EP1600216A2 - Spray gun - Google Patents
Spray gun Download PDFInfo
- Publication number
- EP1600216A2 EP1600216A2 EP05010568A EP05010568A EP1600216A2 EP 1600216 A2 EP1600216 A2 EP 1600216A2 EP 05010568 A EP05010568 A EP 05010568A EP 05010568 A EP05010568 A EP 05010568A EP 1600216 A2 EP1600216 A2 EP 1600216A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- spray gun
- flow rate
- casing
- needle
- piston
- 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- Withdrawn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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
- B05B7/1254—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated
- B05B7/1263—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated
- B05B7/1272—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated actuated by gas involved in spraying, i.e. exiting the nozzle, e.g. as a spraying or jet shaping gas
- B05B7/1281—Serial arrangement, i.e. a single gas stream acting on the controlling means first and flowing downstream thereof to the nozzle
-
- 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
- B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
-
- 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
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
- B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
- B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
- B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
- B05B1/306—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice the actuating means being a fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/085—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to flow or pressure of liquid or other fluent material to be discharged
- B05B12/087—Flow or presssure regulators, i.e. non-electric unitary devices comprising a sensing element, e.g. a piston or a membrane, and a controlling element, e.g. a valve
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
- B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
- B05B7/0823—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter comprising a rotatable spray pattern adjusting plate controlling the flow rate of the spray shaping gas jets
Definitions
- spray guns (such as, for example, those mounted on spraying machines in tanneries) operate on the principle of regulating the supply of liquid using a single needle that opens and closes the substance outlet nozzle.
- a second disadvantage apparent in these spray guns arises from the fact that alterations to the needle position cause variations in the opening and closing times for the product outlet profile, which necessitates altering the work parameters of the machine, to adapt them to the period of time required for the needle to complete a full cycle.
- the objective of the present finding is to create a spray gun or airbrush that does not have the disadvantages apparent in similar known products of this type.
- This objective is achieved with a spray gun characterized in that the device for regulating the flow rate of the liquid substance to be sprayed is independent of the device that activates the operation of the needle for regulating the opening and closing of the substance outlet nozzle.
- this objective is achieved with a spray gun in which the micrometric regulation of the liquid flow rate is independent of the needle and outlet nozzle sizes.
- the objective is also achieved with a spray gun in which the regulation of the liquid flow rate is independent of the needle movement for opening and closing the nozzle.
- this objective is achieved with a spray gun characterized in that it has a liquid flow rate regulator located externally on the instrument; or more specifically, fixed on the liquid inlet opening and connected to the liquid supply tube itself.
- the flow rate regulator comprises a fixed hollow casing, made as a fixed or integral part of the instrument casing, within which runs a piston-pin that determines the profile of the fluid flow.
- the axial motion of the piston-pin for the purpose of opening and closing the fluid regulator, as well as its stop limit position for regulating the flow rate of liquid entering the gun, are determined manually or by means of electro-pneumatic servomechanisms.
- the spray gun marked in its entirety as item [1], comprises a casing [2], within which runs a needle [3], which engages with the nozzle outlet profile [4], to which is fixed an atomizer [5] held in place with a retaining ring [6].
- Openings "H” an "K” are formed in the casing [2], providing for the intake respectively of nebulising air, conveyed via a duct [7] to the nozzle [4] and of pressurised air which, when working, is used both to elevate the piston [8] so as to open inlet "H” and to raise the needle [3] so as to open the nozzle [4].
- opening "H” is closed by the piston [8], which is lowered by the thrust action of the spring [9].
- the first innovative feature of the invention provides for the flow rate of the liquid to be sprayed to be determined by means of a flow rate regulator, marked in its entirety as item [20], located externally on the casing [2] and communicating with the nozzle [4] via channel [13] formed in the above casing and connected externally to the liquid inlet tube "L".
- the flow rate regulator [20] comprises a casing [21] equipped with a piston-pin [22] capable of running axially between the opening and closing positions of the channel [13] and vice versa.
