Full-automatic sand blasting and rust removing environment-friendly device for pipeline

Abstract

The utility model provides a full-automatic sand blasting and rust removing environment-friendly device for a pipeline. The device comprises a sand blasting system, a recycling environment-friendly system, an action system, a software system and a measuring system, wherein the sand blasting system is used for spraying abrasive materials at a high speed to realize rust removal; the recycling environment-friendly system is used for recycling the abrasive materials and treating dust; the action system is used for full-automatic operation of sand blasting operation; the abrasive input end of the action system is connected with the sand blasting system, the abrasive output end of the action system is connected with the recycling environment-friendly system, the measuring system is arranged on the action system and connected with the data input end of the software system, and the action system is connected with the data output end of the software system. And the action system, the sand blasting system and the recycling environment-friendly system are all skid-mounted on the base. According to the full-automatic sand blasting and rust removing environment-friendly device for the pipeline, automatic sand blasting, rust removing and detecting are carried out on the pipeline, meanwhile, grinding materials are recycled, and dust falling operation is completed.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline construction, specifically relating to a fully automatic sandblasting and rust removal environmental protection device for pipelines, which is particularly suitable for sandblasting and rust removal operations in field construction scenarios of long-distance pipelines. Background Technology

[0002] Long-distance pipelines, also known as long-distance oil or gas pipelines, primarily connect oil and gas fields with processing facilities or consumer markets, enabling the efficient and safe transportation of oil and gas resources. These pipelines typically span tens to hundreds, or even thousands of kilometers, covering diverse geographical and environmental conditions. Long-distance pipelines can be categorized by material into metallic and non-metallic pipelines. Metallic pipelines mainly include carbon steel pipes and alloy steel pipes. During operation, long-distance pipelines are prone to corrosion due to environmental factors and the influence of the media. If anti-corrosion and repair measures are not implemented promptly, corrosion can lead to thinning of the pipeline wall and even perforation, potentially causing oil and gas leaks. Effective anti-corrosion and repair measures can significantly reduce safety hazards caused by pipeline corrosion, ensure the safe and stable operation of the pipeline system, extend the service life of the pipeline system, improve energy transmission efficiency, and protect the environment.

[0003] The first step in corrosion protection and joint repair of long-distance pipelines is rust removal. Currently, most designs require sandblasting. Sandblasting uses compressed air to propel abrasive materials (such as garnet sand, copper ore sand, quartz sand, etc.) at high speed onto the workpiece surface to remove rust, scale, oil, and other residues. The rust removal quality reaches Sa2.0. Because the construction environment is a mobile field operation, it is not possible to use factory-scale equipment for enclosed operations in a plant. Currently, the most common sandblasting method is manual open-field sandblasting. This approach has the following problems:

[0004] Problem 1: Sandblasting produces a lot of dust, which is blown around by the wind and pollutes the air.

[0005] Problem 2: Quartz sand is splashed everywhere without any recycling measures, resulting in waste of raw materials;

[0006] Question 3: Manual labor results in low construction efficiency and a high degree of randomness in construction quality.

[0007] CN113927489A discloses an integrated continuous sandblasting and rust removal production line and its operating method for pipelines, mainly including: a drive motor, a sandblasting system cover, a gearbox, a transmission chain, and a sandblasting and blowing assembly. The production line also includes: a drive roller assembly, a first clamping mechanism, a second clamping mechanism, and a universal joint. The drive motor is connected to the universal joint via the gearbox. A gear is fixedly mounted on one end of the universal joint, and a double frustum roller is fixedly mounted on the other end. The universal joint and the double frustum roller are synchronously connected and rotate on the drive roller assembly. Multiple sets of parallel drive roller assemblies are connected via a transmission chain and gears. However, this production line needs improvement in reducing dust emission and ease of operation, and it does not involve automatic control. Utility Model Content

[0008] To address the problems existing in the prior art, the purpose of this utility model is to provide a fully automated sandblasting and rust removal environmentally friendly device for pipelines. This device automatically sandblasts and removes rust from pipelines, performs inspection, recovers abrasive materials, and reduces dust.

[0009] The technical solutions adopted in this utility model are as follows:

[0010] An automated pipeline sandblasting and rust removal environmental protection device includes a sandblasting system for high-speed abrasive spraying to remove rust, a recycling and environmental protection system for abrasive recovery and dust treatment, an action system for fully automated sandblasting operation, a software system for data processing and hardware drive, and a measurement system for quality inspection. The abrasive input end of the action system is connected to the sandblasting system, and the abrasive output end of the action system is connected to the recycling and environmental protection system. The measurement system is mounted on the action system and is connected to the data input end of the software system. The action system, sandblasting system, and recycling and environmental protection system are all skid-mounted on a base.

[0011] Furthermore, the sandblasting system includes an air compressor for pressurizing gas, a pressure stabilizing tank for stabilizing gas pressure, a sand storage tank for storing abrasive, a protective cover covering the pipeline, and a nozzle for blasting abrasive. The gas output pipeline of the air compressor is connected to the gas inlet of the pressure stabilizing tank, the gas outlet of the pressure stabilizing tank is connected to one end of the gas delivery pipe, the other end of the gas delivery pipe is connected to a first flexible pipeline, the discharge port of the first flexible pipeline is connected to the nozzle, the nozzle is mounted on the protective cover, the discharge pipe at the bottom of the sand storage tank merges with the gas delivery pipe, and a first control valve is provided on the discharge pipe of the sand storage tank. The gas output pipeline of the air compressor, the gas delivery pipe, and the discharge pipe of the sand storage tank are all rigid pipelines, preferably φ73*4 seamless steel pipes. The first flexible pipeline is preferably a steel wire braided pressure-resistant rubber hose. The software system interlocks and controls the opening and closing of the first control valve and the start and stop of the pressure stabilizing tank and the air compressor. The air compressor is preferably 1 m³ / min, and the exhaust pressure is, for example, 1 MPa.

