Plastic inspection shaft branch pipe connector trepanning device and trepanning method

Abstract

The invention discloses a plastic inspection shaft branch pipe connector trepanning device and trepanning method.The plastic inspection shaft branch pipe connector trepanning device is used for trepanning the shaft wall of an inspection shaft and comprises a workbench, a shaft fixing unit, a trepanning unit and a controller, and the shaft fixing unit comprises a height adjusting mechanism and a supporting mechanism; the height adjusting mechanism comprises a guide rod, a vertical lead screw and a lead screw motor, the supporting mechanism comprises a supporting platform and a telescopic supporting assembly, the trepanning unit comprises a moving mechanism and a drilling mechanism, and the drilling mechanism comprises a drilling motor and a trepanning device. By matching with the height-adjustable telescopic supporting assembly, the inspection shaft can be positioned and fixed according to needs, and a branch pipe connector on the wall of the shaft can be cut, so that a hole is flat and smooth, the control is accurate, the hole opening efficiency is high, the labor intensity is low, and the welding quality of a subsequent branch pipe can also be ensured.

Description

Technical Field

[0001] The invention relates to the technical field of plastic inspection well drilling, and in particular to a plastic inspection well branch pipe interface drilling device and drilling method with accurate positioning and smooth hole opening. Background Art

[0002] Inspection wells are junctions that connect buried drainage pipes within buildings to the city's underground pipe network. They are generally located at the intersection of drainage pipes, bends, diameter changes, slope changes, and waterfalls. They are used to facilitate regular inspections, cleaning, and dredging, as well as operations down the well. They are also workstations for pipe dredging. Currently, there are plastic one-piece injection-molded inspection wells and brick-built inspection wells on the market. Plastic inspection wells use a dedicated wellbore, which can be cut to the corresponding length according to the on-site burial depth. They are flexible and convenient. The inlet and outlet pipes are connected to the wellbore using hot-melt welding or a flexible socket-and-socket connection with a sealing ring. They can adapt to certain angle changes, are easy to construct, have good sealing performance and prevent leakage, and effectively prevent secondary pollution of groundwater. They are an environmentally friendly and energy-saving building material.

[0003] The holes for connecting pipe interfaces in plastic inspection wells are generally opened manually using small electric tools. Due to the inconsistency in the depth and width of the well wall at the opening, this method will lead to deviation in the opening position, uneven and rough bending of the hole mouth, making it difficult to ensure the welding quality. The welded inlet and outlet pipes are easy to fall off, have poor shear resistance, poor sealing at the weld, and are prone to leakage and polluting the environment. At the same time, manual hole opening takes a long time, is inefficient, and has high labor intensity. The debris and dust generated during the opening will also affect human health and pollute the environment. Summary of the Invention

[0004] The present invention mainly solves the above-mentioned technical problems and provides a plastic inspection shaft branch pipe interface hole opening device and hole opening method with accurate positioning and smooth hole opening.

[0005] In order to solve the above-mentioned technical problems, the present invention mainly adopts the following technical solutions: A plastic inspection shaft branch pipe interface opening device of the present invention comprises: A workbench is used to place the inspection shaft, shaft fixing unit, and opening unit; A shaft fixing unit, used to position, clamp and fix the inspection shaft, includes a height adjustment mechanism and a support mechanism. The height adjustment mechanism includes a guide rod, a vertical screw rod and a screw motor that drives the vertical screw rod. The support mechanism includes a support platform and a telescopic support assembly placed on the support platform. The support platform is sleeved on the vertical screw rod and rises and falls with the vertical screw rod. A hole-drilling unit, used for drilling a hole in the wall of the inspection shaft, comprising a moving mechanism and a drilling mechanism; A controller that controls the wellbore fixing unit and the hole-opening unit, including a human-machine interface; The hole-opening device uses a drilling mechanism with an adjustable hole diameter, combined with a telescopic support assembly with an adjustable height. It can position and fix the wellbore as needed, cut and open the wall of the barrel, making the opening of the branch pipe smooth, accurately controlled, with high opening efficiency and low labor intensity, and also ensuring the welding quality of the subsequent branch pipes.

