CN102112749A

CN102112749A - Priming device for electric pumps

Info

Publication number: CN102112749A
Application number: CN200980131116.6A
Authority: CN
Inventors: F·思尼克
Original assignee: DAB Pumps SpA
Current assignee: DAB Pumps SpA
Priority date: 2008-08-08
Filing date: 2009-08-05
Publication date: 2011-06-29
Also published as: ES2572205T3; EP2310685B1; IT1391670B1; ITPD20080249A1; EP2310685A1; WO2010015650A1

Abstract

A priming device (10) for electric pumps (11) comprises means for the automatic filling of the pump body (12) upon starting with liquid that originates from the same basin (13) from which the electric pump (11) is designed to draw when it is in the steady-state condition, an electronic controller (14) for the coordinated management of the power-on and power- off of the automatic filling means and of the electric motor (15) of the electric pump (11), and liquid level sensor means (16), which are associated with the pump body (12) and interconnected with the electronic controller (14), in order to detect the level of liquid inside the pump body (12).

Description

The automatic starting gear that is used for motor-drive pump

Technical field

The present invention relates to be used for self-starting (priming) device of motor-drive pump.

Background technique

Such as the such motor-drive pump of automatic start type motor-drive pump, centrifugal electric pump especially, the water supply that is specially adapted to home system, small scale-farm, gardening and needs the place etc. of moving liquid usually.

Self-starting function is the ability that pump in the pump startup process (if this pump is positioned under the pressure head) is drawn into liquid intake line.

In order to realize this point, usually must be at first with wanting the liquid of pumping to fill the pump housing.

All automatic start type pumps can both produce partial vacuum, the true(-)running of this partial vacuum sufficient to guarantee pump in the pumping step process.

When pump stopped, the one-way valve that is included in the pump housing can stop pump housing emptying, therefore when pump restarts, can carry out self-starting apace.

The self-starting ability makes pump need not fill intake line just can use these pumps.

This centrifugal electric pump often since the part user lack technical ability not in advance charge pump produce fault, these users are not owing to forget, exactly because he does not know that the pump housing of motor-drive pump needs a certain amount of liquid ability true(-)running that is pumped.

This kind carelessness must make motor-drive pump do operation, and its result causes the destruction of pump seal, and normally, pump seal need come lubricated with the liquid itself that transmits.

Simultaneously, not have liquid just turbulent flow can not occur in the pump housing, in order producing liquid to be risen to partial vacuum required in the pump housing outside pump, described turbulent flow need to occur, therefore, motor-drive pump basically can not pumping liquid, makes the user disappointed and dissatisfied.

Summary of the invention

Target of the present invention provides the automatic starting gear that is used for motor-drive pump, and it can avoid the shortcoming of known type motor-drive pump.

In this target, the purpose of this invention is to provide and guarantee the correct automatic starting gear that starts of motor-drive pump, even originally the user does not pour into the pump housing, connected motor-drive pump is correctly started.

Another purpose of the present invention provides a kind of automatic starting gear, and it does not damage connected electronic pump characteristics.

Another purpose of the present invention provides a kind of automatic starting gear, and it can advantage is arranged equally be applicable to centrifugal pump and motor-drive pump, also is applicable to the pump of other type.

Another purpose of the present invention provides the automatic starting gear that is used for motor-drive pump of a kind of available known system and technology manufacturing.

This target and the above-mentioned purpose that reaches other will become clearer hereinafter, realize above-mentioned target and purpose by the automatic starting gear that is used for motor-drive pump, it is characterized in that it comprises:

-automatically filling the device of the pump housing when being used to start with liquid, this liquid is taken from the same liquid pool that will extract that designs when motor-drive pump is in steady state condition,

-electronic controller, it is used for the Kai Heguan of described self-filler of coordinated management and electronic pump motor, and

-liquid level sensing device, its related with the pump housing and with the interconnection of described electronic controller so that survey liquid level in the described pump housing.

Description of drawings

From following but non-exclusive embodiment's preferred detailed description to the present invention, will understand other feature and advantage of the present invention better, described preferred embodiment provides by means of the non-limiting instance in the accompanying drawing, in the accompanying drawing:

Fig. 1 is the diagrammatic side view that is fitted with according to the centrifugal motor-drive pump of automatic start type of automatic starting gear of the present invention;

Fig. 2 is the sectional view according to the details of apparatus of the present invention;

Fig. 3 is the view according to device of the present invention that is applicable to horizontal centrifugal electric pump;

Fig. 4 is the view according to device of the present invention that is applicable to vertical centrifugal electric pump;

Fig. 5 is the view according to device of the present invention, and this device is organized into a unit and is applicable to the pipeline of sending of pump class.

Embodiment

With reference to accompanying drawing, the automatic starting gear that is used for motor-drive pump according to the present invention is always represented with reference character 10.

