Flange connecting hole coaxiality detection device and detection method thereof

Abstract

The invention belongs to the technical field of detection, particularly relates to a flange connecting hole coaxiality detection device and a detection method thereof, and provides the following scheme aiming at the problems that existing detection mostly depends on manual operation, and the coaxiality of flange connecting holes cannot be clearly displayed by a single detection result: the flange connecting hole coaxiality detection device comprises a workbench; an L-shaped frame is welded to the top of the workbench, a multi-stage electric push rod is fixedly arranged in the L-shaped frame in a penetrating mode, a hollow disc is fixed to an output shaft of the multi-stage electric push rod, a plurality of clamping plates are arranged at the top of the workbench, and the multiple clamping plates are used for clamping and fixing a flange plate in a matched mode. Flange plates can be clamped in sequence, distance measurement can be conducted on the inner walls of the two flange plates at the same time, the coaxiality of the flange plates can be simply and clearly displayed through data comparison of the two flange plates, operation is easy, and accuracy is high.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, and in particular to a flange connection hole coaxiality detection device and a detection method thereof. Background Art

[0002] In the production and processing of valves, flanges, as key components connecting valves and pipelines, bear the important responsibility of ensuring connection stability and sealing. In order to effectively prevent installation deviation problems caused by mismatched through-hole positions on flanges, it is particularly important to perform coaxiality detection on flanges. Through strict coaxiality detection, potential problems caused by installation deviations can be effectively avoided, ensuring efficient and safe operation of valve and pipeline systems.

[0003] The existing technology still has the following deficiencies in the process of flange connection hole coaxiality detection: 1. In the prior art, flange detection mostly relies on manual operation, which is not only inefficient, but also easy to introduce deviations, and it is difficult to achieve automatic positioning and accurate detection of the coaxiality of the flange connection hole; 2. Existing inspections are mostly carried out one by one, which cannot clearly show the coaxiality of the flange connection holes.

[0004] In view of the above problems, the present invention document proposes a flange connection hole coaxiality detection device and a detection method thereof. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the existing multi-dependence on manual inspection and the inability of a single inspection to clearly show the coaxiality of the flange connection hole, and to propose a flange connection hole coaxiality detection device and a detection method.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A flange connection hole coaxiality detection device comprises a workbench, an L-shaped frame is welded on the top of the workbench, a multi-stage electric push rod is fixed through the L-shaped frame, a hollow disk is fixed on the output shaft of the multi-stage electric push rod, and a plurality of clamping plates are arranged on the top of the workbench, and the plurality of clamping plates are used to clamp and fix the flange; It also includes an upper column rotating at the bottom of the hollow disk, a first laser rangefinder is fixed on both sides of the upper column, a moving groove is provided in the workbench, a lifting plate is slidably connected in the moving groove, a lower column is rotatably connected to the top of the lifting plate, a second laser rangefinder is fixed on both sides of the lower column, and the upper column and the lower column are close to each other and inserted into corresponding flanges for coaxiality detection; The clamping structure is arranged in the workbench and is used to drive multiple clamping plates to approach each other to complete the clamping and positioning of the flange; The facing structure is arranged on the top of the workbench and is used to drive the upper column and the lower column to move towards each other; The rotating structure is arranged between the upper column and the lower column, and is used to drive the lower column and the upper column to rotate synchronously to perform a comprehensive measurement on the inner wall of the corresponding flange.

[0007] In a possible design, the clamping structure includes a rotating shaft that rotates and passes through the workbench, the top of the rotating shaft is rotatably connected to the bottom of one side of the L-shaped frame, a horizontal plate is fixed to one side of the hollow disk, and one end of the horizontal plate is slidably connected to one side of the L-shaped frame, the top of the rotating shaft passes through the horizontal plate, the outer wall of the rotating shaft is provided with a spiral track groove and a vertical groove, the bottom end of the spiral track groove is connected to the top end of the vertical groove, a sliding block is fixed in the horizontal plate, and the sliding block is slidably matched with the spiral track groove and the vertical groove, the sliding block is matched with the spiral track groove and the vertical groove to drive the rotating shaft to rotate, a bevel gear is fixed to the bottom end of the rotating shaft, the bottom of the workbench is rotatably connected with a turntable, and the outer wall of the turntable is fixed with a sleeve A bevel gear ring is provided which meshes with the bevel gear, a plurality of arc grooves are provided in the turntable, and pins are slidably fitted in the plurality of arc grooves, a plurality of sliding grooves are provided in the workbench, and the top ends of the plurality of pins respectively slide and extend into the corresponding sliding grooves, and the plurality of clamps are respectively arranged at the top ends of the corresponding pins, and the pins cooperate with the sliding grooves and the arc grooves to drive the plurality of clamps to move; the output shaft of the multi-stage electric push rod drives the hollow disk and the cross plate to move downward, and the cross plate drives the rotating shaft and the bevel gear to rotate through the cooperation of the sliding block with the spiral track groove and the vertical groove, and the bevel gear cooperates with the bevel gear ring to drive the turntable to rotate, and the arc groove cooperates with the pins and the sliding groove to drive the plurality of clamps to move toward the middle, thereby completing the clamping and fixation of the two flanges.

