KR20040104163A - Drilling Apparatus for Pipe - Google Patents

Abstract

PURPOSE: A punching device is provided to previously prevent the pollution of city water by collecting metal powder during a punching through magnetic force and to reduce the overload in a motor by setting a rotating speed of a cutting blade corresponding to a diameter of a punched hole. CONSTITUTION: An operating shaft(20) is arranged inside a first housing(71) to be rotatable for rotating a cutting blade(1). A moving device of the operating shaft is arranged inside a second housing(72) to punch a hole in a pipe through the cutting blade by moving forward and backward in the rotatable status of the operating shaft. The moving device of the operating shaft has a screw shaft to be combined with the operating shaft and beveled gear portions(91,92) to move the screw shaft forward and backward. A removing device of metal powder is arranged in the operating shaft and a fixing portion to absorb the metal powder during a punching through magnetic force. A gear shifting device(30) supports the operating shaft to rotate the operating shaft slow or fast according to the size of a punched hole in the pipe and shifts the rotating speed of a motor by arranging in the fixing portion. Thereby, the metal powder during the punching is collected easily.

Description

Drilling Apparatus for Pipes {Drilling Apparatus for Pipe}

The present invention relates to a pipe boring device, in particular, it is possible to easily collect the metal powder generated during the pipe boring made of a metal material, and to set the speed of the cutting edge used to correspond to the diameter of the hole to be drilled through the transmission gear Therefore, it is possible to reduce the overload generated in the motor during drilling, and to support the movable shaft without play, preventing the cutting edge from being broken during drilling, thereby improving workability and improving the reliability of the product. Relates to a device.

In general, the pipe mill is a device for drilling holes for communicating branch pipes to the main building in order to supply tap water from the main building mainly made of metal to each building.

Such a conventional milling factory is made of an electric method, and the cutting edge is coupled to the tip of the movable shaft to drill holes in the pipe as the movable shaft is rotated through a gun type motor.

On the other hand, the conventional mill factory was configured in the form of a transmission shaft is transferred to the driving force of the motor through the belt, for example, a belt drive method and was configured to always rotate the driving shaft at a constant speed.

However, when a hole is drilled in a pipe through which water flows through the conventional drilling device, some of the metal powder generated at this time may come out of the pipe by water pressure and flow into the drilling device with water or flow into the pipe. It is almost impossible to collect the powder.

Accordingly, the inside of the pipe is clogged or the tap water is contaminated by metal powder, and the non-watertight cloth mill is subjected to corrosion by water flowing into the inside during work, thereby causing the aging of the product.

In addition, as the movable shaft for rotating the cutting edge is fixed only to the rear end 1 point, the cutting edge coupled to the movable shaft rotates while drawing the trajectory larger than the diameter of the cutting edge while the movable shaft rotates.

In other words, the movable shaft is rotatably supported in the drilling apparatus with a predetermined clearance, and when the drilling operation is carried out in this state, the cutting edge friction with the pipe is shaken, causing frequent breakage of the cutting edge. There was a problem that encouraged a rise in costs.

In addition, since the rotational speed of the cutting edge used to correspond to the diameter of the hole to be drilled is constant, if a large diameter hole is drilled during the drilling, an overload occurs in the motor than when using a cutting edge for a small diameter. There was a problem that reduces the performance of the product.

Therefore, in order to solve the above problems, an object of the present invention is to collect the metal powder generated during the water pipe drilling through the magnetic force to prevent the inside of the pipe is blocked or the tap water is contaminated by the metal powder in advance, By setting the rotational speed of the cutting edge used to correspond to the diameter of the hole to be drilled through the transmission gear, it is to provide a pipe mill for reducing the overload generated in the motor during drilling.

In addition, another object of the present invention is to support the movable shaft without play to prevent breakage of the cutting edge during drilling to improve the productability as well as workability, and at the same time the water is introduced into the drilling device due to the water pressure at the same time To prevent corrosion of the inside of the device to prevent the degradation of the performance of the product to provide a pipe cloth factory.

1 is a front view showing a fabric mill for plumbing according to the present invention;

2 is a cross-sectional view showing a fabric mill for plumbing according to the present invention;

3A and 3B are schematic views showing an operating state of the fixing part viewed from the direction "A" shown in FIG. 1;

4a to 4c are schematic cross-sectional views showing the operating state of the gear transmission portion of the drilling device for pipes according to the present invention;

5 is a cross-sectional view showing an operating state of the drilling device for piping according to the present invention,

6A and 6B are schematic diagrams showing a use state of fixing a pipe fabricator according to the present invention to a pipe.