For example, the automatic starting gear 10 among Fig. 1 is shown as and is fitted on the self-starting type centrifugal electric pump 11, but it must be understood that this device also can be fitted on the motor-drive pump of other type.

When being included in pump startup, automatic starting gear 10 according to the present invention automatically fills the device of the pump housing 12, the same liquid pool 13 that designing institute will extract when this liquid was taken from motor-drive pump 11 and is in steady state condition with liquid.

This device 10 also comprises: electronic controller 14, and it is used for the Kai Heguan of the motor 15 of this self-filler of coordinated management and motor-drive pump 11; And liquid level sensing device (will be described in more detail below), it is associated with the pump housing 12 and interconnects with described electronic controller 14, so that survey the liquid level in the pump housing 12.

In this article in the embodiment of the invention by means of limiting examples description of the present invention, this automatic filling device is made of vacuum pump 16, this vacuum pump 16 is suitable for being fixed on the automatic breathing pipe 18 of the known type on the pump housing 12 tops by means of pumping tube 17 and by insertion, suction airs in the pump housing 12 of motor-drive pump 11.

Automatically breathing pipe 18 has float 22 in cup shell 19, and this cup shell 19 has bottom 20, and it is screwed on the collar 21 of the correspondence that forms on the pump housing 12.

Float 22 is connected to the lid 23 of cutting out described cup shell 19 by means of arm 24, and float pivots with respect to arm; And arm 24 pivots with respect to lid 23.

Arm 24 is supporting pintle plug 25, and this pintle plug stops up or open the inlet hole 26 that is formed in the lid 23 according to the rising or the descending motion of float 22, and pumping tube 17 is connected to this inlet hole 26.

Liquid level sensing device is made of magnet 27, and magnet 27 is formed in the float 22, and facing position or displacement transducer 28, and position or displacement transducer 28 for example are the Reed ball (Reed bulb) that is arranged in cup shell 19 outsides of automatic breathing pipe 18.

Be connected to the motion of the magnet 27 of the displacement transducer 28 detection floats 22 on the controller 14.

Electronic controller 14 and vacuum pump 16 are enclosed in their housing 29 of protection.

In the ingress of delivery tube 30, safety check 31 is arranged, it makes vacuum pump 16 produce needed partial vacuum, and the risk of extracting air from delivery tube 30 not.

Operation according to automatic starting gear 10 of the present invention is described below.

When at first starting motor-drive pump 11, electronic controller 14 is surveyed the pump housing 12 and whether is contained the pumping liquid for the treatment of that is enough to correct primer pump aequum by means of position or displacement transducer 28.

If the liquid levels in the pump housing 12 are lower than default liquid level, then controller 14 is opened vacuum pump 16, make vacuum pump 16 from increase in pipeline 32 and from the pump housing 12 extracting air, in air, carrying secretly till the amount of liquid that fully fills up the pump housing 12 that comes from liquid pool 13; Simultaneously, the impeller of motor-drive pump 11 keeps transfixion.

When the float 22 of automatic breathing pipe 18 is promoted by liquid and rises, sensor magnet 28 moves up, whether the liquid that electronic controller 14 is surveyed in the pump housing 12 by means of sensor 28 has reached correct liquid level, and simultaneously, the motion of arm 24 is blocked hole 26 with pintle plug 25.

Controller 14 stops vacuum pump 16, and actuating motor 15 and wheel rotor and start actual pumping.

In Fig. 3, device 10 according to the present invention is shown as on the centrifugal electric pump 111 of the level of being installed in.

In Fig. 4, device 10 according to the present invention is shown as on the upper end of the pump housing 212 that is installed in vertical centrifugal electric pump 211 (for example, for multi-stage type).

Automatic starting gear 10 according to the present invention can be used as pump and the motor-drive pump that unit easily is applicable to known type, and in use the pump as demonstrating among Fig. 5.

Fig. 5 illustrates and general sends pipeline 330 from what the pump housing was drawn, downstream at safety check, having pipeline to be connected to this sends on the pipeline 330, this pipeline is used to be connected to automatic breathing pipe 18, automatically breathing pipe 18 is connected to vacuum pump 16, and by insertion position or displacement transducer 28 and with electronic controller 14 interconnection.

The unit of model shown in Fig. 5 is finished by container and containment vessel 333, and it comprises the various elements of device 10 and is sent pipeline 330 and pass, and sends pipeline 330 and is surrounded by seal ring 334 easily.

The present invention who has found that description like this has in practice reached desired target and purpose.

Especially, the invention provides the automatic starting gear that is used for motor-drive pump, it even the user does not fill the pump housing itself at first, also can guarantee the correct startup of the motor-drive pump that automatic starting gear is associated by means of vacuum pump or other device that is equal to.

In addition, the invention provides a kind of automatic starting gear that is used for motor-drive pump, it does not damage the electronic pump characteristics related with it.

Also have, the invention provides a kind of automatic starting gear that is used for motor-drive pump, it makes motor-drive pump safety related with it, and the risk of the too early wearing and tearing that incorrect startup brings when not having liquid owing to pump housing inside.

In addition, the invention provides a kind of automatic starting gear, it avoids any the diverting one's attention and neglect of user, does not cause the dissatisfied of user, makes what the pump related with it can move all the time.

Also have, the invention provides a kind of automatic starting gear, it is applicable to centrifugal electric pump, automatic start type or non-automatic start type motor-drive pump, but also is applicable to non-centrifugal, similarly and other the motor-drive pump that is equal to.

In addition, the invention provides a kind of automatic starting gear that is used for motor-drive pump, its available known system and technology are made.

So the present invention of design is easy to make many modifications and change, and all such modifications and change are all within the scope of attached claims; Also available other the technical element that is equal to of all details substitutes.

In practice, material therefor with and size, as long as it is compatible with special use, reaching state of the art as requested can be arbitrarily.

The application requires the senior interest to disclosures in Italian patent application No.PD2008A000259, and this paper is to introduce the content of this patent referring to mode.

In the situation of the technical characteristics heel drawings attached mark of in any claim, mentioning, including these reference characters in only is in order to improve the intelligibility of claims, therefore, this reference character does not have the effect of any restriction for the annotation of each element that is for example indicated by reference character like this.

Claims

1. automatic starting gear (10) that is used for motor-drive pump (11) is characterized in that described automatic starting gear (10) comprising:

-automatically filling the device of the pump housing (12) when being used to start with liquid, described liquid is taken from described motor-drive pump (11) the same liquid pool (13) that designing institute will extract when being in steady state condition,

-electronic controller (14), described electronic controller (14) are used for the Kai Heguan of the motor (15) of described self-filler of coordinated management and described motor-drive pump (11), and

-liquid level sensing device, described liquid level sensing device related with the described pump housing (12) and with described electronic controller (14) interconnection so that survey liquid level in the described pump housing (12).

2. device as claimed in claim 1 is characterized in that, described self-filler is made of vacuum pump (16).

3. device as claimed in claim 2 is characterized in that, described vacuum pump (16) be suitable for by means of pumping tube (17) and by insertion be fixed on the described pump housing (12) top automatic breathing pipe (18) and from the interior suction air of the described pump housing (12).

4. as one or multinomial described device in the above-mentioned claim, it is characterized in that, described liquid level sensing device is made of magnet (27), described magnet (27) is formed in the float (22) of described automatic breathing pipe (18), and for example is the position of Reed ball or displacement transducer (28) towards cup shell (19) outside that is arranged in described automatic breathing pipe (18).

5. as one or multinomial described device in the above-mentioned claim, it is characterized in that described electronic controller (14) and described vacuum pump 16 are enclosed in the housing (29).

6. as one or multinomial described device in the above-mentioned claim, it is characterized in that, in the ingress of delivery tube (30) safety check (31) is arranged, described safety check (31) makes described vacuum pump (16) produce needed negative pressure, and the risk of extracting air from described delivery tube (30) not.

7. the method for or multinomial described self-starting pump in an operation such as the above-mentioned claim is characterized in that described electronic controller (14) is suitable for carrying out following operation:

-when at first starting described motor-drive pump (11), described electronic controller (14) is surveyed the pumping liquid for the treatment of that whether the described pump housing (12) contains is enough to the correct amount that starts by means of the device of the interior liquid level of the described pump housing of sensing (12),

If-described liquid level sensing device indicates liquid and is in default liquid level, then described electronic controller (14) does not activate described vacuum pump (17), and activates the described motor (15) of described impeller,

If the interior liquid level of-the described pump housing (12) is lower than default liquid level, then described electronic controller (14) activates described vacuum pump (16), make described vacuum pump (16) extracting air from the described pump housing (12), in air, carrying secretly till the liquid of the amount that fully fills the described pump housing (12) itself that comes from described liquid pool (13), the described impeller of described motor-drive pump (11) keeps motionless simultaneously

If the liquid that-described liquid level sensing device detects in the described pump housing (12) has arrived correct liquid level, then described controller (14) stops described vacuum pump (16), and starts the self-starting that described motor (15) rotates described impeller and starts reality.

8. motor-drive pump, it is characterized in that, described motor-drive pump comprises the automatic starting gear (10) that is used for motor-drive pump (11), described automatic starting gear (10) comprises again: automatically fill the device of the pump housing (12) when being used to start with liquid, described liquid is taken from described motor-drive pump (11) the same liquid pool (13) that designing institute will extract when being in stable state; Electronic controller (14), described electronic controller (14) are used for the Kai Heguan of the motor (15) of described self-filler of coordinated management and described motor-drive pump (11); And liquid level sensing device (16), described liquid level sensing device (16) related with the described pump housing (12) and with described electronic controller (14) interconnection so that survey liquid level in the described pump housing (12).