JP2012176334A - Fluid pipe cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the flow of foreign matter pieces into an existing fluid pipe generated by the removal of a foreign matter while performing the removal of the foreign matter in the communication pipe extended from the existing fluid pipe.SOLUTION: A fluid pipe cleaning device 4 includes: a cutting part 7 water-tightly inserted into a communication pipe 2 communicating with an existing pipe 1, and turning around the pipe axis of the communication pipe 2 to remove a foreign matter 5 adhering to the inner peripheral surface of the communication pipe 2; and a discharging part 9b discharging the foreign matter 5 removed from the inner peripheral surface of the communication pipe 2 to the outside of the communication pipe 2, wherein the cutting part 7 includes: a first cutting part 11 cutting a place protruding from the inner peripheral surface to the inner diameter side of the communication pipe 2 in the foreign matter 5; and a second cutting part 12 cutting the foreign matter 5 remaining at the inner peripheral surface of the communication pipe 2 by the cutting of the first cutting part 11, and formed by a larger diameter than that of the first cutting part 11. The cut foreign matter 5 is discharged from the discharging part 9b to the outside of the communication pipe 2 by the fluid flowing in the existing fluid pipe 1.

Description

  The present invention includes a cutting part that is inserted in a watertight manner into a communication pipe that communicates with an existing fluid pipe and that rotates around the tube axis of the communication pipe to cut off foreign matter adhering to the inner peripheral surface of the communication pipe. The present invention relates to a fluid pipe cleaning device comprising: a discharge portion that discharges foreign matter cut from an inner peripheral surface of a pipe to the outside of a communication pipe.

  A conventional fluid pipe cleaning device includes a cylindrical removal blade (cutting part) that is inserted in a watertight manner into a branch pipe part (communication pipe) that branches upward from a pipe line (existing fluid pipe). The removal blade is connected to the tip, and has a cylindrical pipe shaft with a drain port (discharge portion) communicating with the outside, and is inserted while rotating the removal blade into the branch pipe portion. After cutting by crushing rust (foreign matter) adhering to the inner peripheral surface of the branch pipe part and cutting rust from the inner peripheral surface of the branch pipe part, the pipe shaft extends to the vicinity of the pipe bottom of the pipe line. The rust pieces (foreign matter) accumulated in the pipe line are discharged to the outside of the fluid pipe cleaning device through the pipe shaft and the drain port together with the water in the pipe line by moving the tip of the pipe and opening the drain port. (For example, refer to Patent Document 1).

JP 2010-22914 A (4th page, FIG. 4)

  However, in the fluid pipe cleaning device described in Patent Document 1, the foreign matter is crushed in order to cut the rust (foreign matter) in the branch pipe portion (communication pipe) without cutting off the pipe (existing fluid pipe). As a result, the rust pieces (foreign matter) that are generated by dropping into the pipe line cause the rust pieces to be mixed into the water flowing through the pipe line, thereby deteriorating the water quality.

  The present invention has been made paying attention to such a problem. While cutting foreign matter in a communication pipe extending from an existing fluid pipe, the foreign matter generated by the cutting of the foreign substance flows into the existing fluid pipe. It is an object of the present invention to provide a fluid pipe cleaning device that can prevent the above-described problem.

