US20140044578A1 - Powder pump for conveying coating powder - Google Patents

Powder pump for conveying coating powder Download PDF

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Publication number
US20140044578A1
US20140044578A1 US13/985,246 US201213985246A US2014044578A1 US 20140044578 A1 US20140044578 A1 US 20140044578A1 US 201213985246 A US201213985246 A US 201213985246A US 2014044578 A1 US2014044578 A1 US 2014044578A1
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United States
Prior art keywords
powder
pinch valve
connection element
region
powder pump
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
Application number
US13/985,246
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English (en)
Inventor
Marco Sanwald
Thomas Staub
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gema Switzerland GmbH
Illinois Tool Works Inc
Original Assignee
Gema Switzerland GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gema Switzerland GmbH filed Critical Gema Switzerland GmbH
Assigned to ILLINOIS TOOL WORKS INC. reassignment ILLINOIS TOOL WORKS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SANWALD, MARCO, STAUB, THOMAS
Publication of US20140044578A1 publication Critical patent/US20140044578A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/22—Arrangements for enabling ready assembly or disassembly
    • 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
    • B05B7/14—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 designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1459—Arrangements for supplying particulate material comprising a chamber, inlet and outlet valves upstream and downstream the chamber and means for alternately sucking particulate material into and removing particulate material from the chamber through the valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
    • B65G53/28—Systems utilising a combination of gas pressure and suction

