KR960003964Y1 - A pipe perforator - Google Patents

Abstract

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Description

Water pipe perforator

1 is a cross-sectional view showing the cutting machine according to the longitudinal direction of the present invention.

2 is a cross-sectional view showing a perforator according to the present invention taken along the line II-II of FIG.

3 is a cross-sectional view of a state in which a perforator according to the present invention is attached to and used in a valve fastened to a water pipe.

* Explanation of symbols for main parts of the drawings

1: worm 2: worm gear

3: drive shaft 4, 5: bevel gear

6: cutter 6a: bottom hole

6b: Cutter blade 7: Corner center

8: juice pin 8b: screw hole

9: Bushing 9a: Screw groove

10: key 11: coupling

11a: coupling inner diameter 12: drive spindle

12a: inner diameter 13: feed shaft

13a: screw thread 13b: handle

14: housing 15a: transfer handle

15b: Bevel Gears for Transport 16a: Bevel Gears

16b: ring gear 16c: support ring

17: sun gear 19a, 19b, 19c, 19d: planetary gear

20: sun gear 21a, 21b, 21c, 21d: planetary gear

22a, 22b: carrier 23: connecting rod

24: worm gear box 25: case

26 case 27 water pipe

28: connection flange 29: valve

30: flange 31: packing

32: planetary gear assembly (16,20,21) 33: planetary gear assembly (17,18,19)

A: drive part B: cutting part

C: transfer part D: transmission

＂L＂: Longitudinal clearance between the cutter blade and the tip of the cutter center

The present invention relates to a device for drilling a hole for connecting a branch pipe to a water pipe in a state of water flow, and is particularly provided with a transmission using a planetary gear, when the cutter is cutting operation, excessive cutting resistance to the cutter The water pipe perforator is to be able to manually adjust the feed rate of the cutter so as not to be caught.

In general, when the hole is drilled in the main water pipe to connect the branch pipe to the large diameter water pipe in which the water flows inside, the work has to be cut after the water flowing in the water pipe is cut off. Until the completion was a problem that gives the singular inconvenience to the residents involved in the water supply pipe.

In particular, such a problem is that the larger the diameter of the water pipe, the more uncomfortable people in more areas.

In order to solve this problem, it is possible to perforate the water supply pipe without cutting the water flowing along the inside of the water pipe.The coupling and the valve are first attached to the outer periphery of the part to be drilled. A pipe puncher, which was to drill the pipe through the inside of the valve, was proposed in Utility Model Publication No. 80-2204.

However, the conventional pipe borer rotates the cutter feed shaft, which is screwed to the inner diameter of the bushing fitted to the rear end of the main shaft, so that the cutter moves forward and backward, and the cutter forward and reverse speeds rotate the cutter feed shaft. It is determined only by the speed and the lead of the screw formed on the feed shaft, and since there is no separate transmission device to reduce the rotation speed of the feed shaft, if the operator inadvertently moves the cutter forward There was a risk of breakage of the cutter due to sudden and excessive cutting resistance applied to the cutter.

Therefore, the present invention can puncture the water pipe without cutting the water supply flowing along the inside of the water pipe, and the rotation speed of the feed handle for manually feeding the cutting cutter is appropriately decelerated to be transmitted to the cutting shaft of the cutting cutter. Accordingly, the object of the present invention is to provide a continuous pipe perforator in which the cutter is moved forward slowly so that the cutting edge is not momentarily subjected to a large load.

The present invention for achieving the above object consists of a cutting unit for performing a drilling operation, a drive unit for rotating the cutting unit by receiving power from a power source, and a conveying unit for conveying the cutting unit, the transfer unit planetary gear The transmission using the gearbox is provided so that the rotational speed of the feed handle is appropriately decelerated and transferred to the feed shaft of the cutting cutter so that the feed speed of the cutting cutter can be adjusted.

Hereinafter, with reference to the accompanying drawings, the pipe perforator according to the present invention will be described in detail. As shown in FIG. 1, the pipe perforator according to the present invention receives a rotational force by the driving unit A and the driving unit A to rotate the cutting unit B by receiving power from a power source, It consists of a cutting portion (B) to rotate the cutter 6 to perform a drilling operation, and a transfer portion (C) for transferring the main spindle 8 of the cutting portion (B) to which the cutter (6) is attached. The driving unit B is connected to the cutting unit B by interlocking the bevel gears 4 and 5, and the transfer unit C is connected to the planetary gear assembly 32 at the rear end of the cutting unit B. 33).

Here, the drive unit (A) is a worm (1) receiving power from a power source, a worm gear (2) meshed with the worm (1), the front end is inserted into the worm gear (2) is fixed by the key Drive shaft (3) and bevel gears (4) fixed to the lower end of the drive shaft (3), and a plurality of thrust and ball bearings are installed in the middle of the drive shaft (3) to prevent shaft shaking and rotation of the shaft. It is supposed to be smooth.

