JP2011016084A - Apparatus of removing foreign material and method of removing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus of removing a foreign material to remove the foreign material which exists inside a tubular body such as a steel pipe.SOLUTION: A nozzle body 2 attached to an end of a support 3 changes a flow direction of a washing fluid F supplied through a fluid supply route 4 in the support 3 to jet the jet fluid f of the opposite direction to a supply direction. After the nozzle body is inserted from the opening of the tubular body 1, the jet fluid is radiated to the inside of the tubular body. The foreign material is scraped from the inner wall surface of the tubular body and discharged or extruded toward the opening into which the nozzle body is inserted.

Description

  The present invention relates to a foreign matter removing apparatus for removing foreign matter existing inside a tubular body such as a steel pipe and a method for removing the foreign matter.

  Conventionally, for example, during the manufacture of a steel pipe or during cutting and processing, foreign matters such as iron scraps and metal chips may be generated, and the foreign matters may remain attached to the inner and outer surfaces of the steel pipe. This foreign matter is not preferable as a product, and also affects the processing in the subsequent process, so this foreign matter must be removed. However, in the case of a steel pipe having a relatively large diameter, the foreign matters can be easily removed and the inner and outer surfaces can be cleaned, but in the case of a steel pipe having a small diameter and a long length. It is not easy to remove foreign substances existing in the steel pipe.

  Therefore, in order to clean the inside of such a steel pipe, air or the like is blown from one opening of the steel pipe and foreign matter is discharged from the other opening. Moreover, in order to clean the oil etc. adhering to the inner surface of the steel pipe, a cleaning liquid such as an organic solvent is sprayed inside the steel pipe to remove the oil etc.

  As a cleaning method using water or the like, it has been proposed to spray a spray of cleaning liquid onto a thin tube such as a steel pipe at a high pressure (see, for example, Patent Document 1). However, the cleaning method for spraying the spray of the cleaning liquid requires a large sealed chamber, which causes a problem that the equipment cost becomes high. Further, when water or the like is used, there is a problem that stains due to scale remain and discoloration may occur.

  As a avoiding cleaning method for solving this problem, it has been proposed to spray fine carbon dioxide particles onto a metal tube (see, for example, Patent Document 2). In this cleaning method, when carbon dioxide particles sublimate, oils and fats and the like adhering to a metal pipe such as a steel pipe are removed. Therefore, the cleaning is effectively performed without causing scale, and the organic solvent is not used, so that environmental pollution does not occur.

JP 7-124631 A JP 2000-140782 A

  However, in the conventional cleaning methods proposed in Patent Documents 1 and 2 and the like, the cleaning fluid is sprayed from the opening of the steel pipe, and the foreign matter adhering to the inner surface of the steel pipe is removed from the opening on the opposite side. It is discharged or pushed out together. Therefore, in order to use this cleaning method for cleaning the inside of a steel pipe, both ends of the steel pipe need to be opened, and this cleaning method cannot be used when one end of the steel pipe is closed. In this case, it is difficult to remove the foreign matter existing inside the steel pipe.

  On the other hand, even when both ends of the steel pipe are open, in a steel pipe in which one opening is narrower than the other opening, the cleaning fluid is ejected from one opening. Is not smoothly discharged from the other opening, and the foreign matter adhering to the inner surface of the steel pipe may not be sufficiently discharged or pushed out from the other opening, and may not be completely removed.

  Further, in the steel pipe cleaning method according to the prior art, the cleaning fluid is jetted from one opening of the steel pipe and discharged from the other opening. Therefore, the foreign matter removed from the inside of the steel pipe together with the cleaning fluid However, it was difficult to collect the foreign material.

  Moreover, even if both ends of the steel pipe are open, the method for cleaning the steel pipe according to the prior art, for example, when the steel pipe is long, for example, a foreign object jets the cleaning fluid on one side. There is a problem in terms of equipment, such as the presence of an injection force that pushes out this foreign material to the other opening, and the length of the steel pipe to be cleaned Naturally there were limitations.

  Therefore, in the present invention, when removing foreign matter existing inside the tubular body such as a steel pipe, the cleaning fluid can be jetted from the nozzle body inserted into the tubular body toward the inserted opening, It is an object of the present invention to provide a foreign matter removing device and a method for removing foreign matter that can discharge foreign matter from the opening.

