GB2121321A - Improvements relating to the spraying of liquids - Google Patents
Improvements relating to the spraying of liquids Download PDFInfo
- Publication number
- GB2121321A GB2121321A GB08314899A GB8314899A GB2121321A GB 2121321 A GB2121321 A GB 2121321A GB 08314899 A GB08314899 A GB 08314899A GB 8314899 A GB8314899 A GB 8314899A GB 2121321 A GB2121321 A GB 2121321A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stem
- spraying device
- anvil
- liquid spraying
- liquid
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
- B05B1/262—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors
- B05B1/265—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors the liquid or other fluent material being symmetrically deflected about the axis of the nozzle
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- Catching Or Destruction (AREA)
Abstract
A liquid spraying device (1) includes a shell (2) which contains liquid to be sprayed, which is supplied through an inlet port (3). Connected to the inside of the shell is a cylindrical ring (5), and a stem (6) is arranged concentrically within the ring to leave a small annular gap (7) between the ring and the stem. An anvil (9) is provided at the top of the stem, and the stem is provided with a groove (10). <IMAGE>
Description
SPECIFICATION
Improvements relating to the spraying of liquids
This invention is related to improvements in liquid spraying.
There are a number of devices available for the spraying of liquids. Such devices have a wide range of uses particularly spraying water or aqueous solutions in horticultural applications.
A class of these devices involve directing a jet of liquid, usually water, at a surface which deflects the jet radially from its original direction. As the jet leaves the surface the liquid begins to form a spray. The distance travelled by the spray in general terms its a function of both velocity of the jet and the characteristics of the spraying device.
In prior spraying devices the rate at which water is precipitated on a surface surrounding the device varies with the radial distance from the spraying device. However there are many applications where it is necessary or desirable to precipitate water relatively evenly over an area defined by the range of the spraying device.
According to the invention there is provided a liquid spraying device comprising an annular spray jet defined by an outer cylindrical part and a stem arranged concentrically with the outer cylindrical part, said stem extending beyond the jet and towards an anvil, a peripheral groove being provided in the stem between the anvil and the spray jet.
in one embodiment the anvil may be substantially cone shaped, and in another embodiment the anvil may be substantially "T" shaped.
It is convenient that the stem is "press-fitted" into a fixture within the spraying device. It is also convenient for the stem and the anvil to be integral with one another.
The spraying device is suitably a plastics material or a filled plastics material. If desired, the anvil may be made from a metal such as brass.
In the embodiment in which the anvil is substantially cone shaped the angle between the longitudinal axis of the stem and the coned sides of the anvil is preferably in the range 25c35o.
More preferably this angle is in the range of 280--320 and most preferably the angle is 300.
The spraying device of the present invention has important advantages over the prior art. In particular the device is simple and economical to manufacture, and in addition provides a substantially constant liquid precipitation rate at most distances within its range. This effect is largely due to the provision of the groove on the stem. The velocity of the layer of water as it leaves the annular space is minimum at the inside and outside surfaces of the water and maximum near the centre. It is believed that the groove allows a distribution of the velocity gradient in such a way that there is substantially no velocity gradient where the liquid encounters the anvil. Thereafter friction causes a uniform velocity gradient across the section of the jet of water, thereby faciiitating uniform radial distribution of liquid.
Reference is now made to the accompanying drawings in which:
Figure 1 is a cross sectional view through one embodiment of a spraying device according to the invention;
Figure 2 is a section along the line 2-2 of
Figure 1;
Figure 3 is a cross-section of a further embodiment of a spraying device according to the invention;
Figure 4 is a graph of precipitation rate versus distance for a conventional spraying device; and
Figure 5 is a graph of precipitation rate versus distance for a device according to the invention.
Referring to Figures 1 and 2, a spraying device generally designated 1 is shown. A shell 2 contains the liquid to be sprayed which is supplied through port 3. The shell 2 has a liquid containing cavity 4, and connected to the inside of the shell 2 is a cylindrical ring 5. The cylindrical ring 5 may alternatively form a part of the shell 2. A stem 6 is arranged concentrically with the ring 5. This leaves a small annular gap 7 between the ring 5 and the stem 6.
The stem 6 may be held in position by "pressfitting" into a fixture 8. An anvil 9 is connected to the top of the stem 6. Between the anvil 9 and the ring 5, there is a groove 10 provided on the stem 6.
Figure 3 shows an alternative embodiment of a spraying device according to the invention. The spraying device illustrated in Figure 3 is similar to that shown in Figures 1 and 2 and like reference numerals refer to like parts. The only difference is that the anvil 9a is "T" shaped rather than cone shaped.
In use, a liquid is pumped into the device through port 3. Where the liquid is water the device may be supplied by the water mains or may be pumped. The liquid passes into cavity 4 from where it passes through gap 7.
After passing over the groove 10 the liquid is deflected by the anvil 9 or 9a. The liquid leaves the anvil 9 or 9a at an angle to the stem and breaks up
into a spray.