In addition, the cutting portion (B), the driving spindles are arranged along the longitudinal direction of the housing 14, the bevel gear (5) to which the bevel gear (5) to which power is transmitted by engaging with the bevel gear (4) of the drive unit (A) ( 12) and inserted into the drive spindles 12 and connected to the drive spindles 12 and the key 10 while the cutter 6 is fixed to the tip by screwing the cutter center 7. The main spindle 8 is fastened and has a bushing 9 having a screw groove formed therein at one end thereof, and a screw thread 13a is formed in a predetermined portion of the circumferential surface along the longitudinal direction. The feed shaft 13 is inserted into the main spindle 8 in a state of being screwed with the screw groove 9a of (9), and the rear end 13b is exposed to the outside of the case 26 of the transfer section C. The outer circumference of the drive spindle 12 is a case 26 of the transfer unit (C) It is wrapped by a cylindrical housing 14 connected to it.

The transfer part C is a transfer device disposed at right angles to each other so as to transmit rotational force to the transmission device D connected to the feed shaft 13 as a key and the bevel gear 16a of the transmission device D. A bevel gear 15b and a transfer handle 15a connected to the transfer bevel gear 15b via a shaft 15c, and the transfer handle 15a extends out of the case 26 of the transfer portion C. The structure is exposed.

Here, the transmission (D) is composed of a pair of planetary gear assemblies (32, 33) are arranged side by side, one planetary gear assembly 32 is directly connected to the feed shaft 13 as a keyer and the other planetary The gear assembly 33 is fixedly connected to the coupling 11 by a key. One planetary gear assembly 32 includes a sun gear 20 fixed to the rear end of the feed shaft 13, a ring gear 16b integrally formed with the bevel gear 16a, and the sun gear 20. And a plurality of planetary gears 21 interposed between the ring gears 16b and support rings 16c fitted to the outer circumference of the ring gear 16b, and the other planetary gear assemblies 17, 18, 19 includes a sun gear 17 connected to the coupling 11 fitted on the feed shaft 13 by a key, a ring gear 18 disposed on the outermost circumference, and the sun gear 17 and a ring gear ( 18) consisting of a plurality of planetary gears (19) interposed between the interlocking, the planetary gears (19, 21) facing each other of the planetary gear assembly are connected to each other by a connecting rod 23, the connecting rod 23 is conveyed It is fitted on the shaft 13 and fixed to the carriers 22a and 22b covering the pair of planetary gear assemblies 32 and 33 on both sides. It has been determined.

And the cutter 6 is screwed to the front end surface of the said main spindle 8 by the screw thread of the cutter center 7 penetrating the hole 6a formed in the bottom center of the cylindrical body. Here, a cutter blade 6b is formed at the tip of the cutter 6, and the cutter blade 6b is formed when the cutter 6 is fastened to the main spindle 8 by the cutter center 7. The cutter center 7 is positioned behind the cutter center 7 in the axial direction by a small distance (L L).

The operation of the present invention configured as described above will be described.

When power is transmitted from the power source to the worm 1 via means such as a flexible power cable, the worm gear 2 meshed with the worm 1 rotates at a low speed but with a large rotational force, and the worm gear 2 Drive shaft (3) fixed by the key to the cutting unit (B) by transmitting the rotational force transmitted from the worm gear (2) to the bevel gear (5) engaged with the bevel gear (4) fixed at its tip Will rotate.

In addition, a ball bearing is disposed at the rear of the gear box 24 in which the worm 1 and the worm gear 2 are included, and a plurality of thrust bearings and a plurality of thrust bearings are disposed inside the casing 25 surrounding the drive shaft 3. Ball bearings (two in the present embodiment) are provided to support rotation and thrust of the drive shaft 3.

The rotational force is transmitted from the bevel gear 4 on the drive shaft 3 to the spindle side bevel gear 5 so that the drive spindles 12 fixed through the bevel gear 5 as keys are rotated. The rotational force is inserted into the inner diameter of the drive spindle 12 and transmitted to the main spindle 8 fixed by the two keys 10 so that the cutter 6 screwed to the tip of the main spindle 8 rotates and drills. Do the work.

Here, when the cutter 6 rotates to perform a drilling operation on the water pipe, the cutter 6 receives cutting resistance in a direction opposite to the direction of rotation of the cutter 6, in which case the cutter 6 Preferably, the cutter center 7 is screwed in a direction opposite to the cutting rotational direction of the cutter 6 so that the cutter spindle 7 is not loosened from the main spindle 8.

On the other hand, a cutter blade (6b) is formed at the tip of the cutter (6), when the cutter (6) is fastened to the juice pins (8) by the cutter center (7) the cutter blade (6b) Since the cutter 6 is located behind the cutter center 7 in the axial direction by a small distance (L L), the cutter center is more than the cutter blade 6b when the cutter 6 cuts the pipe. Since the cutting (7) is first performed so that the rotation center of the cutting cutter 6 is fixed, the shaking of the cutting cutter is prevented.

Here, with reference to Figures 1 and 2, the operation of the cutter 6 is moved forward while rotating cutting the water pipe in the drilling machine according to the present invention.

