Surface coating treatment process and device for double-alloy sounding pipe

Abstract

The invention discloses a surface coating treatment process and device for a double-alloy sounding pipe. The process comprises the steps of pretreatment, clamping and positioning and shot blasting treatment, specifically, a plastic cycle strain layer is formed through high-speed shot flow impact, fatigue fracture and stress corrosion resistance are improved through grain refinement, dislocation density increase and a residual compressive stress field, and cleaning and drying are conducted. The device comprises a shot blasting machine body, a shot blasting pipe body, a shot circulating system and a recovery dust removal system, a rotating mechanism is arranged in the shot blasting pipe body, a servo motor drives a first hollow gear to drive a sounding pipe to revolve, a gear motor drives a third hollow gear to enable the sounding pipe to rotate, and an air cylinder drives a clamping plate to stably clamp pipes of different specifications. The reliability and durability of the sounding pipe are improved through shot blasting double reinforcement, the treatment uniformity is guaranteed through the rotating mechanism, the shot circulating and filtering cleaning system saves resources, is environmentally friendly and efficient, and the surface coating treatment quality is overall improved.

Description

Technical Field

[0001] This invention relates to the field of coating treatment for acoustic logging pipes, and in particular to a surface coating treatment process and apparatus for dual alloy acoustic logging pipes. Background Technology

[0002] As a key component used to transmit acoustic signals in pile foundation testing, the surface properties of sonic logging tubes directly affect the accuracy of the test results and their service life. Surface coating treatment is an important step to improve their corrosion resistance, wear resistance and subsequent reliability.

[0003] Existing surface treatment processes for sonic logging pipes have several shortcomings: First, traditional methods struggle to effectively form a plastic cyclic strain layer with residual compressive stress on the pipe surface, resulting in weak resistance to fatigue fracture and stress corrosion (including hydrogen embrittlement), thus requiring improved reliability and durability. Second, inadequate shot blasting space design and imperfect shot-sand separation and recycling mechanisms lead to shot-sand mixing with impurities, resulting in significant material waste. Furthermore, the dust and impurities generated during the process lack effective collection and treatment. The methods used have a significant impact on the environment; thirdly, the rotation method of the sonic logging tube is singular, relying on rotation in only one direction, which easily leads to uneven surface treatment, dead corners, poor surface roughness consistency, and the clamping mechanism has weak adaptability, making it difficult to firmly fix sonic logging tubes of different specifications, and the effect is easily affected by shaking during the treatment process; fourthly, the oil stains are not thoroughly removed in the pretreatment stage, the clamping and positioning operation is not convenient enough, the coordination of various components in shot blasting is poor, water resources are wasted in the cleaning process and the residue is not thoroughly treated, and insufficient drying affects the adhesion of concrete. The overall treatment quality and reliability need to be improved. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application provides a surface coating process and apparatus for dual-alloy acoustic logging tubes.

[0005] Technical solution: A surface coating treatment process for a dual-alloy acoustic logging tube, characterized by comprising:

[0006] S1. Preprocessing:

[0007] Compressed air and a soft brush are used to clean the surface of the CPVC-ASA alloy acoustic logging pipe to remove surface dust and particulate impurities;

[0008] S2. Clamping and positioning:

[0009] Insert the sonic logging tube into the interior of the third hollow gear, start the cylinder to drive the clamping plate to move, and clamp and fix the sonic logging tube. The clamping force of the cylinder-driven clamping plate is controllable, which can ensure that the sonic logging tube does not shift during the shot blasting process, and avoid deformation of the sonic logging tube due to excessive clamping, thus ensuring the dimensional accuracy of the sonic logging tube after treatment.

[0010] S3. Shot blasting treatment:

[0011] The gas source treatment triple unit, bucket elevator and shot storage tank are started to carry out shot blasting operation on the sonic logging tube in the inner cavity of the shot blasting tube. Specifically, the shot blasting operation of the sonic logging tube uses a high-speed moving shot flow to impact the surface of the sonic logging tube to ensure that the surface of the sonic logging tube generates a plastic cyclic strain layer due to the kinetic energy transfer of the shot, so as to achieve grain refinement, dislocation density increase and substructure strengthening. At the same time, a residual compressive stress field is formed on the surface layer to improve the dual strengthening mechanism of fatigue fracture resistance and hydrogen embrittlement stress corrosion fracture resistance of the sonic logging tube.

[0012] The coordinated operation of various devices can ensure that the projectiles act continuously and stably on the surface of the sonic logging pipe. The high-speed impact of the projectiles removes impurities such as old coatings and oxide scale, while creating a certain roughness on the surface, which is beneficial for the adhesion of concrete.