[0008] In a possible design, the facing structure includes two L-shaped base plates welded to the top of the workbench, a spur gear is rotatably connected between the two L-shaped base plates, a second rack and a first rack are respectively meshed on both sides of the spur gear, the bottom end of the first rack is fixed to the top of the side of the lifting plate away from the lower column, the top of the two L-shaped base plates is fixed with the same fixed platform, the side of the second rack away from the spur gear is slidably connected to the fixed platform, the cooperation of the second rack, the spur gear and the first rack can control the lifting and lowering of the lifting plate and the lower column, and the second rack An abutment plate is fixed on the top, and one end of the abutment plate is slidably connected to one side of the L-shaped frame, one end of the rotating shaft passes through the abutment plate, and the abutment plate is located below the cross plate; the cross plate pushes the abutment plate and the second rack to move downward, and the cooperation of the second rack, the spur gear and the first rack can make the lifting plate and the lower column move upward, so the lower column and the upper column move toward each other and are inserted into two adjacent flanges, and then the upper column, the first laser rangefinder and the lower column, the second laser rangefinder can be used to detect the inner walls of the corresponding two flanges, so as to calculate the coaxiality of the flanges.

[0009] In a possible design, the rotating structure includes a hexagonal groove arranged at the bottom of the upper column, a hexagonal clamping column is slidably connected in the hexagonal groove, the top of the hexagonal clamping column and the top inner wall of the hexagonal groove are fixed with the same spring, the top of the lower column is provided with a hexagonal clamping groove clamped with the hexagonal clamping column, the cooperation of the hexagonal clamping column and the hexagonal clamping groove can make the upper column and the lower column rotate synchronously, a driving motor is fixed to the bottom of the lifting plate, and the output shaft of the driving motor is fixedly connected to the bottom end of the lower column; the lower column and the upper column move toward each other until the hexagonal clamping column is inserted into the hexagonal clamping groove, and then the driving motor The lower column is driven to rotate, and the lower column drives the upper column to rotate through the cooperation of the hexagonal slot and the hexagonal column, so that the first laser rangefinder and the second laser rangefinder on the upper column and the lower column can measure the inner walls of the corresponding flanges at the same angle. When the upper column and the lower column rotate for several circles, the distances between the inner walls of the two flanges and the upper column and the lower column can be measured respectively. In addition, the upper column and the lower column can detect the distances between the inner walls of the flanges at different heights again, so as to calculate the axial positions of the two flanges, and the comparison of the two sets of data can clearly show the coaxiality of the two flanges.

[0010] In a possible design, a connecting plate is fixed to the side of the first rack away from the lower column, a tension spring is fixed to the bottom of the connecting plate, and the bottom end of the tension spring is fixedly connected to the bottom inner wall of the movable groove to reset the lifting plate and the abutment plate.

[0011] In a possible design, a rubber sheet is provided on one side of the plurality of clamping plates that are close to each other, so as to increase the friction between the clamping plates and the flange and increase the stability of the clamping.

[0012] In a possible design, the number of the plurality of pins and splints is three, a pin column is fixed at the bottom of one of the splints, a pin hole is provided at the top of one of the pins, and the pin column and the pin hole are slidably engaged with each other, so as to facilitate the disassembly of the corresponding splint, and then facilitate the placement of the flange between the three splints at a later time, and the other two splints are respectively fixed at the top of the corresponding pins.

[0013] In one possible design, an air injection hose is fixed to the top of the hollow disk, one end of which is connected to an external compressed air pump, and a plurality of inclined holes are provided at the bottom of the hollow disk for clearing dust from the inner wall of the flange; when the hollow disk drives the upper column to be inserted into the flange, the external compressed air pump injects compressed gas into the hollow disk through the air injection hose, and blows it toward the inner wall of the flange through the inclined holes, thereby clearing the dust attached to the inner wall of the flange to ensure the accuracy of subsequent detection.

[0014] In a possible design, the top of the workbench is rotatably connected to two carrying plates, the tops of the two carrying plates are used to place flange plates, and rubber pads are fixed to the tops of the two carrying plates to increase the friction between the carrying plates and the flange flat plates. A cleaning cotton block is fixed to the top of the workbench, and the cleaning cotton block is located between the two carrying plates and is used to clean the outer walls of two adjacent flange plates. A transmission shaft is fixed to the bottom of the two carrying plates, and the bottom ends of the two transmission shafts are rotatably extended to the bottom of the workbench. The two transmission shafts are connected by pulleys and belt transmissions, and a The first synchronous wheel, the bottom of the bevel gear is fixed with a second synchronous wheel through a fixed shaft, the second synchronous wheel and the first synchronous wheel are connected through a synchronous belt transmission, and the diameter of the second synchronous wheel is greater than the diameter of the first synchronous wheel, which is used to increase the number of rotations of the carrier plate; the bevel gear drives one of the transmission shafts to rotate through the cooperation of the second synchronous wheel, the first synchronous wheel and the synchronous belt, and the two transmission shafts are connected through pulleys and belt transmissions, thereby driving the two carrier plates to rotate, at this time, the cleaning cotton block can clean the dirt attached to the outer wall of the rotating flange, to avoid the splint causing damage to the outer wall of the flange under the action of dirt during later inspection.