- the liquid flow rate from the tube "L" to the channel [13] is determined, at the operating stage, by the position of the piston-pin [22], which stops against the spindle [26] screwed onto the hub [25].
- part of the hub [25] is provided with longitudinal ribbing [28] and a click-pin [29], fixed to the sleeve, which engages with this ribbing.
- each rib triggers the click-pin, this being observed by the operator or read from appropriate markings incised on the external surface of the sleeve [27]; the operator is therefore able to appreciate the extent of the sleeve's angular rotation and hence the movement of the piston-pin [22] or rather, the extent to which the liquid flow tube is open or blocked.
- the second innovative feature of the finding concerns the facility, on each spray gun, to regulate the flow rate of nebulising air that is input through opening "H” and goes on to create the spray cone of the atomizer [5].
- the angular rotation of the ring [16], for regulating the overlap of the two through holes [14 / 17], is achieved by means of a threaded connection consisting of a grub screw [18] which is screwed into the casing and engages with a threaded section formed in the ring [16].
- the instrument In order that the instrument can be adapted to the properties of the liquid to be sprayed, the invention features further improvements in construction, such as:
- the invention allows for a single flow rate regulator [20] to supply two or more spray guns [1.1, 1.2 & 1.3] simultaneously and regulate their liquid substance flow rate.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Nozzles (AREA)
Abstract
Description
- fig. 1 (Plate I) shows a front elevation and sectional view of the spray gun referred to in this invention, in operational mode or "open";
- fig. 2 (Plate II) shows a front elevation and sectional view of the spray gun referred to in fig. 1 in rest mode or "closed".
- fig. 3 shows three different possible arrangements for the nozzle outlets;
- fig. 4 (Plate III) shows a detail of the nozzle area;
- fig. 5 shows a cross sectional view of the gun, taken on line V - V of fig. 4;
- figs. 6 & 7 (Plate IV) show an elevation and sectional view of a first embodiment of the gun's flow rate regulator as referred to in fig. 1, in open and closed modes respectively.
- figs. 8 & 9 (Plate V) show an elevation and sectional view of a second embodiment of the gun's flow rate regulator as referred to in fig. 1, in open and closed modes respectively.
- fig. 10 (Plate VI) shows a possible working arrangement for a number of the spray guns referred to in this invention.
- an annular shape for the tube [7], terminating, at the upper end thereof where it engages with the piston [8], in an essentially spherical configuration, all to assist the free flow of nebulising air;
- various configurations for the openings [12], for example: circle [4.1], lozenge [4.2] and segmented circle [4.3] shapes;
- operation without use of the needle [3].
Claims (14)
- SPRAY GUN, also called airbrush, with the function of nebulising the liquid substance to be applied using air at higher than atmospheric pressure,
said gun being characterized in that
the device for regulating the flow rate of the substance to be sprayed is independent of the movement of the needle that regulates the opening and closing of the substance outlet nozzle. - SPRAY GUN, as described in claim No. 1, characterized in that the micrometric regulation of the flow rate of the substance to be sprayed is independent of the needle and outlet nozzle sizes.
- SPRAY GUN, as described in claim No. 2, characterized in that the regulation of the flow rate of the substance to be sprayed is independent of the needle movement for opening and closing the nozzle.
- SPRAY GUN, as described in claim No. 1, characterized in that the device that regulates the flow rate of the substance to be sprayed is automatically controlled, using the same flow of air [PL / K] that activates the needle control device.
- SPRAY GUN, as described in one or more of the preceding claims, of the type that comprises a casing [2], within which runs the needle [3], which engages in the flow profile of the nozzle [4], onto which is fixed the atomizer [5], held in place by the retaining ring [6], on the casing [2] with openings [H] and [K] formed to allow for the inlet, respectively, of nebulising air, conveyed via the tube [7] to the nozzle [4] and pressurised air which, when working, is used both to elevate the piston [8] so as to open inlet "H" and to raise the needle [3] so as to open the nozzle [4], said gun being characterized in that it provides for the flow rate of the liquid to be sprayed to be determined by means of a flow rate regulator [20] located externally on the casing [2] and communicating with the nozzle [4] via channel [13] formed in the above casing and connected externally to the liquid inlet tube [L].
