Drilling and polishing combined device and method for nodular cast iron jacking pipe

Abstract

The invention discloses a drilling and polishing combined device and method for a nodular cast iron jacking pipe, and relates to the technical field of machining equipment. The drilling and polishing combined device and method for the nodular cast iron jacking pipes comprise two sets of jacking pipe supporting mechanisms which are symmetrically arranged and support the nodular cast iron jacking pipes respectively; the drilling assembly is driven by a linear guide rail to move to the bottom of the nodular cast iron jacking pipe; the hole grinding assembly is used for grinding the nodular cast iron jacking pipes on the two sides by switching directions; drilling and grinding are carried out at the same time, a tool bit does not need to be replaced, the jacking pipe does not need to be driven to rotate by two circles for drilling and grinding, efficiency is high, overturning driving force of the supporting assembly is saved, the two stations share one set of drilling and hole grinding device, the hole grinding mechanism is different from a horizontal moving mode of the drilling assembly, a steering mode is adopted, switching is fast, and efficiency is high. And the steering power of the hole grinding mechanism is controlled in a linkage mode in the translation process of the drilling assembly, and automatic switching is achieved.

Description

Technical Field

[0001] This invention relates to the field of machining equipment technology, specifically to a drilling and grinding assembly and method for ductile iron jacking pipes. Background Technology

[0002] Ductile iron jacking pipe is a type of pipe made of ductile iron and laid using a jacking construction process. It has advantages such as high strength, corrosion resistance, and leak prevention. The drilling of its grouting holes usually utilizes a special device to support the pipe and monitors the position using laser ranging. Drilling is carried out in a safe area at the bottom of the pipe to eliminate the risks of manual drilling and achieve efficient and precise processing.

[0003] Publication No. CN116175180A discloses a drilling device for grouting holes in ductile iron jacking pipes, comprising: a spigot support assembly supporting the spigot side of the ductile iron jacking pipe; a socket support assembly supporting the socket side of the ductile iron jacking pipe and, together with the spigot support assembly, supporting the ductile iron jacking pipe, ensuring a gap between the ductile iron jacking pipe and the ground when the grouting hole is being made; a drilling assembly located between the spigot support assembly and the socket support assembly, and positioned below the axis of the ductile iron jacking pipe when the grouting hole is to be made; and a spacing adjustment device, with its two ends connected to the spigot support assembly and the socket support assembly respectively, adjusting the spacing between the spigot support assembly and the socket support assembly. This invention utilizes the self-weight of the ductile iron jacking pipe, eliminating the risks of manual drilling by drilling from the bottom. The position of the spigot support assembly and the socket support assembly is monitored by a laser ranging assembly, enabling control of the drilling device for pipes of different lengths.

[0004] As shown in the above technology, the existing drilling equipment for grouting holes in ductile iron jacking pipes generally involves supporting the jacking pipe and drilling at the bottom. After drilling, the hole is usually not smooth enough and requires grinding. This process needs to be done separately. Typically, after drilling, the drill bit is replaced with a grinding head, and the heavy jacking pipe is rotated once for grinding. This is inefficient and consumes a lot of power. Furthermore, after processing one jacking pipe, it needs to be hoisted away and replaced with a new one, which further reduces efficiency. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a drilling and grinding assembly and method for ductile iron jacking pipes, which solves the problem of low processing efficiency in existing technologies.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a drilling and grinding assembly for ductile iron jacking pipes, comprising: The jacking pipe support mechanism is symmetrically arranged in two sets, each supporting a ductile iron jacking pipe. The jacking pipe support mechanism includes a base plate and support components installed at both ends of its top. The support components support and drive the ductile iron jacking pipe to rotate at a specified angle, and the support components release pressure through elastic expansion and contraction. Linear guide rails are installed on the bottom surface between two sets of base plates and do not contact the base plates; The drilling assembly is mounted on the top of the linear guide rail and is driven by the linear guide rail to move to the bottom of the ductile iron jacking pipe. A grinding assembly is installed on the bottom surface between two sets of base plates. The grinding assembly can grind the ductile iron top pipes on both sides by switching their orientation. The grinding assembly includes a stand, which is mounted on the outside of a linear guide rail. A grinding mechanism is rotatably connected to the top of the stand. A linkage mechanism is installed on the inside of the stand. The linkage mechanism uses the thrust of the drilling assembly during lateral movement to drive the grinding mechanism to turn. Electromagnetic locks that lock the angle of the grinding mechanism after rotation are installed at both ends of the top inside of the stand.