In order to solve the above-described problem, a fluid pipe cleaning device of the present invention includes:
A cutting portion that is inserted in a watertight manner into a communication pipe that communicates with an existing fluid pipe and that rotates around the tube axis of the communication pipe to cut off foreign matter adhering to the inner peripheral surface of the communication pipe; and the communication pipe A discharge part for discharging the foreign matter cut from the inner peripheral surface to the outside of the communication pipe, and a fluid pipe cleaning device for cleaning the communication pipe in an uninterrupted flow state,
The cutting portion is a first cutting portion that cuts a portion of the foreign matter that protrudes from the inner peripheral surface of the communication pipe toward the inner diameter side, and remains on the inner peripheral surface of the communication pipe by the cutting of the first cutting portion. A second cutting portion having a diameter larger than that of the first cutting portion, and cutting the foreign matter from the discharge portion by the fluid flowing in the existing fluid pipe. It is characterized by discharging towards the direction.
According to this feature, a portion of the foreign matter adhering to the inner peripheral surface of the communication pipe that protrudes toward the inner diameter side of the communication pipe is cut in the first stage by the first cutting section, and more than the first cutting section. By making the foreign material remaining on the inner peripheral surface in the large-diameter second cutting part into a two-stage structure that performs the second-stage cutting as a finish cutting, each foreign object can be cut with a light weight, Since the foreign matter can be discharged from the discharge portion by the fluid flowing in the existing fluid pipe, it is possible to prevent the cut foreign matter from flowing into the existing fluid pipe from the communication pipe.

The fluid pipe cleaning device of the present invention comprises:
The distal end portion of the first cutting portion is formed in a tapered shape having a reduced diameter in the direction of insertion into the communication pipe.
According to this feature, even if the foreign matter protrudes toward the inner diameter side of the communication tube by inserting the cutting portion into the communication tube, the cutting of the foreign material is gradually performed while the first cutting portion that contacts the foreign material is expanded. It can be performed stably.

The fluid pipe cleaning device of the present invention comprises:
The second cutting portion is characterized in that the bulging amount can be adjusted toward the outer diameter direction of the communication pipe.
According to this feature, the foreign matter remaining on the inner peripheral surface of the communication pipe can be more reliably cut by bulging the second cutting portion in accordance with the diameter of the communication pipe.

The fluid pipe cleaning device of the present invention comprises:
The first cutting part is characterized in that a through-hole penetrating in the tube axis direction of the communication pipe is formed.
According to this feature, the fluid flowing from the existing fluid pipe toward the discharge section is accelerated by passing through the through-hole having a smaller diameter than the communication pipe, so that the foreign matter cut by the cutting section is strongly discharged. Can be discharged from.

The fluid pipe cleaning device of the present invention comprises:
A plurality of spiral grooves are formed on the outer peripheral surface of the first cutting portion.
According to this feature, by rotating the cutting part in the horizontal direction, foreign matter cut by the first cutting part can be wound up along the groove part from below the first cutting part, and the existing fluid pipe A vortex is formed toward the discharge portion by the fluid flowing toward the discharge portion, and the foreign matter cut by the cutting portion can be strongly discharged from the discharge portion by the vortex.

1 is a cross-sectional view illustrating a fluid pipe cleaning device in Embodiment 1. FIG. (A) is sectional drawing of a cutting part, (b) is a side view of a cutting part. It is sectional drawing which shows the cutting of the foreign material by a 1st cutting part. It is sectional drawing which shows the cutting of the foreign material by a 2nd cutting part. (A) is a partial cross section figure of the cutting part in Example 2, (b) is a side view of a cutting part, (c) is a bottom view of a cutting part. (A) is a partial cross section figure of the cutting part in Example 3, (b) is a side view of a cutting part.

  EMBODIMENT OF THE INVENTION The form for implementing the fluid pipe | tube cleaning apparatus which concerns on this invention is demonstrated below based on an Example.

  The fluid pipe cleaning device according to the first embodiment will be described with reference to FIGS. 1 to 4. The code | symbol 1 of FIG. 1 is the existing fluid pipe | tube as a water supply transport pipe. As shown in FIG. 1, a communication pipe 2 extends upward at a predetermined location of the existing fluid pipe 1. A repair valve 3 is further connected to the upper end of the communication pipe 2 in a watertight manner. A pipe member such as an air valve and a fire hydrant (not shown) for discharging the air in the pipe of the existing fluid pipe 1 to the outside of the pipe is connected to the upper end portion of the repair valve 3 in a watertight manner.