Definitions

  • the present invention relates to a powder pump for conveying coating powder according to the preamble of independent patent claim 1 .
  • the invention relates to a powder pump which has a powder chamber with a preferably cylindrical and in particular circular-cylindrical casing tube and a gas-permeable filter element arranged inside the casing tube, with furthermore a first pinch valve, connected to the intake-side end region of the powder chamber, and a second pinch valve, connected to the delivery-side end region of the powder chamber, being provided, and with the powder chamber having at least one connection for alternately creating a positive pressure and a negative pressure in the powder chamber.
  • Such a powder pump is known in principle from the prior art.
  • document EP 1 551 558 A1 discloses a powder pump which has a first powder chamber and a second powder chamber, arranged parallel to the first powder chamber.
  • the powder chambers of the powder pump known from this prior art are respectively bounded both on the intake side and on the delivery side by a mechanically actuated pinch valve arrangement.
  • the powder hoses connected to the respective powder chambers can be deformed by a mechanically actuated rod in order to pinch off or open the hose portion as and when required.
  • the powder chambers of the known pump also each have a gas-permeable filter element.
  • a negative pressure can be set in the powder chambers separately from each other by way of a vacuum connection, as a result of which coating powder can be sucked into the powder chamber by way of the intake-side end region of the respective powder chamber.
  • the pinch valve provided at the intake-side end region of the powder chamber is closed and the pinch valve provided at the delivery-side end region of the powder chamber is opened.
  • the presence of a positive pressure in the powder chamber has the effect that the coating powder previously sucked into the powder chamber is again discharged from the powder chamber by way of the delivery-side end region.
  • a powder pump of the type described above has various disadvantages, in particular with regard to its maintenance.
  • a possibly clogged filter element can only be exchanged with relatively great effort, since virtually the complete powder pump has to be unscrewed for this purpose.
  • the solution known from this prior art does not allow a filter element to be exchanged without interfering with the structure of the pinch valves. There is consequently the risk of leakages occurring after maintenance or the exchange of the filter element, so that dependable functioning of the powder pump is no longer ensured.
  • the present invention is based on the object of developing a powder pump of the type mentioned at the beginning, and as known for example from the document EP 1 551 558 A1, to the extent that it can be maintained with relatively little effort, it being possible in particular for the gas-permeable filter element of the powder chamber to be exchanged without the risk of impairing the functioning of the pump.
  • the intake-side and delivery-side pinch valves of the powder pump are not directly connected to the powder chamber. Rather, the solution according to the invention uses a connection element, which is connected to the first (intake-side) pinch valve and is fitted onto or inserted into the intake-side end region of the powder chamber. Also used is a second connection element, which is connected to the second (delivery-side) pinch valve and is fitted onto or inserted into the delivery-side end region of the powder chamber.
  • the solution according to the invention has a mount in order to receive the powder chamber with the connection elements fitted on or inserted in on both sides.
  • a mount in order to receive the powder chamber with the connection elements fitted on or inserted in on both sides.
  • an arresting mechanism with which the connection elements, fitted onto or inserted into the powder chamber on both sides, are arrested in relation to the mount when the powder chamber with the connection elements fitted on or inserted in on both sides has been received by the mount.
  • the corresponding connection elements that are connected to the intake-side pinch valve and the delivery-side pinch valve are fitted onto or inserted into the corresponding end region of the powder chamber means that—for example for the purpose of maintenance—the powder chamber can be separated from the connection elements, and consequently from the corresponding pinch valves, by simply releasing this fitted or inserted connection.
  • the solution according to the invention it is possible in a simple way, for example when exchanging the gas-permeable filter element arranged in the powder chamber, to release the fitted or inserted connection between the corresponding connection element and the powder chamber.
  • the powder chamber with the filter element received therein is subsequently separate from the intake-side and delivery-side pinch valves.
  • connection elements fitted onto or inserted into the powder chamber on both sides are arrested in relation to the mount when the powder chamber with the connection elements fitted on or inserted in on both sides has been received by the mount.
  • serving as the arresting mechanism are a first bolt, connected to the first connection element and protruding radially from the first connection element, and a second bolt, connected to the second connection element and protruding radially from the second connection element.
  • These two bolts can each be received in a longitudinal slit, provided in the mount and running perpendicularly to the longitudinal direction of the powder chamber.
  • connection elements fitted onto or inserted into the powder chamber on both sides cannot move in the longitudinal direction in relation to the powder chamber when the powder chamber with the connection elements fitted on or inserted in on both sides has been received by the mount, and in particular when the first bolt, protruding radially from the first connection element, and the second bolt, protruding radially from the second connection element, have been received in the corresponding longitudinal slit provided in the mount.
  • the arresting mechanism has two first bolts, which are arranged diametrically in relation to each other, are each connected to the first connection element and each protrude radially from the first connection element, the mount having two first longitudinal slits for each receiving one of the two first bolts.