[0007] Preferably, the linkage mechanism includes a T-shaped plate fixedly connected to one side of the inner wall of the frame. A semi-circular gear is rotatably connected to the top of the T-shaped plate via a drive column. A guide limiting strip is fixedly connected to the right end of the top of the T-shaped plate. A rack is slidably connected to the outside of the guide limiting strip, and the rack meshes with the semi-circular gear. A long shaft is rotatably connected to the inner center of the frame. A main gear is fixedly connected to both the long shaft and the drive column. A secondary gear that meshes with the two main gears is also fixedly connected to the inside of the frame. The top end of the long shaft is fixedly connected to the bottom of the grinding mechanism. The bottom of the rack is provided with a sliding groove and a damping groove. The sliding groove is slidably connected to the guide limit strip. Both sides of the inner wall of the damping groove are embedded with adhesive pads. The linkage mechanism also includes a push bar that is fixedly connected to the top of the drilling assembly by bolts. When the push bar moves laterally, it passes through the damping groove, and the push bar rubs against the damping groove through several protrusions on both sides to generate damping and push the rack to move.

[0008] Preferably, the semi-circular gear is half gear and half rectangular column. When the semi-circular gear rotates 180° in both directions to the extreme positions in both directions, the straight edge of the rectangular column fits into the rack and stops rotating. A limit frame is fixedly connected to the top of the rack. The limit frame is sleeved on the outside of the drive column. Both ends of the top of the guide limit strip are convex to limit the sliding distance of the rack.

[0009] Preferably, the grinding mechanism includes a sleeve whose bottom is fixedly connected to the top of a long shaft. A second motor housing is axially slidably connected inside the sleeve. A second drive motor is fixedly connected inside the second motor housing, and a grinding head is mounted on the drive shaft of the second drive motor. A push block penetrating the top of the sleeve is connected to the top of the second motor housing. A second push cylinder is fixedly connected to the top of the sleeve, and the output end of the second push cylinder is fixedly connected to the push block to push and pull the second motor housing to slide. A guide groove adapted to the push block is also provided on the top of the sleeve. A positioning hole for inserting an electromagnetic lock is provided at the bottom of the sleeve and the end extending away from the second motor housing.

[0010] Preferably, the electromagnetic lock includes a lock housing, inside which a locking pin is slidably connected via a spring, and an electromagnet is fixedly connected through the top of the lock housing. The electromagnet retracts the locking pin by attracting it through electromagnetic induction.

[0011] Preferably, the drilling assembly includes a chassis and a housing fixedly connected to its top by bolts. Multiple sets of first push cylinders and guide rods are intermittently fixedly connected to the outer side of the top of the chassis. A first motor housing is also provided on the top of the chassis. A push block and a guide block are fixedly connected to the periphery of the first motor housing. The top of the first push cylinder is fixedly connected to the push block. The guide block is slidably sleeved on the outside of the guide rod. An insertion hole adapted to the top of the guide rod is opened on the top of the inner wall of the housing to position the top of the guide rod. A first drive motor is fixedly connected inside the housing, and a drill bit is installed on the drive shaft of the first drive motor. A limiting sleeve sleeved on the outside of the first push cylinder is fixedly connected to the inner wall of the housing.

[0012] Preferably, the linear guide rail includes a base and a track fixedly connected to its top. A lead screw is rotatably connected to the top of the base, and a second servo motor that drives the lead screw to rotate is fixedly connected to one end of the base. Multiple threaded sleeves and a slider are fixedly connected to the bottom of the chassis. The threaded sleeves are slidably fitted on the track, and the slider is threadedly fitted outside the lead screw.

[0013] Preferably, the device further includes a chip collection assembly, which includes a hollow tube frame fixedly connected to the top of the base plate and located on one side of the drilling assembly. The top of the hollow tube frame is fixedly connected to a chip collection hood, which has a bowl-shaped structure and openings on the bottom and sides of the chip collection hood for the drill bit to pass through. The chip collection assembly also includes a vacuum cleaner installed on the ground on one side of the stand, and the air inlet of the vacuum cleaner is connected to the hollow tube frame through a vacuum pipe.

[0014] Preferably, the support assembly includes a bracket, with support wheels rotatably connected to both ends of the top of the bracket, a first servo motor fixedly connected inside the bracket, a drive pulley fixedly connected to the output end of the first servo motor, a driven pulley fixedly connected to one end of the support wheel, and multiple reversing pulleys rotatably connected to the side of the bracket. A gear belt drives the drive pulley, driven pulley, and reversing pulleys together. The support assembly also includes a support base fixedly connected to the top corner of the base plate, and the bottom of the bracket is slidably connected to the inside of the support base. A damping spring telescopic tube is fixedly connected to the top of the base plate and located inside the support base, and the top of the damping spring telescopic tube abuts against the bracket. The support assembly is also fixedly connected to the support column on the top right side of the base plate, and the top of the support column is rotatably fitted with a limiting wheel.