[0012] Furthermore, the protective cover is arc-shaped and includes a frame and a cover plate. The frame consists of two parallel arc-shaped plates and two strip plates connecting the arc-shaped plates. The width of the strip plates is the same as the height of the arc-shaped plates, and the inner curvature of the arc-shaped plates matches that of the pipe. The cover plate is a curved plate, and it connects to the outer arc of the arc-shaped plates and the outer edge of the strip plates. The cover plate has a sandblasting nozzle and a sand suction nozzle. Preferably, the sand suction nozzle is located below the sandblasting nozzle. The sandblasting nozzle can be rectangular, for example, and the sand suction nozzle can be circular, for example. The sandblasting nozzle is connected to the nozzle. The outer surface of the cover plate is connected to the telescopic rod, for example, by welding. The telescopic rod includes, for example, a sleeve, a pre-compression spring disposed in the sleeve, and a free rod that slides along the inner wall of the sleeve and is connected to the free end of the spring. The end of the free rod located on the outer side of the sleeve is connected to the cover plate. The free rod makes limited displacement along the sleeve direction within the sleeve to prevent the free rod from coming out of the sleeve. The telescopic rod makes the inner arc edge of the arc plate and the inner edge of the strip plate fit tightly against the pipe surface to prevent dust leakage and pressure loss. The material of the arc plate can be, for example, a steel plate with a thickness of about 8mm. The height of the arc plate can be, for example, 15cm. The arc plate and the strip plate are seamlessly welded together, for example. The cover plate can be, for example, a steel plate with a thickness of 6mm. In practical applications, air is pressurized by an air compressor and enters a pressure stabilizing tank. After the high-pressure gas stabilizes its pressure in the pressure stabilizing tank, it enters the air delivery pipe. Abrasive materials, such as quartz, flow into the air delivery pipe through the discharge pipe at the bottom of the sand storage tank. Driven by the high-pressure and high-speed gas, they move rapidly towards the nozzle and are sprayed onto the pipeline through the sandblasting nozzle to perform rust removal.

[0013] Furthermore, the recycling and environmental protection system includes a recycling tank for recycling abrasives, a dust suppression tank for dust removal, a water tank for storing water, and a vacuum pump for providing negative pressure. The inlet and suction port of the recycling tank are connected via a second flexible pipe, which serves as the recycling pipe for recycling abrasives. The inlet of the recycling tank is preferably located at the bottom of the tank. The outlet pipe at the bottom of the recycling tank is connected to the sand storage tank. Preferably, the recycling tank is located above the sand storage tank. A second control valve is installed on the outlet pipe of the recycling tank. When the second control valve is opened, the abrasives in the recycling tank enter the sand storage tank under gravity. The dust output pipe at the top of the recycling tank is connected to the dust suppression tank. The dust suppression tank is equipped with spray heads, which are connected to the water tank via a water supply pipe. Slurry is stored at the bottom of the dust suppression tank. The discharge pipe is equipped with a fifth control valve, which is closed when the mud is discharged and opens when the mud is discharged. The water tank is located above the dust suppression tank, and the water supply pipe is equipped with a third control valve. The water flow into the spray head is adjusted by adjusting the opening of the third control valve, which in turn adjusts the spraying speed of the spray head in the dust suppression tank. The dust suppression tank is connected to the vacuum pump via a negative pressure pipe, which is equipped with a fourth control valve. The vacuum pump provides a negative pressure environment for the entire recycling and environmental protection system. The discharge pipe, water supply pipe, and negative pressure pipe of the recycling tank are all rigid pipes, preferably φ73*4 seamless steel pipes. The second flexible pipe is preferably a steel wire braided pressure-resistant rubber hose. The software system interlocks the opening and closing of the third and fourth control valves and the start and stop of the vacuum pump. In practical applications, the abrasive, propelled by high-speed gas, strikes the pipe surface, removing rust, dirt, and other contaminants. The ejected abrasive, under gravity, accumulates at the bottom of the protective cover. The pressure of the ejected abrasive is set to be much greater than the suction pressure under negative pressure to ensure the impact force. Since the suction port is located at the bottom of the protective cover, the abrasive is drawn into the second flexible pipe. Rust and dirt, after being struck, are drawn into the second flexible pipe as dust along with the abrasive, and then enter the recovery tank. Due to the small space and high pressure inside the second flexible pipe, the space inside the recovery tank suddenly expands, the pressure decreases, the abrasive slows down, the heavier abrasive falls, and the lighter dust is drawn into the dust settling tank. The spray nozzles above the dust settling tank spray water mist to condense the dust into mud, which is then discharged.

[0014] Furthermore, the motion system includes a track that surrounds and conforms to the pipe, a crawler that moves along the track, a first motor fixed to the crawler, a threaded rod connected to the output shaft of the first motor, a slider threadedly connected to the threaded rod, and a connecting rod fixedly connected to the crawler, extending out of the crawler and passing through the slider. Both the threaded rod and the connecting rod are parallel to the central axis of the pipe.

[0015] Furthermore, the track is a ring track formed by two semicircular tracks enclosing each other. The track is coaxial with the pipeline. The semicircular tracks are preferably made of bent I-beams, such as 16# I-beams formed by hot bending. The two semicircular tracks are hinged. One semicircular track is fixedly connected to the hinge seat, and the other semicircular track is connected to the hinge block. The hinge seat is provided with a hinge shaft, and the hinge block has a through hole through the hinge shaft. The hinge block and the hinge seat rotate relative to each other to realize the opening and closing action of the two semicircular tracks. Each semicircular track includes an arc-shaped inner flange plate and an outer flange plate, and a web plate set between the inner flange plate and the outer flange plate. The inner surface of the inner flange plate is provided with a flexible rubber plate. The flexible rubber plate is used to protect the anti-corrosion layer of the pipeline and increase the friction between the semicircular track and the pipeline to prevent the semicircular track from sliding. The inner surface of the outer flange plate on both sides of the web plate is provided with tracks laid along the outer flange plate.

[0016] Furthermore, each semicircular track has two fixed bearings, positioned on either side of the hinge point of the semicircular track. A rotating shaft is located between the two bearings, rotatably or fixedly connected to the bearings. A rotating rod is rotatably connected to the rotating shaft, with its free end connected to a hydraulic rod. The hydraulic rod slides along a cylinder, and the end of the cylinder away from the hydraulic rod is rotatably connected to a lifting device. The lifting device includes a hook, a lifting plate, and a lifting rod. The hook is fixed above the lifting plate, and the lifting rod is fixed below the lifting plate. The end of the hydraulic rod is rotatably connected to the lifting rod, and the hook is suspended from a cantilever extending from the base. In practical applications, the two semicircular tracks are hoisted above the pipe requiring sandblasting and rust removal. The hydraulic rod retracts, opening the two semicircular tracks. The tracks are then moved downwards to both sides of the pipe, surrounding it. The hydraulic rod extends, and the two semicircular tracks enclose the pipe, with the inner flanges tightly against the pipe surface, thus fixing the tracks to the pipe.