  In order to solve the above problems, according to the present invention, in a foreign matter removing apparatus that removes foreign matter existing inside a tubular body, a nozzle body provided with a plurality of injection holes for ejecting fluid, and the nozzle body as the tubular body. A plurality of injection holes that face the opening side of the tubular body when the nozzle body is inserted into the tubular body. The fluid supply passage for supplying the fluid to the nozzle body is provided.

  The plurality of injection holes are arranged at equal intervals on a circumference centered on the axis of the nozzle body, and further inclined toward the inner wall side of the tubular body with respect to the axis of the nozzle body. The fluid is supplied when the nozzle body is pulled out after being inserted into the tubular body.

  The support body is a tube body including the fluid supply path therein, and the tube body is attached to a support device, and the support device drives the tube body so that the nozzle body is connected to the tubular body. The support body is attached to a support device in alignment with the axis of the tubular body, and the support device drives the tubular body in the axial direction of the tubular body to support the nozzle. The main body is inserted into or extracted from the tubular body, or the tubular body is a flexible tubular body including the fluid supply path therein.

  The fluid is a gas or a liquid, and further includes a cleaning medium.

  Further, in the foreign matter removing method of the present invention, fluid is ejected from the nozzle body inserted into the tubular body toward the opening of the tubular body, and foreign matter present inside the tubular body is removed from the tubular body. Further, the fluid is removed to the outside, and the fluid is uniformly ejected into the tubular body around the axis of the nozzle body.

  The fluid is injected while being inclined toward the inner wall side of the tubular body with respect to the axis of the nozzle body, or when the nozzle body is drawn out after being inserted into the tubular body. It was decided to be injected from the main body.

  As described above, the foreign matter removing apparatus of the present invention includes a nozzle body provided with a plurality of injection holes for ejecting fluid, and a support body for inserting the nozzle body into the tubular body. A fluid is ejected from the nozzle body inserted into the tubular body toward the opening of the tubular body, and the foreign matter existing inside the tubular body is removed to the outside of the tubular body. Even in the case where there is only one, the foreign matter existing inside the tubular body can be discharged from the opening and collected.

  Further, in the foreign matter removal according to the present invention, since the fluid is ejected from the plurality of ejection holes inside the tubular body, the ejected fluid ejects the entire surface of the tubular body and efficiently scrapes the foreign matter adhering to the inner surface. Thus, the foreign matter can be easily removed and collected even with a single operation.

It is a figure explaining the outline | summary of the foreign material removal apparatus by this embodiment. It is a figure explaining the specific example 1 of the foreign material removal apparatus by this embodiment. It is a figure explaining the specific example 2 of the foreign material removal apparatus by this embodiment.

  Next, embodiments of the foreign matter removing apparatus and the removing method according to the present invention will be described below with reference to FIGS.

  FIG. 1 shows an outline of the foreign matter removing apparatus according to the present embodiment, and the schematic configuration of the foreign matter removing apparatus is described focusing on the flow of the cleaning fluid supplied into the tubular body. Reference numeral 1 shown in the drawing represents a circular tubular body, 2 represents a nozzle body inserted into the tubular body 1, and 3 represents a support body provided with the nozzle body 2 at the tip. ing. Further, the white arrow indicates the flow of the cleaning fluid F. In the illustrated foreign matter removing apparatus, the support 3 itself is formed of a pipe, and the inside thereof is a fluid supply path 4 for the cleaning fluid F.

  In FIG. 1, the nozzle body 2 is shown inserted from one opening of the tubular body 1. The nozzle body 2 is provided with a structure that changes the flow direction of the cleaning fluid F supplied via the fluid supply path 4 in the support 3. That is, the supplied cleaning fluid F becomes a jet fluid f in the direction opposite to the supply direction inside the nozzle body 2 and is radiated into the tubular body 1 as shown in the figure. The direction of the jet fluid f is toward the one opening of the tubular body 1.

  The cleaning fluid F is supplied to the nozzle body 2 via the fluid supply path 4 in the support body 3, the direction of the flow is changed in the nozzle body 2, and becomes a jet fluid f to enter the inside of the tubular body 1. Radiated. In order to generate the ejection fluid f, the nozzle body 2 is formed with a plurality of ejection holes or slits communicating with the fluid supply path 4, and the plurality of ejection holes or slits are supplied to the cleaning fluid F to be supplied. The direction of the flow is opposite to the direction of the flow.

  Even if the jetting fluid f from the plurality of jetting holes or slits is radiated in parallel with the support 3, it can remove the foreign matter c adhering to the inner wall of the tubular body 1 and push it out to the opening of the tubular body 1. In order to further enhance the removal of the foreign substance c, it is preferable to incline toward the inner wall side of the tubular body 1 with respect to the axis of the nozzle body 2 as shown in FIG.

