Defect detection equipment for valve casting production

Abstract

The invention relates to the technical field of detection equipment, in particular to defect detection equipment for valve casting production, which comprises a frame with a section in a concave shape with an upward opening, the side wall of the frame is fixedly connected with a hood, and the upper surface of the hood is fixedly connected with a fixed seat. The fixed seat is of a hollow structure; a detection mechanism is arranged on the fixed seat, the detection mechanism is composed of a testing assembly and a light supplementing assembly, the testing assembly is used for detecting defects, the light supplementing assembly is used for providing light of different colors, the testing assembly comprises a bent pipe, the bent pipe is fixedly connected with the top wall of the fixed seat in a penetrating mode, and the bent pipe is connected with a sliding column in a sealed and sliding mode. The lower surface of the sliding column is fixedly connected with a lifting plate. The detection equipment has the advantages that the detection equipment is lower in cost, the detection accuracy is greatly improved through rotary scanning and light supplement of various light sources, and meanwhile, the automation degree is higher, and the detection efficiency is higher.

Description

Technical Field

[0001] The invention relates to the technical field of detection equipment, and in particular to a defect detection equipment for valve casting production. Background Art

[0002] Pipeline transportation is one of the common transportation methods. As the name suggests, pipeline transportation is the transportation of materials through pipelines. It is mainly used for the transportation of liquid materials or gaseous materials. In pipeline transportation, in addition to the main transportation pipeline, other components are also required to complete the entire pipeline transportation. Among them, valves are one of the main components. Valves are used to open and close pipelines and control flow directions in pipelines. At the same time, they can also adjust and control the parameters of the conveying medium, such as temperature, pressure and flow rate. Therefore, valves are divided into shut-off valves, check valves, regulating valves, etc. according to their different functions. There are many ways to produce valves, and casting is one of them. The molten metal is poured into the casting mold, and the mold is taken out after the metal solidifies to obtain the required valve parts. Due to the casting production method, the product may have certain defects, such as sand holes, pores, cracks, etc. Therefore, defect detection is required after casting is completed.

[0003] In the prior art, defect detection equipment generally uses cameras to scan castings to detect defects. In order to ensure comprehensive detection, multiple cameras are generally required to be set up, and the setting of multiple cameras requires greater equipment costs. At the same time, during detection, the existing detection equipment generally uses a single light source for fill lighting, and the accuracy of its detection results is generally average. During detection, manual valve placement is required, and after the detection is completed, manual unloading and classification are required based on the detection results. While the labor intensity is high, the detection efficiency is also average. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to propose a defect detection device for valve casting production.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A defect detection device for valve casting production, comprising a frame with an opening facing upward in a concave shape, a hood fixedly connected to the side wall of the frame, a fixing seat fixedly connected to the upper surface of the hood, and the fixing seat being a hollow structure; The fixing seat is provided with a detection mechanism, which is composed of a test assembly and a fill light assembly, the test assembly is used to detect defects, the fill light assembly is used to provide illumination of different colors, the test assembly includes a bent pipe, the bent pipe is fixedly connected to the top wall of the fixing seat, the bent pipe is sealingly and slidably connected to a sliding column, the lower surface of the sliding column is fixedly connected to a lifting plate, the lower surface of the lifting plate is fixedly connected to a screw, the screw is threadedly connected to a rotating column, and the side wall of the rotating column is fixedly connected to a detection camera; A driving mechanism is arranged in the hood, and the driving mechanism is composed of a lifting assembly and a conveying assembly. The lifting assembly is used to drive the lifting and lowering of the lifting plate, and the conveying assembly is used to convey the product. The lifting assembly includes a driving shaft, and the driving shaft is fixedly connected with a first gear; The frame is provided with a sorting mechanism, which is used to sort good products and defective products according to the detection results.

[0006] Furthermore, the test assembly also includes a sliding sleeve, which is slidably connected to the rotating column, a plurality of sliders are fixedly connected to the side wall of the rotating column, the sliders are slidably connected to the sliding sleeve, a second spring is fixedly connected between the slider and the sliding sleeve, a conductive ring is fixedly connected to the lower surface of the rotating column and the inner bottom wall of the sliding sleeve, the conductive ring is electrically connected to the detection camera through a wire, and the sliding sleeve is rotatably connected to the base through a bearing.