* Description of the main parts of the drawing *

1: cutting edge 7: clamp

7a, 7b: Fixing bolt 8: Pipe

8a: hole 8b: metal powder

9: motor 9a: motor bracket

9b: drive shaft 10: fixed part

11: Tightening Nut 13: Nut Support

13a: flange portion 15: swing portion

16a-16d: Bending Extension 17a-17d: Second Permanent Magnet

20: movable shaft 21: first permanent magnet

23a, 23b: keyway 30: gear transmission

31: gearbox 32: through hole

40: handle 51, 52: bearing

53: packing ring 61: first gear

62: second gear 63: third gear

64: fourth gear 65: rotary support shaft

65a, 65b: key 66: drive gear

66a: rotating shaft 67: fixed shaft

71: first housing 72: second housing

73: gear support 80: shifting switch

81: pushing piece 90: screw shaft

91: first bevel gear 92: second bevel gear

100: handle

In order to achieve the above object, the present invention is provided with a fixing portion fastened to the clamp clamped in the pipe, and the hole in the pipe by moving the cutting edge toward the inside of the pipe in accordance with the motor drive in the state coupled to the clamp A perforating device for pipes for drilling, comprising: a movable shaft rotatably disposed inside the first housing for rotating the cutting edge; The movable shaft has a screw shaft which is disposed inside the second housing so as to perforate the pipe through the cutting blade to move forward / backward in the rotatable state, and the front end is rotatably coupled to the rear end of the movable shaft, and the screw shaft forward / backward Movable shaft moving means having a bevel gear portion for; Metal powder removing means disposed at the leading end of the movable shaft and the fixing portion to adsorb metal powder generated during drilling by magnetic force; Gear shifting means arranged at the rear end of the fixed part for rotatably supporting the movable shaft to rotate the movable shaft at a low or high speed according to the size of the diameter of the hole drilled in the pipe and shifting the rotational speed of the uniform motor. Provides a fabric mill for plumbing, characterized in that.

In this case, the metal powder removing means includes a plurality of first permanent magnets fixedly fixed to the distal end of the movable shaft so as to generate magnetic force on the punching blade to attach and collect the metal powder generated during the drilling operation on the punching blade; A plurality of bent extension pieces circumferentially arranged inside the nut support of the fixing part, a plurality of second permanent magnets for providing magnetic force to the plurality of bent extension pieces, and the plurality of second permanent magnets Pivotally coupled to a rear end of the nut fixing portion for repositioning the plurality of second permanent magnets so as to correspond to the bent extensions of the plurality of bent extensions to provide or remove magnetic force to the plurality of bent extensions It is made of wealth.

In addition, the gear transmission means is coupled to the rotary shaft of the motor and the drive gear rotatably coupled to the lower end of the gear box disposed at the rear end of the fixed portion to rotate in accordance with the motor drive, the gear to receive the driving force of the drive gear Third and fourth gears which are rotatably disposed in the center of the box and have different gear ratios, and a rotation support shaft which rotates together with the movable shaft while supporting the central and rear ends of the movable shaft to rotate the movable shaft; And first and second gears integrally coupled to the outer circumference of the rotary support shaft and having different gear ratios to rotate the rotary support shaft by receiving driving force from the third gear and the fourth gear, respectively, on one side of the gearbox. The third gear and the first gear in order to set the rotational speed of the movable shaft to any one of high speed, low speed and neutral. Or to the coupling it consists of a fourth gear in the speed change switch for selectively switching a third and fourth gear to mesh with the second gear.

Furthermore, the gearbox further includes a pair of bearings and packing rings continuously coupled to the movable shaft such that the movable shaft is rotatable.

Therefore, in the present invention described above, it is possible to easily collect the metal powder generated during the water pipe drilling, and to select the rotation of the movable shaft according to the diameter of the drilling hole through the transmission gear, and the movable shaft without play so that the drilling blade is not damaged. It is possible to improve workability by supporting rotatable, and also improve watertightness to prevent water discharged from pipes from flowing into the punching device during operation, which shortens the life of the device as the inside of the device is corroded. You can prevent it in advance.

(Example)

Referring to the accompanying drawings, the fabric mill according to the present invention in detail as follows.