  And the fluid pipe cleaning apparatus 4 which is this invention removes the foreign materials 5, such as a rust which adhered to the internal peripheral surface of the communicating pipe 2, after connecting to the upper end part of the repair valve 3 instead of the said piping member. It is a device used for. The fluid pipe cleaning device 4 includes a housing case 6 that is watertightly attached to the repair valve 3, a cutting portion 7 that is housed in the housing case 6 and is inserted into the communication pipe 2, and an upper portion of the cutting portion 7. And an insertion member 8 that protrudes from the upper surface of the housing case 6, can be moved up and down in a watertight manner with respect to the housing case 6, and can be rotated in the horizontal direction.

  The housing case 6 has a flange 6a that can be watertightly connected to the flange 3a of the repair valve 3 at the lower end, and the flange 6a corresponds to a bolt insertion hole 3b formed in the flange 3a of the repair valve 3. Bolt insertion holes 6b are formed. The housing case 6 is watertightly connected to the repair valve by tightening the flanges 3a and 6a with bolts and nuts 13 inserted into the bolt insertion holes 3b and 6b. Moreover, the cutting part 7 is accommodated inside the accommodation case 6, and an insertion hole 6 c through which the insertion member 8 is inserted in a watertight manner is formed on the upper surface of the accommodation case 6.

  Further, drainage valves 9a and 9b as discharge portions in the present invention are provided at the upper part of the storage case 6 so as to be openable and closable with the interior of the storage case 6. Among these, the drain valve 9a is provided above the drain valve 9b. Further, the drain valve 9b is formed to have a larger diameter than the drain valve 9a.

  The insertion member 8 is mainly composed of an outer cylindrical portion 8a formed in an inner cylindrical shape and an inner flange portion 8b that is rotatably inserted in the outer cylindrical portion 8a, and an outer periphery of the outer cylindrical portion 8a. The surface is inserted into the insertion hole 6c of the housing case 6 via the packing 8c so as to be movable up and down, and the cutting portion 7 is integrally connected to the lower end portion of the inner flange portion 8b.

  A male screw portion 8d (see FIG. 4) is formed at the upper end portion of the outer cylinder portion 8a, and a high nut 15 is screwed to the male screw portion 8d. The inner collar portion 8b is fixed to a substantially central portion in the horizontal direction of the moving arm 10 with the upper end facing the horizontal direction above the high nut 15 while being inserted into the high nut 15. For this reason, the inner flange portion 8b can push the moving arm 10 upward by rotating the high nut 15 relative to the male screw portion 8d and moving it upward. It is possible to move in the vertical direction with respect to the outer tube portion 8a by using the tightening of the high nut 15 with respect to the male screw portion 8d.

  As shown in FIGS. 2 (a) and 2 (b), the cutting portion 7 is a first cutting portion according to the present invention in which a substantially central portion in the horizontal direction of the upper end portion is connected to the lower end portion of the inner flange portion 8b. A plurality of (a pair in the present embodiment) leaf springs 12 serving as the second cutting portion in the present invention, disposed between the grindstone member 11 and the lower end portion of the grindstone member 11 and the outer cylinder portion 8a, It is composed of

  Among these, the grindstone member 11 has countless minute irregularities over the entire outer peripheral surface. The upper end portion of the outer peripheral surface is slightly smaller than the inner diameter of the communication pipe 2 (see FIG. 3), and the lower side of the outer peripheral surface is the insertion direction of the grindstone member 11 from the upper end side to the communication pipe 2. It is formed in the taper surface 11a diameter-reduced toward a certain lower end part side. For this reason, the grindstone member 11 is formed in a truncated cone shape in a side view. Further, the grindstone member 11 is formed with a plurality of through holes 11b penetrating in the tube axis direction of the communication tube 2.

