• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a device (10) for spraying flowable fluids (1), having a spray head (11) having a longitudinal axis (14), which has a housing (15), in whose interior space (16) a guide body (30) is arranged is, wherein the guide body (30) has a longitudinal bore (31) for radially guiding a spray cannula (20), via which the fluid (1) can be dispensed, wherein between the guide body (30) and the housing (11) an annular space (32 ) is formed, which is flowed through by pressurized gaseous medium, in particular air, in the direction of an outlet opening (17) of the housing (15), and wherein in the region of the outlet opening (17) of the housing (15) has an axial end region (25) the spray cannula (20), from which the fluid (1) exits, is arranged with a radial gap.
    公开号:CH712915A2
    申请号:CH01040/17
    申请日:2017-08-21
    公开日:2018-03-15
    发明作者:Burk Tobias；Boussaid Chaima
    申请人:Bosch Gmbh Robert；
    IPC主号:
    专利说明:

    Description: PRIOR ART The invention relates to a device for spraying fluid fluids according to the preamble of claim 1. Furthermore, the invention relates to the use of such a device.
    A device with the features of the preamble of claim 1 is known from DE 10 2004 020 205 A1 of the applicant. The known device is characterized in that the fluid to be sprayed is discharged via a spray cannula connected to a product reservoir for the fluid. The spray cannula is surrounded at its outer periphery by a so-called paint nozzle, which serves as a guide body for the spray cannula, wherein the spray cannula is guided radially in the guide body. The paint nozzle or the guide body are arranged in an interior of the housing of a spray head, wherein the outside of the paint nozzle or the guide body is flowed around by over-pressure air, which serves to generate the desired spray of the fluid or the fluid from the entrain the axial end region of the spray cannula.
    It is essential in the device known from the cited document that the axial end region of the spray cannula, from which the fluid emerges, and the guide body are at least substantially aligned relative to one another with respect to the longitudinal direction of the spray cannula. This has the consequence that the aligned with the axial end portion of the spray cannula end face of the guide body tends to settle on it gradually fluid components and dry and thereby build up a disturbing layer. The layer which builds up on the guide body leads to an influence on the formation of the spray, so that the spray result is adversely affected. Furthermore, the adhering fluid can lead to contamination of a subsequent fluid, which, for example, can lead to distortions of the result, even with constant spray mist, given corresponding active ingredients. This is particularly critical in the use of pharmaceutical products. It is therefore necessary, if you want to achieve optimum quality of the spray result, always keep the corresponding end face of the guide body clean or clean. This requires additional effort and careful implementation.
    DISCLOSURE OF THE INVENTION The device for spraying flowable fluids with the features of claim 1 has the advantage that even without cleaning the guide body always achieves a good quality spray and contamination of subsequently processed fluid is avoided. The high spray quality is achieved in that no fluid can settle or build up any disturbing layer of fluid components on the end face of the guide body. As a result, the area of the guide body or of the area of the spray cannula is optimally flowed around by the medium under pressure (compressed air), so that the desired spray mist can be generated.
    The invention is based on the idea to reset the region of the guide body or its lower end face facing the spray cannula axially so far from the outlet opening of the spray cannula, from which the fluid emerges, that an axial distance is formed. This distance causes the fluid emerging from the spray cannula with pressure from settling on the corresponding end face of the guide body and can build up a disturbing layer. In this case, the necessary defined annular gap for atomizing the fluid is thus formed between the spray cannula and the spray head.
    Advantageous developments of the inventive device for spraying flowable fluids are listed in the subclaims.
    It is particularly preferred if the end face of the guide body viewed in the direction of a longitudinal axis of the spray head ends in front of the outlet opening of the housing in the interior of the housing. This has the consequence that the air flowing in the direction of the outlet opening of the housing can nestle around the outer circumference of the spray cannula and thus enables an optimized entrainment of the flowable fluid from the outlet opening of the spray cannula. In addition, thereby the end face of the guide body of the housing is mechanically protected and thus insensitive to external influences.
    An optimization of the air flow in the region of the guide body is achieved when the guide body is formed conically on the side facing its end side on its outer side.
    For easy replacement of the spray cannula, for example, if another medium and / or a different flow rate to be generated, it is provided that the spray cannula on the opposite side of its end portion with a fluid supply is interchangeable coupled.
    On the one hand to allow a desired radial guidance of the spray cannula in the guide body, and on the other hand to avoid that medium or fluid settles on the end face of the guide body, it is preferably provided that the end portion of the spray cannula the end face of the guide body between 1 mm and 5 mm surmounted.