[0006] Preferably, a positioning ring groove that matches the diameter of the inspection wellbore is provided on the workbench. The width of the positioning ring groove matches the wall thickness of the inspection wellbore. The lower end of the inspection wellbore is embedded in the positioning ring groove and positioned on the workbench. The axis of the vertical lead screw coincides with the central axis of the positioning ring groove. The above-mentioned guide rod is fixed on the workbench and perpendicular to the surface of the workbench. The above-mentioned support platform is sleeved on the vertical lead screw and the guide rod and rises and falls as the vertical lead screw rotates. The above-mentioned lead screw motor is electrically connected to the above-mentioned controller. The positioning of the inspection wellbore on the workbench uses the positioning ring groove, which is fast and accurate.

[0007] Preferably, the telescopic support assembly includes a plurality of telescopic cylinders. The telescopic cylinders are fixed on the support platform, and the directions of their piston rods are radially arranged at equal angles with the center point of the support platform as the center. The telescopic cylinders are constant-pressure cylinders and are connected to an external air pressure device through air pipes. The telescopic cylinders are electrically connected to the controller. The telescopic length of the piston rod of the telescopic cylinder matches the inner diameter of the inspection wellbore. An arc-shaped support plate is fixed at the end of the piston rod. The support plate matches the inner wall arc surface of the inspection wellbore and moves with the piston rod and fits the inner wall surface of the inspection wellbore. The telescopic inner support structure is adopted, combined with the positioning ring groove, so that the wellbore can be stably, accurately and reliably fixed on the base, and the control is convenient. The constant-pressure cylinder drives the support plate to have a constant clamping force on the inner wall of the wellbore.

[0008] Preferably, there are four telescopic cylinders, which are evenly distributed in a cross shape on the support platform. The cross-shaped inner support structure is adopted to achieve multi-point tensioning support, and the support force is dispersed and uniform.

[0009] Preferably, the support plate is a vacuum chuck. A vacuum tube is provided on the back of the chuck and is connected to an external vacuum device through a chuck control valve. The control valve of the chuck is electrically connected to the controller. The vacuum chuck is used as the clamping method between the support end and the inner wall of the wellbore, and the support is tight and reliable.

[0010] Preferably, the moving mechanism includes a longitudinally arranged guide rail, a sliding table, and a propulsion cylinder. The guide rail and the propulsion cylinder are fixed on the workbench. The sliding table is placed on the guide rail and slides along the guide rail. The end of the piston rod of the propulsion cylinder is connected to the sliding table and drives the sliding table to move. The propulsion cylinder is a constant-pressure cylinder and is connected to an external air pressure device through an air pipe. The propulsion cylinder is electrically connected to the controller. The drilling mechanism includes a drilling motor and a hole opener. The drilling motor is fixed on the sliding table. The hole opener is sleeved on the output shaft of the drilling motor. The hole opener is provided with alloy cutting heads, and the alloy cutting heads correspond to and cut the wall of the inspection wellbore. The drilling motor is electrically connected to the controller. Using a constant-pressure propulsion cylinder to drive the drilling mechanism to move can keep the cutting torque of the cutting head constant, and the control is simple and reliable, and the hole opening is smooth and flat.

[0011] Preferably, the hole opener is of an aircraft-type hole opener structure, including a drill frame. The tail of the drill frame is fixed to the output shaft of the drilling motor. A transverse adjusting rod is embedded in the middle of the drill frame. A positioning center drill is clamped at the head of the drill frame. The positioning center drill corresponds to the opening center of the above-mentioned inspection wellbore. Two cutter head clamping sleeves that can move horizontally along the adjusting rod are respectively sleeved at both ends of the adjusting rod. The adjusting positions of the cutter head clamping sleeves correspond to the aperture of the branch pipe opening. Alloy cutting heads for cutting the branch pipe opening are fixed at the front ends of the cutter head clamping sleeves. Using an aircraft-type hole opener can flexibly adjust the position of the cutter head according to the size of the opening of the branch pipe interface, and has strong adaptability.

[0012] Preferably, a spring is sleeved on the positioning center drill. The front end of the spring abuts against and pushes the outer wall of the inspection wellbore at the opening of the branch pipe to prevent the eccentricity of the positioning center drill.