[0015] In the present application, a method for detecting the coaxiality of a flange connection hole comprises the following steps: S1. Stack two flanges of the same specifications on the workbench, and use a multi-stage electric push rod to drive the hollow plate and the cross plate to move downward; the cross plate drives the rotating shaft, the bevel gear, and the turntable to rotate through the cooperation of the sliding block with the spiral track groove and the vertical groove, and then drives the clamping plate to move toward the center to achieve the clamping and fixing of the flange; S2, continue to move the hollow plate and the cross plate downward, push the abutment plate and the second rack downward, and through the cooperation of the second rack, the spur gear and the first rack, move the lifting plate and the lower column upward, and insert them into the flange facing the upper column until the hexagonal clamping column and the hexagonal clamping groove are locked; drive the motor to drive the lower column to rotate, and through the cooperation of the hexagonal clamping column and the hexagonal clamping groove, drive the upper column to rotate synchronously, so that the first laser rangefinder and the second laser rangefinder measure the distance of the inner wall of the flange at the same angle; rotate multiple times and measure at different heights, calculate the axial position of the flange, and evaluate the coaxiality; S3. When the hollow disk is close to the flange, inject compressed gas through the gas injection hose and blow it toward the inner wall of the flange through the inclined hole to remove dust and ensure detection accuracy; S4. Place the flange on the top of the carrier plate. The carrier plate uses a rubber pad to increase friction and maintain stability. When the bevel gear rotates, the second synchronous wheel, the first synchronous wheel, the synchronous belt, the belt, and the pulley drive the two carrier plates to rotate synchronously. Use a cleaning cotton block to clean the dirt on the outer wall of the flange to prevent the splint from damaging the flange.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the outer wall of the rotating shaft is provided with a spiral track groove and a vertical groove, a sliding block is fixed in the horizontal plate, a bevel gear is fixed at the bottom end of the rotating shaft, the outer wall fixed sleeve of the rotating disk is provided with a bevel gear ring meshing with the bevel gear, a plurality of arc grooves are provided in the rotating disk, a plurality of the arc grooves are slidably matched with pin shafts, and the top ends of the plurality of pin shafts slide and extend into the corresponding sliding grooves respectively; when the horizontal plate moves downward, the rotating shaft and the bevel gear are driven to rotate through the cooperation of the sliding block with the spiral track groove and the vertical groove, thereby driving the rotating disk to rotate, and the cooperation of the arc groove with the pin shaft and the sliding groove drives the plurality of clamping plates to move toward the middle, thereby completing the clamping and fixing of the two flanges; In the present invention, a spur gear is rotatably connected between the two L-shaped base plates, and the second rack and the first rack are respectively meshed on both sides of the spur gear. The bottom end of the first rack is fixed to the top of the lifting plate, and the second rack is slidably connected to the fixed platform. The cooperation of the second rack, the spur gear and the first rack can control the lifting and lowering of the lifting plate and the lower column; the cross plate pushes the abutment plate and the second rack to move downward, and the cooperation of the second rack, the spur gear and the first rack can make the lifting plate and the lower column move upward, so that the lower column and the upper column move toward each other and are inserted into two adjacent flanges, thereby detecting the inner walls of the two flanges. By comparing the two sets of data, the coaxiality of the flanges can be simply and clearly demonstrated; In the present invention, a hexagonal clamping column is slidably connected in the hexagonal groove, and the top end of the hexagonal clamping column and the top inner wall of the hexagonal groove are fixed with the same spring, and the top end of the lower column is provided with a hexagonal clamping groove clamped with the hexagonal clamping column; the lower column and the upper column move toward each other until the hexagonal clamping column is inserted into the hexagonal clamping groove, and then the driving motor drives the lower column to rotate, and the lower column drives the upper column to rotate through the cooperation of the hexagonal clamping groove and the hexagonal clamping column, so that the first laser rangefinder and the second laser rangefinder on the upper column and the lower column can measure the inner wall of the corresponding flange at the same angle, and when the upper column and the lower column rotate several times, the distance between the inner wall of the two flanges and the upper column and the lower column can be measured respectively. In addition, the upper column and the lower column can detect the inner wall distance of the flange again at different heights, automatically complete the coaxiality detection of the flange hole, and perform multiple detections to obtain accurate detection data; In the present invention, the hollow plate is pushed downward by a multi-stage electric push rod, so that the flange can be clamped in turn and the inner walls of the two flanges can be measured at the same time. The coaxiality of the flanges can be simply and clearly displayed by comparing the data of the two flanges. The operation is simple and the accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a flange connection hole coaxiality detection device provided in Example 1 of the present invention; Figure 2 A schematic diagram of the front and cross-sectional structure of a flange connection hole coaxiality detection device provided in Example 1 of the present invention; Figure 3 A schematic diagram of a three-dimensional cross-sectional structure of a hollow disk and an upper column of a flange connection hole coaxiality detection device provided in Example 1 of the present invention; Figure 4 A schematic diagram of a three-dimensional exploded structure of a rotating shaft, a spiral track groove, a horizontal plate and a sliding block of a flange connection hole coaxiality detection device provided in Example 1 of the present invention; Figure 5 A schematic diagram of a three-dimensional exploded structure of a turntable, a pin shaft and a clamping plate of a flange connection hole coaxiality detection device provided in Example 1 of the present invention; Figure 6 A schematic diagram of a three-dimensional exploded structure of a workbench and a pin shaft of a flange connection hole coaxiality detection device provided in Example 1 of the present invention; Figure 7 A schematic diagram of a three-dimensional exploded structure of a lifting plate, an abutment plate and a spur gear of a flange connection hole coaxiality detection device provided in Example 1 of the present invention; Figure 8 A schematic diagram of the front cross-sectional structure of a flange connection hole coaxiality detection device provided in Example 2 of the present invention; Fig. 9 A schematic diagram of the top view of the structure of a workbench, a carrying plate and a cleaning cotton block of a flange connection hole coaxiality detection device provided in Example 2 of the present invention; Fig.10 for Figure 4 Enlarged view of part A.