  • the arresting mechanism has two second bolts, which are arranged diametrically in relation to each other, are each connected to the second connection element and each protrude radially from the second connection element, the mount having two second longitudinal slits for each receiving one of the two second bolts.
  • the arresting of the connection elements fitted on or inserted in on both sides in relation to the powder chamber can be further improved if the end of the first longitudinal slit is adjoined at right angles by a short transverse slit or if the end of the second longitudinal slit is adjoined at right angles by a short transverse slit. In this way it can be effectively prevented that the powder chamber with the two connection elements fitted onto or inserted into the powder chamber on both sides can slide out of the longitudinal slits again.
  • connection elements are securely fixed in relation to the powder chamber during the operation of the powder pump, and in particular whenever the powder chamber with the connection elements fitted on or inserted in on both sides has been received in the mount.
  • To exchange the filter element received in the powder chamber it is merely required to take the powder chamber with the connection elements fitted on or inserted in on both sides out of the mount, the arresting of the connection elements being released at the same time. Consequently, taking the powder chamber out allows the connection elements fitted on or inserted in at the end regions of the powder chamber to be pulled out, in order thereby to release the fitted on or inserted in connection.
  • the filter element can subsequently be exchanged without any problem.
  • the subsequent installation of the powder chamber is performed in the reverse sequence.
  • the first connection element has a stub-like region, facing the powder chamber, and a tapering region, facing the first pinch valve and tapering conically in the direction of the first pinch valve, the stub-like region of the first connection element being fitted onto or inserted into the intake-side end region of the powder chamber and the conically tapering region of the first connection element being connected to the first pinch valve.
  • the second connection element also has a stub-like region, facing the powder pump, and a tapering region, facing the second pinch valve and tapering conically in the direction of the second pinch valve, the stub-like region of the second connection element being fitted onto or inserted into the delivery-side end region of the powder chamber and the conically tapering region of the second connection element being connected to the second pinch valve.
  • the stub-like region of the first or second connection element and the tapering region of the first or second connection element, tapering conically in the direction of the corresponding pinch valve are inserted in each other and releasably arrested in relation to each other, preferably with the aid of a screw.
  • each pinch valve has a pinch valve housing with an inlet-side flange region and an outlet-side flange region as well as an elastically deformable valve element, preferably in the form of a hose portion.
  • the valve element should be arranged inside the pinch valve housing in such a way that the inlet of the pinch valve can be brought into fluidic connection with the outlet of the pinch valve by way of the valve element formed as a hose portion.
  • the pinch valve housing has at least one connection for feeding compressed air as and when required into the space formed between the inner wall of the pinch valve housing and the valve element arranged inside the pinch valve housing.
  • a positive pressure is formed in the space between the inner wall of the pinch valve housing and the valve element, as a result of which the valve element is pressed together in the radial direction and the pinch valve is closed. If the pressure in the pinch valve housing is subsequently relieved, the valve element resumes its initial state, so that there is a fluidic connection between the inlet of the pinch valve and the outlet of the pinch valve by way of the valve element.
  • the pinch valve housing has at least one connection for creating a negative pressure as and when required inside the pinch valve housing. In this way, the opening time of the pinch valve can be reduced.
  • the invention is not restricted to the powder pump described above as such, but also includes an arrangement comprising a powder pump of the type described above and a further identical powder pump. This arrangement forms a coating powder conveying device.
  • Each powder pump of the coating powder conveying device has at least one gas path, by which the powder chamber can be connected alternately to a vacuum line, for sucking coating powder into the powder chamber through the open powder-inlet valve while the powder-outlet valve is closed, or to a compressed-air line, for pneumatically discharging a portion of powder present in the powder chamber through the open powder-outlet valve while the powder-inlet valve is closed.
  • the two powder pumps can be alternately switched over to sucking in and discharging powder, it being possible alternately to switch the one pump to intake and the other substantially at the same time to discharge in a first operating phase, and then to switch the one pump to discharge and the other substantially at the same time to intake in a second operating phase.
  • the gas path contains a suction-air opening and a compressed-air opening in a circumferential housing wall of the powder chamber, a microporous filter tube, which, at least over part of the length or preferably the entire length of the powder chamber, forms the circumferential wall of the powder chamber between the powder inlet and the powder outlet and separates the powder chamber from an annular chamber.
  • the annular chamber is formed between the outer circumference of the filter tube and the inner circumference of the circumferential housing wall and surrounds the filter element formed as a filter tube.
  • the filter tube is permeable to air, but not to coating powder on account of its small pore size. It preferably consists of a sintered material.
  • the suction-air opening preferably opens out into the annular chamber near to the powder outlet, and the compressed-air opening preferably opens out into the annular chamber near to the powder inlet.