1 is a front view showing a fabric mill for plumbing according to the present invention, FIG. 2 is a cross-sectional view showing a mill fabric for plumbing according to the present invention, and FIGS. 3A and 3B are viewed from the direction "A" shown in FIG. 4A to 4C are schematic cross-sectional views showing an operating state of a gear shifting portion of a pipe drilling apparatus according to the present invention.

First, the gear mill for piping according to the present invention is a gear shift for shifting the rotational speed of the fixed part 10 for fixing the fabric mill to the clamp as a whole, the movable shaft 20 disposed inside the punching device as shown in FIG. 1. The handle 30 is formed at the rear end of the part 30 and the gear transmission part 30 to move the moving shaft 20 forward and backward at a predetermined interval.

In this case, the movable shaft 20 is supported in a sealed state by a pair of bearings 51 and 52 and a packing ring 53 disposed in the through hole 32 at the tip of the gear box 31 as shown in FIG. The key grooves 23a and 23b, which are supported inside the first and second gears 61 and 62 formed integrally with the central portion, and into which the pair of keys 65a and 65b coupled to the inner side of the rotary support shaft 65 are inserted. It is supported by three points as a whole.

Accordingly, since the movable shaft 20 rotates in a state where the front, the center, and the rear are supported during rotation, the play is not issued, so that the rotational trajectory of the movable shaft 20 is accurately maintained so that the cutting shaft is coupled to the movable shaft 20. When the blade 1 comes into contact with the pipe, it can be prevented from being broken by an irregular rotation trajectory as in the prior art, thereby reducing unnecessary costs incurred by replacing the cutting blade 1.

In addition, the movable shaft 20 is fixed to the plurality of first permanent magnets 21 at the tip portion as shown in Figure 2 to pull the metal powder generated when drilling the pipe with magnetic force to facilitate the metal powder (8b). Can be collected.

In addition, the fixing part 10 is pivotally disposed on the nut support 13 to which the fastening nut 11 coupled to the upper end of the clamp 7 and the flange portion 13a of the nut support 13 are pivotable. 3A, a plurality of bending extension pieces 16a to 16d having a predetermined length are arranged in the circumferential direction on the inner circumference of the nut support 13 as shown in FIG. 3A.

The bent extension pieces 16a to 16d are embedded in the rear end of the nut support 13 with the rear end bent. In this case, as shown in FIG. 3A, the plurality of second permanent magnets 17a to 17d are It is arranged so as to correspond to the plurality of bending extension pieces 16a to 16d, respectively, so that magnetic force can be generated in the bending extension pieces 16a to 16d.

Accordingly, the plurality of bending extension pieces 16a to 16d having magnetic force generated together with the first permanent magnet 21 can more effectively collect the metal powder 8b generated when the pipe is bored, and the drilling operation is completed. Afterwards, the plurality of bending extensions 16a are rotated by changing the position of the plurality of second permanent magnets 17a to 17d by turning the turning part 15 at a predetermined angle to remove metal powder from the punching device. The magnetic force generated at ˜16d) is removed. Therefore, the metal powder 8b attached to the plurality of bending extension pieces 16a to 16d is easily removed from the inside of the nut support 13.

In this case, it is preferable that the flange portion 13a of the fixing portion and the nut support 13 is made of a material through which magnetic properties do not pass, for example, plastic.

On the other hand, the gear transmission portion 30 is a drive gear rotatably coupled to the inner lower end of the gear box 31 so that the rotary shaft 66a on one side is coupled to the drive shaft 9b of the motor 9 to rotate according to the motor drive. (66) is provided. In this case, the end of the motor 9 is fixedly coupled by a motor bracket 9a fixed to the rear end of the gear transmission 30 and the rear end of the first housing 71.

In addition, the third and fourth gears 63 and 64, which are integrally formed to receive the driving force of the drive gear 66, are coupled to the inner center of the gear box 31 so as to be movable along the fixed shaft 67. The third and fourth gears 63 and 64 have different gear ratios. For example, as shown in FIG. 2, the diameter of the third gear 63 located closer to the fixing part 20 side is larger than the diameter of the fourth gear 64.

In addition, the shift switch 80 disposed at one side of the gearbox 31 may change the positions of the third and fourth gears 63 and 64 along the fixed shaft 65 from side to side as shown in FIGS. 4A to 4C. A pushing piece which is formed between the third and fourth gears 63 and 64 while being formed extending into the gearbox 31 to set the rotational speed of the movable shaft 20 to high speed, neutral (power removal) and low speed. (81) is provided.

