a retractable rope, the water-grinding nozzle can grind the bent pipe by winding and unwinding the rope. The retractable rope is wound and unwinded by a motor, allowing the water-grinding nozzle to reciprocate to derust and polish the bent part of the pipe, ensuring the derusting and polishing effect on the bent part.

[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of a pipe inner wall rust removal device according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a synchronization drive according to an embodiment of this application; Figure 3 This is a schematic diagram of the installation structure of the nozzle support, retraction rope, and nozzle control according to an embodiment of this application; Figure 4 This is a schematic diagram of the installation structure of a water mill nozzle and a fixing block according to an embodiment of this application; Figure 5 This is a cross-sectional structural schematic diagram of an elastic support member according to an embodiment of this application; Figure 6 This is a schematic diagram of the installation structure of the retractable rope and the take-up and release shaft according to an embodiment of this application; Figure 7 This is a schematic diagram of the structure of a water mill nozzle according to an embodiment of this application; Figure 8 This is a schematic diagram of the structure of another water mill nozzle according to one embodiment of this application.

[0017] As shown in the figure: 1. Abrasive jetting assembly; 10. Water tank; 11. Water pump; 110. Conveying pipe; 12. Abrasive storage tank; 2. Mounting frame; 20. Support plate; 21. Winding roller; 210. Rope; 22. Synchronous drive component; 220. Drive motor; 221. Transmission chain; 222. Sprocket; 23. Pipe clamp; 230. First clamping plate; 231. Second clamping plate; 232. Fastening bolt; 24. Tensioning component; 240. Fixing plate; 241. 1. Elastic telescopic rod; 2.42. Roller shaft; 3. Water-milled nozzle; 4. Nozzle support; 40. Fixing block; 41. Elastic support; 410. Fixing cylinder; 411. Telescopic cylinder; 4110. Ball bearing; 412. Spring; 42. Pressure sensor; 43. Pressure transmitter; 5. Retraction rope; 6. Nozzle control component; 60. Control cylinder; 61. Retractor / discharge motor; 610. Retractor / discharge shaft; 62. Abutment limit component; 620. Electric telescopic rod; 621. Limiting block. Detailed Implementation

[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0019] The pipe inner wall rust removal device of this application embodiment is described below with reference to the accompanying drawings.

[0020] like Figures 1-8 As shown, the pipe inner wall rust removal device of this application embodiment may include an abrasive spraying assembly 1, a mounting frame 2, a water grinding nozzle 3, a nozzle support 4, and a nozzle control component 6.

[0021] The abrasive jetting assembly 1 is connected to the water mill nozzle 3 via a pipe.

[0022] It should be noted that the abrasive jetting component 1 described in this embodiment jets water and abrasive in a mixed state, wherein the concentration of abrasive is 5%-15%, and the mesh size of the abrasive is selected according to the process requirements. For example, if fine grinding and rust removal are required, garnet abrasive with a mesh size of 320-600 can be used.

[0023] A support plate 20 is installed on the mounting frame 2.

[0024] As a possible scenario, the mounting frame 2 is configured as a cylinder and has a slide rail. The support plate 20 is mounted on the cylindrical mounting frame 2 and is slidably connected to the slide rail. This allows for adjustment of the pipe's condition when dealing with pipes with more complex bends, ensuring that the abrasive material is discharged from the pipe.

[0025] The support plate 20 is provided with two winding rollers 21, a synchronous drive component 22, a tube clamping component 23 and a tensioning component 24.

[0026] Among them, the two winding rollers 21 are respectively connected to the synchronous drive component 22, and the nozzle support component 4 and the nozzle control component 6 are respectively connected to the rope 210 wound on the corresponding winding rollers 21.

[0027] For example, the synchronous drive 22 rotates, causing one of the winding rollers 21 to rotate clockwise, and causing the other winding roller 21 to rotate clockwise synchronously. In addition, the two winding rollers 21 are located at the ends of the support plate 20 respectively.

[0028] The tensioner 24 abuts against the rope 210.

[0029] It should be noted that the extension length of the tensioner 24 when it comes into contact with the rope 210 as described in this embodiment can be adjusted according to the actual situation, and is not limited here.

[0030] The water-jet nozzle 3 is mounted on the nozzle support 4, and the nozzle support 4 is connected to the nozzle control component 6 via a retractable rope 5.

[0031] It should be noted that the water mill nozzle 3 described in this embodiment has multiple sets of spray nozzles (such as...). Figure 7 As shown in the figure, each group of spray nozzles is circumferentially arranged on the water grinding nozzle 3, and each group of spray nozzles is staggered to achieve the effect of water grinding to remove rust and polish the inner wall of the pipe.