  On the other hand, each leaf spring 12 has an outer cylindrical portion on the upper end side so that the width dimension between the substantially central portions in the vertical width direction of both leaf springs 12 and 12 is slightly shorter than the diameter of the grindstone member 11. The lower end portion of 8 a is connected by a bolt 16, and the lower end portion side is connected to the upper end portion of the grindstone member 11 by a bolt 16. A pair of notches 8e (one is not shown) is formed in the lower part of the inner flange portion 8b, and the ends of the fixing bolts 8f screwed from the outer cylinder portion 8a are formed in these notches 8e. It is placed. Since the tips of the fixing bolts 8f are disposed in the notches 8e, the horizontal rotation of the moving arm 10 prevents the inner flange portion 8b from rotating relative to the outer cylinder portion 8a in the horizontal direction. ing.

  Further, as described above, the inner flange portion 8b is movable upward with respect to the outer cylinder portion 8a by rotating the high nut 15 with respect to the male screw portion 8d. 11 moves upward together with the inner flange portion 8b by rotating the high nut 15 with respect to the male screw portion 8d. For this reason, both leaf springs 12 and 12 are sandwiched between the outer cylinder portion 8a and the grindstone member 11 by the upward movement of the grindstone member 11 so that the outside of the communication pipe 2 is removed. It is designed to bulge in the radial direction.

  In order to remove the foreign matter 5 from the communication pipe 2 by the fluid pipe cleaning device 4 configured as described above, first, as shown in FIG. 1, the repair valve 3 is closed and the upper end portion of the repair valve 3 is closed. Instead of the piping member (not shown), the fluid pipe cleaning device 4 is watertightly attached.

  Next, after opening the drain valve 9a, the repair valve 3 is opened, and the fluid flowing in the existing fluid pipe 1 is filled in the communication pipe 2, the repair valve 3 and the housing case 6. When the fluid is drained from the drain valve 9a by filling the container case 6 with the fluid, the drain valve 9a is closed.

  Then, as shown in FIG. 3, the drain valve 9b is opened and the moving arm 10 is pushed downward, so that the cutting portion 7 is moved from the housing case 6 toward the existing fluid pipe 1 in the repair valve 3 and The inside of the communication pipe 2 is moved. At this time, the grindstone member 11 is rotated in the horizontal direction around the tube axis of the communication pipe 2 by moving the cutting portion 7 toward the existing fluid pipe 1 while rotating the insertion member 8 in the horizontal direction. The portions of the foreign matter 5 protruding toward the inner diameter side of the communication tube 2 are sequentially cut from the upper side by the minute unevenness formed on the tapered surface 11a. For this reason, the foreign material 5 cut by the grindstone member 11 becomes a powder with a small mass.

  Further, as described above, since the drain valve 9b is opened during the cutting of the foreign matter 5 by the grindstone member 11, a water flow is generated in the communication pipe 2 from the existing fluid pipe 1 side toward the drain valve 9b. ing. In the process of flowing toward the drain valve 9b, this water flow is between the outer peripheral surface of the grindstone member 11 having a cross-sectional area smaller than the cross-sectional area of the communication tube 2 and the inner peripheral surface of the communication tube 2, and the through hole 11b. In order to flow in, the flow velocity is accelerated between the outer peripheral surface of the grindstone member 11 and the inner peripheral surface of the communication pipe 2 and in the through hole 11b, and the strongly cut foreign matter 5 is conveyed toward the drain valve 9b. Finally, the foreign matter 5 is discharged from the drain valve 9b to the outside of the existing fluid pipe 1 and the communication pipe 2.

  Then, after the grindstone member 11 is moved into the existing fluid pipe 1 and the cutting of the foreign matter 5 by the grindstone member 11 is completed, the high nut 15 is rotated with respect to the male screw portion 8d as shown in FIG. By moving it and moving it upward, the leaf springs 12 and 12 are elastically deformed and bulged so as to have a larger diameter than the grindstone member 11 in the outer diameter direction of the communication tube 2. In this state, the horizontal movement of the movable arm 10 while moving the movable arm 10 up and down causes the leaf springs 12 and 12 to move horizontally while moving up and down, and the foreign material 5 that cannot be cut by the grindstone member 11 is cut. I do.