- SPRAY GUN, as described in claim No. 7, characterized in that the flow rate regulator [20] comprises a casing [21], fixed to the casing [2] of the gun, a piston-pin [22] acting as a shutter for the channel [13], capable of running axially between the opening and closing positions of the channel and vice versa and where the reciprocating movement of the piston-pin [22] occurs by means of the thrust action of the pressurised air [PL] on the piston [23] in the opening phase and, when the above airflow ceases, through the reverse thrust of the spring [24], retained by hub [25] which is fixed to the casing [21] in the closing phase and where the liquid flow rate from the tube [L] to the channel [13] is determined, at the operating stage, by the position of the piston-pin [22], which stops against the spindle [26].
- SPRAY GUN, as described in claim No. 5, characterized in that the micrometric regulation of the stop limit of the spindle [26] is achieved through the rotation of the outer sleeve [27], fixed to the above spindle, which is screwed onto the hub [25] and where part of the hub [25] is provided with longitudinal ribbing [28] and a click-pin [29], fixed to the sleeve, which engages with this ribbing.
- SPRAY GUN, as described in claim No. 5, characterized in that the micrometric regulation of the stop limit of the spindle [26] is achieved automatically through the equilibrium between the thrust action of pressurised air flow [PF] on the piston [30], fixed to the above spindle and the reverse thrust of a spring [31] contained within the outer sleeve [27].
- SPRAY GUN, as described in one or more of the preceding claims, characterized in that the regulation of air flow occurs by means of the partial constriction of the through holes [14] in the fixed disc [15] by rotating the ring [16] provided with holes [17], so that the usable air flow profile, [S] equates to the free area resulting from the partial overlap of each pair of holes [14 / 17].
- SPRAY GUN, as described in claim No. 9, characterized in that the angular rotation of the ring [16], for regulating the overlap of the two through holes [14 / 17], is achieved by means of a threaded connection consisting of a grub screw [18] which is screwed into the casing [2] and engages with a threaded section [19] formed in the ring [16].
- SPRAY GUN, as described in one or more of the preceding claims, characterized in that the tube [7] has an annular shape, terminating, at the upper end [7.1] where it engages with the piston [8], in an essentially spherical configuration.
- SPRAY GUN, as described in one or more of the preceding claims, characterized in that the openings [12] are, for example, in the form of circles [4.1], lozenges [4.2] or a segmented circle [4.3].
- SPRAY GUN, as described in one or more of the preceding claims, characterized in that it is able to operate without using the needle [3].