  By inclining in this way, the jet fluid f hits the inner wall of the tubular body 1 and the foreign matter c can be blown off. When a cleaning medium such as an organic solvent is mixed in the cleaning fluid, dirt such as oil is efficiently removed. Can be removed well. Further, in order to ensure the removal of the foreign substance c, the ejection openings of the plurality of ejection holes or slits are shifted in the circumferential direction so that the ejection fluid f becomes a spiral flow in the direction of the opening of the tubular body 1. You can also.

  Moreover, it is preferable that the nozzle body 2 has a circular cross section and has a tip that is convex so that it can be easily inserted into the tubular body 1. Of course, the size of the nozzle body 2 can be inserted into the tubular body 1, but the nozzle body 2 is inserted into the tubular body 1, and the nozzle body 2 is inserted into the tubular body 1. An appropriate space exists between the inner wall of the tubular body 1 and the nozzle body 2 so that the foreign substance c is not pushed further into the back by the nozzle body 2 when pushed into the interior. The diameter of the nozzle body 2 is selected. At least the size of the foreign material c is required.

  The plurality of injection holes or slits provided in the nozzle body 2 are preferably openings of the same size and are arranged at equal intervals on a circumference centered on the axis of the nozzle body 2. Thereby, since the jetting fluid f jetted from the plurality of jetting holes or slits becomes uniform and can be prevented from being biased, the remaining of the foreign matter c can be eliminated.

  As shown in FIG. 1, the support 3 of the foreign matter removing apparatus may be constituted by a single pipe, and the inside of the pipe itself may be a fluid supply path 4. However, the configuration of the support 3 is not limited to this, and for example, the pipe for the fluid supply path 4 may be provided separately from the pipe for the support 3. In addition, a flexible tube made of resin or metal can be used for the support 3. The fluid supply path 4 is connected to a cleaning fluid supply device.

  Although not shown, the support 3 of the foreign matter removing device is held movably by the support device. When the support device drives the support body 3, the nozzle body 2 is inserted from, for example, an opening at one end of the horizontally disposed tubular body 1 or pulled out from the tubular body 1. In addition, it is not restricted to the case where the support body 3 is hold | maintained by a support apparatus, An operator can also hold the support body 3 by hand and can perform a foreign material removal operation | work. In particular, when the support 3 is a flexible tube made of resin or metal, it is suitable for removing foreign matter in the tubular body 1 that is performed manually. In addition, you may make it transfer the tubular body which should remove a foreign material instead of driving a support body. In this case, the support body 3 is attached to the support device in accordance with the axis of the tubular body 1, and the support device drives the tubular body 1 in the axial direction of the tubular body to move the nozzle body 2 to the tubular body. It will be inserted into or pulled out from inside 1.

  When the foreign matter c present in the tubular body 1 is removed using the foreign matter removing apparatus described above, first, the nozzle body 2 is moved beyond the position where the foreign matter c exists from one opening of the tubular body 1. Then, the cleaning fluid F is supplied from the supply device to the nozzle body 2, and the nozzle body 2 is moved toward the one opening while the injection fluid f is injected into the tubular body 1. Specifically, it is pulled out from the opening. At this time, the foreign substance c adhering to the inner wall of the tubular body 1 is removed from the inner wall by the jet fluid f ejected from the moving nozzle body 2, and is further pushed out to the one opening and prepared in the opening. Captured and collected by the collected collection device.

  In the above, the case of foreign matter removal by one operation has been described, but this foreign matter removal operation can be repeated depending on the foreign matter removal status. Further, in the above, after the nozzle body 2 is inserted until it exceeds the position where the foreign substance c exists, the nozzle body 2 is moved toward one opening while the jet fluid f is jetted into the tubular body 1. However, the injection fluid f is injected into the tubular body 1 during the insertion of the nozzle body 2, or the injection fluid f is inserted into the tubular body 1 during the insertion of the nozzle body 2 and during the withdrawal of the nozzle body 2. It is also possible to inject.

  Further, the case where the cross section of the tubular body 1 is circular has been described so far. However, the foreign substance removing device described above is not limited thereto, and the cross section can be applied to a polygon, for example, a hexagon, an octagon, or the like. It is. Furthermore, although the steel pipe was mentioned as a typical example for the tubular body 1, it can be applied to a metal pipe made of iron, stainless steel, copper, or the like, or can be applied to a non-metallic pipe made of resin, ceramic, or the like. .