The following two examples compare the
spraying device of the present invention with a
prior spraying device.
EXAMPLE 1
The spraying device used was as shown in
Figures 1 and 2 with the exception that no groove 10 was present in the stem. The radius of the stem was 0.4 mm and the inner diameter of the cylindrical ring was 0.5 mm. The anvil diameter was 1.25 cm and the angle between the stem and the coned sides of the anvil was 300. The liquid used was water and was supplied from the water mains.
The results obtained are shown in Figure 4.
Close to the spraying device the precipitation rate
is high and irregular. After about 1.5 m the rate
falls rapidly.
EXAMPLE 2
The spraying device used was as shown in
Figures 1 and 2. The groove was included. The dimensions of the spraying device were as in
Example 1. The groove was cut out of the stem to a depth of 0.2 mm. The liquid used was water and was supplied from the water mains.
The results obtained are shown in Figure 5. The precipitation rate is substantially constant over a long distance. Even after 3 m the rate has not fallen by a large amount. The amount of water delivered at each radial distance is generally less than that delivered using the device described in
Example 1. However the range of this spraying device is greater than the device of Example 1.
Moreover, the characteristics of this spraying device can be changed in accordance with the invention to provide a higher precipitation rate if this is required.
Claims (9)
1. A liquid spraying device comprising an annular spray jet defined by an outer cylindrical part and a stem arranged concentrically with the outer cylindrical part, said stem extending beyond the jet and towards an anvil, a peripheral groove being provided in the stem between the anvil and the spray jet.
2. A liquid spraying device according to Claim 1 in which the anvil is substantially cone shaped.
3. A liquid spraying device according to Claim 2 in which the angle between the longitudinal axis of the stem and the coned sides of the anvil is in the range of 250 to 350.
4. A liquid spraying device according to Claim 2 in which the angle between the longitudinal axis of the stem and the coned sides of the anvil is in the range of 280 to 320.
5. A liquid spraying device according to Claim 2 in which the angle between the longitudinal axis of the stem and the coned sides of the anvil is 300.
6. A liquid spraying device according to Claim 1 in which the anvil is substantially "T" shaped.
7. A liquid spraying device according to any preceding claim in which the anvil and the stem are integrally formed.
8. A liquid spraying device according to any preceding claim which is provided a fixture into which the stem is "press-fitted".
9. A liquid spraying device substantially as herein described with reference to and as shown in the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08314899A GB2121321A (en) | 1982-06-01 | 1983-05-31 | Improvements relating to the spraying of liquids |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8215843 | 1982-06-01 | ||
| GB08314899A GB2121321A (en) | 1982-06-01 | 1983-05-31 | Improvements relating to the spraying of liquids |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8314899D0 GB8314899D0 (en) | 1983-07-06 |
| GB2121321A true GB2121321A (en) | 1983-12-21 |
Family
ID=26282993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08314899A Withdrawn GB2121321A (en) | 1982-06-01 | 1983-05-31 | Improvements relating to the spraying of liquids |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2121321A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB415594A (en) * | 1932-09-12 | 1934-08-30 | Erik Gustaf Peter Runbaeck | Method of protecting lumber exposed to the atmosphere from damage due to storage |
| GB703642A (en) * | 1951-04-27 | 1954-02-10 | Peter Charles Andrews | Improvements relating to devices for atomising liquids |
| US3517886A (en) * | 1968-03-26 | 1970-06-30 | Gerhard J Dyck | Lawn sprinkler nozzles |
| GB1366570A (en) * | 1972-11-01 | 1974-09-11 | Koyo Fastener Co Ltd | Sprinkler nozzle |
| GB1481520A (en) * | 1974-11-18 | 1977-08-03 | Grundy Ltd | Liquid sprayer for cleansing and/or sterilising tanks |
| GB1511028A (en) * | 1974-10-23 | 1978-05-17 | Rosenberg P | Spraying device |
-
1983
- 1983-05-31 GB GB08314899A patent/GB2121321A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB415594A (en) * | 1932-09-12 | 1934-08-30 | Erik Gustaf Peter Runbaeck | Method of protecting lumber exposed to the atmosphere from damage due to storage |
| GB703642A (en) * | 1951-04-27 | 1954-02-10 | Peter Charles Andrews | Improvements relating to devices for atomising liquids |
| US3517886A (en) * | 1968-03-26 | 1970-06-30 | Gerhard J Dyck | Lawn sprinkler nozzles |
| GB1366570A (en) * | 1972-11-01 | 1974-09-11 | Koyo Fastener Co Ltd | Sprinkler nozzle |
| GB1511028A (en) * | 1974-10-23 | 1978-05-17 | Rosenberg P | Spraying device |
| GB1481520A (en) * | 1974-11-18 | 1977-08-03 | Grundy Ltd | Liquid sprayer for cleansing and/or sterilising tanks |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8314899D0 (en) | 1983-07-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |