An automatic conveying system for finishing and testing small-diameter steel pipes

Abstract

The present invention relates to the technical field of metallurgical equipment. The technical solution is: an automatic conveying system for finishing and testing small-diameter steel pipes, characterized by comprising a frame, an input roller table horizontally arranged at the outlet of a steel pipe forming unit and conveying steel pipes from left to right, a material turning mechanism horizontally arranged at the outlet of the input roller table, several groups of inclined material racks parallel to each other and tiltedly arranged in front of the material turning mechanism, an airtight test mechanism horizontally installed at the outlet of each inclined material rack, several groups of transition material racks parallel to each other and tiltedly arranged in front of the airtight test mechanism, a feed roller table horizontally arranged at the outlet of each transition material rack, a flaw detection control room arranged at the outlet of the feed roller table, a discharging roller table horizontally arranged at the outlet of the flaw detection control room, several groups of rear transition material racks parallel to each other and tiltedly arranged at the rear of the discharging roller table, and several groups of inspection material racks parallel to each other and horizontally arranged at the outlet of each rear transition material rack. The system can realize the automatic conveying of small-diameter steel pipes between various finishing processes.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical equipment, in particular to a small-diameter steel pipe and an automatic detection, finishing and conveying system. Background Art

[0002] Steel pipes have high strength and excellent mechanical properties and are widely used in heat exchange equipment such as shell and tube heat exchangers, coil heat exchangers, serpentine heat exchangers, condensers, evaporators and transmission pipelines.

[0003] The steel pipes coming out of the steel pipe forming unit need to go through a series of processes such as air tightness test, flaw detection inspection, manual inspection, etc. If a crane is used for lifting between each process, it is time-consuming, labor-intensive, and unsafe. In addition, it is easy to bump and scratch during the process of moving up and down. Especially for some steel pipes with small diameter, thin wall, and long length, it is even more difficult to achieve by crane lifting. Therefore, in order to improve production efficiency and reduce labor intensity, it is necessary to realize the automatic transportation of steel pipes between each process according to the needs of the production process, avoid damage during transportation, and improve the steel pipe yield and the level of automation of production. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide an automatic conveying system for finishing and testing small-diameter steel pipes to realize the automatic conveying of small-diameter steel pipes between various finishing processes.

[0005] The technical solution provided by the present invention is:

[0006] An automatic conveying system for finishing and testing small-diameter steel pipes, characterized by comprising a frame, an input roller table horizontally arranged at the outlet of a steel pipe forming unit and conveying steel pipes from left to right, a turning mechanism horizontally arranged at the outlet of the input roller table for preliminary sorting of steel pipes, a plurality of inclined material racks parallel to each other and obliquely arranged at the front side of the turning mechanism, an airtightness test mechanism horizontally installed at the outlet of each inclined material rack to detect the airtightness of the steel pipe, a plurality of transition material racks parallel to each other and obliquely arranged at the front side of the airtightness test mechanism, and a feed material rack horizontally arranged at the outlet of each transition material rack. A roller conveyor, a flaw detection control room arranged at the outlet of the feed roller conveyor for flaw detection of steel pipes, a discharging roller conveyor horizontally arranged at the outlet of the flaw detection control room, a plurality of groups of rear transition racks arranged parallel to each other and obliquely at the rear side of the discharging roller conveyor, and a plurality of groups of inspection racks arranged parallel to each other and horizontally at the outlet of each rear transition rack for collecting qualified steel pipes; the conveying roller conveyor, the turning mechanism, the airtightness test mechanism, the feed roller conveyor and the discharging roller conveyor are all arranged in the left-right direction; the inclined lower rack, the transition rack, the rear transition rack and the inspection rack are all arranged in the front-back direction.

[0007] The input roller table includes a plurality of V-shaped wheels rotatably positioned on the frame and arranged at equal intervals along the conveying direction of the steel pipe, a support fixed on the frame, a motor seat hinged to the support, a reduction motor fixed to the motor seat, a pressure wheel fixedly connected to the output shaft of the reduction motor, a swing cylinder whose base is hinged to the frame and whose push rod is hinged to the motor seat to drive the reduction motor to swing in a vertical plane, and an adjusting bolt vertically installed on the side of the motor support to limit the swing angle of the reduction motor; the pressure wheel is arranged above each V-shaped wheel and corresponds to the position of the steel pipe so that the pressure wheel can press and convey the steel pipe when it swings integrally with the reduction motor; a rubber ring is installed on the outer periphery of the pressure wheel.