[0032] As one possible scenario, the water mill nozzle 3 can be configured as a rotating nozzle, with a motor (e.g., [unclear]) mounted on the nozzle support 4. Figure 8 As shown in the figure, the motor drives the water grinding nozzle 3 to rotate, thereby achieving the effect of water grinding to remove rust and polish the inner wall of the pipe.

[0033] The nozzle support 4 may include a pressure sensor 42 and a pressure transmitter 43. The pressure sensor 42 is used to detect the bending position of the pipe, and the pressure transmitter 43 is used to detect the bending length of the pipe.

[0034] For example, the pressure sensor 42 is used to detect the bending position of the pipe, meaning that the synchronous drive 22 drives the winding roller 21 to rotate, and drives the rope 210, the nozzle support 4 and the nozzle control 6 to move inside the pipe, with the bottom end (such as...) Figure 1 When the support plate 20 shown is in a vertical state, the winding roller 21 pulls the nozzle support 4 to move in the curved part of the pipe. When the pulling direction deviates, the pressure sensor 42 in the nozzle support 4 transmits the pressure change to the controller (not shown in the figure) wirelessly. The controller then determines that the water mill nozzle 3 is in the curved part of the pipe.

[0035] For example, when the pressure transmitter 43 is used to detect the bending length of the pipe, the pressure transmitter 43 also changes when the pressure sensor 42 detects a change in pressure, sends a signal to the controller, and records the duration within the pressure range (determined according to the actual situation of the pipe). The controller then determines the bending length of the pipe at that point based on the rotation speed of the synchronous drive 22.

[0036] The nozzle control component 6 is used to control the contraction of the retraction rope 5 and drive the water jet nozzle 3 to move back and forth at the bend of the pipe.

[0037] Understandably, the nozzle control component 6 controls the retraction of the retraction rope 5, and drives the nozzle support component 4 and the water polishing nozzle 3 to move back and forth inside the square tube, thereby performing multiple rust removal and polishing processes on the bent part of the pipe to ensure the rust removal and polishing effect of the bent part.

[0038] Specifically, in actual operation, the relevant personnel fix the bent pipe to the clamp 23, pass the rope 210 on the nozzle control 6 through the pipe and fix it to one of the winding rollers 21, and at this time the rope 210 is under a certain tension. The relevant personnel insert the water grinding nozzle 3 and the nozzle support 4 into the pipe, start the device, and the controller (not shown in the figure) controls the abrasive spraying assembly 1 to spray the mixture of water and abrasive from the water grinding nozzle 3 and perform rust removal and polishing on the inner tube of the pipe.

[0039] Simultaneously, the controller controls the synchronous drive 22 to operate, which in turn controls the two winding rollers 21 to rotate synchronously in the same direction. This causes the winding and unwinding of the wire rope 210 to move the nozzle support 4 and nozzle control 6 at a constant speed within the tube. Meanwhile, the tensioning member 24 continuously extends and tensions the wire. When the nozzle support 4 moves to the curved section of the tube, the pressure sensor 42 inside the nozzle support 4 detects the pressure change and transmits the signal to the controller. Additionally, the pressure transmitter 43 detects pressure changes within a specified range (the specific range depends on the actual situation). The duration of the test (adjustment is made for each batch of pipes, which is not limited here) is recorded and the signal is transmitted to the controller. The controller records the pressure change detected by the pressure sensor 42 and determines the length of the bent part of the pipe based on the duration of the test within the range detected by the pressure transmitter 43 and the number of revolutions of the synchronous drive 22 (each revolution corresponds to the same driving distance). (That is, the length of the bent part can be obtained by multiplying the time of the pressure transmitter 43 by the number of revolutions of the synchronous drive 22 and the distance of rotation per revolution.)

[0040] After the nozzle support 4 moves out to the curved section (at this time, the nozzle support 4 is behind the curved section, and the length of the retraction rope 5 between the nozzle support 4 and the nozzle control 6 is adjusted according to the actual situation), after knowing the length, the controller controls the synchronous drive 22 to stop running, controls the nozzle control 6 to limit and abut against the pipe at this position, and controls the nozzle control 6 to wind up the retraction rope 5. The tightening of the retraction rope 5 drives the rope 210 on the nozzle support 4 to tighten, abut against the tensioner 24, and causes the tensioner 24 to contract, so that the nozzle support 4 reworks and grinds the curved section of the pipe. After grinding is completed, the controller controls the nozzle control 6 to release the retraction rope 5, and the rope 210 on the nozzle support 4 is extended and abutted by the tensioner 24, driving the water grinding nozzle 3 and the nozzle support 4 to return to the previous grinding position. The controller controls the synchronous drive 22 to continue to work and continue to grind other parts of the pipe, thus completing the grinding of the curved pipe.

