Oil well pipe laser cladding layer quality detection device

Abstract

The utility model belongs to the technical field of laser cladding coating detection, concretely relates to an oil well pipe laser cladding layer quality detection device, including the workstation, the workstation front side is equipped with the work groove, the workstation bottom is equipped with the support subassembly, the work groove left side inner wall rotatory assembly has the pivot, first motor fixed mounting is in the workstation right side, and the output shaft of first motor is connected with the transmission of assembly disc, the lifting type roughness detection mechanism, the lifting type roughness detection mechanism sliding assembly is in the inside of sliding slot, drive mechanism, drive mechanism installation is in the inside of sliding slot, is used for driving the reciprocating displacement of lifting type roughness detection mechanism, the utility model simple structure reasonable in design, through the cooperation of first air cylinder and first clamping piece, the oil well pipe of different length is adapted, and first motor drives the rotation of oil well pipe and can cover all detection area of circumferential surface, has no detection blind area, at the same time, does not need staff to hold and detect, improves the detection efficiency and the accuracy of detection result.

Description

Technical Field

[0001] This utility model belongs to the field of laser cladding coating detection technology, specifically relating to a laser cladding coating quality detection device for oil well pipes. Background Technology

[0002] Currently, laser cladding is often applied to the outer surface of oil well pipes to achieve wear resistance and corrosion protection. The surface roughness of the cladding is crucial to its service performance: excessive roughness can cause sand-laden fluids in the well to form eddies and accumulate impurities, accelerating local corrosion and easily causing cracking of the cladding layer; while excessive roughness will reduce the adhesion to the subsequent protective coating, leading to coating peeling. Therefore, surface roughness testing is required when inspecting the quality of laser cladding on oil well pipes.

[0003] In existing technologies, most roughness tests are conducted manually using handheld contact roughness testers. However, oil well pipes are quite long, requiring manual movement of the pipe or instrument multiple times, resulting in low testing efficiency. Furthermore, oil well pipes are tubular structures lacking positioning mechanisms, making them prone to rolling during testing. This makes it impossible to ensure that the test points are evenly distributed along the axial or circumference, leading to insufficient data representativeness. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this invention is to provide a laser cladding layer quality inspection device for oil well pipes. By using a first cylinder and a first clamping component to match oil well pipes of different lengths, and a first motor to drive the oil well pipe to rotate, the device can cover all inspection areas on the circumference, eliminating blind spots. At the same time, it eliminates the need for personnel to hold the device for inspection, thereby improving inspection efficiency and the accuracy of inspection results.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A device for inspecting the quality of laser cladding coating on oil well pipes, comprising:

[0007] The workbench has a work groove on the front side and a support component at the bottom. A rotating shaft is rotatably mounted on the left inner wall of the work groove, and a first clamping component is fixedly installed on the right end of the rotating shaft. An installation groove is provided on the right inner wall of the work groove, and a sliding groove connected to the work groove is provided on the top of the workbench.

[0008] The first cylinder is rotatably mounted on the inner wall of the right side of the mounting slot via the assembly plate, and the telescopic end of the first cylinder is fixedly mounted with a second clamping component.

[0009] The first motor is fixedly installed on the right side of the workbench, and the output shaft of the first motor is connected to the assembly plate via a transmission.

[0010] The lifting roughness testing mechanism is slidably assembled inside the slide groove.

[0011] The drive mechanism is installed inside the slide groove and is used to drive the lifting roughness detection mechanism to move back to the reset position.

[0012] The controller is installed on the front side of the workbench. The first cylinder, the first motor lifting roughness detection mechanism, and the drive mechanism are all electrically connected to the controller.

[0013] As a preferred technical solution, limit grooves are provided on the inner walls of both the front and rear sides of the slide. The lifting roughness detection mechanism includes a slider, which is slidably assembled inside the slide. Stabilizing blocks that are slidably connected to the limit grooves are fixedly installed on both the front and rear sides of the slider. A second cylinder is fixedly installed on the top of the slider. The telescopic end of the second cylinder passes through the slider and is fixedly installed with an assembly box. A pressure sensor is fixedly installed on the upper inner wall of the assembly box. An assembly plate is fixedly installed at the bottom of the pressure sensor. A contact surface roughness detection probe is fixedly installed at the bottom of the assembly plate. The second cylinder, the pressure sensor, and the contact surface roughness detection probe are all electrically connected to the controller.