[0008] The material turning mechanism comprises a turning plate which is adapted to the height of the V-shaped wheel and can be swung around a horizontal axis arranged in the left and right directions and is positioned on the frame to screen qualified steel pipes and unqualified steel pipes, two groups of turning components which are respectively arranged at both ends of the turning plate to synchronously drive the turning plate to swing, and a first unqualified product rack which is arranged at the rear side of the turning plate to receive unqualified steel pipes; a first protective layer is arranged on the surface of the turning plate;

[0009] The two groups of material turning components have the same structure; each group of material turning components includes a left cylinder whose base is hinged on the frame and whose push rod is hinged to the bottom of the front side of the material turning plate, and a right cylinder whose base is hinged on the frame and whose push rod is hinged to the bottom of the rear side of the material turning plate.

[0010] The inclined unloading rack includes a vertically arranged column whose bottom can move left and right through a rolling pair, a first inclined bar frame obliquely fixed on the top of the column, a second protective layer arranged on the surface of the first inclined bar frame, and a stopper arranged at the outlet of the first inclined bar frame to position the steel pipe.

[0011] Several turntables are arranged at intervals on the air-tightness test mechanism; the turntable can rotate around a horizontal axis arranged in the left and right directions; a number of material picking hooks are evenly arranged on the outer circumference of the turntable, and the positions of the material picking hooks are adapted to the positions of the steel pipes at the front end of the first inclined bar rack, so as to sequentially pick the steel pipes on the first inclined bar rack into the turntable; an inclined plate located at the turntable outlet is obliquely fixed on the frame to transport the steel pipes that have completed the air-tightness test; a second unqualified product rack is arranged at the lower front part of the air-tightness test mechanism to receive the steel pipes that fail the air-tightness test.

[0012] The transition material rack includes a second inclined bar rack obliquely fixed on the frame, a first sorting plate arranged above the second unqualified product rack and swingably positioned at the inlet end of the second inclined bar rack to open or cover the second unqualified product rack, a first sorting cylinder whose base is fixed on the frame and whose push rod drives the first sorting plate to swing through the first connecting rod, and a stop block arranged at the outlet of the second inclined bar rack and whose height can be vertically adjusted.

[0013] The feed roller table includes a plurality of first rollers which are arranged at intervals in the left-right direction and rotatably positioned on the frame, a feed transmission motor which is installed on the frame and drives the first rollers to rotate, an input shifting block which is arranged at the rear side of the feed roller table and is swingably positioned on the frame so as to shift the steel pipes on the second inclined bar frame into the first rollers, and a feed cylinder whose base is hinged on the frame and whose push rod is hinged to the input shifting block so as to drive the input shifting block to swing.

[0014] The discharging roller conveyor comprises a plurality of second rollers which are arranged at intervals in the left-right direction and rotatably positioned on the frame, a discharging transmission motor which is mounted on the frame and drives the second rollers to rotate, an output material shifting block which is arranged at the rear side of the discharging roller conveyor and is swingably hinged on the frame so as to shift the steel pipes on the second rollers into the next station, and a discharging cylinder whose base is hinged on the frame and whose push rod is hinged to the output material shifting block so as to drive the output material shifting block to swing.

[0015] A third unqualified product rack is provided between the rear transition rack and the discharging roller to receive steel pipes that fail the flaw detection.

[0016] The rear transition material rack includes a third inclined bar rack obliquely fixed on the frame, a second sorting plate arranged above the third unqualified product rack and one end of which is swingably positioned at the inlet end of the third inclined bar rack to open or cover the third unqualified product rack, and a second sorting cylinder whose base is fixed on the frame and whose push rod drives the second sorting plate to swing through a second connecting rod.

[0017] The beneficial effects of the present invention are:

[0018] The automatic conveying system of the present invention can realize the automatic conveying of small-diameter steel pipes between finishing and testing processes according to the needs of the steel pipe production process, avoid damage to the steel pipes during conveying, improve the steel pipe yield and the automation level of production, and reduce the labor intensity. In addition, the present invention has a compact structure, convenient operation, reliable operation, convenient control, and is suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention from above.

[0020] Figure 2 for Figure 1 Schematic diagram of the AA cross-section structure.

[0021] Figure 3 for Figure 1 Schematic diagram of the BB cross-section structure.

[0022] Figure 4 This is a schematic diagram of the left view of the input roller table.

[0023] Figure 5 for Figure 4 Schematic diagram of the CC cross-section structure.

[0024] Figure 6 It is a schematic diagram of the main structure of the material turning mechanism.

[0025] Figure 7 for Figure 6 Schematic diagram of the DD cross-section structure.

[0026] Figure 8 This is a schematic diagram of the left view of the inclined frame.

[0027] Fig. 9 It is a left view structural schematic diagram of the airtight testing machine.

[0028] Fig.10 This is a schematic diagram of the left view structure of the transition rack.

[0029] Fig.11 It is a schematic diagram of the left view of the feed roller table.

[0030] Fig.12 It is a schematic diagram of the left view of the discharge roller.

[0031] Fig.13 It is a schematic diagram of the left view of the rear transition rack and inspection rack.

[0032] Figure Number:

[0033] 1. Frame;

[0034] 2. Input roller; 2-1. V-shaped wheel; 2-2. Support; 2-3. Motor seat; 2-4. Speed ​​reduction motor; 2-5. Pressure wheel; 2-6. Swing cylinder; 2-7. Adjusting bolt; 2-8. Rubber ring; 2-9. Output shaft;

[0035] 3. Material turning mechanism; 3-1. Material turning plate; 3-2. First unqualified material rack; 3-3. Left cylinder; 3-4. Right cylinder; 3-5. First protective layer;

[0036] 4. Inclined unloading rack; 4-1. Vertical column; 4-2. First inclined bar rack; 4-3. Second protective layer; 4-4. Stopper; 4-5. Roller; 4-6. Guide rail; 4-7. Clamping bolt;

[0037] 5. Airtightness test mechanism; 5-1. Turntable; 5-2. Material picking hook; 5-3. Second unqualified product rack; 5-4. Inclined plate;

[0038] 6. Transition rack; 6-1. Second inclined rack; 6-2. First sorting plate; 6-3. First sorting cylinder; 6-4. Stop block;

[0039] 7. Feed roller; 7-1. First roller; 7-2. Feed transmission motor; 7-3. Input shifting block; 7-4. Feed cylinder;

[0040] 8. NDT control room;

[0041] 9. Discharging roller; 9-1. Second roller; 9-2. Discharging transmission motor; 9-3. Output shifting block; 9-4. Discharging cylinder;

[0042] 10. Rear transition rack; 10-1. Third oblique rack; 10-2. Second sorting plate; 10-3. Second sorting cylinder; 10-4. Third unqualified product rack;

[0043] 11. Check the material rack; 12. Check the steel pipe. DETAILED DESCRIPTION

[0044] The following is a further description with reference to the embodiments shown in the accompanying drawings.

[0045] For the convenience of description, Figure 1 The left side is left, the right side is right, the upper side is back, and the lower side is front; Figure 1 The direction perpendicular to the paper plane is downward, Figure 1 The direction perpendicular to the paper and outwards is up.

[0046] like Figures 1 to 3 The small-diameter steel pipe finishing and testing automatic conveying system shown in the figure includes a frame 1, an input roller 2, a material turning mechanism 3, several groups of inclined material racks 4, an airtight test mechanism 5, several groups of transition material racks 6, a feed roller 7, a flaw detection control room 8, a discharge roller 9, several groups of rear transition material racks 10 and several groups of inspection material racks 11; wherein, the number of inclined material racks, transition material racks, rear transition material racks and inspection material racks is determined according to actual conditions (such as the length of the steel pipe). The conveying rollers, the material turning mechanism, the airtight test mechanism, the feed rollers and the discharge rollers are all arranged in the left-right direction; the inclined material racks, the transition material racks, the rear transition material racks and the inspection material racks are all arranged in the front-back direction.