    A further optimization in terms of the formation of the spray is achieved when the end portion of the spray cannula is aligned with the outlet opening of the housing in the direction of the longitudinal axis.
    A preferred use of the inventive device described so far is the spraying of paints, adhesives, pesticides or pharmaceutical products. In this case, the fluids mentioned in particular have a viscosity between 1 mPas and 1000 mPas. Also, a preferred use of the device is when the flow rate of the fluid through the spray cannula is between 1 ml and 300 ml per minute.
    Further advantages, features and details of the invention will become apparent from the following description and preferred embodiments and from the drawing.
    This shows in the single figure in a schematic representation a longitudinal section through an inventive device for spraying a flowable fluid.
    The device 10 shown in the single figure is used for spraying a flowable fluid 1 on a surface 100. The fluid 1 is in particular a paint, an adhesive or a pesticide, wherein the viscosity of the fluid 1 between 1 mPas and 1000 mPas. In addition, the flow rate of the fluid 1 sprayed onto the surface 100 by means of the device 10 is between 1 ml and 300 ml per minute.
    The device 10 has a spray head 11, the outer shape is formed in the illustrated embodiment is substantially cylindrical, wherein the spray head 11 has a longitudinal axis 14. The spray head 11 also has a cap-shaped housing 15, shown only in sections, for guiding air, which forms an interior 16. The cup-shaped or pot-shaped housing 15 in the illustrated area has concentric with the longitudinal axis 14 to an outlet opening 17 which is circular.
    Within the interior 16 of the housing 15, a spray cannula 20 is arranged concentrically to the longitudinal axis 14, which is substantially tubular, wherein on the side facing away from the outlet opening 17, the spray cannula 20 on its outer circumference has an exemplary annular adapter flange 21. By means of the adapter flange 21, the spray cannula 20 can be interchangeably coupled to a product supply line 22 for the fluid 1, so that the spray cannula 20 can be easily exchanged or spray nozzle 20 having a different dimension for other applications can be used.
    The Produktzuführleitung 22 is connected to a product storage tank 23 for the fluid 1, wherein the product reservoir tank 23 is exemplified by a first pressure source 24 is pressurized so that the fluid 1 is conveyed from an axial end portion 25 of the spray cannula 20 under pressure or out of this exit.
    In addition, it is mentioned that instead of the first positive pressure source 24, it is also possible, according to the DE 10 2004 020205 A1 of the Applicant to promote the fluid 1 from the product reservoir 23 by means of an adjustable piston.
    The inner diameter d, the spray cannula 20 is preferably between 0.5 mm and 2 mm, wherein the wall thickness d of the spray cannula 20 is also preferably between 0.1 mm and 0.5 mm. The axial end region 25 of the spray cannula 20, from which the fluid 1 exits, ends in the direction of the longitudinal axis 14 at least approximately aligned with the outlet opening 17 on the housing 15, such that between the outer circumference of the spray cannula 20 and the outlet opening 17, an annular passage opening 26th is formed, on which the fluid 1 is atomized.
    Within the interior 16 of the housing 15, a guide body 30 is also arranged, which serves for the radial guidance of the spray cannula 20 and the uniform air distribution in the spray head 11. The guide body 30 has a longitudinal bore 31, the inner diameter of which is adapted to the appearance diameter of the spray cannula 20 such that a radial guidance of the spray cannula 20 is made possible by the longitudinal bore 31. Between the outer circumference of the guide body 30 and the housing 15, an annular space 32 is formed, which can be flowed through by pressurized medium, in particular air, in the direction of the outlet opening 17 of the housing 15. For this purpose, the housing 15 is at least indirectly connected to a second pressure source 33, via which the medium is introduced into the interior 16 of the housing 15, wherein the direction of flow of the gaseous medium is indicated by the arrows 34.
    The guide body 30 has two sections 36, 37. The first section 36, which is arranged on the side facing away from the outlet opening 17 of the housing 15, is designed in the form of an external hexagon with a tool engagement surface 38 in order to be able to fasten or dismantle the guide body 30 within the spray head 12 in a manner not shown , On the side facing the outlet opening 17 of the housing 15, the second section 37 of the guide body 30 has a conically shaped outer surface 39, so that in connection with a section 41 of the housing 15 inclined in the region of the second section 37 of the guide body 30, the flow cross section for the pressurized gaseous medium or the annular space 32 is at least approximately constant and a uniform supply of the gaseous medium to the annular passage opening 26 is made possible.
