JP2020089844A - Revolving nozzle - Google Patents

Abstract

To provide a revolving nozzle capable of being revolved by a low pressure pressurized gas.SOLUTION: A revolving nozzle comprises: a cylindrical member 12; a metallic nozzle body 16 on which a cylindrical base cylindrical part 61 having a base end aperture 65 is provided and a jetting port 63 having a tip aperture 66 is provided at a position twisted in relation to the central axis of the base cylindrical part 61; two bearings 13, 14 that are provided on the base cylindrical part 61 to be separated in the central axis direction and support the base cylindrical part 61 to be rotatable in an inner peripheral part of the cylindrical member 12; and an inner nozzle part 11 that is arranged in the cylindrical member 12, with a gap between the inner nozzle part and the base end aperture 65, and jets pressurized gas into the base end aperture 65. In the cylindrical member 12, a cylindrical member aperture 55 that communicates with the outside is provided closer to the inner nozzle part 11 than the bearing 14 closer to the base end aperture 65 out of the two bearings 13, 14.SELECTED DRAWING: Figure 1

Description

The present invention relates to a swirling nozzle.

There is one in which a nozzle made of a flexible pipe material is swung by a force of a fluid passing through the inside of a cylindrical support body (for example, refer to Patent Document 1).

JP, 2016-165671, A

The above-mentioned nozzle has a problem that it does not slew well unless high-pressure fluid is passed through.

Therefore, an object of the present invention is to provide a swirling nozzle that can swirl with a low-pressure pressurized gas.

In order to achieve the above-mentioned object, the present invention provides a tubular member and a cylindrical base tubular portion having a base end opening, and an ejection port having a tip opening is twisted with respect to a central axis of the base tubular portion. A nozzle body made of metal provided at a position, and two bases provided separately from each other in the direction of the central axis on the base tubular portion to rotatably support the base tubular portion on the inner peripheral portion of the tubular member. The tubular member includes: a bearing; and an internal nozzle portion that is disposed in the tubular member with a gap between the proximal end opening portion and ejects a pressurized gas toward the proximal end opening portion. Is characterized in that a tubular member opening communicating with the outside is provided on the inner nozzle portion side of the bearing on the side closer to the base end opening of the two bearings.

According to the present invention, toward the inside of the base end opening of the base cylinder of the metal nozzle body, when the pressurized gas is ejected from the internal nozzle portion arranged with a gap between the base end opening and the base end opening, The pressurized gas that has passed through the inside of the nozzle body is ejected from the tip end opening portion of the ejection port provided at a position twisted with respect to the central axis of the base tubular portion. Then, since the nozzle main body is in a state of being supported by the inner peripheral portion of the tubular member by the two bearings in the base tubular portion, the nozzle body swivels with respect to the tubular member. Since the nozzle body, which is made of metal and thus does not deform, is supported by the bearing, the nozzle body can be swirled by the low-pressure pressurized gas.

In addition, when the pressurized gas is ejected toward the inside of the base end opening of the base cylinder from the internal nozzle portion arranged with a gap between the base end opening portion and the base end opening portion, the base end opening portion and the internal nozzle portion are separated from each other. Negative pressure will be generated between them. Since the tubular member is provided with a tubular member opening communicating with the outside on the inner nozzle portion side of the bearing closer to the base end opening of the two bearings, for example, the tubular member opening Is communicated with the outside air, the outside air can be sucked by the negative pressure, mixed with the pressurized gas, and ejected from the tip opening of the nozzle body. Further, for example, when the opening of the tubular member is communicated with the supply source of the other fluid, the other fluid is sucked by the negative pressure, mixed with the pressurized gas, and ejected from the opening of the tip of the nozzle body. You can

It is a side sectional view showing a swirl nozzle of a 1st embodiment concerning the present invention. It is a side sectional view showing a swirl nozzle of a 2nd embodiment concerning the present invention.

The swirl nozzle according to the first embodiment of the present invention will be described below with reference to FIG.

As shown in FIG. 1, the swirling nozzle 1 of the first embodiment is used by being attached to a pressurized gas supply means X that supplies pressurized gas. In the swirl nozzle 1, the mounting side to the pressurized gas supply means X, that is, the introduction side of the pressurized gas is the base end side, and the opposite side, that is, the ejection side of the pressurized gas is the tip side. The pressurized gas supply means X is connected to the swirl nozzle 1 and a pressurized gas supply source that is a source of pressurized gas, and a gun or the like that switches ON/OFF of the supply of pressurized gas from the pressurized gas supply source. And a supply switching unit of. The pressurized gas supply source is, for example, an air compressor, a blower, or the like, and supplies relatively low-pressure pressurized air as the pressurized gas.

The swirling nozzle 1 includes a hollow inner nozzle portion 11 forming a base end portion thereof, a tubular tubular member 12 having a base end side screwed to an outer peripheral portion of the inner nozzle portion 11, and an inner portion of the tubular member 12. Two bearings 13 and 14 arranged on the circumferential side, a cylindrical intervening member 15 arranged between the bearings 13 and 14 to define an arrangement interval between these, and a tubular member via the two bearings 13 and 14. 12 has a tubular nozzle body 16 supported on the inner peripheral portion thereof.

The internal nozzle portion 11 has a hollow metallic connecting member 21 that forms the base end portion thereof, and a hollow metallic nozzle member 22 that is screwed into the inner peripheral portion of the connecting member 21 on the distal end side. ing.

A male screw 31 is formed on the outer peripheral portion of the coupling member 21 on the base end side, and a male screw 32 is also formed on the outer peripheral portion of the tip end side. The coupling member 21 has a hexagonal column-shaped nut portion 33 formed on the outer peripheral portion between the male screw 31 and the male screw 32, and a female screw 34 formed on the inner peripheral portion on the distal end side. Pressurized gas supply means X for supplying pressurized gas into the connecting member 21 is screwed into the male screw 31 on the base end side.

A male thread 36 is formed on the outer peripheral portion of the nozzle member 22 on the proximal end side, and the distal end side serves as a cylindrical internal ejection port 37. The nozzle member 22 has a hexagonal prism-shaped nut portion 38 formed on the outer peripheral portion between the male screw 36 and the internal ejection port 37. The internal nozzle portion 11 is configured by screwing the nozzle member 22 into the female thread 34 of the connecting member 21 at the male thread 36 on the proximal end side.

The tubular member 12 includes a tubular member body 41 made of a highly rigid synthetic resin material and a metal stopper screw 42. The tubular member main body 41 has a cylindrical tubular portion 45 and a conical tubular portion 46 that extends from the tip of the tubular portion 45 toward the tip side while expanding in diameter. A female screw 47 is formed on the inner peripheral portion of the cylindrical portion 45 on the proximal end side, and a screw hole 48 penetrating in the radial direction is formed near the boundary between the cylindrical portion 45 and the conical cylindrical portion 46. Has been done. An opening 49 is formed on the opposite side of the conical tubular portion 46 from the cylindrical portion 45.

A small-diameter inner diameter portion 51 is formed on the female screw 47 side in an inner peripheral portion between the end portion of the cylindrical portion 45 on the conical cylindrical portion 46 side and the female screw 47, and the small-diameter inner diameter portion 51 is opposite to the female screw 47. A large-diameter inner diameter portion 52 having a diameter larger than that of the small-diameter inner diameter portion 51 is formed. As a result, an abutting portion 53 that extends in the direction orthogonal to the axis of the cylindrical portion 45 is formed between the small diameter inner diameter portion 51 and the large diameter inner diameter portion 52. Between the female thread 47 in the axial direction of the cylindrical portion 45 and the abutting portion 53, a tubular member opening portion 55 having a hole shape that penetrates in the radial direction is formed.

The tubular member main body 41 of the tubular member 12 is screwed into the male screw 47 on the proximal end side with the male screw 32 on the distal end side of the connecting member 21 of the internal nozzle portion 11.

The nozzle body 16 is formed by bending a cylindrical pipe member made of metal such as stainless steel. The nozzle body 16 includes a cylindrical base cylinder portion 61 on the base end side, a cylindrical intermediate cylinder portion 62 on the tip side of the base cylinder portion 61, and a cylindrical ejection port on the tip side of the intermediate cylinder portion 62. And 63. In the nozzle body 16, an end portion of the base tubular portion 61 opposite to the intermediate tubular portion 62 is a base end opening 65, and an end portion of the ejection port 63 opposite to the intermediate tubular portion 62 is a tip end opening. It is part 66. In other words, the base tube portion 61 has the base end opening portion 65, and the ejection port 63 has the tip end opening portion 66.

The center axis of the intermediate cylinder 62 intersects the center axis of the base cylinder 61 at an obtuse angle, and the center axis of the ejection port 63 makes an obtuse angle with respect to the center axis of the intermediate cylinder 62. Crosses The central axis of the ejection port 63 intersects a plane including the central axis of the base cylindrical portion 61 and the central axis of the intermediate cylindrical portion 62. As a result, the central axis of the ejection port 63 is provided at a twisted position with respect to the central axis of the base tubular portion 61. The inner diameter of the base end opening 65 is larger than the outer diameter of the internal ejection port 37 of the nozzle member 22. The inner diameter of the tip opening 66 is larger than the inner diameter of the internal ejection port 37, and is about three times the inner diameter of the internal ejection port 37.

The bearings 13 and 14 are shield type ball bearings and are the same parts. The bearing 13 is press-fitted and fixed to a predetermined position on the tip side of the base tubular portion 61 in the inner race. In this state, the base tubular portion 61 is covered with the intervening member 15 from the base end side, and then the bearing 14 is press-fitted and fixed to the base end portion of the base tubular portion 61 in the inner race until it comes into contact with the interposing member 15. Has been done. As a result, the bearing body 13, 14 and the interposition member 15 are assembled to the predetermined position of the nozzle body 16 to form an integrated body 71. The bearings 13 and 14 are provided on the base tubular portion 61 so as to be separated from each other in the direction of the central axis thereof.

Then, the assembly 71 including the nozzle body 16, the bearings 13 and 14, and the interposition member 15 is inserted into the tubular member 12 from the tip end side thereof, with the base end opening portion 65 at the head. Here, the large-diameter inner diameter portion 52 of the tubular member 12 is larger than the outer diameter of the outer race of the bearings 13 and 14 by the insertion allowance, and the small-diameter inner diameter portion 51 is small in diameter. Therefore, in the assembly 71, the bearings 13 and 14 are inserted into the large-diameter inner diameter portion 52 of the cylindrical portion 45, and the bearing 14 on the proximal end side abuts on the abutting portion 53 on the end surface opposite to the bearing 13. Stop. The minimum distance between the abutment portion 53 and the screw hole 48 is equal to the maximum distance between the bearings 13 and 14, and with the assembly 71 abutting the bearing 14 on the abutment portion 53, the screw hole A stopper screw 42 is screwed into the cylindrical member main body 41 from the outside in the radial direction so that the stopper screw 42 protrudes inward in the radial direction from the large-diameter inner diameter portion 52. The end of the assembly 71 is abutted to prevent the assembly 71 from coming off the tubular member 12.

In the state where the nozzle body 16 is assembled to the tubular member 12, the nozzle body 16 is placed in the tubular member 12, and the nozzle body 16 rotates on the tubular member 12 by the bearings 13 and 14. Supported as possible. The nozzle body 16 is also rotatable with respect to the internal nozzle portion 11 assembled to the tubular member 12.

In the nozzle body 16 and the internal nozzle portion 11 assembled to the tubular member 12, the base end opening portion 65 of the nozzle body 16 and the internal ejection port 37 of the internal nozzle portion 11 are disposed in the tubular member 12 so as to be mutually separated from each other. It is placed with a gap in. Specifically, the internal ejection port 37 of the internal nozzle portion 11 enters the base end opening portion 65 of the nozzle body 16 with a gap in the radial direction. That is, the position of the internal ejection port 37 of the internal nozzle portion 11 overlaps with the nozzle body 16 in the axial direction. The position of the internal ejection port 37 of the internal nozzle portion 11 does not have to overlap with the nozzle body 16 in the axial direction.

The nozzle body 16 assembled to the tubular member 12 extends to the position of the opening 49 of the tubular member 12, and the tip opening 66 thereof is located closer to the base end than the opening 49.

A chamber 81 is formed between the tubular member 12 and the internal nozzle portion 11, the nozzle body 16 and the bearing 14 which are all assembled to the tubular member 12, and the chamber 81 is formed. The gap between the end opening 65 and the internal ejection port 37 of the internal nozzle portion 11 is always in communication with this chamber 81. Further, the tubular member opening 55 of the tubular member 12 is disposed between the connecting member 21 of the internal nozzle portion 11 and the bearing 14, and thus is in constant communication with the chamber 81, and as a result, the nozzle body 16 It constantly communicates with the gap between the base end opening 65 and the internal ejection port 37 of the internal nozzle portion 11. The tubular member opening 55 communicates with the outside air, which is the outside of the swirl nozzle 1, on the side opposite to the chamber 81.

A chamber 82 is formed between the tubular member 12 and the bearings 13 and 14 and the interposition member 15 assembled to the tubular member 12. The bearing 14 is arranged between the chamber 82 and the chamber 81 so as to partition them. The bearing 13 is arranged between the opening portion 49 side of the tubular member 12 and the chamber 82 so as to partition them.

When pressurized air, which is pressurized gas, is supplied from the pressurized gas supply means X to the swirl nozzle 1 having the above-described configuration, it is directed toward the inside of the base end opening portion 65 of the base tubular portion 61 of the metallic nozzle body 16. The pressurized air is jetted from the internal nozzle portion 11 which is arranged with a gap between it and the base end opening portion 65. Then, the pressurized air passes through the inside of the nozzle body 16, and the passed pressurized air is ejected from the tip end opening portion 66 of the ejection port 63 provided at a position twisted with respect to the central axis of the base tubular portion 61. To do. Then, since the nozzle body 16 made of metal is in a state of being supported by the inner peripheral portion of the tubular member 12 by the two bearings 13 and 14 in the base tubular portion 61, it swivels with respect to the tubular member 12. Since the nozzle body 16 which is made of metal and is not deformed is supported on the tubular member 12 by the bearings 13 and 14, the nozzle body 16 is swung by the low-pressure pressurized air to eject the pressurized air from the nozzle body 16. Can be made At this time, since the pressurized air is ejected in the form of a tornado while the nozzle body 16 rotates, the liquid can be blown off or the dust can be blown off even by the low pressured air due to the scraping effect.

Further, when pressurized air is ejected toward the inside of the base end opening 65 of the base tubular portion 61 from the internal nozzle portion 11 arranged with a gap between the base end opening 65 and the base end opening 65, the base end opening 65 is formed. A negative pressure is generated between the internal nozzle portion 11 and the internal nozzle portion 11, and thus the chamber 81 has a negative pressure. The tubular member 12 communicates with the outside of the two bearings 13, 14 closer to the inner nozzle portion 11 than the bearing 14 on the side closer to the proximal end opening 65, and through the chamber 81, the proximal end opening 65. Since the tubular member opening 55 that communicates the gap with the internal nozzle portion 11 to the outside is provided, the tubular member opening 55 is communicated with the outside air, so that the outside air is sucked and pressurized by the negative pressure. It can be ejected from the tip opening 66 of the nozzle body 16 while being mixed with air. Thereby, the turning speed of the nozzle body 16 can be increased. Further, even if the pressure of the pressurized air is low, the pressurized air can be ejected while the nozzle body 16 is swirling well. For example, even when the pressurized gas supply means X is a blower and supplies low-pressure compressed air of about 0.25 to 0.3 MPa to the swirling nozzle 1, the nozzle body 16 is swirled while being satisfactorily applied. The compressed air can be ejected from the tip opening 66.

Since the chamber 81 has a negative pressure, the chamber 82 also has a negative pressure, which makes it difficult for the lubricating oil to leak from the bearing 13 to the opening 49 side of the tubular member 12. Since the chamber 81 communicates with the outside air through the tubular member opening 55, the absolute value of its negative pressure is relatively small. Therefore, the absolute value of the negative pressure in the chamber 82 is also relatively small. Therefore, the differential pressure between the opening 49 side of the bearing 13 and the chamber 82 side is suppressed, and as a result, the outflow of the lubricating oil from the bearing 13 to the chamber 82 side is also suppressed. Further, when the lubricating oil needs to be supplied to the bearing 13, if the lubricating oil is supplied from the opening 49 side, the chamber 82 becomes a negative pressure, and the lubricating oil permeates the bearing 13 well.

For example, as a structure for introducing pressurized air from the pressurized gas supply means X into the chamber 81 via the connecting member 21 without providing the nozzle member 22 and the tubular member opening 55, the pressurized gas supply means X When only the pressurized air is ejected from the nozzle body 16, the chamber 81 has a high positive pressure, and as a result, the chamber 82 also has a high positive pressure. Therefore, the differential pressure between the chamber 82 side and the opening 49 side of the bearing 13 increases, and as a result, the lubricating oil leaks from the bearing 13 to the opening 49 side. The swirl nozzle 1 of the first embodiment can suppress the leakage of the lubricating oil from the bearing 13 toward the opening 49 side.

Further, in the case of a structure in which only the pressurized air from the pressurized gas supply means X is ejected from the nozzle body 16, even if the lubricating oil is supplied to the bearing 13 from the opening 49 side, it is opposite to the opening 49 of the bearing 13. Since the side chamber 82 has a high positive pressure, it is difficult for the lubricating oil to penetrate into the bearing 13. In the swirl nozzle 1 of the first embodiment, such lubrication oil of the bearing 13 can be satisfactorily supplied from the opening 49 side.

The swirl nozzle of the second embodiment according to the present invention will be described below mainly with reference to FIG. 2 focusing on the differences from the first embodiment.

In the second embodiment, in the nozzle body 16 and the internal nozzle portion 11 assembled to the tubular member 12, the internal jet port 37 of the internal nozzle portion 11 is inserted into the base end opening portion 65 of the nozzle body 16. Not in. That is, the position of the internal ejection port 37 of the internal nozzle portion 11 does not overlap with the nozzle body 16 in the axial direction.

Further, in the second embodiment, the female screw 101 is formed in the tubular member opening 55, and the joint 105 is screwed into the female screw 101. The tubular member opening 55 communicates with the fluid supply source Y, which is the outside of the swirl nozzle 1, via the joint 105 on the side opposite to the chamber 81. The fluid supply source Y stores, for example, water, cleaning liquid, particles and the like.

When the fluid supply source Y stores water, pressure is applied toward the inside of the base end opening 65 of the base tubular portion 61 from the internal nozzle portion 11 arranged with a gap between the water and the base end opening 65. When air is jetted, the negative pressure generated between the base end opening 65 and the internal jet outlet 37 sucks water from the fluid supply source Y into the chamber 81 by the ejector principle, and mixes with the pressurized air. It can be ejected from the tip opening 66 of the nozzle body 16. As a result, mist-like water can be ejected from the tip opening 66 of the rotating nozzle body 16.

When the fluid supply source Y stores the cleaning liquid, pressure is applied toward the inside of the base end opening 65 of the base tubular portion 61 from the internal nozzle portion 11 arranged with a gap between the fluid and the base end opening 65. When the air is ejected, the cleaning liquid is sucked from the fluid supply source Y into the chamber 81 by the principle of the ejector by the negative pressure generated between the base end opening 65 and the internal ejection port 37, while mixing with the pressurized air. It can be ejected from the tip opening 66 of the nozzle body 16. As a result, the foamed cleaning liquid can be ejected from the tip opening 66 of the rotating nozzle body 16.

When the fluid supply source stores the particles of dry ice, the fluid is supplied from the internal nozzle portion 11 which is arranged with a gap between the fluid supply source and the base end opening 65 toward the base end opening 65 of the base tubular portion 61. When the pressurized air is ejected, the negative pressure generated between the base end opening 65 and the internal ejection port 37 causes the dry ice particles to be sucked from the fluid supply source Y into the chamber 81 by the ejector principle. It can be jetted from the tip end opening portion 66 of the nozzle body 16 while being mixed with. As a result, dry ice particles can be ejected as shot blast material from the tip opening 66 of the rotating nozzle body 16.

1 Swirling Nozzle 11 Internal Nozzle Part 12 Cylindrical Member 13, 14 Bearing 16 Nozzle Main Body 55 Cylindrical Member Opening 61 Base Cylindrical Part 63 Jet Outlet 65 Base End Opening 66 Tip Opening

Claims (1)

A tubular member,
A nozzle body made of metal, which is provided with a cylindrical base tube portion having a base end opening portion, and has a jet opening having a tip end opening portion at a position twisted with respect to a central axis of the base tube portion,
Two bearings that are provided in the base tubular portion at a distance in the direction of the central axis to rotatably support the base tubular portion on the inner peripheral portion of the tubular member,
An inner nozzle portion disposed in the tubular member with a gap between the base end opening portion and the base end opening portion to eject a pressurized gas toward the base end opening portion;
In the tubular member, a tubular member opening communicating with the outside is provided on the inner nozzle portion side of a bearing closer to the base end opening of the two bearings. A swirling nozzle.

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