[0013] S4. Cleaning and drying process:

[0014] The shot-blasted sonic logging pipe is sent into a cleaning tank, which is equipped with primary, medium, and high-efficiency filters arranged in sequence. Water filtered through multiple layers of filters is pumped to nozzles to clean the surface of the sonic logging pipe. The cleaned water is then returned to the cleaning tank for reuse. The multiple layers of filters remove impurities from the water step by step, ensuring the cleanliness of the cleaning water. This recycling mode significantly saves water resources and reduces processing costs. After cleaning, the sonic logging pipe is dried using a high-speed air knife. This method quickly removes moisture from the surface of the sonic logging pipe, preventing secondary corrosion caused by residual moisture and providing a dry surface for concrete construction.

[0015] Preferably, in step S1, the pretreatment involves cleaning the surface with compressed air and a soft brush. The core of the first step in the pretreatment of the CPVC-ASA alloy material acoustic pipe surface is to remove surface contaminants (such as dust, oil, and release agents) and optimize the surface condition to enhance coating adhesion. The specific process is as follows:

[0016] First, dust is removed by blowing with compressed air and cleaning with soft brushes;

[0017] Then use mild solvents such as isopropanol or low-concentration alkaline solutions to remove oil and grease, and if necessary, supplement with ultrasonic cleaning;

[0018] The surface is then roughened by sanding with 400-600 grit sandpaper or by sandblasting with glass microspheres, and can be activated by plasma treatment or other methods.

[0019] Preferably, in the S3, the shot flow of the shot blasting treatment is steel shot, the speed of the shot flow is 50-80 m / s, and the shot blasting treatment time is 3-8 minutes. The steel shot has high hardness and good wear resistance, and can effectively remove the surface coating and impurities. The speed range of 50-80 m / s can ensure the removal effect while avoiding damage to the sonde body caused by high speed. The treatment time of 3-8 minutes can be flexibly adjusted according to the degree of surface contamination to ensure efficient treatment while achieving ideal surface cleanliness and roughness.

[0020] Preferably, in the S4, the drying treatment adopts high-speed air knife drying, and the drying time is 2-5 minutes. This can ensure that sonde tubes of different wall thicknesses can be completely dried, avoiding rusting caused by local dampness.

[0021] The surface coating treatment device for the double-alloy sonde for realizing the surface coating treatment process of the double-alloy sonde includes a shot blasting machine body, a shot blasting pipe body, and a shot recycling system. The shot blasting pipe body is connected to both sides of the shot blasting machine body. The shot recycling system is arranged on the back of the shot blasting machine body. The inner cavity of the shot blasting pipe body is provided with a sand blasting cavity. The sand blasting cavity provides a closed and concentrated space for the shot blasting treatment of the sonde surface, avoiding energy loss caused by the splashing of the shot, and improving the shot blasting efficiency.

[0022] The exhaust end of the shot blasting machine body is connected to a shot and sand separator. The shot and sand separator can separate the mixed shot and impurities such as sand particles and coating debris after the shot blasting, so that qualified shot can re-enter the recycling system, reducing shot waste. The shot and sand separator is connected and arranged at the top of the shot blasting pipe body. The top of the shot recycling system is connected and arranged with a shot storage cabin.

[0023] The shot storage cabin can pre-store sufficient shot to ensure the continuity of the shot blasting operation and avoid downtime caused by frequent addition of shot. The back of the shot blasting machine body is provided with a recycling and dust removal system. On the one hand, the recycling and dust removal system can recycle the scattered shot to supplement the recycling system. On the other hand, the recycling and dust removal system can adsorb the dust generated during the treatment process, improve the working environment, and reduce air pollution. The inner cavity of the shot blasting pipe body is provided with a rotating mechanism.

[0024] The rotating mechanism includes a first hollow gear. The first hollow gear is connected to the inner cavity of the shot blasting pipe body through a first bearing. The outer part of the first hollow gear is meshingly connected with a second gear. The back of the second gear is provided with a servo motor. The servo motor drives the second gear to rotate the first hollow gear, which can realize the circumferential rotation of the sonde in the shot blasting pipe body, ensuring that each side of the sonde can be uniformly shot blasted.

[0025] The inner cavity of the first hollow gear is connected with a chuck, the inner cavity of the chuck is provided with a supporting mechanism, the supporting mechanism comprises a fixed disc connected with the chuck, the inner cavity of the fixed disc is uniformly provided with a third hollow gear through a bearing, the inner cavity of the third hollow gear is provided with a clamping plate through an air cylinder, the air cylinder drives the clamping plate to flexibly clamp the acoustic pipe with different diameters, so as to ensure the clamping stability and avoid the shaking of the acoustic pipe during the shot blasting to affect the processing accuracy.

[0026] The outer part of the third hollow gear is meshed with a fourth gear, the front surface of the fourth gear is provided with a speed reducer motor, the speed reducer motor drives the third hollow gear to rotate through the fourth gear, drives the acoustic pipe to rotate by itself, cooperates with the circumferential rotation of the rotating mechanism, and realizes the 360° dead angle-free shot blasting treatment of the surface of the acoustic pipe.