[0041] In one embodiment of this application, such as Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the nozzle support 4 may further include a fixed block 40 and multiple elastic support members 41. The fixed block 40 is connected to the nozzle control member 6 via a retraction rope 5. The multiple elastic support members 41 are respectively disposed on the fixed block 40. Each elastic support member 41 may include a fixed cylinder 410, a telescopic cylinder 411, and a spring 412. The fixed cylinder 410 is disposed on the fixed block 40. The telescopic cylinder 411 is sleeved on the fixed cylinder 410 and is provided with ball bearings 4110. The spring 412 is sleeved on the fixed cylinder 410 and is connected to the telescopic cylinder 411. The pressure sensor 42 and the pressure transmitter 43 are respectively disposed inside the telescopic cylinder 411 and abut against the fixed cylinder 410.

[0042] Understandably, the fixing block 40 is connected to the control cylinder 60 in the nozzle control component 6 via the retraction rope 5.

[0043] In this embodiment, a plurality of elastic supports 41 are used to support the water mill nozzle 3. The number of elastic supports 41 is at least three, and the arrangement angle and position are not limited. In addition, the multiple elastic supports 41 can be arranged into two groups as needed to ensure the stability of the water mill nozzle 3 in the pipe.

[0044] In one embodiment of this application, such as Figure 1 , Figure 3 and Figure 6 As shown, the nozzle control component 6 may include a control cylinder 60, a receiver / discharger 61, an abutment limiting component 62, and multiple elastic support components 41.

[0045] The receiver 61 is installed inside the control cylinder 60. The output shaft of the receiver 61 is equipped with a take-up and release shaft 610. One end of the retractable rope 5 is wound around the take-up and release shaft 610. The abutment limiter 62 is installed on the control cylinder 60. Multiple elastic support members 41 are respectively installed on the control cylinder 60.

[0046] It is understandable that the elastic support 41 in the nozzle control component 6 and the elastic support 41 in the nozzle support component 4 have the same structure, and will not be described in detail here.

[0047] In one embodiment of this application, such as Figure 4 As shown, the abutment limiting member 62 may include an electric telescopic rod 620 and a limiting block 621.

[0048] The electric telescopic rod 620 is mounted on the control cylinder 60, and the limiting block 621 is mounted on the extension shaft of the electric telescopic rod 620.

[0049] It should be noted that the limiting block 621 described in this embodiment is provided with a friction pad, which ensures the fixing effect of the pipe while preventing scratches on the inner wall of the pipe.

[0050] In one embodiment of this application, such as Figure 1 and Figure 2 As shown, the synchronous drive unit 22 may include a drive motor 220, a transmission chain 221, and two sprockets 222.

[0051] The drive motor 220 is mounted on the support plate 20, and the two sprockets 222 are rotatably mounted on the support plate 20 and connected to the corresponding winding rollers 21 respectively. The ends of the transmission chains 221 are respectively sleeved with the corresponding transmission chains 221.

[0052] It is understandable that by using the synchronous drive component 22 to drive the two winding rollers 21 to rotate synchronously and cooperating with the take-up and discharge motor 61, the process accuracy of this device can be reduced. For example, if two motors are used instead of two sprockets 222 to drive the corresponding winding rollers 21, it is necessary to ensure the synchronization status and synchronization accuracy of the two motors, and the installation, debugging and maintenance steps can be reduced.

[0053] It should be noted that both the drive motor 220 and the receiver / discharger 61 described in this embodiment have a self-locking function.

[0054] In one embodiment of this application, such as Figure 1 As shown, the pipe clamp 23 may include a first clamping plate 230, a second clamping plate 231, and a fastening bolt 232.

[0055] The first clamping plate 230 is fixedly mounted on the support plate 20, the second clamping plate 231 is slidably mounted on the support plate 20, and the fastening bolt 232 passes through the second clamping plate 231 and is threadedly connected to the first clamping plate 230.

[0056] It is understandable that the pipe is placed between the first clamping plate 230 and the second clamping plate 231, and the second clamping plate 231 is clamped and pushed by the fastening bolt 232 to clamp the pipe.

[0057] In one embodiment of this application, such as Figure 1 As shown, the tensioning member 24 may include a fixed plate 240, an elastic telescopic rod 241, and a roller 242.