[0013] Preferably, the adjusting rod is provided with scale lines, which can visually and accurately adjust the position of the cutter head clamping sleeve on the adjusting rod and correspondingly adjust the aperture of the branch pipe interface opening.

[0014] A method for opening a hole in the branch pipe interface of a plastic inspection wellbore is as follows: A1. Input technical parameters such as the wellbore height, wellbore diameter, branch pipe opening diameter, opening elevation, and motor speed of the plastic inspection well to be processed into the human-machine interface of the controller; A2. Insert the lower end of the plastic inspection well to be processed into the annular groove on the workbench; A3. Next, start the lead screw motor and drive the vertical lead screw to rotate. The support platform rises along the vertical lead screw to the set height. Continue to start the telescopic cylinder to make the piston rod extend, drive the support plate to translate outward and fit against the inner wall of the wellbore under constant pressure to form a cross-shaped inner support structure on the inner wall of the inspection wellbore, and complete the fixation of the inspection wellbore; A4. Next, install and fix the hole opener on the output shaft of the drilling motor, and adjust the cutter head clamping sleeve in the adjustment From the position on the rod to the corresponding opening hole diameter, start the drilling motor to make the hole opener work. The two alloy cutter heads of the hole opener rotate in a circular shape along the axis of the drilling motor; A5. Next, start the propulsion cylinder. The propulsion cylinder pushes the sliding table forward to make the positioning center drill on the hole opener abut against the opening center of the inspection wellbore wall for drilling. With the cooperation of the spring, the positioning center drill can be used for the center positioning and support of the hole opener; A6. At the same time, the two alloy cutter heads on the hole opener start to perform circular cutting operations on the inspection wellbore wall under the constant torque push of the propulsion cylinder, forming a branch pipe interface opening with smooth edges and precise hole diameter; A7. After the opening is completed, the controller controls the piston rod of the propulsion cylinder to retract and drives the sliding table to move backward, and continues to close the drilling motor to stop the hole opener from working; A8. At the same time, the piston rod of the telescopic cylinder retracts and drives the support plate to retreat, releasing the inner support of the wellbore wall. Then, control the screw motor to reverse and drive the support platform to descend and reset, and the inspected wellbore with the opening completed can be removed, preparing for the next opening of the device. The beneficial effects of the present invention are: The opening device adopts a drilling mechanism with adjustable hole diameter, combined with a telescopic inner support assembly with adjustable height, which can position and fix the inspected wellbore according to needs, and perform cutting processing on the opening of the branch pipe interface on the wellbore wall, making the opening flat and smooth, with precise control, high opening efficiency, low labor intensity, and ensuring the welding quality of the subsequent branch pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present invention.

[0016] In the figure, 1. Workbench, 11. Positioning ring groove, 2. Inspected wellbore, 3. Height adjustment mechanism, 31. Guide rod, 32. Vertical lead screw, 33. Lead screw motor, 4. Support mechanism, 41. Support platform, 42. Support assembly, 421. Telescopic cylinder, 422. Support plate, 5. Moving mechanism, 51. Guide rail, 52. Sliding table, 53. Propulsion cylinder, 6. Drilling mechanism, 61. Drilling motor, 62. Hole opener, 621. Drill frame, 622. Adjusting rod, 623. Positioning center drill, 624. Cutter head sleeve, 625. Alloy cutter head, 626. Spring. DETAILED DESCRIPTION OF THE INVENTION

[0017] The technical solutions of the present invention will be further specifically described below through embodiments and in combination with the drawings.