[0047] like Figure 4 , Figure 5As shown, the input roller is arranged at the exit of the steel pipe forming unit (not shown in the figure) and conveys the steel pipe 12 from left to right. The input roller includes a plurality of V-shaped wheels 2-1 (the number of V-shaped wheels is determined according to the actual situation), a support 2-2, a motor seat 2-3, a reduction motor 2-4, a pressure wheel 2-5, a swing cylinder 2-6 and an adjusting bolt 2-7. Each V-shaped wheel can be rotatably positioned on the frame and arranged at equal intervals along the conveying direction of the steel pipe (i.e., the left and right direction). The support is fixed on the frame; the bottom of the motor seat is hinged to the support; the reduction motor is fixed to the motor seat; the base of the swing cylinder is hinged to the frame, and the push rod of the swing cylinder is hinged to the motor seat, so that the reduction motor is driven to swing in the vertical plane through the swing cylinder. The pressure wheel is fixedly connected to the output shaft 2-9 of the reduction motor; wherein, the pressure wheel is arranged above each V-shaped wheel and corresponds to the position of the steel pipe, so that the pressure wheel presses the steel pipe when swinging with the reduction motor, and the pressure wheel rotates under the drive of the reduction motor to realize the transportation of the steel pipe; a rubber ring 2-8 is installed on the periphery of the pressure wheel to prevent the pressure wheel from damaging the surface of the steel pipe when transporting the steel pipe. The adjusting bolt is vertically installed on the side of the motor support, and the swing angle of the reduction motor can be limited by changing the height of the adjusting bolt, thereby ensuring that the pressure wheel can press steel pipes of different diameters.

[0048] like Figure 6 , Figure 7 As shown, the material turning mechanism is horizontally arranged at the exit of the input roller table, and is used for preliminary sorting of steel pipes with obvious defects. The material turning mechanism includes a material turning plate 3-1, two groups of material turning components and a first unqualified material rack 3-2. The material turning plate is adapted to the height of the V-shaped wheel, and the material turning plate can be swung and positioned on the frame around a horizontal axis arranged in the left and right directions, so as to sort qualified steel pipes and unqualified steel pipes; the surface of the material turning plate is provided with a first protective layer 3-5 to avoid damaging the surface of the steel pipe; the first protective layer is made of polytetrafluoroethylene plate. Two groups of material turning components are respectively arranged at both ends of the material turning plate to synchronously drive the material turning plate to swing; the two groups of material turning components have the same structure, and each group of material turning components includes a left cylinder 3-3 and a right cylinder 3-4. The base of the left cylinder is hinged on the frame and its push rod is hinged to the bottom of the front side of the material turning plate; the base of the right cylinder is hinged on the frame and its push rod is hinged to the bottom of the rear side of the material turning plate. The first unqualified product rack is arranged at the rear side of the flipping plate, and is used to receive unqualified steel pipes with obvious defects. During operation, if the steel pipe coming out of the forming unit has obvious defects, the left cylinder drives the flipping plate to swing to one side of the first unqualified product rack, so that the steel pipe falls into the first unqualified product rack; if the steel pipe has no obvious defects, the right cylinder drives the flipping plate to tilt to the side of the inclined lower rack, so as to carry out subsequent inspection procedures on the steel pipe.

[0049] like Figure 8As shown, each inclined material rack is parallel to each other and is obliquely arranged at the front side of the material turning mechanism; each group of inclined material racks includes a column 4-1, a first oblique bar frame 4-2, a second protective layer 4-3 and a stopper 4-4. The column is arranged vertically and a roller 4-5 is arranged at the bottom. A guide rail 4-6 is fixed on the ground along the left and right directions. The roller and the guide rail form a rolling pair so that the distance between two adjacent groups of inclined material racks can be adjusted according to the length of the steel pipe. The first oblique bar frame is obliquely fixed on the top of the column; the first oblique bar frame is fixed and clamped at the outlet end of the material turning mechanism by a clamping bolt 4-7. The second protective layer is arranged on the first oblique bar frame to protect the outer surface of the steel pipe; the material of the second protective layer is rubber or plastic. The stopper is arranged at the outlet end of the first oblique bar frame to locate the position of the steel pipe.