[0058] The fixed plate 240 is mounted on the support plate 20, the elastic telescopic rod 241 is mounted on the fixed plate 240, and the roller shaft 242 is rotatably mounted on the extension shaft of the elastic telescopic rod 241. The roller shaft 242 abuts against the rope 210.

[0059] It should be noted that the tensioning member 24 described in this embodiment is selected from the elastic telescopic rod 241 with the corresponding elastic deformation force according to the actual situation, and there is no limitation here.

[0060] In one embodiment of this application, such as Figure 1 As shown, the abrasive jetting assembly 1 may include a water tank 10, a water pump 11, and an abrasive storage tank 12.

[0061] One end of the water pump 11 is connected to the water tank 10 through a pipe, and the other end of the water pump 11 is connected to the water mill nozzle 3 through a conveying pipe 110. The abrasive storage tank 12 is installed on the water tank 10, and the bottom of the abrasive storage tank 12 is connected to the conveying pipe 110.

[0062] It should be noted that the abrasive storage tank 12 described in this embodiment can be fed into the conveying pipe 110 by gravity feeding or by air feeding from an air compressor (not shown in the figure). In addition, the abrasive concentration is controlled as follows: 80-120 mesh for coarse polishing, 150-240 mesh for medium polishing, and 320-600 mesh for fine polishing, with an abrasive concentration of 5%-15%.

[0063] Specifically, in actual operation, the relevant personnel fix the bent pipe between the first clamping plate 230 and the second clamping plate 231, pass the rope 210 on the nozzle control component 6 through the pipe (the end of the rope 210 can be tied with a traction ball to facilitate the smooth passage of the rope 210 through the bent pipe), and fix it on one of the winding rollers 21. At this time, the rope 210 is under a certain tension. The relevant personnel insert the water grinding nozzle 3 and the nozzle support component 4 into the pipe (the end part can be sprayed and polished before insertion). Start the device, and the controller (not shown in the figure) controls the water pump 11 to draw water from the water tank 10 and take away the abrasive in the abrasive storage tank 12. The mixture of water and abrasive is sprayed out from the water grinding nozzle 3 and the inner tube of the pipe is derusted and polished.

[0064] Simultaneously, the controller controls the drive motor 220 to operate, which in turn drives the corresponding sprocket 222 and transmission chain 221 to rotate, causing the two sprockets 222 to rotate synchronously and simultaneously control the two winding rollers 21 to rotate in the same direction. This causes one winding roller 21 to wind the rope 210 while the other winding roller 21 unwinds the rope 210, and drives the nozzle support 4 and nozzle control 6 to move at a constant speed inside the tube. Meanwhile, the roller shaft 242 on the elastic telescopic rod 241 continuously extends and tensions the rope. When the nozzle support 4 moves to the curved section of the tube, the pressure sensor 42 inside the nozzle support 4 detects the pressure change and transmits the signal to the controller. In addition, the pressure transmitter 43 will detect the duration of pressure change within the range (the specific range is adjusted according to the experiment and each batch of pipes, and is not limited here) and transmit the signal to the controller. The controller records the pressure change detected by the pressure sensor 42, and comprehensively judges the length of the bent part of the pipe based on the duration of the pressure change within the range detected by the pressure transmitter 43, and based on the number of turns of the winding roller 21 driven by the drive motor 220 at a constant speed (each turn of the winding roller 21 corresponds to the same driving distance). (That is, the length of the bent part can be obtained by multiplying the time of the pressure transmitter 43 by the number of turns of the winding roller 21 and the distance of rotation per turn.)

[0065] After the nozzle support 4 is moved out to the curved section (at this time, the nozzle support 4 is behind the curved section, and the length of the retraction rope 5 between the nozzle support 4 and the nozzle control component 6 is adjusted according to the actual situation), once the length is known, the controller controls the drive motor 220 to stop running, controls the electric telescopic rod 620 to extend, and drives the limit block 621 to abut against the pipe wall at this position, and controls the retractor 61 to wind up the retraction rope 5. The retraction rope 5 is tightened, driving the rope 2 on the nozzle support 4. 10. Tighten and abut against roller 242, causing elastic telescopic rod 241 to retract, causing nozzle support 4 to rework and grind the bent part of the pipe. After grinding, the controller controls the retractor 61 to release the retracting rope 5. The rope 210 on nozzle support 4 is extended and abutted by elastic telescopic rod 241, driving the water grinding nozzle 3 and nozzle support 4 back to the previous grinding position. The controller controls the synchronous drive 22 to continue to work and continue to grind other parts of the pipe, thus completing the grinding of the bent pipe.