[0007] Furthermore, the fill light assembly includes a plurality of lamp beads, the lamp beads are fixedly connected to the side wall of the rotating column, the side wall of the rotating column is fixedly connected to a plurality of lamp covers, the inner wall of the lifting plate is fixedly connected to a third electric block, the side wall of the curved tube is fixedly connected to a plurality of first electric blocks and one second electric block, and the first electric block, the second electric block, the third electric block and the lamp beads are electrically connected via wires.

[0008] Furthermore, the lifting assembly includes a pump plate, which is sealingly and slidingly connected in a fixed seat, a plurality of first springs are fixedly connected between the pump plate and the inner bottom wall of the fixed seat, a rack is fixedly connected to the lower surface of the pump plate, the rack is slidably connected to the fixed seat and the hood, the rack is meshed with a first gear, the fixed seat and the bent pipe are filled with hydraulic oil, the drive shaft is rotatably connected to the hood through a bearing, the hood side wall is fixedly connected to a servo motor through a bracket, and the drive shaft is fixedly connected to the output shaft of the servo motor.

[0009] Furthermore, the conveying assembly includes an installation shaft, which is rotatably connected to the inner wall of the hood via a bearing, the installation shaft is fixedly connected to a second gear and a main pulley, the second gear is meshed with the first gear, and the side wall of the frame is rotatably connected to two roller shafts through a bearing, one end of the roller shaft extends through the hood, and the other end extends through the frame and is fixedly connected to a belt roller, one end of one of the roller shafts located in the hood is fixedly connected to a secondary pulley, the main pulley and the secondary pulley are tensioned with a synchronous belt, and the two belt rollers are jointly tensioned with a conveyor belt.

[0010] Furthermore, the sorting mechanism includes a passing block with a cross-section that is a concave shape with an opening facing downward, the passing block is fixedly connected to the upper surface of the frame, a sliding groove is provided on the side wall of the passing block, the passing block is slidably connected to a baffle through the sliding groove, a permanent magnet is fixedly connected to the upper surface of the baffle, an electromagnet is fixedly connected to the top wall of the sliding groove, the electromagnet is connected to the detection camera through a PLC control circuit, a rolling plate is fixedly connected between the two opposite inner walls of the frame, and a defective product box is fixedly connected to the side wall of the frame.

[0011] Furthermore, the lifting plate is penetrated and fixedly connected with two limit sleeves, the limit sleeves are slidably connected with connecting rods, the rotating column is rotatably connected with a fixing ring through a bearing, and the connecting rod is fixedly connected to the upper surface of the fixing ring.

[0012] Furthermore, a plurality of guide rods are fixedly connected to the top wall of the sliding groove, and the guide rods are slidably connected to the baffle.

[0013] Furthermore, a protective sleeve is fixedly connected to the side wall of the curved pipe, and the protective sleeve is slidably connected to the lifting plate.

[0014] Furthermore, the conveyor belt is marked with a plurality of "cross" marks by paint, and a bottom plate is fixedly connected between two opposite inner side walls of the frame.