[0018] In the figure: 1, workbench; 2, L-shaped frame; 3, multi-stage electric push rod; 4, hollow plate; 5, horizontal plate; 6, rotating shaft; 7, spiral track groove; 8, vertical groove; 9, sliding block; 10, bevel gear; 11, turntable; 12, bevel gear ring; 13, arc groove; 14, pin shaft; 15, sliding groove; 16, clamping plate; 17, pin column; 18, pin hole; 19, oblique hole; 20, air injection hose; 21, upper column; 22, hexagonal groove; 23, spring; 24, hexagonal clamp Column; 25, first laser rangefinder; 26, moving slot; 27, lifting plate; 28, lower column; 29, second laser rangefinder; 30, hexagonal slot; 31, driving motor; 32, L-shaped base plate; 33, spur gear; 34, first rack; 35, connecting plate; 36, tension spring; 37, fixed platform; 38, second rack; 39, abutment plate; 40, carrying plate; 41, transmission shaft; 42, first synchronous wheel; 43, second synchronous wheel; 44, cleaning cotton block. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Example 1: Reference Figure 1 and Figure 2 , a detection device, relates to the field of flange hole detection technology, the device mainly comprises a workbench 1, and an L-shaped frame 2 is fixed on the top of the workbench 1 by welding. Inside the L-shaped frame 2, a multi-stage electric push rod 3 is fixedly installed. On the output shaft of the multi-stage electric push rod 3, a hollow disk 4 is fixedly connected. On the top of the workbench 1, a plurality of clamping plates 16 are arranged, and when these clamping plates 16 are used in combination, the flange can be effectively clamped and fixed.

[0021] Reference Figure 2 , Figure 3 and Figure 7 At the bottom of the hollow disk 4, an upper column 21 is rotatably mounted. A first laser rangefinder 25 is fixed on both sides of the upper column 21. A moving groove 26 is provided inside the workbench 1, and a lifting plate 27 is slidably connected in the moving groove 26. A lower column 28 is rotatably connected to the top of the lifting plate 27, and a second laser rangefinder 29 is also fixed on both sides of the lower column 28. When in use, the upper column 21 and the lower column 28 will be close to each other and inserted into the corresponding flange for coaxiality detection.

[0022] Reference Figure 2 , Figure 4 , Figure 5 , Fig.10 and Figure 6In order to realize the clamping function, a clamping structure is provided in the workbench 1. This structure includes a rotating shaft 6 that rotates through the workbench 1, and the top of the rotating shaft 6 is rotatably connected to the bottom of one side of the L-shaped frame 2. A horizontal plate 5 is fixed on one side of the hollow disk 4, and one end of the horizontal plate 5 is slidably connected to one side of the L-shaped frame 2. The top of the rotating shaft 6 passes through the horizontal plate 5, and a spiral track groove 7 and a vertical groove 8 are provided on the outer wall of the rotating shaft 6, and the bottom end of the spiral track groove 7 is connected to the top end of the vertical groove 8. A sliding block 9 is fixed in the horizontal plate 5, and this sliding block 9 is slidably matched with the spiral track groove 7 and the vertical groove 8. When the output shaft of the multi-stage electric push rod 3 drives the hollow disk 4 and the horizontal plate 5 to move downward, the horizontal plate 5 will drive the rotating shaft 6 to rotate through the cooperation of the sliding block 9 with the spiral track groove 7 and the vertical groove 8. A bevel gear 10 is fixed to the bottom end of the rotating shaft 6, and a turntable 11 is rotatably connected to the bottom of the workbench 1. A bevel gear ring 12 meshing with the bevel gear 10 is fixedly sleeved on the outer wall of the turntable 11. A plurality of arc grooves 13 are provided in the turntable 11, and a pin shaft 14 is slidably fitted in each of these arc grooves 13. A plurality of sliding grooves 15 are provided in the workbench 1, and the top ends of the pin shafts 14 slide and extend into the corresponding sliding grooves 15 respectively. A plurality of clamping plates 16 are provided at the top ends of the sliding grooves 15. In this way, the cooperation of the pin shaft 14 with the sliding grooves 15 and the arc grooves 13 can drive the plurality of clamping plates 16 to move, thereby completing the clamping and positioning of the flange.

[0023] Reference Figure 5 , three pins 14 and three clamps 16 are provided in the device. A pin 17 is fixed to the bottom of one of the clamps 16, and a pin hole 18 is provided on the top of the corresponding pin 14. The pin 17 and the pin hole 18 are connected by sliding and plugging, and such a design allows the clamp 16 to be easily disassembled. When the flange needs to be inspected, the clamp 16 with the pin 17 can be removed first, and then the flange can be placed in the space surrounded by the other two fixed clamps 16 and the clamp 16 just removed, and then the clamp 16 can be reinstalled through the cooperation of the pin 17 and the pin hole 18 to fix the flange. The other two clamps 16 are directly fixed on the top of the corresponding pins 14.

