A pipe opening electric drill

Abstract

The application discloses a pipeline opening electric drill, which comprises a machine body, clamping devices are installed on the front and rear sides of the machine body, a driving device is matched between the machine body and the clamping devices, under the action of the driving device, the clamping devices on both sides move towards the machine body or move away from the machine body, a support is arranged on the top of the machine body, a sliding table is slidingly matched through the support, a motor is installed on the top of the sliding table, a rotating shaft is installed at the output end of the motor, a cutter head structure is matched downward through the machine body, a base is installed on the other side of the support, an electric push rod is installed through the base, and the electric push rod is matched with the sliding table.

Description

Technical Field

[0001] This invention relates to an electric drill for drilling pipes. Background Technology

[0002] Drilling refers to the operation of creating a hole in a solid material using a drill bit; a drilling machine is a general term for machinery and equipment that uses a tool that is harder and sharper than the target object to leave a cylindrical hole or cavity in the target object through rotary cutting or rotary extrusion.

[0003] There are two types of pipe openings: one is to open the pipe in the factory before the pipe is installed, and the other is to dig the pipe again after the pipe is installed for branching and transfer.

[0004] For the second scenario, the existing method is to manually drill a hole with a handheld electric drill, and then manually enlarge the hole. However, in practice, the manual operation of the drill bit results in a large error in the entry angle of the drill bit, leading to a large deviation in the position of the obtained hole. This makes sealing more difficult when connecting the manifold later, and increases the chance of leakage later.

[0005] Secondly, this type of drilling can only be performed on a single hole. When multiple holes need to be drilled in the same row, the drill bit position and drilling angle need to be repeatedly calibrated, resulting in significant variations.

[0006] Based on the above problems, we designed a pipe drilling electric drill that can be clamped to the outside of the pipe to achieve drilling positioning and can also achieve rapid displacement through sliding. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a pipe drilling electric drill that can be clamped on the outside of the pipe to achieve drilling positioning and can also achieve rapid displacement through sliding.

[0008] To solve the above problems, the present invention adopts the following technical solution:

[0009] A pipe drilling drill includes a body with clamping devices mounted on the front and rear sides. A drive device is connected between the body and the clamping devices. Under the action of the drive device, the clamping devices on both sides move simultaneously toward the body or away from the body. A bracket is provided on the top of the body, and a slide is slidably connected to the bracket. A motor is mounted on the top of the slide, and a rotating shaft is mounted on the output end of the motor. The rotating shaft passes downward through the body and is connected to a cutting head structure. A base is mounted on the other side of the bracket, and an electric push rod is mounted on the base, which is connected to the slide.

[0010] Preferably, the machine body includes a main body with a through front and rear side. A cover plate is detachably installed on the front and rear sides of the main body. Two sleeves are installed at the bottom inner part of the main body, and a guide rod is fixedly installed through the sleeves. The guide rod extends outward after passing through the cover plate. The clamping device is guided by sliding through the guide rod. Wheel seats are provided at the left and right ends of the bottom of the main body. Guide wheels are rotated and engaged through the wheel seats. When the electric push rod is in the retracted state and the guide wheel acts on the outer wall of the pipe being drilled, the cutter head structure maintains a distance from the pipe being drilled.

[0011] Preferably, the driving device includes a worm, a worm wheel, and a rotating shaft. The worm meshes with the worm wheel, the rotating shaft passes through the worm wheel, and both ends of the rotating shaft extend outward after passing through the cover plate. The rotating shaft is rotatably engaged with the cover plates on both sides. Both ends of the rotating shaft are provided with threaded portions with opposite directions of rotation. The worm is rotatably connected to the body, and the upper end of the worm passes through the body and is fitted with a handle. The threaded portion is engaged with the clamping device.

[0012] Preferably, the clamping device includes a slide rod, with two or more axles vertically inserted at the bottom of the slide rod. The axles are rotatably engaged with the slide rod, and a wheel is mounted on the axle. An annular groove is provided on the outer wall of the wheel, which acts on the outer wall of the pipe being processed through the annular groove. The slide rod has a guide hole through the guide rod, and the slide rod is equipped with a buffer tensioner, which is driven by the threaded portion.

[0013] Preferably, the buffer tensioner includes a U-shaped component, the slide rod is fitted inside the U-shaped component and slides along the slide rod, a threaded sleeve is installed on the top of the U-shaped component and the threaded portion fits into the threaded sleeve, a push plate is provided inside the U-shaped component to act on the slide rod, a first guide rod is provided at the end of the push plate away from the slide rod and passes through the U-shaped component, a spring is fixed at the end of the push plate away from the slide rod and acts on the inner end face of the push plate, and a stop is provided at the opening of the U-shaped component to prevent the slide rod from dislodging.

[0014] Preferably, the bracket has a lateral through guide groove, and on the left end face of the bracket, limit grooves are provided on both sides of the guide groove, the limit grooves being parallel to the guide groove. The front and rear sides of the slide table are provided with slots that fit the guide groove, the slide table has a limit strip that matches the limit groove, the limit strip sliding vertically along the limit groove, and the base is installed on the rear end face of the bracket near the top.

[0015] Preferably, an inner pipe is provided inside the main body, and a water inlet pipe is provided on the outer wall of the inner pipe. The water inlet pipe passes through the right end face of the main body and is fitted with a valve. The rotating shaft is coaxial with the inner pipe. Through holes for the rotating shaft are provided at the upper and lower ends of the main body. The rotating shaft and the through holes are clearance fit. A sealing plate is provided inside the inner pipe. The rotating shaft passes through the sealing plate. The sealing plate is located above the water inlet pipe. A sealing ring is fitted on the outer wall of the sealing plate. The sealing ring and the inner wall of the inner pipe form a seal. A bearing and a shaft seal are fitted between the rotating shaft and the sealing plate. The shaft seal is located below the bearing. At the bottom of the main body, multiple water spray holes are distributed in a ring outside the through holes. Water discharged from the gap between the lower through holes and the rotating shaft acts on the top of the cutter head structure. Water sprayed from the water spray holes acts on the outside of the cutter head structure. During the up and down movement of the rotating shaft, the sealing plate is always located above the water inlet pipe.

[0016] Preferably, the rotating shaft is provided with a spiral blade, which is located inside the inner pipe and below the sealing plate. The lower end of the spiral blade is kept at a distance from the inner bottom surface of the body. When the rotating shaft descends to the limit position, the spiral blade does not contact the inner bottom surface of the body.

[0017] Preferably, the cutter head structure includes a cylindrical cutter body with teeth machined at the bottom. A partition is provided inside the cutter body, and a groove is formed above the partition. Drain holes are distributed in a ring on the surface of the partition. Water leaking from the lower through-hole enters the groove and then enters the inner side of the cutter body through the drain holes. The rotating shaft is connected to the partition, and water discharged from the spray hole is located on the outer side of the cutter body. A drill bit is provided at the bottom axis of the partition. The drill bit is coaxial with the rotating shaft, and the lower end of the drill bit extends to the outside of the cutter body.

[0018] Preferably, an inner housing is provided inside the main body, the worm gear and worm are located inside the inner housing, and a lubrication hole is drilled on the top of the main body, the lubrication hole corresponding to the inside of the inner housing and the worm gear.

[0019] The beneficial effects of this invention are:

[0020] Firstly, this device achieves positioning with the pipe being processed through clamping devices on both sides. The two clamping devices are located on the same diameter line of the pipe being processed, and the cutting head structure is set vertically. Therefore, the cutting head structure is also located on the diameter line of the pipe, resulting in a correct drilling angle and avoiding deviations.

[0021] Secondly, in this device, the clamping device can move along the axial direction of the pipe being processed. When multiple holes need to be drilled simultaneously, the movement of the clamping device can drive the machine body to move, achieving continuous and rapid drilling. This eliminates the need to repeatedly determine the drilling angle, making the drilling process more efficient.

[0022] Thirdly, this equipment has a small size and structure, and can be transported into the channel after the channel is excavated to directly adapt to the pipeline, making it simple and convenient to operate. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the device;

[0026] Figure 3 This is a sectional view of the organism;

[0027] Figure 4 for Figure 2 Enlarge the image at point A;

[0028] Figure 5 This is a 3D view of the push plate;

[0029] Figure 6 for Figure 2 Enlarged view at point B;

[0030] Figure 7 for Figure 2 Enlarge the image at point C;

[0031] Figure 8 for Figure 3 Enlarge the image at point D;

[0032] Figure 9 for Figure 3 Enlarge the image at point E. Detailed Implementation

[0033] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.

[0034] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0035] In the description of this invention, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0036] Furthermore, in the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] See Figure 1 The illustrated pipe drilling drill includes a body 1, with clamping devices 2 installed on the front and rear sides of the body 1. A drive device 3 is connected between the body 1 and the clamping devices 2. Under the action of the drive device 3, the clamping devices 2 on both sides move simultaneously toward the body 1 or away from the body 1. A bracket 4 is provided on the top of the body 1, and a slide table 41 is slidably connected to the bracket 4. A motor 42 is installed on the top of the slide table 41, and a rotating shaft 43 is installed at the output end of the motor 42. The rotating shaft 43 passes downward through the body 1 and is connected to a cutting head structure 5. A base 6 is installed on the other side of the bracket 4, and an electric push rod 7 is installed through the base 6. The electric push rod 7 is connected to the slide table 41.

[0039] In the above technical solution, clamping device 2 is used to clamp the pipe to be drilled. After clamping, clamping device 2 can slide along the axial direction of the pipe. When multiple parallel holes need to be drilled at the same time, the drilling position can be adjusted by simply moving clamping device 2.

[0040] In the above technical solution, the spacing of the clamping devices 2 at both ends is adjustable, which can meet the clamping needs of pipes with different diameters. In actual operation, the clamping devices 2 at both ends need to be on the same diameter line of the pipe being drilled.

[0041] The slide table 41 is controlled to move up and down by the electric push rod 7, and the drilling work on the surface of the pipe is completed by the downward movement of the cutter head structure 5.

[0042] See Figure 2 and Figure 3 As shown, the machine body 1 includes a main body 101, which is connected to the front and rear sides. A cover plate 102 is detachably installed on the front and rear sides of the main body 101. Two sleeves 103 are installed at the inner bottom of the main body 101. A guide rod 104 is fixedly installed through the sleeves 103. The guide rod 104 extends outward after passing through the cover plate 102. The clamping device 2 is guided by the guide rod 104. Wheel seats 190 are provided at the left and right ends of the bottom of the main body 101. Guide wheels 191 are rotatably engaged through the wheel seats 190. When the electric push rod 7 is in the retracted state and the guide wheel 191 acts on the outer wall of the pipe being drilled, the cutter head structure 5 maintains a distance from the pipe being drilled.

[0043] In the above technical solution, the guide wheel 191 acts on the surface of the pipe being perforated, so as to avoid the cutter head structure 5 scratching the surface of the pipe during the sliding of the machine body 1.

[0044] See Figure 2 , Figure 3 and Figure 4 As shown, the driving device 3 includes a worm 301, a worm wheel 302, and a rotating shaft 303. The worm 301 meshes with the worm wheel 302. The rotating shaft 303 passes through the worm wheel 302. Both ends of the rotating shaft 303 pass through the cover plate 102 and extend outward. The rotating shaft 303 is rotatably engaged with the cover plates 102 on both sides. Both ends of the rotating shaft 303 are provided with threaded portions 304 with opposite directions of rotation. The worm 301 is rotatably connected to the body 101. The upper end of the worm 301 passes through the body 101 and is engaged with a handle 305. The threaded portion 304 is engaged with the clamping device 2.

[0045] The transmission system employs a worm gear and worm shaft combination, which ensures stable transmission and precise transmission ratio. The worm shaft 301 rotates easily, and the rotation of the worm gear 302 drives the rotating shaft 303 to rotate. The threaded part 304 drives the clamping devices 2 on both sides to move, thereby clamping or releasing the pipeline.

[0046] See Figure 1 and Figure 2As shown, the clamping device 2 includes a slide rod 201, with two or more axles 202 vertically inserted at the bottom of the slide rod 201. The axles 202 are rotatably engaged with the slide rod 201. A wheel body 203 is mounted on the axle 202, and an annular groove 204 is provided on the outer wall of the wheel body 203. The annular groove 204 acts on the outer wall of the pipe being processed. The slide rod 201 has a guide hole 205 that passes through the guide rod 104. The slide rod 201 is engaged with a buffer tensioner 8, which is driven by the threaded portion 304.

[0047] In the above technical solution, the axle 202 is rotatable, which facilitates the wheel 203 to roll along the outer wall of the pipe being processed, thereby realizing the position adjustment of the machine body 1. The annular groove 204 is used for positioning, which increases the contact area between the wheel 203 and the pipe being processed, making the position of the machine body more stable. Secondly, when the cutter head structure moves downward, it will give the machine body 1 an upward force, and the position of the machine body 1 can be locked through the annular groove 204.

[0048] See Figure 2 , Figure 4 and Figure 5 As shown, the buffer tensioner 8 includes a U-shaped component 801, a slide rod 201 that fits inside the U-shaped component 801 and slides along the slide rod 201, a threaded sleeve 802 that is installed on the top of the U-shaped component 801 and the threaded portion 304 that fits the threaded sleeve 802, a push plate 803 that acts on the slide rod 201 is provided inside the U-shaped component 801, a first guide rod 804 is provided at the end of the push plate 803 away from the slide rod 201 and passes through the U-shaped component 801, a spring 805 is fixed at the end of the push plate 803 away from the slide rod 201 and acts on the inner end face of the push plate 803, and a stop block 806 that prevents the slide rod 201 from dislodging is provided at the opening of the U-shaped component 801.

[0049] The technical effect of the above-mentioned technical solution is to provide a buffered clamping force to avoid damage to the pipe caused by sudden excessive tightening, especially PVC pipes, which will deform after being excessively clamped.

[0050] In the above technical solution, the U-shaped part 801 cooperates with the slide rod 201. When the rotating shaft 303 rotates, the U-shaped part 801 is driven to move towards the machine body 1. At this time, the push plate 803 acts on the slide rod 201. As the rotating shaft continues to rotate, the push plate 803 pushes the slide rod 201 until the wheel body 203 contacts the pipe being processed. At this time, the U-shaped part 801 is tightened, so that the push plate 803 compresses the spring, which further provides clamping force while also providing a buffer to avoid pipe deformation caused by sudden tightening.

[0051] See Figure 6 and Figure 7 As shown, the bracket 4 has a lateral through guide groove 401. On the left end face of the bracket 4, limit grooves 402 are provided on both sides of the guide groove 401. The limit grooves 402 are parallel to the guide groove 401. The front and rear sides of the slide table 41 are provided with slots 403 that fit the guide groove 401. The slide table 41 has a limit strip 404 that cooperates with the limit groove 402. The limit strip 404 slides vertically along the limit groove 402. The base 6 is installed on the rear end face of the bracket 4 near the top.

[0052] The limiting groove 402 serves to orient the slide table 41, ensuring that the slide table 41 can only slide vertically.

[0053] See Figure 2 , Figure 3 , Figure 8 and Figure 9 As shown, an inner pipe 9 is provided inside the main body 101, and a water inlet pipe 901 is provided on the outer wall of the inner pipe 9. The water inlet pipe 901 passes through the right end face of the main body 101 and is fitted with a valve 902. The rotating shaft 43 is coaxial with the inner pipe 9. Through holes 121 for passing through the rotating shaft 43 are provided at the upper and lower ends of the main body 101. The rotating shaft 43 is clearance-fitted with the through holes 121. A sealing plate 903 is provided inside the inner pipe 9, and the rotating shaft 43 passes through the sealing plate 903. The sealing plate 903 is located above the water inlet pipe 901, and a sealing ring 9 is fitted on the outer wall of the sealing plate 903. 04. The sealing ring 904 forms a seal with the inner wall of the inner pipe 9. The rotating shaft 43 and the sealing plate 903 are fitted with a bearing 905 and a shaft seal 906. The shaft seal 906 seals the area below the bearing 905. At the bottom of the body 101, a plurality of water spray holes 131 are distributed in a ring around the outside of the through hole 121. Water discharged from the gap between the lower through hole 121 and the rotating shaft 43 acts on the top of the cutter head structure 5. Water sprayed from the water spray holes 131 acts on the outside of the cutter head structure 5. During the up and down movement of the rotating shaft 43, the sealing plate 903 is always located above the water inlet pipe 901.

[0054] In the water supply solution, water enters through the water inlet pipe 901 and enters the inner pipe 9. The rotating shaft 303 passing through the inner pipe 9 is cooled down. The water in the inner pipe 9 acts on the top of the cutter head structure 5 through the through hole 121 below, thereby cooling the cutter head structure 5. Some water is sprayed out from the spray hole 131 and acts on the outside of the cutter head structure 5, thereby cooling the cutter head structure 5 and also flushing away the debris generated during drilling.

[0055] SeeFigure 3 and Figure 8 As shown, a spiral blade 433 is provided on the rotating shaft 43. The spiral blade 433 is located inside the inner pipe 9 and below the sealing plate 903. The lower end of the spiral blade 433 maintains a distance from the inner bottom surface of the body 101. When the rotating shaft 43 descends to the limit position, the spiral blade 433 does not contact the inner bottom surface of the body 101.

[0056] The spiral blade 433 is used to squeeze the water in the inner pipe 9 downwards when the rotating shaft 303 rotates, thereby increasing the water flow rate and the flushing effect.

[0057] Spiral blade 433 moves up and down with the rotating shaft 303.

[0058] See Figure 9 As shown, the cutter head structure 5 includes a cylindrical cutter body 501. The bottom of the cutter body 501 is machined with cutting teeth 502. A partition 503 is provided inside the cutter body 501. A groove is formed on the upper part of the partition 503. Drain holes 504 are distributed in a ring on the surface of the partition 503. Water leaking from the lower through hole 121 enters into the groove and enters the inner side of the cutter body 501 through the drain holes 504. The rotating shaft 43 is connected to the partition 503. Water discharged from the water spray hole 131 is located on the outer side of the cutter body 501. A drill bit 505 is provided at the bottom axis of the partition 503. The drill bit 505 is coaxial with the rotating shaft 43, and the lower end of the drill bit 505 extends to the outside of the cutter body 501.

[0059] In the above technical solution, a partition 503 is provided inside the cutter body 501. Water discharged from the through hole 121 enters the inner side of the cutter body 501 through the drain hole 504 on the surface of the partition 503, thereby cooling the cutter body 501 internally. Secondly, when drilling the positioning hole, the rotation of the drill bit 505 can be lubricated and cooled by the water entering through the drain hole 504.

[0060] In the above technical solution, the drill bit 505 is partially extended, which facilitates precise positioning during drilling. When opening a hole, a positioning hole is drilled first, and after the rotating shaft 303 is advanced, the hole is opened through the cutter body 501, making the opening position more precise.

[0061] See Figure 3 As shown, an inner housing 991 is provided inside the main body 101. The worm gear 302 and the worm 301 are located inside the inner housing 991. A lubrication hole 992 is drilled on the top of the main body 101. The lubrication hole 992 corresponds to the inside of the inner housing 991 and the worm gear 302.

[0062] Lubricating oil is injected through lubrication hole 992 and stored in inner housing 991 to reduce outflow. The lubricating oil injected through lubrication hole 992 acts directly on worm gear 302.

[0063] 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 this invention is defined by the appended claims and their equivalents.

Claims

1. A pipe drilling electric drill, characterized in that: The device includes a body (1), with clamping devices (2) installed on the front and rear sides of the body (1). A drive device (3) is connected between the body (1) and the clamping devices (2). Under the action of the drive device (3), the clamping devices (2) on both sides move simultaneously toward the body (1) or away from the body (1). A bracket (4) is provided on the top of the body (1). A slide table (41) is slidably connected to the bracket (4). A motor (42) is installed on the top of the slide table (41). A first rotating shaft (43) is installed at the output end of the motor (42). The first rotating shaft (43) passes downward through the body (1) and is connected to a cutter head structure (5). A base (6) is installed on the other side of the bracket (4). An electric push rod (7) is installed through the base (6). The electric push rod (7) is connected to the slide table (41). The machine body (1) includes a main body (101), which is connected to the front and rear sides. A cover plate (102) is detachably installed on the front and rear sides of the main body (101). Two sleeves (103) are installed at the bottom inner part of the main body (101). A guide rod (104) is fixedly installed through the sleeves (103). The guide rod (104) extends outward after passing through the cover plate (102). The clamping device (2) is guided by the guide rod (104). Wheel seats (190) are provided at the bottom left and right ends of the main body (101). A guide wheel (191) is rotated and engaged through the wheel seats (190). When the electric push rod (7) is in the retracted state and the guide wheel (191) acts on the outer wall of the pipe to be drilled, the cutter head structure (5) maintains a distance from the pipe to be drilled. The drive device (3) includes a worm (301), a worm wheel (302), and a second shaft (303). The worm (301) meshes with the worm wheel (302), and the second shaft (303) passes through the worm wheel (302). Both ends of the second shaft (303) pass through the cover plate (102) and extend outward. The second shaft (303) is rotatably engaged with the cover plates (102) on both sides. Both ends of the second shaft (303) are provided with threaded portions (304) with opposite directions of rotation. The worm (301) is rotatably connected to the body (101). The upper end of the worm (301) passes through the body (101) and is fitted with a handle (305). The threaded portion (304) is engaged with the clamping device (2). The clamping device (2) includes a slide rod (201), with two or more axles (202) vertically inserted at the bottom of the slide rod (201). The axles (202) are rotatably engaged with the slide rod (201). A wheel body (203) is mounted on the axle (202). An annular groove (204) is provided on the outer wall of the wheel body (203). The annular groove (204) acts on the outer wall of the pipe being processed. The slide rod (201) has a guide hole (205) that passes through the guide rod (104). The slide rod (201) is equipped with a buffer tensioner (8), which is driven by the threaded part (304).

2. The pipe drilling electric drill according to claim 1, characterized in that: The buffer tensioner (8) includes a U-shaped part (801), a slide rod (201) fitting inside the U-shaped part (801), and the U-shaped part (801) sliding along the slide rod (201). A threaded sleeve (802) is installed on the top of the U-shaped part (801), and the threaded portion (304) fits into the threaded sleeve (802). A push plate (803) acting on the slide rod (201) is provided inside the U-shaped part (801). A first guide rod (804) is provided at the end of the push plate (803) away from the slide rod (201). The first guide rod (804) passes through the U-shaped member (801). A spring (805) is fixed at the end of the push plate (803) away from the slide rod (201). The spring (805) acts on the inner end face of the push plate (803). A stop block (806) is provided at the opening of the U-shaped member (801) to prevent the slide rod (201) from falling out.

3. The pipe drilling electric drill according to claim 1, characterized in that: The bracket (4) has a lateral through guide groove (401). On the left end face of the bracket (4), there are limiting grooves (402) on both sides of the guide groove (401). The limiting grooves (402) are parallel to the guide groove (401). The front and rear sides of the slide table (41) are provided with slots (403) that fit the guide groove (401). The slide table (41) has a limiting strip (404) that matches the limiting groove (402). The limiting strip (404) slides vertically along the limiting groove (402). The base (6) is installed on the rear end face of the bracket (4) near the top.

4. The pipe drilling electric drill according to claim 1, characterized in that: An inner pipe (9) is provided inside the main body (101), and a water inlet pipe (901) is provided on the outer wall of the inner pipe (9). The water inlet pipe (901) passes through the right end face of the main body (101) and is fitted with a valve (902). The first rotating shaft (43) is coaxial with the inner pipe (9). Through holes (121) for passing through the first rotating shaft (43) are provided at the upper and lower ends of the main body (101). The first rotating shaft (43) is clearance-fitted with the through hole (121). A sealing plate (903) is provided inside the inner pipe (9). The first rotating shaft (43) passes through the sealing plate (903). The sealing plate (903) is located above the water inlet pipe (901). A sealing ring is fitted on the outer wall of the sealing plate (903). (904), the sealing ring (904) forms a seal with the inner wall of the inner pipe (9), the first rotating shaft (43) and the sealing plate (903) are fitted with a bearing (905) and a shaft seal (906), the shaft seal (906) is sealed below the bearing (905), at the bottom of the body (101), a plurality of water spray holes (131) are distributed in a ring on the outside of the through hole (121), the water discharged from the gap between the lower through hole (121) and the first rotating shaft (43) acts on the top of the cutter head structure (5), the water sprayed from the water spray hole (131) acts on the outside of the cutter head structure (5), during the up and down movement of the first rotating shaft (43), the sealing plate (903) is always located above the water inlet pipe (901).

5. The pipe drilling drill according to claim 4, characterized in that: The first rotating shaft (43) is provided with a spiral blade (433), which is located inside the inner pipe (9) and below the sealing plate (903), and the lower end of the spiral blade (433) maintains a distance from the inner bottom surface of the body (101).

6. The pipe drilling electric drill according to claim 5, characterized in that: The cutter head structure (5) includes a cylindrical cutter body (501), with cutting teeth (502) machined at the bottom of the cutter body (501). A partition (503) is provided inside the cutter body (501), and a groove is formed above the partition (503). Drain holes (504) are distributed in a ring on the surface of the partition (503). Water leaking from the lower through hole (121) enters into the groove and enters the inner side of the cutter body (501) through the drain holes (504). The first rotating shaft (43) is connected to the partition (503). Water discharged from the water spray hole (131) is located on the outer side of the cutter body (501). A drill bit (505) is provided at the bottom axis of the partition (503). The drill bit (505) is coaxial with the first rotating shaft (43), and the lower end of the drill bit (505) extends to the outside of the cutter body (501).

7. The pipe drilling electric drill according to claim 1, characterized in that: An inner housing (991) is provided inside the main body (101). The worm gear (302) and the worm (301) are located inside the inner housing (991). A lubrication hole (992) is drilled on the top of the main body (101). The lubrication hole (992) corresponds to the inside of the inner housing (991) and the worm gear (302).

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