In this case, in the case of drilling a hole having a diameter of 15 to 25 mm in the pipe, when the shift switch 80 is set at a high speed as shown in FIG. 5B, the pushing piece 81 is formed of the third and fourth gears 63 and 64. By moving in one direction, the third gear 63 is engaged with the first gear 61 to rotate the movable shaft 20 at high speed.

In addition, in order to drill a hole having a diameter larger than the hole, for example, a hole having a diameter of 30 to 50 mm, turning the shift switch 80 in a low speed direction as shown in FIG. The third and fourth gears 63 and 64 are moved in the other direction so that the fourth gear 64 is engaged with the second gear 62 so that the first and third gears 61 and 63 are engaged with each other. The movable shaft 20 is rotated at a low speed.

At this time, the cutting edge 1 is preferably used to replace the corresponding at the time of low speed and high speed rotation.

On the other hand, the screw shaft 90, the front end of which is coupled in the same axial direction to the rear end of the movable shaft 20 is screwed into the second bevel gear 92, the second bevel gear 92 is a gear support portion 73 Rotating to the first bevel gear 91 is rotatably coupled to the first bevel gear (91) to receive the driving force of the handle 40 to forward / backward the movable shaft (20).

In addition, the handle 100 is coupled to the rear end of the second housing 72 surrounding the screw shaft 90 so as to be used for supporting the fabric mill during transportation or transport.

Referring to the operation and effects of the drilling device for piping according to the present invention configured as described above in detail with reference to the drawings as follows.

Figure 5 is a cross-sectional view showing the operating state of the drilling device for pipes according to the present invention, Figure 6a and Figure 6b is a schematic diagram showing a use state of fixing the pipe mill factory in accordance with the present invention used in the pipe.

First, as shown in FIG. 6A, after the clamp 7 is coupled to the drilling position of the pipe 8 by using the fixing bolts 7a and 7b, the fabric mill having the cutting edge 1 coupled to the movable shaft 20. The fastening nut 11 is fastened to the clamp 7 at the upper end to be coupled to the clamp 7.

After that, when the shift switch 80 drills a hole having a diameter of, for example, 40 mm depending on the diameter to be drilled into the pipe 8 in the initial position, that is, in a neutral state, as shown in FIG. When turning so as to be set to 3C, the third and fourth gears 63 and 64 are moved to the second gear 62 side by the pushing piece 81, so that the second gear 62 and the fourth gear ( 64) is set to the engaged state.

As the motor 9 is turned on in this state, the driving gear 66 is rotated to transfer the driving force to the third gear 63 which is engaged with the driving gear 66. As the fourth gear 64 integrally formed with the three gears 63 is rotated, the driving force is transferred to the second gear 62, and as a result, the movable shaft 20 to which the cutting edge 1 is coupled rotates at a low speed. .

Next, the handle 40 is pivoted and the screw shaft 90 is moved forward by the first and second bevel gears 91 and 92 in the pipe 8 direction so that the rotating cutting edge 1 is connected to the pipe 8. The movable shaft 20 is advanced to pass through).

In this case, as the hole 8a is drilled in the pipe 8 as shown in FIG. 6b, water is introduced into the nut support 13 through the clamp 7 while water is discharged through the hole 8a by water pressure. The packing ring 53 disposed at the tip of the gearbox 31 may prevent water from flowing into the drilling apparatus.

Therefore, it is possible to prevent the degradation of the product by preventing corrosion of the inside of the drilling device or aging by water in advance.

In addition, the metal powder 8b generated when the hole 8a is drilled by the cutting edge 1 is a cutting edge having magnetic force by a plurality of first permanent magnets 21 arranged at the tip of the movable shaft 20. As it is attached to (1), metal powder can be collected naturally.

Furthermore, the metal powder 8b, which is loaded on the water discharged to the outside by hydraulic pressure and rises up to the inside of the nut support 13, has magnetic force through the second permanent magnets 17a to 17d disposed in the fixing part 20. The metal powder can be easily collected by being attached to the plurality of bending extensions 16a to 16d.

Accordingly, the metal powder may not be collected as in the related art, and thus, the inside of the pipe may be blocked or the tap water may be prevented from being contaminated by the metal powder.

On the other hand, after drilling the hole 8a, the movable shaft 20 is reversed by rotating the handle 40 in the reverse direction so that the cutting edge 1 completely exits the pipe as shown in FIG.

After that, the clamp nut 11 is rotated to separate the clamp 7 and the fabric mill, and then the cutting edge 1 is separated from the tip of the movable shaft 20 to remove the magnetic force from the movable shaft 20. The metal powder 8b adhering to the blade 1 can be easily removed from the cutting edge 1.

In addition, when the metal powder 8b attached to the plurality of bending extension pieces 16a to 16d is removed, the plurality of second permanent magnets 17a to 17d are folded extension pieces 16a to 16d as shown in FIG. 3B. When the turning part 15 is rotated at an angle not corresponding to the bending part, the metal powder 8b is disposed inside the nut support 13 while the magnetic force is removed from the plurality of bending pieces 16a to 16d. 16a to 16d) can be easily removed from the metal singer.

Furthermore, by setting the rotation speed of the cutting edge 1 of the other diameter used according to the diameter of the hole to be drilled as described above through the gear transmission portion 30, the overload generated in the motor 9 during drilling is reduced. Can be.

In the present invention described above, it is possible to easily collect the metal powder generated during the drilling of the water pipe, and to select the rotation of the movable shaft according to the diameter of the drilling hole through the transmission gear, and to rotate the movable shaft without play so that the drilling blade is not damaged. By supporting it as much as possible, workability can be improved.

In addition, the present invention has the advantage that it is possible to prevent the water is discharged from the pipe during the operation to prevent the inflow into the interior of the drilling device to prevent the device shortened life as the interior of the device is corroded.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the spirit of the present invention. Various changes and modifications will be possible by those who have the same.

Claims (4)

In the pipe boring device provided with a fixing portion fastened to the clamp clamped in the pipe, the drilling edge for drilling a hole in the pipe by moving the cutting edge toward the inside of the pipe in accordance with the motor drive in the state of being clamped in the clamp, A movable shaft rotatably disposed inside the first housing to rotate the cutting edge; The movable shaft has a screw shaft which is disposed inside the second housing so as to perforate the pipe through the cutting blade to move forward / backward in the rotatable state, and the front end is rotatably coupled to the rear end of the movable shaft, and the screw shaft forward / backward Movable shaft moving means having a bevel gear portion for; Metal powder removing means disposed at the leading end of the movable shaft and the fixing portion to adsorb metal powder generated during drilling by magnetic force; Gear shifting means arranged at the rear end of the fixed part for rotatably supporting the movable shaft to rotate the movable shaft at a low or high speed according to the size of the diameter of the hole drilled in the pipe and shifting the rotational speed of the uniform motor. Drilling device for a pipe, characterized in that the. The method of claim 1, wherein the metal powder removing means A plurality of first permanent magnets fixedly arranged at the distal end of the movable shaft so as to generate magnetic force on the punching blade to attach and collect metal powder generated during the punching work to the punching blade; A plurality of bending extension pieces arranged in the circumferential direction inside the nut support of the fixing part; A plurality of second permanent magnets for providing magnetic force to the plurality of bending extensions, The nut fixing part for changing a position of the plurality of second permanent magnets so that the plurality of second permanent magnets are disposed to correspond to the plurality of bent extensions and to provide or remove magnetic force to the plurality of bent extensions. Drilling device for a pipe, characterized in that consisting of a pivoting portion rotatably coupled to the rear end of the. The method of claim 1, wherein the gear shift means A drive gear rotatably coupled to a lower end of a gearbox disposed at a rear end of the fixed part to be coupled to a rotating shaft of the motor to rotate according to a motor driving; Third and fourth gears which are integrally formed to be rotatable in the center of the gearbox so as to receive the driving force of the drive gear, and having different gear ratios; A rotation support shaft rotating together with the movable shaft while supporting the central and rear ends of the movable shaft to rotate the movable shaft; First and second gears which are integrally coupled to the outer periphery of the rotation support shaft and have different gear ratios to rotate the rotation support shaft by receiving a driving force from the third gear and the fourth gear, respectively; A third gear and a fourth gear engaged with the first gear or a fourth gear with the second gear in order to set the rotational speed of the movable shaft to any one of high speed, low speed, and neutral. Drilling device for a pipe, characterized in that consisting of a shifting switch for selectively switching the gear. The drilling device for piping according to claim 1, further comprising a pair of bearings and a packing ring continuously coupled to the movable shaft such that the movable shaft is rotatable at the end of the gearbox.