[0050] like Fig. 9 As shown, the airtightness test mechanism is horizontally installed at the outlet of each inclined material rack to detect the airtightness of the steel pipe. In the airtightness test mechanism of this embodiment, the part for airtightness test of the steel pipe is a conventional structure and can be obtained by external purchase. The airtightness test mechanism is provided with a plurality of turntables 5-1 at intervals; each turntable can rotate around a horizontal axis arranged in the left and right directions, and a plurality of (eight in the figure) material picking hooks 5-2 are evenly opened on the outer circumference of each turntable, and the position of the material picking hook is adapted to the position of the steel pipe at the front end of the first inclined bar rack, so that the steel pipe on the first inclined bar rack can be sequentially dialed into the turntable, which is convenient for the airtightness test mechanism to test the steel pipe; in this embodiment, the turntable can dial in up to four steel pipes for airtightness test at the same time. The frame is obliquely fixed with an inclined plate 5-4 located at the outlet of the turntable to transport the steel pipe that has completed the airtightness test. A second unqualified material rack 5-3 is provided at the lower front side of the airtightness test mechanism to receive steel pipes that fail the airtightness test.

[0051] like Fig.10 As shown, each transition material rack is parallel to each other and is tiltedly arranged at the front side of the airtight test mechanism; each group of transition material racks includes a second inclined bar rack 6-1, a first sorting plate 6-2, a first sorting cylinder 6-3 and a material stopper 6-4. The second inclined bar rack is tilted and fixed on the frame; the stopper block is arranged at the outlet of the second inclined bar rack, and the height of the stopper block can be adjusted vertically so as to adjust the position of the stopper block according to the diameter of the steel pipe to ensure that the steel pipes are arranged in sequence on the second inclined bar rack, so as to perform flaw detection on the steel pipes in sequence. The first sorting plate is arranged above the second unqualified material rack, and the first sorting plate can be swingably positioned at the inlet end of the second inclined bar rack to open or cover the second unqualified material rack; in the initial position, the first sorting plate is connected to the inclined plate, and the inclination angle of the first sorting plate is the same as the inclination angle of the inclined plate. The base of the first sorting cylinder is fixed on the frame, and the push rod of the first sorting cylinder drives the first sorting plate to swing through the first connecting rod.

[0052] During operation, the steel pipes that have completed the air-tightness test fall from the inclined plate in turn. When the steel pipe is an unqualified pipe, the first sorting cylinder extends, driving the first sorting plate to rotate upward, thereby opening the second unqualified product rack and allowing the unqualified pipe to fall into the second unqualified product rack; when the steel pipe is a qualified pipe, the first sorting plate covers the second unqualified product rack, and the steel pipe rolls directly onto the transition rack along the inclined plate and the first sorting plate for subsequent flaw detection.

[0053] like Fig.11 As shown, the feed roller is horizontally arranged at the exit of each transition material rack; the feed roller includes a plurality of first rollers 7-1 (the number of the first rollers is determined according to the actual situation), a feed drive motor 7-2, an input material shifting block 7-3 and a feed cylinder 7-4. The first rollers are arranged at intervals in the left and right directions and are rotatably positioned on the frame; the feed drive motor is installed on the frame and drives the first rollers to rotate synchronously; in this embodiment, a belt drive is used between the feed drive motor and the first rollers. The input material shifting block is arranged at the rear side of the feed roller and is swingably positioned on the frame so as to shift the steel pipe on the second inclined bar rack into the first roller. The base of the feed cylinder is hinged on the frame, and the push rod of the feed cylinder is hinged to the input material shifting block to drive the input material shifting block to swing. During operation, the feed cylinder drives the input material block to push a steel pipe from the transition material rack into the feed roller each time, and then the feed transmission motor drives the first rollers to rotate and transport the steel pipe to the flaw detection control room for flaw detection.