[0024] Reference Figure 2 and Figure 7, in order to realize the relative movement of the upper column 21 and the lower column 28, a relative structure is arranged on the top of the workbench 1. This structure includes two L-shaped substrates 32 welded to the top of the workbench 1, and a spur gear 33 is rotatably connected between the two L-shaped substrates 32. A second rack 38 and a first rack 34 are respectively engaged on both sides of the spur gear 33. The bottom end of the first rack 34 is fixed to the top of the side of the lifting plate 27 away from the lower column 28. A fixed platform 37 is fixed to the top of the two L-shaped substrates 32, and the side of the second rack 38 away from the spur gear 33 is slidably connected to the fixed platform 37. In this way, the cooperation of the second rack 38, the spur gear 33 and the first rack 34 can control the lifting of the lifting plate 27 and the lower column 28. A contact plate 39 is fixed to the top end of the second rack 38. One end of the contact plate 39 is slidably connected to one side of the L-shaped frame 2. One end of the rotating shaft 6 penetrates through the contact plate 39, and the contact plate 39 is located below the cross plate 5. When the cross plate 5 moves downward, it will push the contact plate 39 and the second rack 38 downward, and then through the cooperation of the second rack 38, the spur gear 33 and the first rack 34, the lifting plate 27 and the lower column 28 will move upward. Therefore, the lower column 28 and the upper column 21 will move relatively and insert into two adjacent flanges.

[0025] Refer to Figure 3 and Figure 7 , in addition, in order to realize the synchronous rotation of the upper column 21 and the lower column 28, a rotating structure is arranged between them. This structure can drive the lower column 28 and the upper column 21 to rotate synchronously, so as to comprehensively measure the inner wall of the corresponding flange. The specific setting of the rotating structure is as follows: a hexagonal groove 22 is opened at the bottom of the upper column 21. A hexagonal clamping column 24 is slidably connected in this hexagonal groove 22. In order to keep the hexagonal clamping column 24 stable at a certain position in the hexagonal groove 22 when not affected by external forces, a spring 23 is fixedly connected between the top end of the hexagonal clamping column 24 and the top inner wall of the hexagonal groove 22. In this way, when the hexagonal clamping column 24 is forced to move downward, the spring 23 will be compressed, and when the external force disappears, the spring 23 will push the hexagonal clamping column 24 to reset. A hexagonal clamping groove 30 matching the hexagonal clamping column 24 is opened at the top end of the lower column 28. When it is necessary to rotate the upper column 21 and the lower column 28 synchronously, first make the lower column 28 and the upper column 21 move relatively until the hexagonal clamping column 24 can be inserted into the hexagonal clamping groove 30. At this time, the cooperation of the hexagonal clamping column 24 and the hexagonal clamping groove 30 realizes the synchronous rotation of the upper column 21 and the lower column 28.

[0026] Refer to Figure 7A driving motor 31 is fixedly connected to the bottom of the lifting plate 27. The output shaft of the driving motor 31 is fixedly connected to the bottom end of the lower column 28. Therefore, when the driving motor 31 is started, it drives the lower column 28 to rotate. Due to the cooperation between the hexagonal clamping column 24 and the hexagonal clamping groove 30, the rotation of the lower column 28 drives the upper column 21 to rotate synchronously.

[0027] Specifically, two first laser rangefinders 25 and second laser rangefinders 29 are installed on the upper column 21 and the lower column 28, respectively. When the upper column 21 and the lower column 28 rotate, the two laser rangefinders can measure the inner wall of the corresponding flange at the same angle. By rotating several circles, the distance between the inner wall of the two flanges and the upper column 21 and the lower column 28 can be measured. In addition, by adjusting the height of the lifting plate 27, the upper column 21 and the lower column 28 can detect the inner wall distance of the flange at different heights. In this way, the axis position of the two flanges can be calculated based on the measured data, and the coaxiality of the two flanges can be clearly displayed by comparing the two sets of data.

[0028] Reference Figure 2 and Figure 7 In order to further increase the stability and reset function of the device, a connecting plate 35 is fixedly connected to the side of the first rack 34 away from the lower column 28. A tension spring 36 is fixedly connected to the bottom of the connecting plate 35. The bottom end of the tension spring 36 is fixedly connected to the bottom inner wall of the moving groove 26. In this way, when the lifting plate 27 or the abutting plate 39 is moved by an external force, the tension spring 36 will be stretched or compressed. When the external force disappears, the tension spring 36 will push the lifting plate 27 and the abutting plate 39 to reset and move.

[0029] In addition, in order to improve the clamping stability of the clamping plate 16 on the flange, rubber sheets are arranged on the side where the multiple clamping plates 16 are close to each other. These rubber sheets can increase the friction between the clamping plate 16 and the flange, thereby preventing the flange from sliding or rotating during the detection process.

[0030] In order to remove dust from the inner wall of the flange, an air injection hose 20 is fixed on the top of the hollow disk 4, and one end of the air injection hose 20 is connected to an external compressed air pump. A plurality of inclined holes 19 are provided at the bottom of the hollow disk 4. When the hollow disk 4 drives the upper column 21 to be inserted into the flange, the external compressed air pump can be started, and the compressed air pump injects compressed gas into the hollow disk 4 through the air injection hose 20. The gas is then blown toward the inner wall of the flange through the inclined holes 19, thereby removing the dust attached to the inner wall of the flange. Such a design can ensure the accuracy of the later detection and avoid the influence of dust on the detection results.

[0031] The flange connection hole coaxiality detection device of this embodiment can not only conveniently fix and disassemble the flange, but also clean the inner and outer walls of the flange, thereby ensuring the accuracy and safety of the detection. In addition, the device can also accurately measure and display the coaxiality of the two flanges, providing strong support for the quality control of the flange connection.

[0032] Example 2: Reference Figure 8 and Fig. 9 , based on the improvement of Example 1: two carrier plates 40 are rotatably connected to the top of the workbench 1, and the tops of the two carrier plates 40 are used to place the flanges to be tested. Rubber pads are fixed on the tops of the carrier plates 40 to increase the friction between the carrier plates 40 and the flanges to prevent the flanges from slipping during the rotation. A cleaning cotton block 44 is also fixed on the top of the workbench 1, and the cleaning cotton block 44 is located between the two carrier plates 40. When the flanges on the two carrier plates 40 rotate, the cleaning cotton block 44 can clean the dirt attached to the outer wall of the rotating flange.

[0033] refer to Figure 8 and Fig. 9 In order to realize the rotation of the carrier plate 40 and its coordination with the cleaning cotton block 44, a transmission shaft 41 is fixed at the bottom of the two carrier plates 40, and the bottom ends of the transmission shafts 41 are rotated and extended to the bottom of the workbench 1. The two transmission shafts 41 are connected by pulleys and belt transmission to achieve synchronous rotation. A first synchronous wheel 42 is fixed to the bottom end of one of the transmission shafts 41, and a second synchronous wheel 43 is fixed to the bottom of the bevel gear 10 through a fixed shaft. The second synchronous wheel 43 is connected to the first synchronous wheel 42 through a synchronous belt transmission. In particular, the diameter of the second synchronous wheel 43 is larger than the diameter of the first synchronous wheel 42. Such a design can increase the number of rotations of the carrier plate 40, thereby ensuring that the cleaning cotton block 44 has enough time to clean the outer wall of the flange.

[0034] In actual use, the bevel gear 10 will drive one of the transmission shafts 41 to rotate through the cooperation of the second synchronous wheel 43, the first synchronous wheel 42 and the synchronous belt, and then the transmission shaft 41 will drive the other transmission shaft 41 to rotate synchronously through the pulley and belt transmission connection, thereby driving the two carrier plates 40 to rotate. At this time, the cleaning cotton block 44 can clean the outer wall of the rotating flange to prevent the clamping plate 16 from causing damage to the outer wall of the flange under the action of dirt during later inspection.

[0035] A method for detecting the coaxiality of a flange connection hole, comprising the following steps: S1. When in use, two flanges of the same specification are stacked on the workbench 1. The output shaft of the multi-stage electric push rod 3 drives the hollow disk 4 and the horizontal plate 5 to move downward. The horizontal plate 5 drives the rotating shaft 6 and the bevel gear 10 to rotate through the cooperation of the sliding block 9, the spiral track groove 7, and the vertical groove 8. The bevel gear 10 and the bevel gear ring 12 drive the turntable 11 to rotate. The arc groove 13, the pin shaft 14, and the sliding groove 15 cooperate to drive multiple clamping plates 16 to move toward the middle to complete the clamping and fixing of the two flanges. When clamping and fixing, the sliding block 9 just moves into the vertical groove 8, so that the flange can be continuously clamped when the hollow disk 4 moves downward; S2, the hollow plate 4 and the cross plate 5 continue to move downward, the cross plate 5 pushes the abutment plate 39 and the second rack 38 to move downward, the cooperation of the second rack 38, the spur gear 33 and the first rack 34 can make the lifting plate 27 and the lower column 28 move upward, so the lower column 28 and the upper column 21 move toward each other and insert into the two adjacent flanges until the hexagonal clamping column 24 is inserted into the hexagonal clamping groove 30, and then the driving motor 31 drives the lower column 28 to rotate, and the lower column 28 drives the upper column 21 to rotate through the cooperation of the hexagonal clamping groove 30 and the hexagonal clamping column 24, so that the upper column 21 The first laser rangefinder 25 and the second laser rangefinder 29 on the column 21 and the lower column 28 can measure the inner wall of the corresponding flange at the same angle. When the upper column 21 and the lower column 28 rotate several times, the distances of the inner walls of the two flanges from the upper column 21 and the lower column 28 can be measured. In addition, the upper column 21 and the lower column 28 can detect the distance of the inner wall of the flange again at different heights, and then the axis position of the two flanges can be calculated. The comparison of the two sets of data can clearly show the coaxiality of the two flanges. S3. When the hollow disk 4 drives the upper column 21 to be inserted into the flange, the external compressed air pump injects the compressed gas into the hollow disk 4 through the air injection hose 20, and blows it to the inner wall of the flange through the inclined hole 19, thereby removing the dust attached to the inner wall of the flange to ensure the accuracy of the subsequent detection; S4. Place the two flanges on the top of the two supporting plates 40 respectively, and the two sides of the cleaning cotton block 44 abut the two flanges respectively, and the rubber pad arranged on the top of the supporting plate 40 can increase the friction between the flange and the supporting plate 40, so that the flange is stably placed on the supporting plate 40. When the bevel gear 10 drives the turntable 11 to rotate to clamp the two flanges, the bevel gear 10 drives one of the transmission shafts 41 to rotate through the cooperation of the second synchronous wheel 43, the first synchronous wheel 42 and the synchronous belt, and the two transmission shafts 41 are connected through pulleys and belt transmission, thereby driving the two supporting plates 40 to rotate. At this time, the cleaning cotton block 44 can clean the dirt attached to the outer wall of the rotating flange to avoid damage to the outer wall of the flange by the clamping plate 16 under the action of dirt during later inspection.

[0036] However, as is well known to those skilled in the art, the working principles and wiring methods of the drive motor 31, the second laser rangefinder 29, the first laser rangefinder 25 and the multi-stage electric push rod 3 are commonplace, and are all conventional means or common knowledge, and will not be elaborated here. Those skilled in the art can make any optional selections according to their needs or convenience.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A flange connection hole coaxiality detection device, characterized in that: The workbench (1) comprises an L-shaped frame (2) welded to the top of the workbench (1), a multi-stage electric push rod (3) is fixedly passed through the L-shaped frame (2), an output shaft of the multi-stage electric push rod (3) is fixed with a hollow disk (4), and a plurality of clamping plates (16) are arranged on the top of the workbench (1), and the plurality of clamping plates (16) are used to clamp and fix the flange; It also includes an upper column (21) rotatable at the bottom of the hollow disk (4), a first laser rangefinder (25) being fixed on both sides of the upper column (21), a movable groove (26) being provided in the workbench (1), a lifting plate (27) being slidably connected in the movable groove (26), a lower column (28) being rotatably connected at the top of the lifting plate (27), a second laser rangefinder (29) being fixed on both sides of the lower column (28), and the upper column (21) and the lower column (28) being close to each other and inserted into corresponding flanges for coaxiality detection; A clamping structure, arranged in the workbench (1), for driving a plurality of clamping plates (16) to move closer to each other to complete the clamping and positioning of the flange; An opposing structure, arranged on the top of the workbench (1), and used to drive the upper column (21) and the lower column (28) to move toward each other; The rotating structure is arranged between the upper column (21) and the lower column (28) and is used to drive the lower column (28) and the upper column (21) to rotate synchronously to perform a comprehensive measurement on the inner wall of the corresponding flange.

2. A flange connection hole coaxiality detection device according to claim 1, characterized in that: The clamping structure comprises a rotating shaft (6) which rotatably passes through the workbench (1), the top of the rotating shaft (6) being rotatably connected to the bottom of one side of the L-shaped frame (2), a horizontal plate (5) being fixed to one side of the hollow disk (4), and one end of the horizontal plate (5) being slidably connected to one side of the L-shaped frame (2), the top end of the rotating shaft (6) passing through the horizontal plate (5), the outer wall of the rotating shaft (6) being provided with a spiral track groove (7) and a vertical groove (8), the bottom end of the spiral track groove (7) being connected to the top end of the vertical groove (8), a sliding block (9) being fixed inside the horizontal plate (5), and the sliding block (9) being slidably matched with the spiral track groove (7) and the vertical groove (8), and the sliding block (9) being matched with the spiral track groove (7) and the vertical groove (8) for driving the rotating shaft (6) The rotating shaft (6) is rotated, a bevel gear (10) is fixed at the bottom end of the rotating shaft (6), a rotating disk (11) is rotatably connected to the bottom of the workbench (1), an outer wall fixed sleeve of the rotating disk (11) is provided with a bevel gear ring (12) meshing with the bevel gear (10), a plurality of arc grooves (13) are provided in the rotating disk (11), a plurality of pins (14) are slidably matched in the plurality of arc grooves (13), a plurality of sliding grooves (15) are provided in the workbench (1), the top ends of the plurality of pins (14) respectively slide and extend into the corresponding sliding grooves (15), a plurality of clamps (16) are respectively arranged at the top ends of the corresponding pins (14), and the pins (14) cooperate with the sliding grooves (15) and the arc grooves (13) to drive the plurality of clamps (16) to move.

3. A flange connection hole coaxiality detection device according to claim 2, characterized in that: The facing structure comprises two L-shaped base plates (32) welded to the top of the workbench (1); a spur gear (33) is rotatably connected between the two L-shaped base plates (32); a second rack (38) and a first rack (34) are respectively meshed on both sides of the spur gear (33); the bottom end of the first rack (34) is fixed to the top of a side of the lifting plate (27) away from the lower column (28); the tops of the two L-shaped base plates (32) are fixed to the same fixed platform (37); the second rack ( The side of the second rack (38) away from the spur gear (33) is slidably connected to the fixed platform (37); the cooperation between the second rack (38), the spur gear (33) and the first rack (34) can control the lifting and lowering of the lifting plate (27) and the lower column (28); an abutment plate (39) is fixed to the top of the second rack (38), and one end of the abutment plate (39) is slidably connected to one side of the L-shaped frame (2); one end of the rotating shaft (6) passes through the abutment plate (39), and the abutment plate (39) is located below the horizontal plate (5).

4. A flange connection hole coaxiality detection device according to claim 3, characterized in that: The rotating structure comprises a hexagonal groove (22) arranged at the bottom of the upper column (21), a hexagonal clamping column (24) being slidably connected in the hexagonal groove (22), a spring (23) being fixed at the top of the hexagonal clamping column (24) and the top inner wall of the hexagonal groove (22), a hexagonal clamping groove (30) being clamped with the hexagonal clamping column (24) being provided at the top of the lower column (28), the cooperation between the hexagonal clamping column (24) and the hexagonal clamping groove (30) enables the upper column (21) and the lower column (28) to rotate synchronously, and a driving motor (31) is fixed at the bottom of the lifting plate (27), and an output shaft of the driving motor (31) is fixedly connected to the bottom end of the lower column (28).

5. A flange connection hole coaxiality detection device according to claim 4, characterized in that: A connecting plate (35) is fixed to a side of the first rack (34) away from the lower column (28), a tension spring (36) is fixed to the bottom of the connecting plate (35), and the bottom end of the tension spring (36) is fixedly connected to the bottom inner wall of the movable groove (26) for enabling the lifting plate (27) and the abutting plate (39) to perform reset movement.

6. A flange connection hole coaxiality detection device according to claim 5, characterized in that: A rubber sheet is provided on one side of the plurality of clamping plates (16) close to each other, so as to increase the friction between the clamping plates (16) and the flange, thereby increasing the stability of clamping.

7. A flange connection hole coaxiality detection device according to claim 6, characterized in that: The number of the plurality of pins (14) and clamps (16) is three, a pin column (17) is fixed at the bottom of one of the clamps (16), a pin hole (18) is provided at the top of one of the pins (14), and the pin column (17) and the pin hole (18) are slidably plugged into each other, so as to facilitate the disassembly of the corresponding clamp (16), thereby facilitating the later placement of the flange between the three clamps (16), and the other two clamps (16) are respectively fixed on the top of the corresponding pins (14).

8. A flange connection hole coaxiality detection device according to claim 7, characterized in that: An air injection hose (20) is fixed to the top of the hollow disk (4), one end of the air injection hose (20) is connected to an external compressed air pump, and a plurality of inclined holes (19) are provided at the bottom of the hollow disk (4) for removing dust from the inner wall of the flange.

9. A flange connection hole coaxiality detection device according to claim 8, characterized in that: The top of the workbench (1) is rotatably connected to two supporting plates (40), the tops of the two supporting plates (40) are used to place flanges, the tops of the two supporting plates (40) are fixed with rubber pads for increasing the friction between the supporting plates (40) and the flange flat plate, the top of the workbench (1) is fixed with a cleaning cotton block (44), and the cleaning cotton block (44) is located between the two supporting plates (40) and is used to clean the outer walls of two adjacent flanges, the bottoms of the two supporting plates (40) are fixed with a transmission shaft (41), and the two transmission shafts (41) are fixed to the bottoms of the two supporting plates (40). The bottom ends of the shafts (41) are rotated to extend below the workbench (1), and the two transmission shafts (41) are connected via a pulley and a belt transmission. A first synchronous wheel (42) is fixed to the bottom end of one of the transmission shafts (41), and a second synchronous wheel (43) is fixed to the bottom of the bevel gear (10) via a fixed shaft. The second synchronous wheel (43) is connected to the first synchronous wheel (42) via a synchronous belt transmission, and the diameter of the second synchronous wheel (43) is larger than the diameter of the first synchronous wheel (42), so as to increase the number of rotations of the carrier plate (40).

10. A method for using the flange connection hole coaxiality detection device according to claim 9, characterized in that: The following steps are involved: S1. Stack two flanges of the same specification on a workbench (1), and drive the hollow plate (4) and the horizontal plate (5) to move downward by means of a multi-stage electric push rod (3); the horizontal plate (5) drives the rotating shaft (6), the bevel gear (10), and the turntable (11) to rotate by means of the cooperation between the sliding block (9) and the spiral track groove (7) and the vertical groove (8), thereby driving the clamping plate (16) to move toward the center, thereby clamping and fixing the flange; S2, continue to move the hollow plate (4) and the cross plate (5) downward, push the abutment plate (39) and the second rack (38) downward, and through the cooperation of the second rack (38), the spur gear (33) and the first rack (34), move the lifting plate (27) and the lower column (28) upward, and insert them into the flange plate opposite to the upper column (21) until the hexagonal clamping column (24) and the hexagonal clamping groove (30) are locked; drive the lower column (28) with the driving motor (31) to rotate, and through the cooperation of the hexagonal clamping column (24) and the hexagonal clamping groove (30), drive the upper column (21) to rotate synchronously, so that the first laser rangefinder (25) and the second laser rangefinder (29) measure the distance of the inner wall of the flange plate at the same angle; rotate multiple times and measure at different heights to calculate the axial position of the flange plate and evaluate the coaxiality; S3. When the hollow disk (4) is close to the flange, compressed gas is injected through the gas injection hose (20) and blown toward the inner wall of the flange through the inclined hole (19) to remove dust and ensure detection accuracy; S4. Place the flange on top of the carrier plate (40). The carrier plate (40) is stabilized by increasing friction with a rubber pad. When the bevel gear (10) rotates, the two carrier plates (40) are driven to rotate synchronously. The cleaning cotton block (44) cleans dirt on the outer wall of the flange to prevent the clamping plate (16) from causing damage to the flange.

Images