[0017] Furthermore, the crawler includes a body, two opposing wheels, and a frame connecting the wheels and the body. The lower surface of the body is arc-shaped and fits against the outer surface of the outer flange. A wheel is provided on each side of the web. The outer circumference of the wheel is provided with teeth that match the track. The wheel is connected to the axle, and the axle is connected to a second motor for driving the axle to rotate. The second motor is a bidirectional stepper motor and is connected to the software system. The frame is C-shaped and spans the outer flange. The frame includes two parallel support rods and an intermediate rod connecting the two support rods. The two support rods are respectively connected to the body and the second motor. The first motor and the connecting rod are fixed to the body. The first motor is connected to the software system. The first motor can be, for example, a bidirectional stepper motor.

[0018] Furthermore, the slider has a threaded hole that matches the threaded rod and a through hole for the connecting rod to pass through. The lower part of the slider is connected to the sleeve of the telescopic rod. In specific applications, on the one hand, the first motor rotates, driving the threaded rod to rotate. The threaded rod drives the slider to move along the connecting rod, and the slider drives the protective cover to move along the axial direction of the pipeline. On the other hand, the second motor rotates, driving the wheels to rotate, driving the vehicle body to move along the track. The vehicle body drives the slider to make a circular motion, and then carries the protective cover to make a circular motion. The first motor and the second motor jointly control the protective cover to be positioned at the location of the pipeline that needs sandblasting and rust removal.

[0019] Furthermore, the measurement system includes a bracket fixed to the slider, a third motor fixed to the bracket and connected to the software system, a cam connected to the power shaft of the third motor, a moving rod located below the cam and extending out of the slider, a remote-type anchor pattern gauge fixed to the end of the moving rod and connected to the information input terminal of the software system, a fulcrum located on the slider and used to support the moving rod, and a spring connecting the moving rod and the slider. The bracket is inverted L-shaped, the cam is equilateral triangular in shape, the cam is suspended and connected to the third motor, the cam abuts against one end of the moving rod, the fulcrum is a portal frame, and the moving rod rotates. The crossbeam is connected to the fulcrum, which is located between the spring and the cam. The moving rod is a zigzag shape. In practical application, under the elastic force of the spring, the moving rod is pulled downward to rotate, so that the remote anchor pattern instrument contacts the pipe and inspects the surface of the pipe after rust removal. The third motor drives the cam to rotate, pressing one end of the moving rod. The moving rod rotates around the fulcrum, causing the other end of the moving rod to lift up, thus moving the remote anchor pattern instrument away from the pipe and into a suspended state. Since the bracket, fulcrum, and spring are all set on the slider, the first motor and the second motor jointly control the detection position of the remote anchor pattern instrument.

[0020] Furthermore, the software system, for example, uses an industrial computer as a carrier. The software system includes a database, a computing module, and a driver program. The database stores the rotation angle and frequency data of the first motor, the second motor, and the third motor, the measurement point positioning data, the anchor pattern depth range data that meets the specifications, and the moving speed, stroke, angle, and reset start point data of the crawler. The computing module performs logical operations on the data and generates execution commands. The driver program drives the first motor, the second motor, the third motor, the remote anchor pattern meter, the sandblasting system, and the recycling and environmental protection system. The data measured by the remote anchor pattern meter is compared with the stored data to determine whether the pipe surface after sandblasting and rust removal meets the specifications. If it meets the specifications, the sandblasting and rust removal continues to the next location. If it does not meet the specifications, the second motor and the first motor are controlled to rotate in opposite directions to return to the unqualified detection point, and the sandblasting and rust removal operation is performed again.

[0021] Furthermore, the base can be, for example, a steel structure frame, which is installed on a vehicle such as a car or tractor. The air compressor, pressure stabilizing tank, sand storage tank, recovery tank, dust suppression tank, and vacuum pump are fixed on the frame. The frame is, for example, made of narrow-flange H-beams with specifications of HN200*100mm.

[0022] The working process of the fully automatic sandblasting and rust removal environmental protection device for pipelines according to this utility model includes:

[0023] (1) Hoist the two semi-circular tracks above the pipe that needs to be sandblasted and derusted. The hydraulic rod retracts and the two semi-circular tracks open. Move the two semi-circular tracks down to both sides of the pipe and surround the pipe. The hydraulic rod extends and the two semi-circular tracks enclose the pipe. The inner flange plate is close to the surface of the pipe and the tracks are fixed to the pipe.

[0024] (2) Start the first motor and the second motor, adjust the position of the slider so that the protective cover is facing the position that needs to be sandblasted and rusted, and then turn off the first motor and the second motor;

[0025] (3) Start the air compressor, pressure tank, open the first control valve, start the vacuum pump, open the third control valve and the fourth control valve, start sandblasting and rust removal on the pipeline, set the working time of the air compressor, pressure tank and vacuum pump, turn off the air compressor, pressure tank and vacuum pump at the set end time, close the first control valve, the third control valve and the fourth control valve, and end the sandblasting and rust removal.

[0026] (4) Restart the first and second motors to adjust the position of the slider so that the remote anchor pattern instrument is facing the position where sandblasting and rust removal has been completed. Turn off the first and second motors and start the third motor. The cam rotates to release the pressure on the moving rod. Under the action of the spring force, the moving rod is pulled down to rotate and contact the pipe. The surface of the pipe after rust removal is inspected. After the inspection is completed, the third motor is rotated in the opposite direction to press one end of the moving rod. The remote anchor pattern instrument moves away from the pipe. The remote anchor pattern instrument transmits the measured data to the software system and compares it with the stored data to determine whether the surface of the pipe after sandblasting and rust removal meets the specifications. If it meets the specifications, repeat steps (2) and (3).

[0027] (5) If it does not meet the specifications, turn on and adjust the first and second motors again so that the protective cover returns to the position where the test is not qualified. Turn off the first and second motors and repeat steps (3) and (4) until the measured data meets the specifications.

