JP2018176363A - Burr entry prevention tool for piping and piping connection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burr entry prevention tool which can prevent entry of burrs into the interior of piping.SOLUTION: A burr entry prevention tool for piping comprises: a support part which has an outer diameter such that the support part can be inserted into the interior of the piping from an end part of the piping; and a burr entry prevention part which is provided on an outer periphery on a side of a front end part of the support part, and has an outer diameter such that the burr entry prevention part can come into contact with the interior of the piping when the front end part of the support part is inserted into the interior of the piping from the end part of the piping. According to this configuration, entry of burr into the interior of the piping can be prevented.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method for preventing burrs from entering a pipe and a method for connecting the pipe.

  Patent Document 1 discloses a cleaning apparatus for piping. According to the cleaning apparatus, it is possible to suppress the excessive cleaning and the excess shortage of the pipe. As a result, when renewing equipment such as an air conditioner, existing piping can be reused.

Unexamined-Japanese-Patent No. 2004-44872

  However, in the cleaning device described in Patent Document 1, the burr generated after cutting the existing pipe is not taken into consideration. For this reason, after the said burr | flash is removed, it can approach into the inside of the existing piping. As a result, equipment failure may occur.

  This invention was made in order to solve the above-mentioned subject. An object of the present invention is to provide a burr ingress protection device for piping and a method of connecting piping, which can prevent the burr from entering the inside of the piping.

  The burr entry preventing tool for piping according to the present invention is provided on a support portion having an outer diameter which can be inserted into the inside of the pipe from an end of the pipe, and provided on the outer periphery on the front end portion side of the support portion And a burr entry preventing portion having an outer diameter capable of coming into contact with the inside of the pipe when the front end of the portion is inserted into the inside of the pipe from the end of the pipe.

  According to the piping connection method of the present invention, the existing piping cutting step of cutting the existing piping, and the burr intrusion preventing portion of the burr intrusion preventing tool from the cut end portion of the existing piping In the state of being inserted into the inside of the existing pipe from the cut end portion of the existing pipe, the burr inward insertion part inserted into the inside, and the burr incursion prevention part of the burr intromission part is inserted into the inside of the existing pipe A burr removing step of removing burrs from the cut end of the pipe; and a burr entry removing step of drawing out the burr approach preventing tool from the cut end of the existing pipe in a state where the burr is removed; And a new pipe connecting step of connecting an end of the new pipe to the cut end of the existing pipe.

  According to these inventions, when the front end portion of the support portion is inserted into the inside of the pipe from the end of the pipe, the burr approach prevention portion contacts the inside of the pipe. For this reason, when the burrs move to the back side inside the pipe, the burrs are inhibited from moving by the burr intrusion prevention unit. As a result, burrs can be prevented from entering the inside of the pipe.

It is a figure for demonstrating the burr removal of piping to which the burr approach prevention tool of piping in Embodiment 1 of this invention is applied. It is a side view of the burr approach prevention tool of piping in Embodiment 1 of this invention. It is a perspective view which shows the state by which the burr approach prevention tool of piping in Embodiment 1 of this invention was inserted in the inside of the end part of piping. It is a perspective view which shows the state in the middle of pulling out the burr approach prevention tool of piping in Embodiment 1 of this invention from the inside of the end part of piping. It is a flowchart for demonstrating the connection method of piping to which the burr approach prevention tool of piping in Embodiment 1 of this invention is applied. It is a side view of the burr approach prevention tool of piping in Embodiment 2 of this invention.

  An embodiment of the present invention will be described with reference to the attached drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals. The overlapping description of the relevant parts is simplified or omitted as appropriate.

Embodiment 1
FIG. 1 is a view for explaining the deburring of piping to which the burr ingression preventing device for piping according to a first embodiment of the present invention is applied.

  In FIG. 1, the outdoor unit 1 of the air conditioner is provided outside the building. For example, the outdoor unit includes a compressor 1a, a fan 1b, and a substrate 1c. The pipe 2 connects the outdoor unit 1 of the air conditioner and the indoor unit. The pipe 2 is formed in a hollow shape so that the refrigerant flows between the outdoor unit 1 and the indoor unit.

  When the air conditioner is renewed, the pipe 2 is disconnected on the outdoor unit 1 side. Thereafter, the existing outdoor unit 1 is carried out. Thereafter, the newly installed outdoor unit 1 is carried in. Thereafter, the end of the newly installed pipe provided on the side of the newly installed outdoor unit 1 and the end of the existing pipe 2 are connected.

  When the existing pipe 2 is cut, burrs are generated at the cut end of the existing pipe 2. When the said burr | flash is removed by the deburring cutter etc. which are not shown in figure, the burr approach prevention tool 3 is used.

Next, the usage method of the burr approach prevention tool 3 is demonstrated using FIGS. 2-4.
FIG. 2 is a side view of the burr intrusion preventing tool for piping in accordance with the first embodiment of the present invention. FIG. 3 is a perspective view showing a state in which the burr intrusion preventing tool for piping according to Embodiment 1 of the present invention is inserted into the end of the piping. FIG. 4 is a perspective view showing a state in the middle of being pulled out from the inside of the end portion of the pipe, according to the first embodiment of the present invention.

  As shown in FIG. 2, the burr entry prevention tool 3 includes a support portion 4, a grip portion 5 and a burr entry prevention portion 6.

  The support 4 has an outer diameter that can be inserted into the inside of the pipe 2 from the end of the pipe 2. For example, the support 4 is formed in a bar shape. For example, the support 4 is formed of metal.

  The grip 5 is provided on the rear end side of the support 4. The gripping portion 5 is formed to be gripped by a worker. For example, the grip 5 is formed of resin.

  The burr entry preventing portion 6 is provided on the outer periphery on the front end side of the support portion 4. The burr entry preventing portion 6 has an outer diameter that can contact the inside of the pipe 2 when the front end portion of the support portion 4 is inserted into the inside of the pipe 2 from the end of the pipe 2. For example, the burr entry prevention portion 6 is formed of an elastic member having an outer diameter larger than the inner diameter of the pipe 2. For example, the burr entry prevention unit 6 is formed of a sponge. For example, the burr entry prevention unit 6 is formed of rubber.

  As shown in FIG. 3, before the burrs at the end of the pipe 2 are removed, the burr entry prevention unit 6 is inserted into the pipe 2 from the end of the pipe 2. At this time, the burr entry preventing portion 6 is elastically deformed to fill the gap with the inner periphery of the pipe 2. As a result, the outer periphery of the burr entry prevention portion 6 is in close contact with the inner periphery of the pipe 2. Thereafter, when the burrs are removed, the burrs may move toward the back of the inside of the pipe 2. At this time, the burr is prevented from moving by the burr entry prevention unit 6.

  As shown in FIG. 4, after the burrs are removed, the burr entry prevention unit 6 is pulled out of the inside of the pipe 2. At this time, the burr moves from the inside of the pipe 2 to the outside following the movement of the burr entry prevention unit 6.

Next, the outline of the method of connecting the pipes 2 will be described with reference to FIG.
FIG. 5 is a flow chart for explaining the piping connection method to which the burr ingression preventing device for piping according to the first embodiment of the present invention is applied.

  In step S1, an existing pipe cutting step is performed. Specifically, the existing pipe 2 is cut. For example, on the side of the existing outdoor unit 1 of the air conditioner, the existing piping 2 extending in the vertical direction is cut. At this time, flare processing is performed on the cut end of the existing pipe 2.

  Thereafter, in step S2, a burr entry prevention tool insertion step is performed. Specifically, the burr entry prevention portion 6 of the burr entry prevention tool 3 is inserted into the existing piping 2 from the cut end of the existing piping 2. For example, the burr entry preventing portion 6 of the burr entry preventing tool 3 is inserted into the existing piping 2 from the cut upper end of the existing piping 2.

  Thereafter, in step S3, a burr removing step is performed. Specifically, the cut end of the existing pipe 2 is inserted in the state where the burr entry prevention part 6 of the bar 3 is inserted from the cut end of the existing pipe 2 into the existing pipe 2. Burr of the department is removed. For example, in a state where the burr entry preventing portion 6 of the burr entry preventing tool 3 is inserted into the existing pipe 2 from the cut upper end of the existing pipe 2, the burr of the cut upper end of the existing pipe 2 Is removed.

  Thereafter, in step S4, a burr ingression device withdrawing process is performed. Specifically, the burr entry prevention tool 3 is pulled out from the cut end of the existing pipe 2 in a state where the burr is removed.

  Thereafter, in step S5, a new piping connection process is performed. Specifically, the end of the new pipe is connected to the cut end of the existing pipe 2. For example, the lower end of the newly installed piping provided in the outdoor unit 1 of the newly installed air conditioner is connected to the cut upper end of the existing piping 2.

  According to the first embodiment described above, the burr entry preventing portion 6 contacts the inside of the pipe 2 when the front end portion of the support portion 4 is inserted into the inside of the pipe 2 from the end of the pipe 2. For this reason, when the burrs move to the back side inside the pipe 2, the burrs are inhibited from moving by the burr intrusion preventing unit 6. As a result, the burr can be prevented from entering the inside of the pipe 2.

  For example, when the burr approach prevention tool 3 is applied to piping of an air conditioner, clogging of the burr can be prevented in the strainer, the expansion valve, the compressor 1a, and the like. As a result, it is possible to prevent the failure of the air conditioner such as the refrigerant circulation failure, the refrigerant leakage, and the like.

  In addition, the burr entry preventing portion 6 is formed of an elastic member having an outer diameter larger than the inner diameter of the pipe 2. Therefore, the outer periphery of the burr entry prevention portion 6 can be brought into close contact with the inner periphery of the pipe 2. As a result, the burr can be more reliably prevented from entering the inside of the pipe 2.

  At this time, the burr approach prevention tool 3 is held at the end of the pipe 2. For this reason, the worker can remove the burr without worrying that the burr enters the inside of the pipe 2 also in the place and the posture.

  In particular, even if the burr is removed from the cut end of the existing pipe 2 extending in the vertical direction, the burr can be prevented from entering the inside of the pipe 2. Therefore, most of the existing pipes 2 can be reused. As a result, the new piping can be shortened. For this reason, the material cost of new piping can be reduced.

  The length of the support portion 4 may be set as appropriate. For example, the length of the support 4 may be set so as not to disturb the removal of burrs. For example, the length of the support 4 may be set so as not to prevent the use of the deburring cutter when removing the burrs.

Second Embodiment
FIG. 6 is a side view of a burr ingression preventing device for piping according to a second embodiment of the present invention. The same reference numerals as in the first embodiment denote the same or corresponding parts. The description of the relevant part is omitted.

  As shown in FIG. 6, the burr approach prevention tool 3 according to the second embodiment includes a burr scattering prevention unit 7 and a movement restriction unit 8 in addition to the support 4 and the burr entry prevention unit 6.

  The burr scattering prevention unit 7 is provided on the support unit 4. For example, the burr scattering prevention unit 7 is provided on the side of the rear end portion of the burr entry preventing unit 6 in the support unit 4. The burr scattering prevention unit 7 is formed of a ferromagnetic material.

  The movement restricting portion 8 is provided on the side of the rear end portion of the support portion 4. The movement restricting portion 8 has an outer shape larger than the inner diameter of the pipe 2 not shown in FIG. For example, the movement restricting portion 8 is provided to be orthogonal to the rear end portion of the support portion 4 at the central portion.

  In addition, the support part 4 of Embodiment 2 is provided with the 1st detachment prevention part 9 and the 2nd detachment prevention part 10. FIG. The first detachment prevention portion 9 is provided on the side of the tip end portion of the burr entry prevention portion 6 in the support portion 4. The first detachment prevention portion 9 prevents the burr entry prevention portion 6 from coming off the side of the tip end portion of the support portion 4. The second detachment prevention portion 10 is provided on the side of the rear end portion of the burr entry prevention portion 6 in the support portion 4. The second detachment prevention portion 10 prevents the burr entry prevention portion 6 from coming off the side of the rear end portion of the support portion 4.

  Further, the burr entry preventing portion 6 of the second embodiment is formed such that the outer diameter of the rear end portion is larger than the outer diameter of the front end portion.

  According to the second embodiment described above, the burr entry preventing portion 6 is formed such that the outer diameter of the rear end portion is larger than the outer diameter of the front end portion. For this reason, it is possible to reliably close the gap between the outer periphery of the burr ingress preventing portion 6 and the inner periphery of the tube 2 while making it easy to insert the burr ingress preventing portion 6 into the inside of the pipe 2.

  Moreover, the burr scattering prevention unit 7 is formed of a ferromagnetic material. For this reason, the removed burrs are adsorbed to the burr scattering prevention unit 7. As a result, the removed burr can be reliably collected by the burr scattering prevention unit 7.

  In particular, if the burr scattering prevention unit 7 is provided on the side of the rear end portion of the burr entry preventing unit 6 in the support unit 4, the removed burr can be efficiently collected by the burr scattering prevention unit 7.

  In addition, the movement restriction unit 8 has an outer shape larger than the inner diameter of the pipe 2. When the burr entry prevention tool 3 is inserted into the inside of the pipe 2 too much, the movement restricting portion 8 contacts the end of the pipe 2. For this reason, it can prevent that the burr approach prevention tool 3 gets into the back | inner side of the inside of the piping 2, and can not be pulled out too much.

  In addition, you may apply the burr approach prevention tool 3 of Embodiment 1 or Embodiment 2 to piping of a ceiling. Moreover, you may apply the burr approach prevention tool 3 of Embodiment 1 or Embodiment 2 to piping of water. Also in these cases, the burr can be prevented from entering the inside of the pipe 2.

  Moreover, according to the kind of piping 2, a different internal diameter is set. On the other hand, in the burr entry preventing tool 3 of the first embodiment and the second embodiment, the burr entry preventing portion 6 is elastically deformed. For this reason, it can be applied to all the pipes 2 in the type of burr entry preventing portion 6 which is smaller than the type of the pipe 2.

  1 outdoor unit, 1a compressor, 1b fan, 1c substrate, 2 piping, 3 flash entry prevention tool, 4 support section, 5 grip section, 6 flash entry prevention section, 7 flash scatter prevention section, 8 movement control section, 9th 1 Release Stop, 10 2nd Release Stop

Claims (8)

A support with an outer diameter that can be inserted into the interior of the pipe from the end of the pipe;
It is provided on the outer periphery on the front end side of the support portion, and has an outer diameter capable of contacting the inside of the pipe when the front end portion of the support portion is inserted into the inside of the pipe from the end of the pipe A burr entry prevention unit,
Burr entry prevention tool for piping equipped with.   The burr ingress preventing device for piping according to claim 1, wherein the burr ingress preventing portion is formed of an elastic member having an outer diameter larger than an inner diameter of the pipe.   The burr ingression preventing device for piping according to claim 2, wherein the burr ingress preventing portion is formed such that the outer diameter of the rear end portion is larger than the outer diameter of the front end portion. A burr scattering prevention portion provided on the support portion and formed of a ferromagnetic material,
The burr entry preventing tool for piping according to any one of claims 1 to 3, further comprising:   5. The burr ingress preventing device for piping according to claim 4, wherein the burr scattering preventing portion is provided on a side of a rear end portion of the burr ingress preventing portion in the support portion. A movement restricting portion provided on the side of the rear end portion of the support portion and having an outer shape larger than the inner diameter of the pipe;
The burr entry preventing tool for piping according to any one of claims 1 to 5, further comprising: Existing piping cutting process for cutting existing piping;
The burr approach prevention tool which inserts the burr approach prevention part of the burr approach prevention tool according to any one of claims 1 to 6 from the cut end of the existing pipe into the inside of the existing pipe An insertion process,
The burr in the cut end portion of the existing pipe is removed in a state where the burr entrance prevention portion of the burr entrance prevention device is inserted into the existing pipe from the cut end portion of the existing pipe Burr removal process,
A burr entry preventing device extracting step of extracting the burr entry preventing device from the cut end of the existing pipe in a state where the burr is removed;
A new pipe connecting step of connecting an end of the new pipe to the cut end of the existing pipe;
How to connect a pipe equipped with The existing pipe cutting step is a step of cutting the existing pipe extending in the vertical direction on the side of the existing outdoor unit of the air conditioner,
The burr entry prevention tool insertion step is a step of inserting the burr entry prevention portion of the burr entry prevention tool into the existing piping from the cut upper end of the existing piping,
In the burr removing step, the burr upper end portion of the existing piping is cut in a state where the burr intrusion preventing portion of the burr intrusion prevention tool is inserted into the existing piping from the upper end portion where the existing piping is cut. It is a process to remove the burr of the part,
The burr entry preventing device withdrawal step is a step of withdrawing the burr entry preventing device from the cut upper end of the existing pipe in a state where the burr is removed,
8. The piping according to claim 7, wherein the new piping connection step is a step of connecting the lower end of the new piping provided in the outdoor unit of the air conditioner, to the disconnected upper end of the existing piping. How to connect

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