A flange diameter qualification detection device and method

Abstract

The present invention relates to the field of flange detection technology, specifically to a flange diameter acceptance detection device and method, comprising a detection platform, wherein the upper surface of the detection platform is provided with a placement mechanism for placing the flange, a support mechanism for positioning the flange, a drive mechanism for driving the flange to rotate, and an outer diameter detection mechanism for detecting the acceptance of the flange outer diameter, and the upper surface of the support mechanism is provided with an inner diameter detection mechanism for detecting the acceptance of the flange inner diameter. In the process of detecting the acceptance of the flange diameter, the present invention converts the squeezing force of the inner wall on the rubber airbag when the flange rotates into the inclination value of the telescopic rod, and converts the friction transmission of the outer wall on the rotating plate when the flange rotates into the displacement value of the sliding sleeve, and obtains the change of the inclination value and the displacement value through the change of the force of the concave or convex parts of the inner and outer walls of the flange on the rubber airbag and the rotating plate, thereby detecting the acceptance of the flange diameter.

Description

Technical Field

[0001] The invention relates to the technical field of flange detection, and in particular to a device and method for detecting the degree of flange diameter acceptance. Background Art

[0002] Pipe flange is an important component used to connect pipelines. It is usually a circular disc-shaped structure with bolt holes on it. Two or more pipe flanges are connected together by bolts to achieve a sealed connection between pipelines. It is usually a circular disc-shaped structure with bolt holes on it. Two or more pipe flanges are connected together by bolts to achieve a sealed connection between pipelines.

[0003] In flange processing, it is very important to detect the diameter qualification. The appropriate diameter can ensure that the flanges fit tightly, ensure accurate connection, form a good seal, and prevent fluid leakage. If the diameter is unqualified, it may lead to loose connection and leakage problems. This may cause serious safety hazards and environmental pollution in some working conditions with strict sealing requirements (such as transporting hazardous chemicals, high-pressure gases, etc.). Unqualified diameter may also lead to failure to assemble correctly with other related components, affecting the normal operation and installation efficiency of the entire pipeline system. Detecting the flange diameter qualification is of key significance to ensure the safe, stable and reliable operation of the pipeline system.

[0004] When testing the flange diameter, generally Figure 1 If there is an obvious depression or bulge as shown, the quality can be judged by visual inspection. Therefore, the difficulty of detection lies in Figure 2 The transitional depression or protrusion with a long arc length shown in the figure can only detect whether the flange diameter is qualified by the inspection personnel using tools such as calipers and performing multi-point measurements. It is easy to miss the inspection, which affects the inspection accuracy. Therefore, a flange diameter acceptance inspection device and method are proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for detecting the acceptability of flange diameter, so as to solve the problem raised in the above background technology that "for transitional depressions or protrusions with a long arc length, only inspectors can use tools such as calipers to perform multi-point measurements to detect whether the flange diameter is qualified, and it is easy to miss the detection, affecting the detection accuracy."

[0006] To achieve the above object, the present invention provides the following technical solution: a flange diameter acceptance detection device, comprising a detection table, the upper surface of which is installed with a placement mechanism for placing the flange, a support mechanism for positioning the flange, a driving mechanism for driving the flange to rotate, and an outer diameter detection mechanism for detecting the acceptance of the flange outer diameter, and the upper surface of the support mechanism is provided with an inner diameter detection mechanism for detecting the acceptance of the flange inner diameter;

[0007] In the process of detecting the qualified degree of flange diameter, the present invention converts the squeezing force of the inner wall on the rubber airbag when the flange rotates into the inclination value of the telescopic rod, and converts the friction transmission of the outer wall on the rotating plate when the flange rotates into the displacement value of the sliding sleeve. By changing the force of the concave or convex parts of the inner and outer walls of the flange on the rubber airbag and the rotating plate, the changes in the inclination value and the displacement value are obtained, thereby detecting the qualified degree of flange diameter.

[0008] The support mechanism includes three turntables, a positioning column is fixedly connected to the middle of the upper surface of the turntable, and a rubber airbag is sleeved on the outer wall of the positioning column. The drive mechanism includes two drive motors, and one end of the output shaft of the drive motor is fixedly connected to the drive disk;

[0009] Under the above settings, after the flange is placed on the vertical pole, the screw is rotated clockwise to move the nut seat downward along the outer wall of the screw rod, the nut seat pushes the transmission rod, and the transmission rod pushes the three slide seats to move outward synchronously until the three rubber airbags press against the inner wall of the flange to position the flange so that the center of the flange converges with the center of the three rubber airbags, the rubber airbags are deformed, and the rubber airbags are squeezed. The gas in the rubber airbags will enter the piston cylinder and push the piston block to move upward. The piston block drives the lifting rod and the circular plate to move upward. Once the spring is stretched, one end of the piston rod of the electric cylinder is stretched to push the driving disk against the flange. The driving motor drives the driving disk to rotate slowly, which can drive the flange to rotate.

