WO2015022011A1 - Dispositif de commande pour système de pompage de liquide et système de pompage de liquide comportant un tel dispositif de commande - Google Patents

Dispositif de commande pour système de pompage de liquide et système de pompage de liquide comportant un tel dispositif de commande Download PDF

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Publication number
WO2015022011A1
WO2015022011A1 PCT/EP2013/066844 EP2013066844W WO2015022011A1 WO 2015022011 A1 WO2015022011 A1 WO 2015022011A1 EP 2013066844 W EP2013066844 W EP 2013066844W WO 2015022011 A1 WO2015022011 A1 WO 2015022011A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve body
channel
control device
liquid
flow
Prior art date
Application number
PCT/EP2013/066844
Other languages
German (de)
English (en)
Inventor
Bernhard Beck
Timo Jeutter
Frank DICKNER
Mario TROST
Jörg SCHMID
Original Assignee
Alfred Kärcher Gmbh & Co. Kg
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 Alfred Kärcher Gmbh & Co. Kg filed Critical Alfred Kärcher Gmbh & Co. Kg
Priority to PCT/EP2013/066844 priority Critical patent/WO2015022011A1/fr
Publication of WO2015022011A1 publication Critical patent/WO2015022011A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0022—Control, e.g. regulation, of pumps, pumping installations or systems by using valves throttling valves or valves varying the pump inlet opening or the outlet opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F04D15/0227—Lack of liquid level being detected using a flow transducer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0446—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces
    • F16K17/046—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces the valve being of the gate valve type or the sliding valve type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F16K37/0033—Electrical or magnetic means using a permanent magnet, e.g. in combination with a reed relays

Definitions

  • the invention relates to a control device for a liquid pump arrangement, having a flow channel which extends from a channel inlet to a channel outlet, and having a valve body movably arranged in the flow channel for releasing and interrupting a flow connection between the channel inlet and the channel outlet, and with a sensor device for Detecting the valve body in dependence on its position in the flow channel.
  • the invention relates to a liquid pump assembly, in particular for use in the home and / or garden, with a motor and a pump, wherein the pump comprises a pump housing having a pumping chamber in which a motor-driven pumping member for conveying the liquid is arranged, and with a motor control for controlling the motor.
  • Fluid pump assemblies having a motor and a motor-driven pump are known in various configurations. They are used, for example, for domestic and / or garden use, whereby rainwater from their collection point, for example a pond or a rainwater tank, can be conveyed to a liquid delivery device connected to the liquid pump arrangement.
  • a liquid delivery device for example, a faucet, a spray nozzle or a spray gun can be used.
  • the user can optionally open and close the liquid delivery member.
  • Such fluid pump assemblies are known from the publication DE 199 23 357 AI.
  • a control device is used to control the pump for use with a flow sensor arranged downstream of the pump and downstream of the flow sensor. arranged, separately trained pressure switch.
  • the flow sensor is integrated in a check valve.
  • the check valve has a flow passage extending from a passage inlet to a passage outlet and receiving a movably mounted valve body which is tightly engageable with a valve seat for interrupting flow communication between the passage inlet and the passage outlet and which is for releasing fluid communication between the passage Channel inlet and the channel outlet is movable to a position downstream of the valve seat.
  • a permanent magnet is arranged on the valve body and with the aid of a magnetic-field-sensitive sensor, the valve body can be detected as a function of its position in the flow channel.
  • the pressure prevailing downstream of the check valve rises within a short time via a switching threshold and the motor of the liquid pump arrangement is switched off by the pressure switch. If the user releases the liquid delivery at the liquid delivery device at a later time, the valve body lifts off from the valve seat and is detected by the magnetic-field-sensitive sensor, which then provides a sensor signal under which the motor is switched on again.
  • Object of the present invention is to provide a control device of the type mentioned in such a way that it allows a more cost-effective control of the liquid pump assembly.
  • the flow channel has a closing region and a release region, wherein the flow connection between the channel inlet and the channel outlet in a positioning of the valve body in the closing area is interruptible and releasable in a positioning of the valve body in the release area wherein the valve body in the closing area in response to the force acting on the valve body pressure of the liquid against the action of one or more return elements is movable and wherein the valve body in the release region depending on the flow rate of the flow channel flowing liquid against the action of one or more return elements movable is.
