A concrete protective door drilling machine

Abstract

This invention belongs to the technical field of concrete drilling equipment, specifically a concrete protective door drilling machine. It includes a support plate, with a calibration box fixedly installed at the bottom of the support plate. The calibration box contains an adjustment mechanism for adjusting the position of the device, aligning it with the desired drilling location on the concrete protective door. A cavity tube is fixedly installed at the top of the support plate, and an expansion unit is installed inside the cavity tube. A connecting rod is threaded into the internal thread of a rotating shaft, causing the connecting rod to rotate. This, in turn, causes the cutting tools formed by the soil trimming blade and the soil breaking blade to rotate. A drilling motor continuously advances the connecting rod, causing the soil breaking blade to break up the concrete, and the soil trimming blade to scrape and smooth the broken concrete, resulting in a smooth and clean hole. This method eliminates the need to change drill bits during drilling, making the drilling operation more convenient.

Description

Technical Field

[0001] This invention belongs to the technical field of concrete hole-opening equipment, specifically a concrete protective door hole-opening machine. Background Technology

[0002] Concrete protective doors are airtight doors used in buildings, primarily providing fire protection, waterproofing, and sound insulation. These doors are typically made of reinforced concrete, characterized by high strength and compressive strength, and are therefore widely used in public buildings, commercial buildings, and residential buildings.

[0003] A Chinese patent with announcement number CN208468751U discloses a concentric drilling machine for concrete protective doors. The machine includes a limit barrel fixedly installed on the lower plane of the frame, two hydraulic cylinders fixedly installed on the frame, chains fixedly installed on the piston rods of the two hydraulic cylinders, the chains fixedly connected to a weight plate, the weight plate slidably connected to the limit barrel, and a servo motor fixedly installed on the frame. It has advantages such as high drilling efficiency, less risk of misalignment during drilling, and low labor intensity for workers. Because the support plate is rotatably connected to the frame, it can rotate around the frame, thus enabling the drilled holes to be located on the circumference of a circle.

[0004] Currently, in existing technologies, when drilling holes in concrete protective doors, workers typically first need to drill a hole at the designated location using an electric drill. Once the hole is drilled, different drill bits are used to drill multiple times to increase the hole diameter and achieve the desired opening. This method greatly ensures accuracy and stability during drilling, preventing the concrete protective door from cracking. However, due to the numerous steps involved, the drilling process is extremely physically demanding and reduces efficiency. Furthermore, since concrete is composed of cement, water, sand, and gravel, drilling generates dust and debris, requiring repeated cleaning after the drilling is completed, which is quite troublesome.

[0005] Therefore, the present invention provides a concrete protective door drilling machine. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the fact that the drilling process is very labor-intensive and reduces the efficiency of drilling, and that because concrete is composed of cement, water, sand and gravel, dust will be generated during drilling and stone debris will fall out at the drilling site, requiring cleaning again after drilling is completed.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: a concrete protective door drilling machine, including a support plate, a positioning box fixedly installed at the bottom of the support plate, an adjustment mechanism inside the positioning box, the adjustment mechanism being used to adjust the position of the device so that the device is aligned with the position of the concrete protective door where a hole needs to be drilled, a cavity tube fixedly installed at the top of the support plate, an expansion unit being provided inside the cavity tube, the expansion unit including a soil trimming blade, the number of which is multiple, the expansion unit being used to adjust and drive soil trimming blades of different diameters to drill holes at the positions where holes need to be drilled on the concrete protective door, an electric drill bit being provided in the middle of the cavity tube, the electric drill bit being placed inside the expansion unit, a dust removal unit being provided outside one end of the cavity tube, the dust removal unit including a sprayer, the dust removal unit being used to collect and treat the dust and stones drilled out by the expansion unit when it is drilling holes in the concrete protective door;

[0008] In use, the concrete protective door is placed vertically, and then the position adjustment box is controlled to adjust the expansion unit to be level with the center of the hole. When the adjustment is complete, the expansion unit in the control chamber drives the electric drill bit to drill the hole where the concrete protective door needs to be drilled. When the drilling is finished, the expansion unit continues to drive the soil trimmer to enlarge the hole drilled by the electric drill bit. While the expansion unit is working, the dust removal unit works in conjunction with it. When the expansion unit is drilling the hole in the concrete protective door, the dust removal unit collects and treats the dust and stones drilled by the expansion unit. This saves the step of cleaning up the stone debris and dust after the drilling is completed, reducing the waste of manpower. By first driving the electric drill bit to drill the hole where the concrete protective door needs to be drilled by the expansion unit, and then controlling the expansion unit to drive the soil trimmer to enlarge the hole drilled by the electric drill bit, the operator does not need to frequently change the drill bit, saving manpower and improving drilling efficiency.

[0009] Preferably, the expansion unit further includes a cutting tool adjustment assembly, a drilling assembly, and a cutting tool assembly. The drilling assembly includes a rotary cylinder, with a rotating rod fixedly installed at the output end of the rotary cylinder. A connecting rod is fixedly installed at one end of the rotating rod, and one end of the connecting rod is fixedly connected to one end of the electric drill bit. The electric drill bit is placed in the middle of the interior of one end of the cavity tube, with the drill bit end exposed outside the cavity tube. Before drilling, by determining the diameter of the hole, the cutting tool adjustment assembly is controlled to adjust the distance between multiple soil trimming blades, thereby adjusting the diameter of the multiple soil trimming blades so that the diameter of the annular cutting tool holder formed by the multiple soil trimming blades can meet the diameter of the hole. When the adjustment is completed, the rotary cylinder is then controlled to drive the connecting rod to rotate through the rotating rod. When the connecting rod rotates, it drives the electric drill bit to rotate, thereby starting the electric drill bit and realizing the drilling operation of the concrete protective door.

[0010] Preferably, a drilling motor is fixedly installed on the top of the support plate, and a receiving ring block is fixedly installed on the outer wall of the rotary cylinder. The output end of the drilling motor passes through the inner wall of the cavity tube and is fixedly connected to one side of the receiving ring block. The outer wall of the receiving ring block is slidably connected to the inner wall of the cavity tube. When the rotary cylinder drives the electric drill bit to rotate and perform drilling operations, the drilling motor slowly drives the rotary cylinder to move inside the cavity tube through the receiving ring block, thereby driving the electric drill bit to slowly extend from inside the cavity tube to drill a hole in the concrete protective door. When the electric drill bit finishes drilling the concrete protective door, the drilling assembly and the cutter assembly cooperate with each other to drive the ring cutter holder composed of multiple soil trimming cutters to rotate. During rotation, the high-speed rotation can form a hole-reaming cutter. The drilling motor continues to drive the receiving ring block to slide inside the cavity tube, and the hole-reaming cutter formed by the multiple soil trimming cutters will expand the hole drilled by the electric drill bit, thereby achieving the effect of opening a hole.