  At this time, since the two springs 12 and 12 are elastically deformed so as to bulge in the outer diameter direction of the communication pipe 2, the high nut 15 and the outer cylinder are operated by the elastic force. A strong frictional force is generated between the male screw portion 8d formed at the upper end portion of the portion 8a. In addition, as described above, since the tip of the fixing bolt 8f is disposed in each notch 8e, the frictional force generated between the high nut 15 and the male screw portion 8d and the side surface of each notch 8e are provided. When the tip of the fixing bolt 8f comes into contact, the relative rotation of the moving arm 10 with respect to the outer cylinder portion 8a is prevented, and the grindstone member 11, the plate springs 12, 12, and the plate springs 12, 12 and the outer cylinder portion 8a are bolts. 16, the horizontal rotation of the moving arm 10 is interlocked with both the leaf springs 12, 12 to cut the foreign material 5.

  In this embodiment, as shown in FIG. 4, the foreign material 5 is cut by the plate spring 12 in a state where the plate spring 12 is in contact with the inner peripheral surface of the communication pipe 2. Every time the communication pipe 2 bulges in the outer diameter direction, the foreign material 5 is cut by the leaf spring 12 and finally the leaf spring 12 is brought into contact with the inner peripheral surface of the communication tube 2 to cut the foreign material 5. By doing so, the foreign material 5 can finally be removed cleanly from the inner peripheral surface of the communication pipe 2.

  In the cutting of the foreign matter 5 by the leaf spring 12, similarly to the cutting of the foreign matter 5 by the grindstone member 11, since a water flow is generated from the existing fluid pipe 1 toward the drain valve 9 b, the foreign matter cut by the leaf spring 12. 5 is transported toward the drain valve 9b by the water flow whose velocity is accelerated between the outer peripheral surface of the grindstone member 11 and the inner peripheral surface of the communication pipe 2 and in the through hole 11b, and finally the existing fluid is discharged from the drain valve 9b. It is discharged out of the pipe 1 and the communication pipe 2.

  In addition, after the cutting of the foreign material 5 by the leaf spring 12 is completed, the foreign material completely cut from the communication pipe 2, the repair valve 3 and the housing case 6 by maintaining the drain valve 9b open for a while. 5 is discharged, and then the drain valve 9b is closed.

  And as shown in FIG. 1, the cutting part 7 is accommodated in the accommodation case 6 by pulling back the movable arm 10, and the repair valve 3 is obstruct | occluded. After the repair valve 3 is closed, the pipe member (not shown) is attached to the repair valve 3 in place of the fluid pipe cleaning device 4 and the repair valve 3 is opened.

  As described above, in the fluid pipe cleaning device 4 according to the present embodiment, the cutting unit 7 includes the grindstone member 11 that cuts the portion of the foreign material 5 that protrudes from the inner peripheral surface of the communication pipe 2 toward the inner diameter side, and the grindstone member 11. A leaf spring 12 having a diameter larger than that of the grindstone member 11 for cutting the foreign matter 5 remaining on the inner peripheral surface of the communication pipe 2 by cutting, and the cut foreign matter 5 in the existing fluid pipe 1 Is discharged from the drain valve 9b to the outside of the communication pipe 2 by the fluid flowing through the outer surface of the communication pipe 2, so that a portion of the foreign matter 5 adhering to the inner peripheral surface of the communication pipe 2 protruding toward the inner diameter side of the communication pipe 2 is Then, the first stage cutting is performed, and the foreign material 5 remaining on the inner peripheral surface by the leaf springs 12 and 12 having a diameter larger than that of the grindstone member 11 is used as the final cutting, and the second stage cutting is performed. Thus, each foreign material 5 can be cut finely and lightly. It is possible by the fluid flowing through the tube 1 to discharge the foreign matter 5 from the drain valve 9b, it is possible that the foreign matter 5 that is cut to prevent flowing from the communicating pipe within 2 to existing fluid pipe 1.