[0015] The present invention has the following advantages: 1. During the inspection process, the rotating column is lowered into the valve casting. The screw is inserted into the rotating column and the rotating column is rotated through the threaded connection. During the rotation of the rotating column, the inspection camera is driven to rotate to capture all angles of the casting to ensure that there are no blind spots in the inspection. Therefore, only one inspection camera is needed to complete the comprehensive scan, which reduces the equipment cost while ensuring the comprehensiveness of the inspection; 2. When the lifting plate descends and the screw is inserted into the rotating column, the third electric block will contact the first electric block and the second electric block in sequence, thereby generating lights of different colors for fill light. The detection camera performs detection and comparison under the conditions of fill light of different colors. Through the conditions of different colors of light, the defects on the surface of the casting can be more clearly highlighted, thereby improving the sensitivity of detection; 3. During the descent of the rotating column, when the rotating column extends into the casting and the base contacts the conveyor belt, the rotating column continues to descend, so that the two conductive rings are close to each other until the two conductive rings contact each other, and the detection camera starts to work. After the detection is completed, the rotating column rises, the two conductive rings separate, and the detection camera stops working. That is, the detection camera starts to work only when the rotating column completely enters the casting, and does not work at other times, avoiding long-term unnecessary work, making the equipment more energy-efficient, and at the same time increasing the service life of the camera; 4. The servo motor rotates to drive the first gear to rotate, and the first gear meshes with the rack and the second gear alternately. When meshing with the rack, the rotating column is lowered for detection. After the detection is completed, the rotating column leaves the casting, and the first gear meshes with the second gear to move the conveyor belt, sending the casting that has been tested away from the rotating column, and sending the next casting to be tested to the bottom of the rotating column, thereby completing automatic loading and unloading, reducing labor intensity, and improving detection efficiency; 5. Through the setting of the sorting mechanism, according to the test results, when the test is qualified, the electromagnet is not energized, and the casting can pass through the through block as it is transported; when the test is unqualified, the electromagnet is energized, and the baffle will block the through block. At this time, as the conveyor belt is transported, the casting will be transported along the baffle and the through block to the defective box, thereby automatically completing the sorting during the transportation process, greatly improving the degree of automation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a defect detection device for valve casting production proposed by the present invention; Figure 2 for Figure 1 A in the enlarged view; Figure 3 This is a schematic structural diagram of a defect detection device for valve casting production proposed by the present invention from another perspective; Figure 4 A schematic diagram of the internal structure of a hood in a defect detection device for valve casting production proposed by the present invention; Figure 5 for Figure 4 The enlarged view of point B in the figure; Figure 6 A schematic diagram of the internal structure of a defect detection device for valve casting production proposed by the present invention under a longitudinal section; Figure 7 for Figure 6 The enlarged view of point C in the figure; Figure 8 This is a schematic diagram of the internal structure of another longitudinal section of a defect detection device for valve casting production proposed by the present invention; Fig. 9 for Figure 8 The enlarged view of point D in the figure; Fig.10 for Figure 8 The enlarged view of point E in the figure; Fig.11 The present invention provides a schematic diagram of the circuit connection of a lamp bead in a defect detection device for valve casting production.

[0017] In the figure: 1, frame; 2, machine cover; 3, fixed seat; 4, elbow; 5, sliding column; 6, lifting plate; 7, screw; 8, rotating column; 9, detection camera; 10, lamp beads; 11, lamp cover; 12, first electric block; 13, second electric block; 14, third electric block; 15, protective cover; 16, servo motor; 17, drive shaft; 18, first gear; 19, pump plate; 20, first spring; 21, rack; 22, sliding sleeve; 23, slider; 24, second spring ; 25. Base; 26. Conductive ring; 27. Limit sleeve; 28. Connecting rod; 29. ​​Fixed ring; 30. Third spring; 31. Mounting shaft; 32. Second gear; 33. Main pulley; 34. Roller shaft; 35. Secondary pulley; 36. Synchronous belt; 37. Belt roller; 38. Conveyor belt; 39. Bottom plate; 40. Rolling plate; 41. Defective box; 42. Passing block; 43. Sliding groove; 44. Baffle; 45. Permanent magnet; 46. Electromagnet; 47. Guide rod. DETAILED DESCRIPTION

[0018] Reference Figure 1-Figure 11 , a defect detection device for valve casting production, comprising a frame 1 with an opening facing upward in a concave shape, a hood 2 fixedly connected to the side wall of the frame 1, a fixing seat 3 fixedly connected to the upper surface of the hood 2, and the fixing seat 3 is a hollow structure; The fixing seat 3 is provided with a detection mechanism, which is composed of a test component and a fill light component. The test component is used to detect defects, and the fill light component is used to provide illumination of different colors. The test component includes a curved pipe 4, which is fixedly connected to the top wall of the fixing seat 3 through the curved pipe 4, and the curved pipe 4 is sealed and slidably connected with a sliding column 5 (such as Figure 6 As shown in the figure), the lower surface of the sliding column 5 is fixedly connected with a lifting plate 6, the lower surface of the lifting plate 6 is fixedly connected with a screw 7, the screw 7 is threadedly connected with a rotating column 8, the thread lead angle of the screw 7 is greater than the equivalent friction angle of the screw pair formed by the screw 7 and the rotating column 8, so that the rotating column 8 can be rotated by the threaded connection during the insertion of the screw 7 into the rotating column 8, and the side wall of the rotating column 8 is fixedly connected with a detection camera 9; A driving mechanism is provided in the hood 2, and the driving mechanism is composed of a lifting assembly and a conveying assembly. The lifting assembly is used to drive the lifting and lowering of the lifting plate 6, and the conveying assembly is used to convey the product. The lifting assembly includes a driving shaft 17, and the driving shaft 17 is fixedly connected to a first gear 18. The first gear 18 is an incomplete gear (such as Figure 4 and Figure 5 shown); A sorting mechanism is provided on the rack 1, and the sorting mechanism is used to sort good products and defective products according to the detection results.