[0011] Preferably, the cutter assembly includes a rotating shaft with an internal threaded opening on the inner wall of one end and a threaded interface on one end of a connecting rod. The outer wall of the threaded interface can be threadedly connected to the inner wall of the internal threaded opening. The rotating shaft is located outside the drill bit. A cutter storage block is fixedly installed at one end of the rotating shaft. A hollow disc is fixedly installed inside the cutter storage block. Multiple soil-breaking blades are slidably connected inside the cutter storage block. The tops of the multiple soil-breaking blades are fixedly connected to the bottoms of multiple soil-trimming blades. Multiple sliding blade rods are fixedly installed outside the hollow disc. The inner walls of the multiple soil-trimming blades are slidably connected to the inner walls of the multiple sliding blade rods. Multiple return springs are provided between the inner sides of the multiple soil-trimming blades and the outer wall of the hollow disc. The multiple return springs are located outside the multiple sliding blade rods. The multiple soil-trimming blades and soil-breaking blades are slidably connected to the inner wall of the cutter storage block. By pushing the soil-trimming blades with the cutter adjustment assembly, the return springs are pulled to slide on the sliding blade rods, and the soil-trimming blades will move on the cutter storage block. When moving, the soil-trimming blades drive the soil-breaking blades... The soil trimming blades move together. When the blade adjusting assembly stops adjusting, the multiple soil trimming blades stop moving outward. At this time, the multiple soil trimming blades and soil breaking blades form a complete cutting tool. When the electric drill bit completes drilling the hole in the concrete protective door, one end of the connecting rod rotates into the inner end of the rotating shaft. The threaded interface on one end of the connecting rod is then tightened into the inner thread of the rotating shaft. When the threaded interface is fully screwed into the inner thread, the connecting rod drives the rotating shaft to rotate, thereby driving the cutting tool formed by the soil trimming blade and soil breaking blade to rotate through the blade storage block. The drill motor drives the connecting rod to continue advancing, and the cutting tool will enlarge the hole drilled by the electric drill bit through high-speed rotation. During the enlargement, the soil breaking blade breaks the concrete, and the soil trimming blade scrapes and repairs the concrete broken by the soil breaking blade, so that the hole is smooth and clean, thus achieving the effect of hole opening. With this method of hole opening, there is no need to change different drill bits, which is more conducive to hole opening operations.

[0012] Preferably, a cutting edge ring is fixedly installed at one end of the cutting edge block. Multiple soil-expanding blades are fixedly installed on the outer wall of the cutting edge ring, and multiple sliding grooves are opened on the inner wall of the cutting edge ring. The bottom ends of the multiple soil-breaking blades are slidably connected to the inner walls of the multiple sliding grooves. When the cutting edge block rotates, it also drives the cutting edge ring at the bottom of the cutting edge block to rotate. When the cutting edge ring rotates, it drives the multiple soil-expanding blades on its outside to rotate. When the electric drill bit finishes its operation, the drill motor drives the connecting rod to continue to advance. During the advance, the soil-expanding blades on the cutting edge ring will first approach the hole opening to slightly expand the hole opening. Then, through the advancement of the drill motor, the soil-repairing blades and soil-breaking blades further expand and repair the hole, which plays a role in transitioning the hole expansion. This prevents the soil-repairing blades and soil-breaking blades from not being able to enter the hole during hole expansion because the outer end of the cutting edge block is a conical ring. At the same time, it also avoids friction drilling at the hole opening of the concrete when the cutting edge block rotates at high speed, which could cause cracking or breakage at the hole opening.

[0013] Preferably, an inner tube is fixedly installed on the inner wall of the cavity tube, a limit ring is fixedly installed on the inner wall of the inner tube, a slip ring is slidably connected to the inner wall of the inner tube, and multiple shafts are fixedly installed on the inner side of the slip ring. A ring groove is formed on the inner wall of one end of the rotating shaft, and a plate frame is slidably connected to the inner wall of the ring groove. One end of each of the multiple shafts passes through the inner wall of the limit ring and is fixedly connected to one side of the plate frame. The outer walls of the multiple shafts are slidably connected to the inner wall of the limit ring. Multiple return springs are provided between the slip ring and the limit ring, and the multiple return springs are respectively placed outside the multiple shafts. The outer wall of the plate frame is slidably connected to the inner wall of the inner tube. Next, when the drilling motor drives the rotating shaft to continuously advance through the connecting rod, the rotating shaft pulls the slip ring to slide inside the inner tube through the plate frame. When sliding, the slip ring squeezes the return spring to slide. When the drilling operation ends, the rotating cylinder drives the connecting rod to reverse, and the drilling motor drives the rotating cylinder and connecting rod to return to their original positions. The screw interface will then rotate out of the inner thread, thereby driving the drill bit to retract into the cavity tube. At the same time, the rotating shaft is reset under the elastic force of the return spring, preventing the rotating shaft from losing power and failing to reset when the screw interface rotates out of the inner thread, thus playing the role of resetting the rotating shaft.

[0014] Preferably, the blade adjusting assembly includes a blade pressing block, which is slidably disposed inside the cavity tube. The outer wall of the blade pressing block is slidably connected to the top of multiple soil trimming blades. An annular plate is fixedly installed on the outer wall of the blade pressing block. Multiple through slots are opened on the inner wall of the rotating shaft. The inner rod of the annular plate is slidably connected to the inner wall of the multiple through slots. A ring motor is fixedly installed on the outer wall of the inner tube. A rod holder plate is fixedly installed at the output end of the ring motor. One end of the rod holder plate is rotatably connected to the inner wall of the annular plate. By controlling the ring motor to drive the annular plate to slide on the rotating shaft, the annular plate drives the blade pressing block to squeeze the inner wall of the multiple soil trimming blades when it slides, thereby pushing the multiple soil trimming blades and soil breaking blades to move outward, thereby adjusting the distance between the multiple soil trimming blades and soil breaking blades so that the distance between them is the same as the diameter of the opening, thus playing the role of adjusting the blade diameter.

[0015] Preferably, the dust removal unit also includes exhaust fan blocks, which are fixedly installed on the outside of the annular plate. A water injector is fixedly installed on the outer wall of the cavity tube, and the water injector is located outside the ring motor. An annular shell is fixedly installed on the outer wall of the water injector, and a sprayer is fixedly installed on the inner wall of the annular shell. A water pipe is fixedly installed between the sprayer and the water injector. A slag baffle is fixedly installed at one end of the annular shell, and the slag baffle is fixedly installed at one end of the cavity tube. The inner surface of the exhaust fan block is a curved fan blade, and the outer surface is a flat surface. During operation, gas is drawn in from the outside to the inside. The setting of the inner rod of the annular plate will also drive the annular plate to rotate. When the annular plate rotates, it drives multiple exhaust fan blocks to rotate, and multiple exhaust fans are drawn in. When the fan block rotates, it generates airflow. The inner surface of the fan block has curved blades, while the outer surface is flat. When airflow is generated, it can be drawn in from the outside. Thus, when making openings in concrete protective doors, the rotating fan block continuously draws air from the opening, drawing the smoke and dust generated during the opening into the annular housing. When the smoke and dust enter the annular housing, the water injector injects water into the sprayer through the water pipe. The water injector sprays the injected water, and the water mist blown by the airflow generated by the fan block comes into contact with the smoke and dust drawn in by the fan block, thereby eliminating the smoke and dust generated during the opening and achieving the function of smoke removal.