[0028] The beneficial effects of this utility model are:

[0029] This utility model provides a fully automatic sandblasting and rust removal environmental protection device for pipelines. The device uses a sandblasting system to remove rust from pipelines and a recycling system to recover the abrasive material and treat dust. A protective cover is installed to fit tightly against the pipeline surface, preventing dust leakage and pressure loss, and reducing dust dispersion. Two hinged semi-circular tracks allow for detachable connection between the tracks and the pipeline. These two semi-circular tracks form a circular track for the movement of a crawler. Driven by a second motor, the crawler moves a slider in a circular motion. A first motor and connecting rod fixed to the vehicle body, along with a threaded rod connected to the output shaft of the first motor, provide support and limit for the slider, enabling axial movement. Driven by the first and second motors, the slider is positioned, thereby positioning the protective cover and the remote-controlled anchor pattern meter. A software system enables automatic control of the sandblasting system, recycling system, motion system, and measurement system, improving the working environment for workers and saving manpower. This utility model discloses a fully automatic sandblasting and rust removal environmental protection device for pipelines. It performs sandblasting and rust removal and quartz sand recycling on pipelines that have been welded together in open-air environments, while also completing dust reduction operations. Under the premise of meeting quality standards and ensuring safety and environmental protection, it reduces costs and increases efficiency, thereby improving the profitability of construction projects. Attached Figure Description

[0030] Figure 1 This is an overall drawing of an automated sandblasting and rust removal environmental protection device for pipelines according to this utility model.

[0031] Figure 2 This is a first-person perspective diagram of the motion system and measurement system.

[0032] Figure 3 for Figure 2 A in the enlarged view.

[0033] Figure 4 This is a schematic diagram from a second-person perspective of the motion system and measurement system.

[0034] Figure 5 for Figure 4 Enlarged view of point B in the image.

[0035] Figure 6 This is a schematic diagram from a third-person perspective of the motion system and measurement system.

[0036] Figure 7 for Figure 6 Enlarged view of point C in the image.

[0037] Figure 8 This is a schematic diagram of the protective shield.

[0038] Figure 9 This is a schematic diagram of the lifting device.

[0039] Figure 10 This is a schematic diagram of the base.

[0040] Figure label:

[0041] 1-Sandblasting system; 101-Air compressor; 102-Pressure stabilizing tank; 103-Sand storage tank; 104-Protective cover; 1041-Arc-shaped plate; 1042-Strip plate; 1043-Cover plate; 1044-Sandblasting nozzle; 1045-Sand suction port; 106-Air supply pipe; 107-First flexible pipe; 108-First control valve; 109-Telescopic rod.

[0042] 2-Recycling and Environmental Protection System, 201-Recycling Tank, 202-Dust Suppression Tank, 203-Water Tank, 204-Vacuum Pump, 205-Second Flexible Pipeline, 206-Spray Head, 207-Sludge Discharge Pipeline, 208-Third Control Valve, 209-Fourth Control Valve

[0043] 3-Motion System, 301-Rail, 3011-Semi-circular Rail, 30111-Inner Flange Plate, 30112-Outer Flange Plate, 30113-Web Plate, 3012-Hinge Seat, 3013-Hinge Block, 3014-Hinge Shaft, 302-Crawler, 3021-Car Body, 3022-Wheel, 3023-Frame, 3024-Gear Tooth, 3025-Second Motor, 303-First Motor, 304-Threaded Rod, 305-Slider, 306-Connecting Rod, 307-Crawler, 308-Axle Seat, 309-Rotating Shaft, 3010-Rotating Rod, 3015-Hydraulic Rod, 3016-Cylinder, 3017-Lifting Device, 30171-Hook, 30172-Lifting Plate, 30173-Lifting Rod

[0044] 4-Measuring system, 401-Support, 402-Third motor, 403-Cam, 404-Moving rod, 405-Remote anchor pattern meter, 406-Fulcrum, 407-Spring,

[0045] 5-Base,

[0046] 6-Pipeline. Detailed Implementation

[0047] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] like Figure 1-10As shown, a fully automatic pipeline sandblasting and rust removal environmental protection device includes a sandblasting system 1 for high-speed abrasive spraying to remove rust, a recycling and environmental protection system 2 for abrasive recovery and dust treatment, an action system 3 for fully automatic operation of sandblasting, a software system (or control system) for data processing and driving hardware, and a measurement system 4 for quality inspection. The abrasive input end of the action system 3 is connected to the sandblasting system 1, and the abrasive output end of the action system 3 is connected to the recycling and environmental protection system 2. The measurement system 4 is installed on the action system 3 and is connected to the data input end of the software system. The action system 3 is connected to the data output end of the software system. The action system 3, the sandblasting system 1, and the recycling and environmental protection system 2 are all skid-mounted on the base 5.

[0049] like Figure 1 As shown, the sandblasting system 1 includes an air compressor 101 for pressurizing gas, a pressure stabilizing tank 102 for stabilizing gas pressure, a sand storage tank 103 for storing abrasive, a protective cover 104 covering the pipe 6, and a nozzle for ejecting abrasive. The gas output pipe of the air compressor 101 is connected to the gas inlet of the pressure stabilizing tank 102, the gas outlet of the pressure stabilizing tank 102 is connected to one end of the gas delivery pipe 106, the other end of the gas delivery pipe 106 is connected to a first flexible pipe 107, and the discharge port of the first flexible pipe 107 is connected to the nozzle. The nozzle is equipped with... Placed on the protective cover 104, the discharge pipe at the bottom of the sand storage tank 103 merges with the air supply pipe 106. The discharge pipe of the sand storage tank 103 is equipped with a first control valve 108. The gas output pipe of the air compressor 101, the air supply pipe 106 and the discharge pipe of the sand storage tank 103 are all rigid pipes, preferably φ73*4 seamless steel pipes. The first flexible pipe 107 is preferably a steel wire braided pressure-resistant rubber hose. The software system interlocks the opening and closing of the first control valve 108 and the start and stop of the pressure stabilizing tank 102 and the air compressor 101. The model of the air compressor 101 is preferably 1 m³ / min, and the exhaust pressure can be, for example, 1 MPa, but is not limited to this.