[0019] The test assembly also includes a sleeve 22, which is slidably connected to the rotating column 8. A plurality of sliders 23 are fixedly connected to the side wall of the rotating column 8. The sliders 23 are slidably connected to the sleeve 22. A second spring 24 (such as Fig. 9 As shown in the figure, the lower surface of the rotating column 8 and the inner bottom wall of the sliding sleeve 22 are fixedly connected with a conductive ring 26, and the conductive ring 26 is electrically connected to the detection camera 9 through a wire. After the two conductive rings 26 are in contact, the detection camera 9 can be powered on and started. The detection camera 9 is a 3D visual detection camera. The 3D visual technology can more accurately identify the three-dimensional defects on the surface of the casting, improve the accuracy and reliability of the detection, which is a prior art and will not be described in detail here. The rotating column 8 continues to descend with the lifting plate 6, which will cause the two conductive rings 26 to contact. At this time, the detection camera 9 is powered on and started. At this time, the lifting plate 6 continues to descend, which will cause the screw 7 to be inserted into the rotating column 8. During the insertion process, the rotating column 8 will be rotated through the threaded connection. The rotation of the rotating column 8 drives the detection camera 9 to rotate, and a full-scale scan of the inside of the casting is performed to ensure the comprehensiveness of the detection. At the same time, only one detection camera 9 is required to complete the comprehensive detection, which greatly reduces the cost of the equipment. The sliding sleeve 22 is rotatably connected to the base 25 through the bearing.

[0020] It is worth mentioning that, through the setting of the conductive ring 26, the detection camera 9 starts working only when the rotating column 8 completely enters the casting, and does not work at other times, avoiding unnecessary work for a long time, making the equipment more energy-efficient, and at the same time increasing the service life of the camera.

[0021] The fill light assembly includes a plurality of lamp beads 10, and each group of three lamp beads 10 is composed of a plurality of lamp beads 10. Fig. 9 As shown in FIG. 1 , the three lamp beads 10 in each group emit different colors of light, namely, red, green and blue. The lamp beads 10 are fixedly connected to the side wall of the rotating column 8, and a plurality of lampshades 11 are fixedly connected to the side wall of the rotating column 8. The inner wall of the lifting plate 6 is fixedly connected to the third electric block 14 (as shown in FIG. 1 ). Fig.10 As shown), the third electric block 14 is connected to the lifting plate 6 by insulating glue, a plurality of first electric blocks 12 and a second electric block 13 are fixedly connected to the side wall of the bent pipe 4, the first electric block 12 and the second electric block 13 are connected to the bent pipe 4 by insulating glue, and the distance between the second electric block 13 and the adjacent first electric block 12 is greater than the thickness of the third electric block 14, so as to avoid the third electric block 14 from contacting the first electric block 12 and the second electric block 13 at the same time, the first electric block 12, the second electric block 13, the third electric block 14, and the lamp bead 10 are electrically connected by wires, and the circuit connection of the first electric block 12, the second electric block 13, the third electric block 14, and the lamp bead 10 is as shown Fig.11As shown, in the process of the third electric block 14 descending with the lifting plate 6, it first contacts with the first first electric block 12, so that one of the lamp beads 10 lights up, and then contacts with the first first electric block 12 and the second first electric block 12 at the same time, so that the two lamp beads 10 emit light at the same time. The simultaneous emission of the two lamp beads 10 will be combined into a light source of another color, and then contact with the second first electric block 12 alone, so that the other lamp bead 10 lights up, and so on, until the third electric block 14 contacts with the second electric block 13. At this time, the three lamp beads 10 light up at the same time, forming a white light source, so that when the lifting plate 6 descends for detection, six light sources of different colors can be provided for fill light. Through the illumination conditions of different colors, the defects on the surface of the casting can be more clearly highlighted, thereby improving the sensitivity of detection.