[0027] Preferably, the both sides of the shot blasting machine body are connected with a vibration rack, the top of the vibration rack is provided with a vibration motor, the vibration rack comprises a rack, the top of the rack is connected with a bearing plate through a spring, the bearing plate is connected with the vibration rack, the top of the bearing plate is connected with the bottom of the shot blasting pipe body through a connecting arm, the vibration motor drives the vibration rack to vibrate, and the vibration is transmitted to the shot blasting pipe body through the bearing plate and the connecting arm, so that the pellets in the pipe body are more uniformly distributed, the pellet accumulation phenomenon is reduced, the impact force of the pellets on the surface of the acoustic pipe is enhanced, and the shot blasting effect is improved.

[0028] Preferably, the bottom of the shot blasting machine body is connected with an air source treatment triple joint through a short pipe, the bottom of the air source treatment triple joint is provided with a supporting base, the air source treatment triple joint can filter, pressure regulate and lubricate the input compressed air, so as to ensure the stability of the air pressure during the shot blasting, reduce the problem of uneven shot blasting force caused by air pressure fluctuation, and prolong the service life of the pneumatic element.

[0029] Preferably, the top of the pellet storage cabin is provided with a warehouse door through a hinge, a buckle is arranged between the warehouse door and the pellet storage cabin, the warehouse door is convenient for adding pellets into the storage cabin, and the buckle can ensure the sealing property after the warehouse door is closed, prevent external dust and moisture from entering the storage cabin to pollute the pellets, and ensure the cleanliness of the pellets.

[0030] Preferably, the outside of the servo motor is connected with a motor rack through a rubber pad, the outside of the motor rack is connected with the outside of the shot blasting pipe body through bolts, the rubber pad can effectively absorb the vibration and noise generated during the operation of the servo motor, the motor rack is fixed through the bolts, so as to ensure the stable installation of the motor, avoid the influence of the shaking of the motor on the gear meshing accuracy, and ensure the stable operation of the rotating mechanism.

[0031] Preferably, the exterior of the speed reducer motor is provided with a star frame, the exterior of the star frame is provided on the exterior of the fixed disc through bolts, the star frame can uniformly disperse the weight of the speed reducer motor to the fixed disc, enhance the stability of the motor installation, reduce the vibration during operation, and ensure the accurate meshing of the fourth gear and the third hollow gear.

[0032] In summary, the present application provides a surface coating treatment process and device for a double-alloy acoustic measuring pipe, which has the following beneficial effects:

[0033] 1. The present application uses high-speed moving projectiles to impact the surface of the acoustic measuring pipe, which produces a plastic cyclic strain layer on the surface, thereby causing favorable changes in the microstructure of the layer and introducing a residual compressive stress field into the surface layer. The microstructure and residual compressive stress field of the surface layer are two strengthening factors that improve the fatigue fracture and stress corrosion (including hydrogen embrittlement) fracture resistance of acoustic measuring pipe parts, resulting in improved reliability and durability of the acoustic measuring pipe.

[0034] 2. The sandblasting cavity for throwing the inner cavity of the pipe provides a suitable space for the throwing operation, the shot and impurities are separated by the shot separator, and the shot recycling system and the shot storage cabin are used to realize the recycling of the shot, reduce material waste, and the recovery and dust removal system helps to collect impurities and dust generated during the processing process, reducing the impact on the environment.

[0035] 3. The first hollow gear driven by the servo motor can rotate the acoustic measuring pipe as a whole, and the third hollow gear driven by the speed reducer can rotate the acoustic measuring pipe itself. The combination of the two rotations makes the throwing operation more uniform, avoids the appearance of processing dead angles on the surface of the acoustic measuring pipe, and improves the consistency of the surface roughness. The clamping plate driven by the air cylinder in the supporting mechanism can stably clamp acoustic measuring pipes of different specifications to ensure the stability of the acoustic measuring pipe position during processing and reduce the impact of shaking on the processing effect.

[0036] 4. The pre-treatment uses compressed air and soft brushes to remove surface dust and particulate impurities, laying a good foundation for subsequent processing; the clamping and positioning step realizes fast and stable fixation through the air cylinder driven clamping plate, improving the operation convenience; the shot blasting processing step coordinates the operation of each component to ensure the orderly progress of the shot blasting operation; the cleaning step uses multi-layer filter cotton to filter the circulating water, which can effectively clean the surface residue after shot blasting and save water resources, and the high-speed air knife blowing ensures the dryness of the acoustic measuring pipe surface, which is beneficial to the adhesion of concrete, and improves the quality and reliability of the surface coating treatment of the acoustic measuring pipe as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is the front view of the present application;

[0038] Figure 2 is the plane view of the present application;

[0039] Figure 3 is an external schematic view of a support mechanism of the present application;

[0040] Figure 4 is an external schematic view of a rotating mechanism of the present application;

[0041] Figure 5 is an enlarged schematic view of a support mechanism of the present application;

[0042] Figure 6 is a structural schematic view of a sound tube product to be processed of the present application.

[0043] BRIEF DESCRIPTION OF DRAWINGS

[0044] 1, shot blasting machine body; 11, air source treatment triple joint; 2, shot blasting tube body; 21, vibration rack; 22, vibration motor; 3, shot circulating system; 31, bucket elevator; 32, shot and sand separator; 33, shot storage cabin; 34, recycling and dust removal system; 4, rotating mechanism; 41, first hollow gear; 42, first bearing; 43, second gear; 44, servo motor; 45, chuck; 5, support mechanism; 51, fixed disc; 52, third hollow gear; 53, clamping plate; 54, fourth gear; 55, speed reducer motor; 56, star rack; 6, sound tube product; 61, tube body surface. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0046] Embodiment 1

[0047] Process embodiment

[0048] The embodiment provides a surface coating treatment process for a double-alloy sound tube, and the specific steps are as follows:

[0049] S1, pretreatment:

[0050] First, dust removal is performed by compressed air blowing and soft brush cleaning; then, oil removal and degreasing are performed by using isopropyl alcohol and other mild solvents or low-concentration alkali solution; then, surface roughening is performed by grinding with 400-600 mesh sandpaper, and plasma treatment is selected for activation; at the same time, the temperature, pressure and reagent concentration are controlled to prevent damage to the substrate.

[0051] S2, clamping and positioning:

[0052] The pretreated sounding pipe is inserted into the inner cavity of the third hollow gear 52 which is uniformly arranged in the inner cavity of the fixed disc 51 through bearings, the fixed disc 51 is connected with the chuck 45, and the chuck 45 is connected with the first bearing 42 in the inner cavity of the shot blasting pipe body 2 through the first hollow gear 41. The cylinder 53 is started, the cylinder model is SC50x100, the stroke is 100mm, the clamping plate is driven, the clamping plate is in an arc structure, the surface is covered with a rubber anti-skid layer with a thickness of 5mm, and the clamping plate is moved, the clamping force is controlled through a cylinder pressure sensor with a measuring range of 0-100N and an accuracy of ±1N, the pressure range is 25-45N, the displacement of the sounding pipe during the shot blasting process is ensured, and the sounding pipe is prevented from being deformed due to too tight clamping, the deformation amount is ≤0.1mm, and the dimensional accuracy of the treated sounding pipe is ensured.

[0053] S3, shot blasting treatment:

[0054] The gas source treatment triplets 11 are started, the filtration precision is 5μm, the pressure regulating range is 0-0.8MPa, the lubrication mode is oil mist lubrication, the bucket elevator 31 has an elevating speed of 0.5m / s and a hopper capacity of 5L, and the projectile storage cabin 33 has a volume of 2m³ and pre-stores steel shots, the steel shots with a diameter of 1.0mm and a hardness of HRC55-60 are used as projectiles, the projectile flow speed is controlled to be 65-75m / s through gas source pressure adjustment, and the shot blasting time is 6 minutes, which can be adjusted to 5-8 minutes according to the surface contamination degree.

[0055] During the shot blasting process, the rotating mechanism 4 and the supporting mechanism 5 move coordinately:

[0056] The rotating mechanism 4: the servo motor 44, model MSMD042P1U, rated power 400W, drives the second gear 43, module 2, number of teeth 30, drives the first hollow gear 41, module 2, number of teeth 60, rotates, rotating speed 8r / min, makes the sounding pipe make circular motion in the shot blasting pipe body 2, motion radius 150mm, and ensures that each side surface can be covered by the projectiles.

[0057] The supporting mechanism 5: the reduction motor 55, model CV-5R, reduction ratio 10:1, drives the fourth gear 54, module 1.5, number of teeth 25, drives the third hollow gear 52, module 1.5, number of teeth 50, rotates, rotating speed 18r / min, realizes the rotation of the sounding pipe itself, the rotation direction is perpendicular to the circular motion direction, cooperates with the vibration of the vibration rack 21, and ensures that the projectiles uniformly cover the surface of the sounding pipe.

[0058] The vibrating frame 21 is composed of a frame, a spring with a stiffness coefficient of 500 N / mm, a load-bearing plate and a connecting arm. The load-bearing plate is connected to the bottom of the shot blasting pipe body 2 through the connecting arm. The vibrating motor 22 is a YZS-10-2 type motor with a power of 1.0 kW, which drives the vibrating frame 21 to vibrate at a frequency of 40 Hz and an amplitude of 2 mm. This makes the pellets more evenly distributed in the shot blasting pipe body 2, reduces the accumulation phenomenon, and at the same time enhances the impact force of the pellets on the surface of the sounding pipe, thereby improving the impact energy.

