JP2018043187A - Cleaning device and cleaning method of inner surface of pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning device and a cleaning method of a pipe capable of removing deposits on the inner surface of the pipe without damaging a cylindrical body having at least one pipe at a side surface and to provide a production method of the cylindrical body having at least one pipe at the side surface using the cleaning method.SOLUTION: In a cleaning device being used for the inside cleaning of a pipe in a cylindrical body having at least one pipe at a side surface and including a nozzle having an opening injecting a fluid and a member for positioning to the pipe, the axis line of the pipe fixed with the member for positioning and the axis line of the nozzle are satisfied with concentricity<(φA-φB)/2 when the minimum value of the inside diameter of the pipe is φA and the maximum value of the outside diameter in a part inserted to the inside of the nozzle pipe is φB.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a pipe cleaning device provided on a side surface of a cylindrical body, a cleaning method, and a method for manufacturing a cylindrical body having at least one pipe on the side surface using the cleaning method.

  Conventionally, regarding the cleaning of a cylindrical body used for a metering pump or the like, for example, in a cylindrical body having at least one tube on its side surface such as the metering pump shown in FIG. May stick. In the metering pump as shown in FIG. 1, it is known that if foreign matter is mixed in the manufacturing process, the accuracy of the liquid feeding amount is deteriorated, or the foreign matter is caught in the sliding portion and damages the cylindrical body. It was.

  However, it has also been known that when the inner surface of a pipe is cleaned using a jig or the like to remove foreign substances, the jig may interfere with the product and damage the product.

  Therefore, as a conventional apparatus and method for cleaning the inner surface of the tube, as in Patent Document 1, by rubbing the inner surface of the tube with a rotating brush, the foreign matter is peeled off, and then an air nozzle is inserted into the tube and blown off with an air blow. A cleaning device and method for suction has been proposed.

  Further, as in Patent Document 2, a method has been proposed in which a cleaning nozzle provided with injection ports in a plurality of directions is inserted into a pipe to inject cleaning liquid.

Japanese Patent Laid-Open No. 2006-167637 JP 2005-87804 A

  However, in the method of Patent Document 1, the positioning of the tube, the brush, and the air nozzle is insufficient, and there is a possibility that the tube may be damaged due to interference between the two.

  Further, in the method of Patent Document 2, since the cleaning nozzle is inserted into the pipe while spraying the cleaning liquid in a plurality of directions, there is a possibility that the foreign matter separated from the pipe may be pushed into the product.

  In addition, in both Patent Documents 1 and 2, in the case where the object to be cleaned is provided with product parts in the tube axis direction, there is a risk of collision with the parts and damage to the product when the nozzle insertion distance is increased.

  Therefore, in view of the above-described problems, the present invention cleans a tube that can remove deposits on the inner surface of the tube without damaging the tubular body having at least one tube on its side surface. An object is to provide an apparatus and a cleaning method. Moreover, it aims at providing the manufacturing method of the cylindrical body provided with the at least 1 pipe | tube using the cleaning method on the side surface.

  The present invention is intended to achieve the above object, and has one of the following configurations.

(1) A cleaning device used for cleaning the inside of the tube in a cylindrical body having at least one tube on its side surface,
A nozzle having an opening for ejecting fluid, and a positioning member for the tube;
When the inner diameter minimum value of the tube is φA and the outer diameter maximum value of the portion of the nozzle inserted into the tube is φB, the axis of the tube fixed by the positioning member and the axis of the nozzle Is a cleaning device that satisfies the relationship of coaxiality <(φA−φB) / 2.

  (2) The cleaning device according to (1), further including a support portion that allows the nozzle to reciprocate.

  (3) The cylindrical body satisfies the relationship of φC> φD, where φC is the outer diameter at the axial center position of the body of the cylindrical body and φD is the outer diameter at the end position of the tube. The cleaning device according to (1) or (2).

  (4) The cylindrical body is connected to the cylindrical body so that the distance Y is shorter than the total length X of the pipe in the axial direction of the pipe on the inner surface of the cylindrical body. The cleaning device according to any one of (1) to (3), wherein the cleaning device has an internally mounted component.

  (5) The cleaning device according to any one of (1) to (4), further including a measuring instrument that measures a displacement amount of the cylindrical body in the axial direction of the tube.

  (6) A method of cleaning the inside of the tube in a cylindrical body having at least one tube on a side surface, the step of fixing the tube with a positioning member, and a nozzle having an opening for ejecting fluid. A cylindrical shape having an operation of inserting into and extracting from the tube, and a step of ejecting fluid from the opening of the nozzle in at least one of the operation of inserting and extracting the nozzle Body inner surface cleaning method.

  (7) A method for manufacturing a cylindrical body having at least one tube on a side surface, the method including the step of cleaning the tube using the tube inner surface cleaning method according to (6).