  Further, examples of the cleaning fluid supplied to the nozzle body 2 include gas and liquid, and the gas includes air, inert gas, and the like. If air is used, there is no environmental pollution and the cost is low. If an inert gas such as nitrogen is used, an oxidation reaction on the surface of the tubular body can be prevented. Furthermore, it is possible to use a gas mixed with powder particles, fine abrasive grains, and the like, and liquids include cleaning media such as water and organic solvents. As described above, the cleaning operation utilizing the characteristics of the cleaning fluid can be performed by selecting the cleaning fluid. If a higher cleaning power is required, the supply pressure of the cleaning fluid may be increased.

  In the above, the embodiment of the present invention has been described in accordance with the outline of the foreign matter removing apparatus shown in FIG. 1. Next, referring to FIGS. 2 and 3, specific examples 1 and 2 according to the embodiment of the present invention will be described. explain.

(Specific example 1)
FIG. 2 shows a specific example 1 of the foreign matter removing apparatus according to the present embodiment. In FIG. 2, the same parts as those in the foreign substance removing apparatus shown in FIG. In the specific example 1 of the foreign matter removing apparatus shown in FIG. 2, the structure of the nozzle body 2 is embodied and has the same function as the nozzle body 2 shown in FIG. 1 is embodied by cutting out from columnar metal and embodying the foreign matter removing apparatus of FIG.

  As shown in FIG. 2A, the nozzle body 2 is composed of a head portion 21 and a body portion 22. The leading portion 21 has a conical shape with a sharp point. The body portion 22 includes a coupling portion that is continuous with the leading portion 21 and is coupled to the joint 6 for connection to the support 3. The leading portion 21 and the trunk portion 22 are integrally formed.

  A fluid supply path that communicates with the fluid supply path 4 formed in the support 3 is formed in the axial center of the head portion 21 and the body portion 22 that are integrally formed. A plurality of injection holes 5 which are perforated obliquely toward the tip end portion are provided so as to be connected to the tip end portion of the fluid supply path. The plurality of injection holes 5 are directed to the inner wall side of the tubular body 1 at a predetermined angle with respect to the central axis of the nozzle body 2.

  The predetermined angle relating to the plurality of injection holes 5 can be arbitrarily determined, but at least an angle is selected so that the injection fluid f injected from the injection holes 5 does not flow toward the head portion 21 of the nozzle body 2. In addition, the jet fluid f is selected so that foreign matter adhering to the inner wall surface of the tubular body 1 can be scraped off.

  FIG. 2B illustrates a case where the plurality of injection holes 5 in the head portion 21 of the nozzle body 2 have a circular opening and eight injection holes 5 are provided. The openings of these injection holes 5 are arranged at equal intervals on a circumference centered on the axis. The number of the injection holes 5 is appropriately determined based on the size of the nozzle body 2 and the supply amount of the cleaning fluid F, and is not limited to an even number but may be an odd number.

For example, in order to remove foreign substances such as metal chips existing in a steel pipe having a thickness of 3.5 mm and a diameter of 42.7 mm, a nozzle body having a diameter of 20 mm is manufactured and attached to a support body. Removed foreign material such as Kiriko. By supplying compressed air of 7 kgf / cm ^{2 to} the foreign matter removing device and pulling back the nozzle body while jetting air from the nozzle body, the foreign matter in the steel pipe is scraped out by the air flow, and foreign matters such as silicon Could be removed and recovered.

  In addition, a nozzle body having a diameter of 12 mm is inserted into a steel pipe having a thickness of 2.0 mm and a diameter of 27.2 mm, and foreign matters such as silicon adhering within 100 mm from the end of the pipe are removed and collected. I was able to.

(Specific example 2)
In the case of the specific example 1 shown in FIG. 2, the nozzle body can be made compact, so it can be said that the nozzle body is suitable for a tubular body having a relatively small diameter. FIG. 3 shows a specific example 2 which can be applied when it is convenient for removal.

  In the foreign matter removing apparatus of the specific example 2 shown in FIG. 3A, the same parts as those of the specific example 1 shown in FIG. The part of the foreign matter removing apparatus of the second specific example different from that of the first specific example is the structure of the nozzle body. In the first specific example, the nozzle body 2 is manufactured by integrally cutting the head portion 21 and the body portion 22, but in the second specific example, the head portion 21 and the body portion 22 are manufactured separately. Yes. The shape of the head portion 21 is a truncated cone.