[0050] like Figure 8As shown, the protective cover 104 is an arc-shaped body, including a frame and a cover plate 1043. The frame consists of two parallel arc-shaped plates 1041 and two strip plates 1042 connected between the arc-shaped plates 1041. The width of the strip plates 1042 is the same as the height of the arc-shaped plates 1041, and the inner curvature of the arc-shaped plates 1041 is the same as that of the pipe 6. The cover plate 1043 is a curved plate, and the cover plate 1043 is connected to the outer arc of the arc-shaped plates 1041 and the outer edge of the strip plates 1042. The cover plate 1043 has a sandblasting nozzle 1044 and a sand suction nozzle 1045. Preferably, the sand suction nozzle 1045 is located below the sandblasting nozzle 1044. The sandblasting nozzle 1044 can be rectangular, for example, and the sand suction nozzle 1045 can be circular, for example. The sandblasting nozzle 1044 is connected to the nozzle. The cover plate 1043 is curved. The outer surface of 43 is connected to the telescopic rod 109, for example, by welding. The telescopic rod 109 includes, for example, a sleeve, a pre-compression spring disposed in the sleeve, and a free rod that slides along the inner wall of the sleeve and is connected to the free end of the spring. The end of the free rod located on the outside of the sleeve is connected to the cover plate. The free rod makes limited displacement in the sleeve direction within the sleeve to prevent the free rod from coming out of the sleeve. The telescopic rod 109 makes the inner arc edge of the arc plate 1041 and the inner edge of the strip plate 1042 fit tightly against the surface of the pipe 6 to prevent ash leakage and pressure relief. The material of the arc plate 1041 can be, for example, a steel plate with a thickness of about 8 mm. The height of the arc plate 1041 can be, for example, 15 cm. The arc plate 1041 and the strip plate 1042 are, for example, seamlessly welded together. The cover plate 1043 can be, for example, a steel plate with a thickness of 6 mm. In practical applications, air is pressurized by air compressor 101 and enters pressure stabilizing tank 102. After the pressure of the high-pressure gas is stabilized in pressure stabilizing tank 102, it enters air delivery pipe 106. Abrasive materials, such as quartz, are discharged into air delivery pipe 106 through the discharge pipe at the bottom of sand storage tank 103. Driven by high-pressure and high-speed gas, they move rapidly towards the nozzle and are sprayed onto pipe 6 through sandblasting nozzle 1044 for rust removal.

[0051] like Figure 1As shown, the recycling and environmental protection system 2 includes a recycling tank 201 for recycling abrasives, a dust collection tank 202 for dust removal, a water tank 203 for storing water, and a vacuum pump 204 for providing negative pressure. The inlet of the recycling tank 201 and the suction port 1045 are connected by a second flexible pipe 205, which serves as the recycling pipe for recycling abrasives. The inlet of the recycling tank 201 is preferably located at the bottom of the recycling tank 201, and the outlet at the bottom of the recycling tank 201 is... The pipe is connected to the sand storage tank 103. Preferably, the recovery tank 201 is located above the sand storage tank 103. A second control valve is provided on the discharge pipe of the recovery tank 201. When the second control valve is opened, the abrasive in the recovery tank 201 enters the sand storage tank 103 under the action of gravity. The dust output pipe at the top of the recovery tank 201 is connected to the dust settling tank 202. The dust settling tank 202 is equipped with a spray head 206. The spray head 206 is connected to the water tank 203 via a water supply pipe. The bottom of the recycling tank 201 is equipped with a mud discharge pipe 207. The mud discharge pipe 207 is equipped with a fifth control valve. The fifth control valve is closed when the mud is discharged. The fifth control valve is opened when the mud is discharged. The water tank 203 is located above the dust settling tank 202. The water supply pipe is equipped with a third control valve 208. The water flow into the spray head 206 is adjusted by adjusting the opening of the third control valve 208, thereby adjusting the spraying speed of the spray head 206 in the dust settling tank 202. The dust settling tank 202 is connected to the vacuum pump 204 through a negative pressure pipe. The negative pressure pipe is equipped with a fourth control valve 209. The vacuum pump 204 provides a negative pressure environment for the entire recycling and environmental protection system 2. The discharge pipe, water supply pipe and negative pressure pipe of the recycling tank 201 are all rigid pipes, preferably φ73*4 seamless steel pipes. The second flexible pipe 205 is preferably a steel wire braided pressure-resistant rubber hose. The software system interlocks the opening and closing of the third control valve 208 and the fourth control valve 209 and the start and stop of the vacuum pump 204. In practical applications, the abrasive, driven by high-speed gas, strikes the surface of pipe 6, removing rust, dirt, and other contaminants. The ejected abrasive, under the influence of gravity, accumulates at the lower part of the protective cover 104. The pressure of the ejected abrasive is set to be much greater than the suction pressure under negative pressure to ensure the impact force of the abrasive. Since the suction port 1045 is located at the lower part of the protective cover 104, the abrasive is sucked into the second flexible pipe 205. After being struck, the rust and dirt are sucked into the second flexible pipe 205 as dust along with the abrasive, and then enter the recovery tank 201. Due to the small space and high pressure inside the second flexible pipe 205, the space inside the recovery tank 201 suddenly increases, the pressure decreases, the abrasive slows down, the heavier abrasive falls, and the lighter dust is sucked into the dust settling tank 202. The spray nozzle 206 above the dust settling tank 202 sprays water mist to condense the dust into mud and discharge it.

[0052] like Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, the motion system 3 includes a track 301 that surrounds and conforms to the pipe 6, a crawler 302 that moves along the track 301, a first motor 303 fixed on the crawler 302, a threaded rod 304 connected to the output shaft of the first motor 303, a slider 305 threadedly connected to the threaded rod 304, and a connecting rod 306 fixedly connected to the crawler 302, extending out of the crawler 302 and passing through the slider 305. Preferably, the longitudinal axes of the threaded rod 304 and the connecting rod 306 are both aligned with the central axis of the pipe 6.