[0015] This invention also discloses a method for using a drilling and grinding assembly for ductile iron jacking pipes, specifically including the following steps: S1. First, hoist the ductile iron jacking pipe onto the two sets of jacking pipe support mechanisms, start the linear guide rail to drive the drilling assembly to move to the bottom of the ductile iron jacking pipe on one side, and then start the drilling assembly to drill upwards into the ductile iron jacking pipe. S2. After drilling a hole on the outer arc surface of the ductile iron jacking pipe, control the support assembly to drive the ductile iron jacking pipe to rotate 90°, and then control the drilling assembly to drill the next hole. S3. Start the grinding assembly to grind the holes drilled on the ductile iron jacking pipe; S4. After drilling and grinding all the holes, start the linear guide to move the drilling assembly to the bottom of the ductile iron jacking pipe on the other side. At the same time, during the movement, the drilling assembly pushes the linkage mechanism and drives the grinding mechanism to rotate 180°, so that the grinding mechanism faces the ductile iron jacking pipe on the other side. Then continue the drilling and grinding work on the ductile iron jacking pipe on the other side. Then lift the previous ductile iron jacking pipe away and replace it with a new ductile iron jacking pipe.

[0016] This invention provides a combined apparatus and method for drilling and grinding ductile iron jacking pipes. Compared with the prior art, it has the following advantages: 1. This drilling and grinding assembly and method for ductile iron jacking pipes, by setting up a dual-station configuration, allows two ductile iron jacking pipes to be placed simultaneously for sequential processing. While processing one ductile iron jacking pipe, the other jacking pipe can be switched, achieving continuous processing and improving work efficiency. Furthermore, the simultaneous drilling and grinding devices can produce smooth and qualified grouting holes. Drilling and grinding are performed concurrently without changing the cutting head or driving the jacking pipe to rotate twice for drilling and grinding separately, resulting in high efficiency and saving the rotation drive force of the support components. Both stations share a single drilling and grinding assembly. The grinding mechanism, unlike the translational method of the drilling assembly, uses a steering mechanism for rapid switching. The steering power of the grinding mechanism utilizes the linkage control during the translational process of the drilling assembly, achieving automatic switching without the need for an additional power drive source. This also avoids the problem of poor coordination between two independent power systems. Combined with the angle limiting function of the linkage mechanism itself, synchronization and accuracy are guaranteed.

[0017] 2. The drilling and grinding assembly and method for ductile iron jacking pipes uses a telescopic grinding mechanism for push-in grinding. After retraction, the sleeve can protect the grinding head from being damaged by the lowered jacking pipe. The bottom electromagnetic lock can quickly lock the grinding mechanism after turning, ensuring its accurate position and preventing deflection of the grinding mechanism during grinding, thus ensuring grinding accuracy. The electromagnetic lock control is simple and convenient.

[0018] 3. The drilling and grinding assembly and method for ductile iron jacking pipes adopts a bottom-up drilling method, which is convenient for workers to observe and adjust. The drilling assembly is supported by the gravity of the jacking pipe and the ground and linear guide rails, making the drilling relatively stable. The linear guide rails can drive the drilling assembly to move back and forth between two workstations, realizing continuous work and high work efficiency.

[0019] 4. The drilling and grinding assembly and method for ductile iron jacking pipes, by setting up a chip suction component, can directly cover the drilling position and use negative pressure to suck away and collect the chips generated during drilling. This avoids the chips falling into the drilling assembly and being difficult to clean, or even falling onto the linear guide rail and affecting the normal operation of the lead screw. Collecting the chips also facilitates the subsequent recycling and reuse of cast iron chips. The chip collection cover is located outside the drill bit, and the airflow generated during negative pressure adsorption also helps to dissipate heat from the drill bit, reducing the damage rate of the drill bit.

[0020] 5. The drilling and grinding assembly and method for ductile iron jacking pipes uses a support component to support the jacking pipe. The support component has the functions of supporting and raising the jacking pipe, providing elastic buffering, and rolling and turning. While raising the jacking pipe, it also achieves positioning, which facilitates drilling at the bottom. The elastic buffering function can prevent the support component from being crushed when the heavy jacking pipe is lowered. The support wheel is driven to rotate by the first servo motor, which can realize the rotation of the jacking pipe and realize multi-point drilling in the circumferential direction. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the working state of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the structure of the grinding assembly of the present invention; Figure 4 This is a schematic diagram of the linkage mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of the semi-circular gear, rack, and push bar of the present invention; Figure 6 This is a schematic diagram of the grinding mechanism of the present invention; Figure 7 This is a schematic diagram of the electromagnetic lock of the present invention; Figure 8 This is a partial structural schematic diagram of the linear guide rail of the present invention; Figure 9 This is a schematic diagram of the drilling assembly of the present invention; Figure 10 This is a cross-sectional schematic diagram of the housing of the present invention; Figure 11 This is a bottom view of the drilling assembly of the present invention; Figure 12 This is a schematic diagram of the structure of the dust collection component of the present invention; Figure 13 This is a schematic diagram of the structure of the support component of the present invention.

