JP2014076412A - Scraper for fluid pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scraper for a fluid pipe which can efficiently remove deposit attached to an outer circumference surface of the fluid pipe by simple operation without scratching the outer circumference surface of the fluid pipe or peeling an anticorrosion treatment layer.SOLUTION: A scraper 1 for a fluid pipe removes deposit 14 attached to an outer circumference surface of the fluid pipe 13. A plurality of scraping-off members 4 which can scrape off the deposit 14 are protruded at predetermined intervals on a surface of a flexible belt 2 with handle parts 3 attached on both end parts in a length direction. Therefore, the surface of the belt 2 is separated from the outer circumference surface of the fluid pipe 13.

Description

  The present invention relates to a fluid pipe scraper that can remove deposits such as soil and rust adhering to the outer peripheral surface of an existing fluid pipe.

  For example, when installing a gate valve or a branch pipe to an existing fluid pipe buried in the ground, excavating the circumference of the buried fluid pipe to expose the fluid pipe, It is necessary to work after removing dirt and rust on the surface. Conventionally, a spatula, a grinder or the like has been used to remove such deposits such as soil and rust adhering to the hump.

  Further, the outer peripheral surface of the pipe is hit with a plurality of hammers at a high cycle, and the outer peripheral surface is mechanically cleaned (see, for example, Patent Document 1), or the outer peripheral surface of the pipe is covered with a cylindrical body separated from each other, There is a tube wall scale removing device (see, for example, Patent Document 2) that moves both cylinders in the approaching and separating directions and removes the scale attached to the outer peripheral surface by a scraper provided on the inner surface of the cylinder.

Japanese Utility Model Laid-Open No. 4-10293 (first and second figures) Japanese Unexamined Patent Publication No. 2000-93910 (first item, FIG. 4)

  In the operation using the spatula, it takes a lot of time to remove dirt and rust adhering to the outer peripheral surface, and the work efficiency is extremely poor. In particular, it is very difficult to remove the deposits stuck to the lower surface of the fluid pipe with a spatula because of poor workability. In addition, in ductile cast iron fluid pipes widely used in waterworks, dirt and rust are often firmly attached to the uneven surface formed on the outer peripheral surface, so removing these with a spatula More difficult.

  On the other hand, removal with a grinder has the advantage of efficiently removing deposits such as dirt and rust attached to the outer peripheral surface, but there is a risk that the outer peripheral surface of the fluid pipe other than the deposits may also be scraped. The anticorrosion treatment layer such as painting applied to the surface may be peeled off. If it becomes like this, it will be necessary to give an anti-corrosion process to an outer peripheral surface again, and an operation man-hour will increase.

  Furthermore, since the cleaning tool and the scale removing device described in Patent Documents 1 and 2 are both large-scale mechanical devices, the construction site is limited, and the removal of deposits for existing fluid pipes embedded in the ground Is unsuitable.

  Further, the cleaning tool of Patent Document 1 strikes the outer peripheral surface of the tube with a hammer, and the scale removing device of Patent Document 2 moves in the tube axis direction with the scraper coming into contact with the outer peripheral surface of the tube. However, there is a great risk of scratching the outer peripheral surface of the tube or peeling off the anticorrosion treatment layer.

  The present invention has been made paying attention to such a problem, and is attached to the outer peripheral surface of the fluid pipe by a simple operation without damaging the outer peripheral surface of the fluid pipe or peeling off the anticorrosion treatment layer. It is an object of the present invention to provide a fluid pipe scraper that can efficiently remove kimono.

In order to solve the above problems, a scraper for a fluid pipe according to the present invention comprises:
A fluid pipe scraper for removing deposits adhering to the outer peripheral surface of the fluid pipe,
By projecting a plurality of scraping members capable of scraping off the adhering matter at predetermined intervals on the surface of a flexible belt having handle portions attached to both ends in the length direction, the surface of the belt is The fluid pipe is separated from the outer peripheral surface of the fluid pipe.
According to this feature, the flexible belt of the scraper for the fluid pipe is wound around the outer peripheral surface of the fluid pipe, and it is attached to the outer peripheral surface of the fluid pipe with a simple operation by simply grasping and moving the handle portion of the scraper. The adhered matter is scraped off by the scraping member, and the scraped matter can be discharged and removed from the separated portion between the outer peripheral surface of the fluid pipe and the surface of the belt.