[0022] The lifting assembly includes a pump plate 19, which is sealingly slidably connected in the fixing seat 3 (such as Figure 8 As shown, a small hole is opened on the bottom side wall of the fixing seat 3 (as shown Figure 5 As shown), by opening a small hole, the bottom of the pump plate 19 is in a state of communication with the outside world, thereby ensuring that the sealed sliding pump plate 19 can slide freely in the fixed seat 3, and a plurality of first springs 20 are fixedly connected between the pump plate 19 and the inner bottom wall of the fixed seat 3, and a rack 21 is fixedly connected to the lower surface of the pump plate 19, and the rack 21 is slidably connected with the fixed seat 3 and the hood 2, and the rack 21 is meshed with the first gear 18, and the fixed seat 3 and the bent pipe 4 are filled with hydraulic oil, and the contact area between the pump plate 19 and the hydraulic oil is larger than the contact area between the sliding column 5 and the hydraulic oil, so that the small-distance movement of the pump plate 19 can be amplified at the sliding column 5, thereby ensuring that the lifting plate 6 has sufficient stroke to complete the detection, the drive shaft 17 and the hood 2 are rotatably connected through the bearing, and the side wall of the hood 2 is fixedly connected with the servo motor 16 through a bracket, and the drive shaft 17 is fixedly connected to the output shaft of the servo motor 16.

[0023] The conveying assembly includes a mounting shaft 31, which is rotatably connected to the inner wall of the hood 2 through a bearing, and the mounting shaft 31 is fixedly connected to a second gear 32 and a main pulley 33. The second gear 32 is meshed with the first gear 18. After the first gear 18 is disengaged from the rack 21, it will be meshed with the second gear 32 after rotating a certain angle, thereby ensuring that the rotating column 8 has enough time to reset and avoid the rotating column 8 from interfering with the conveying of the casting. The side wall of the frame 1 is rotatably connected to two rollers 34 (such as Figure 6 As shown in FIG. 1 , one end of the roller shaft 34 extends through the hood 2, and the other end extends through the frame 1 and is fixedly connected to a belt roller 37. One end of the roller shaft 34 located in the hood 2 is fixedly connected to a secondary pulley 35 (as shown in FIG. 1 ). Figure 4As shown in the figure, the main pulley 33 and the secondary pulley 35 are tensioned with a synchronous belt 36, and the two belt rollers 37 are tensioned with a conveyor belt 38. The first gear 18 rotates and meshes with the second gear 32, and drives it to rotate. The rotation of the second gear 32 drives the main pulley 33 to rotate through the installation shaft 31, and the main pulley 33 drives the secondary pulley 35 to rotate through the synchronous belt 36. The secondary pulley 35 drives the belt roller 37 to rotate through the roller shaft 34, thereby moving the conveyor belt 38 to send the casting that has been inspected away from the bottom of the rotating column 8, and send the next casting to be inspected to the bottom of the rotating column 8. As the first gear 18 continues to rotate, it disengages from the meshing with the second gear 32, stops conveying, and then meshes with the rack 21 again to start detection, thereby completing automatic loading and unloading, greatly reducing labor intensity, and improving detection efficiency.

[0024] The sorting mechanism includes a through block 42 with a concave cross section, the through block 42 is fixedly connected to the upper surface of the frame 1, and there is an opening below the through block 42 (such as Figure 3 As shown in FIG. 1 ), the castings transported by the conveyor belt 38 can pass through the opening through the block 42, and the side wall of the block 42 is provided with a sliding groove 43 (as shown in FIG. Figure 7As shown), a baffle 44 is slidably connected to the baffle 44 through the sliding groove 43 by the block 42, and a permanent magnet 45 is fixedly connected to the upper surface of the baffle 44, and an electromagnet 46 is fixedly connected to the top wall of the sliding groove 43. The electromagnet 46 can generate a magnetic repulsion force on the permanent magnet 45 when it is energized. On the contrary, when the electromagnet 46 is in a power-off state, its essence is an iron core, and the permanent magnet 45 will generate a magnetic attraction force on it, thereby ensuring that the baffle 44 is in the sliding groove 43. The electromagnet 46 is connected to the detection camera 9 through a PLC control circuit. The PLC control circuit can control the power on and off of the electromagnet 46 according to the detection result of the detection camera 9. When the detection is qualified, the electromagnet 46 remains in the power-off state, and when the detection is unqualified, the electromagnet 46 is energized. A rolling plate 40 is fixedly connected between the two opposite inner side walls of the frame 1, and a defective box 41 is fixedly connected to the side wall of the frame 1. When the detection is completed, the control circuit controls the power on and off of the electromagnet 46 according to the detection result of the detection camera 9. 9, controls the on and off of the electromagnet 46. When the test result is qualified, the electromagnet 46 is in the off state. At this time, under the magnetic attraction of the permanent magnet 45 and the iron core of the electromagnet 46, the baffle 44 is located in the sliding groove 43. At this time, the casting will pass through the opening of the through block 42 and pass through the through block 42 as the conveyor belt 38 is conveyed, and will roll down along the rolling plate 40 as the conveyor belt 38 is conveyed. The casting rolling down on the rolling plate 40 is a qualified product. If the test is unqualified, the electromagnet 46 will be energized to generate a magnetic repulsion force on the permanent magnet 45, so that the permanent magnet 45 drives the baffle 44 to slide down and block the opening of the through block 42. At this time, when the conveyor belt 38 transports the casting, the casting will fall into the defective box 41 for storage along the baffle 44 and the side wall of the through block 42 as the conveyor belt 38 moves. Therefore, while unloading, qualified products and unqualified products are classified according to the test results.