[0022] In the diagram: 1 - base plate; 2-Support assembly, 21-Bracket, 22-Support wheel, 23-First servo motor, 24-Driving pulley, 25-Driven pulley, 26-Directional wheel, 27-Gear belt, 28-Support base, 29-Damping spring telescopic tube, 210-Support column, 211-Limit wheel; 3-Linear guide rail, 31-Base, 32-Rail, 33-Lead screw, 34-Second servo motor, 35-Threaded sleeve, 36-Slider; 4-Drilling assembly, 41-Chassis, 42-Housing, 43-First push cylinder, 44-Guide rod, 45-First motor housing, 46-Push block, 47-Guide block, 48-First drive motor, 49-Drill bit, 410-Limit sleeve; 5-Grinding assembly, 51-Standing frame, 52-Grinding mechanism, 521-Sleeve, 522-Second motor box, 523-Second drive motor, 524-Grinding head, 525-Push block, 526-Second push cylinder, 527-Guide groove, 528-Positioning hole, 53-Linkage mechanism, 531-T-shaped plate, 532-Drive column, 533-Half-circular gear, 534-Guide limit bar, 535-Rack, 5351-Slide groove, 5352-Damping groove, 5353-Rubber pad, 536-Limiting frame, 537-Push bar, 5371-Protrusion, 538-Long shaft, 539-Main gear, 5310-Secondary gear, 54-Electromagnetic lock, 541-Lock housing, 542-Locking pin, 543-Electromagnet; 6-Dust collection assembly, 61-Hollow tube frame, 62-Dust collection hood, 63-Vacuum cleaner, 64-Dust collection pipe. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] See Figures 1-13 This invention discloses a drilling and grinding assembly for ductile iron jacking pipes and provides the following five technical solutions: First implementation method: includes: The jacking pipe support mechanism is symmetrically arranged in two sets, each supporting a ductile iron jacking pipe. The jacking pipe support mechanism includes a base plate 1 and support components 2 installed at both ends of its top. The support components 2 support and drive the ductile iron jacking pipe to rotate at a specified angle, and the support components 2 release pressure through elastic expansion and contraction. Linear guide rail 3 is installed on the bottom surface between the two sets of base plates 1 and does not contact the base plates 1; Drilling assembly 4 is installed on the top of linear guide rail 3 and is driven by linear guide rail 3 to move to the bottom of ductile iron jacking pipe. The grinding assembly 5 is installed on the bottom surface between the two sets of base plates 1. The grinding assembly 5 can grind the ductile iron jacking pipes on both sides by switching the orientation. The grinding assembly 5 includes a stand 51, which is mounted on the outside of the linear guide rail 3. The top of the stand 51 is rotatably connected to the grinding mechanism 52. The inner side of the stand 51 is equipped with a linkage mechanism 53. The linkage mechanism 53 uses the thrust of the drilling assembly 4 during the lateral movement to drive the grinding mechanism 52 to turn. Both ends of the inner top of the stand 51 are equipped with electromagnetic locks 54 to lock the angle of the grinding mechanism 52 after rotation.

[0025] The linkage mechanism 53 includes a T-shaped plate 531 fixedly connected to one side of the inner wall of the upright 51. A semi-circular gear 533 is rotatably connected to the top of the T-shaped plate 531 via a drive column 532. A guide limiting strip 534 is fixedly connected to the right end of the top of the T-shaped plate 531. A rack 535 is slidably connected to the outside of the guide limiting strip 534, and the rack 535 meshes with the semi-circular gear 533. A long shaft 538 is rotatably connected longitudinally to the inner center of the upright 51, and main gears 539 are fixedly connected to both the long shaft 538 and the drive column 532. Inside the upright 51, there are also fixedly connected gears that mesh with the two main gears 539 respectively. The top of the secondary gear 5310 and the long shaft 538 are fixedly connected to the bottom of the grinding mechanism 52; the bottom of the rack 535 is provided with a sliding groove 5351 and a damping groove 5352. The sliding groove 5351 is slidably connected to the guide limit strip 534. Both sides of the inner wall of the damping groove 5352 are embedded with rubber pads 5353. The linkage mechanism 53 also includes a pusher 537 fixedly connected to the top of the drilling assembly 4 by bolts. When the pusher 537 moves laterally, it passes through the damping groove 5352. The pusher 537 rubs against the damping groove 5352 through several protrusions 5371 on both sides to generate damping and push the rack 535 to move. The semi-circular gear 533 is half gear and half rectangular column. When the semi-circular gear 533 rotates 180° in both directions to the extreme position in both directions, the straight edge of the rectangular column fits against the rack 535 and stops rotating. The top of the rack 535 is fixedly connected to the limit frame 536. The limit frame 536 is sleeved on the outside of the drive column 532. The top two ends of the guide limit strip 534 are both convex to limit the sliding distance of the rack 535.