The scraper for fluid pipes of the present invention is
A rough surface portion capable of scraping off the adhering matter is provided on the surface of the belt between the scraping members adjacent to each other.
According to this feature, not only the deposits attached to the outer peripheral surface of the fluid pipe can be efficiently removed in two stages by the rough surface portion in addition to the scraping member, but also the rough surface portion is separated from the outer peripheral surface of the fluid pipe. The rough surface portion avoids the possibility of scratching the outer peripheral surface of the fluid pipe or peeling off the anticorrosion treatment layer.

The scraper for fluid pipes of the present invention is
The rough surface portion is formed by a large number of hard protrusions having sharp tips.
According to this feature, even if the deposit is firmly attached to the outer peripheral surface of the fluid pipe, it can be easily scraped off by the hard protrusion.

The scraper for fluid pipes of the present invention is
A contact surface of the scraping member with the outer peripheral surface of the fluid pipe is an arc surface that can come into surface contact with the outer peripheral surface of the fluid pipe.
According to this feature, since the surface pressure of the contact surface of the scraping member with the outer peripheral surface of the fluid pipe is reduced, the scraping member may damage the outer peripheral surface of the fluid pipe or peel off the anticorrosion treatment layer. Is prevented.

The scraper for fluid pipes of the present invention is
Both ends of the scraping member in the length direction are gradually sharpened toward the tip.
According to this feature, the scraping effect of the deposit can be enhanced by scraping the deposit at both ends of the sharp scraping member toward the tip.

The scraper for fluid pipes of the present invention is
The grip portion is detachably attached to both ends of the belt.
According to this feature, when the scraping member or the rough surface portion is worn, or when used for a fluid pipe having a different outer diameter or material, the handle portion can be removed and replaced with another belt.

It is a top view of the scraper for fluid pipes concerning Example 1 of the present invention. It is a front view like FIG. FIG. 3 is an enlarged longitudinal sectional side view taken along line III-III in FIG. 1. FIG. 4 is an enlarged longitudinal sectional side view taken along line IV-IV in FIG. 1. It is an enlarged vertical front view along the VV line of FIG. It is an expansion perspective view of the rough surface part formation part of a belt. It is a top view which shows the modification of the attaching part of a handle part. It is a vertical front view which follows the VIII-VIII line of FIG. It is an expanded longitudinal cross-sectional view of the scraping member in the scraper for fluid pipes concerning Example 2 of the present invention. It is an enlarged vertical front view of the same site | part as FIG. 5 of the scraper for fluid pipes concerning Example 3 of this invention. It is a side view which shows the usage example of the scraper for fluid pipes concerning the Example of this invention. It is a front view like FIG.

  EMBODIMENT OF THE INVENTION The form for implementing the scraper for fluid pipes which concerns on this invention is demonstrated based on the following Examples.

  A fluid pipe scraper according to a first embodiment will be described with reference to FIGS. As shown in FIGS. 1 and 2, the fluid pipe scraper 1 in this embodiment is a scraper for removing deposits adhering to the outer peripheral surface of the fluid pipe as will be described later. For example, polyester-based, polyamide-based, polypropylene Flexible belt 2 formed to a predetermined thickness with fibers of the system or cloth, grips 3 and 3 detachably attached to both ends in the length direction, and the surface of belt 2 ( On the surface of the belt 2 between a plurality of (four in this embodiment) scraping members 4 projecting at predetermined intervals in the length direction on the upper surface) and between the scraping members 4 and 4 adjacent to each other. And a rough surface portion 5 formed. The length of the belt 2 is longer than the circumferential length of the fluid pipe 13 described later.

  As shown in the enlarged cross-sectional views of FIGS. 1 and 5, each scraping member 4 includes a leg piece 4 a slightly shorter than the width dimension of the belt 2 and a belt continuously provided at the tip (upper end) thereof. 2 comprises a contact piece 4b whose dimension in the length direction is larger than that of the foot piece 4a, and has a substantially T-shaped cross section as a whole. The upper surface of the contact piece 4b is a concave curved circular arc surface 4c so as to be in surface contact with the outer peripheral surface of the fluid pipe 13 to be described later. Thus, by making the upper surface of the contact piece 4b into a concave curved arcuate surface 4c, the contact area between the scraping member 4 and the outer peripheral surface of the fluid pipe 13 can be increased, and the contact surface pressure is increased. Therefore, the scraping member 4 prevents the outer peripheral surface of the fluid pipe 13 from being damaged and the anticorrosion treatment layer from being peeled off.