  According to the present invention, a foreign body attached to the inner surface of the tube without damaging the inner surface of the tube and pushing the foreign material into the tube with respect to the cylindrical body having at least one tube on the side surface. Can be removed. Moreover, the cylindrical body provided with the at least 1 pipe | tube on the side surface can be obtained using the cleaning method of this invention.

It is a schematic longitudinal cross-sectional view of the metering pump which is an example of the cylindrical body provided with the at least 1 pipe | tube on the side surface. It is a schematic sectional drawing which shows an example of the cleaning apparatus of this invention. It is a schematic sectional drawing which shows an example of the nozzle in this invention.

  The present invention is a cleaning device used for cleaning the inside of a tube in a cylindrical body having at least one tube on a side surface, and includes a nozzle having an opening for ejecting fluid, and a positioning member for the tube. The tube axis fixed by the positioning member and the nozzle when the minimum inner diameter of the tube is φA and the maximum outer diameter of the nozzle inserted into the tube is φB Is a cleaning device that satisfies the relationship of coaxiality <(φA−φB) / 2. Moreover, it is the cleaning method, Furthermore, it is a manufacturing method of the cylindrical body provided with the at least 1 pipe | tube using the cleaning method on the side surface.

  In the cleaning device of the present invention, the cylindrical body has a relationship of φC> φD, where φC is an outer diameter at the axial center position of the barrel portion of the cylindrical body, and φD is an outer diameter at the end position of the tube. It is preferable to satisfy. Further, the cylindrical body is internally provided in the cylindrical body so that the distance Y is shorter than the total length X of the pipe in the axial direction of the pipe on the inner surface of the body portion of the cylindrical body. It is preferable to have the parts made.

  Specifically, the tip of the cylindrical tube is sealed, a nozzle provided with an opening for fluid ejection is used, the tube is a positioning member, the minimum inner diameter of the tube is φA, and the tube is inserted into the tube. When the maximum outside diameter of the nozzle at the position is φB, the axis of the tube fixed by the positioning member and the axis of the nozzle satisfy the relationship of coaxiality <(φA−φB) / 2. After positioning the tube in this state, a nozzle is inserted into the tube, a cleaning fluid is ejected from the hole at the tip of the nozzle, and the nozzle is pulled out of the tube. By doing so, it is possible to remove the adhering matter without damaging the inner surface of the tube and without pushing the foreign matter into the back, which is preferable. In addition, it is preferable to provide a displacement measuring device for measuring the displacement amount of the cylindrical body in order to detect a displacement when the positioning failure or the amount of nozzle penetration increases and the product is likely to collide with a component of the product. This is preferable because an abnormality can be detected at an early stage.

  Next, an example of the present invention will be described with reference to the drawings.

  1, a liquid outlet port 1 that is a pipe and a liquid inlet port 4 that is a pipe are provided on a side surface of a cylindrical plastic case 2 that is a cylindrical body, and a piston 3 that is a component of a metering pump is internally provided. Has been. At this time, as the device configuration of the metering pump, the outer diameter φD at the end portion of the liquid inlet port 4 and the liquid outlet port 1 provided on the side surface with respect to the outer diameter φC at the center of the barrel portion of the cylindrical plastic case 2 is It is preferable to satisfy the relationship of φC> φD. In addition, the internal piston 3 has the full length of the liquid inlet port 4 or the liquid outlet port 1 based on the joining position with the liquid inlet port 4 or the liquid outlet port 1 on the inner surface of the barrel portion of the cylindrical plastic case 2. When X is Y and the distance from the base point to the piston is Y, it is preferable to satisfy the relationship of X> Y. Of course, Y = 0, and a case where a piston exists at the joining position is also assumed.

  Next, referring to FIG. 2, first, the liquid inlet port 4 is positioned by the positioning member 6 with respect to the cylindrical plastic cylindrical case 2 provided with the liquid inlet port 4 of FIG. Thereafter, the nozzle 9 having an opening 10 capable of ejecting fluid in the vicinity of the tip is inserted into the liquid inlet port 4. At this time, when the minimum inner diameter of the liquid inlet port 4 is φA and the maximum outer diameter at the portion inserted into the liquid inlet port 4 of the nozzle 9 is φB, the liquid inlet fixed by the positioning member 6 is used. When the axis of the port 4 and the axis of the nozzle 9 satisfy the relationship of coaxiality <(φA−φB) / 2, the nozzle 9 can be inserted and removed without interfering with the liquid inlet port 4.

  Here, in the cleaning device of the present invention, it is preferable that the nozzle having the opening for ejecting the fluid is attached with a support portion that enables reciprocating motion, and the support portion is shown in FIG. The actuator 8 corresponds.

  In FIG. 2, it is preferable that after the nozzle 9 is inserted into the liquid inlet port 4, the nozzle 9 is moved from the liquid inlet port 4 by moving the nozzle 9 with respect to the pipe end direction while ejecting the cleaning fluid. The foreign material 7 can be removed.

  In removing foreign matter 7, it is preferable to always measure the amount of displacement in the horizontal and vertical directions of the cylindrical plastic case 5 with the displacement measuring device 5, and the interference between the liquid inlet port 4 and the nozzle 9, and between the piston 3 and the nozzle 9. By monitoring the presence / absence, even if interference occurs, it can be detected early.