[0059] S4, cleaning and drying treatment:

[0060] The sounding pipe after shot blasting is sent to a cleaning tank with a size of 2000x1000x800mm. The cleaning tank is equipped with primary filter cotton with a pore size of 80μm made of glass fiber, medium filter cotton with a pore size of 30μm made of polyester fiber, and high-efficiency filter cotton with a pore size of 8μm made of PTFE. The filtered water is sent to a nozzle with a flow rate of 1.2L / min through a water pump with a flow rate of 20m³ / h and a lift of 15m. The nozzle is a 1 / 4MM type, and the cleaning pressure is 0.3MPa.

[0061] The cleaning and drying operations are performed simultaneously online. During operation, the sounding pipe is slowly transported forward, and the front is shot blasted while the rear is cleaned and dried online. The cleaned water is returned to the cleaning tank for recycling. The multi-layer filter cotton can remove impurities from the water step by step, ensuring that the cleaning water is clean and that the recycling mode can significantly save water resources and reduce processing costs.

[0062] After cleaning, high-speed air knives are used for drying, so that the sounding pipe can be completely dried, avoiding secondary corrosion caused by residual moisture, and providing dry surface conditions for concrete construction.

[0063] Example 2

[0064] Process example

[0065] This example provides another surface coating treatment process for a double-alloy sounding pipe. The specific steps are as follows:

[0066] S1, pretreatment:

[0067] First, dust removal is performed by compressed air blowing and soft brush cleaning. Then, isopropyl alcohol or low-concentration alkali solution is used for oil removal and degreasing, supplemented by ultrasonic cleaning. Subsequently, surface roughening is performed by glass bead blasting, and the surface of the CPVC-ASA alloy sounding pipe is cleaned and activated by plasma treatment to remove dust and particulate impurities.

[0068] S2, clamping and positioning:

[0069] The pretreated sounding pipe is inserted into the inner cavity of the third hollow gear 52 which is uniformly arranged in the inner cavity of the fixed disc 51 through a bearing, the fixed disc 51 is connected with the chuck 45, and the chuck 45 is connected with the first bearing 42 in the inner cavity of the shot blasting pipe body 2 through the first hollow gear 41. A hydraulic drive clamping plate is adopted, the clamping plate has a V-shaped structure, an anti-slip protrusion is arranged on the surface, the height of the protrusion is 2 mm, a hydraulic system pressure regulating valve is arranged, the range is 0-50 N, the accuracy is ±0.5 N, the clamping force is controlled, the pressure range is 35-50 N, the sounding pipe is fixed stably and is not deformed, and the deformation amount is less than or equal to 0.05 mm.

[0070] S3, shot blasting treatment:

[0071] The air source treatment triplets 11 are started, the filtration precision is 3 μm, the pressure regulating range is 0-1.0 MPa, the lubrication mode is trace lubrication, the screw conveyor has a conveying speed of 0.6 m / s, a screw diameter of 200 mm and a pitch of 150 mm, and the projectile storage cabin 33 has a volume of 3 m³ and pre-stores cast iron shots. The cast iron shots with a diameter of 1.2 mm and a hardness of HRC 50-55 are used as the projectiles, the projectile flow speed is controlled to be 55-65 m / s, the shot blasting time is 7 minutes, and the shot blasting time can be adjusted to 6-9 minutes according to the surface contamination degree.

[0072] During the shot blasting process, the rotating mechanism 4 and the supporting mechanism 5 move coordinately.

[0073] The rotating mechanism 4 includes a servo motor 44 with a model of MSMD082P1U and a rated power of 800 W, which drives the second gear 43 with a module of 2.5 and a number of teeth of 25, drives the first hollow gear 41 with a module of 2.5 and a number of teeth of 50 to rotate at a speed of 10 r / min, makes the sounding pipe move in a circular motion in the shot blasting pipe body 2, and has a motion radius of 180 mm.

[0074] The supporting mechanism 5 includes a reduction motor 55 with a model of CV-10R and a reduction ratio of 15:1, which drives the fourth gear 54 with a module of 2 and a number of teeth of 20, drives the third hollow gear 52 with a module of 2 and a number of teeth of 40 to rotate at a speed of 15 r / min, realizes self-rotation of the sounding pipe, and has a rotation direction perpendicular to the circular motion direction, cooperates with the vibration of the vibration rack 21, and ensures that the projectiles uniformly cover the surface of the sounding pipe.

[0075] The vibration rack 21 is composed of a rack, a spring with a stiffness coefficient of 800 N / mm, a bearing plate connected through an arm and the arm. The bearing plate is connected with the bottom of the shot blasting pipe body 2 through the arm, a vibration motor 22 with a model of YZS-15-2 and a power of 1.5 kW drives the vibration rack 21 to vibrate at a frequency of 50 Hz and an amplitude of 3 mm, makes the projectiles more uniformly distributed in the shot blasting pipe body 2, reduces the accumulation phenomenon, and enhances the impact force of the projectiles on the surface of the sounding pipe and the impact energy.

[0076] S4, cleaning and drying treatment:

[0077] The shot blasting sound tube is sent into an ultrasonic cleaning tank with a size of 2500x1200x1000mm, a frequency of 35kHz, a power density of 1.0W / cm2, deionized water as cleaning liquid with a resistivity of ≥1MΩ·cm, a flow rate of 25m3 / h, a lift of 20m, a circulating filtration with a filtration accuracy of 1μm and a filtration material of PP cotton+activated carbon, to ensure that the surface is free of shot residues and impurities.

[0078] After cleaning, high-speed air knives are used for drying, so that the sound tube can be completely dried, avoiding secondary corrosion caused by water residue.

[0079] Example 3

[0080] Device embodiment

[0081] Please refer to Figures 1-6 The embodiment provides a surface coating treatment device for a double-alloy sound tube, which has the following structure:

[0082] Overall structure:

[0083] The device comprises a shot blasting machine body 1, a shot blasting tube body 2 and a shot recycling system 3. The shot blasting tube body 2 is connected to both sides of the shot blasting machine body 1, and a sandblasting cavity (with a circular cross section, a diameter of 800mm and a height of 1500mm) is arranged in the inner cavity of the shot blasting tube body 2, which provides a closed and concentrated space for shot blasting treatment of the tube surface 61 of the sound tube product 6, avoids energy loss caused by shot splashing and improves shot blasting efficiency. The shot recycling system 3 is arranged on the back of the shot blasting machine body 1 and comprises a bucket elevator 31, a shot and sand separator 32, a shot storage cabin 33 and a recycling and dust removal system 34.

[0084] Shot recycling system 3:

[0085] The bucket elevator 31 has a lifting height of 3m, a lifting speed of 0.4m / s and a hopper capacity of 8L, and is used for lifting the shot after shot blasting from the bottom of the shot blasting tube body 2 to the shot storage cabin 33.

[0086] The shot and sand separator 32 is connected to the top of the shot blasting tube body 2 and adopts a magnetic separation structure (with a magnetic field strength of 8000Gs), which separates the shot from the ferrous impurities through a strong magnetic field, so that qualified shot with an impurity content of ≤0.5% can re-enter the recycling system, reducing shot waste.

[0087] The projectile storage cabin 33 is arranged at the top of the projectile circulating system 3, has a volume of 5 m3, and is provided with a warehouse door (800*600 mm in size) at the top through a hinge. A buckle (stainless steel) is arranged between the warehouse door and the projectile storage cabin 33, so as to facilitate the addition of projectiles into the storage cabin and ensure the sealing performance (sealing level IP65) of the warehouse door after being closed, thereby preventing dust and moisture from the outside from entering the storage cabin and polluting the projectiles.

[0088] The recycling and dust removal system 34 is arranged at the back of the shot blasting machine body 1 and comprises a recycling pipeline (300 mm in diameter and made of stainless steel) and a dust collector (20 m2 in filtration area and 5 μm in filtration precision). On one hand, the recycling pipeline is used to recycle the scattered projectiles and supplement the circulating system. On the other hand, the dust collector is used to adsorb and treat the dust generated in the process, so as to improve the working environment and reduce air pollution.

[0089] The rotating mechanism 4 comprises a first hollow gear 41, a second gear 43 and a servo motor 44.

[0090] The first hollow gear 41 is connected with the inner cavity of the shot blasting pipe body 2 through a first bearing 42 (6208 in model, 40 mm in inner diameter and 80 mm in outer diameter). The second gear 43 (modulus 3 and 20 in number of teeth) is engaged with the outside of the first hollow gear 41. The servo motor 44 (MSMD102P1U in model and 1.0 kW in rated power) is fixed to the outside of the shot blasting pipe body 2 through a motor frame (made of aluminum alloy) and drives the second gear 43 to rotate the first hollow gear 41, so as to realize the circumferential movement (200 mm in movement radius) of the acoustic probe pipe product 6 in the shot blasting pipe body 2. The outside of the servo motor 44 is connected with the motor frame through a rubber pad (made of rubber and 5 mm in thickness), which can effectively absorb the vibration and noise generated when the servo motor 44 operates. The motor frame is connected with the outside of the shot blasting pipe body 2 through bolts (M8*30 in specification and made of stainless steel), so as to ensure the stable installation of the motor and avoid the influence of the motor shaking on the gear engagement precision.

[0091] The supporting mechanism 5 comprises a first supporting plate 51, a second supporting plate 53 and a supporting motor 54.

[0092] A set in the first hollow gear 41 inner cavity, including fixed disc 51, the third hollow gear 52, the clamping plate 53, the fourth gear 54 and the reduction motor 55. Fixed disc 51 (material Q235, diameter 500mm) and chuck 45 (material 45# steel, diameter 400mm) are connected by bolts (specification M10x40, material stainless steel), the third hollow gear 52 (modulus 2.5, tooth number 30) is evenly arranged in the inner cavity of the fixed disc 51 (setting number 4, evenly distributed) through the bearing (model 6305, inner diameter 25mm, outer diameter 62mm), the clamping plate 53 (material Q345, arc structure, arc 120°, width 50mm) is arranged in the inner cavity of the third hollow gear 52 through the air cylinder (model SC63x150, stroke 150mm), which is used for clamping the acoustic pipe product 6 (clamping range outer diameter 50-150mm). The fourth gear 54 (modulus 2.5, tooth number 25) is engaged with the outside of the third hollow gear 52, and the reduction motor 55 (model CV-15R, reduction ratio 20:1, rated torque 50N·m) is arranged outside the fixed disc 51 through the star frame 56 (material Q235, thickness 8mm). The star frame 56 can evenly disperse the weight of the reduction motor 55 to the fixed disc 51, enhance the stability of the motor installation, reduce the vibration during operation, and ensure the precise engagement of the fourth gear 54 and the third hollow gear 52.

[0093] Vibration frame 21:

[0094] Both sides of the shot blasting machine body 1 are connected with the vibration frame 21, and the vibration frame 21 includes a frame (material channel steel, specification 10#), a bearing plate (material Q235, size 1000x800mm) connected with springs (material 60Si2Mn, stiffness coefficient 1000N / mm) and a connecting arm (material angle steel, specification 50x50x5mm). The bearing plate is welded with the bottom of the shot blasting pipe body 2 through the connecting arm, the vibration motor 22 (model YZS-20-2, power 2.0kW) is fixed on the top of the bearing plate through bolts (specification M12x50, material stainless steel), and drives the vibration of the vibration frame 21 (vibration frequency 60Hz, amplitude 4mm). The vibration is transmitted to the shot blasting pipe body 2 through the bearing plate and the connecting arm, so that the distribution of the pellets in the pipe body is more uniform, the accumulation of the pellets is reduced, and the impact force of the pellets on the pipe body surface 61 of the acoustic pipe product 6 is enhanced.

[0095] Air source treatment triple combination 11:

[0096] The bottom of the shot blasting machine body 1 is connected with the air source treatment triple combination 11 (filtering precision 1 μm, pressure regulating range 0-1.2 MPa, lubrication mode oil mist lubrication) through a short pipe (diameter 50 mm, stainless steel), the bottom of the air source treatment triple combination 11 is provided with a supporting base (material Q235, height 300 mm), which can filter, regulate pressure and lubricate the input compressed air, so as to ensure the stability of the air pressure during shot blasting (air pressure precision ±0.01 MPa), reduce the problem of uneven shot blasting force caused by air pressure fluctuation, and prolong the service life of pneumatic components (such as air cylinder and air source treatment triple combination 11).

[0097] The bucket elevator 31 of the projectile circulation system 3 in the device can be replaced by a screw conveyor, the screw diameter is 250 mm, the pitch is 200 mm, the conveying efficiency is 0.7 m / s, and it is suitable for large-flow projectile conveying.

[0098] The shot and sand separator 32 adopts a magnetic separation structure, and the separation efficiency is improved compared with the traditional air separation separator.

[0099] The shock-absorbing rubber pad is additionally arranged at the connection between the bearing plate of the vibrating frame 21 and the shot blasting pipe body 2, which is made of natural rubber, and can reduce the noise caused by vibration transmission.

[0100] The filter assembly of the air source treatment triple combination 11 adopts a replaceable polyester fiber filter element, which can adjust the filtering precision by replacing filter elements with different precision, and adapt to shot blasting operations with different cleanliness requirements.

[0101] It should be noted that, in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0102] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A surface coating treatment process for a dual-alloy acoustic logging tube, characterized in that, include: S1. Preprocessing: Compressed air and a soft brush are used to clean the surface of the CPVC-ASA alloy acoustic logging pipe to remove surface dust and particulate impurities; S2. Clamping and positioning: Clamp and fix the acoustic tube; S3. Shot blasting treatment: High-speed projectiles are used to impact the surface of the acoustic logging tube, ensuring that a plastic cyclic strain layer is generated on the surface of the tube due to the kinetic energy transfer of the projectiles. This is used to achieve grain refinement, increased dislocation density and substructure strengthening. At the same time, a residual compressive stress field is formed on the surface, which is a dual strengthening mechanism to improve the fatigue fracture resistance and hydrogen embrittlement stress corrosion fracture resistance of the acoustic logging tube. S4. Cleaning and drying process: The shot-blasted sonic logging pipe is sent into a cleaning tank, which is equipped with primary filter cotton, medium-efficiency filter cotton and high-efficiency filter cotton arranged in sequence. Water filtered by multiple layers of filter cotton is delivered to the nozzle by a water pump to clean the surface of the sonic logging pipe. The cleaned water is returned to the cleaning tank for recycling. The cleaned sonic logging pipe is dried by blowing it with a high-speed air knife.

2. The surface coating treatment process for a dual-alloy acoustic logging tube according to claim 1, characterized in that: The specific process in S1, the pretreatment, is as follows: first, dust is removed by blowing with compressed air and cleaning with a soft brush; then, oil and grease are removed by isopropanol as a mild solvent or low-concentration alkaline solution, supplemented by ultrasonic cleaning; subsequently, the surface is roughened by polishing with 400-600 grit sandpaper or sandblasting with glass microspheres, and then activated by plasma treatment.

3. The surface coating treatment process for a dual-alloy acoustic logging tube according to claim 1, characterized in that: In the S3 shot blasting process, the shot in the shot stream is steel shot, the shot stream velocity is 50-80 m / s, and the shot blasting time is 3-8 minutes.

4. The surface coating treatment process for a dual-alloy acoustic logging tube according to claim 1, characterized in that: In step S4, the cleaning and drying process, the drying process uses a high-speed air knife to dry the food for 2-5 minutes.

5. A surface coating treatment apparatus for a bi-alloy acoustic logging tube used to implement the surface coating treatment process of the bi-alloy acoustic logging tube according to claim 1, comprising a shot blasting machine body (1), a shot blasting tube body (2), and a shot circulation system (3), wherein the shot blasting tube body (2) is connected to both sides of the shot blasting machine body (1), and the shot circulation system (3) is disposed on the back side of the shot blasting machine body (1), characterized in that: The inner cavity of the shot blasting tube (2) is provided with a sandblasting chamber. The exhaust end of the shot blasting machine body (1) is connected to a shot separator (32). The shot separator (32) is connected to the top of the shot blasting tube (2). The top of the shot circulation system (3) is connected to a shot storage chamber (33). The back of the shot blasting machine body (1) is provided with a recycling and dust removal system (34). The inner cavity of the shot blasting tube (2) is provided with a rotating mechanism (4). The rotating mechanism (4) includes a first hollow gear (41), which is connected to the inner cavity of the shot blasting tube (2) via a first bearing (42). A second gear (43) is meshed with the outside of the first hollow gear (41). A servo motor (44) is provided on the back of the second gear (43). A chuck (45) is connected to the inner cavity of the first hollow gear (41). A support mechanism (5) is provided in the inner cavity of the chuck (45). The support mechanism (5) includes a fixed plate (51), which is connected to the chuck (45). A third hollow gear (52) is evenly arranged in the inner cavity of the fixed plate (51) via a bearing. A clamping plate (53) is provided in the inner cavity of the third hollow gear (52) via a cylinder. A fourth gear (54) is meshed with the outside of the third hollow gear (52). A reduction motor (55) is provided on the front of the fourth gear (54).

6. The surface coating treatment device for a dual-alloy acoustic logging tube according to claim 5, characterized in that: Both sides of the shot blasting machine body (1) are connected to a vibrating frame (21). A vibrating motor (22) is provided on the top of the vibrating frame (21). The vibrating frame (21) includes a frame. A load-bearing plate is connected to the top of the frame by a spring. The load-bearing plate is connected to the vibrating frame (21). The top of the load-bearing plate is connected to the bottom of the shot blasting tube body (2) by a connecting arm.

7. The surface coating treatment device for a dual-alloy acoustic logging tube according to claim 5, characterized in that: The bottom of the shot blasting machine body (1) is connected to an air source processing triple unit (11) via a short pipe, and a support base is provided at the bottom of the air source processing triple unit (11).

8. The surface coating treatment device for a dual-alloy acoustic logging tube according to claim 5, characterized in that: The top of the bullet storage compartment (33) is provided with a door via a hinge, and a latch is provided between the door and the bullet storage compartment (33).

9. The surface coating treatment device for a dual-alloy acoustic logging tube according to claim 5, characterized in that: The servo motor (44) is connected to a motor frame via a rubber pad, and the motor frame is connected to the outside of the shot blasting tube (2) via bolts.

10. The surface coating treatment device for a dual-alloy acoustic logging tube according to claim 5, characterized in that: The geared motor (55) is provided with a star-shaped frame (56) on its exterior, and the star-shaped frame (56) is bolted to the exterior of the fixed plate (51).

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