  The foot piece 4a of each scraping member 4 is fixed to the center of the upper surface of the metal fixed substrate 6 integrally or by welding, adhesion or the like so as to face the width direction orthogonal to the belt 2. As shown in FIG. 3, the fixed substrate 6 presses the inwardly U-shaped caulking pieces 6 a, 6 a continuously provided downward at both ends in the width direction toward the lower surfaces of both ends in the width direction of the belt 2. By caulking, the belt 2 is fixed in close contact with the upper surface of the belt 2. The scraping member 4 and the fixed substrate 6 may be integrally formed with a hard synthetic resin or the like, and the fixed substrate 6 may be fixed to the upper surface of the belt 2 by welding, an adhesive, or the like.

  As will be described later, when the belt 2 is wound around the fluid pipe 13 in a U-shape, for example, at least two scraping members 4 are connected to the fluid pipe 13. It is determined so as to always come into contact with two places on the outer peripheral surface (see FIG. 12).

  The rough surface portion 5 is formed by fixing a flexible file plate made of hard abrasive such as sand paper or artificial diamond on the surface of the belt 2 between the scraping members 4 adjacent to each other, or FIG. As shown in the enlarged perspective view, a flexible substrate 8 having a large number of hard protrusions 7 with sharp tips on the surface is fixedly formed. In this case, the substrate 8 and the hard protrusion 7 may be either metal or hard synthetic resin. Since the hard protrusion 7 is formed on the rough surface portion 5 in this manner, even if the deposit 14 described later is firmly attached to the outer peripheral surface of the fluid pipe 13 (see FIGS. 11 and 12), the hard protrusion 7 can be easily scraped off. Can be dropped.

  As shown in FIGS. 4 and 5, a known belt buckle 9 is fixed to the attachment portion of the handle portion 3 to the belt 2, and the buckle 9 is inserted into the end portion of the belt 2 to fix the fixing lever 10. The handle part 3 can be fixed to the end of the belt 2 by pushing down, and the handle part 3 can be easily detached from the belt 2 by pulling up the fixing lever 10. Therefore, during use of the fluid pipe scraper 1, when the scraping member 4 or the rough surface portion 5 is worn, or according to the pipe diameter or material of the fluid pipe, it can be easily replaced with another belt.

  In addition, it can replace with such a buckle 9, and can also attach the handle part 3 to the edge part of the belt 2 so that attachment or detachment is possible also using an attachment means as shown in FIG.7 and FIG.8. That is, a folded portion 2a is provided at the end of the belt 2, and the bolt 11 is inserted through the inner space of the folded portion 2a and the pair of mounting pieces 3a, 3a projecting from the proximal end portion of the handle portion 3. The wing nut 12 is screwed into the male thread portion 11a of the bolt 11. In this way, the belt 2 can be easily replaced simply by loosening the wing nut 12 and inserting / removing the bolt 11.

  Next, a fluid pipe scraper 1 according to a second embodiment will be described with reference to FIG. In the present embodiment, the members other than the scraping member 4 are the same as those in the first embodiment, and thus the description thereof is omitted.

  In the scraping member 4 of this embodiment, the surface facing the belt 2 in the abutting portion 4b is inclined surfaces 4d and 4d gradually separated from the upper surface in the length direction of the belt 2, Both end portions of the contact portion 4b in the length direction of the belt 2 are gradually sharpened toward the tip. In this way, when the fluid pipe scraper 1 is used, when the contact portion 4b of the scraping member 4 is brought into contact with the outer peripheral surface of the fluid pipe 13 and the belt 2 is moved in the circumferential direction, the fluid pipe 13 The hump-like deposit 14 adhering to the outer peripheral surface of the contact portion 4b can be effectively removed by the sharp end portions of the contact portion 4b. In this embodiment as well, the upper surface of the contact portion 4b is an arc surface 4c so as to be in surface contact with the outer peripheral surface of the fluid pipe 13.

  Next, a fluid pipe scraper 1 according to a third embodiment will be described with reference to FIG.

  In the present embodiment, a scraping member 4 similar to that of the first embodiment is also provided on the back surface of the belt 2 so as to face away from the scraping member 4 on the front surface side, and the back surface A rough surface portion 5 similar to that of the first embodiment is also formed on the back surface of the belt 2 between the scraping members 4 adjacent to each other on the side. In this embodiment, the front and back fixed substrates 6 and 6 to which the foot pieces 4a of the scraping member 4 are fixed are fixed to the front and back surfaces of the belt 2 by welding, an adhesive, or the like. Thus, if the scraping member 4 and the rough surface portion 5 are provided also on the back surface side of the belt 2, when the scraping member 4 or the rough surface portion 5 on the front surface is worn, the scraper 1 for fluid pipes is reversed so that the back surface is reversed. Since the side can be used, the replacement time of the belt 2 can be doubled.

  Next, a usage example of the fluid pipe scraper 1 of the above embodiment will be described with reference to FIGS. 11 and 12.

  The fluid pipe 13 of this use example is made of, for example, ductile cast iron for waterworks buried in the ground, is formed in a substantially circular shape in cross section, and has an inner peripheral surface covered with a mortar layer. The fluid pipe according to the present invention may be made of other metals such as cast iron and steel, or made of asbestos, concrete, vinyl chloride, polyethylene, or polyolefin. Furthermore, the inner peripheral surface of the fluid pipe is not limited to the mortar layer, and may be coated with, for example, an epoxy resin or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe with powder coating. In this embodiment, the fluid in the fluid pipe is clean water, but is not limited to clean water in this embodiment. For example, in addition to industrial water, agricultural water, sewage, etc., gas or gas-liquid mixture of gas and liquid It does not matter.

  When the construction for attaching a gate valve or a branch pipe to the existing fluid pipe 13 buried in the ground is performed by excavating the periphery of the buried fluid pipe 13 to expose the fluid pipe 13, Prior to the construction, it is necessary to remove mainly solid deposits 14 made of knot-like soil or rust attached to the outer peripheral surface of the fluid pipe 13. The fluid pipe scraper 1 of the embodiment is used.

  First, after the user of the fluid pipe scraper 1 winds the belt 2 around the exposed outer peripheral surface of the fluid pipe 13 in a U shape, the belt 2 is fluidized while gripping the grips 3 and 3 at both ends. The tube 13 is pressed against the outer peripheral surface of the tube 13 and reciprocated in the vertical direction as indicated by arrows. Then, in the first stage, the large deposit 14 having a high height located between the scraping members 4 and 4 adjacent to each other is gradually scraped off by the plurality of rough surface portions 5. When the deposit 14 is scraped to a certain height, the contact portions 4b of the plurality (two in this embodiment) of the scraping member 4 are disposed at a plurality of locations (two locations in this embodiment) on the outer peripheral surface of the fluid pipe 13. To touch.

  In this state, when the belt 2 is continuously reciprocated in the vertical direction, the deposit 14 is scraped off by the contact portions 4b of the plurality of scraping members 4 in the second stage. At this time, the large deposit 14 having a high height is already scraped off by the rough surface portion 5 in the first stage, and its size and height are reduced. Therefore, the deposit 14 can be easily removed by the scraping member 4. Removed. At this time, if the contact portion 4b of the scraping member 4 is shaped as in the second embodiment, the deposit 14 can be more effectively removed. The contact portion 4b of the scraping member 4 slides while being in surface contact with the outer peripheral surface of the fluid pipe 13, so that the outer peripheral surface of the fluid pipe 13 is scratched or the anticorrosion treatment layer on the outer peripheral surface is peeled off. Is prevented.

  In addition, the rough surface portion 5 is separated from the outer peripheral surface of the fluid pipe 13 due to the spacing maintaining action of the plurality of scraping members 4, and a gap S is formed between the opposed surfaces, so that the rough surface portion 5 becomes the fluid pipe 13. Contact with the outer peripheral surface of the substrate is prevented. Therefore, there is no possibility that the rough surface portion 5 may damage the outer peripheral surface of the fluid pipe 13 or peel off the anticorrosion treatment layer on the outer peripheral surface.

  Further, a gap S is formed between the rough surface portion 5 and the outer peripheral surface of the fluid pipe 13, and the removed deposit 14 is quickly discharged from the gap S to the outside, so that the rough surface portion 5 is quickly clogged. The risk of doing so can be avoided.

  When the scraping member 4 or the rough surface portion 5 is worn during use of the fluid pipe scraper 1 or when used for the fluid pipe 13 having a different outer diameter or material, the handle 3 is removed as described above. The belt 2 can be replaced with another belt 2 or can be used with the front and back reversed like the fluid pipe scraper 1 of the third embodiment.

  The deposit 14 adhering to the vicinity of the upper surface of the fluid pipe 13 can be removed by winding the fluid pipe scraper 1 in a horizontal U-shape and reciprocating it.

  As described above, when the fluid pipe scraper 1 of the above embodiment is used, the flexible belt 2 is wound around the outer peripheral surface of the fluid pipe 13 at the construction site of the fluid pipe without using a large-scale mechanical device. The deposit 14 attached to the outer peripheral surface of the fluid pipe 13 is scraped off by the scraping member 4 and is scraped off by a simple operation of turning and gripping and moving the grip portion 3 of the fluid pipe scraper 1. The kimono 14 can be discharged and removed from the gap S, which is a space between the outer peripheral surface of the fluid pipe 13 and the surface of the belt 2.

  Further, the deposit 14 attached to the outer peripheral surface of the fluid pipe 13 can be efficiently removed in two steps by the rough surface portion 5 in addition to the scraping member 4, and the rough surface portion 5 is separated from the outer peripheral surface of the fluid pipe 13. Therefore, the rough surface portion 5 avoids the possibility of scratching the outer peripheral surface of the fluid pipe 13 or peeling off the anticorrosion treatment layer.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to the above-described embodiments, and the present invention can be modified or added within the scope not departing from the gist of the present invention. Included in the invention.

  For example, in the above embodiment, the plurality of scraping members 4 are provided so as to extend in the width direction orthogonal to the belt 2, but each scraping member 4 is the same as shown by a two-dot chain line in FIG. You may make it incline in a direction and you may provide it by making an inclination direction differ alternately.

  In the above embodiment, the scraping member 4 is composed of the foot piece 4a and the contact portion 4b, and the foot piece 4b is integrally attached to the upper surface of the fixed substrate 6 or fixed to the upper surface. Alternatively, the convex scraping member 4 may be directly fixed to the front or back surface of the belt 2 and the fixed substrate 6 may be omitted. In this case, the belt 2 can be formed of a flexible synthetic resin or the like, and the convex scraping member 4 can be integrally formed simultaneously with the formation of the belt 2.

  Furthermore, in the said Example, although the handle part 3 was attached to the both ends of the belt 2 so that attachment or detachment was possible, you may attach so that attachment or detachment is impossible. In the above embodiment, the user of the fluid pipe scraper grips and reciprocates the handle portion 3. For example, although not particularly shown, a separate drive unit for reciprocating the belt is provided so that the user can It is also possible to remove the deposits on the fluid pipe by simply reciprocating the belt by the drive unit.

  Needless to say, the number of scraping members 4 and the distance between them are appropriately changed according to the diameter of the fluid pipe 13 used and the length of the belt 2.

DESCRIPTION OF SYMBOLS 1 Fluid pipe scraper 2 Belt 2a Folding part 3 Handle part 3a Attachment piece 4 Scraping member 4a Foot piece 4b Abutting part 4c Arc surface 4d Inclined surface 5 Rough surface portion 6 Fixed substrate 6a Caulking piece 7 Hard protrusion 8 Substrate 9 Buckle 10 Fixing Lever 11 Bolt 12 Wing nut 13 Fluid pipe 14 Deposit

Claims (6)

A fluid pipe scraper for removing deposits adhering to the outer peripheral surface of the fluid pipe,
By projecting a plurality of scraping members capable of scraping off the adhering matter at predetermined intervals on the surface of a flexible belt having handle portions attached to both ends in the length direction, the surface of the belt is A fluid pipe scraper characterized in that the fluid pipe is separated from the outer peripheral surface of the fluid pipe.   2. The fluid pipe scraper according to claim 1, wherein a rough surface portion capable of scraping off the attached matter is provided on a surface of the belt between the scraping members adjacent to each other.   The fluid pipe scraper according to claim 2, wherein the rough surface portion is formed by a number of hard protrusions having sharp tips.   The fluid pipe scraper according to any one of claims 1 to 3, wherein a contact surface of the scraping member with the outer peripheral surface of the fluid pipe is an arc surface that can come into surface contact with the outer peripheral surface of the fluid pipe.   The scraper for fluid pipes according to any one of claims 1 to 4, wherein both ends of the scraping member in the length direction are gradually sharpened toward the tip.   The fluid pipe scraper according to any one of claims 1 to 5, wherein the grip portion is detachably attached to both end portions of the belt.

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