[0066] In summary, the pipe inner wall rust removal device of this application embodiment adopts a water-jet polishing method, controlling the nozzle to move inside the bend and perform spray polishing, which can achieve precise rust removal and polishing treatment on the bending part of the bend, effectively improving the overall polishing effect of the bend. In addition, this method can perform comprehensive rust removal and polishing on the inner wall of the bend, and has the advantages of good polishing effect, no pollution during operation, and compatibility with various pipe materials.

[0067] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0069] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A rust removal device for the inner wall of pipes, characterized in that, This includes an abrasive blasting assembly, mounting frame, water jet nozzle, nozzle support, and nozzle control components. The abrasive jetting assembly is connected to the water mill nozzle via a pipe; A support plate is provided on the mounting frame, and the support plate is equipped with two winding rollers, a synchronous drive component, a tube clamping component, and a tensioning component. The two winding rollers are respectively connected to the synchronous drive component, and the nozzle support and the nozzle control component are respectively connected to the rope wound on the corresponding winding rollers. The tensioning element abuts against the rope; The water mill nozzle is mounted on the nozzle support, and the nozzle support is connected to the nozzle control via a retractable rope. The nozzle support includes a pressure sensor and a pressure transmitter. The pressure sensor is used to detect the bending position of the pipe, and the pressure transmitter is used to detect the bending length of the pipe. The nozzle control component is used to control the contraction of the retractable rope and drive the water mill nozzle to reciprocate at the bend of the pipe.

2. The pipe inner wall rust removal device according to claim 1, characterized in that, The nozzle support also includes a fixing block and multiple elastic support members, wherein, The fixing block is connected to the nozzle control component via the retraction rope; Multiple elastic support members are respectively disposed on the fixed block; The elastic support component includes a fixed cylinder, a telescopic cylinder, and a spring, wherein, The fixing cylinder is disposed on the fixing block; The telescopic cylinder is sleeved on the fixed cylinder, and the fixed cylinder is provided with ball bearings; The spring is sleeved on the fixed cylinder and connected to the telescopic cylinder; The pressure sensor and the pressure transmitter are respectively installed inside the telescopic cylinder and abut against the fixed cylinder.

3. The pipe inner wall rust removal device according to claim 1, characterized in that, The nozzle control component includes a control cylinder, a discharge motor, an abutment limiting component, and multiple elastic support components, wherein... The take-up and release motor is installed inside the control cylinder, and a take-up and release shaft is provided on the output shaft of the take-up and release motor. One end of the retractable rope is wound around the take-up and release shaft. The abutment limiting member is disposed on the control cylinder; Multiple elastic support members are respectively disposed on the control cylinder.

4. The pipe inner wall rust removal device according to claim 3, characterized in that, The abutment limiting component includes an electric telescopic rod and a limiting block, wherein... The electric telescopic rod is mounted on the control cylinder; The limiting block is mounted on the extension shaft of the electric telescopic rod.

5. The pipe inner wall rust removal device according to claim 1, characterized in that, The synchronous drive component includes a drive motor, a transmission chain, and two sprockets, wherein... The drive motor is mounted on the support plate; The two sprockets are respectively rotatably mounted on the support plate and are respectively connected to the corresponding winding rollers; The ends of the transmission chain are respectively sleeved with the corresponding transmission chain.

6. The pipe inner wall rust removal device according to claim 1, characterized in that, The pipe clamping component includes a first clamping plate, a second clamping plate, and fastening bolts, wherein, The first clamping plate is fixedly mounted on the support plate; The second clamping plate is slidably mounted on the support plate; The fastening bolt passes through the second clamping plate and is threadedly connected to the first clamping plate.

7. The pipe inner wall rust removal device according to claim 1, characterized in that, The tensioning component includes a fixed plate, an elastic telescopic rod, and a roller shaft, wherein... The fixing plate is disposed on the support plate; The elastic telescopic rod is mounted on the fixed plate; The roller is rotatably mounted on the extension shaft of the elastic telescopic rod; The roller abuts against the rope.

8. The pipe inner wall rust removal device according to claim 1, characterized in that, The abrasive jetting assembly includes a water tank, a water pump, and an abrasive storage tank, wherein, One end of the water pump is connected to the water tank via a pipe; The other end of the water pump is connected to the water mill nozzle via a delivery pipe; The abrasive storage tank is mounted on the water tank, and the bottom of the abrasive storage tank is connected to the conveying pipeline.

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