[0010] The inner diameter detection mechanism includes three piston cylinders, the inner wall of the piston cylinder is slidably connected with a piston block, the upper surface of the piston block is fixedly connected with a lifting rod, the upper part of the outer wall of the lifting rod is fixedly connected with a circular plate, the lower surface of the circular plate and the upper surface of the piston cylinder are fixedly connected with a spring one, the top of the lifting rod is rotatably connected with a rotating block through a bearing, a telescopic rod is hinged between the outer walls of each two adjacent rotating blocks, an inclination sensor is installed on the upper surface of the telescopic rod, the outer diameter detection mechanism includes a rotating plate, the upper surface of the rotating plate is fixedly connected with a bracket, the outer wall of the bracket is slidably connected with a sliding sleeve, the upper surface of the sliding sleeve is installed with a displacement sensor, the middle part of the outer wall of the bracket is fixedly connected with a positioning block, and a spring three is fixedly connected between the positioning block and the opposite side of the sliding sleeve.

[0011] When testing the inner diameter, the flange is rotated, and each point of the inner wall of the flange will squeeze the rubber airbag. When the concave part of the inner wall of the flange contacts the rubber airbag, the squeezing force on the rubber airbag is reduced. Under the pulling force of the spring, the piston block moves downward to drive one end of the telescopic rod to lower. Similarly, when the convex part of the inner wall of the flange contacts the rubber airbag, the squeezing force on the rubber airbag increases, and the gas in the rubber airbag is squeezed into the piston cylinder again, thereby pushing the piston block to move upward and driving one end of the telescopic rod to rise. In this way, the inclination value detected by the inclination sensor will change. If the inclination is too large or the inclination occurs frequently, it means that the concave or convex part of the inner wall of the flange is too large or there are too many concave and convex parts, which can be judged as unqualified. When testing the pass of the inner diameter of the flange, the clamping rod supports the connecting rod, the second spring is in an elongated state, and the rotating plate is kept away from the flange. When it is necessary to test the pass of the outer diameter of the flange, the clamping rod is lifted, the second spring is extended to drive the movable block close to the flange, so that the rotating plate supports the outer wall of the flange, and the driving motor drives the driving disk to move quickly. The rotation speed of the flange is accelerated, and the rotation of the flange drives the rotating plate to rotate. The sleeve slides to the outside of the rotating plate under the action of centrifugal force, and the spring three is stretched. When the concave part of the outer wall of the flange contacts the rotating plate, the outer diameter of the flange at that place becomes shorter, the clockwise rotation speed of the rotating plate slows down, and the centrifugal force on the sleeve decreases. The spring three pulls the sleeve close to the middle of the rotating plate, the displacement of the sleeve decreases, and the value detected by the displacement sensor decreases. Similarly, when the convex part of the outer wall of the flange contacts the rotating plate, the outer diameter of the flange at that place becomes longer, the clockwise rotation speed of the rotating plate accelerates, and the centrifugal force on the sleeve increases. The sleeve continues to slide to the outside of the rotating plate, the displacement of the sleeve increases, and the value detected by the displacement sensor increases. If the change value detected by the displacement sensor is too small, too large, or the deviation occurs frequently, it means that the outer wall of the flange is too concave, too convex, or there are too many concave and convex parts, which can be judged as unqualified; the sleeve and the displacement sensor are set in two groups to maintain symmetry and prevent vibration when the rotating plate rotates;

[0012] In this way, the diameter conformity of each point on the inner and outer walls of the flange can be automatically detected, which reduces the workload of the inspectors, avoids omissions, and improves the detection accuracy.

[0013] As a further preferred embodiment of the technical solution: the placement mechanism includes three uprights and three vertical plates, the bottoms of the uprights and the vertical plates are symmetrically fixedly connected to the upper surface of the detection platform, the vertical plates are located on the periphery of the uprights, the tops of the outer walls of the vertical plates are slidably connected with slides, the upper surface of the slides are threadedly connected with pressure rods, the bottom ends of the pressure rods are fixedly connected with uprights, the bottom ends of the uprights and the top ends of the uprights are provided with balls, the top ends of the pressure rods are fixedly connected with knob one, the upper surfaces of the vertical plates are threadedly connected with locking rods, and the top ends of the locking rods are fixedly connected with knob two.

[0014] Under the above settings, place the flange on the pole, move the slide plate to move the pressure rod to just above the pole, rotate the pressure rod clockwise to drive the column to move downward and press the flange, which can limit the flange to prevent it from tilting during rotation. The setting of the ball can reduce the friction between the flange and the pole and column.

[0015] As a further preferred embodiment of the present technical solution: a screw rod is rotatably connected to the middle part of the upper surface of the detection platform via a bearing, the outer side wall of the screw rod is threadedly connected to a nut seat, the outer side wall of the nut seat is symmetrically hinged with three transmission rods, the bottom end of the transmission rod is hinged with a sliding seat, the upper surface of the sliding seat is rotatably connected to a turntable via a bearing, three slide rails are symmetrically and fixedly connected to the upper surface of the detection platform, the outer side wall of the sliding seat is slidably connected to the inner side wall of the slide rail, the top of the screw rod is fixedly connected to a turning handle, two positioning rods are symmetrically and fixedly connected to the middle part of the upper surface of the detection platform, and the positioning rods are slidably connected to the nut seat; the nut seat slides on the outer side wall of the positioning rod to avoid the rotation of the nut seat screw rod.

[0016] The bottom of the piston cylinder is fixedly connected to the middle of the upper surface of the positioning column. A channel is provided inside the positioning column. A connecting pipe is provided on the inner wall of the channel. The rubber airbag is connected to the piston cylinder through the connecting pipe.