  Moreover, since the front-end | tip part of the grindstone member 11 is formed in the taper surface 11a diameter-reduced toward the insertion direction to the communication pipe 2, it is foreign material by inserting the cutting part 7 in the communication pipe 2. Even if 5 protrudes toward the inner diameter side of the communication tube 2, the grinding of the foreign material 5 can be performed gradually and stably while expanding the diameter of the grindstone member 11 that contacts the foreign material 5.

  In addition, since the leaf spring 12 can adjust the bulge amount toward the outer diameter direction of the communication pipe 2, the leaf spring 12 is bulged in accordance with the diameter of the communication pipe 2, so that the inner diameter of the communication pipe 2 is increased. The foreign material 5 remaining on the peripheral surface can be cut more reliably.

  In addition, since the grindstone member 11 is formed with a through hole 11b penetrating in the tube axis direction of the communication pipe 2, the fluid flowing from the existing fluid pipe 1 toward the drain valve 9b is more than in the communication pipe 2. Since it is accelerated by passing through the small-diameter through hole 11b, the foreign material 5 cut by the cutting portion 7 can be strongly discharged from the drain valve 9b.

  Next, a fluid pipe cleaning device according to a second embodiment will be described with reference to FIGS. 5 (a) to 5 (c). In addition, the same structure as the said Example is abbreviate | omitted.

  The 1st cutting part in a present Example is comprised as the metal drill member 14, as shown to Fig.5 (a), FIG.5 (b), and FIG.5 (c). The drill member 14 has a taper in which a part of the outer peripheral surface is reduced in diameter from the upper end side toward the lower end side, which is the insertion direction of the drill member 14 into the communication pipe 2, as in the grindstone member 11 in the first embodiment. It is formed on the surface 14a. The drill member 14 is formed with a plurality of through holes 14b penetrating in the tube axis direction of the communication pipe 2, and the outer peripheral surface of the drill member 14 including the tapered surface 14a extends from the lower end to the upper end. A plurality of spiral grooves 14c are formed.

  By configuring the first cutting portion as the drill member 14 in this way, when the drill member 14 is rotated in the horizontal direction, the foreign material 5 is cut by the plurality of groove portions 14c, and the drill member 14 is formed from below the drill member 14. The foreign material 5 cut at 14 can be wound up along the groove 14c. Furthermore, in addition to the fact that the water flow of the fluid flowing from the existing fluid pipe 1 toward the drain valve 9b passes through the through-hole 14b, a part of the water flow passes through the groove 14c, so that the drill member Since a vortex due to the water flow of the fluid is formed above 14, the foreign material 5 cut by the drill member 14 is transported more strongly to the drain valve 9 b by this vortex and discharged to the outside.

  As described above, in the fluid pipe cleaning device 4 according to the present embodiment, since a plurality of spiral grooves 14c are formed on the outer peripheral surface of the drill member 14, the cutting part 7 is rotated in the horizontal direction. The foreign material 5 cut by the drill member 14 can be wound up along the groove 14c from below the drill member 14, and the fluid flowing from the existing fluid pipe 1 toward the drain valve 9b is directed toward the drain valve 9b. A vortex is formed, and the foreign material 5 cut by the cutting portion 7 by this vortex can be strongly discharged from the drain valve 9b.

  Next, a fluid pipe cleaning device according to a third embodiment will be described with reference to FIGS. 6 (a) to 6 (b). In addition, the same structure as the said Example is abbreviate | omitted.

