CA2616403A1 - Particulate media blasting nozzle silencer - Google Patents
Particulate media blasting nozzle silencer Download PDFInfo
- Publication number
- CA2616403A1 CA2616403A1 CA 2616403 CA2616403A CA2616403A1 CA 2616403 A1 CA2616403 A1 CA 2616403A1 CA 2616403 CA2616403 CA 2616403 CA 2616403 A CA2616403 A CA 2616403A CA 2616403 A1 CA2616403 A1 CA 2616403A1
- Authority
- CA
- Canada
- Prior art keywords
- nozzle
- silencer
- tubing
- particulate media
- media blasting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Exhaust Silencers (AREA)
Abstract
A particulate media blasting nozzle silencer comprises a length of sound deadening rubber/ elastomeric-based material tubing releasably securable to the outlet region of the nozzle. The internal wall of the tubing may be coated with or provided with an insert of a wear-resistant material to extend the life of the tubing.
Description
PARTICULATE MEDIA BLASTING NOZZLE SILENCER
FIELD OF THE INVENTION
The present invention relates to a particulate media blasting nozzle silencer for reducing the level noise generated during usage of particulate media blasting equipment.
BACKGROUND OF THE INVENTION
Sandblasting or the like abrasive particulate material is a conventional and effective process used in all manner of industries for surface treatment, particularly cleaning. However, the process suffers from the disadvantage of being noisy in use to the extent that without appropriate protective wear, operatives' health, especially hearing, may be adversely affected.
Accordingly, there is a need for a particulate media blasting nozzle silencer.
SUMMARY OF THE INVENTION
It is therefore a general object of the present invention to provide a particulate media blasting nozzle silencer.
An advantage of the present invention is that the silencer design is versatile in the sense of it being applicable to any nozzle of complementary external diametral dimension.
Another advantage of the present invention is that the silencer, or a part thereof, is easily replaceable and is of simple and low cost construction.
A further advantage of the present invention is that the attachment of the silencer to the nozzle is simple and easy to unlock.
FIELD OF THE INVENTION
The present invention relates to a particulate media blasting nozzle silencer for reducing the level noise generated during usage of particulate media blasting equipment.
BACKGROUND OF THE INVENTION
Sandblasting or the like abrasive particulate material is a conventional and effective process used in all manner of industries for surface treatment, particularly cleaning. However, the process suffers from the disadvantage of being noisy in use to the extent that without appropriate protective wear, operatives' health, especially hearing, may be adversely affected.
Accordingly, there is a need for a particulate media blasting nozzle silencer.
SUMMARY OF THE INVENTION
It is therefore a general object of the present invention to provide a particulate media blasting nozzle silencer.
An advantage of the present invention is that the silencer design is versatile in the sense of it being applicable to any nozzle of complementary external diametral dimension.
Another advantage of the present invention is that the silencer, or a part thereof, is easily replaceable and is of simple and low cost construction.
A further advantage of the present invention is that the attachment of the silencer to the nozzle is simple and easy to unlock.
According to the present invention, there is provided a particulate media blasting nozzle silencer comprising a length of tubing adapted for securement at one end thereof to the outlet region of a nozzle.
The tubing may be produced from rubber-based material or a substitute therefor and may also be reinforced, for example metal/ fiber-reinforced rubber (or other elastomeric material) based material such as is used in the construction of tyres. The tubing may per se be rigid or, in the case of rubber, with some flexibility, the tubing may be provided with a rigid casing fitting over its exterior surface to afford the requisite support.
In the alternative, the tubing may be produced from a wear-resistant material such as tungsten carbide. As a further alternative, the internal wall of the tubing may be coated with a wear-resistant material such as PTFE
(polytetrafluoroethylene) materials (as Teflon ) or melamine or the like.
As a still further alternative, the tubing may be produced from a plastics material, preferably rigid.
The tubing may advantageously be affixed to the outlet region of the nozzle by means of a hose clamp or the like which can be tightened and loosened with ease. In the alternative, a simple screw clamping arrangement may be adopted for affixing the tubing to the outlet region of the nozzle.
Advantageously, the present silencer for particulate media blasting nozzle is reversible, in order to allow wearing of both ends thereof.
Other objects and advantages of the present invention will become apparent from a careful reading of the detailed description provided herein, with appropriate reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Further aspects and advantages of the present invention will become better understood with reference to the description in association with the following Figures, in which similar references used in different Figures denote similar components, wherein:
Figure 1 is a sketch of an operative using a particulate media blasting nozzle with a silencer according to an embodiment of the present invention;
Figure 2 is an external view of a particulate media blasting nozzle with the silencer mounted thereon;
Figure 2a is a view similar to Figure 2 showing another embodiment of a particulate media blasting nozzle silencer according to the present invention;
Figure 3 is an exploded view of a particulate media blasting nozzle and the silencer of Figure 2; and Figure 4 is a cross sectional view of the silencer of Figure 2 in combination with a particulate media blasting nozzle in use.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
With reference to the annexed drawings the preferred embodiment of the present invention will be herein described for indicative purpose and by no means as of limitation.
Referring to Figure 1 an operative 1 is shown dressed in appropriate protective work wear 2 and holding a particulate media blasting nozzle, such as a sandblasting nozzle 4 with silencer 6 supplied by a hose 8, which in use typically carries an air-sand mixture to the nozzle 4, although any other particulate or abrasive material and/or mixture could be considered without departing from the scope of the present invention.
Referring to Figures 2 to 4, the nozzle 4 is of conventional form with a screw fitment 10 at its entry end 11 for insertion in a twist-lock hose connector 12. The nozzle 4 is of generally hollow cylindrical form and is stepped as at 13 to have a smaller diameter at the outlet region 15 than the inlet region 16.
The silencer 6 comprises a length of rubber-based, or any other elastomeric material-based, sound deadening tubing 20 having an internal diameter substantially matching the external root diameter of the inlet region 16 of the nozzle 4. It may be advantageous for the tubing 20 to be an interference fit over the nozzle 4 in order to ensure effective sealing as between the two components.
As shown in Figure 2a, a fixing or attachment means 22 is conveniently provided; for example, the fixing means may be in the form of a hose clamp or the like, namely an adjustable and releasable steel band or secured with a screw, to provide some clamping pressure on the flexible tubing material, if applicable. Alternatively, the fixing means may be a physical locking means (not shown) such merely screws engaging the nozzle 4 through the wall of the tubing 20.
The length of the tubing is selected according to the specific requirements, such as the required working sound spectrum and wavelengths to be attenuated, dampened or deadened, and may for example be in the region of about 1.5 feet, in order to protrude away from the nozzle end by about between six to ten inches (6-10 in), depending on the case.
In the case where rubber-based tubing or other essentially flexible elastomeric type material is used for the silencer 6, a rigid tubular casing 30 is provided to encase the tubing 20 in sleeve-like manner as seen in Figures 2 to 4, and a shortened casing being shown in Figure 2a.
Referring particularly to Figure 4 the nozzle 4 with its mounted silencer 6 is shown in use with a fluid-borne particulate mixture 40 travelling through the silencer tubing 20. In the absence of the silencer 6 the noise level of the nozzle can reach about 110 dB, but with the addition of the silencer 6 a reduction to about 70 dB can readily be achieved.
In order to improve the sound deadening properties of the tubing 20 to specific sound frequency range, the inner wall surface 21 of the outlet region of the tubing could be textured or be circularly or spirally ribbed (not shown), or could also have its outlet opening be flaring outwardly, such as being rounded, chamfered or the like (not shown). Similarly, the cavity 24 defined by the space between the small diameter outlet region 15 of the nozzle 4 and the tubing inner wall 21 can be used as a resonance chamber, which can be calibrated in length dimension (axial direction) by having a locally inner rib 23 inwardly protruding from the tubing inner wall 21 adjacent the step 13, as shown in dotted lines in 5 Figure 4.
It will be appreciated that some particles 42 of the sand or other abrasive material will separate from the main stream and impact upon the internal wall of the tubing 20 causing abrasive wear. Dependent upon the degree of nozzle usage, the silencer 6 will require replacement since its noise suppression capability is impaired as a result of the wear. Replacement is simple and low cost. The fixing means is merely loosened and the tubing with its protective casing is removed from the nozzle. A new tubing 20 is sheathed over the nozzle 4 and fixed thereto whereby the nozzle is again ready for use in its silenced mode. Depending on the wearing level of the used silencer 6, the latter could simply be reversed to wear the other side, as long as the worn side permits attachment to the nozzle 4, with or without the fixing means, in order to increase the life of the silencer 6.
In order to reduce the frequency of tubing replacement, the internal wall of the tubing 20 may have a wear-resistant coating such as PTFE
(polytetrafluoroethylene) materials (as that sold under the trade mark Teflon@) or it may be melamine, or indeed any other similar coating suitable for the purpose.
To improve wear resistance of the tubing 20, metallic or the like band or ring inserts 26, as shown in dotted lines in Figure 4, could be located on the inner wall 21. Such inserts 26 or the like are spaced from each other with either regular or irregular intervals. Also, a spiral type insert (not shown), such as a coil spring or the like, could be installed adjacent the inner wall 21 to reduce wearing thereof.
Accordingly, from the above, it is shown that the silencer 6 of the present invention is easily adjusted for customization to the specific needs of any application.
The tubing may be produced from rubber-based material or a substitute therefor and may also be reinforced, for example metal/ fiber-reinforced rubber (or other elastomeric material) based material such as is used in the construction of tyres. The tubing may per se be rigid or, in the case of rubber, with some flexibility, the tubing may be provided with a rigid casing fitting over its exterior surface to afford the requisite support.
In the alternative, the tubing may be produced from a wear-resistant material such as tungsten carbide. As a further alternative, the internal wall of the tubing may be coated with a wear-resistant material such as PTFE
(polytetrafluoroethylene) materials (as Teflon ) or melamine or the like.
As a still further alternative, the tubing may be produced from a plastics material, preferably rigid.
The tubing may advantageously be affixed to the outlet region of the nozzle by means of a hose clamp or the like which can be tightened and loosened with ease. In the alternative, a simple screw clamping arrangement may be adopted for affixing the tubing to the outlet region of the nozzle.
Advantageously, the present silencer for particulate media blasting nozzle is reversible, in order to allow wearing of both ends thereof.
Other objects and advantages of the present invention will become apparent from a careful reading of the detailed description provided herein, with appropriate reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Further aspects and advantages of the present invention will become better understood with reference to the description in association with the following Figures, in which similar references used in different Figures denote similar components, wherein:
Figure 1 is a sketch of an operative using a particulate media blasting nozzle with a silencer according to an embodiment of the present invention;
Figure 2 is an external view of a particulate media blasting nozzle with the silencer mounted thereon;
Figure 2a is a view similar to Figure 2 showing another embodiment of a particulate media blasting nozzle silencer according to the present invention;
Figure 3 is an exploded view of a particulate media blasting nozzle and the silencer of Figure 2; and Figure 4 is a cross sectional view of the silencer of Figure 2 in combination with a particulate media blasting nozzle in use.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
With reference to the annexed drawings the preferred embodiment of the present invention will be herein described for indicative purpose and by no means as of limitation.
Referring to Figure 1 an operative 1 is shown dressed in appropriate protective work wear 2 and holding a particulate media blasting nozzle, such as a sandblasting nozzle 4 with silencer 6 supplied by a hose 8, which in use typically carries an air-sand mixture to the nozzle 4, although any other particulate or abrasive material and/or mixture could be considered without departing from the scope of the present invention.
Referring to Figures 2 to 4, the nozzle 4 is of conventional form with a screw fitment 10 at its entry end 11 for insertion in a twist-lock hose connector 12. The nozzle 4 is of generally hollow cylindrical form and is stepped as at 13 to have a smaller diameter at the outlet region 15 than the inlet region 16.
The silencer 6 comprises a length of rubber-based, or any other elastomeric material-based, sound deadening tubing 20 having an internal diameter substantially matching the external root diameter of the inlet region 16 of the nozzle 4. It may be advantageous for the tubing 20 to be an interference fit over the nozzle 4 in order to ensure effective sealing as between the two components.
As shown in Figure 2a, a fixing or attachment means 22 is conveniently provided; for example, the fixing means may be in the form of a hose clamp or the like, namely an adjustable and releasable steel band or secured with a screw, to provide some clamping pressure on the flexible tubing material, if applicable. Alternatively, the fixing means may be a physical locking means (not shown) such merely screws engaging the nozzle 4 through the wall of the tubing 20.
The length of the tubing is selected according to the specific requirements, such as the required working sound spectrum and wavelengths to be attenuated, dampened or deadened, and may for example be in the region of about 1.5 feet, in order to protrude away from the nozzle end by about between six to ten inches (6-10 in), depending on the case.
In the case where rubber-based tubing or other essentially flexible elastomeric type material is used for the silencer 6, a rigid tubular casing 30 is provided to encase the tubing 20 in sleeve-like manner as seen in Figures 2 to 4, and a shortened casing being shown in Figure 2a.
Referring particularly to Figure 4 the nozzle 4 with its mounted silencer 6 is shown in use with a fluid-borne particulate mixture 40 travelling through the silencer tubing 20. In the absence of the silencer 6 the noise level of the nozzle can reach about 110 dB, but with the addition of the silencer 6 a reduction to about 70 dB can readily be achieved.
In order to improve the sound deadening properties of the tubing 20 to specific sound frequency range, the inner wall surface 21 of the outlet region of the tubing could be textured or be circularly or spirally ribbed (not shown), or could also have its outlet opening be flaring outwardly, such as being rounded, chamfered or the like (not shown). Similarly, the cavity 24 defined by the space between the small diameter outlet region 15 of the nozzle 4 and the tubing inner wall 21 can be used as a resonance chamber, which can be calibrated in length dimension (axial direction) by having a locally inner rib 23 inwardly protruding from the tubing inner wall 21 adjacent the step 13, as shown in dotted lines in 5 Figure 4.
It will be appreciated that some particles 42 of the sand or other abrasive material will separate from the main stream and impact upon the internal wall of the tubing 20 causing abrasive wear. Dependent upon the degree of nozzle usage, the silencer 6 will require replacement since its noise suppression capability is impaired as a result of the wear. Replacement is simple and low cost. The fixing means is merely loosened and the tubing with its protective casing is removed from the nozzle. A new tubing 20 is sheathed over the nozzle 4 and fixed thereto whereby the nozzle is again ready for use in its silenced mode. Depending on the wearing level of the used silencer 6, the latter could simply be reversed to wear the other side, as long as the worn side permits attachment to the nozzle 4, with or without the fixing means, in order to increase the life of the silencer 6.
In order to reduce the frequency of tubing replacement, the internal wall of the tubing 20 may have a wear-resistant coating such as PTFE
(polytetrafluoroethylene) materials (as that sold under the trade mark Teflon@) or it may be melamine, or indeed any other similar coating suitable for the purpose.
To improve wear resistance of the tubing 20, metallic or the like band or ring inserts 26, as shown in dotted lines in Figure 4, could be located on the inner wall 21. Such inserts 26 or the like are spaced from each other with either regular or irregular intervals. Also, a spiral type insert (not shown), such as a coil spring or the like, could be installed adjacent the inner wall 21 to reduce wearing thereof.
Accordingly, from the above, it is shown that the silencer 6 of the present invention is easily adjusted for customization to the specific needs of any application.
Although the present invention has been described with a certain degree of particularity, it is to be understood that the disclosure has been made by way of example only and that the present invention is not limited to the features of the embodiments described and illustrated herein, but includes all variations and modifications within the scope and spirit of the invention as hereinafter claimed.
Claims (14)
1. A particulate media blasting nozzle silencer comprising a length of sound deadening tubing adapted for securement at one end thereof to the outlet region of a nozzle.
2. The nozzle silencer of Claim 1 wherein the tubing is flexible.
3. The nozzle silencer of Claim 2 wherein the tubing is provided with a rigid external casing.
4. The nozzle silencer of Claim 1 wherein the tubing is produced from rubber/ elastomeric-based material.
5. The nozzle silencer of Claim 4 wherein the tubing is produced from metal/ fiber-reinforced rubber/ elastomeric-based material.
6. The nozzle silencer of Claim 1 wherein the tubing is rigid.
7. The nozzle silencer of Claim 1 wherein the tubing has an internal wall provided with a wear-resistant coating/ insert.
8 8. The nozzle silencer of Claim 7 wherein the insert is a plurality of wear resistant rings located adjacent the inner wall and spaced from each other.
9. The nozzle silencer of Claim 1 wherein the tubing adapted for securement at either end thereof to the outlet region of a nozzle.
10. The nozzle silencer of Claim 1 wherein a fixing means is provided in use for securing the silencer to the nozzle.
11. The nozzle silencer of Claim 10 wherein the fixing means is a releasable clamp.
12. The nozzle silencer of Claim 1 wherein an inner wall of the tubing is textured/ ribbed.
13. The nozzle silencer of Claim 1 wherein an inner wall of the tubing adjacent an outlet end thereof flaring outwardly.
14. The nozzle silencer of Claim 1 wherein the silencer is adjustable for customization thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2616403 CA2616403A1 (en) | 2007-12-24 | 2007-12-24 | Particulate media blasting nozzle silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2616403 CA2616403A1 (en) | 2007-12-24 | 2007-12-24 | Particulate media blasting nozzle silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2616403A1 true CA2616403A1 (en) | 2009-06-24 |
Family
ID=40848309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2616403 Abandoned CA2616403A1 (en) | 2007-12-24 | 2007-12-24 | Particulate media blasting nozzle silencer |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2616403A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107650029A (en) * | 2016-07-25 | 2018-02-02 | 中国科学院宁波材料技术与工程研究所 | Jet process equipment and its denoising device |
| WO2022115910A1 (en) * | 2020-12-02 | 2022-06-09 | Blastone Technology Pty Ltd | A silencer for a blast nozzle |
| US11660725B2 (en) * | 2019-07-01 | 2023-05-30 | Gary C. HAVERDA | Abrasive blasting nozzle noise reduction shroud and safety system |
-
2007
- 2007-12-24 CA CA 2616403 patent/CA2616403A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107650029A (en) * | 2016-07-25 | 2018-02-02 | 中国科学院宁波材料技术与工程研究所 | Jet process equipment and its denoising device |
| US11660725B2 (en) * | 2019-07-01 | 2023-05-30 | Gary C. HAVERDA | Abrasive blasting nozzle noise reduction shroud and safety system |
| WO2022115910A1 (en) * | 2020-12-02 | 2022-06-09 | Blastone Technology Pty Ltd | A silencer for a blast nozzle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |