Cleaning nozzle auxiliary member and cleaning nozzle

Abstract

To suppress a cleaning nozzle from being caught in piping with a small bore diameter.SOLUTION: A cleaning nozzle auxiliary member 10 is used in a cleaning nozzle 16 that is attached to a distal end of a hose 12 and cleans the inside of piping 14. The cleaning nozzle auxiliary member is provided in a base part 18 of the cleaning nozzle 16 connected with the hose 12. The cleaning nozzle auxiliary member has an external size in the radial direction of the base part 18 larger than an external size of the base part 18. When the cleaning nozzle auxiliary member contacts an inner surface of the piping 14, the center of the hose 12 is caused to approach the center of the piping 14.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a cleaning nozzle auxiliary member and a cleaning nozzle.

Background Art

[0002] A cleaning nozzle for cleaning the inside of a pipe such as a drain pipe is disclosed (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0004] When high-pressure cleaning the inside of a pipe, the above-mentioned dedicated cleaning nozzle is used. This cleaning nozzle is selected according to the application and the pipe shape, and is attached to the tip of a hose and used. Although elbows, branches, etc. exist in the middle of the pipe, since general pipes have a large diameter of 50A or more, it is difficult for the nozzle to get caught inside the pipe during the pipe cleaning operation.

[0005] However, in a siphon drainage system, a relatively small-diameter pipe such as 20J may be used, or dedicated parts may be used, so the nozzle may get caught inside the pipe during the pipe cleaning operation.

[0006] An object of the present invention is to suppress the nozzle from getting caught inside a small-diameter pipe.

Means for Solving the Problems

[0007] The cleaning nozzle auxiliary member according to the first aspect is a cleaning nozzle auxiliary member used for a cleaning nozzle that is attached to the tip of a hose and cleans the inside of a pipe. It is used by attaching it to the base of the cleaning nozzle to which the hose is connected. It is configured such that its outer dimension is larger than the outer dimension of the base in the radial direction of the base, and by contacting the inner surface of the pipe, it brings the center of the hose closer to the center of the pipe.

[0008] This cleaning nozzle auxiliary member brings the center of the hose closer to the center of the pipe by contacting the inner surface of the pipe. As a result, contact between the hose and the inner surface of the pipe is suppressed. For this reason, it is possible to suppress the cleaning nozzle and the hose from coming into contact with and getting caught on the inner surface of a small-diameter pipe.

[0009] The second aspect is the cleaning nozzle auxiliary member according to the first aspect, wherein the cleaning nozzle auxiliary member has a plurality of convex portions on its outer periphery.

[0010] In this cleaning nozzle auxiliary member, since the cleaning nozzle auxiliary member has a plurality of convex portions on its outer periphery, a gap is formed between it and the inner surface of the pipe. For this reason, it is possible to maintain the drainage performance or suppress a decrease in the drainage performance.

[0011] The cleaning nozzle according to the third aspect includes the cleaning nozzle auxiliary member described in the first aspect or the second aspect.

[0012] In this cleaning nozzle, due to the action of the cleaning nozzle auxiliary member, it is possible to suppress the cleaning nozzle from getting caught in a small-diameter pipe.

Advantages of the Invention

[0013] According to the present invention, it is possible to suppress the cleaning nozzle from getting caught in a small-diameter pipe.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0015] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. Components denoted by the same reference numerals in each drawing mean the same or similar components. In the embodiments described below, redundant descriptions and reference numerals may be omitted. Also, the drawings used in the following description are all schematic, and the dimensional relationships between the respective elements shown in the drawings, the ratios of the respective elements, etc. do not necessarily match the actual ones. Also, the dimensional relationships between the respective elements and the ratios of the respective elements do not necessarily match even between multiple drawings.

[0016] In FIGS. 1 to 4, the cleaning nozzle auxiliary member 10 according to the present embodiment is used for the cleaning nozzle 16. The cleaning nozzle 16 is attached to the tip of the hose 12 and is a member for spraying high-pressure liquid rearward, for example, to clean the inside of the pipe 14. Note that a cleaning nozzle for forward injection (not shown) and the cleaning nozzle 16 for rearward injection may be selectively used depending on the part of the pipe 14. The pipe 14 is, for example, an elbow 20 (FIGS. 6 to 8) used in a siphon drainage system and has a relatively smaller diameter than conventional pipes.

[0017] The cleaning nozzle auxiliary member 10 is, for example, a cylindrical member made of resin, and has, for example, a cylindrical portion 10A and a small-diameter portion 10B, and penetrates in the axial direction. The small-diameter portion 10B is provided on one end side in the axial direction and has a smaller diameter than the inner diameter of the cylindrical portion 10A. The boundary portion between the inner surface of the cylindrical portion 10A and the small-diameter portion 10B is a stepped portion 10C. A plurality of convex portions 10D may be provided on the outer periphery of the cleaning nozzle auxiliary member 10. The convex portion 10D is the maximum diameter portion of the cleaning nozzle auxiliary member 10. The convex portion 10D is, for example, a ridge extending in the axial direction, but may have other shapes.

[0018] In other words, a concave portion may be provided on the outer periphery of the cleaning nozzle auxiliary member 10. The concave portion is the portion between the convex portions 10D, and the bottom of the concave portion corresponds to the outer peripheral surface 10E of the cylindrical portion 10A.

[0019] As shown in FIG. 5, the cleaning nozzle auxiliary member 10 may be cylindrical without convex portions on the outer periphery. In this case, the outer peripheral surface 10E of the cylindrical portion 20A becomes the maximum diameter portion.

[0020] As shown in FIGS. 2 and 3, the cleaning nozzle auxiliary member 10 is provided at the base 18 of the cleaning nozzle 16 to which the hose 12 is connected. The base 18 has a threaded portion 18A at the end opposite to the hose 12 side. The threaded portion 18A side of the base 18 is inserted into the cleaning nozzle auxiliary member 10 from the side of the cylindrical portion 10A. The small-diameter portion 10B of the cleaning nozzle auxiliary member 10 is slightly larger in diameter than the outer diameter of the threaded portion 18A. Therefore, the threaded portion 18A projects to the side opposite to the hose 12 side through the small-diameter portion 10B. At this time, the end face 18B of the root portion of the threaded portion 18A in the base 18 abuts against the stepped portion 10C of the cleaning nozzle auxiliary member 10. Also, the inner surface of the cylindrical portion 10A covers a part of the base 18. The base 18 has an axially penetrating interior. Thereby, a flow path 18C communicating between the hose 12 side and the cleaning nozzle 16 side is formed.

[0021] In the radial direction of the base 18, the outer dimension of the cleaning nozzle auxiliary member 10 (the diameter of the virtual circle connecting the tips of the convex portions 10D in the circumferential direction) is configured to be larger than the outer dimension of the base 18. Thereby, when the cleaning nozzle auxiliary member 10 abuts against the inner surface of the pipe 14, it becomes possible to bring the center of the hose 12 closer to the center of the pipe 14 (FIGS. 6 to 8).

[0022] The nut portion 22 of the cleaning nozzle 16 is attached to the threaded portion 18A. For example, a nozzle body 24 and a hexagonal portion 26 are integrally provided on the nut portion 22. A plurality of nozzle holes (not shown) capable of injecting liquid rearward in the insertion direction of the cleaning nozzle 16 into the pipe 14 are formed in the nozzle body 24. The hexagonal portion 26 is a portion for applying a tool when fastening the nut portion 22 to the threaded portion 18A. A guide portion 30 to which a plurality of disks 28, 29 are connected with a certain degree of freedom from each other is connected to the tip of the hexagonal portion 26. The tip of the disk 29 at the tip is formed in a spherical shape, for example.

[0023] In this way, the cleaning nozzle 16 can be provided with the cleaning nozzle auxiliary member 10. As shown in FIGS. 6 to 8, the cleaning nozzle 16 can also be used for the elbow 20 as the pipe 14, and as shown in FIG. 9, it can also be used for the pipe joint 38 as the pipe 14. In FIG. 9, the main pipe portion 41 is located, for example, between a drain trap (not shown) in plumbing equipment and the elbow 20. The main pipe portion 41 is, for example, a cylindrical straight pipe having a circular cross-section, and substantially the whole is a cylindrical portion 41A. Although not shown, a horizontal draw pipe in a siphon drainage system is connected to the downstream side of the elbow 20. A large-diameter portion 54 is formed at the lower part of the main pipe portion 41, and a male screw portion 54A is formed on the outer periphery of the large-diameter portion 54. By using this male screw portion 54A, the elbow 20 is connected to the lower part of the main pipe portion 41.

[0024] In the pipe joint 38, the main pipe portion 41 and the branch pipe portion 42 communicate with each other at the opening 56. At the tip of the branch pipe portion 42, specifically, at the end opposite to the main pipe portion 41 side, a funnel portion 42A that gradually expands in diameter is provided. The funnel portion 42A is provided on a large-diameter cylindrical mounting portion 62 described later. A pressure relief device 40 is provided at the end of this branch pipe portion 42. The pressure relief device 40 is a component for relieving the pressure acting on the main pipe portion 41. The pressure relief device 40 includes a bag body 50 connected to the pipe joint 38 and a cover 52 covering the bag body 50.

[0025] The bag body 50 is configured to receive the pressure from the main pipe portion 41 from the lower inner side. This bag body 50 is formed of a cylindrical rubber member with one end closed. The bag body 50 may be a member having deformable elasticity. As its material, an elastomer other than resin or rubber can be used.

[0026] The end of the branch pipe portion 42 in the pipe joint 38 is a large-diameter cylindrical mounting portion 62, and the end face corner portion of the mounting portion 62 constitutes a tapered surface 62A that tapers. The bag body 50 and the cover 52 are attached to this mounting portion 62. A male screw portion 62B for mounting is formed on the outer periphery of the mounting portion 62.

[0027] The cover 52 includes a cylindrical cover body 64 and a top surface 64A that closes the upper part of the cover body 64. A large-diameter portion 64B is formed at the lower end of the cover body 64, and a female screw portion 64C for attachment is formed on the inner peripheral surface of the large-diameter portion 64B. By rotating the large-diameter portion 64B of the cover body 64 in alignment with the attachment portion 62 of the pipe joint 38, the female screw portion 64C for attachment on the inner surface of the large-diameter portion 64B is screwed onto the male screw portion 62B of the attachment portion 62, and the cover 52 is configured to be attached to the pipe joint 38. In this attached state, a facing surface 64D that faces the tapered surface 62A of the attachment portion 62 is formed on the inner side surface of the large-diameter portion 64B of the cover 52.

[0028] The top surface 64A is formed in a disc shape. A plurality of arc-shaped ventilation holes 64E centered on the central portion are formed in the top surface 64A. Thus, it is configured to suppress a change in the internal pressure inside the cover 52.

[0029] The bag body 50 is accommodated inside the cover 52. The base end portion of the bag body 50 is clamped between the tapered surface 62A and the facing surface 64D inside the cover 52 and is configured to be in close contact with the tapered surface 62A. Thus, water tightness with the outside is ensured in a state where the inside of the bag body 50 communicates with the pipe joint 38. Further, the bag body 50 is maintained in a self-standing state. The self-standing state means a state where the maximum height of the bag body 50 is maintained at normal pressure.

[0030] (Operation) This embodiment is configured as described above, and its operation will be described below. In FIGS. 6 to 8, the cleaning nozzle auxiliary member 10 is used by being attached to the cleaning nozzle 16. The cleaning nozzle 16 is attached to the tip of the hose 12 and is inserted into the pipe 14 together with the hose 12 from the downstream side of the drainage. By supplying cleaning water from the hose 12 and injecting the cleaning water from the nozzle body 24, the inside of the pipe 14 such as the elbow 20 can be cleaned.

[0031] When the pipe 14 has a small diameter, when pulling out the hose 12 and the cleaning nozzle 16, if the cleaning nozzle 16 reaches a bent portion such as the elbow 20, in the conventional structure, the cleaning nozzle 16 may get caught. This is caused by the hose 12 with a slippery surface contacting the inner surface of the bent portion of the elbow 20, and a part of the cleaning nozzle 16 contacting the inner surface of the elbow 20 at the tip of the bent portion and getting into a locked state. When the hose 12 contacts the inner surface of the elbow 20, it is considered that it is likely to get into a locked state when the angle formed by the line segment connecting these two contact points and the axial direction of the horizontal pipe portion on the hose 12 side exceeds 30°.

[0032] However, in the cleaning nozzle 16 according to the present embodiment, due to the action of the cleaning nozzle auxiliary member 10, the catching of the cleaning nozzle 16 in the small-diameter pipe 14 can be suppressed. Specifically, when the cleaning nozzle auxiliary member 10 abuts against the inner surface of the elbow 20, the center of the hose 12 is brought closer to the center of the pipe 14. Thereby, the contact between the hose 12 and the inner surface of the elbow 20 is suppressed, so that the above-mentioned locked state is suppressed. For this reason, it is suppressed that the cleaning nozzle 16 and the hose 12 contact and get caught on the inner surface of the small-diameter pipe 14.

[0033] When the cleaning nozzle auxiliary member 10 has a plurality of convex portions 10D on the outer periphery, a gap is formed between the inner surface of the pipe 14 and the cleaning nozzle auxiliary member 10, so that the drainage performance can be maintained or the decrease in the drainage performance can be suppressed. In addition, the volume can be reduced while ensuring a large outer dimension in the cleaning nozzle auxiliary member 10, and the material cost can be reduced. As shown in FIG. 5, even if the cleaning nozzle auxiliary member 10 is cylindrical and has no convex portion on the outer periphery, it is possible to suppress the cleaning nozzle 16 and the hose 12 from contacting and getting caught on the inner surface of the small-diameter pipe 14.

[0034] In FIG. 9, the cleaning nozzle auxiliary member 10 also has the effect of suppressing the entry of the cleaning nozzle 16 into the pressure relief device 40. By making the outer dimension of the cleaning nozzle auxiliary member 10 larger than the inner diameter of the branch pipe portion 42 of the pipe joint 36, even if the guide portion 30 enters the branch pipe portion 42 when the cleaning nozzle auxiliary member 10 is inserted into the main pipe portion 41, the cleaning nozzle auxiliary member 10 is caught by the opening 56 of the branch pipe portion 42. Therefore, the cleaning nozzle 16 is prevented from accidentally entering the pressure relief device 40.

[0035] [Other Embodiments] As described above, an example of the embodiment of the present invention has been described. However, the embodiment of the present invention is not limited to the above, and it goes without saying that various modifications can be made without departing from the gist thereof.

Explanation of Reference Numerals

[0036] 10... cleaning nozzle auxiliary member, 10A... cylindrical portion, 10D... convex portion, 12... hose, 14... pipe, 16... cleaning nozzle, 20... elbow (pipe)

Claims

1. A cleaning nozzle auxiliary member used for a cleaning nozzle that is attached to the tip of a hose and cleans the inside of a pipe, which is used by being attached to a base portion to which the hose is connected among the cleaning nozzles, is configured such that an outer dimension is larger than an outer dimension of the base portion in a radial direction of the base portion, and the center of the hose is brought closer to the center of the pipe by contacting an inner surface of the pipe.

2. The cleaning nozzle auxiliary member according to claim 1, having a plurality of convex portions on an outer periphery.

3. A cleaning nozzle including the cleaning nozzle auxiliary member according to claim 1 or claim 2.

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