  Although the material of the nozzle used for the cleaning apparatus of this invention is not specifically limited, A metal and a plastic are used suitably. Moreover, it is preferable that the fluid ejection hole provided near the nozzle tip is inclined toward the end of the tube as shown in FIG. 3, so that the adhering matter is mixed inside the cylindrical plastic case. It becomes possible to prevent.

  Further, the material of the support used for the cleaning device of the present invention, which enables the nozzle to reciprocate, is not particularly limited, but it is a pneumatic device such as an air cylinder, or a motor drive such as a single-axis robot. Equipment is preferably used.

  In addition, the positioning member used in the cleaning device of the present invention is not particularly limited, but a part for sandwiching and positioning a pipe between two V blocks is used for a pneumatic device such as an air cylinder or a single-axis robot. A system driven by such an electric device is preferably used.

  Moreover, the displacement measuring device used for the cleaning device of the present invention for measuring the displacement amount of the cylindrical body is not particularly limited, but a laser displacement meter, a proximity sensor, and a contact switch are preferably used.

  Moreover, the fluid ejected from the tip of the nozzle used in the cleaning device of the present invention is not particularly limited, but the use of air is preferably used since contamination with the product can be suppressed.

  A cylindrical plastic case 2 made of polypropylene used for the metering pump shown in FIG. 1 was prepared. A foreign substance 7 made of urethane resin is adhered to the inner surface of the liquid inlet port 4, and in the apparatus configured as shown in FIG. 2, the cylindrical plastic case 2 is placed on the base, and the liquid inlet port 4 is fixed by the positioning member 6. The nozzle 9 was inserted into the liquid inlet port 4 using the actuator 8. Next, as shown in FIG. 3, the cleaning fluid 11 (compressed air: dynamic pressure 0.4 MPa, flow rate 70 L / min) is ejected from the nozzle 9 (hole diameter φ0.5 mm, number of holes 20) and the nozzle 9 is driven by the actuator 8. Was extracted from the liquid inlet port 4. Thereafter, it was confirmed whether or not the foreign matter 7 on the inner surface of the liquid inlet port 4 was removed. When the above operation was repeated 100 times, it was confirmed that the foreign material 7 which is a polyurethane resin adhered inside was completely removed by 98 times.

  The present invention can be suitably used particularly for cleaning a cylindrical body used in a metering pump, a heat exchanger, a water purifier cartridge, a gas separation membrane, a device for purifying blood, and the like.

  The present invention is suitably used for cleaning the above-described metering pump, but the technical scope is not limited to the above-described embodiment, and uses such as cleaning without damaging the cleaning part, for example, emulsified product filling and oil It can be applied to the filling of material product cans.

1 pipe (liquid outlet port)
2 Tubular body (tubular plastic case)
3 Interior parts (piston)
4 pipe (liquid inlet port)
5 Displacement measuring instrument 6 Positioning member 7 Foreign object 8 Supporting part (actuator)
9 Nozzle 10 Opening 11 Cleaning fluid

Claims (7)

A cleaning device used for cleaning the inside of the tube in a cylindrical body having at least one tube on its side surface,
A nozzle having an opening for ejecting fluid, and a positioning member for the tube;
When the inner diameter minimum value of the tube is φA and the outer diameter maximum value of the portion of the nozzle inserted into the tube is φB, the axis of the tube fixed by the positioning member and the axis of the nozzle Satisfies the relationship of coaxiality <(φA−φB) / 2. Furthermore, the cleaning apparatus of Claim 1 with which the support part which makes a reciprocating motion possible is attached to the said nozzle. The cylindrical body satisfies a relationship of φC> φD, where φC is an outer diameter at the axial center position of the barrel portion of the cylindrical body, and φD is an outer diameter at the end position of the tube. Item 3. The cleaning device according to Item 1 or 2. The cylindrical body is internally mounted in the cylindrical body so that the distance Y is shorter than the total length X of the pipe in the axial direction of the pipe, based on the joining position with the pipe on the inner surface of the cylindrical body. The cleaning device according to claim 1, wherein the cleaning device has parts. Furthermore, the cleaning apparatus in any one of Claims 1-4 provided with the displacement measuring device which measures the displacement amount of the said cylindrical body in the axial direction of the said pipe | tube. A method of cleaning an inside of a tube in a cylindrical body having at least one tube on a side surface, the step of fixing the tube with a positioning member, and a nozzle having an opening for ejecting fluid inside the tube An operation of inserting into the tube and an operation of pulling out, and in at least one of the operation of inserting the nozzle and the operation of pulling out, includes a step of ejecting fluid from the opening of the nozzle Surface cleaning method. The manufacturing method of the cylindrical body provided with the at least 1 pipe | tube on the side surface including the process of cleaning a pipe | tube using the pipe inner surface cleaning method of Claim 6.

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