[0053] like Figure 2 , Figure 3 , Figure 4 As shown, track 301 is an annular track formed by two semicircular tracks 3011. Track 301 is preferably coaxial with pipe 6. The semicircular tracks 3011 are preferably bent from I-beams, for example, hot-bent from #16 I-beams (with an I-shaped cross-section). The two semicircular tracks 3011 are hinged. One semicircular track 3011 is fixedly connected to a hinge seat 3012, and the other semicircular track 3011 is connected to a hinge block 3013. The hinge seat 3012 is provided with a hinge shaft 3014, and the hinge block 3013 has a through hole penetrating the hinge shaft 3014. The hinge block 3013 and the hinge seat 3012 rotate relative to each other, realizing the opening and closing action of the two semicircular tracks 3011 (each semicircular track 3011...). The other end (non-connecting end) of the circular track 3011 is free (the two free ends contact each other when closed). Each semi-circular track 3011 includes an arc-shaped inner flange plate 30111 and an outer flange plate 30112, and a web plate 30113 disposed between the inner flange plate 30111 and the outer flange plate 30112. The inner surface of the inner flange plate 30111 is provided with a flexible rubber plate, which is in close contact with the outer surface of the pipe to protect the anti-corrosion layer of the pipe 6 and increase the friction between the semi-circular track 3011 and the pipe 6 to prevent the semi-circular track 3011 from sliding. The inner surfaces of the outer flange plates 30112 on both sides of the web plate 30113 are provided with (annular) tracks 307 laid along the outer flange plates 30112.

[0054] like Figure 2 , Figure 9As shown, two bearing seats 308 are fixed on each semicircular track 3011. The two bearing seats 308 are located on both sides of the hinge point of the semicircular track 3011. A rotating shaft 309 is provided between the two bearing seats 308. The rotating shaft 309 is rotatably or fixedly connected to the bearing seats 308. A rotating rod 3010 is rotatably connected to the rotating shaft 309. The free end of the rotating rod 3010 is connected to a hydraulic rod 3015. The hydraulic rod 3015 slides along the cylinder 3016. The cylinder 3016 is rotatably connected to the lifting device 3017 at the end away from the hydraulic rod 3015. The lifting device 3017 includes a hook 30171, a lifting plate 30172, and a lifting rod 30173. The hook 30171 is fixed above the lifting plate 30172, and the lifting rod 30173 is fixed below the lifting plate 30172. The end of the hydraulic rod 3015 is rotatably connected to the lifting rod 30173, and the hook 30171 is suspended from the cantilever extending from the base 5. In practical applications, the two semi-circular tracks 3011 are hoisted above the pipe 6 that needs to be sandblasted and derusted. The hydraulic rod 3015 retracts, and the two semi-circular tracks 3011 are opened. The two semi-circular tracks 3011 are moved downward to both sides of the pipe 6 and surround the pipe 6. The hydraulic rod 3015 extends, and the two semi-circular tracks 3011 surround the pipe 6. The inner flange plate 30111 is close to the surface of the pipe 6, and the tracks are fixed to the pipe 6.

[0055] like Figure 2 , Figure 4 , Figure 6 , Figure 7 As shown, the crawler 302 includes a body 3021, two opposing wheels 3022, and a frame 3023 connecting the wheels 3022 and the body 3021. The lower surface of the body 3021 is arc-shaped and fits against the outer surface of the outer flange 30112 (the arc-shaped surface of the lower surface of the body matches the outer arc surface of the outer flange). A wheel 3022 is provided on each side of the web 30113. The outer circumference of the wheel 3022 is provided with teeth 3024 that match the track 307. The wheels 3022 are connected to axles, and the axles are used to drive the axle to rotate. The second motor 3025 is connected to the software system. The second motor 3025 is a bidirectional stepper motor. The second motor 3025 is connected to the software system. The frame 3023 is C-shaped and spans the outer flange 30112. The frame 3023 includes two parallel support rods and an intermediate rod connecting the two support rods. The two support rods are respectively connected to the vehicle body 3021 and the second motor 3025. The first motor 303 and the connecting rod 306 are both fixed to the vehicle body 3021. The first motor 303 is connected to the software system. The first motor 303 can be, for example, a bidirectional stepper motor.

[0056] like Figure 5As shown, the slider 305 has a threaded hole that matches the threaded rod 304 and a through hole for the connecting rod 306 to pass through. The lower part of the slider 305 is connected to the sleeve of the telescopic rod 109. In specific applications, on the one hand, the first motor 303 rotates, driving the threaded rod 304 to rotate. The threaded rod 304 drives the slider 305 to move along the connecting rod 306. The slider 305 drives the protective cover to move along the axial direction of the pipe 6. On the other hand, the second motor 3025 rotates, driving the wheel 3022 to rotate, driving the vehicle body 3021 to move along the track. The vehicle body 3021 drives the slider 305 to make a circular motion, and then carries the protective cover 104 to make a circular motion. The first motor 303 and the second motor 3025 jointly control the protective cover 104 to be positioned at the location of the pipe 6 that needs to be sandblasted and derusted.

[0057] like Figure 5 , Figure 6 , Figure 7 As shown, the measuring system 4 includes a bracket 401 fixed to the slider 305, a third motor 402 fixed to the bracket 401 and connected to the software system, a cam 403 connected to the power shaft of the third motor 402, a moving rod 404 located below the cam 403 and extending out of the slider 305, a remote anchor pattern meter 405 fixed to the end of the moving rod 404 and connected to the information input terminal of the software system, a fulcrum 406 located on the slider 305 and used to support the moving rod 404, and a spring 407 connecting the moving rod 404 and the slider 305. The bracket 401 is inverted L-shaped, the cam 403 is equilateral triangular in shape, the cam 403 is suspended and connected to the third motor 402, the cam 403 abuts against one end of the moving rod 404, the fulcrum 406 is a portal frame, and the moving rod 404... A crossbeam is rotatably connected to fulcrum 406, which is located between spring 407 and cam 403. The moving rod 404 is a zigzag shape. In specific applications, under the elastic force of spring 407, the moving rod 404 is pulled downward to rotate, so that the remote anchor pattern instrument 405 contacts the pipe 6 to inspect the surface of the pipe 6 after rust removal. The third motor 402 drives cam 403 to rotate, pressing one end of the moving rod 404. The moving rod 404 rotates around fulcrum 406, causing the other end of the moving rod 404 to lift up, thereby making the remote anchor pattern instrument 405 move away from the pipe 6 and be in a suspended state. Since the bracket 401, fulcrum 406 and spring 407 are all set on slider 305, the first motor 303 and the second motor 3025 jointly control the detection position of the remote anchor pattern instrument 405.