[0018] Embodiment: A plastic inspection wellbore branch pipe interface opening device in this embodiment, such asFigure 1 As shown in, including: A workbench 1 for placing the inspection wellbore 2, the wellbore fixing unit and the hole opening unit; A wellbore fixing unit for positioning, clamping and fixing the inspection wellbore, including a height adjustment mechanism 3 and a support mechanism 4. The height adjustment mechanism includes a guide rod 31, a vertical lead screw 32 and a lead screw motor 33 for driving the lead screw, which are installed on the workbench. The support mechanism includes a support platform 41 and a telescopic support assembly 42 installed on the support platform. The support platform is sleeved on the vertical lead screw and moves up and down with the vertical lead screw; A hole opening unit for opening a hole in the wall of the inspection wellbore, including a moving mechanism 5 and a drilling mechanism 6; A controller for controlling the wellbore fixing unit and the hole opening unit, including a human-machine interaction interface; Among them, a positioning ring groove that matches the diameter of the inspection wellbore is designed on the workbench. The groove width of the positioning ring groove matches the wall thickness of the inspection wellbore. The lower end of the inspection wellbore is embedded in the positioning ring groove and positioned on the workbench. The axis of the above-mentioned vertical screw rod coincides with the central axis of the positioning ring groove. The above-mentioned support platform is sleeved on the vertical screw rod and can be lifted and lowered with the vertical screw rod. The above-mentioned screw rod motor is electrically connected to the above-mentioned controller and drives the vertical screw rod to rotate; among them, the telescopic support assembly includes four telescopic cylinders 421. The telescopic cylinders are all constant-pressure cylinders and are connected to an external air pressure device through air pipes. The telescopic cylinders are electrically connected to the controller. The four telescopic cylinders are evenly distributed in a cross-shaped circular pattern on the support platform. The directions of the telescopic cylinders radiate outward at equal angles with the center point of the support platform as the center. The length of the piston rod of the telescopic cylinder matches the inner diameter of the inspection wellbore. An arc-shaped support plate 422 is installed at the end of the piston rod. The outer surface of the support plate matches the inner wall surface of the inspection wellbore and fits against the inner wall surface of the wellbore as the piston rod is pushed; among them, the moving mechanism includes a guide rail 51, a sliding table 52, and a propulsion cylinder 53. The guide rail is longitudinally arranged on the workbench. The sliding table is installed on the guide rail and slides along the guide rail. The above-mentioned propulsion cylinder is fixedly installed on the workbench. The end of its piston rod is connected to the sliding table and can drive the sliding table to move. The propulsion cylinder is a constant-pressure cylinder and is connected to an external air pressure device through an air pipe. The propulsion cylinder is electrically connected to the controller; among them, the drilling mechanism includes a drilling motor 61 and a hole opener 62. The drilling motor is installed on the sliding table and its output shaft is in the same direction as the guide rail. The drilling motor is electrically connected to the controller. The above-mentioned hole opener is of an aircraft-type hole opener structure, including a drill frame 621. The tail of the drill frame is fixed to the output shaft of the drilling motor. A positioning center drill 623 is clamped at the head of the drill frame. The positioning center drill corresponds to the center of the hole of the branch pipe of the above-mentioned inspection wellbore. A spring 626 is sleeved on the positioning center drill. The front end of the spring is compressed and abuts against the wall of the branch pipe opening of the inspection wellbore. A transverse adjusting rod 622 is embedded in the middle of the drill frame. Scale lines are designed on the adjusting rod. Two tool head collets 624 that can move horizontally along the adjusting rod and are mirror-symmetric with the center of the drill frame are respectively sleeved at both ends of the adjusting rod. The adjusting position of the tool head collet corresponds to the aperture of the branch pipe opening. An alloy tool head 625 for cutting the branch pipe opening is installed at the front end of the tool head collet.

[0019] The hole-opening method based on the above hole-opening device is as follows. First, insert the lower end of the inspection wellbore into the positioning ring groove on the workbench, input technical parameters such as the wellbore height, wellbore diameter, branch pipe hole-opening diameter, hole-opening elevation, motor speed, etc. on the human-machine interface of the controller, and start the device. At this time, the controller first starts the lead screw motor to drive the vertical lead screw to rotate. The support platform moves along the lead screw and rises to the height of the branch pipe hole-opening. Then, turn on the telescopic cylinder so that the piston rod of the telescopic cylinder extends, pushing the support plate to move outward and fit and press against the inner wall of the wellbore, forming a cross-shaped inner support structure for the wellbore. Cooperating with the positioning ring groove at the lower end, the inspection wellbore is securely fixed on the base. Then, install and fix the hole opener on the output shaft of the drilling motor, adjust the position of the tool head collet on the adjusting rod to the corresponding hole-opening diameter, turn on the drilling motor to make the hole opener work. The two alloy tool heads of the hole opener rotate in a circular shape along the axis of the drilling motor. The controller starts the propulsion cylinder to work. The propulsion cylinder drives the sliding table to move forward so that the positioning center drill on the hole opener presses against the hole-opening center of the inspection wellbore wall and opens the hole. The positioning center drill can be used for the center positioning and support of the hole opener. At the same time, due to the action of the spring, the two alloy tool heads on the hole opener start to perform circular cutting operations on the inspection wellbore wall under the constant torque push of the propulsion cylinder, forming a branch pipe interface hole with a smooth edge and accurate hole diameter.

[0020] After the hole is opened, the controller controls the piston rod of the propulsion cylinder to retract and drives the sliding table to move backward. Then continue to turn off the drilling motor to stop the hole opener from working. At the same time, the piston rod of the telescopic cylinder retracts and drives the support plate to retreat, releasing the inner support of the wellbore wall. Then control the lead screw motor to reverse and drive the support platform to descend and reset. The inspected wellbore with the hole opened can be removed, preparing for the next hole-opening of the device.

[0021] In the description of the present invention, the technical terms "upper", "lower", "front", "rear", "left", "right", "longitudinal", "transverse", "inner", "outer", etc. indicating directions or position relationships are based on the directions or position relationships shown in the drawings, and are only for the convenience of describing and understanding the technical solution of the present invention. The above description does not limit the present invention, and the present invention is not limited to the examples described above. Any changes, modifications, additions, or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention should be regarded as within the protection scope of the present invention.

Claims

1. A plastic inspection wellbore branch pipe interface opening device, characterized in that include: A workbench (1) is used to place an inspection shaft (2) and a shaft fixing unit and a hole opening unit; A shaft fixing unit, used for positioning, clamping and fixing an inspection shaft, comprises a height adjustment mechanism (3) and a support mechanism (4), wherein the height adjustment mechanism comprises a guide rod (31), a vertical screw rod (32) and a screw motor (33) for driving the vertical screw rod, and the support mechanism comprises a support platform (41) and a telescopic support assembly (42) placed on the support platform, wherein the support platform is sleeved on the vertical screw rod and rises and falls with the vertical screw rod; A hole-drilling unit, used for drilling a hole in the wall of the inspection shaft, comprising a moving mechanism (5) and a drilling mechanism (6); The controller controls the wellbore fixing unit and the opening unit, including a human-machine interface.

2. The plastic inspection wellbore branch pipe interface hole-opening device according to claim 1, characterized in that: The workbench (1) is provided with a positioning ring groove (11) that matches the diameter of the inspection shaft (2), and the groove width of the positioning ring groove matches the wall thickness of the inspection shaft. The lower end of the inspection shaft is embedded in the positioning ring groove and positioned on the workbench. The axis of the vertical screw rod (32) coincides with the center axis of the positioning ring groove. The guide rod (31) is fixed on the workbench and perpendicular to the workbench surface. The support platform (41) is sleeved on the vertical screw rod and the guide rod and rises and falls with the rotation of the vertical screw rod. The screw motor (33) is electrically connected to the controller.

3. The plastic inspection wellbore branch pipe interface opening device according to claim 1 or 2, characterized in that: The telescopic support assembly (42) includes a plurality of telescopic cylinders (421), which are fixed on the support platform and have piston rods arranged to radiate at equal angles with the center point of the support platform as the center of the circle. The telescopic cylinders are constant pressure cylinders and are connected to an external air pressure device through an air pipe. The telescopic cylinders are electrically connected to the controller. The telescopic length of the piston rods matches the inner diameter of the inspection shaft (2). An arc-shaped support plate (422) is fixed at the end of the piston rod. The support plate matches the arc surface of the inner wall of the inspection shaft and fits the inner wall surface of the inspection shaft as the piston rod of the telescopic cylinder moves.

4. The plastic inspection wellbore branch pipe interface hole-opening device according to claim 3, characterized in that: The telescopic cylinders (421) are four in number and are evenly distributed on the supporting platform (41) in a cross circle.

5. The plastic inspection wellbore branch pipe interface opening device according to claim 4, characterized in that: A vacuum suction cup is provided on the surface of the support plate (422), a vacuum tube is provided on the back of the suction cup and is connected to an external vacuum device via a suction cup control valve, and the suction cup control valve is electrically connected to the controller.

6. The plastic inspection wellbore branch pipe interface opening device according to claim 1, characterized in that: The moving mechanism (5) includes a longitudinally arranged guide rail (51), a slide (52) and a propulsion cylinder (53), the guide rail and the propulsion cylinder are fixed on the workbench (1), the slide is placed on the guide rail and slides along the guide rail, the piston rod end of the propulsion cylinder is connected to the slide and drives the slide to move, the propulsion cylinder is a constant pressure cylinder and is connected to an external air pressure device through an air pipe, the propulsion cylinder is electrically connected to the controller, the drilling mechanism (6) includes a drilling motor (61) and a hole opener (62), the drilling motor is fixed on the slide, the hole opener is sleeved on the output shaft of the drilling motor, the hole opener is provided with an alloy cutter head, the alloy cutter head corresponds to and cuts the wall of the inspection shaft (2), and the drilling motor is electrically connected to the controller.

7. The plastic inspection wellbore branch pipe interface hole opening device according to claim 6, characterized in that: The hole opener (62) is of an aircraft-shaped hole opener structure, including a drill frame (621). The tail of the drill frame is fixed to the output shaft of the drilling motor. A transverse adjusting rod (622) is embedded in the middle of the drill frame. A positioning center drill (623) is clamped at the head of the drill frame. The positioning center drill corresponds to the opening center of the inspection wellbore (2) mentioned above. Two tool head collets (624) that can move horizontally along the adjusting rod are sleeved at both ends of the adjusting rod. The adjusting positions of the tool head collets correspond to the aperture diameters of the branch pipe openings. An alloy tool head (625) for cutting the branch pipe openings is fixed to the front end of the tool head collet.

8. The plastic inspection wellbore branch pipe interface opening device according to claim 7, characterized in that: A spring (626) is sleeved on the positioning center drill (623). The front end of the spring abuts against and pushes the outer wall of the inspection wellbore (2).

9. The plastic inspection wellbore branch pipe interface hole opening device according to claim 7 or 8, characterized in that: Scale lines are provided on the adjusting rod (622).

10. A method for opening holes in the branch pipe interface of a plastic inspection wellbore, the steps are as follows: A1. Input technical parameters such as the wellbore height, wellbore diameter, branch pipe opening diameter, opening elevation, motor speed, etc. of the plastic inspection well to be processed into the human-machine interaction interface of the controller; A2. Insert the lower end of the plastic inspection wellbore to be processed into the annular groove on the workbench; A3. Next, start the lead screw motor and drive the vertical lead screw to rotate. The support platform rises along the vertical lead screw to the set height. Then start the telescopic cylinder to make the piston rod extend, drive the support plate to move outward and press against the inner wall of the wellbore constantly, forming a cross-shaped inner support structure on the inner wall of the inspection wellbore to complete the fixation of the inspection wellbore; A4. Next, install and fix the hole opener on the output shaft of the drilling motor, adjust the position of the tool head collet on the adjusting rod to the corresponding opening aperture, turn on the drilling motor to make the hole opener work, and the two alloy tool heads of the hole opener rotate circumferentially along the axis of the drilling motor; A5. Next, start the propulsion cylinder. The propulsion cylinder pushes the sliding table forward to make the positioning center drill on the hole opener abut against the opening center of the inspection wellbore wall and drill a hole. With the cooperation of the spring, the positioning center drill can be used as the center positioning and support of the hole opener; A6. At the same time, the two alloy tool heads on the hole opener start to perform circumferential cutting operations on the inspection wellbore wall under the constant torque push of the propulsion cylinder, forming a branch pipe interface opening with a smooth edge and accurate aperture; A7. After the hole opening is completed, the controller controls the piston rod of the propulsion cylinder to retract and drive the sliding table to move backward. Then turn off the drilling motor to stop the hole opener from working; A8. At the same time, the piston rod of the telescopic cylinder retracts and drives the support plate to retreat, releasing the inner support on the wellbore wall. Then control the lead screw motor to reverse and drive the support platform to descend and reset, and the inspected wellbore with the hole opened can be removed to prepare for the next hole opening of the device.

Images