[0026] The pipe jacking support mechanism, linear guide rail 3, and grinding assembly 5 are installed on the ground and are in complementary contact to avoid mutual interference during vibration.

[0027] By setting up a dual-station configuration, two ductile iron jacking pipes can be placed simultaneously and processed sequentially. While processing one ductile iron jacking pipe, the other ductile iron jacking pipe can be switched at the same time, achieving continuous processing and improving work efficiency. Furthermore, the simultaneous installation of drilling and grinding devices allows for the production of smooth and qualified grouting holes. Drilling and grinding can be performed concurrently without changing the cutting head or driving the jacking pipe to rotate twice for drilling and grinding separately, resulting in high efficiency and saving the rotation drive force of support component 2. Both stations share a single set of drilling and grinding devices. The grinding mechanism 52 differs from the translational method of drilling component 4 by using a steering method, allowing for rapid switching. The steering power of the grinding mechanism 52 utilizes the linkage control during the translational process of drilling component 4, achieving automatic switching without the need for an additional power drive source. This also avoids the problem of poor coordination between two independent power systems. Combined with the angle limiting function of the linkage mechanism 53, synchronization and accuracy are guaranteed.

[0028] The second embodiment differs from the first embodiment in that: the grinding mechanism 52 includes a sleeve 521 whose bottom is fixedly connected to the top of the long shaft 538; a second motor housing 522 is axially slidably connected inside the sleeve 521; a second drive motor 523 is fixedly connected inside the second motor housing 522; a grinding head 524 is mounted on the drive shaft of the second drive motor 523; a push block 525 penetrating the top of the sleeve 521 is connected to the top of the second motor housing 522; a second push cylinder 526 is fixedly connected to the top of the sleeve 521; and the output end of the second push cylinder 526 is fixedly connected to the push block 525 to push and pull the second motor housing 522 to slide. A guide groove 527 adapted to the push block 525 is also provided on the top of the sleeve 521; and a positioning hole 528 for the electromagnetic lock 54 to be inserted is provided at the bottom of the sleeve 521 and at the end extending away from the second motor housing 522.

[0029] The electromagnetic lock 54 includes a lock housing 541, inside which a locking pin 542 is slidably connected via a spring, and an electromagnet 543 is fixedly connected through the top of the lock housing 541. The electromagnet 543 attracts the locking pin 542 by electromagnetic induction to retract the locking pin 542.

[0030] The grinding mechanism 52 uses a telescopic method for push-in grinding. After retraction, the sleeve 521 can also protect the grinding head 524 from being damaged by the lowered top tube. With the bottom electromagnetic lock 54, the grinding mechanism 52 after turning can be quickly locked to ensure its position accuracy and prevent the grinding mechanism 52 from deflecting during the grinding process, thus ensuring grinding accuracy. Moreover, the electromagnetic lock 54 is simple and convenient to control.

[0031] The third embodiment differs from the first embodiment in that: the drilling assembly 4 includes a chassis 41 and a housing 42 fixedly connected to its top by bolts. Multiple sets of first push cylinders 43 and guide rods 44 are intermittently fixedly connected to the outer side of the top of the chassis 41. The top of the chassis 41 is also provided with a first motor housing 45. Push blocks 46 and guide blocks 47 are fixedly connected to the periphery of the first motor housing 45. The top of the first push cylinder 43 is fixedly connected to the push block 46. The guide block 47 is slidably sleeved on the outside of the guide rod 44. The top of the inner wall of the housing 42 is provided with an insertion hole adapted to the top of the guide rod 44 to position the top of the guide rod 44. A first drive motor 48 is fixedly connected inside the housing 42, and a drill bit 49 is installed on the drive shaft of the first drive motor 48. A limiting sleeve 410 sleeved on the outside of the first push cylinder 43 is fixedly connected to the inner wall of the housing 42.

[0032] The linear guide 3 includes a base 31 and a track 32 fixedly connected to its top. A lead screw 33 is rotatably connected to the top of the base 31, and a second servo motor 34 that drives the lead screw 33 to rotate is fixedly connected to one end of the base 31. A plurality of threaded sleeves 35 and a slider 36 are fixedly connected to the bottom of the chassis 41. The threaded sleeves 35 are slidably sleeved on the track 32, and the slider 36 is threadedly sleeved on the lead screw 33.