[0025] The lifting plate 6 is fixedly connected with two limit sleeves 27, the limit sleeves 27 are slidably connected with a connecting rod 28, the rotating column 8 is rotatably connected with a fixing ring 29 through a bearing, and the connecting rod 28 is fixedly connected to the upper surface of the fixing ring 29. The setting of the limit sleeves 27 and the connecting rod 28 ensures the stable lifting of the rotating column 8.

[0026] A plurality of guide rods 47 are fixedly connected to the top wall of the sliding groove 43 , and the guide rods 47 are slidably connected to the baffle 44 . The baffle 44 is guided by the setting of the guide rods 47 so that it can only slide up and down along the sliding groove 43 .

[0027] A protective cover 15 is fixedly connected to the side wall of the curved pipe 4 , and the protective cover 15 is penetrated and slidably connected to the lifting plate 6 .

[0028] The conveyor belt 38 is marked with multiple "cross" marks through paint. Through the setting of the "cross" marks, the castings can be placed in order, thereby ensuring that the conveyor belt 38 can accurately deliver the castings to the bottom of the rotating column 8. A bottom plate 39 is fixedly connected between the two opposite inner walls of the frame 1. The setting of the bottom plate 39 ensures that after the base 25 contacts the conveyor belt 38, it can provide sufficient support for the base 25.

[0029] In the present invention, the casting to be inspected is placed according to the mark on the conveyor belt 38, and then the servo motor 16 is turned on. The servo motor 16 drives the drive shaft 17 to rotate, and the drive shaft 17 drives the first gear 18 to rotate. The first gear 18 rotates and engages with the rack 21, so that the rack 21 rises, and the rack 21 drives the pump plate 19 to rise. When the pump plate 19 rises, the hydraulic oil will be pumped into the bent pipe 4, so that the sliding column 5 slides to the outside of the bent pipe 4, thereby driving the rotating column 8 to descend and extend into the casting.

[0030] Until the base 25 contacts the conveyor belt 38, the rotating column 8 continues to descend with the lifting plate 6, which will make the two conductive rings 26 contact. At this time, the detection camera 9 is powered on and started. At this time, the lifting plate 6 continues to descend, which will make the screw 7 inserted into the rotating column 8. During the insertion process, the rotating column 8 will rotate through the threaded connection. At the same time, the third electric block 14 descends with the lifting plate 6 and contacts the first first electric block 12, so that the lamp beads 10 of the first color are lit for fill light. As the rotating column 8 rotates, the detection camera 9 rotates accordingly to perform a full-scale scan of the inside of the casting. After the detection camera 9 rotates one circle with the rotating column 8, the third electric block 14 descends to contact the first first electric block 12 and the second first electric block 12 at the same time. At this time, the lights of the two colors The beads 10 light up at the same time and combine into another light source for fill light. At this time, the detection camera 9 continues to rotate with the rotating column 8 and performs another scan under another color light source. After a round of scanning, the third electric block 14 drops to contact the second first electric block 12 alone. At this time, the second color lamp beads 10 light up alone to provide a third color light source. Similarly, the second color lamp beads 10 and the third color lamp beads 10 form a fourth color light source, and the third color lamp beads 10 provide a fifth color light source. After the third electric block 14 contacts the second electric block 13, the three colors of lamp beads 10 light up at the same time to provide a sixth color light source. The six color light sources are provided, combined with the scanning of the detection camera 9, the scanning results are compared to detect whether there are defects.

[0031] When the first gear 18 rotates to disengage from the rack 21, the detection is completed, and the pump plate 19 is reset under the elastic force of the first spring 20, so that the lifting plate 6 rises and resets, driving the rotating column 8 to rise and reset. While the rotating column 8 rises, under the elastic force of the second spring 24, the sliding sleeve 22 slides down relative to the rotating column 8, so that the two conductive rings 26 are separated. At this time, the detection camera 9 is powered off and stops working, and the rotating column 8 will also be reset under the elastic force of the third spring 30.

[0032] Then the first gear 18 rotates and meshes with the second gear 32, driving it to rotate. The rotation of the second gear 32 drives the main pulley 33 to rotate through the mounting shaft 31. The main pulley 33 drives the secondary pulley 35 to rotate through the synchronous belt 36. The secondary pulley 35 drives the belt roller 37 to rotate through the roller shaft 34, thereby causing the conveyor belt 38 to move, and the casting that has been inspected is sent away from under the rotating column 8, and the next casting to be inspected is sent to under the rotating column 8. As the first gear 18 continues to rotate, it disengages from the meshing with the second gear 32, stops conveying, and then meshes with the rack 21 again to start inspection.

[0033] When the detection is completed, the control circuit controls the on and off of the electromagnet 46 according to the detection result of the detection camera 9. When the detection result is qualified, the electromagnet 46 is in a power-off state. At this time, under the magnetic attraction of the permanent magnet 45 and the iron core of the electromagnet 46, the baffle 44 is located in the sliding groove 43. At this time, the casting will pass through the opening of the through block 42 and pass through the through block 42 as the conveyor belt 38 is conveyed, and will roll down along the rolling plate 40 as the conveyor belt 38 is conveyed. The casting that rolls down on the rolling plate 40 is a qualified product.

[0034] If the test fails, the electromagnet 46 will be energized to generate a magnetic repulsion force on the permanent magnet 45, so that the permanent magnet 45 drives the baffle 44 to slide down and block the opening of the block 42. At this time, when the conveyor belt 38 transports the casting, the casting will fall into the defective box 41 for storage along the baffle 44 and the side wall of the block 42 as the conveyor belt 38 moves.

Claims

1. A defect detection device for valve casting production, comprising a frame (1) having a concave cross-section with an opening facing upward, characterized in that: The side wall of the frame (1) is fixedly connected to a cover (2), the upper surface of the cover (2) is fixedly connected to a fixing seat (3), and the fixing seat (3) is a hollow structure; The fixing seat (3) is provided with a detection mechanism, the detection mechanism is composed of a test component and a fill light component, the test component is used to detect defects, the fill light component is used to provide illumination of different colors, the test component comprises a bent pipe (4), the bent pipe (4) is fixedly connected to the top wall of the fixing seat (3), the bent pipe (4) is sealed and slidably connected to a sliding column (5), the lower surface of the sliding column (5) is fixedly connected to a lifting plate (6), the lower surface of the lifting plate (6) is fixedly connected to a screw (7), the screw (7) is threadedly connected to a rotating column (8), and the side wall of the rotating column (8) is fixedly connected to a detection camera (9); A driving mechanism is arranged in the hood (2), the driving mechanism comprising a lifting assembly and a conveying assembly, the lifting assembly is used to drive the lifting of the lifting plate (6), the conveying assembly is used to convey the product, the lifting assembly comprises a driving shaft (17), and the driving shaft (17) is fixedly connected to a first gear (18); The frame (1) is provided with a sorting mechanism, which is used to sort good products and defective products according to the detection results.

2. A defect detection device for valve casting production according to claim 1, characterized in that: The test assembly further comprises a sliding sleeve (22), wherein the sliding sleeve (22) is slidably sleeved with the rotating column (8), a plurality of sliding blocks (23) are fixedly connected to the side wall of the rotating column (8), the sliding blocks (23) are slidably connected to the sliding sleeve (22), a second spring (24) is fixedly connected between the sliding blocks (23) and the sliding sleeve (22), a conductive ring (26) is fixedly connected to the lower surface of the rotating column (8) and the inner bottom wall of the sliding sleeve (22), the conductive ring (26) is electrically connected to the detection camera (9) via a wire, and the sliding sleeve (22) is rotatably connected to a base (25) via a bearing.