[0054] like Fig.12 As shown, the discharging roller is horizontally arranged at the exit of the flaw detection control room; the discharging roller includes a plurality of second rollers 9-1 (the number of the second rollers is determined according to the actual situation), a discharging drive motor 9-2, an output material shifting block 9-3 and a discharging cylinder 9-4. Each second roller is arranged at a distance in the left and right directions and is rotatably positioned on the frame; the discharging drive motor is installed on the frame to drive the second rollers to rotate synchronously; in this embodiment, a belt drive is adopted between the discharging drive motor and the second rollers. The output material shifting block is arranged at the rear side of the discharging roller and is swingably positioned on the frame so as to shift the steel pipe on the second roller into the next station (i.e., the inspection rack). The base of the discharging cylinder is hinged on the frame, and the push rod of the discharging cylinder is hinged to the output material shifting block to drive the output material shifting block to swing.

[0055] like Fig.13As shown, a third unqualified product rack 10-4 is arranged between the rear transition rack and the discharge roller to receive steel pipes that fail the flaw detection. The rear transition racks are parallel to each other and obliquely arranged at the rear side of the discharge roller; the rear transition rack includes a third inclined bar rack 10-1, a second sorting plate 10-2 and a second sorting cylinder 10-3. The third inclined bar rack is obliquely fixed on the frame; the second sorting plate is arranged above the third unqualified product rack and can be swingably positioned at the inlet end of the third inclined bar rack to open or cover the third unqualified product rack; in the initial position, the second sorting plate covers the third unqualified product rack. The base of the second sorting cylinder is fixed on the frame, and the push rod of the second sorting cylinder drives the second sorting plate to swing through the second connecting rod.

[0056] During operation, the discharging transmission motor drives the second rollers to rotate, and the steel pipes coming out of the flaw detection control room are transported to the designated position of the discharging roller. Then the discharging cylinder drives the output material block to swing, and the steel pipes that have completed the flaw detection are pulled out from the discharging roller. When the steel pipe is unqualified, the second sorting cylinder extends, driving the second sorting plate to rotate upward, thereby opening the third unqualified product rack, and the unqualified pipe falls into the third unqualified product rack; when the steel pipe is qualified, the second sorting plate covers the third unqualified product rack, and the steel pipe rolls onto the inspection rack through the rear transition rack for subsequent manual inspection and collection of the steel pipe.

[0057] Preferably, the inclination angles between the first oblique bar frame, the second oblique bar frame and the third oblique bar frame and the horizontal plane are 2° to 3° to ensure that the steel pipe rolls smoothly under the action of gravity.

[0058] The above airtight test mechanisms, all cylinders and motors are electrically connected to a PLC controller (not shown in the figure) to ensure the coordination of the working of each mechanism.

[0059] The working mode of the present invention is as follows:

[0060] When the small-diameter steel pipe comes out of the forming unit, the swing cylinder in the input roller table drives the reduction motor on the motor seat to swing around the support, so that the pressure wheel installed on the output shaft of the reduction motor presses the steel pipe, and the steel pipe is transported to the specified position of the input roller table under the drive of the pressure wheel. When the diameter of the steel pipe is different, the angle that the motor seat needs to rotate is different. The swing angle of the reduction motor can be limited by changing the height position of the adjusting bolt, so as to ensure that the pressure wheel presses steel pipes of different diameters.

[0061] When the steel pipe coming out of the forming unit is a defective pipe with obvious defects, the left cylinder in the turning mechanism drives the turning plate to swing, so that the steel pipe falls into the first defective material rack. When the steel pipe has no obvious defects, the right cylinder drives the turning plate to swing, so that the steel pipe falls into the inclined material rack and stops at the stopper of the first inclined rack.

[0062] The turntable on the airtight test mechanism uses the material hook to pull one steel pipe from the first inclined bar rack onto the turntable at a time. Up to four steel pipes can be pulled in for airtightness testing at the same time. After the airtightness test is completed, the steel pipes fall through the inclined plate in turn. When the steel pipe fails the airtightness test, the first sorting cylinder in the transition rack drives the first sorting plate to rise, and the steel pipe falls into the second unqualified product rack. When the steel pipe passes the airtightness test, the steel pipe rolls directly onto the transition rack along the inclined plate and the first sorting plate, and stops at the stopper of the second inclined bar rack. The height of the stopper can be adjusted according to the diameter of the steel pipe to ensure that the steel pipes are arranged in order on the second inclined bar rack.

[0063] The feed cylinder in the feed roller conveyor drives the input material shifting block to swing, and each time a steel pipe is shifted from the second inclined bar frame to the feed roller conveyor, and then the feed transmission motor drives the first roller to rotate and transport the steel pipe to the flaw detection control room.