[0033] The drilling assembly 4 adopts a bottom-up drilling method, which makes it easy for workers to observe and adjust. The drilling assembly 4 is supported by the gravity of the jacking pipe, the ground, and the linear guide rail 3, making the drilling relatively stable. The linear guide rail 3 can drive the drilling assembly 4 to move back and forth between two workstations, realizing continuous work and high work efficiency.

[0034] The fourth embodiment differs from the first embodiment in that the device further includes a chip collection assembly 6. The chip collection assembly 6 includes a hollow tube frame 61 fixedly connected to the top of the base plate 1 and located on one side of the drilling assembly 4. A chip collection cover 62 is fixedly connected to the top of the hollow tube frame 61. The chip collection cover 62 has a bowl-shaped structure, and the bottom and sides of the chip collection cover 62 have openings for the drill bit 49 to pass through. The chip collection assembly 6 also includes a vacuum cleaner 63 installed on the ground on one side of the stand 51. The air inlet of the vacuum cleaner 63 is connected to the hollow tube frame 61 through a vacuum pipe 64.

[0035] By setting up the chip suction component 6, the drilling position can be directly covered, and the chips generated by drilling can be sucked away and collected by negative pressure. This avoids the chips falling into the drilling component 4, which is difficult to clean, or even falling onto the linear guide rail 3 and affecting the normal operation of the lead screw 33. Collecting the chips also facilitates the subsequent recycling and reuse of the cast iron chips. The chip collection cover 62 is located on the periphery of the drill bit 49. The airflow generated during negative pressure suction also helps to dissipate heat from the drill bit 49, reducing the damage rate of the drill bit 49.

[0036] The fifth embodiment differs from the first embodiment in that: the support assembly 2 includes a bracket 21, with support wheels 22 rotatably connected to both ends of the top of the bracket 21, a first servo motor 23 fixedly connected inside the bracket 21, a drive pulley 24 fixedly connected to the output end of the first servo motor 23, a driven pulley 25 fixedly connected to one end of the support wheel 22, and multiple reversing pulleys 26 rotatably connected to the side of the bracket 21. A gear belt 27 is used to drive the drive pulley 24, driven pulley 25, and reversing pulley 26. The support assembly 2 also includes a support base 28 fixedly connected to the top corner of the base plate 1, and the bottom of the bracket 21 is slidably connected to the inside of the support base 28. A damping spring telescopic tube 29 is fixedly connected to the top of the base plate 1 and located inside the support base 28, and the top of the damping spring telescopic tube 29 abuts against the bracket 21. The support component 2 is also fixedly connected to the support column 210 on the top right side of the base plate 1, and the top of the support column 210 is rotatably fitted with a limiting wheel 211. The support column 210 and the limiting wheel 211 can be used to hold the end of the jacking pipe to achieve the positioning effect, and the limiting wheel 211 does not affect the rotation of the jacking pipe.

[0037] The jacking pipe is supported by a support component 2, which has the functions of supporting the jacking pipe, providing elastic cushioning, and rolling and flipping. While raising the jacking pipe, it also achieves positioning, which facilitates drilling at the bottom. The elastic cushioning function can prevent the support component 2 from being crushed when the heavy jacking pipe is lowered. The support wheel 22 is driven to rotate by the first servo motor 23, which can realize the rotation of the jacking pipe and realize multi-point drilling in the circumferential direction.

[0038] All electrical equipment is controlled automatically or manually via an external control host using a pre-set program, which is a conventional control technology.