  • the valve body of the control device can move within the flow channel in a closing region and in a release region. If the valve body is in the closing area, it interrupts the flow connection between the channel inlet and the channel outlet.
  • the closing region may, for example, extend over a length of about one quarter to about three quarters of the total length of the flow channel.
  • the position which the valve body assumes within the closing region depends on the pressure acting on the valve body. This is the pressure of the liquid that prevails when the flow communication between the channel inlet and the channel outlet downstream of the valve body is interrupted. If the valve body is in the release area, it releases the flow connection between the channel inlet and the channel outlet.
  • the release area may extend, for example, over a length of about one quarter to about three quarters of the total length of the flow channel.
  • the position occupied by the valve body within the release area is determined by the flow rate of the flow mungskanal flowing liquid dependent. At a low flow rate, the valve body occupies a position within the release area at a closer distance to the closing area, and at a high flow rate, the valve body within the release area occupies a position at a greater distance from the closing area.
  • the valve body can be detected as a function of its position in the flow channel. From the sensor device, a sensor signal can be provided which depends on the pressure acting on the valve body and on the flow rate of the fluid in the flow channel.
  • the control device forms a check valve and additionally has the function of a flow sensor and a pressure sensor.
  • the motor of a liquid pump arrangement can be controlled in a simple manner. If liquid is dispensed by the liquid pump arrangement via the liquid delivery member, the valve body is moved by the liquid flowing through the flow channel against the action of at least one restoring element within the release region into a release position spaced from the closing region. If the user stops the liquid delivery of the liquid pump assembly by the user closes the liquid delivery member, then the valve body is no longer flowed around by liquid. This has the consequence that the valve body moves under the action of at least one restoring element in the direction of the closing area in a rest position.
  • the reaching of the rest position can be detected by the sensor device and then the motor of the liquid pump arrangement can be switched off. With the switching off of the motor eliminates the conveying effect of the pump and the enclosed between the valve body of the control device and the liquid discharge member and pressurized liquid moves the valve body within the closing area against the action of at least one return element in the release area facing away Direction in a predetermined closed position.
  • the achievement of the predetermined closed position can also be detected by the sensor device. If the user releases the liquid at a later time, the pressure acting on the valve body decreases and the valve body is moved by at least one restoring element from the predetermined closed position in the direction of the release area. Leaving the closed position can also be detected by the sensor device and then the motor of the liquid pump assembly can be turned on again.
  • valve body of the control device in contrast to known non-return valves, in which the valve body rests immovably against a rigid valve seat when the valve is closed, the valve body of the control device according to the invention can move within the closing area in the event of an interrupted flow connection between the channel inlet and the channel outlet, depending on the pressure acting on the valve body. This makes it possible to provide a control signal for switching on the motor of the liquid pump arrangement by means of the sensor device when the pressure acting on the valve body drops and the valve body moves within the closing area in the direction of the release area.
  • a sensor signal for switching off the pump can be provided by the sensor device when the liquid flow in the flow channel is omitted and the valve body - after he has previously taken a position in the release area - moves in the direction of closing. Slight variations in the flow rate or pressure of the liquid also do not adversely affect the control of the liquid pump assembly, such as the appearance of air bubbles in the liquid.
  • the control device according to the invention thus combines the function of a check valve with the functions of a flow and a pressure sensor.
  • valve body tightly rests in the closing area on a channel wall of the flow channel.
  • the dense plant of the Valve body on the channel wall has a reliable interruption of the flow connection between the channel inlet and the channel outlet result.
  • valve body has a sealing element, which slides along a movement of the valve body within the closing area on the channel wall.
  • the sealing element conveniently comprises a sealing lip.
  • the sealing element is designed as an O-ring.
  • valve body is slidably held in the flow direction of the liquid.
  • the flow channel is designed in a straight line and the valve body is held linearly displaceable within the flow channel.
  • the closing region of the flow channel is designed cylindrically in an advantageous embodiment of the invention or it expands in the flow direction of the liquid.
  • a conical configuration of the closing area has proven to be advantageous.
  • a conical configuration of the closing area has the advantage that the pressing force acting on the sealing element increases increasingly within the closing area. This leads to an increasing sealing effect.