[0064] The steel pipes coming out of the flaw detection control room enter the discharging roller, and the discharging transmission motor drives the second rollers to rotate, and the steel pipes are transported to the designated position of the discharging roller. Then the discharging cylinder drives the output material block to swing, and the steel pipes that have completed the flaw detection are pulled out of the discharging roller. When the steel pipe is qualified in the flaw detection, the second sorting cylinder extends, driving the second sorting plate to rotate upward, thereby opening the third unqualified product rack, and the unqualified pipes fall into the third unqualified product rack; when the steel pipe is unqualified in the flaw detection, the second sorting plate covers the third unqualified product rack, and the steel pipe rolls onto the inspection rack through the rear transition rack, so as to carry out subsequent manual inspection and collect the steel pipes.

[0065] Finally, it should be noted that the above examples are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations, for example, the present invention can be used for the detection and transportation of titanium tubes. All variations that can be directly derived or associated with the content disclosed by ordinary technicians in this field should be considered as the protection scope of the present invention.

Claims

1. An automatic conveying system for finishing and testing small-diameter steel pipes, characterized in that: The invention comprises a machine frame (1), an input roller (2) arranged horizontally at the outlet of a steel tube forming unit and conveying steel tubes (12) from left to right, a material turning mechanism (3) arranged horizontally at the outlet of the input roller for preliminarily sorting the steel tubes, a plurality of groups of inclined material racks (4) arranged parallel to each other and obliquely at the front side of the material turning mechanism, an airtightness testing mechanism (5) arranged horizontally at the outlet of each inclined material rack for detecting the airtightness of the steel tube, a plurality of groups of transition material racks (6) arranged parallel to each other and obliquely at the front side of the airtightness testing mechanism, a feed roller (7) arranged horizontally at the outlet of each transition material rack, and a feed roller (8) arranged at the outlet of each transition material rack. A flaw detection control room (8) is provided at the outlet of the material roller conveyor for flaw detection of the steel pipe, a discharging roller conveyor (9) is horizontally arranged at the outlet of the flaw detection control room, a plurality of groups of rear transition material racks (10) are arranged parallel to each other and obliquely at the rear side of the discharging roller conveyor, and a plurality of groups of inspection material racks (11) are arranged parallel to each other and horizontally at the outlet of each rear transition material rack for collecting qualified steel pipes; the input roller conveyor, the material turning mechanism, the airtightness test mechanism, the feed roller conveyor and the discharging roller conveyor are all arranged in the left-right direction; the inclined material rack, the transition material rack, the rear transition material rack and the inspection material rack are all arranged in the front-back direction; The input roller table comprises a plurality of V-shaped wheels (2-1) rotatably positioned on a frame and arranged at equal intervals along the conveying direction of the steel pipe, a support (2-2) fixed on the frame, a motor seat (2-3) hinged to the support, a reduction motor (2-4) fixed to the motor seat, a pressure wheel (2-5) fixedly connected to an output shaft (2-9) of the reduction motor, a swing cylinder (2-6) whose base is hinged to the frame and whose push rod is hinged to the motor seat to drive the reduction motor to swing in a vertical plane, and an adjusting bolt (2-7) vertically mounted on the side of the motor support to limit the swing angle of the reduction motor; the pressure wheel is arranged above each V-shaped wheel and corresponds to the position of the steel pipe so that the pressure wheel can press and convey the steel pipe when swinging integrally with the reduction motor; and a rubber ring (2-8) is mounted on the outer periphery of the pressure wheel.

2. The small-diameter steel pipe finishing and testing automatic conveying system according to claim 1 is characterized by: The material turning mechanism comprises a turning plate (3-1) adapted to the height of the V-shaped wheel and capable of swinging around a horizontal axis arranged in the left-right direction and positioned on a frame to screen qualified steel pipes and unqualified steel pipes, two groups of turning components respectively arranged at both ends of the turning plate to synchronously drive the turning plate to swing, and a first unqualified product rack (3-2) arranged at the rear side of the turning plate to receive unqualified steel pipes; a first protective layer (3-5) is arranged on the surface of the turning plate; The two groups of material turning components have the same structure; each group of material turning components comprises a left cylinder (3-3) whose base is hinged on the frame and whose push rod is hinged to the bottom of the front side of the material turning plate, and a right cylinder (3-4) whose base is hinged on the frame and whose push rod is hinged to the bottom of the rear side of the material turning plate.