[0014] As a preferred technical solution, the drive mechanism includes a lead screw, the left and right ends of which are rotatably connected to the inner walls of the left and right sides of the front limiting groove, the front stabilizing block is threadedly connected to the lead screw, and a second motor is fixedly installed on the upper right side of the worktable, the output shaft of the second motor is connected to the lead screw drive.

[0015] As a preferred technical solution, an extension block is fixedly installed at the bottom of the rear stabilizing block, a displacement groove matching the position of the extension block is opened on the upper inner wall of the working groove, a frame is fixedly installed at the bottom of the extension block, and a drive block is slidably assembled inside the frame.

[0016] A third cylinder is fixedly installed on the rear side of the workbench. The telescopic end of the third cylinder extends into the working groove and is fixedly installed with a horizontal assembly block. A moving groove is opened on the front side of the horizontal assembly block, and the rear side of the drive block extends into the moving groove and is slidably connected to the moving groove.

[0017] A cleaning mechanism is provided on the front side of the drive block.

[0018] As a preferred technical solution, the cleaning mechanism includes a cleaning cotton, which is fixedly installed on the upper front side of the drive block;

[0019] A groove is provided on the lower front side of the drive block. An air pipe is fixedly installed on the upper side inside the groove. Several jet nozzles are obliquely mounted on the front side of the air pipe. A hose is fixedly connected to the air pipe. An air pump is fixedly installed on the rear side of the worktable. One end of the hose is fixedly connected to the air outlet of the air pump. The air pump is electrically connected to the controller.

[0020] The beneficial effects of this utility model are:

[0021] 1. The clamping and angle adjustment are flexible. The first cylinder and the first clamping part are matched with oil well pipes of different lengths. The first motor drives the oil well pipe to rotate, which can cover all detection areas on the circumference, with no blind spots. At the same time, there is no need for the staff to hold the pipe for detection, which improves the detection efficiency and the accuracy of the detection results.

[0022] 2. Excellent cleaning effect, adopting a dual cleaning mode of air jetting and wiping, and the cleaning mechanism moves synchronously with the detection mechanism, combined with the rotation of the oil well pipe to achieve axial comprehensive cleaning, avoiding impurities from interfering with the detection accuracy;

[0023] 3. High detection accuracy and safety: The stabilizing block and the limiting groove work together to ensure smooth displacement of the detection mechanism; the pressure sensor adjusts the probe contact pressure in real time to prevent damage to the cladding layer or data deviation.

[0024] 4. The structure is highly interconnected. The drive mechanism moves both the detection mechanism and the cleaning mechanism simultaneously. The third cylinder precisely adjusts the cleaning distance. The coordinated operation of each component reduces the number of operation steps and improves the overall continuity of the detection process. Attached Figure Description

[0025] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a side view of the structure of this utility model;

[0028] Figure 3 This is a schematic diagram showing the rear view of the present invention;

[0029] Figure 4 This is a schematic diagram of the assembly box and pressure sensor of this utility model.

[0030] Figure 5 This is a schematic diagram of the assembly of the first cylinder and the second clamping component of this utility model.

[0031] Figure 6 This is a schematic diagram of a first partial structure of the present invention;

[0032] Figure 7 This is a schematic diagram of a second partial structure of the present invention.

[0033] Reference numerals: worktable 1, work slot 11, support assembly 12, rotating shaft 13, first clamping member 14, mounting slot 15, slide groove 16, limiting slot 161;

[0034] First cylinder 2, assembly plate 21, second clamping component 22;

[0035] First motor 3;

[0036] 4. Lifting roughness detection mechanism, 41. Slider, 42. Stabilizing block, 43. Second cylinder, 44. Assembly box, 45. Pressure sensor, 46. Assembly plate, 47. Contact surface roughness detection probe.

[0037] Drive mechanism 5, lead screw 51, second motor 52;

[0038] Controller 6;

[0039] Extension block 7, displacement groove 71, frame 721, drive block 72, third cylinder 73, transverse assembly block 74, moving groove 75

[0040] 8. Cleaning cotton, 81. Air tube, 82. Air nozzle, 83. Hose, 84. Air pump. Detailed Implementation

[0041] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0042] Example 1:

[0043] like Figure 1-5 As shown, this utility model discloses a laser cladding layer quality inspection device for oil well pipes, comprising:

[0044] Workbench 1, with a work groove 11 on the front side of the workbench 1, a support component 12 at the bottom of the workbench 1, a rotating shaft 13 rotatably mounted on the left inner wall of the work groove 11, a first clamping component 14 fixedly installed on the right end of the rotating shaft 13, an installation groove 15 on the right inner wall of the work groove 11, and a sliding groove 16 connected to the work groove 11 on the top of the workbench 1.

[0045] The first cylinder 2 is rotatably mounted on the inner wall of the right side of the mounting groove 15 via the assembly plate 21, and the telescopic end of the first cylinder 2 is fixedly mounted with the second clamping member 22.

[0046] The first motor 3 is fixedly installed on the right side of the workbench 1, and the output shaft of the first motor 3 is connected to the assembly plate 21 for transmission.

[0047] The lifting roughness detection mechanism 4 is slidably assembled inside the slide groove 16. Specifically, the inner walls of the front and rear sides of the slide groove 16 are provided with limit grooves 161. The lifting roughness detection mechanism 4 includes a slider 41, which is slidably assembled inside the slide groove 16. Stabilizing blocks 42 that are slidably connected to the limit grooves 161 are fixedly installed on the front and rear sides of the slider 41. A second cylinder 43 is fixedly installed on the top of the slider 41. The telescopic end of the second cylinder 43 passes through the slider 41 and is fixedly installed with an assembly box 44. A pressure sensor 45 is fixedly installed on the upper inner wall of the assembly box 44. An assembly plate 46 is fixedly installed on the bottom of the pressure sensor 45. A contact surface roughness detection probe 47 is fixedly installed on the bottom of the assembly plate 46. The second cylinder 43, the pressure sensor 45, and the contact surface roughness detection probe 47 are all electrically connected to the controller 6.

[0048] The oil well pipe to be tested is placed in the working slot 11 of the workbench 1. The first cylinder 2 is started by the controller 6, which pushes the second clamping member 22 to the left. It works in conjunction with the first clamping member 14 connected by the rotating shaft 13 on the left side of the working slot 11 to achieve stable clamping from both ends of the oil well pipe. If it is necessary to test the quality of the cladding layer on different circumferential surfaces of the oil well pipe, the first motor 3 can be started by the controller 6. Its output shaft drives the assembly plate 21, the first cylinder 2, and the second clamping member 22 to rotate, thereby driving the oil well pipe to rotate synchronously with the first clamping member 14 and the rotating shaft 13 to adjust the testing position.

[0049] Before testing, the controller 6 starts the drive mechanism 5, which drives the slider 41 of the lifting roughness testing mechanism 4 to slide in the slide groove 16. At the same time, the stabilizing blocks 42 on the front and rear sides of the slider 41 move synchronously along the limiting groove 161 to ensure that the testing mechanism is smoothly moved above the area to be tested on the oil well pipe. Then, the second cylinder 43 is started, and its telescopic end pushes the assembly box 44 down, so that the contact surface roughness testing probe 47 at the bottom of the assembly plate 46 is in contact with the surface of the cladding layer of the oil well pipe. The pressure sensor 45 in the assembly box 44 monitors the contact pressure between the probe and the cladding layer in real time and feeds the data back to the controller 6 to avoid excessive pressure damaging the cladding layer or insufficient pressure affecting the testing accuracy. Finally, the drive mechanism 5 drives the testing mechanism to move along the axial direction of the oil well pipe, and the contact surface roughness testing probe 47 completes the full-process testing of the roughness of the cladding layer. The data is recorded and analyzed by the controller 6.

[0050] The drive mechanism 5 is installed inside the slide groove 16 and is used to drive the lifting roughness detection mechanism 4 to move back and forth. Specifically, the drive mechanism 5 includes a lead screw 51, the left and right ends of which are rotatably connected to the inner walls of the left and right sides of the front limiting groove 161, the front side stabilizing block 42 is threadedly connected to the lead screw 51, and a second motor 52 is fixedly installed on the upper right side of the worktable 1. The output shaft of the second motor 52 is connected to the lead screw 51 for transmission.

[0051] In operation, the second motor 52 is started via the controller 6, and its output shaft drives the lead screw 51 to rotate within the limiting groove 161 on the front side of the slide 16. Since the front stabilizing block 42 is threadedly connected to the lead screw 51, and the stabilizing block 42 is restricted from circumferential rotation by the limiting groove 161 along with the slider 41, the rotational motion of the lead screw 51 is converted into the linear motion of the stabilizing block 42. This, in turn, drives the entire lifting roughness detection mechanism 4 to reciprocate left and right along the slide 16, achieving axial adjustment of the detection position. By controlling the forward and reverse rotation of the second motor 52, the direction of movement of the detection mechanism can be flexibly adjusted to meet the detection requirements for the entire length of the oil well pipe cladding layer.

[0052] The controller 6 is installed on the front side of the workbench 1. The first cylinder 2, the first motor 3, the lifting roughness detection mechanism 4, and the drive mechanism 5 are all electrically connected to the controller 6.

[0053] Example 2:

[0054] Further improvements were made based on Example 1, such as... Figure 6-7 The rear stabilizing block 42 has an extension block 7 fixedly installed at its bottom. The upper inner wall of the working groove 11 has a displacement groove 71 that matches the position of the extension block 7. The extension block 7 has a frame 721 fixedly installed at its bottom. The frame 721 has a drive block 72 slidably assembled inside it.

[0055] A third cylinder 73 is fixedly installed on the rear side of the workbench 1. The telescopic end of the third cylinder 73 extends into the work slot 11 and is fixedly installed with a transverse assembly block 74. A moving slot 75 is opened on the front side of the transverse assembly block 74. The rear side of the drive block 72 extends into the moving slot 75 and is slidably connected to the moving slot 75.

[0056] A cleaning mechanism is provided on the front side of the drive block 72.

[0057] When the drive mechanism 5 moves the rear stabilizing block 42 of the lifting roughness detection mechanism 4 along the limiting groove 161, the extension block 7 at the bottom of the stabilizing block 42 will slide synchronously along the displacement groove 71, thereby driving the frame 721 at the bottom of the extension block 7 and the internally sliding drive block 72 to move along the axial direction of the oil well pipe together with the detection mechanism, ensuring that the cleaning mechanism in front of the drive block 72 corresponds to the position of the detection mechanism. If it is necessary to adjust the distance between the cleaning mechanism and the surface of the cladding layer of the oil well pipe, the controller 6 can start the third cylinder 73 on the rear side of the workbench 1, and its telescopic end pushes the transverse assembly block 74 to move back and forth. At this time, the rear side of the drive block 72 will slide along the moving groove 75 of the transverse assembly block 74, and the drive block 72 will slide synchronously back and forth in the frame 721, so that the cleaning mechanism fits the area to be cleaned. Before the detection mechanism moves to detect, the cleaning mechanism will pre-clean the surface of the cladding layer of the oil well pipe along the axial movement of the extension block 7 to avoid impurities interfering with subsequent detection.

[0058] The cleaning mechanism includes a cleaning cotton 8, which is fixedly installed on the upper front side of the drive block 72;

[0059] A groove is provided on the lower front side of the drive block 72. An air pipe 81 is fixedly installed on the upper side inside the groove. Several jet nozzles 82 are obliquely mounted on the front side of the air pipe 81. A hose 83 is fixedly connected to the air pipe 81. An air pump 84 is fixedly installed on the rear side of the workbench 1. One end of the hose 83 is fixedly connected to the air outlet of the air pump 84. The air pump 84 is electrically connected to the controller 6.

[0060] When the drive block 72 moves along the oil well pipe axis with the extension block 7 and is adjusted by the third cylinder 73 to fit the area to be cleaned, the controller 6 can start the air pump 84 on the back of the workbench 1. The gas generated by the air pump 84 is delivered to the air pipe 81 in the lower groove on the front side of the drive block 72 through the hose 83, and then sprayed onto the surface of the cladding layer of the oil well pipe through several jet nozzles 82 that are inclined on the front side of the circumference of the air pipe 81, to initially blow away the dust, debris and other impurities on the surface. At the same time, the cleaning cotton 8 fixedly installed on the upper front side of the drive block 72 moves with the drive block 72 and further wipes the surface of the cladding layer after the jet cleaning to ensure that the inspection area is clean and free of impurities, providing a clean surface environment for subsequent inspection.

[0061] During use, it achieves dual cleaning by first blowing air and then sweeping, improving the accuracy of the test results. At the same time, the first motor 3 drives the assembly plate 21 to rotate, which can drive the clamped oil well pipe to rotate, achieving axial cleaning with good cleaning effect.

[0062] All electrical components mentioned in this solution are existing technologies, and their models are only one of them. Any electrical component that can achieve the purpose of this solution can be used.

[0063] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires, and should select appropriate controllers according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical connections between the various electrical components are completed in sequence. The detailed connection methods are well-known technologies in the field. The following mainly introduces the working principle and process, and will not describe the electrical control further.

[0064] The device is used as follows:

[0065] In use, the oil well pipe to be tested is first placed in the working slot 11 of the workbench 1. The first cylinder 2 is started by the controller 6 on the front side of the workbench 1, so that its telescopic end pushes the second clamping member 22 to the left. In conjunction with the first clamping member 14 connected by the rotating shaft 13 on the left side of the working slot 11, the oil well pipe is stably clamped from both ends. If it is necessary to test the quality of the cladding layer on different circumferential surfaces of the oil well pipe, the first motor 3 can be started by the controller 6. Its output shaft drives the assembly plate 21, the first cylinder 2, and the second clamping member 22 to rotate, thereby driving the oil well pipe to rotate synchronously with the first clamping member 14 and the rotating shaft 13, and adjusting it to the target detection circumferential surface.

[0066] Next, cleaning preparations are carried out before testing. The second motor 52 of the drive mechanism 5 is started by the controller 6. Its output shaft drives the lead screw 51 to rotate in the limiting groove 161 on the front side of the slide 16. Since the front stabilizing block 42 is threadedly connected to the lead screw 51 and its circumferential rotation is restricted by the limiting groove 161, the rotation of the lead screw 51 is converted into the linear motion of the stabilizing block 42, which drives the slider 41 of the lifting roughness detection mechanism 4 to slide along the slide 16. At the same time, the bottom extension block 7 of the slider 41 moves synchronously along the displacement groove 71, thereby driving the frame The body 721 and the drive block 72 move with the detection mechanism; at this time, the third cylinder 73 is activated, and its telescopic end pushes the transverse assembly block 74 to move back and forth. The rear side of the drive block 72 slides along the moving groove 75 and slides synchronously in the frame 721, so that the front cleaning mechanism of the drive block 72 fits against the surface of the oil well pipe cladding layer. Then the air pump 84 is activated, and the gas is sprayed out from the jet head 82 through the hose 83 and the air pipe 81 to initially blow away impurities. At the same time, the cleaning cotton 8 can clean the surface of the rotating oil well pipe, realizing the dual cleaning of blowing air first and then cleaning.

[0067] After cleaning, the inspection process begins. Controller 6 continues to control drive mechanism 5, moving lifting surface roughness inspection mechanism 4 above the area to be inspected. The second cylinder 43 is activated, its telescopic end pushing assembly box 44 downwards, causing the contact surface roughness inspection probe 47 at the bottom of assembly plate 46 to adhere to the cladding surface. Pressure sensor 45 inside assembly box 44 monitors the contact pressure in real time and feeds it back to controller 6 to prevent abnormal pressure from affecting the inspection. Finally, drive mechanism 5 drives the inspection mechanism to move along the oil well pipe axis, and contact surface roughness inspection probe 47 completes the entire inspection. Data is recorded and analyzed by controller 6. If the inspection direction needs to be adjusted, controlling the second motor 52 to rotate forward and reverse flexibly changes the movement path of the inspection mechanism.

[0068] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A device for detecting the quality of laser cladding layers in oil well tubing, characterized in that: include The workbench (1) has a work groove (11) on the front side and a support assembly (12) at the bottom. A rotating shaft (13) is rotatably mounted on the left inner wall of the work groove (11). A first clamping piece (14) is fixedly installed on the right end of the rotating shaft (13). An installation groove (15) is opened on the right inner wall of the work groove (11). A sliding groove (16) connected to the work groove (11) is opened on the top of the workbench (1). The first cylinder (2) is rotatably mounted on the inner wall of the right side of the mounting slot (15) via the assembly plate (21). The telescopic end of the first cylinder (2) is fixedly mounted with a second clamping member (22). The first motor (3) is fixedly installed on the right side of the workbench (1), and the output shaft of the first motor (3) is connected to the assembly plate (21) for transmission. The lifting roughness detection mechanism (4) is slidably assembled inside the slide groove (16); The drive mechanism (5) is installed inside the slide groove (16) and is used to drive the lifting roughness detection mechanism (4) to move back and forth. The controller (6) is installed on the front side of the workbench (1). The first cylinder (2), the first motor (3), the lifting roughness detection mechanism (4) and the drive mechanism (5) are all electrically connected to the controller (6).

2. The oil well pipe laser cladding layer quality inspection device according to claim 1, characterized in that: Limiting grooves (161) are provided on the inner walls of the front and rear sides of the slide (16). The lifting roughness detection mechanism (4) includes a slider (41). The slider (41) is slidably assembled inside the slide (16). Stabilizing blocks (42) that are slidably connected to the limiting grooves (161) are fixedly installed on the front and rear sides of the slider (41). A second cylinder (43) is fixedly installed on the top of the slider (41). The telescopic end of the second cylinder (43) passes through the slider (41) and is fixedly installed on the assembly box (44). A pressure sensor (45) is fixedly installed on the upper inner wall of the assembly box (44). An assembly plate (46) is fixedly installed on the bottom of the pressure sensor (45). A contact surface roughness detection probe (47) is fixedly installed on the bottom of the assembly plate (46). The second cylinder (43), the pressure sensor (45), and the contact surface roughness detection probe (47) are all electrically connected to the controller (6).

3. The oil well pipe laser cladding layer quality inspection device according to claim 2, characterized in that: The drive mechanism (5) includes a lead screw (51), the left and right ends of the lead screw (51) are rotatably connected to the inner walls of the left and right sides of the front limiting groove (161) respectively, the front stabilizing block (42) is threadedly connected to the lead screw (51), and a second motor (52) is fixedly installed on the upper right side of the worktable (1), and the output shaft of the second motor (52) is connected to the lead screw (51) for transmission.

4. The oil well pipe laser cladding layer quality inspection device according to claim 3, characterized in that: An extension block (7) is fixedly installed at the bottom of the rear stabilizing block (42). A displacement groove (71) matching the position of the extension block (7) is opened on the upper inner wall of the working groove (11). A frame (721) is fixedly installed at the bottom of the extension block (7). A drive block (72) is slidably assembled inside the frame (721). A third cylinder (73) is fixedly installed on the rear side of the workbench (1). The telescopic end of the third cylinder (73) extends into the work slot (11) and is fixedly installed with a transverse assembly block (74). A moving slot (75) is opened on the front side of the transverse assembly block (74). The rear side of the drive block (72) extends into the moving slot (75) and is slidably connected with the moving slot (75). A cleaning mechanism is provided on the front side of the drive block (72).

5. The oil well pipe laser cladding layer quality inspection device according to claim 4, characterized in that: The cleaning mechanism includes a cleaning cotton (8), which is fixedly installed on the upper front side of the drive block (72); The drive block (72) has a groove on the lower front side. An air pipe (81) is fixedly installed on the upper side inside the groove. Several jet nozzles (82) are obliquely mounted on the front side of the air pipe (81). A hose (83) is fixedly connected to the air pipe (81). An air pump (84) is fixedly installed on the rear side of the workbench (1). One end of the hose (83) is fixedly connected to the air outlet of the air pump (84). The air pump (84) is electrically connected to the controller (6).

Images