  • the cone angle of the closing area is preferably less than 5 °, in particular less than 1 °, for example 0.6 °.
  • the release area has a first partial area with a smaller diameter that adjoins the closing area and an adjoining second partial area with a larger diameter.
  • the flow rate of the liquid is advantageously not more than 60 liters per hour.
  • the flow rate of the fluid is advantageously more than 60 liters per hour.
  • the valve body is detectable in the first part of the sensor device. This gives the possibility to turn off the engine of the liquid pump assembly, if the valve body is longer than a predetermined time interval with the engine in the first sub-range, because a longer stay of the valve body in the first sub-range with the engine running and thus with active pump indicates a lack of flow around the valve body with liquid, in particular to a lack of liquid, so that there is a risk of damage to the pump.
  • the residence time of the valve body in the first portion of the release area is therefore detectable in an advantageous embodiment of the invention and when a predetermined maximum length of stay is exceeded when the engine is switched on, the motor can be conveniently switched off by means of the control device.
  • the release area is conveniently aligned in line with the closing area. This makes it possible to move the valve body in a straight line within the closing area and the release area with constant alignment. conditions.
  • the structural design of the control device is thereby simplified.
  • the control device conveniently comprises a guide member on which the valve body is movably mounted.
  • the guide member may, for example, be arranged adjacent to the channel inlet and form a guide on which the valve body is slidably mounted.
  • the guide can be configured in particular in the form of an opening, which is penetrated by a guide tappet of the valve body.
  • the control device in an advantageous embodiment, a screen or filter element, which is arranged upstream of the closing region.
  • a screen or filter element which is arranged upstream of the closing region.
  • valve body assumes a predetermined rest position under prevailing given flow and pressure conditions in the flow channel under the action of the at least one return element. If the valve body is moved out of its rest position due to the action of a pressure or due to the action of the fluid flowing through the flow channel, the at least one restoring element exerts a restoring force on the valve body.
  • At least one return element is formed in a preferred embodiment of the invention as a return spring. With increasing distance, which occupies the valve body to the rest position, an increasing restoring force is exerted on the valve body by the return spring.
  • the return spring is supported advantageously on the one hand on a guide member of the control device and on the other hand on a support surface of the valve body.
  • the return spring may be formed, for example, as a helical spring which surrounds a guide tappet of the valve body in the circumferential direction.
  • control device has two return springs, wherein the valve body in a position upstream of the rest position of a first return spring and a positioning downstream of the rest position of a second return spring can be acted upon with a restoring force.
  • the two return springs can have different spring constants.
  • a first return spring is clamped between a guide member of the control device and the valve body.
  • a second return spring may be clamped, for example, between the guide member of the control device and a spring holder which is fixed to a guiding member of the valve body which passes through the guide member.
  • valve body can be detected by means of the sensor device in the rest position predetermined by the at least one return element. It can be provided that the valve body assumes the rest position when it is subject to neither a pressure load nor a load through the liquid flowing through the flow channel. A detection of the valve body in the rest position, for example, for an error detection advantage. If the valve body is in its rest position for a long time when the pump is switched on, it is possible a lack of fluid, which could lead to damage to the pump, so that the pump should be shut off as a precaution.
  • the valve body in the rest position favorably occupies a position immediately adjacent to the closing area within the release area.
  • the valve body expediently releases a predetermined flow cross-section for the liquid or interrupts the flow connection between the channel inlet and the channel outlet.
  • liquid with a flow rate of about 20 to 120 l / h, preferably 60 l / h can flow through the flow channel when the valve body assumes its rest position.
  • valve body can be detected by means of the sensor device in at least two positions within the flow channel.
  • the valve body is detectable on the one hand in a position which it occupies when closing the liquid delivery member with active pump, and if it is detectable on the other in a position which it occupies after closing the liquid discharge member with the pump off.
  • a positioning of the valve body in a predetermined rest position can be distinguished from a positioning of the valve body in a closed position arranged upstream of the rest position. From the sensor device can thus be reliably distinguished whether the valve body is in its rest position or in a closed position disposed upstream of the rest position.
  • a positioning of the valve body in the rest position of a Positioning of the valve body in a downstream of the rest position arranged release position is distinguishable.
  • the sensor device has at least two sensor elements, which are arranged in the flow direction of the liquid at a distance from each other.
  • At least one of the sensor elements can be designed, for example, as a reed contact or, for example, as a magnetic field-sensitive sensor, in particular as a Hall sensor.
  • the sensor elements have non-overlapping detection regions for detecting the valve body. If the valve body is located in one of the detection areas, it is reliably detected by one of the sensor elements. Since the detection areas do not overlap one another, the position of the valve body can be determined particularly easily, since in each case only one of the sensor elements outputs a corresponding sensor signal.
  • the time sequence of the sensor signals of different sensor elements can be determined.
  • the determination of the chronological order of the sensor signals makes it possible to detect the direction of movement of the valve body. This makes it possible to control the motor of the liquid pump assembly in response to the direction of movement of the valve body.
  • the invention also relates to a liquid pump arrangement, in particular for use in the household and / or in the garden, wherein the liquid pump arrangement comprises a motor and a pump.
  • the pump comprises a pump housing with a pumping chamber, in which a pump member driven by the motor for conveying the liquid, for example an impeller, is arranged.
  • the fluid pump assembly also includes a motor controller for controlling the motor.
  • the liquid pump assembly according to the present invention Invention a control device of the type described above, the sensor device is connected to the engine control.
  • the motor can be switched on and off in a simple manner by means of the control device, wherein the control device forms a check valve.
  • the control device is advantageously arranged upstream of the pumping chamber.
  • the flow channel of the control device is arranged between a pump inlet of the pump and the pumping chamber.
  • the sensor device preferably has at least one sensor element for non-contact detection of the valve body movably arranged in the flow channel.
  • At least one sensor element is arranged in an advantageous embodiment of the invention on the outside of the pump housing.
  • the pump housing upstream of the pumping chamber comprises a shaft into which a channel body forming the flow channel of the control device can be inserted and the channel body can be removed as required, the valve body being movably mounted in the channel body.
  • the channel body in combination with the valve body forms a check valve located upstream of the pumping chamber.
  • a pump outlet can be connected via a fluid line, such as a garden hose, a liquid delivery member for dispensing liquid.
  • a fluid line such as a garden hose
  • a liquid delivery member for dispensing liquid.
  • the valve body With proper dispensing of liquid, the valve body assumes a release position, which is preferably outside the detection range of the at least one sensor element. If, in a preferred embodiment of the liquid pump arrangement according to the invention, the liquid delivery member is closed by the user, then the flow of the liquid acting on the valve body is eliminated and the valve body assumes a rest position under the action of a return element. The reaching of the rest position starting from the release position can be detected by the sensor device, which can then provide a signal for switching off the motor of the liquid pump arrangement. After switching off the engine, the fluid trapped and pressurized between the valve body and the sealed fluid delivery member forces the valve body into a predetermined one
  • Closed position Reaching the closed position can also be detected by the sensor device.
  • the sensor device When the fluid delivery member is reopened by the user to continue delivery of fluid, the pressure within the pumping chamber decreases. This has the consequence that the valve body is moved by a return element from the closed position in the flow direction to the front. Leaving the closed position can be detected by the sensor device, which then provides the motor control a signal to turn on the engine.
  • the valve body can now move over the rest position into a predetermined by the flow rate of the liquid release position.
  • the valve body in the rest position can be briefly detected by the sensor device, without the motor control being provided with a control signal.
  • the direction of movement of the valve body from the closed position to the rest position can be determined by means of the sensor device on the basis of the temporal sequence of sensor signals.
  • the pump space can conveniently be filled by the user with liquid via the shaft.
  • the shaft has a duct constriction to which the channel body can be pressed against the action of a return spring, wherein between the duct constriction and the channel body, a sealing element is arranged.
  • the channel body can be moved by the return spring in a position at a distance from the manhole constriction, so that liquid can flow around the channel body and can pass unhindered into the pump chamber.
  • the channel body After the filling of the pump chamber with liquid, the channel body can be pressed against the action of the return spring against the manhole narrowing, so that the liquid can not flow around the channel body unhindered, but then the flow channel provided by the channel body forms the only access to the pump chamber, the is released only when the valve body occupies a position within the flow channel within the release area.
  • the shaft preferably has an opening which can be closed by a cover.
  • the channel body of the control device can be acted upon by the cover with a force in the direction of the duct constriction.