3. The automatic conveying system for finishing and testing small-diameter steel pipes according to claim 2 is characterized in that: The inclined material unloading rack comprises a vertically arranged column (4-1) whose bottom can move left and right via a rolling pair, a first inclined bar frame (4-2) obliquely fixed to the top of the column, a second protective layer (4-3) arranged on the surface of the first inclined bar frame, and a stopper (4-4) arranged at the outlet of the first inclined bar frame to position the steel pipe.

4. The small-diameter steel pipe finishing and testing automatic conveying system according to claim 3 is characterized by: The airtightness test mechanism is provided with a plurality of turntables (5-1) at intervals; the turntable can rotate around a horizontal axis arranged in the left-right direction; a plurality of material-selecting hooks (5-2) are evenly arranged on the outer circumference of the turntable, and the positions of the material-selecting hooks are adapted to the positions of the steel pipes at the front end of the first inclined bar rack, so as to sequentially select the steel pipes on the first inclined bar rack into the turntable; an inclined plate (5-4) is obliquely fixed on the frame at the turntable outlet to transport the steel pipes that have completed the airtightness test; a second unqualified product rack (5-3) is provided at the front lower part of the airtightness test mechanism to receive the steel pipes that have failed the airtightness test.

5. The small-diameter steel pipe finishing and testing automatic conveying system according to claim 4 is characterized by: The transition material rack comprises a second inclined bar rack (6-1) fixed obliquely on the frame, a first sorting plate (6-2) arranged above the second unqualified product rack and swingably positioned at the inlet end of the second inclined bar rack to open or cover the second unqualified product rack, a first sorting cylinder (6-3) whose base is fixed on the frame and whose push rod drives the first sorting plate to swing through a first connecting rod, and a material stopper (6-4) arranged at the outlet of the second inclined bar rack and capable of vertically adjusting the height.

6. The automatic conveying system for finishing and testing small-diameter steel pipes according to claim 5 is characterized in that: The feed roller conveyor comprises a plurality of first rollers (7-1) arranged at intervals in the left-right direction and rotatably positioned on a frame, a feed transmission motor (7-2) mounted on the frame and driving the first rollers to rotate, an input material shifting block (7-3) arranged at the rear side of the feed roller conveyor and swingably positioned on the frame so as to shift the steel pipe on the second inclined bar frame into the first roller, and a feed cylinder (7-4) whose base is hinged on the frame and whose push rod is hinged to the input material shifting block so as to drive the input material shifting block to swing.

7. The automatic conveying system for finishing and testing small-diameter steel pipes according to claim 6 is characterized in that: The discharging roller conveyor comprises a plurality of second rollers (9-1) arranged at intervals in the left-right direction and rotatably positioned on a frame, a discharging transmission motor (9-2) mounted on the frame and driving the second rollers to rotate, an output material shifting block (9-3) arranged at the rear side of the discharging roller conveyor and swingably hinged on the frame so as to shift the steel pipe on the second rollers to the next station, and a discharging cylinder (9-4) whose base is hinged on the frame and whose push rod is hinged to the output material shifting block so as to drive the output material shifting block to swing.

8. The automatic conveying system for finishing and testing small-diameter steel pipes according to claim 7 is characterized in that: A third unqualified product rack (10-4) is provided between the rear transition rack and the discharging roller to receive steel pipes that fail the flaw detection.

9. The automatic conveying system for finishing and testing small-diameter steel pipes according to claim 8 is characterized in that: The rear transition material rack comprises a third inclined bar rack (10-1) which is tilted and fixed on the frame, a second sorting plate (10-2) which is arranged above the third unqualified product material rack and one end of which is swingably positioned at the inlet end of the third inclined bar rack so as to open or cover the third unqualified product material rack, and a second sorting cylinder (10-3) whose base is fixed on the frame and whose push rod drives the second sorting plate to swing through a second connecting rod.

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