[0017] Under the above setting, the rubber airbag can remain connected with the piston cylinder. If the squeezing pressure on the rubber airbag increases, the gas enters the piston cylinder to push the piston block up. If the squeezing pressure on the rubber airbag decreases, the gas in the piston cylinder returns to the inside of the rubber airbag and the piston block descends.

[0018] As a further preferred embodiment of the present technical solution: two slide grooves are symmetrically provided on the upper surface of the detection platform, the inner side walls of the slide grooves are slidably connected with sliders, the outer side walls of the detection platform are symmetrically fixedly connected with two supporting plates, a driving electric cylinder is installed on the upper surface of the supporting plate, one end of the piston rod of the driving electric cylinder is fixedly connected to the outer side wall of the slider, and the bottom of the driving motor is installed on the upper surface of the slider.

[0019] Under the above setting, one end of the piston rod of the driving electric cylinder is extended to drive the slider close to the flange, which can drive the two driving disks to press against the two sides of the outer wall of the flange. The two driving motors drive the two driving disks to rotate counterclockwise, which can provide friction transmission force from both sides to drive the flange to rotate clockwise. The two symmetrically arranged driving disks can make the flange evenly stressed.

[0020] As a further preferred embodiment of the present technical solution: the telescopic rod includes a plate body, one side of the plate body is hinged to the outer side wall of the rotating block, the other side of the plate body is provided with a blind groove, the inner side wall of the blind groove is slidably connected with a slide bar, and the end of the slide bar away from the plate body is hinged to the outer side wall of the rotating block; when the distance between the three slide seats changes, the slide bar can slide on the inner side wall of the blind groove to make applicability adjustments.

[0021] As a further preferred embodiment of the present technical solution: a vertical plate is fixedly connected to the front side of the upper surface of the detection platform, two sliding rods are symmetrically slidably connected to the outer side wall of the vertical plate, a movable block is fixedly connected to the rear end of the sliding rod, a connecting rod is fixedly connected to the front end of the sliding rod, a spring 2 is fixedly connected between the front surface of the movable block and the rear surface of the vertical plate, the upper surface of the movable block is rotatably connected to a rotating rod via a bearing, and the top end of the rotating rod is fixedly connected to a rotating plate.

[0022] As a further preferred embodiment of the technical solution: a clamping rod is hinged on the upper part of the front surface of the vertical plate, a clamping groove is opened on the top of the rear surface of the connecting rod, and a pull ring is fixedly connected to the front surface of the connecting rod.

[0023] Under the above settings, before detecting the inner diameter, the pull ring is pulled outward to drive the connecting rod, the sliding rod and the movable block to move outward, the spring 2 is compressed, the clamping rod is lowered, the clamping rod is clamped in the clamping slot, and the rotating plate is kept away from the flange during the process of detecting the inner diameter. When detecting the outer diameter, the clamping rod is lifted, the spring 2 will extend to push the rotating plate to contact the outer wall of the flange, so that when the flange rotates, the rotating plate can be driven to rotate through the friction transmission force.

[0024] As a further preferred embodiment of the present technical solution: the outer side walls of the driving disc and the rotating plate are both sleeved with rubber sleeves; the provision of the rubber sleeves greatly increases the friction between the flange and the driving disc and the rotating plate, thereby avoiding slipping.

[0025] The present invention also provides a method for using the flange diameter acceptance detection device, comprising the following steps:

[0026] S1. Position the flange, place the flange on the vertical pole, turn the screw clockwise to move the nut seat downward to push the three transmission rods, the transmission rods push the three slides outward synchronously, and the three rubber airbags support the inner wall of the flange;

[0027] S2, the driving flange rotates, the driving motor drives the driving disc to rotate, the driving disc drives the flange to rotate, and when the flange rotates, the inner wall squeezes the rubber airbag;

[0028] S3. Check the pass rate of the flange inner diameter. When the concave part of the flange inner wall contacts the rubber airbag, the squeezing force on the rubber airbag is reduced, and when the convex part contacts the rubber airbag, the squeezing force is increased. Correspondingly, the piston block will move down or up to drive one end of the telescopic rod to lower or rise, so that the inclination detected by the inclination sensor will change.

[0029] S4. Check the conformity of the flange outer diameter. The rotation of the flange drives the rotating plate to rotate, and the sleeve slides outward under the action of centrifugal force. When the concave part of the flange outer wall contacts the rotating plate, the flange outer diameter at that place becomes shorter, the clockwise rotation speed of the rotating plate slows down, the centrifugal force on the sleeve decreases, the displacement decreases, and the value detected by the displacement sensor will decrease. Conversely, when the convex part of the flange outer wall contacts the rotating plate, the value detected by the displacement sensor will increase.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. In the process of detecting the conformity of the flange diameter, the present invention converts the squeezing force of the inner wall on the rubber airbag when the flange rotates into the inclination value of the telescopic rod, and converts the friction transmission of the outer wall on the rotating plate when the flange rotates into the displacement value of the sliding sleeve. By changing the force of the recessed or raised parts of the inner and outer walls of the flange on the rubber airbag and the rotating plate, the changes in the inclination value and the displacement value are obtained, thereby detecting the conformity of the flange diameter.

[0032] 2. When the present invention detects the inner diameter, the flange is rotated, and each point of the inner wall of the flange will squeeze the rubber airbag. When the recessed part of the inner wall of the flange contacts the rubber airbag, the squeezing force on the rubber airbag is reduced. Under the pulling force of the spring, the piston block moves downward to drive one end of the telescopic rod to lower. Similarly, when the raised part of the inner wall of the flange contacts the rubber airbag, the squeezing force on the rubber airbag increases, and the gas in the rubber airbag is squeezed into the piston cylinder again, thereby pushing the piston block to move upward to drive one end of the telescopic rod to rise. In this way, the inclination value detected by the inclination sensor will change.

[0033] 3. When the present invention detects the pass rate of the flange outer diameter, the clamping rod is lifted, and the second spring is extended to drive the movable block close to the flange, so that the rotating plate presses against the outer wall of the flange, and the driving motor drives the driving disk to rotate rapidly, thereby accelerating the rotation speed of the flange. The rotation of the flange drives the rotating plate to rotate, and the sleeve slides outward under the action of centrifugal force. When the recessed part of the flange outer wall contacts the rotating plate, the outer diameter of the flange at that place becomes shorter, the clockwise rotation speed of the rotating plate slows down, the centrifugal force received by the sleeve decreases, the displacement decreases, and the value detected by the displacement sensor decreases. Similarly, when the raised part of the flange outer wall contacts the rotating plate, the outer diameter of the flange at that place becomes longer, the clockwise rotation speed of the rotating plate accelerates, the centrifugal force received by the sleeve increases, the displacement increases, and the value detected by the displacement sensor increases.

[0034] 4. The present invention can automatically detect the diameter qualification of each point on the inner and outer walls of the flange by rotating the flange, thereby reducing the workload of the inspectors, preventing omissions, and improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of a flange structure with obvious depression or protrusion in the prior art of the present invention;

[0036] Figure 2 It is a schematic diagram of a flange structure with a transitional depression or protrusion in the prior art of the present invention;

[0037] Figure 3 It is a schematic diagram of the main structure of the present invention;

[0038] Figure 4 It is a front view structural schematic diagram of the present invention;

[0039] Figure 5 It is a structural schematic diagram of the nut seat and the transmission rod in the present invention;

[0040] Figure 6 It is a partial cross-sectional structural schematic diagram of the present invention;

[0041] Figure 7 For the present invention Figure 6 A magnified view of the structure of area A;

[0042] Figure 8 It is a structural schematic diagram of the driving motor and the driving disk in the present invention;

[0043] Fig. 9 It is a structural schematic diagram of the movable block and the rotating plate in the present invention;

[0044] Fig.10 It is a structural schematic diagram of the telescopic rod and the inclination sensor in the present invention;

[0045] Fig.11 It is a schematic cross-sectional structural diagram of the telescopic rod in the present invention;

[0046] Fig.12 It is a schematic diagram of the structure of the column and the ball in the present invention.

[0047] In the figure:

[0048] 1. Testing table; 2. Placing mechanism; 3. Support mechanism; 4. Driving mechanism; 5. Inner diameter testing mechanism; 6. Outer diameter testing mechanism; 7. Rubber sleeve;

[0049] 21. upright pole; 22. vertical board; 23. slide plate; 24. pressure rod; 25. upright pole; 26. ball bearing; 27. knob 1; 28. locking rod; 29. ​​knob 2;

[0050] 31. Slide rail; 32. Slide seat; 33. Turntable; 34. Positioning column; 35. Screw rod; 36. Turn handle; 37. Nut seat; 38. Positioning rod; 39. Transmission rod; 310. Rubber airbag;

[0051] 41. slideway; 42. slider; 43. bearing plate; 44. driving electric cylinder; 45. driving motor; 46. driving disk;

[0052] 51. channel; 52. piston cylinder; 53. connecting pipe; 54. piston block; 55. lifting rod; 56. round plate; 57. spring 1; 58. rotating block; 59. telescopic rod; 591. plate body; 592. blind groove; 593. slide bar; 510. inclination sensor;

[0053] 61. Vertical plate; 62. Sliding rod; 63. Movable block; 64. Connecting rod; 65. Spring 2; 66. Rotating rod; 67. Rotating plate; 68. Bracket; 69. Sliding sleeve; 610. Displacement sensor; 611. Clamping rod; 612. Clamping slot; 613. Pull ring; 614. Positioning block; 615. Spring 3. DETAILED DESCRIPTION

[0054] 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. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limitations on the present application. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0055] See also Figure 3-12 The present invention provides a technical solution: a flange diameter acceptance detection device, comprising a detection platform 1, a placement mechanism 2 for placing a flange, a support mechanism 3 for positioning the flange, a driving mechanism 4 for driving the flange to rotate, and an outer diameter detection mechanism 6 for detecting the acceptance of the flange outer diameter are installed on the upper surface of the detection platform 1, and an inner diameter detection mechanism 5 for detecting the acceptance of the flange inner diameter is provided on the upper surface of the support mechanism 3;

[0056] In the process of detecting the passability of the flange diameter, the present invention converts the squeezing force of the inner wall on the rubber airbag 310 when the flange rotates into the inclination value of the telescopic rod 59, and converts the friction transmission of the outer wall on the rotating plate 67 when the flange rotates into the displacement value of the sliding sleeve 69. By changing the force of the concave or convex parts of the inner and outer walls of the flange on the rubber airbag 310 and the rotating plate 67, the changes in the inclination value and the displacement value are obtained, thereby detecting the passability of the flange diameter.