  • This facilitates the handling of the liquid pump assembly when filling the pump chamber with liquid.
  • the user can remove the lid from the opening. This eliminates the force exerted by the lid on the channel body force in the direction of the manhole constriction.
  • the above-explained return spring moves the channel body away from the manhole narrowing, so that liquid filled in the shaft can flow around the channel body and can pass unhindered into the pump chamber from the valve body.
  • the opening can be closed again by means of the lid. This has the consequence that the cover presses the channel body against the manhole constriction and liquid closing can only pass through the channel body to the pumping chamber.
  • a sieve or filter element is conveniently arranged between the lid and the channel body.
  • the contact force exerted by the cover can be transmitted to the channel body via the sieve or filter element.
  • the screen or filter element is advantageously detachably connected to the channel body.
  • a bayonet connection can be used. This allows the user to easily remove the screen or filter element for cleaning of the channel body.
  • Figure 1 a perspective view of a liquid pump assembly according to the invention
  • Figure 2 is a schematic partial longitudinal sectional view of a pump with integrated control device of the liquid pump assembly of Figure i;
  • Figure 4 is a schematic sectional view corresponding to Figure 3, wherein the
  • Valve body assumes a rest position
  • Figure 5 a schematic sectional view corresponding to Figure 3, wherein the
  • Valve body occupies a closed position.
  • an advantageous embodiment of a liquid pump assembly according to the invention in the form of a garden pump is shown schematically schematically, which is generally occupied by the reference numeral 10.
  • the garden pump 10 comprises an outer housing 12, which is formed by a first housing half shell 14 and a second housing half shell 16.
  • the two housing halves 14, 16 take between them a motor pump unit 18 with an electric motor 20 and a driven by the electric motor 20 liquid pump 22.
  • the garden pump 10 has a motor controller 24 and a main switch 26th
  • the liquid pump 22 has a pump housing 28 made of a plastic material, which surrounds a pumping chamber 30.
  • a pumping member in the form of an impeller 32 is rotatably mounted, which can be rotated by the electric motor 20 in rotation.
  • an outlet line 34 leads to a pump outlet 36.
  • An outlet line for example a garden hose, can be connected to the pump outlet 36 in the usual way and therefore not shown in the drawing to achieve a better overview, which at its liquid pump 22 remote end carries a liquid discharge member through which the liquid pumped by the liquid pump 22 can be dispensed.
  • the fluid delivery device may be selectively opened and closed by the user to control fluid delivery.
  • the pump housing 28 Upstream of the pumping chamber 30, the pump housing 28 forms a filling shaft 38, via which the pumping chamber 30 liquid can be supplied.
  • the filling shaft 38 has a filling opening 40 which can be closed by a screw cap 42.
  • an inlet port 44 opens into the filling shaft 38.
  • the inlet port 44 forms a pump inlet 46, to which a person skilled in the known and therefore not to achieve a better overview in the drawing shown supply line, for example, a supply hose can be connected. Via the supply line can be supplied to the pump inlet 46 to be conveyed liquid.
  • the control device 50 comprises a channel body 52, which defines a flow channel 54.
  • the flow channel 54 has a filling opening 40 facing the first channel section 56, which merges via a radially inwardly directed step 58 into a second channel section 60.
  • the second channel section 60 extends to a conical channel enlargement 61, to which a third channel section 62 adjoins, which extends to a shaft opening 64 of the filling shaft 38 facing away from the filling opening 40.
  • the first channel section 56 forms a channel inlet 66 facing the filler opening 40 and the third channel section 62 has two channel outlets 68, 70 on diametrically opposite sides.
  • the channel body 52 of the feed tube 38 forms a radially inwardly directed manhole constriction 72, to which the channel body 52 can be applied with the interposition of a sealing element.
  • the sealing element is formed in the illustrated embodiment as an O-ring 74.
  • the first channel section 56 has a radially outwardly directed support edge 76.
  • the first channel section 56 is surrounded in the circumferential direction by a first return spring 78, which is supported on the one hand on the support edge 76 and on the other hand on the shaft constriction 72.
  • the first return spring 78 forms a compression spring, which acts on the channel body 52 with a spring force, which is directed with respect to the longitudinal axis 80 of the filling shaft 38 axially upwards.