  As shown in FIGS. 6A and 6B, the first cutting portion in the present embodiment is a grindstone member 11 'made of the same material as the grindstone member 11 of the first embodiment. The grindstone member 11 'has a substantially upper end portion that is slightly shorter than the inner diameter of the communication tube 2 in a front view and a lower end portion that is formed in a shorter length than the upper end portion. It is formed in the shape of a plate. For this reason, in the grindstone member 11 ′ of the present embodiment, the distance between the inner peripheral surface of the communication tube 2 and the grindstone member 11 ′ in the communication tube 2 is higher than that of the grindstone member 11 of the first embodiment and the drill member 14 of the second embodiment. A large amount of water flows through.

  Further, since the grindstone member 11 ′ is formed in a plate shape, the resistance received from the water flow is smaller than that of the grindstone member 11 of the first embodiment and the drill member 14 of the second embodiment. The inside of the repair valve 3 and the inside of the communication pipe 2 can be moved from the inside 6 toward the existing fluid pipe 1.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above embodiment, the through hole 11b is formed in the grindstone member 11 in the direction of the tube axis of the communication pipe 2, but the foreign material 5 cut into the water flow from the existing fluid pipe 1 toward the drain valve 9b is conveyed. The through hole 11b may not be formed in the grindstone member 11 as long as the flow rate is sufficient.

  Moreover, in the said Example, although the fluid in the existing fluid pipe | tube 1 is clean water, the fluid which flows through the inside of the existing fluid pipe | tube 1 is not necessarily restricted to clean water, For example, industrial water may be sufficient, and gas Or a fluid pipe through which a fluid in a gas-liquid mixed state flows may be used.

  Moreover, in the said Example 1 and 3, the 1st cutting part is comprised as the grindstone member 11 and 11 'which has innumerable micro unevenness | corrugation over the whole outer peripheral surface, In the said Example 2, in 1st, The cutting portion is configured as a drill member 14 having a plurality of spiral grooves 14c formed from the lower end portion to the upper end portion on the outer peripheral surface. As long as it can be formed on the surface, the outer peripheral surface may be knurled or artificial diamond, or may be formed in a file shape.

DESCRIPTION OF SYMBOLS 1 Existing fluid pipe 2 Communication pipe 4 Fluid pipe cleaning apparatus 5 Foreign material 7 Cutting part 9a, 9b Drain valve (discharge part)
11 Grinding wheel member (first cutting part)
11a Tapered surface 11b Through hole 12 Leaf spring (second cutting part)
14 Drill member (first cutting part)
14a Tapered surface 14b Through hole 14c Groove

Claims (5)

A cutting portion that is inserted in a watertight manner into a communication pipe that communicates with an existing fluid pipe and that rotates around the tube axis of the communication pipe to cut off foreign matter adhering to the inner peripheral surface of the communication pipe; and the communication pipe A discharge part for discharging the foreign matter cut from the inner peripheral surface to the outside of the communication pipe, and a fluid pipe cleaning device for cleaning the communication pipe in an uninterrupted flow state,
The cutting portion is a first cutting portion that cuts a portion of the foreign matter that protrudes from the inner peripheral surface of the communication pipe toward the inner diameter side, and remains on the inner peripheral surface of the communication pipe by the cutting of the first cutting portion. A second cutting portion having a diameter larger than that of the first cutting portion, and cutting the foreign matter from the discharge portion by the fluid flowing in the existing fluid pipe. A fluid pipe cleaning device, characterized in that the fluid pipe is discharged in the direction.   2. The fluid pipe cleaning device according to claim 1, wherein a distal end portion of the first cutting portion is formed in a tapered shape having a reduced diameter in an insertion direction into the communication pipe.   3. The fluid pipe cleaning device according to claim 1, wherein the second cutting portion is capable of adjusting a bulge amount toward an outer diameter direction of the communication pipe.   The fluid pipe cleaning device according to any one of claims 1 to 3, wherein the first cutting portion is formed with a through-hole penetrating in a pipe axis direction of the communication pipe.   The fluid pipe cleaning device according to any one of claims 1 to 4, wherein a plurality of spiral grooves are formed on the outer peripheral surface of the first cutting portion.

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