- SPRAY GUN, as described in one or more of the preceding claims, characterized in that it is supplied by the same flow rate regulator [10] that simultaneously supplies two or more spray guns [1.1, 1.2 & 1.3] and regulates their liquid substance flow rate.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITVI20040128 | 2004-05-24 | ||
IT000128A ITVI20040128A1 (en) | 2004-05-24 | 2004-05-24 | SPRAYING GUN |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1600216A2 true EP1600216A2 (en) | 2005-11-30 |
EP1600216A3 EP1600216A3 (en) | 2005-12-28 |
Family
ID=34936547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05010568A Withdrawn EP1600216A3 (en) | 2004-05-24 | 2005-05-16 | Spray gun |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1600216A3 (en) |
IT (1) | ITVI20040128A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006030365A1 (en) * | 2004-09-17 | 2006-03-23 | Huzar Power Sp. Z O. O. | Working - fluid injector for a piston steam engine |
FR2916657A1 (en) * | 2007-05-30 | 2008-12-05 | Techniplast Sarl | Fluid product e.g. cosmetic product, distribution nozzle closing device for fluid distribution device, has needle valve with locking portion having tab that presents inner and outer sides, which are not plane and parallel |
ITVR20120018A1 (en) * | 2012-01-31 | 2013-08-01 | Todesco S R L | DISTRIBUTION DEVICE FOR A LIQUID PRODUCT |
ITUB20160716A1 (en) * | 2016-02-12 | 2017-08-12 | Andrea Pegoraro | SPRAYING DEVICE |
CN108499764A (en) * | 2018-06-02 | 2018-09-07 | 上海华立电子工程有限公司 | Piston atomizer |
DE102020107044A1 (en) | 2020-03-13 | 2021-09-16 | André Hiessl | Spray device for applying small amounts of a spray medium |
ES2878477A1 (en) * | 2020-05-18 | 2021-11-18 | Counterfog Ebt De La Uah Sl | Portable equipment for rapid decontamination (Machine-translation by Google Translate, not legally binding) |
CN115143482A (en) * | 2022-07-25 | 2022-10-04 | 淮南中建材腾锋环保科技有限公司 | High-temperature-resistant organic waste liquid incineration spray gun |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113738074B (en) * | 2021-09-15 | 2022-12-13 | 绍兴职业技术学院 | Impact type mortar mechanized spraying gun |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1083943A (en) * | 1952-09-29 | 1955-01-13 | Spray head for spray gun | |
US3450092A (en) * | 1965-07-08 | 1969-06-17 | Vilbiss Co The De | Color change apparatus |
US4368852A (en) * | 1981-03-23 | 1983-01-18 | Nordson Corporation | Combination spray gun and pressure regulator |
FR2552345B1 (en) * | 1983-09-27 | 1985-12-20 | Sames Sa | ELECTROSTATIC PAINT APPARATUS WITH PNEUMATIC SPRAYER ON MOBILE SUPPORT, ADJUSTABLE IN OPERATION |
JP2000005647A (en) * | 1998-06-23 | 2000-01-11 | Fuso Seiki Kk | Spray gun |
-
2004
- 2004-05-24 IT IT000128A patent/ITVI20040128A1/en unknown
-
2005
- 2005-05-16 EP EP05010568A patent/EP1600216A3/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
None |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006030365A1 (en) * | 2004-09-17 | 2006-03-23 | Huzar Power Sp. Z O. O. | Working - fluid injector for a piston steam engine |
FR2916657A1 (en) * | 2007-05-30 | 2008-12-05 | Techniplast Sarl | Fluid product e.g. cosmetic product, distribution nozzle closing device for fluid distribution device, has needle valve with locking portion having tab that presents inner and outer sides, which are not plane and parallel |
ITVR20120018A1 (en) * | 2012-01-31 | 2013-08-01 | Todesco S R L | DISTRIBUTION DEVICE FOR A LIQUID PRODUCT |
ITUB20160716A1 (en) * | 2016-02-12 | 2017-08-12 | Andrea Pegoraro | SPRAYING DEVICE |
CN108499764A (en) * | 2018-06-02 | 2018-09-07 | 上海华立电子工程有限公司 | Piston atomizer |
DE102020107044A1 (en) | 2020-03-13 | 2021-09-16 | André Hiessl | Spray device for applying small amounts of a spray medium |
ES2878477A1 (en) * | 2020-05-18 | 2021-11-18 | Counterfog Ebt De La Uah Sl | Portable equipment for rapid decontamination (Machine-translation by Google Translate, not legally binding) |
WO2021234202A1 (en) * | 2020-05-18 | 2021-11-25 | Counterfog Ebt De La Uah S.L | Portable rapid decontamination equipment |
CN115143482A (en) * | 2022-07-25 | 2022-10-04 | 淮南中建材腾锋环保科技有限公司 | High-temperature-resistant organic waste liquid incineration spray gun |
Also Published As
Publication number | Publication date |
---|---|
ITVI20040128A1 (en) | 2004-08-24 |
EP1600216A3 (en) | 2005-12-28 |
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