[0058] The software system, for example, uses an industrial computer as a carrier. The software system includes a database, a computing module, and a driver. The database stores the rotation angle and frequency data of the first motor 303, the second motor 3025, and the third motor 402, the measurement point positioning data, the anchor pattern depth range data that meets the specifications, and the moving speed, stroke, angle, and reset start point data of the crawler 302. The computing module performs logical operations on the data and generates execution commands. The driver uses the first motor 303, the second motor 3025, the third motor 402, the remote anchor pattern meter 405, the sandblasting system 1, and the recycling and environmental protection system 2. The data measured by the remote anchor pattern meter 405 is compared with the stored data to determine whether the surface of the pipe 6 after sandblasting meets the specifications. If it meets the specifications, the sandblasting continues to the next location. If it does not meet the specifications, the second motor 3025 and the first motor 303 are controlled to rotate in opposite directions to return to the unqualified detection point and the sandblasting operation is performed again.

[0059] like Figure 10 As shown, the base 5 can be, for example, a steel frame, which is installed on a vehicle such as a car or tractor. The air compressor 101, pressure stabilizing tank 102, sand storage tank 103, recovery tank 201, dust suppression tank 202, and vacuum pump 204 are fixed on the frame. The frame is, for example, made of narrow-flange H-beams with HN200*100mm specifications.

[0060] The working process of the fully automatic sandblasting and rust removal environmental protection device for pipelines according to this utility model includes:

[0061] (1) Hoist the two semi-circular rails 3011 above the pipe 6 that needs to be sandblasted and derusted. The hydraulic rod 3015 retracts and the two semi-circular rails 3011 open. Move the two semi-circular rails 3011 downward to both sides of the pipe 6 and surround the pipe 6. The hydraulic rod 3015 extends and the two semi-circular rails 3011 surround the pipe 6. The inner flange plate 30111 is close to the surface of the pipe 6 and the rails are fixed on the pipe 6.

[0062] (2) Start the first motor 303 and the second motor 3025, adjust the position of the slider 305 so that the protective cover 104 is facing the position that needs to be sandblasted and rusted, and turn off the first motor 303 and the second motor 3025.

[0063] (3) Start the air compressor 101, pressure tank 102, open the first control valve 108, start the vacuum pump 204, open the third control valve 208 and the fourth control valve 209, start sandblasting and rust removal on the pipeline 6, set the working time of the air compressor 101, pressure tank 102 and vacuum pump 204, and turn off the air compressor 101, pressure tank 102 and vacuum pump 204 at the set end time, close the first control valve 108, the third control valve 208 and the fourth control valve 209, and end the sandblasting and rust removal.

[0064] (4) Restart the first motor 303 and the second motor 3025 to adjust the position of the slider 305 so that the remote anchor pattern instrument 405 is facing the position where sandblasting and rust removal have been completed. Turn off the first motor 303 and the second motor 3025, start the third motor 402, and the cam 403 rotates to release the pressure on the moving rod 404. Under the elastic force of the spring 407, the moving rod 404 is pulled down to rotate and contact the pipe 6. The surface of the rust-removed pipe 6 is inspected. After the inspection is completed, the third motor 402 is rotated in the opposite direction to press one end of the moving rod 404. The remote anchor pattern instrument 405 moves away from the pipe 6. The remote anchor pattern instrument 405 transmits the measured data to the software system and compares it with the stored data to determine whether the surface of the sandblasted and rust-removed pipe 6 meets the specifications. If it meets the specifications, repeat steps (2) and (3).

[0065] (5) If it does not meet the specifications, turn on and adjust the first motor 303 and the second motor 3025 again so that the protective cover 104 returns to the position where the test is not qualified. Turn off the first motor 303 and the second motor 3025 and repeat steps (3) and (4) until the measured data meets the specifications.

[0066] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A fully automatic sandblasting and rust removal environmental protection device for pipelines, characterized in that, It includes a sandblasting system (1) for high-speed abrasive spraying to remove rust, a recycling and environmental protection system (2) for abrasive recovery and dust treatment, an action system (3) for fully automatic operation of sandblasting, a software system for data processing and driving hardware, and a measurement system (4) for quality inspection. The abrasive input end of the action system (3) is connected to the sandblasting system (1), and the abrasive output end of the action system (3) is connected to the recycling and environmental protection system (2). The measurement system (4) is set on the action system (3), and the measurement system (4) is connected to the data input end of the software system. The action system (3) is connected to the data output end of the software system. The action system (3), the sandblasting system (1), and the recycling and environmental protection system (2) are all skid-mounted on the base (5).

2. The fully automatic sandblasting and rust removal environmental protection device for pipelines according to claim 1, characterized in that, The sandblasting system (1) includes an air compressor (101) for pressurizing gas, a pressure stabilizing tank (102) for stabilizing gas pressure, a sand storage tank (103) for storing abrasive, a protective cover (104) covering the pipe (6), and a nozzle for spraying abrasive. The gas output pipe of the air compressor (101) is connected to the gas inlet of the pressure stabilizing tank (102), the gas outlet of the pressure stabilizing tank (102) is connected to one end of the gas delivery pipe (106), and the other end of the gas delivery pipe (106) is connected to the first flexible pipe (107). The discharge port of the first flexible pipe (107) is connected to the nozzle, which is mounted on the protective cover (104). The discharge pipe at the bottom of the sand storage tank (103) merges with the gas transmission pipe (106). The discharge pipe of the sand storage tank (103) is equipped with a first control valve (108). The gas output pipe of the air compressor (101), the gas transmission pipe (106), and the discharge pipe of the sand storage tank (103) are all rigid pipes. The software system interlocks the opening and closing of the first control valve (108) and the start and stop of the pressure stabilizing tank (102) and the air compressor (101).

3. The fully automatic sandblasting and rust removal environmental protection device for pipelines according to claim 2, characterized in that, The protective cover (104) is an arc-shaped body. The protective cover (104) includes a frame and a cover plate (1043). The frame is composed of two parallel arc-shaped plates (1041) and two strip plates (1042) connected between the arc-shaped plates (1041). The inner curvature of the arc-shaped plates (1041) is the same as that of the pipe (6). The cover plate (1043) is a curved plate. The cover plate (1043) is connected to the outer arc of the arc-shaped plates (1041) and the outer edge of the strip plates (1042). The cover plate (1043) has a sandblasting port (1044) and a sand suction port (1045). The sandblasting port (1044) is connected to the nozzle. The outer surface of the cover plate (1043) is connected to the telescopic rod (109).

4. The fully automatic pipeline sandblasting and rust removal environmental protection device according to claim 3, characterized in that, The recycling and environmental protection system (2) includes a recycling tank (201) for recycling abrasives, a dust collection tank (202) for dust removal, a water tank (203) for storing water, and a vacuum pump (204) for providing negative pressure. The inlet of the recycling tank (201) and the sand suction port (1045) are connected by a second flexible pipe (205), which serves as the recycling pipe for recycling abrasives. The inlet of the recycling tank (201) is located at the bottom of the recycling tank (201). The outlet pipe at the bottom of the recycling tank (201) is connected to the sand storage tank (103). The recycling tank (201) is located above the sand storage tank (103). A second control valve is provided on the outlet pipe of the recycling tank (201). The dust output pipe at the top of the recycling tank (201) is connected to the dust collection tank (202). The interior is equipped with a spray head (206), which is connected to the water tank (203) via a water supply pipe. The bottom of the dust settling tank (202) is equipped with a mud discharge pipe (207), which is equipped with a fifth control valve. The water tank (203) is located above the dust settling tank (202), and the water supply pipe is equipped with a third control valve (208). The dust settling tank (202) is connected to the vacuum pump (204) via a negative pressure pipe, and the negative pressure pipe is equipped with a fourth control valve (209). The vacuum pump (204) provides a negative pressure environment for the entire recycling and environmental protection system (2). The discharge pipe, water supply pipe and negative pressure pipe of the recycling tank (201) are all rigid pipes. The software system interlocks the opening and closing of the third control valve (208) and the fourth control valve (209) and the start and stop of the vacuum pump (204).

5. The fully automatic sandblasting and rust removal environmental protection device for pipelines according to any one of claims 1-4, characterized in that, The motion system (3) includes a track (301) that surrounds and fits the pipe (6), a crawler (302) that moves along the track, a first motor (303) fixed on the crawler (302), a threaded rod (304) connected to the output shaft of the first motor (303), a slider (305) threadedly connected to the threaded rod (304), and a connecting rod (306) fixedly connected to the crawler (302), extending out of the crawler (302) and passing through the slider (305). The threaded rod (304) and the connecting rod (306) are both parallel to the central axis of the pipe (6).

6. The fully automatic pipeline sandblasting and rust removal environmental protection device according to claim 5, characterized in that, The track (301) is a ring track formed by two semicircular tracks (3011) enclosing each other. The track (301) is coaxial with the pipe (6). The two semicircular tracks (3011) are hinged together. One semicircular track (3011) is fixedly connected to the hinge seat (3012), and the other semicircular track (3011) is connected to the hinge block (3013). The hinge seat (3012) is provided with a hinge shaft (3014), and the hinge block (3013) has a through hole that passes through the hinge shaft (3014). The hinge block (3013) and the hinge seat (3012) are connected together. 12) Relative rotation enables the opening and closing of two semicircular tracks (3011). Each semicircular track (3011) includes an arc-shaped inner flange plate (30111) and an outer flange plate (30112), and a web plate (30113) disposed between the inner flange plate (30111) and the outer flange plate (30112). The inner surface of the inner flange plate (30111) is provided with a flexible rubber plate, and the inner surfaces of the outer flange plates (30112) on both sides of the web plate (30113) are provided with tracks (307) laid along the outer flange plates (30112). Two bearings (308) are fixed on each semi-circular track (3011). A rotating shaft (309) is provided between the two bearings (308). A rotating rod (3010) is rotatably connected to the rotating shaft (309). The free end of the rotating rod (3010) is connected to a hydraulic rod (3015). The hydraulic rod (3015) slides along the cylinder (3016). The end of the cylinder (3016) away from the hydraulic rod (3015) is rotatably connected to the lifting device (3017).

7. The fully automatic sandblasting and rust removal environmental protection device for pipelines according to claim 6, characterized in that, The crawler (302) includes a body (3021), two opposing wheels (3022), and a frame (3023) connecting the wheels (3022) and the body (3021). The lower surface of the body (3021) is arc-shaped and fits against the outer surface of the outer flange (30112). A wheel (3022) is provided on each side of the web (30113). The outer circumference of each wheel (3022) is provided with teeth (3024) that match the tracks (307). The wheels (3022) are connected to axles, and the axles are connected to a second motor (3025) for rotating the axles. 5) Connected to the software system, the frame (3023) is C-shaped and spans the outer flange (30112). The frame (3023) includes two parallel support rods and an intermediate rod connecting the two support rods. The two support rods are connected to the vehicle body (3021) and the second motor (3025) respectively. The first motor (303) and the connecting rod (306) are both fixed on the vehicle body (3021). The first motor (303) is connected to the software system. The slider (305) has a threaded hole that matches the threaded rod (304) and a through hole for the connecting rod (306) to pass through. The slider (305) is connected to the telescopic rod (109) below.

8. The fully automatic sandblasting and rust removal environmental protection device for pipelines according to claim 7, characterized in that, The measuring system (4) includes a bracket (401) fixed on the slider (305), a third motor (402) fixed on the bracket (401) and connected to the software system, a cam (403) connected to the power shaft of the third motor (402), a moving rod (404) located below the cam (403) and extending out of the slider (305), a remote anchor pattern gauge (405) fixed to the end of the moving rod (404) and connected to the information input terminal of the software system, and a fulcrum located on the slider (305) for supporting the moving rod (404). 406) A spring (407) is connected between the moving rod (404) and the slider (305). The bracket (401) is inverted L-shaped. The cam (403) is in the shape of an equilateral triangle. The cam (403) is suspended and connected to the third motor (402). The cam (403) abuts against one end of the moving rod (404). The fulcrum (406) is a portal frame. The moving rod (404) is rotatably connected to the crossbeam of the fulcrum (406). The fulcrum (406) is set between the spring (407) and the cam (403). The moving rod (404) is a broken line shape.

9. The fully automatic sandblasting and rust removal environmental protection device for pipelines according to claim 1, characterized in that, The software system uses an industrial computer as its platform and includes a database, computing modules, and drivers.

10. The fully automatic sandblasting and rust removal environmental protection device for pipelines according to claim 1, characterized in that, The base (5) is a steel structure frame, and the air compressor (101), pressure stabilizing tank (102), sand storage tank (103), recovery tank (201), dust settling tank (202), and vacuum pump (204) are fixed on the frame.

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