When the transfer handle 15a protruding outside the case 26 of the transfer unit C is rotated with a lever or the like to rotate the transfer bevel gear 15b fixedly installed at the tip thereof, the transfer handle 15a is vertically engaged with the bevel gear 15b. The bevel gear 16a and the ring gear 16b formed in the inner diameter of the body of the bevel gear 16a are rotated, and the ring gear 16b is simultaneously connected to the ring gear 16b and the sun gear 20. The sun gear 20 is rotated and driven through the planetary gear tank 21 which is engaged with the planetary motion while being engaged.

The feed shaft 13 also rotates together with the sun gear 20 because the feed shaft 13 is inserted into and fixed to the sun gear 20.

Therefore, when the feed handle 15a is rotated, the feed shaft 13 is rotated. The rotation speed of the feed shaft 13 is determined by the feed shaft 13 at the bushing 9 of the cutting portion B. Compared to the rotation speed of the cutting rotation state in which the juice pins B are being rotated together by being screwed together, the result is a relatively decelerated result, and the juice pins 8 of the cutting part B by the difference in the rotation speed thereof. The juice pins 8 having the cutter 6 fastened to the front end are produced because the rotating effect is generated, and the rear end of the feed shaft 13 does not move backward due to the bearing installed on the inner surface of the case 26. Only by the screw portion (13a) on the feed shaft 13 is forward feed.

With reference to FIG. 3, the state in which the perforator according to the present invention is attached to the pipe and used is described.

In order to drill a hole for connecting the branch pipe to the water pipe in the state of passing water, as shown in FIG. 3, the valve 29 is connected to the connection flange 28 tightly fastened to the water pipe 27 by a known method. ) Is attached to the valve 29, and the flange 30 of the perforator according to the present invention is fastened and installed as a bolt.

In this way, after the perforator according to the present invention is installed, the handle 29a is opened by turning the knob 29a provided at the upper end of the valve 29 to open the valve 29b and the handle of the feed shaft 13 provided at the rear end of the perforator according to the present invention. The cutter 6 is rapidly transported to the side surface of the water pipe 27 by turning 13b.

Then, by transferring power to the worm 1, the cutter 6 is rotated and the cutter 6 is slowly plunged into the water pipe 27 while rotating the transfer handle 15b of the transfer part C. It is punched while being cut by the cutter 6.

In this way, after being drilled in the water pipe 27, tap water is ejected from the water pipe 27 to the outlet 29c side of the valve 29 through the hole, and the present invention is provided at the outlet 29c side of the valve 29. Since the flange portion 30 of the punching machine according to the present invention is tightly fastened, even if water is punched out, the water does not flow out of the outside of the punching machine, and although a small amount, the juice pins 8 are formed on the flange 30. The water flowing out into the gap 30a of the inserted hole is prevented from leaking by a plurality of packings 31 surrounding the outer circumference of the juice pins 8 in the flange portion 30.

After the hole is completely drilled in the water pipe 27, the power transmitted to the worm 1 is interrupted to stop the cutting rotation of the cutting unit A and cut the handle 13b of the feed shaft 13. After rapidly reversing the cutter 6 while rotating in the opposite direction to the direction, the valve 29b is closed and the perforator according to the present invention is detached from the valve 29 without watering the water in the water pipe 27. Will be able to drill a hole in the water pipe 27 in the water flowed state.

The pipe boring machine according to the present invention operating as described above can be drilled without cutting a hole for connecting the branch pipe to the pipe in the state of being passed through the pipe, the planetary gear device at the rear end of the pipe boring machine according to the present invention By providing a transmission using the it is possible to prevent the rapid movement of the cutting edge forward.

Claims (1)

The drive unit A driven by receiving power from the power source through the worm 1 and the worm gear 2, and the cutter 6 provided at the front end of the spindle 12, 18 receiving the rotational force from the drive unit A. ) Is rotated and inserted into the cutting portion (B) for performing drilling operation on the water pipe (27) and the coupling (11) connected to the rear end of the driving spindle (12) of the cutting portion (B). A feed shaft 13 for screwing and rotating the screw grooves 9a of the bushing 9 provided at the rear end of the spindle 8 to forward and retract the juice pins 8 to which the cutter 6 is attached. In the pipe boring machine consisting of a conveying part (C) having a; A plurality of planetary gears (19a, 19b, 19c, 19d), (21a, 21b, 21c, 21d), which are interposed between the sun gear (17, 20) and the ring gear (18b, 16b), respectively, and are engaged in the transfer part (C). And a pair of planetary gear assemblies 32 and 33, each having a bevel gear 16a integrally formed on one side of the ring gear 16b, and meshed with the bevel gear 16a at a right angle. The transfer handle 15a, which is connected to the transfer bevel gear 15b via the shaft 15c, protrudes out of the case 26 of the transfer portion C, while the planetary gear assembly 32 includes the transfer shaft ( 13 is directly connected to the planetary gear assembly 33 is connected to the coupling 11, each planetary gear (19, 21) of both planetary gear assemblies (32, 33) is one connecting rod (23) And a water pipe perforator, characterized in that connected with a pair of carriers (22a, 22b).