    On the side facing the outlet opening 17 side, the second portion 37 of the guide body 30 has a narrow, circumferential end face 42 in the form of a small width having edge. It is also essential that between the axial end portion 25 of the spray cannula 20, from which the fluid 1 emerges, and the end face 42nd
    权利要求:
    Claims (10)
    [1]
    the guide body 30 - viewed in the direction of the longitudinal axis 14 - a distance a is formed, which is preferably between 1 mm and 5 mm. During operation of the device 10 and the spray head 12 exits from the axial end portion 25 of the spray cannula 20, the fluid 1 and forms a spray 2, which increases viewed in the direction of the surface 100 in cross-section. In this case, the formation of the spray 2 is controlled with regard to its shape and the droplet distribution by the air flowing around the axial end portion 25 of the spray cannula 20. Characterized in that the axial end portion 25 is disposed from the end face 42 of the guide body 30 at the distance a, and beyond the axial end portion 25 flows around the pressurized gaseous medium, no fluid 1 against its exit direction from the axial end portion 25th in the direction of the guide body 30 arrive to deposit there on the end face 42. The device 10 described so far can be modified or modified in many ways, without departing from the spirit. claims
    Device (10) for spraying flowable fluids (1), having a longitudinal axis (14) having a spray head (11) having a housing (15) in whose interior (16) a guide body (30) is arranged, wherein the guide body (30) has a longitudinal bore (31) for radially guiding a spray cannula (20), via which the fluid (1) can be dispensed, wherein an annular space (32) is formed between the guide body (30) and the housing (11) is, by the gaseous medium under pressure, in particular air, in the direction of an outlet opening (17) of the housing (15) can be flowed through, and wherein in the region of the outlet opening (17) of the housing (15) has an axial end portion (25) of the spray cannula (20), from which the fluid (1) exits, is arranged with a radial gap, characterized in that the guide body (30) on the outlet opening (17) of the housing (15) facing side has an end face (42) in relation to the endbere I (25) of the spray cannula (20) in the direction of the longitudinal axis (14) viewed in front of the end portion (25) terminates, so that the end portion (25) of the spray cannula (20) overhanging the end face (42) of the guide body (30).
    [2]
    2. Device according to claim 1, characterized in that the end face (42) of the guide body (30) in the direction of the longitudinal axis (14) viewed in front of the outlet opening (17) of the housing (15) in the interior (18) ends.
    [3]
    3. Apparatus according to claim 1 or 2, characterized in that the guide body (30) on its front side (42) facing side has a conical outer surface (39).
    [4]
    4. Device according to one of claims 1 to 3, characterized in that the inner diameter (d,) of the spray cannula (20) between 0.5 mm and 2 mm and the wall thickness (d) between 0.1 mm and 0.5 mm is.
    [5]
    5. Device according to one of claims 1 to 4, characterized in that the spray cannula (20) on the end region (25) opposite side with a Produktzuführleitung (22) is exchangeably coupled.
    [6]
    6. Device according to one of claims 1 to 5, characterized in that the end region (25) of the spray cannula (20) projects beyond the end face (42) of the guide body (30) by a distance (a) between 1 mm and 5 mm.
    [7]
    7. Device according to one of claims 1 to 6, characterized in that the end region (25) of the spray cannula (20) aligned with the outlet opening (17) of the housing (15) in the direction of the longitudinal axis (14) aligned.
    [8]
    8. Use of a device (10) according to any one of claims 1 to 7 for the spraying of paints, adhesives, pesticides or pharmaceutical products.
    [9]
    9. Use of a device (10) according to any one of claims 1 to 7 for fluids (1) having a viscosity between 1 mPas and 1000 mPas.
    [10]
    10. Use of a device (10) according to any one of claims 1 to 7 for a flow rate of the fluid (1) between 1 ml and 300 ml per minute.
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    同族专利:
    公开号 | 公开日
    CH712915B1|2021-02-26|
    DE102016217477A1|2018-03-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE102004020205A1|2004-04-22|2005-11-10|Robert Bosch Gmbh|Device for spraying spraying fluids|
    法律状态:
    2020-09-30| PUE| Assignment|Owner name: SYNTEGON TECHNOLOGY GMBH, DE Free format text: FORMER OWNER: ROBERT BOSCH GMBH, DE |
    2020-10-30| NV| New agent|Representative=s name: DREISS PATENTANWAELTE PARTG MBB, DE |
    2021-09-15| PK| Correction|Free format text: BERICHTIGUNG INHABER |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102016217477.0A|DE102016217477A1|2016-09-14|2016-09-14|Device for spraying flowable fluids and use of the device|
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