3. A defect detection device for valve casting production according to claim 1, characterized in that: The fill light assembly comprises a plurality of lamp beads (10), the lamp beads (10) being fixedly connected to the side wall of a rotating column (8), the side wall of the rotating column (8) being fixedly connected to a plurality of lampshades (11), the inner side wall of the lifting plate (6) being fixedly connected to a third electric block (14), the side wall of the curved pipe (4) being fixedly connected to a plurality of first electric blocks (12) and a second electric block (13), the first electric block (12), the second electric block (13), the third electric block (14), and the lamp beads (10) being electrically connected via a wire.

4. A defect detection device for valve casting production according to claim 1, characterized in that: The lifting assembly comprises a pump plate (19), the pump plate (19) is sealingly slidably connected in the fixed seat (3), a plurality of first springs (20) are fixedly connected between the pump plate (19) and the inner bottom wall of the fixed seat (3), a rack (21) is fixedly connected to the lower surface of the pump plate (19), the rack (21) is slidably connected to the fixed seat (3) and the hood (2), the rack (21) is meshed with a first gear (18), the fixed seat (3) and the bent pipe (4) are filled with hydraulic oil, the drive shaft (17) is rotatably connected to the hood (2) through a bearing, the side wall of the hood (2) is fixedly connected to a servo motor (16) through a bracket, and the drive shaft (17) is fixedly connected to an output shaft of the servo motor (16).

5. A defect detection device for valve casting production according to claim 1, characterized in that: The conveying assembly comprises a mounting shaft (31), the mounting shaft (31) being rotatably connected to the inner side wall of the hood (2) via a bearing, the mounting shaft (31) being fixedly connected to a second gear (32) and a main pulley (33), the second gear (32) being meshed with the first gear (18), the side wall of the frame (1) being rotatably connected to two roller shafts (34) via a bearing, one end of the roller shaft (34) extending through the hood (2), and the other end extending through the hood (1) and fixedly connected to a belt roller (37), one end of one of the roller shafts (34) located in the hood (2) being fixedly connected to a secondary pulley (35), the main pulley (33) and the secondary pulley (35) being tensioned with a synchronous belt (36), and the two belt rollers (37) being tensioned with a conveyor belt (38) together.

6. A defect detection device for valve casting production according to claim 1, characterized in that: The sorting mechanism comprises a passing block (42) having a cross section in the shape of a concave character with an opening facing downward, the passing block (42) being fixedly connected to the upper surface of the frame (1), a sliding groove (43) being provided on the side wall of the passing block (42), a baffle (44) being slidably connected to the passing block (42) through the sliding groove (43), a permanent magnet (45) being fixedly connected to the upper surface of the baffle (44), an electromagnet (46) being fixedly connected to the inner top wall of the sliding groove (43), the electromagnet (46) being connected to a detection camera (9) via a PLC control circuit, a rolling plate (40) being fixedly connected between two opposite inner side walls of the frame (1), and a defective product box (41) being fixedly connected to the side wall of the frame (1).

7. A defect detection device for valve casting production according to claim 1, characterized in that: The lifting plate (6) is penetrated and fixedly connected with two limit sleeves (27), the limit sleeves (27) are slidably connected with a connecting rod (28), the rotating column (8) is rotatably connected with a fixing ring (29) via a bearing, and the connecting rod (28) is fixedly connected to the upper surface of the fixing ring (29).

8. A defect detection device for valve casting production according to claim 6, characterized in that: A plurality of guide rods (47) are fixedly connected to the inner top wall of the sliding groove (43), and the guide rods (47) are slidably connected to the baffle plate (44).

9. A defect detection device for valve casting production according to claim 3, characterized in that: A protective sleeve (15) is fixedly connected to the side wall of the curved pipe (4), and the protective sleeve (15) is slidably connected to the lifting plate (6).

10. A defect detection device for valve casting production according to claim 5, characterized in that: The conveyor belt (38) is marked with a plurality of cross marks by means of paint, and a bottom plate (39) is fixedly connected between two opposite inner side walls of the frame (1).

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