  • a valve device or pneumatic subassembly which has for example two valves and can be controlled by a control device, may be provided.
  • FIG. 1 shows a schematic representation of a coating powder conveying device with two powder pumps arranged parallel to each other according to an exemplary embodiment of the present invention
  • FIG. 2 shows a perspective view of the internal structure of a coating powder conveying device with two powder pumps arranged parallel to each other according to an exemplary embodiment of the present invention
  • FIG. 3 shows a perspective view of the two powder pumps arranged parallel to each other of the coating powder conveying device according to FIG. 2 , each in the state in which they have been received in the associated powder chamber mount;
  • FIG. 4 shows a longitudinal sectional view of part of a powder pump used in the case of the coating powder conveying device according to FIG. 2 ;
  • FIG. 5 a shows an exploded representation of one of the two powder pumps that are used in the case of the coating powder conveying device according to FIG. 2 ;
  • FIG. 5 b shows a perspective view of one of the two powder pumps that are used in the case of the coating powder conveying device according to FIG. 2 .
  • each of the two powder pumps 100 , 100 ′ arranged parallel to each other has a powder chamber 10 , 10 ′, which is formed by a cylindrical, in particular circular-cylindrical, casing tube 1 , 1 ′ and a filter element 2 , 2 ′ received inside the casing tube.
  • Each powder chamber 10 , 10 ′ has a powder inlet 30 , 30 ′ with a powder-inlet valve 3 , 3 ′ and a powder outlet 31 , 31 ′ with a powder-outlet valve 4 , 4 ′.
  • the respective powder-inlet valves 3 , 3 ′ are also referred to hereafter as “first valves” or “intake-side valves”.
  • the powder-outlet valves 4 , 4 ′ are referred to as “second valves” or “delivery-side valves”.
  • a vacuum (negative pressure) is generated in the powder chamber 10 , 10 ′ of the powder pump 100 , 100 ′.
  • This negative pressure sucks the coating powder into the powder chamber 10 , 10 ′ by way of the corresponding powder inlet 30 , 30 ′.
  • the fine-porous filter element 2 , 2 ′ in the powder chamber 10 , 10 ′ separates the powder.
  • the powder chamber 10 , 10 ′ is connected to the output side or delivery side B by the delivery-side valve 4 , 4 ′.
  • the intake-side valve 3 , 3 ′ on the powder inlet side A of the powder chamber 10 , 10 ′ is closed, while the delivery-side valve 4 , 4 ′ is opened.
  • the coating powder previously sucked into the powder chamber 10 , 10 ′ during the intake process is then forced out of the powder chamber 10 , 10 ′ and further conveyed by means of positive pressure, which is built up by compressed air through the fine-porous filter element 2 , 2 ′.
  • the intake process and conveying process alternate between the two powder pumps 100 , 100 ′ arranged parallel to each other.
  • FIGS. 2 to 5 there follows a description of an exemplary embodiment of a coating powder conveying device in which two powder pumps 100 , 100 ′ arranged parallel to each other according to an embodiment of the present invention are used.
  • FIG. 2 shows in a perspective view the internal structure of a coating powder conveying device with two powder pumps 100 , 100 ′ arranged parallel to each other according to an exemplary embodiment of the present invention.
  • the coating powder conveying device has two powder pumps 100 , 100 ′, each of the two powder pumps 100 , 100 ′ having a powder chamber 10 , 10 ′ with a cylindrical and in particular circular-cylindrical casing tube 1 , 1 ′ and a gas-permeable filter element 2 , 2 ′ arranged inside the casing tube 1 , 1 ′.
  • the filter element 2 , 2 ′ is preferably a rigid body of sintered material, preferably of sintered metal, for example bronze or aluminum, or sintered plastic or a sintered material mixture.
  • each powder pump 100 , 100 ′ is a first pinch valve 3 , 3 ′, connected to the intake-side end region of the powder chamber 10 , 10 ′.
  • a second pinch valve 4 , 4 ′ is connected to the respective delivery-side end region of the powder chamber 10 , 10 ′.
  • pinch valves are respectively used as the powder-inlet and powder-outlet valves, they may be of any kind desired.
  • the powder-inlet side of the two first (intake-side) pinch valves 3 , 3 ′ are connected by way of supply-line branches 70 c , 70 b of a Y connecting piece 70 to a powder supply line, which leads for example to a powder container (not expressly represented in FIG. 2 ).
  • hose connectors 75 are used, in order to connect the powder-inlet side of the two first pinch valves 3 , 3 ′ to the supply-line branches 70 c , 70 b of the Y connecting piece 70 .
  • the powder outlets of the two second (delivery-side) pinch valves 4 , 4 ′ are connected by discharge-line branches 71 c , 71 b , for example of a Y-shaped line connecting piece 71 , to one end of a powder discharge hose, the other end of which opens out in a further powder container (not represented).
  • the powder discharge line may be a rigid pipeline, but is preferably a flexible hose.
  • the powder chambers 10 , 10 ′ of the two powder pumps 100 , 100 ′ arranged parallel to each other are each received in a mount 8 , 8 ′ and arrested there.
  • the manner in which the powder chambers 10 , 10 ′ are arrested and received in the respective mounts 8 , 8 ′ is described in more detail with reference to the following drawings.
  • the representation in FIG. 2 also reveals that the exemplary embodiment of the coating powder conveying device has a pump controller 50 and a pneumatic group 51 that can be activated by the pump controller 50 , in order to operate the two powder pumps 100 , 100 ′ arranged parallel to each other in phase opposition according to the functional principle described above with reference to FIG. 1 .
  • each powder pump 100 , 100 ′ that is used in the case of the coating powder conveying device according to FIG. 2 .
  • each powder pump 100 , 100 ′ has a casing tube 1 , 1 ′, inside which a gas-permeable filter element 2 , 2 ′ is arranged.
  • the casing tube 1 , 1 ′ with the filter element 2 , 2 ′ received inside it forms the powder chamber 10 , 10 ′ of the corresponding powder pump 100 , 100 ′.
  • a first (intake-side) pinch valve 3 , 3 ′ is provided at the intake-side end region of the powder chamber 10 , 10 ′.
  • a second (delivery-side) pinch valve 4 , 4 ′ is connected to the delivery-side end region of the respective powder chamber 10 , 10 ′.
  • the first (intake-side) pinch valve 3 , 3 ′ is shown in the assembled state, while the second (delivery-side) pinch valve 4 , 4 ′ is likewise shown in an exploded representation.
  • the structure and the functioning of the first and second pinch valves 3 , 3 ′; 4 , 4 ′ are identical in the embodiment represented.
  • each pinch valve 3 , 3 ′; 4 , 4 ′ has a pinch valve housing 21 , 21 ′ with an inlet-side flange 22 , 22 ′ and an outlet-side flange 23 , 23 ′.
  • An elastically deformable valve element 24 , 24 ′ is received in the pinch valve housing 21 , 21 ′.
  • This elastically deformable valve element 24 , 24 ′ is specifically an elastically deformable hose portion.
  • Each flange 22 , 22 ′; 23 , 23 ′ has a hose connection 77 , to which a powder hose can be connected.
  • valve element 24 , 24 ′ is arranged inside the pinch valve housing 21 , 21 ′ in such a way that the inlet of the pinch valve 3 , 4 ; 3 ′, 4 ′ can be brought into fluidic connection with the outlet of the pinch valve 3 , 4 ; 3 ′, 4 ′ by way of the valve element 24 , 24 ′ formed as a hose portion.
  • the pinch valve housing 21 , 21 ′ has a connection 9 , 9 ′, in order to feed compressed air as and when required into the space 26 , 26 ′ formed between the inner wall of the pinch valve housing 21 , 21 ′ and the valve element 24 , 24 ′ arranged inside the pinch valve housing 21 , 21 ′.
  • the valve element 24 , 24 ′ is elastically deformed, so that the fluidic connection between the inlet and the outlet of the pinch valve is interrupted.
  • a vacuum connection may also be connected by way of the at least one connection 9 , 9 ′ of the pinch valve, in order to evacuate the compressed air previously introduced into the intermediate space 26 , 26 ′ for rapid opening of the pinch valve.
  • each pinch valve is respectively releasably fastened to the pinch valve housing 21 , 21 ′ with the aid of screws 27 .
  • the pinch valve is configured as a component which can be connected to the appropriate powder chamber 10 , 10 ′ by way of a corresponding connection element.
  • each powder pump 100 , 100 ′ is provided with a first connection element 6 , 6 ′, which is fitted onto or inserted into the intake-side end region of the corresponding powder chamber 10 , 10 ′.
  • This connection element 6 , 6 ′ is connected to the first (intake-side) pinch valve 3 , 3 ′.
  • each powder pump 100 , 100 ′ has a second connection element 7 , 7 ′, which is fitted onto or inserted into the delivery-side end region of the powder chamber 10 , 10 ′ and connected to the second (delivery-side) pinch valve 4 , 4 ′.
  • the representation in FIG. 5 a reveals in particular that the first connection element 6 , 6 ′ has a stub-like region 16 , 16 ′, facing the powder chamber 10 , 10 ′, and a tapering region 17 , 17 ′, facing the first (intake-side) pinch valve 3 , 3 ′ and tapering conically in the direction of the first pinch valve 3 , 3 ′.
  • the stub-like region 16 , 16 ′ of the first connection element 6 , 6 ′ has in this case been fitted onto or inserted into the intake-side end region of the powder chamber 10 , 10 ′, while the conically tapering region 17 , 17 ′ of the first connection element 6 , 6 ′ has been connected to the first pinch valve 3 , 3 ′.
  • FIG. 4 reveals that, in the case of the preferred embodiment of the present invention, the stub-like region 16 , 16 ′ of the first connection element 6 , 6 ′ and the tapering region 17 , 17 ′ of the first connection element 6 , 6 ′, tapering conically in the direction of the first pinch valve 3 , 3 ′, are inserted in each other and releasably arrested in relation to each other, preferably with the aid of at least one countersunk screw.
  • the second connection element 7 , 7 ′ which has been fitted onto or inserted into the delivery-side end region of the powder chamber 10 , 10 ′ and connected to the second (delivery-side) pinch valve 4 , 4 ′, has a stub-like region 18 , 18 ′, facing the powder chamber 10 , 10 ′, and a tapering region 19 , 19 ′, facing the second pinch valve 4 , 4 ′ and tapering conically in the direction of the second pinch valve 4 , 4 ′, the stub-like region 18 , 18 ′ of the second connection element 7 , 7 ′ being fitted onto or inserted into the delivery-side end region of the powder chamber 10 , 10 ′ and the conically tapering region 19 , 19 ′ of the second connection element 7 , 7 ′ being connected to the second pinch valve 4 , 4 ′.
  • the stub-like region 18 , 18 ′ of the second connection element 7 , 7 ′ and the tapering region 19 , 19 ′ of the second connection element 7 , 7 ′, tapering conically in the direction of the second pinch valve 4 , 4 ′, are inserted in each other and releasably arrested in relation to each other, likewise preferably with the aid of at least one countersunk screw 20 .
  • Suitable O-rings 75 are preferably used for sealing the fitted or inserted connections used in the case of the solution according to the invention.
  • connection elements 6 , 6 ′ and second connection elements 7 , 7 ′ are respectively fitted onto or inserted into the intake-side or delivery-side end region of the powder chamber 10 , 10 ′.
  • the powder chamber 10 , 10 ′ with the connection elements 6 , 7 ; 6 ′, 7 ′ fitted on or inserted in on both sides is subsequently received in a mount 8 , 8 ′.
  • This mount 8 , 8 ′ also serves for arresting the connection elements 6 , 7 ; 6 ′, 7 ′, fitted onto or inserted into the powder chamber 10 , 10 ′ on both sides, in relation to the mount 8 , 8 ′ when the powder chamber 10 , 10 ′ with the connection elements 6 , 7 ; 6 ′, 7 ′ fitted on or inserted in on both sides has been received by the mount 8 , 8 ′.
  • first bolt 11 , 11 ′ connected to the first connection element 6 , 6 ′ and protruding radially from the first connection element 6 , 6 ′
  • second bolt 12 , 12 ′ connected to the second connection element 7 , 7 ′ and protruding radially from the second connection element 7 , 7 ′.
  • the end of the first longitudinal slit 13 , 13 ′ is adjoined at right angles by a short transverse slit 15 , 15 ′, in order to prevent unintentional sliding out of the powder chamber 10 , 10 ′ received in the mount 8 , 8 ′.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Coating Apparatus (AREA)
US13/985,246 2011-02-14 2012-02-13 Powder pump for conveying coating powder Abandoned US20140044578A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102011004035A DE102011004035A1 (de) 2011-02-14 2011-02-14 Pulverpumpe zum Fördern von Beschichtungspulver
DE102011004035.8 2011-02-14
PCT/US2012/024847 WO2012112436A1 (en) 2011-02-14 2012-02-13 Powder pump for conveying coating powder

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US20140044578A1 true US20140044578A1 (en) 2014-02-13

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US13/985,246 Abandoned US20140044578A1 (en) 2011-02-14 2012-02-13 Powder pump for conveying coating powder

Country Status (8)

Country Link
US (1) US20140044578A1 (ja)
EP (1) EP2675573B1 (ja)
JP (1) JP2014506862A (ja)
CN (1) CN103687673B (ja)
BR (1) BR112013020733A2 (ja)
CA (1) CA2827297A1 (ja)
DE (1) DE102011004035A1 (ja)
WO (1) WO2012112436A1 (ja)

Cited By (1)

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US20190023505A1 (en) * 2013-04-03 2019-01-24 Gema Switzerland Gmbh Dense phase powder pump and corresponding operating method

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Publication number Priority date Publication date Assignee Title
US20140261739A1 (en) 2013-03-15 2014-09-18 Nordson Corporation Dense phase pump with easily replaceable components
DE102014215338B4 (de) * 2014-08-04 2016-03-31 Gema Switzerland Gmbh Pulverabgabevorrichtung und Pulverbeschichtungsanlage zum Pulversprühbeschichten von Gegenständen
DE102015108492A1 (de) 2015-05-29 2016-12-01 Gema Switzerland Gmbh Verfahren zum Betreiben einer Pulverdichtstrompumpe sowie Pulverdichtstrompumpe
DE202019102993U1 (de) * 2019-05-28 2020-08-31 IBR Zerstäubungstechnik GmbH Zweistoffdüse
CN112691802A (zh) * 2020-12-09 2021-04-23 广东泽亨智能科技有限公司 一种供粉装置、粉料装置及喷涂系统
DE102021117797A1 (de) 2021-07-09 2023-01-12 Gema Switzerland Gmbh Pulverdichtstrompumpe mit quetschventil sowie quetschventil
DE102021117799A1 (de) 2021-07-09 2023-01-12 Gema Switzerland Gmbh Pulverdichtstrompumpe zum fördern von pulverigen materialien

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EP2675573B1 (en) 2014-11-26
JP2014506862A (ja) 2014-03-20
CN103687673B (zh) 2016-01-27
BR112013020733A2 (pt) 2017-10-17
WO2012112436A1 (en) 2012-08-23
CN103687673A (zh) 2014-03-26
DE102011004035A1 (de) 2012-08-16
CA2827297A1 (en) 2012-08-23
EP2675573A1 (en) 2013-12-25

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