[0016] Preferably, a cleaning plate water box is fixedly installed on the top of the ring shell, a water-sliding port is opened on the inner wall of the upper surface of the ring shell, a drainage groove is opened on the lower surface of the ring shell, and a water-sliding plate is provided on the inner side of the water injector. When the water mist sprayed by the sprayer is blown by the wind generated by the exhaust fan, the water mist will be blown onto the water-sliding plate. Driven by the gas, the smoke and dust drawn in will also be blown onto the water-sliding plate. When the smoke and dust come into contact with the water on the water-sliding plate, the water will cool the high-temperature smoke and absorb the particulate matter in the smoke, thereby reducing the smoke temperature and reducing the diffusion of harmful substances, thus achieving the effect of smoke removal. The sedimented impurities will be adsorbed on the water-sliding plate. When there is too much water on the water-sliding plate, water will be poured in from the cleaning plate water box, and the water will flow down from the top of the water-sliding plate along the water-sliding port, and finally flow out from the drainage groove at the bottom of the ring shell, thereby cleaning the water-sliding plate.

[0017] Preferably, a positioning block is fixedly installed on the top of the positioning box, and the positioning block is at the same horizontal level as the center of the support plate. An adjustment motor is fixedly installed on one side of the positioning block, and a sliding shaft is fixedly installed on the inner wall of the positioning block. A mounting plate is provided at the bottom of the sliding shaft, and one end of the mounting plate is fixedly connected to the other side of the positioning block. A telescopic rod is movably connected to the outer wall of the sliding shaft. A slag collection box is fixedly installed on one end of the telescopic rod and on one side of the top of the support plate. A hollow shaft is fixedly installed at the output end of the adjustment motor, and one end of the hollow shaft is fixedly connected to one side of the sliding end of the telescopic rod. The slag collection box located on one side of the top of the support plate has a drawer inside, which is located directly below one end of the ring shell. By erecting the concrete protective door and placing one side of the protective door inside the positioning block, the position of the positioning box is adjusted, allowing the adjustment unit to move. Adjust the position to be level with the center of the opening. Once the adjustment is complete, control the adjustment motor to drive the telescopic rod to slide on the sliding shaft via the hollow shaft. When the slag collection box at one end of the telescopic rod contacts one side of the concrete protective door, stop the adjustment motor. At this time, the two slag collection boxes will be placed on both sides of the opening of the concrete protective door, so that when the adjustment and expansion unit performs the opening operation, the two slag collection boxes can collect the soil and slag coming out of the opening, preventing the soil and slag from falling to the ground and requiring subsequent cleaning. When the soil and slag in the two slag collection boxes are full, water will be generated inside one of the slag collection boxes during the slag collection process. By pushing the telescopic rod to rotate on the sliding shaft, the soil and slag in the dry slag collection box can be poured out. By pulling the drawer out of the wet slag collection box, the soil and slag collected inside can be removed.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. The concrete protective door drilling machine of the present invention, when the electric drill bit completes drilling the concrete protective door, the threaded interface on one end of the connecting rod will be tightened into the internal thread in the rotating shaft, and the connecting rod can drive the rotating shaft to rotate. In this way, the cutting tool formed by the cutting tool storage block and the soil trimming tool will rotate. The connecting rod is continuously advanced by the drilling motor, and the cutting tool will enlarge the hole drilled by the electric drill bit through high-speed rotation. During the enlargement, the soil trimming tool breaks the concrete, and the soil trimming tool scrapes and repairs the concrete broken by the soil trimming tool, so that the hole is smooth and clean, thereby achieving the effect of drilling. With this method, there is no need to change different drill bits when drilling, which is more conducive to drilling operations.

[0020] 2. The concrete protective door drilling machine of the present invention, when the cutter storage block rotates, drives the cutter ring to rotate, and when the cutter ring rotates, it drives multiple soil-expanding cutters on its outside to rotate. When the electric drill bit finishes its operation, the drill feeding motor drives the connecting rod to continue to advance. During the advance, the soil-expanding cutters on the cutter ring will first approach the hole opening to slightly expand the hole opening. Then, through the advance of the drill feeding motor, the soil-repairing cutter and the soil-breaking cutter further expand the hole, which plays a role in transitioning the hole expansion. This prevents the soil-repairing cutter and the soil-breaking cutter from being unable to enter the hole during the hole expansion because the outer end of the cutter storage block is a conical ring. At the same time, it avoids friction drilling at the hole opening caused by the cutter storage block rotating at high speed, which could lead to cracking or breakage at the hole opening.

[0021] 3. The concrete protective door drilling machine of the present invention controls a ring motor to drive a ring plate to slide on a rotating shaft. When the ring plate slides, it drives the pressure block to squeeze the inner wall of multiple soil trimming blades, thereby pushing multiple soil trimming blades and soil breaking blades to move outward, thereby adjusting the distance between the multiple soil trimming blades and soil breaking blades so that the distance between them is the same as the diameter of the hole to be drilled, which plays the role of adjusting the blade diameter. This allows the device to drill holes of different diameters without changing the drill bit.

[0022] 4. The concrete protective door drilling machine of the present invention uses a rotating cylinder to drive a ring plate to rotate, which in turn drives multiple exhaust fan blocks to rotate, thereby generating airflow. The inner surface of the exhaust fan blocks is a curved blade, and the outer surface is a flat surface. When airflow is generated, airflow can be drawn in from the outside. Thus, when drilling a concrete protective door, the rotating exhaust fan blocks continuously evacuate the drilling site, drawing the smoke and dust generated during drilling into the ring shell. When the smoke and dust enter the ring shell, a water injector injects water into a sprayer through a water pipe. The water injector sprays the injected water out, and the water mist blown by the air force generated by the exhaust fan blocks comes into contact with the smoke and dust drawn in by the exhaust fan blocks, thereby eliminating the smoke and dust generated during drilling and achieving the function of smoke removal.

[0023] 5. The concrete protective door drilling machine of the present invention controls the adjustment motor to drive the telescopic rod to slide on the sliding shaft through the hollow shaft. When the slag collection box on one end of the telescopic rod contacts one side of the concrete protective door, the adjustment motor stops operating. At this time, the two slag collection boxes will be placed on both sides of the opening of the concrete protective door. When the adjustment and expansion unit performs the drilling operation, the two slag collection boxes will receive the soil and slag coming out of the opening, preventing the soil and slag from falling to the ground and requiring subsequent cleaning, reducing the workload of the operators, and thus reducing the work pressure of the workers. Attached Figure Description

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] Figure 1 This is an overall diagram of the invention;

[0026] Figure 2 This is a side view of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the material ring block in this invention;

[0028] Figure 4 This is a schematic diagram of the structure of the pole frame plate in this invention;

[0029] Figure 5 This is a schematic diagram of the structure of the exhaust fan block in this invention;

[0030] Figure 6 This is a schematic diagram of the structure at the connecting rod in this invention;

[0031] Figure 7 This is a schematic diagram of the structure of the plate frame in this invention;

[0032] Figure 8 This is a schematic diagram of the structure at the rotation axis in this invention;

[0033] Figure 9 This is a schematic diagram of the hollow disc plate in this invention;

[0034] Figure 10 This is a schematic diagram of the structure of the sliding groove in this invention;

[0035] Figure 11 This is an exploded view of the electric drill bit in this invention;

[0036] Figure 12 This is a schematic diagram of the structure at the sliding shaft in this invention.

[0037] In the diagram: 1. Calibration box; 2. Drilling motor; 21. Support plate; 22. Storage ring block; 23. Rotating rod; 3. Positioning block; 31. Adjustment motor; 32. Sliding shaft; 33. Hollow shaft; 4. Slag collection box; 41. Drawer; 42. Telescopic rod; 43. Positioning plate; 5. Ring shell; 6. Cleaning plate water box; 61. Sliding nozzle; 7. Rotary cylinder; 8. Cavity tube; 81. Connecting rod; 8101. Threaded interface; 82. Inner tube; 8201. Slip ring; 8202. Return spring; 8203. Shaft; 8204. Limiting ring; 83. Rotating shaft 8301, Internal thread; 8302, Ring groove; 8303, Through groove; 84, Plate frame; 85, Electric drill bit; 86, Cutter storage block; 8601, Soil crushing blade; 8602, Soil trimming blade; 8603, Return blade spring; 8604, Hollow disc plate; 8605, Sliding blade rod; 87, Cutter ring; 8701, Sliding blade groove; 8702, Soil widening blade; 9, Water injector; 91, Sprayer; 92, Water flow pipe; 93, Exhaust fan block; 94, Slag baffle plate; 10, Ring motor; 11, Pole frame plate; 12, Ring disc plate; 1201, Cutter pressing block. Detailed Implementation

[0038] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0039] like Figures 1 to 12 As shown in the embodiment of the present invention, a concrete protective door drilling machine includes a support plate 21. A calibration box 1 is fixedly installed at the bottom of the support plate 21. An adjustment mechanism is provided inside the calibration box 1. The adjustment mechanism is used to adjust the position of the device so that the device is aligned with the position of the hole to be drilled on the concrete protective door. A cavity tube 8 is fixedly installed at the top of the support plate 21. An expansion unit is provided inside the cavity tube 8. The expansion unit includes a soil trimming blade 8602. There are multiple soil trimming blades 8602. The expansion unit is used to adjust and drive soil trimming blades 8602 of different diameters to drill holes in the concrete protective door. An electric drill bit 85 is provided in the middle of the cavity tube 8. The electric drill bit 85 is placed inside the expansion unit. A dust removal unit is provided outside one end of the cavity tube 8. The dust removal unit includes a sprayer 91. When the expansion unit is drilling holes in the concrete protective door, the dust removal unit drives the sprayer 91 to collect and treat the dust and stones drilled out during the drilling operation.

[0040] Because the drilling process involves many steps, it is extremely physically demanding for workers and reduces the efficiency of drilling. Furthermore, since concrete is composed of cement, water, sand, and gravel, dust will be generated during drilling, and stone debris will fall out of the drilling site. After drilling is completed, it is necessary to clean it again.

[0041] In use, the concrete protective door is placed vertically, and then the position adjustment box 1 is controlled to adjust the expansion unit to be level with the center of the opening. When the adjustment is complete, the expansion unit in the control chamber 8 drives the electric drill bit 85 to drill at the location where the concrete protective door needs to be opened. When the drilling is finished, the expansion unit continues to drive the soil trimming blade 8602 to enlarge the hole drilled by the electric drill bit 85. While the expansion unit is working, the dust removal unit works in conjunction with it. When the expansion unit is opening the concrete protective door, the dust removal unit collects and treats the dust and stones produced by the expansion unit during the opening operation, saving the need to deal with the stone debris and stones after the opening operation is completed. The dust removal process reduces manpower waste. The expansion unit first drives the electric drill bit 85 to drill the hole in the concrete protective door where it needs to be drilled. When the drilling is finished, the expansion unit controls the soil trimming cutter 8602 to enlarge the hole drilled by the electric drill bit 85. This eliminates the need for operators to frequently change drill bits, saving manpower and improving drilling efficiency. This solves the problems in the existing technology where drilling involves many steps, which is extremely physically demanding for operators and reduces drilling efficiency. Furthermore, since concrete is composed of cement, water, sand, and gravel, drilling generates dust and stone debris, requiring repeated cleaning after drilling is completed.

[0042] like Figures 3 to 11 As shown, the expansion unit also includes a tool adjustment assembly, a drilling assembly, and a tool closing assembly. The drilling assembly includes a rotary cylinder 7. A rotating rod 23 is fixedly installed at the output end of the rotary cylinder 7. A connecting rod 81 is fixedly installed at one end of the rotating rod 23. One end of the connecting rod 81 is fixedly connected to one end of the electric drill bit 85. The electric drill bit 85 is located in the middle of the interior of one end of the cavity tube 8, and the drill bit end of the electric drill bit 85 is exposed outside the cavity tube 8.

[0043] Since the soil trimming blade 8602 is arranged in a ring, before drilling, the diameter of the hole is determined, and the distance between multiple soil trimming blades 8602 is adjusted by controlling the blade adjusting component, thereby adjusting the diameter of multiple soil trimming blades 8602. This ensures that the diameter of the ring blade holder formed by multiple soil trimming blades 8602 meets the diameter of the hole. When the adjustment is completed, the rotary cylinder 7 is then controlled to drive the connecting rod 81 to rotate through the rotating rod 23. When the connecting rod 81 rotates, it drives the electric drill bit 85 to rotate, thereby starting the electric drill bit 85 and realizing the drilling operation on the concrete protective door.

[0044] like Figures 3 to 4 As shown, a drilling motor 2 is fixedly installed on the top of the support plate 21, and a material receiving ring block 22 is fixedly installed on the outer wall of the rotary cylinder 7. The output end of the drilling motor 2 passes through the inner wall of the cavity tube 8 and is fixedly connected to one side of the material receiving ring block 22. The outer wall of the material receiving ring block 22 is slidably connected to the inner wall of the cavity tube 8.

[0045] When the rotary cylinder 7 drives the electric drill bit 85 to rotate for drilling, the feed motor 2 slowly moves the rotary cylinder 7 within the cavity 8 via the receiving ring block 22. This causes the electric drill bit 85 to slowly extend from the cavity 8 to drill into the concrete protective door. When the electric drill bit 85 finishes drilling the concrete protective door, the drilling assembly and the cutter assembly work together to rotate the annular cutter holder composed of multiple soil trimming cutters 8602. During high-speed rotation, this forms a reaming cutter. The feed motor 2 continues to drive the receiving ring block 22 to slide within the cavity 8, and the reaming cutter formed by the multiple soil trimming cutters 8602 expands the hole drilled by the electric drill bit 85, thus achieving the opening effect.

[0046] like Figures 6 to 9 As shown, the combined blade assembly includes a rotating shaft 83. One end of the rotating shaft 83 has an internal threaded opening 8301 on its inner wall. One end of the connecting rod 81 has a threaded interface 8101. The outer wall of the threaded interface 8101 can be threadedly connected to the inner wall of the internal threaded opening 8301. The rotating shaft 83 is positioned outside the drill bit 85. A blade storage block 86 is fixedly installed at one end of the rotating shaft 83. A hollow disc plate 8604 is fixedly installed inside the blade storage block 86. Multiple soil-breaking blades 8601 are slidably connected inside the blade storage block 86. The tops of the multiple soil-breaking blades 8601 are all... The bottom of multiple soil trimming blades 8602 is fixedly connected to the hollow disc plate 8604. Multiple sliding blade rods 8605 are fixedly installed on the outside of the hollow disc plate 8604. The inner walls of the multiple soil trimming blades 8602 are slidably connected to the inner walls of the multiple sliding blade rods 8605. Multiple return springs 8603 are provided between the inner side of the multiple soil trimming blades 8602 and the outer wall of the hollow disc plate 8604. The multiple return springs 8603 are respectively placed on the outside of the multiple sliding blade rods 8605. The multiple soil trimming blades 8602 and the soil breaking blades 8601 are slidably connected to the inner wall of the blade storage block 86.

[0047] Before use, the soil trimming blade 8602 is pushed by the blade adjusting assembly to pull the return blade spring 8603 to slide on the sliding blade rod 8605. The soil trimming blade 8602 will then move on the blade storage block 86. During the movement, the soil trimming blade 8602 drives the soil breaking blade 8601 to move together. When the blade adjusting assembly stops adjusting, the multiple soil trimming blades 8602 stop moving outward. At this time, the multiple soil trimming blades 8602 and the soil breaking blade 8601 will form a complete cutting tool. When the electric drill bit 85 finishes drilling the hole in the concrete protective door, one end of the connecting rod 81 will rotate into one end of the rotating shaft 83. The threaded interface 8101 on one end of the connecting rod 81 will then be tightened into the inner thread 8301 inside the rotating shaft 83. When the threaded interface 8101 is fully screwed into the inner thread 8301, the connecting rod 8101 will stop moving. 1. The rotating shaft 83 is driven to rotate, which in turn drives the cutting tools formed by the soil trimming blade 8602 and the soil crushing blade 8601 to rotate through the cutting tool storage block 86. The connecting rod 81 is continuously pushed forward by the drilling motor 2, and the cutting tools will enlarge the hole drilled by the electric drill bit 85 through high-speed rotation. During the enlargement, the soil crushing blade 8601 breaks the concrete, and the soil trimming blade 8602 scrapes and repairs the concrete broken by the soil crushing blade 8601, so that the hole is smooth and clean, thus achieving the effect of hole opening. With this method of hole opening, there is no need to change different drill bits, which is more conducive to hole opening operation. The return spring 8603 is set so that when the operation is finished, the return spring 8603 drives the soil trimming blade 8602 and the soil crushing blade 8601 to return to the cutting tool storage block 86.

[0048] like Figures 9 to 10 As shown, a cutter ring 87 is fixedly installed at one end of the cutter storage block 86. Multiple soil-expanding cutters 8702 are fixedly installed on the outer wall of the cutter ring 87. Multiple sliding grooves 8701 are opened on the inner wall of the cutter ring 87. The bottom ends of the multiple soil-breaking cutters 8601 are slidably connected to the inner wall of the multiple sliding grooves 8701 respectively.

[0049] Since the outer end of the cutter block 86 is a conical ring, when the cutter block 86 rotates, it also drives the cutter ring 87 at the bottom of the cutter block 86 to rotate. When the cutter ring 87 rotates, it drives the multiple soil-expanding cutters 8702 on its outside to rotate. When the electric drill bit 85 finishes its operation, the drill motor 2 drives the connecting rod 81 to continue to advance. During the advance, the soil-expanding cutter 8702 on the cutter ring 87 will first approach the hole opening to slightly expand the hole opening. Then, through the advancement of the drill motor 2, the soil-repairing cutter 8602 and the soil-breaking cutter 8601 will further expand and repair the hole, which plays a role in transitioning the hole expansion. This prevents the soil-repairing cutter 8602 and the soil-breaking cutter 8601 from not being able to enter the hole during the hole expansion because the outer end of the cutter block 86 is a conical ring. At the same time, it also avoids the cutter block 86 from friction drilling into the concrete hole when rotating at high speed, which could cause cracking or breakage at the hole opening.

[0050] like Figures 6 to 7As shown, an inner tube 82 is fixedly installed on the inner wall of the cavity tube 8. A limit ring 8204 is fixedly installed on the inner wall of the inner tube 82. A slip ring 8201 is slidably connected to the inner wall of the inner tube 82. Multiple shafts 8203 are fixedly installed on the inner side of the slip ring 8201. An annular groove 8302 is opened on the inner wall of one end of the rotating shaft 83. A plate frame 84 is slidably connected to the inner wall of the annular groove 8302. One end of each of the multiple shafts 8203 passes through the inner wall of the limit ring 8204 and is fixedly connected to one side of the plate frame 84. The outer walls of the multiple shafts 8203 are slidably connected to the inner wall of the limit ring 8204. Multiple return springs 8202 are provided between the slip ring 8201 and the limit ring 8204. The multiple return springs 8202 are respectively placed outside the multiple shafts 8203. The outer wall of the plate frame 84 is slidably connected to the inner wall of the inner tube 82.

[0051] When the drilling motor 2 drives the rotating shaft 83 to continuously advance through the connecting rod 81, the rotating shaft 83 pulls the slip ring 8201 to slide inside the inner tube 82 through the plate frame 84. When sliding, the slip ring 8201 squeezes the return spring 8202 to slide. When the drilling operation ends, the rotating cylinder 7 drives the connecting rod 81 to reverse, and the drilling motor 2 drives the rotating cylinder 7 and the connecting rod 81 to return to their original positions. The screw interface 8101 will then rotate out from the inner threaded port 8301, thereby driving the drill bit 85 to retract into the cavity tube 8. At the same time, the rotating shaft 83 is reset under the elastic force of the return spring 8202, which prevents the rotating shaft 83 from losing power and failing to reset when the screw interface 8101 rotates out from the inner threaded port 8301, thus playing the role of resetting the rotating shaft 83.

[0052] like Figures 6 to 9 As shown, the blade adjusting assembly includes a blade pressing block 1201, which is slidably disposed inside the cavity tube 8. The outer wall of the blade pressing block 1201 is slidably connected to the top of a plurality of soil trimming blades 8602. An annular plate 12 is fixedly installed on the outer wall of the blade pressing block 1201. A plurality of through slots 8303 are opened on the inner wall of the rotating shaft 83. The inner rod of the annular plate 12 is slidably connected to the inner wall of the plurality of through slots 8303. A ring motor 10 is fixedly installed on the outer wall of the inner tube 82. A rod holder plate 11 is fixedly installed on the output end of the ring motor 10. One end of the rod holder plate 11 is rotatably connected to the inner wall of the annular plate 12.

[0053] When the required hole diameter is determined, the ring motor 10 drives the ring plate 12 to slide on the rotating shaft 83. When the ring plate 12 slides, it drives the pressure block 1201 to squeeze the inner wall of multiple soil trimming blades 8602, thereby pushing the multiple soil trimming blades 8602 and soil breaking blades 8601 to move outward, thereby adjusting the distance between the multiple soil trimming blades 8602 and soil breaking blades 8601 so that the distance between them is the same as the hole diameter, which plays the role of adjusting the blade diameter.

[0054] like Figures 3 to 5As shown, the dust removal unit also includes an exhaust fan block 93, which is fixedly installed on the outside of the ring plate 12. A water injector 9 is fixedly installed on the outer wall of the cavity tube 8. The water injector 9 is located outside the ring motor 10. An annular shell 5 is fixedly installed on the outer wall of the water injector 9. A sprayer 91 is fixedly installed on the inner wall of the annular shell 5. A water flow pipe 92 is fixedly installed between the sprayer 91 and the water injector 9. A slag baffle 94 is fixedly installed at one end of the annular shell 5. The slag baffle 94 is fixedly installed at one end of the cavity tube 8. The inner side of the exhaust fan block 93 is a curved fan blade, and the outer side is a flat surface. During operation, gas is drawn in from the outside.

[0055] When the rotating shaft 83 rotates, the inner rod of the annular plate 12 will also drive the annular plate 12 to rotate. When the annular plate 12 rotates, it will drive multiple exhaust fan blocks 93 to rotate. When the multiple exhaust fan blocks 93 rotate, they will generate airflow. The inner side of the exhaust fan block 93 is a curved fan blade, and the outer side is a flat surface. When airflow is generated, airflow can be drawn in from the outside. Thus, when drilling a hole in the concrete protective door, the rotation of the exhaust fan block 93 will continuously draw air out of the hole, thereby drawing the smoke and dust generated during the drilling into the annular shell 5. When the smoke and dust enter the annular shell 5, the water injector 9 injects water into the sprayer 91 through the water pipe 92. The water injector 9 sprays the injected water out. The water mist sprayed by the exhaust fan block 93 will come into contact with the smoke and dust drawn in by the exhaust fan block 93, thereby eliminating the smoke and dust generated during the drilling and playing a role in smoke removal.

[0056] like Figures 3 to 5 As shown, a cleaning plate water box 6 is fixedly installed on the top of the ring shell 5, a water sliding port 61 is opened on the inner wall of the upper surface of the ring shell 5, a leakage groove is opened on the lower surface of the ring shell 5, and a water sliding plate is provided on the inner side of the water injector 9.

[0057] When the sprayer 91 sprays water mist, the airflow generated by the exhaust fan 93 blows the water mist onto the water skid plate. Simultaneously, the drawn-in smoke and dust are also blown onto the water skid plate by the airflow. When the smoke and dust come into contact with the water on the water skid plate, the water cools the high-temperature smoke and absorbs particulate matter, thereby reducing the smoke temperature and decreasing the diffusion of harmful substances, thus achieving a smoke removal effect. The deposited impurities are then adsorbed onto the water skid plate. When there is too much water on the water skid plate, water is poured into the cleaning water box 6, and the water flows down from the top of the water skid plate along the water skid inlet 61, eventually flowing out from the drain at the bottom of the ring shell 5, thus cleaning the water skid plate.

[0058] like Figures 1 to 12As shown, a positioning block 3 is fixedly installed on the top of the positioning box 1. The positioning block 3 and the center of the support plate 21 are at the same level. An adjustment motor 31 is fixedly installed on one side of the positioning block 3. A sliding shaft 32 is fixedly installed on the inner wall of the positioning block 3. A mounting plate 43 is provided at the bottom of the sliding shaft 32. One end of the mounting plate 43 is fixedly connected to the other side of the positioning block 3. A telescopic rod 42 is movably connected to the outer wall of the sliding shaft 32. A slag collection box 4 is fixedly installed on one end of the telescopic rod 42 and on one side of the top of the support plate 21. A hollow shaft 33 is fixedly installed at the output end of the adjustment motor 31. One end of the hollow shaft 33 is fixedly connected to one side of the sliding end of the telescopic rod 42. A drawer 41 is provided inside the slag collection box 4 located on one side of the top of the support plate 21. The drawer 41 is located directly below one end of the ring shell 5.

[0059] Before operation, the concrete protective door is erected, and one side of the door is placed inside the positioning block 3. The position adjustment box 1 is then controlled to adjust the position so that the expansion unit is level with the center of the opening. Once the adjustment is complete, the adjustment motor 31 is then controlled to drive the telescopic rod 42 to slide on the sliding shaft 32 via the hollow shaft 33. When the slag collection box 4 at one end of the telescopic rod 42 contacts one side of the concrete protective door, the adjustment motor 31 stops operating. At this point, the two slag collection boxes 4 will be positioned on either side of the opening of the concrete protective door, facilitating the opening operation of the expansion unit. Two slag collection boxes 4 collect the soil and slag coming out of the opening, preventing the soil and slag from falling to the ground and requiring subsequent cleaning. When the soil and slag in the two slag collection boxes 4 are full, water will be generated inside one of the slag collection boxes 4 during the slag collection process. By pushing the telescopic rod 42 to rotate on the sliding shaft 32, the soil and slag in the dry slag collection box 4 can be poured out. By pulling the drawer 41 out of the damp slag collection box 4, the soil and slag collected inside can be removed. It should be noted that the side of the support plate 21 on which the slag collection box 4 is installed is on the same horizontal line as the inner wall of the positioning block 3.

[0060] Working principle: In use, the concrete protective door is placed vertically, and then the position adjustment box 1 is controlled to adjust the expansion unit to be level with the center of the opening. When the adjustment is complete, the expansion unit in the control chamber 8 drives the electric drill bit 85 to drill a hole at the required opening location on the concrete protective door. When drilling is finished, the expansion unit continues to drive the soil trimming blade 8602 to enlarge the hole drilled by the electric drill bit 85. While the expansion unit is working, the ash removal unit works in conjunction with it, so that the expansion unit can effectively enlarge the concrete protective door. During the opening operation of the protective door, the dust removal unit collects and treats the smoke and stones drilled out by the expansion unit, saving the need to clean up the stone debris and dust after the opening operation is completed, reducing the waste of manpower. The expansion unit first drives the electric drill bit 85 to drill the hole where the concrete protective door needs to be opened. When the drilling is finished, the expansion unit controls the soil trimming cutter 8602 to expand the hole drilled by the electric drill bit 85. There is no need for operators to frequently change drill bits, saving manpower and improving the opening efficiency.

[0061] Before drilling, the diameter of the hole is determined, and the distance between multiple soil trimming blades 8602 is adjusted by controlling the blade adjusting assembly, thereby adjusting the diameter of the multiple soil trimming blades 8602 so that the diameter of the annular blade holder formed by the multiple soil trimming blades 8602 can meet the diameter of the hole. When the adjustment is completed, the rotary cylinder 7 is then controlled to drive the connecting rod 81 to rotate through the rotating rod 23. When the connecting rod 81 rotates, it drives the electric drill bit 85 to rotate, thereby starting the electric drill bit 85 and realizing the drilling operation of the concrete protective door.

[0062] When the rotary cylinder 7 drives the electric drill bit 85 to rotate and perform drilling operations, the drilling motor 2 slowly drives the rotary cylinder 7 to move within the cavity tube 8 through the receiving ring block 22, thereby driving the electric drill bit 85 to slowly extend from the cavity tube 8 to drill a hole in the concrete protective door. When the electric drill bit 85 finishes drilling the concrete protective door, the drilling assembly and the cutter assembly work together to drive the ring cutter holder composed of multiple soil trimming cutters 8602 to rotate. During rotation, the high-speed rotation forms a hole-reaming cutter. The drilling motor 2 continues to drive the receiving ring block 22 to slide within the cavity tube 8, and the hole-reaming cutter formed by the multiple soil trimming cutters 8602 will expand the hole drilled by the electric drill bit 85, thereby achieving the effect of opening a hole.

[0063] The adjusting assembly pushes the soil trimming blade 8602, pulling the return blade spring 8603 to slide on the sliding blade rod 8605. The soil trimming blade 8602 then moves on the blade storage block 86. During this movement, the soil trimming blade 8602 drives the soil breaking blade 8601 to move together. When the adjusting assembly stops adjusting, the multiple soil trimming blades 8602 stop moving outwards. At this point, the multiple soil trimming blades 8602 and the soil breaking blade 8601 together form a complete cutting tool. When the electric drill bit 85 completes drilling into the concrete protective door, one end of the connecting rod 81 rotates into one end of the rotating shaft 83, and the threaded interface 8101 on one end of the connecting rod 81 tightens into the internal thread 8301 inside the rotating shaft 83. When the threaded interface 8101 is fully screwed into the internal thread 8301, the connecting rod 81 drives the rotating shaft 83 to rotate, which in turn drives the cutting tools formed by the soil trimming blade 8602 and the soil breaking blade 8601 to rotate through the blade storage block 86. The connecting rod 81 is continuously pushed forward by the drilling motor 2, and the cutting tools will enlarge the hole drilled by the electric drill bit 85 through high-speed rotation. During the enlargement, the soil breaking blade 8601 breaks the concrete, and the soil trimming blade 8602 scrapes and repairs the concrete broken by the soil breaking blade 8601, so that the hole at the opening is smooth and clean, thus achieving the effect of opening the hole. With this method of opening the hole, there is no need to change different drill bits, which is more conducive to the opening operation.

[0064] When the cutter block 86 rotates, it also drives the cutter ring 87 at the bottom of the cutter block 86 to rotate. When the cutter ring 87 rotates, it drives the multiple soil-expanding cutters 8702 on its outside to rotate. When the electric drill bit 85 finishes its operation, the drill motor 2 drives the connecting rod 81 to continue to advance. During the advance, the soil-expanding cutters 8702 on the cutter ring 87 will first approach the hole opening to slightly expand the hole opening. Then, through the advancement of the drill motor 2, the soil-repairing cutter 8602 and the soil-breaking cutter 8601 will further expand and repair the hole, which plays the role of transitional hole expansion. This prevents the soil-repairing cutter 8602 and the soil-breaking cutter 8601 from entering the hole during hole expansion because the outer end of the cutter block 86 is a conical ring. At the same time, it also prevents the cutter block 86 from frictionally drilling into the concrete hole when rotating at high speed, which could cause cracking or breakage at the hole opening.

[0065] When the drilling motor 2 drives the rotating shaft 83 to continuously advance through the connecting rod 81, the rotating shaft 83 pulls the slip ring 8201 to slide inside the inner tube 82 through the plate frame 84. When sliding, the slip ring 8201 squeezes the return spring 8202 to slide. When the drilling operation ends, the rotating cylinder 7 drives the connecting rod 81 to reverse, and the drilling motor 2 drives the rotating cylinder 7 and the connecting rod 81 to return to their original positions. The screw interface 8101 will then rotate out from the inner threaded port 8301, thereby driving the drill bit 85 to retract into the cavity tube 8. At the same time, the rotating shaft 83 is reset under the elastic force of the return spring 8202, which prevents the rotating shaft 83 from losing power and failing to reset when the screw interface 8101 rotates out from the inner threaded port 8301, thus playing the role of resetting the rotating shaft 83.

[0066] By controlling the ring motor 10 to drive the ring plate 12 to slide on the rotating shaft 83, the ring plate 12 slides and drives the pressing block 1201 to squeeze the inner wall of multiple soil trimming blades 8602, thereby pushing the multiple soil trimming blades 8602 and soil breaking blades 8601 to move outward, thereby adjusting the distance between the multiple soil trimming blades 8602 and soil breaking blades 8601 so that the distance between them is the same as the diameter of the opening, thus playing the role of adjusting the blade diameter;

[0067] The inner rod of the ring plate 12 will also drive the ring plate 12 to rotate. When the ring plate 12 rotates, it will drive multiple exhaust fan blocks 93 to rotate. When the multiple exhaust fan blocks 93 rotate, they will generate airflow. The inner side of the exhaust fan block 93 is a curved fan blade, and the outer side is a flat surface. When airflow is generated, airflow can be drawn in from the outside. Thus, when making a hole in the concrete protective door, the exhaust fan block 93 will continuously draw air from the hole, thereby drawing the smoke and dust generated by the hole into the ring shell 5. When the smoke and dust enter the ring shell 5, the water injector 9 injects water into the sprayer 91 through the water pipe 92. The water injector 9 sprays the injected water. The water mist sprayed by the exhaust fan block 93 will come into contact with the smoke and dust drawn in by the exhaust fan block 93, thereby eliminating the smoke and dust generated by the hole and playing a role in smoke removal.

[0068] When the sprayer 91 sprays water mist, the airflow generated by the exhaust fan block 93 blows the water mist onto the water skid plate. The smoke and dust drawn in are also blown onto the water skid plate by the airflow. When the smoke and dust come into contact with the water on the water skid plate, the water cools the high-temperature smoke and absorbs the particulate matter in the smoke, thereby reducing the temperature of the smoke and reducing the diffusion of harmful substances, thus achieving the effect of smoke removal. The sedimented impurities are adsorbed onto the water skid plate. When there is too much water on the water skid plate, water is poured in from the cleaning plate water box 6. The water will flow down from the top of the water skid plate along the water skid port 61 and finally flow out from the drain at the bottom of the ring shell 5, thereby cleaning the water skid plate.

[0069] By erecting the concrete protective door and placing one side of the door inside the positioning block 3, the position adjustment box 1 is controlled to adjust the position so that the expansion unit is level with the center of the opening. When the adjustment is complete, the adjustment motor 31 is then controlled to drive the telescopic rod 42 to slide on the sliding shaft 32 via the hollow shaft 33. When the slag collection box 4 at one end of the telescopic rod 42 contacts one side of the concrete protective door, the adjustment motor 31 stops operating. At this time, the two slag collection boxes 4 will be placed on both sides of the opening of the concrete protective door, so that when the expansion unit performs the opening operation, the two slag collection boxes 4 can collect the soil and slag coming out of the opening, preventing the soil and slag from falling to the ground and requiring subsequent cleaning. When the soil and slag in the two slag collection boxes 4 are full, water will be generated inside one of the slag collection boxes 4 during the slag collection. By pushing the telescopic rod 42 to rotate on the sliding shaft 32, the soil and slag in the dry slag collection box 4 can be poured out. By pulling the drawer 41 out of the wet slag collection box 4, the soil and slag collected inside can be removed.

[0070] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A concrete protective door drilling machine, characterized in that: The device includes a support plate, with a calibration box fixedly installed at the bottom. The calibration box contains an adjustment mechanism for adjusting the position of the device so that it aligns with the location on the concrete protective door where an opening is needed. A cavity tube is fixedly installed at the top of the support plate, and an expansion unit is installed inside the cavity tube. The expansion unit includes multiple soil trimming blades and is used to adjust and drive soil trimming blades of different diameters to make openings on the concrete protective door. An electric drill bit is installed in the middle of the cavity tube and is placed inside the expansion unit. A dust removal unit is installed outside one end of the cavity tube. The dust removal unit includes a sprayer and is used to collect and treat the dust and stones drilled out during the opening operation of the expansion unit on the concrete protective door. The cutter assembly includes a rotating shaft with an internal threaded opening on the inner wall of one end and a threaded interface on one end of a connecting rod. The outer wall of the threaded interface can be threadedly connected to the inner wall of the internal threaded opening. The rotating shaft is located outside the drill bit. A cutter storage block is fixedly installed at one end of the rotating shaft. A hollow disc is fixedly installed inside the cutter storage block. Multiple soil-breaking blades are slidably connected inside the cutter storage block. The tops of the multiple soil-breaking blades are fixedly connected to the bottoms of multiple soil-trimming blades. Multiple sliding blade rods are fixedly installed outside the hollow disc. The inner walls of the multiple soil-trimming blades are slidably connected to the inner walls of the multiple sliding blade rods. Multiple return springs are provided between the inner sides of the multiple soil-trimming blades and the outer wall of the hollow disc. The multiple return springs are located outside the multiple sliding blade rods. The multiple soil-trimming blades and soil-breaking blades are slidably connected to the inner wall of the cutter storage block.

2. The concrete protective door drilling machine according to claim 1, characterized in that: The expansion unit also includes a tool adjustment assembly, a drilling assembly, and a tool closing assembly. The drilling assembly includes a rotary cylinder, with a rotating rod fixedly installed at the output end of the rotary cylinder. A connecting rod is fixedly installed at one end of the rotating rod, and one end of the connecting rod is fixedly connected to one end of the electric drill bit. The electric drill bit is placed in the middle of the interior of one end of the cavity tube, with the drill bit end of the electric drill bit exposed outside the cavity tube.

3. The concrete protective door drilling machine according to claim 2, characterized in that: A drilling motor is fixedly installed on the top of the support plate, and a material receiving ring is fixedly installed on the outer wall of the rotary cylinder. The output end of the drilling motor passes through the inner wall of the cavity tube and is fixedly connected to one side of the material receiving ring. The outer wall of the material receiving ring is slidably connected to the inner wall of the cavity tube.

4. The concrete protective door drilling machine according to claim 3, characterized in that: A cutter ring is fixedly installed at one end of the cutter storage block. Multiple soil-expanding cutters are fixedly installed on the outer wall of the cutter ring. Multiple sliding grooves are opened on the inner wall of the cutter ring. The bottom ends of the multiple soil-breaking cutters are slidably connected to the inner walls of the multiple sliding grooves.

5. A concrete protective door drilling machine according to claim 4, characterized in that: An inner tube is fixedly installed on the inner wall of the cavity tube. A limit ring is fixedly installed on the inner wall of the inner tube. A slip ring is slidably connected to the inner wall of the inner tube. Multiple shafts are fixedly installed on the inner side of the slip ring. A ring groove is opened on the inner wall of one end of the rotating shaft. A plate frame is slidably connected to the inner wall of the ring groove. One end of each of the multiple shafts passes through the inner wall of the limit ring and is fixedly connected to one side of the plate frame. The outer walls of the multiple shafts are slidably connected to the inner wall of the limit ring. Multiple return springs are set between the slip ring and the limit ring. The multiple return springs are respectively placed outside the multiple shafts. The outer wall of the plate frame is slidably connected to the inner wall of the inner tube.

6. A concrete protective door drilling machine according to claim 5, characterized in that: The blade adjusting assembly includes a blade pressing block, which is slidably disposed inside the cavity tube. The outer wall of the blade pressing block is slidably connected to the top of multiple soil trimming blades. An annular plate is fixedly installed on the outer wall of the blade pressing block. Multiple through slots are opened on the inner wall of the rotating shaft. The inner rod of the annular plate is slidably connected to the inner wall of the multiple through slots. A ring motor is fixedly installed on the outer wall of the inner tube. A rod holder plate is fixedly installed on the output end of the ring motor. One end of the rod holder plate is rotatably connected to the inner wall of the annular plate.

7. A concrete protective door drilling machine according to claim 6, characterized in that: The dust removal unit also includes an exhaust fan block, which is fixedly installed on the outside of the ring plate. A water injector is fixedly installed on the outer wall of the cavity tube. The water injector is located outside the ring motor. An annular shell is fixedly installed on the outer wall of the water injector. A sprayer is fixedly installed on the inner wall of the annular shell. A water flow pipe is fixedly installed between the sprayer and the water injector. A slag baffle is fixedly installed at one end of the annular shell. The slag baffle is fixedly installed at one end of the cavity tube. The inner side of the exhaust fan block is a curved fan blade, and the outer side is a flat surface. During operation, gas is drawn in from the outside to the inside.

8. A concrete protective door drilling machine according to claim 7, characterized in that: A cleaning plate water box is fixedly installed on the top of the ring shell. A water-sliding port is opened on the inner wall of the upper surface of the ring shell, and a leakage groove is opened on the lower surface of the ring shell. A water-sliding plate is provided on the inner side of the water injector.

9. A concrete protective door drilling machine according to claim 8, characterized in that: A positioning block is fixedly installed on the top of the positioning box. The positioning block and the center of the support plate are at the same level. An adjustment motor is fixedly installed on one side of the positioning block. A sliding shaft is fixedly installed on the inner wall of the positioning block. A mounting plate is set at the bottom of the sliding shaft. One end of the mounting plate is fixedly connected to the other side of the positioning block. A telescopic rod is movably connected to the outer wall of the sliding shaft. A slag collection box is fixedly installed on one end of the telescopic rod and on one side of the top of the support plate. A hollow shaft is fixedly installed at the output end of the adjustment motor. One end of the hollow shaft is fixedly connected to one side of the sliding end of the telescopic rod. The slag collection box located on one side of the top of the support plate has a drawer inside. The drawer is located directly below one end of the ring shell.

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