  • a guide member 82 is arranged, which is fixed to the step 58 and which has a aligned with the longitudinal axis 80 aligned passage 84.
  • the passage 84 forms a guide for a guide tappet 94 which is integrally connected to a valve body 86 movably arranged in the flow passage 54.
  • the valve body 86 is designed substantially bell-shaped and surrounded in the circumferential direction by a sealing element in the form of a sealing ring 90.
  • the sealing ring 90 has a sealing lip 92.
  • the linearly oriented guide tappet 94 adjoins the valve body 86 coaxially with the longitudinal axis 80 and engages through the passage 84 and, adjacent to its free end facing away from the closing body 88, carries a plate-shaped spring holder 96.
  • a second return spring 98 is clamped between the spring holder 96 and the guide member 82.
  • the second return spring 98 forms an actuator for positioning the valve body 86 in the flow channel 54.
  • the second return spring 98 surrounds the guide tappet 94 in the region between the spring holder 96 and the guide member 82nd
  • a third return spring 100 is clamped.
  • the third return spring 100 forms a further actuator for positioning the valve body 86 in the flow channel 54.
  • a filter element 102 is immersed, which extends from the step 58 to the screw cap 42 and is detachably connected to the channel body 52.
  • the filter element 102 is releasably connected via a bayonet connection 104 shown only roughly schematically in the drawing with the channel body 52.
  • bayonet connections 104 are known per se to those skilled in the art and, in the present case, would not require any detailed explanation.
  • the channel body 52 is acted upon by the filter element 102 with the action of the first return spring 78 opposing pressure force under the action of the channel body 52 with the interposition of the O-ring 74 rests tightly against the manhole constriction 72. Liquid supplied to the liquid pump 22 via the pump inlet 46 can thus reach the pumping chamber 30 only via the flow channel 54 when the filling opening 40 is closed by the screw cap 42, but it can not flow around the channel body 52 when the filling opening 40 is closed.
  • the first return spring 78 raises the channel body 52 so far that it assumes a distance from the manhole throat 72 and liquid filled via the filling opening 40 into the filling shaft 38 the channel body 52 can flow around unhindered. This makes it possible to fill the pumping chamber 30 to start up the garden pump 10 via the filling opening 40 with liquid.
  • valve body 86 carries on the outside of a permanent magnet 106.
  • the permanent magnet 106 is associated with a sensor device 108 which is disposed at the level of the second channel portion 60 on an outer side 110 of the pump housing 28.
  • the sensor device 108 comprises a first sensor element 112, which is arranged in the axial direction with respect to the longitudinal axis 80 at a small distance from the step 58.
  • the sensor device 108 has a second sensor element 114, which faces away from the step 58 at an axial distance from the first sensor element 112.
  • the flow channel 54 forms the conical channel extension 61 in the transition region between the second channel section 60 and the third channel section 62.
  • the flow channel 54 Upstream of the canal Extension 61, that is in the region between the channel extension 61 and the step 58, the flow channel 54 forms a closing region 118, and downstream of the channel extension 61, that is in the region between the channel extension 61 and the shaft bottom 64, the flow channel 54 forms a release region 120 out. If the valve body 86 is located in the closing area 118, then it bears against the channel wall 122 of the flow channel 54 in a liquid-tight manner with the sealing lip 92. Upon movement of the valve body 86 within the closing area 118, the sealing lip 92 slides along the channel wall 122.
  • valve body 86 If the valve body 86 is located in the release area 120, it occupies a distance from the channel wall 122, in that an annular gap 124 is formed between the sealing lip 92 and the channel wall 122. Liquid may flow from the channel inlet 66 through the annular gap 124 to the channel outlets 68, 70 when the valve body 86 occupies a position within the release area 120. However, if the valve body 86 is in the closing area 118, the flow connection between the channel inlet 66 and the channel outlets 68, 70 is interrupted by the valve body 86.
  • the release area 120 is aligned coaxially with the closing area 118.
  • the flow channel 54 is configured conically in the closing area 118, wherein it widens with increasing distance from the channel inlet 66. This has the consequence that the sealing lip 92 is subject to an increasing radially inwardly directed pressing force, the farther the valve body 86 moves in the direction away from the release region 120 - in FIGS. 2 to 5, ie upwards. The increasing pressing force increases the sealing effect of the sealing lip 92.
  • the release region 120 connects to a first portion 121 which extends to the edge of the channel outlets 68, 70.
  • the release area 120 forms a second partial area 123, which due to the channel outlets 68, 70 has a larger flow cross section than the first subregion 121. The flow cross section therefore changes abruptly during the transition from the first subregion 121 to the second subregion 123.
  • the two sensor elements 112 and 114 are configured in the form of magnetic field-sensitive sensors which are electrically connected to the motor control 24 via a sensor line 126.
  • the valve body 86 is reciprocally movable within the flow passage 54 in response to the pressure and flow connections forming within the flow passage 54 in the axial direction. As already explained, it breaks the flow connection between the channel inlet 66 and the channel outlets 68, 70 when it is within the closing area 118 and releases the flow communication between the channel inlet 66 and the channel outlets 68, 70 as it moves within the Release area 120 is located.
  • valve body 86 assumes a closed position adjacent to the first sensor element 112, as shown in FIG. 5, then it is located in the detection area of the first sensor element 112 and is detected by it. In the closed position, the valve body 86 completely interrupts the flow connection between the channel inlet 66 and the channel outlets 68, 70.
  • valve body 86 assumes a rest position adjacent to the second sensor element 114, as shown in FIG. 4, then it is located in the detection area of the second sensor element 114 and is detected by it. In the rest position, the valve body 86 can be flowed around by the liquid at a flow rate of a maximum of 60 l / h. In the rest position, the valve body 86 is located in the first subregion 121 of the release region 120.
  • the two sensor elements 112, 114 are arranged at such a distance from each other that their detection areas do not overlap but join each other.
  • valve body 86 If the valve body 86 is located in the second subregion 123 of the release region 120, i. E. in the region of the channel outlets 68, 70, it occupies a clear distance from the first sensor element 112 and the second sensor element 114 and can not be detected by the sensor elements 112 and 114. If neither a sensor signal is provided by the first sensor element 112 nor by the second sensor element 114, this indicates that the valve body 86 assumes a release position, as illustrated in FIG. The valve body 86 assumes this release position if the liquid pump 22 is switched on and liquid is dispensed from the liquid pump 22 via the pump outlet 36. In this case, the flow passage 54 is traversed by liquid, under the action of the valve body 86 is moved against the spring force of the second return spring 98 in the channel inlet 66 facing away from the direction.
  • valve body 86 initially assumes its rest position under the action of the second return spring 98. If the main switch 26 is subsequently actuated, then the electric motor 20 is switched on, whereby any signals of the sensor elements 112, 114 are initially ignored. After a short period of time, which may be 30 seconds, for example, the position of the valve body 86 is queried. During proper operation, the valve body 86 is due to the liquid flowing around it in its release position and thus outside the detection ranges of the sensor elements 112, 114, as shown in Figure 3.
  • valve body 86 If the valve body 86 is still in its rest position and thus in the detection range of the second sensor element 114 after the said period of time has elapsed, and is detected by the latter This indicates a lack of flow around, for example because of a disturbance, for example due to a lack of liquid, so that there is a risk of damaging the liquid pump 22. In this case, the electric motor 20 is turned off. If the valve body 86 is outside the detection ranges of the two sensor elements 112, 114 at the end of the stated period, then it assumes its release position and the electric motor 20 remains in operation, so that liquid from the garden pump 10, for example via a garden hose and at the free end can be dispensed connected to the garden hose fluid delivery device.
  • the electric motor 20 is turned off due to the sensor signal provided by the second sensor element 114.
  • a fluid pressure builds up in the garden hose, which acts as an accumulator.
  • the fluid enclosed between the valve body 86 and the fluid delivery member pushes the valve body 86 into the closed position shown in FIG. 5 and thus into the detection area of the first sensor element 112.
  • the garden pump 10 is now in a stable standby mode. Status.
  • the valve body 86 When the liquid discharge is released by the user by opening the liquid discharge member, the pressure falls downstream of the valve body 86, and under the action of the third return spring 100, the valve body 86 is moved out of the detection range of the first sensor element 112 toward the release region 120.
  • the first sensor signal provided by the first sensor element 112 thereby drops and due to this signal drop the electric motor 20 is switched on again.
  • the liquid pump 22 is thereby put back into operation and the valve body 86 is moved by the liquid flowing around it back into the release position shown in Figure 3.
  • the valve body 86 in this case moves briefly through the detection range of the second sensor element 114, so that it is briefly detected by the second sensor element 114 and the second sensor element provides a short-term, pulse-like sensor signal.
  • This short-term sensor signal has no change in the operation of the electric motor 20 result. Rather, the sensor device recognizes 108 from the chronological order of the sensor signals of the sensor elements 112, 114, the direction of movement of the valve body 86 which moves in the present case after switching on the liquid pump 22 properly in a release position.
  • the control device 50 thus makes it possible, in a structurally simple manner, to switch the electric motor 20 on and off as a function of the pressure and flow conditions prevailing in the flow channel 54 and at the same time provides a check valve for the garden pump 10.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

La présente invention concerne un dispositif de commande (50) pour un système de pompage de liquide (10), présentant un canal d'écoulement (54) dans lequel est agencé de manière mobile un corps de soupape (86) permettant de libérer et de bloquer une liaison d'écoulement entre une entrée de canal (66) et une sortie de canal (68, 70), et un dispositif capteur (108) permettant de détecter le corps de soupape (86) en fonction de sa position dans le canal d'écoulement (54). Selon l'invention, afin de perfectionner le dispositif de commande de telle sorte qu'il puisse commander de manière peu coûteuse un système de pompage de liquide (10), le canal d'écoulement (54) comporte une zone de blocage (118) et une zone de libération (120). La liaison d'écoulement entre l'entrée de canal (66) et la sortie de canal (68, 70) est bloquée lorsque le corps de soupape (86) est placé dans la zone de blocage (118), et cette liaison est libérée lorsque le corps de soupape (86) est placé dans la zone de libération (120). Le corps de soupape (86) peut se déplacer dans la zone de blocage (118) en fonction de la pression de liquide agissant sur ledit corps, à l'encontre de l'action d'un ou plusieurs éléments de rappel (100), et le corps de soupape (86) peut se déplacer dans la zone de libération (120) en fonction du débit de liquide s'écoulant dans le canal d'écoulement (54), à l'encontre de l'action d'un ou plusieurs éléments de rappel (98). L'invention concerne également un système de pompage de liquide (10) comportant un tel dispositif de commande (50).
PCT/EP2013/066844 2013-08-12 2013-08-12 Dispositif de commande pour système de pompage de liquide et système de pompage de liquide comportant un tel dispositif de commande WO2015022011A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2013/066844 WO2015022011A1 (fr) 2013-08-12 2013-08-12 Dispositif de commande pour système de pompage de liquide et système de pompage de liquide comportant un tel dispositif de commande

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2013/066844 WO2015022011A1 (fr) 2013-08-12 2013-08-12 Dispositif de commande pour système de pompage de liquide et système de pompage de liquide comportant un tel dispositif de commande

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019152959A3 (fr) * 2018-02-05 2019-09-12 Franklin Electric Co., Inc. Protection contre les pannes pour ensemble pompe-moteur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19923357A1 (de) 1998-10-07 2000-04-13 Gardena Kress & Kastner Gmbh Flüssigkeitspumpenanordnung, insbesondere für die Verwendung in Haus und/oder Garten
US20050045839A1 (en) * 2003-09-02 2005-03-03 Smc Corporation Vacuum regulating valve
US20060201556A1 (en) * 2005-03-08 2006-09-14 Hamza Hassan H Swimming pool vacuum relief safety valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19923357A1 (de) 1998-10-07 2000-04-13 Gardena Kress & Kastner Gmbh Flüssigkeitspumpenanordnung, insbesondere für die Verwendung in Haus und/oder Garten
US20050045839A1 (en) * 2003-09-02 2005-03-03 Smc Corporation Vacuum regulating valve
US20060201556A1 (en) * 2005-03-08 2006-09-14 Hamza Hassan H Swimming pool vacuum relief safety valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019152959A3 (fr) * 2018-02-05 2019-09-12 Franklin Electric Co., Inc. Protection contre les pannes pour ensemble pompe-moteur
US11466691B2 (en) 2018-02-05 2022-10-11 Franklin Electric Co., Inc. Fault protection for a pump-motor assembly

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