[0057] The support mechanism 3 includes three rotating disks 33, a positioning column 34 is fixedly connected to the middle of the upper surface of the rotating disk 33, and a rubber airbag 310 is sleeved on the outer wall of the positioning column 34. The driving mechanism 4 includes two driving motors 45, and one end of the output shaft of the driving motor 45 is fixedly connected to the driving disk 46;

[0058] Under the above settings, after the flange is placed on the vertical rod 21, the screw rod 35 is rotated clockwise to make the nut seat 37 move downward along the outer wall of the screw rod 35, and the nut seat 37 pushes the transmission rod 39, and the transmission rod 39 pushes the three slide seats 32 to move outward synchronously until the three rubber airbags 310 press against the inner wall of the flange to position the flange, so that the center of the flange is consistent with the center of the three rubber airbags 310, and the rubber airbags 310 are deformed and squeezed. The gas in the rubber airbags 310 will enter the piston cylinder 52 and push the piston block 54 to move upward. The piston block 54 drives the lifting rod 55 and the circular plate 56 to move upward, and the spring 57 is stretched, and one end of the piston rod of the electric cylinder 44 is stretched to push the drive disk 46 against the flange, and the drive motor 45 drives the drive disk 46 to rotate slowly, which can drive the flange to rotate;

[0059] The inner diameter detection mechanism 5 includes three piston cylinders 52, the inner side wall of the piston cylinder 52 is slidably connected with a piston block 54, the upper surface of the piston block 54 is fixedly connected with a lifting rod 55, the upper part of the outer side wall of the lifting rod 55 is fixedly connected with a circular plate 56, a spring 57 is fixedly connected between the lower surface of the circular plate 56 and the upper surface of the piston cylinder 52, the top of the lifting rod 55 is rotatably connected with a rotating block 58 through a bearing, a telescopic rod 59 is hinged between the outer side walls of each adjacent two rotating blocks 58, and an inclination sensor 510 is installed on the upper surface of the telescopic rod 59. The outer diameter detection mechanism 6 includes a rotating plate 67, the upper surface of the rotating plate 67 is fixedly connected with a bracket 68, the outer side wall of the bracket 68 is slidably connected with a sliding sleeve 69, the upper surface of the sliding sleeve 69 is installed with a displacement sensor 610, a positioning block 614 is fixedly connected to the middle part of the outer side wall of the bracket 68, and a spring 3 615 is fixedly connected between the positioning block 614 and the opposite side of the sliding sleeve 69.

[0060] In order to avoid the problem that "for transitional depressions or protrusions with a long arc length, only the inspectors can detect whether the flange diameter is qualified by multi-point measurement with the help of tools such as calipers, and it is easy to miss the inspection, which affects the inspection accuracy", the present invention rotates the flange when inspecting the inner diameter, and each point of the inner wall of the flange will squeeze the rubber airbag 310. When the depression of the inner wall of the flange contacts the rubber airbag 310, the squeezing force on the rubber airbag 310 is reduced. Under the pulling force of spring 57, the piston block 54 moves downward to drive one end of the telescopic rod 59 to lower. Similarly, when the protrusion of the inner wall of the flange contacts the rubber airbag 310, the rubber airbag 310 is squeezed. The squeezing force of the bag 310 increases, and the gas in the rubber bag 310 is squeezed into the piston cylinder 52 again, thereby pushing the piston block 54 to move upward and driving one end of the telescopic rod 59 to rise. In this way, the inclination value detected by the inclination sensor 510 will change. If the inclination is too large or the inclination occurs frequently, it means that the inner wall of the flange is too concave or convex or there are too many concave and convex parts, which can be judged as unqualified; when testing the pass of the flange inner diameter, the clamping rod 611 supports the connecting rod 64, the spring 65 is in an elongated state, and the rotating plate 67 is kept away from the flange. When it is necessary to test the pass of the flange outer diameter, the clamping rod 611 is lifted, the spring 65 is lifted, and the rotating plate 67 is kept away from the flange. The extension drives the movable block 63 close to the flange, so that the rotating plate 67 presses against the outer wall of the flange. The driving motor 45 drives the driving disk 46 to rotate quickly, which speeds up the rotation of the flange. The rotation of the flange drives the rotating plate 67 to rotate. The sleeve 69 slides to the outside of the rotating plate 67 under the action of centrifugal force. The spring three 615 is stretched. When the concave part of the outer wall of the flange contacts the rotating plate 67, the outer diameter of the flange becomes shorter, the clockwise rotation speed of the rotating plate 67 slows down, and the centrifugal force on the sleeve 69 decreases. The spring three 615 pulls the sleeve 69 close to the middle of the rotating plate 67, the displacement of the sleeve 69 decreases, and the value detected by the displacement sensor 610 decreases. Similarly, when the protrusion of the outer wall of the flange contacts the rotating plate 67, the outer diameter of the flange at that place becomes longer, the clockwise rotation speed of the rotating plate 67 increases, the centrifugal force on the sliding sleeve 69 increases, the sliding sleeve 69 continues to slide to the outside of the rotating plate 67, the displacement of the sliding sleeve 69 increases, and the value detected by the displacement sensor 610 increases. If the change value detected by the displacement sensor 610 is too small, too large, or the deviation occurs frequently, it means that the outer wall of the flange is too concave, too protruding, or has too many concave and convex parts, which can be judged as unqualified; the sliding sleeve 69 and the displacement sensor 610 are set in two groups to maintain symmetry and prevent vibration when the rotating plate 67 rotates;

[0061] In this way, the diameter conformity of each point on the inner and outer walls of the flange can be automatically detected, which reduces the workload of the inspectors, avoids omissions, and improves the detection accuracy.

[0062] In this embodiment, specifically: the placement mechanism 2 includes three vertical poles 21 and three vertical plates 22, the bottoms of the vertical poles 21 and the vertical plates 22 are symmetrically fixedly connected to the upper surface of the detection platform 1, the vertical plates 22 are located on the periphery of the vertical poles 21, and the top of the outer wall of the vertical plates 22 is slidably connected with a slide plate 23, the upper surface of the slide plate 23 is threadedly connected with a pressure rod 24, the bottom end of the pressure rod 24 is fixedly connected with a column 25, the bottom end of the column 25 and the top of the vertical pole 21 are both provided with balls 26, the top of the pressure rod 24 is fixedly connected with a knob 1 27, the upper surface of the vertical plate 22 is threadedly connected with a locking rod 28, and the top of the locking rod 28 is fixedly connected with a knob 29.

[0063] Under the above settings, the flange is placed on the vertical pole 21, the slide plate 23 is moved to move the pressure rod 24 to the top of the vertical pole 21, and the pressure rod 24 is rotated clockwise to drive the column 25 to move downward to press the flange, which can limit the flange to prevent the flange from tilting during the rotation process. The setting of the ball 26 can reduce the friction between the flange and the vertical pole 21 and the column 25.

[0064] In this embodiment, specifically: a screw rod 35 is rotatably connected to the middle part of the upper surface of the testing platform 1 through a bearing, the outer wall of the screw rod 35 is threadedly connected to a nut seat 37, the outer wall of the nut seat 37 is symmetrically hinged with three transmission rods 39, the bottom end of the transmission rod 39 is hinged with a slide seat 32, the upper surface of the slide seat 32 is rotatably connected to a turntable 33 through a bearing, the upper surface of the testing platform 1 is symmetrically fixedly connected to three slide rails 31, the outer wall of the slide seat 32 is slidably connected to the inner wall of the slide rail 31, the top of the screw rod 35 is fixedly connected to a turning handle 36, and two positioning rods 38 are symmetrically fixedly connected to the middle part of the upper surface of the testing platform 1, and the positioning rod 38 is slidably connected to the nut seat 37; the nut seat 37 slides on the outer wall of the positioning rod 38 to avoid the rotation of the screw rod 35 of the nut seat 37.

[0065] In this embodiment, specifically: the bottom of the piston cylinder 52 is fixedly connected to the middle of the upper surface of the positioning column 34, a channel 51 is provided inside the positioning column 34, and a connecting tube 53 is provided on the inner wall of the channel 51. The rubber airbag 310 and the piston cylinder 52 are connected through the connecting tube 53.

[0066] Under the above setting, the rubber airbag 310 can maintain communication with the piston cylinder 52. If the squeezing force on the rubber airbag 310 increases, the gas enters the piston cylinder 52 to push up the piston block 54. If the squeezing force on the rubber airbag 310 decreases, the gas in the piston cylinder 52 returns to the inside of the rubber airbag 310 and the piston block 54 descends.

[0067] In this embodiment, specifically: two slide grooves 41 are symmetrically opened on the upper surface of the detection platform 1, and the inner wall of the slide groove 41 is slidably connected with a slider 42, and the outer wall of the detection platform 1 is symmetrically fixedly connected with two supporting plates 43, and the upper surface of the supporting plate 43 is installed with a driving electric cylinder 44, one end of the piston rod of the driving electric cylinder 44 is fixedly connected to the outer wall of the slider 42, and the bottom of the driving motor 45 is installed on the upper surface of the slider 42.

[0068] Under the above setting, one end of the piston rod of the driving electric cylinder 44 is extended to drive the slider 42 close to the flange, which can drive the two driving disks 46 to press against the two sides of the outer wall of the flange. The two driving motors 45 drive the two driving disks 46 to rotate counterclockwise, and can provide friction transmission force from both sides to drive the flange to rotate clockwise. The two symmetrically arranged driving disks 46 can make the flange evenly stressed.

[0069] In this embodiment, specifically: the telescopic rod 59 includes a plate body 591, one side of the plate body 591 is hinged to the outer wall of the rotating block 58, and the other side of the plate body 591 is provided with a blind groove 592, and the inner wall of the blind groove 592 is slidably connected with a slide bar 593, and the end of the slide bar 593 away from the plate body 591 is hinged to the outer wall of the rotating block 58; when the distance between the three slide seats 32 changes, the slide bar 593 can slide on the inner wall of the blind groove 592 to make applicability adjustments.

[0070] In this embodiment, specifically: a vertical plate 61 is fixedly connected to the front side of the upper surface of the testing platform 1, two sliding rods 62 are symmetrically slidably connected to the outer wall of the vertical plate 61, a movable block 63 is fixedly connected to the rear end of the sliding rod 62, a connecting rod 64 is fixedly connected to the front end of the sliding rod 62, a spring 65 is fixedly connected between the front surface of the movable block 63 and the rear surface of the vertical plate 61, the upper surface of the movable block 63 is rotatably connected to a rotating rod 66 through a bearing, and a rotating plate 67 is fixedly connected to the top of the rotating rod 66.

[0071] In this embodiment, specifically: a clamping rod 611 is hinged on the upper front surface of the vertical plate 61 , a clamping groove 612 is provided on the top of the rear surface of the connecting rod 64 , and a pull ring 613 is fixedly connected to the front surface of the connecting rod 64 .

[0072] Under the above setting, before detecting the inner diameter, the pull ring 613 is pulled outward to drive the connecting rod 64, the sliding rod 62 and the movable block 63 to move outward, the spring 2 65 is compressed, and the clamping rod 611 is lowered. The clamping rod 611 clamps the clamping groove 612, and the rotating plate 67 remains away from the flange during the process of detecting the inner diameter. When detecting the outer diameter, the clamping rod 611 is lifted, and the spring 2 65 will extend to push the rotating plate 67 to contact the outer wall of the flange, so that when the flange rotates, the rotating plate 67 can be driven to rotate through the friction transmission force.

[0073] In this embodiment, specifically: the outer walls of the driving disk 46 and the rotating plate 67 are both sleeved with rubber sleeves 7; the provision of the rubber sleeves 7 greatly increases the friction between the flange and the driving disk 46 and the rotating plate 67, thereby avoiding slipping.

[0074] The present invention also provides a method for using the flange diameter acceptance detection device, comprising the following steps:

[0075] S1. Position the flange, place the flange on the vertical pole 21, rotate the screw rod 35 clockwise, so that the nut seat 37 moves downward to push the three transmission rods 39, and the transmission rods 39 push the three slide seats 32 outward synchronously, and the three rubber airbags 310 support the inner wall of the flange;

[0076] S2, the driving flange rotates, the driving motor 45 drives the driving disk 46 to rotate, and the driving disk 46 drives the flange to rotate. When the flange rotates, the inner wall squeezes the rubber airbag 310;

[0077] S3, inspecting the pass rate of the inner diameter of the flange. When the concave part of the inner wall of the flange contacts the rubber airbag 310, the squeezing force on the rubber airbag 310 is reduced, and when the convex part contacts the rubber airbag 310, the squeezing force is increased. Correspondingly, the piston block 54 will move down or up to drive one end of the telescopic rod 59 to lower or rise, so that the inclination detected by the inclination sensor 510 will change.

[0078] S4. Check the pass rate of the flange outer diameter. The rotation of the flange drives the rotating plate 67 to rotate, and the sleeve 69 slides outward under the action of centrifugal force. When the concave part of the flange outer wall contacts the rotating plate 67, the flange outer diameter at this place becomes shorter, the clockwise rotation speed of the rotating plate 67 slows down, the centrifugal force on the sleeve 69 decreases, the displacement decreases, and the value detected by the displacement sensor 610 will decrease. Conversely, when the protrusion of the flange outer wall contacts the rotating plate 67, the value detected by the displacement sensor 610 will increase.

[0079] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flange diameter acceptance detection device, characterized in that: The invention comprises a testing platform (1), wherein a placement mechanism (2) for placing a flange, a support mechanism (3) for positioning the flange, a drive mechanism (4) for driving the flange to rotate, and an outer diameter detection mechanism (6) for detecting the passability of the outer diameter of the flange are installed on the upper surface of the testing platform (1); an inner diameter detection mechanism (5) for detecting the passability of the inner diameter of the flange is provided on the upper surface of the support mechanism (3); The support mechanism (3) comprises three rotating disks (33), a positioning column (34) is fixedly connected to the middle of the upper surface of the rotating disk (33), and a rubber airbag (310) is sleeved on the outer wall of the positioning column (34). The driving mechanism (4) comprises two driving motors (45), and one end of the output shaft of the driving motor (45) is fixedly connected to the driving disk (46); The inner diameter detection mechanism (5) comprises three piston cylinders (52), the inner side wall of the piston cylinder (52) is slidably connected to a piston block (54), the upper surface of the piston block (54) is fixedly connected to a lifting rod (55), the upper part of the outer side wall of the lifting rod (55) is fixedly connected to a circular plate (56), a spring (57) is fixedly connected between the lower surface of the circular plate (56) and the upper surface of the piston cylinder (52), the top end of the lifting rod (55) is rotatably connected to a rotating block (58) via a bearing, and a telescopic spring (57) is hinged between the outer side walls of each adjacent two rotating blocks (58). rod (59), an inclination sensor (510) is installed on the upper surface of the telescopic rod (59), the outer diameter detection mechanism (6) comprises a rotating plate (67), the upper surface of the rotating plate (67) is fixedly connected to a bracket (68), the outer side wall of the bracket (68) is symmetrically slidably connected to two sliding sleeves (69), the upper surface of the sliding sleeve (69) is installed with a displacement sensor (610), the middle part of the outer side wall of the bracket (68) is fixedly connected to a positioning block (614), and a spring three (615) is fixedly connected between the positioning block (614) and the opposite side of the sliding sleeve (69); The bottom of the piston cylinder (52) is fixedly connected to the middle of the upper surface of the positioning column (34); a channel (51) is provided inside the positioning column (34); a connecting tube (53) is provided on the inner wall of the channel (51); the rubber airbag (310) and the piston cylinder (52) are connected via the connecting tube (53).

2. The flange diameter acceptance detection device according to claim 1 is characterized in that: The placement mechanism (2) comprises three vertical poles (21) and three vertical plates (22); the bottoms of the vertical poles (21) and the vertical plates (22) are symmetrically fixedly connected to the upper surface of the detection platform (1); the vertical plates (22) are located on the periphery of the vertical poles (21); a slide plate (23) is slidably connected to the top of the outer wall of the vertical plate (22); a pressure rod (24) is threadedly connected to the upper surface of the slide plate (23); the bottom end of the pressure rod (24) is fixedly connected to a column (25); the bottom end of the column (25) and the top end of the vertical pole (21) are both provided with a ball bearing (26); the top end of the pressure rod (24) is fixedly connected to a knob 1 (27); the upper surface of the vertical plate (22) is threadedly connected to a locking rod (28); the top end of the locking rod (28) is fixedly connected to a knob 2 (29).

3. The flange diameter acceptance detection device according to claim 2 is characterized in that: A screw rod (35) is rotatably connected to the middle part of the upper surface of the detection platform (1) via a bearing, the outer wall of the screw rod (35) is threadedly connected to a nut seat (37), the outer wall of the nut seat (37) is symmetrically hinged with three transmission rods (39), the bottom end of the transmission rod (39) is hinged with a slide seat (32), the upper surface of the slide seat (32) is rotatably connected to a turntable (33) via a bearing, the upper surface of the detection platform (1) is symmetrically fixedly connected to three slide rails (31), the outer wall of the slide seat (32) is slidably connected to the inner wall of the slide rail (31), the top of the screw rod (35) is fixedly connected to a turning handle (36), and two positioning rods (38) are symmetrically fixedly connected to the middle part of the upper surface of the detection platform (1), and the positioning rods (38) are slidably connected to the nut seat (37).

4. The flange diameter acceptance detection device according to claim 3 is characterized in that: The upper surface of the detection platform (1) is symmetrically provided with two slide grooves (41), the inner side walls of the slide grooves (41) are slidably connected with a slider (42), the outer side walls of the detection platform (1) are symmetrically fixedly connected with two bearing plates (43), the upper surface of the bearing plate (43) is mounted with a driving electric cylinder (44), one end of the piston rod of the driving electric cylinder (44) is fixedly connected to the outer side wall of the slider (42), and the bottom of the driving motor (45) is mounted on the upper surface of the slider (42).

5. The flange diameter acceptance detection device according to claim 4 is characterized in that: The telescopic rod (59) comprises a plate body (591), one side of the plate body (591) is hinged to the outer side wall of the rotating block (58), the other side of the plate body (591) is provided with a blind groove (592), the inner side wall of the blind groove (592) is slidably connected to a slide bar (593), and one end of the slide bar (593) away from the plate body (591) is hinged to the outer side wall of the rotating block (58).

6. The flange diameter acceptance detection device according to claim 5 is characterized in that: A vertical plate (61) is fixedly connected to the front side of the upper surface of the detection platform (1); two sliding rods (62) are symmetrically slidably connected to the outer side wall of the vertical plate (61); a movable block (63) is fixedly connected to the rear end of the sliding rod (62); a connecting rod (64) is fixedly connected to the front end of the sliding rod (62); a second spring (65) is fixedly connected between the front surface of the movable block (63) and the rear surface of the vertical plate (61); a rotating rod (66) is rotatably connected to the upper surface of the movable block (63) via a bearing; and a rotating plate (67) is fixedly connected to the top end of the rotating rod (66).

7. The flange diameter acceptance detection device according to claim 6 is characterized in that: A clamping rod (611) is hingedly connected to the upper portion of the front surface of the vertical plate (61), a clamping groove (612) is provided at the top of the rear surface of the connecting rod (64), and a pull ring (613) is fixedly connected to the front surface of the connecting rod (64).

8. The flange diameter acceptance detection device according to claim 7 is characterized in that: The outer side walls of the driving disc (46) and the rotating plate (67) are both sleeved with rubber sleeves (7).

9. A method for using the flange diameter acceptance detection device according to claim 8, characterized in that: The following steps are involved: S1. Position the flange, place the flange on the vertical rod (21), rotate the screw rod (35) clockwise, so that the nut seat (37) moves downward to push the three transmission rods (39), and the transmission rods (39) push the three slide seats (32) outward synchronously, and the three rubber airbags (310) support the inner wall of the flange; S2, the driving flange rotates, the driving motor (45) drives the driving disk (46) to rotate, and the driving disk (46) drives the flange to rotate. When the flange rotates, the inner wall squeezes the rubber airbag (310); S3, inspecting the pass rate of the inner diameter of the flange. When the concave portion of the inner wall of the flange contacts the rubber airbag (310), the squeezing force on the rubber airbag (310) is reduced, and when the convex portion contacts the rubber airbag (310), the squeezing force is increased. Correspondingly, the piston block (54) moves downward or upward to drive one end of the telescopic rod (59) to lower or raise, so that the inclination detected by the inclination sensor (510) will change. S4. Check the pass rate of the flange outer diameter. The rotation of the flange drives the rotating plate (67) to rotate. The sliding sleeve (69) slides outward under the action of centrifugal force. When the concave part of the flange outer wall contacts the rotating plate (67), the flange outer diameter at that part becomes shorter, the clockwise rotation speed of the rotating plate (67) slows down, the centrifugal force on the sliding sleeve (69) decreases, the displacement decreases, and the value detected by the displacement sensor (610) decreases. On the contrary, when the protrusion of the flange outer wall contacts the rotating plate (67), the value detected by the displacement sensor (610) increases.

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