  In Specific Example 2, as shown in FIG. 3A, the body portion 22 is coupled to the support body 3, and a reservoir chamber communicating with the fluid supply path 4 is formed in the body portion 22. . A plurality of injection holes 5 communicating with the reservoir chamber are formed in the surface of the body portion 22 facing the opening side of the tubular body 1. After the reservoir chamber and the plurality of injection holes are formed in the body portion 22, the head portion 21 and the body portion 22 are joined to complete the nozzle body 2. The method of using the nozzle body 2 is the same as in the specific example 2.

  Moreover, the example of arrangement | positioning of the several injection hole 5 in the foreign material removal apparatus of the specific example 2 is shown by FIG.3 (b). As the plurality of injection holes 5 in the body portion 22 of the nozzle body 2, a case where the openings are circular and eight injection holes 5 are provided is illustrated. The openings of these injection holes 5 are arranged at equal intervals on a circumference centered on the axis. The number of the injection holes 5 is appropriately determined in consideration of the size of the nozzle body 2 and the supply amount of the cleaning fluid F, and is not limited to an even number, and may be an odd number.

  The plurality of injection holes 5 are directed to the inner wall side of the tubular body 1 at a predetermined angle with respect to the central axis of the nozzle body 2 in the same manner as the provision method described in the outline of the foreign matter removing apparatus shown in FIG. Yes. In the case of the specific example 2, this predetermined angle is smaller than in the case of the specific example 1, but by pulling back the nozzle body while injecting air from the nozzle body, The foreign matter was scraped by the air flow, and foreign matters such as silicon were removed and recovered.

DESCRIPTION OF SYMBOLS 1 Tubular body 2 Nozzle main body 21 Leading part 22 Body part 3 Support body 4 Fluid supply path 5 Injection hole 6 Joint F Cleaning fluid f Injection fluid

Claims (15)

In the foreign matter removing apparatus that removes foreign matter existing inside the tubular body,
A nozzle body provided with a plurality of injection holes for injecting fluid;
A support for inserting the nozzle body into the tubular body,
The plurality of injection holes are directed toward the opening of the tubular body when the nozzle body is inserted into the tubular body,
The foreign body removing apparatus, wherein the support has a fluid supply path for supplying the fluid to the nozzle body.   The foreign matter removing apparatus according to claim 1, wherein the plurality of injection holes are arranged at equal intervals on a circumference centered on an axis of the nozzle body.   The foreign matter removing apparatus according to claim 2, wherein the plurality of injection holes are inclined toward an inner wall side of the tubular body with respect to an axis of the nozzle body.   The foreign matter removing apparatus according to any one of claims 1 to 3, wherein the fluid is supplied when the nozzle body is pulled out after being inserted into the tubular body. The support is a tube including the fluid supply path therein,
The tube is attached to a support device;
5. The foreign matter removing apparatus according to claim 1, wherein the support device drives the tube body to insert or pull out the nozzle body into the tubular body. 6. The support is attached to a support device in alignment with the axis of the tubular body;
The said support apparatus drives the said tubular body to the axial direction of this tubular body, and inserts or pulls out the said nozzle main body to the inside of the said tubular body, The Claim 1 thru | or 4 characterized by the above-mentioned. Foreign matter removal device.   The foreign matter removing apparatus according to claim 1, wherein the support is a flexible tube including the fluid supply path therein.   The foreign matter removing apparatus according to claim 1, wherein the fluid is a gas or a liquid.   The foreign matter removing apparatus according to claim 8, wherein the fluid includes a cleaning medium.   Foreign matter characterized by ejecting fluid from a nozzle body inserted into a tubular body toward an opening of the tubular body and removing foreign matter existing inside the tubular body to the outside of the tubular body Removal method.   The foreign matter removing method according to claim 10, wherein the fluid is uniformly ejected into the tubular body around the axis of the nozzle body.   12. The foreign matter removing method according to claim 10, wherein the fluid is injected while being inclined toward an inner wall side of the tubular body with respect to an axis of the nozzle body.   The foreign matter removal according to any one of claims 10 to 12, wherein the fluid is ejected from the nozzle body when the fluid is drawn out after the nozzle body is inserted into the tubular body. Method.   The foreign material removing method according to claim 10, wherein the fluid is a gas or a liquid.   The foreign matter removing method according to claim 14, wherein the fluid includes a cleaning medium.

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