[0039] This invention also discloses a method for using a drilling and grinding assembly for ductile iron jacking pipes, specifically including the following steps: S1. First, the ductile iron jacking pipe is hoisted onto the support components 2 of the two sets of jacking pipe support mechanisms. The second servo motor 34 of the linear guide rail 3 is started to drive the lead screw 33 to rotate. Then, the threaded sleeve 35 is used to drive the drilling assembly 4 to move to the bottom of the ductile iron jacking pipe on one side. Then, the first push cylinder 43 of the drilling assembly 4 is started to push the first motor box 45, the first drive motor 48, and the drill bit 49 upward. The first drive motor 48 is started to drive the drill bit 49 to rotate and drill the ductile iron jacking pipe. After drilling, the first motor box 45 is lowered. At the same time as drilling, the vacuum cleaner 63 works, and the air in the hollow pipe frame 61 is drawn through the vacuum pipe 64, so that the chip collection hood 62 generates suction to suck the debris generated by drilling into the hood 63 for collection. S2. After drilling a hole on the outer arc surface of the ductile iron jacking pipe, the first servo motor 23 of the support assembly 2 drives the active pulley 24 to rotate, and the gear belt 27 drives the driven pulley 25 and the support wheel 22 to rotate, thereby driving the ductile iron jacking pipe to rotate 90°, and then controlling the drilling assembly 4 to drill the next hole. S3. Start the second drive motor 523 of the grinding assembly 5 to drive the grinding head 524 to rotate, and at the same time control the second push cylinder 526 to push out the second motor box 522, so that the grinding head 524 grinds the hole drilled on the ductile iron top pipe, and resets after grinding. S4. After drilling and grinding all the holes, first energize the electromagnet 543 to generate magnetism, which will attract the locking pin 542 and unlock the grinding mechanism 52. Start the linear guide 3 to move the drilling assembly 4 to the bottom of the ductile iron jack on the other side. At the same time, during the movement, when the push bar 537 on the top of the drilling assembly 4 passes the rack 535, the protrusion 5371 and the rubber pad 5353 rub against each other to generate resistance, pushing the rack 535 to move, which in turn drives the semi-circular gear 533 to rotate. The drive column 532, main gear 539 and auxiliary gear 5310 drive the long shaft 538 to rotate, which in turn drives the grinding mechanism 52 to rotate 180°, so that the grinding head 524 faces the ductile iron jack on the other side. Then continue the drilling and grinding work of the ductile iron jack on the other side, and lift the previous ductile iron jack away and replace it with a new ductile iron jack.

[0040] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drilling and grinding assembly for ductile iron jacking pipes, characterized in that, include: The jacking pipe support mechanism is symmetrically arranged in two sets, each supporting a ductile iron jacking pipe. The jacking pipe support mechanism includes a base plate and support components installed at both ends of its top. The support components support and drive the ductile iron jacking pipe to rotate at a specified angle, and the support components release pressure through elastic expansion and contraction. Linear guide rails are installed on the bottom surface between two sets of base plates and do not contact the base plates; The drilling assembly is mounted on the top of the linear guide rail and is driven by the linear guide rail to move to the bottom of the ductile iron jacking pipe. A grinding assembly is installed on the bottom surface between two sets of base plates. The grinding assembly can grind the ductile iron top pipes on both sides by switching their orientation. The grinding assembly includes a stand, which is mounted on the outside of a linear guide rail. A grinding mechanism is rotatably connected to the top of the stand. A linkage mechanism is installed on the inside of the stand. The linkage mechanism uses the thrust of the drilling assembly during lateral movement to drive the grinding mechanism to turn. Electromagnetic locks that lock the angle of the grinding mechanism after rotation are installed at both ends of the top inside of the stand.

2. The drilling and grinding assembly for ductile iron jacking pipes according to claim 1, characterized in that: The linkage mechanism includes a T-shaped plate fixedly connected to one side of the inner wall of the frame. A semi-circular gear is rotatably connected to the top of the T-shaped plate via a drive column. A guide limit strip is fixedly connected to the right end of the top of the T-shaped plate. A rack is slidably connected to the outside of the guide limit strip, and the rack meshes with the semi-circular gear. A long shaft is rotatably connected to the inner center of the frame. A main gear is fixedly connected to both the long shaft and the drive column. A secondary gear that meshes with the two main gears is also fixedly connected to the inside of the frame. The top end of the long shaft is fixedly connected to the bottom of the grinding mechanism. The bottom of the rack is provided with a sliding groove and a damping groove. The sliding groove is slidably connected to the guide limit strip. Both sides of the inner wall of the damping groove are embedded with adhesive pads. The linkage mechanism also includes a push bar that is fixedly connected to the top of the drilling assembly by bolts. When the push bar moves laterally, it passes through the damping groove, and the push bar rubs against the damping groove through several protrusions on both sides to generate damping and push the rack to move.

3. The drilling and grinding assembly for ductile iron jacking pipes according to claim 2, characterized in that: The semi-circular gear is half gear and half rectangular column. When the semi-circular gear rotates 180° in both directions to the extreme positions in both directions, the straight edge of the rectangular column fits into the rack and stops rotating. The top of the rack is fixedly connected to a limit frame, which is sleeved on the outside of the drive column. Both ends of the top of the guide limit strip are convex to limit the sliding distance of the rack.

4. The drilling and grinding assembly for ductile iron jacking pipes according to claim 2, characterized in that: The grinding mechanism includes a sleeve whose bottom is fixedly connected to the top of a long shaft. A second motor housing is axially slidably connected inside the sleeve. A second drive motor is fixedly connected inside the second motor housing, and a grinding head is mounted on the drive shaft of the second drive motor. A push block penetrating the top of the sleeve is connected to the top of the second motor housing. A second push cylinder is fixedly connected to the top of the sleeve, and the output end of the second push cylinder is fixedly connected to the push block to push and pull the second motor housing to slide. A guide groove adapted to the push block is also provided on the top of the sleeve. A positioning hole for inserting an electromagnetic lock is provided at the bottom of the sleeve and the end extending away from the second motor housing.

5. The drilling and grinding assembly for ductile iron jacking pipes according to claim 4, characterized in that: The electromagnetic lock includes a lock housing, inside which a locking pin is slidably connected via a spring, and an electromagnet is fixedly connected through the top of the lock housing. The electromagnet retracts the locking pin by attracting it through electromagnetic induction.

6. The drilling and grinding assembly for ductile iron jacking pipes according to claim 1, characterized in that: The drilling assembly includes a chassis and a housing fixedly connected to its top by bolts. Multiple sets of first push cylinders and guide rods are intermittently fixedly connected to the outer side of the top of the chassis. A first motor housing is also provided on the top of the chassis. A push block and a guide block are fixedly connected to the periphery of the first motor housing. The top of the first push cylinder is fixedly connected to the push block. The guide block is slidably sleeved on the outside of the guide rod. An insertion hole adapted to the top of the guide rod is opened on the top of the inner wall of the housing to position the top of the guide rod. A first drive motor is fixedly connected inside the housing, and a drill bit is installed on the drive shaft of the first drive motor. A limiting sleeve sleeved on the outside of the first push cylinder is fixedly connected to the inner wall of the housing.

7. The drilling and grinding assembly for ductile iron jacking pipes according to claim 6, characterized in that: The linear guide rail includes a base and a track fixedly connected to its top. A lead screw is rotatably connected to the top of the base, and a second servo motor that drives the lead screw to rotate is fixedly connected to one end of the base. Multiple threaded sleeves and a slider are fixedly connected to the bottom of the chassis. The threaded sleeves are slidably fitted on the track, and the slider is threadedly fitted outside the lead screw.

8. The drilling and grinding assembly for ductile iron jacking pipes according to claim 1, characterized in that: The device also includes a chip collection assembly, which includes a hollow tube frame fixedly connected to the top of the base plate and located on one side of the drilling assembly. A chip collection hood is fixedly connected to the top of the hollow tube frame. The chip collection hood has a bowl-shaped structure, and the bottom and sides of the chip collection hood have openings for the drill bit to pass through. The chip collection assembly also includes a vacuum cleaner installed on the ground on one side of the stand. The air inlet of the vacuum cleaner is connected to the hollow tube frame through a vacuum pipe.

9. The drilling and grinding assembly for ductile iron jacking pipes according to claim 1, characterized in that: The support assembly includes a bracket, with support wheels rotatably connected to both ends of the top of the bracket. A first servo motor is fixedly connected inside the bracket, and a drive pulley is fixedly connected to the output end of the first servo motor. A driven pulley is fixedly connected to one end of each support wheel. Multiple reversing pulleys are rotatably connected to the side of the bracket, and a gear belt drives the drive pulley, driven pulley, and reversing pulleys together. The support assembly also includes a support base fixedly connected to the top corner of the base plate, and the bottom of the bracket is slidably connected to the inside of the support base. A damping spring telescopic tube is fixedly connected to the top of the base plate and located inside the support base, and the top of the damping spring telescopic tube abuts against the bracket. The support assembly is also fixedly connected to the support column on the top right side of the base plate, and the top of the support column is rotatably fitted with a limiting wheel.

10. A method of using the drilling and grinding assembly for ductile iron jacking pipes as described in any one of claims 1-9, characterized in that: Specifically, the following steps are included: S1. First, hoist the ductile iron jacking pipe onto the two sets of jacking pipe support mechanisms, start the linear guide rail to drive the drilling assembly to move to the bottom of the ductile iron jacking pipe on one side, and then start the drilling assembly to drill upwards into the ductile iron jacking pipe. S2. After drilling a hole on the outer arc surface of the ductile iron jacking pipe, control the support assembly to drive the ductile iron jacking pipe to rotate 90°, and then control the drilling assembly to drill the next hole. S3. Start the grinding assembly to grind the holes drilled on the ductile iron jacking pipe; S4. After drilling and grinding all the holes, start the linear guide to move the drilling assembly to the bottom of the ductile iron jacking pipe on the other side. At the same time, during the movement, the drilling assembly pushes the linkage mechanism and drives the grinding mechanism to rotate 180°, so that the grinding mechanism faces the ductile iron jacking pipe on the other side. Then continue the drilling and grinding work on the ductile iron jacking pipe on the other side. Then lift the previous ductile iron jacking pipe away and replace it with a new ductile iron jacking pipe.

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