CN1013028B - Additive-feeding device for flowing fluid - Google Patents

Abstract

The present invention relates to a device for mixing flowing fluids, which comprises an outer casing with an inlet and an outlet, wherein a concentric bush is arranged in the outer casing; an additive for mix is filled in a bag arranged on a board provided with a path in the concentric bush. A fluid flows to the outlet from the inlet, pushes a valve head to open the path, and simultaneously, is pressurized to enter, press and squeeze the material bag for releasing the additive. The degree of opening the path by a needle-shaped valve is controlled by eccentric cam rotation caused by rotary knob rotation outside the outer casing in order to control the additive dose. A rotary board is arranged in a modified type, and a plurality of containers holding different additives and each needle-shaped valve are arranged on the rotary board. In rotation, one of the containers can be selectively communicated with the outlet by a shaft in order to release the additive, and simultaneously, other paths are closed.

Description

Additive-feeding device for flowing fluid

The present invention relates to a kind of device to the streaming flow batching.

Once proposed much to be intended to join the device of additive to streaming flow.Additive can be added in the water and purify waste water, and perhaps can be a kind of fertilizer, herbicide or other the material that is added in the irrigation water.It also can be a kind of lubricant that is added in the air that flows to pneumatic means.

United States Patent (USP) 3724601 and 4212373 discloses the device that utilizes the contractile bag that is subjected to the streaming flow impact extrusion.These structures all do not provide the measure that can adjust the additive flow rate, and the measure that the fluid flow rate that also do not afford redress changes also is not provided at the moving fluid of source of the gas or water source cut-out rear defence fluid stopping and pours into the interior measure of bag.

DE-A-1773459 discloses another such device, and in this device, fluid has a flow path that forms the reducing of pressure differential along one and flows.An outlet is arranged from drawing, have an inlet to enter in the flow path in reducing downstream at the flow path of reducing upstream.The pressure that forms in the flow path exit at first is used for controlling a valve that is located at the exit passageway of drawing from additive reservoir, forces additive to pass through exit passageway along with reservoir is pressurizeed.CA743403 discloses a kind of device, and this device has a shell that has an inlet and an outlet, and shell contains an additive reservoir.Control by a valve from the exit passageway that reservoir is drawn, this valve is opened by a pressure differential of striding thereon when fluid flows.In this structure, the flow rate of additive is controlled by a valve of operating from the outside.In these two specifications, all do not provide measure to regulate of the variation of the flow rate of additive automatically with compensatory pressure.

The object of the present invention is to provide device the above-mentioned type, that have more perfect structure and more favourable operating characteristic.

According to the present invention, a kind of device to the streaming flow batching is provided, it comprises a shell with a fluid intake and a fluid issuing, have in the enclosure and limit a device from the fluid flow path of this this outlet of inlet guiding, in this shell, there is an additive to supply the path of source and course along it from an additive to this fluid flow path, in this path, there is one to comprise a control valve that is located at the member in this flow path, this member is placed to like this, make fluid when this flow path flows, forming a pressure differential on this member, actuate this valve towards the direction of opening this path with joint efforts.This device also is provided with one can limit this valve opening moving on the direction from the device of enclosure operation, also be used for changing this valve and opening mobile distance on the direction.

Described device can contain one can be from the eccentric cam of enclosure rotation.This valve is a needle valve that has an enlarged head preferably, and this head constitutes this member.

Additive can comprise the container of a contractile thin-walled bag or a sclerine for the source.

Shell can be columnar, inlet is at an end of barrel shrond and export the other end at it, this device also comprises a cylindrical shape lining that a cross wall is arranged at the shell arrival end, a cylindrical shape gap is arranged between shell and lining, this gap forms the some of flow path, and an inlet drilling is arranged on cross wall, and the lining other end blocks for a plate, this piece plate can be lifted down from lining, path is arranged on the plate and have device to adorn a contractile thin-walled bag that fills a kind of additive.

In another structure, shell is columnar, inlet is at an end of barrel shrond and export the other end at it, this device also comprises a cylindrical shape lining, the end of this neck bush is by the cross wall shutoff, be provided with a check valve at the cross wall of shell arrival end and can flow in the lining, described path is then arranged on the cross wall of the lining other end by fluid.

By way of example and with reference to accompanying drawing, the present invention may be better understood.In the accompanying drawings,

Fig. 1 is an axial cutaway view to the device of streaming flow batching;

Fig. 2 is a follow-on axial cutaway view of the device of Fig. 1;

Fig. 3 is a kind of axial cutaway view of selecting one to the device of streaming flow batching from several additives;

Fig. 4 is the cutaway view that the part of a needle valve is cut open.

At first referring to Fig. 1, shown in proportioner comprise one totally by 10 shells that indicate, this shell comprises a cylindrical-shaped main body 12, and this main body has an inlet 14 at the one end, has a lid 16 that is screwed in screw thread on the main body 12 with the inlet 14 relative other ends.In main body 12, there is a lining 18 to be fixed on the interior mounting flange 20 of the some that constitutes main body 12.Between main body 12 inner faces and lining 18 outsides a cylindrical shape gap 22 is arranged, this gap is communicated with inlet 14 by the perforate on the flange 20 24.

A check-valves 26 is advanced in the inlet 14 by a spring 28, and spring 28 is placed on the horizontal end wall 30 of lining 18.When opening, valve 26 will enter the mouth 14 with the internal communication of lining 18 in a perforate 32 on the end wall 30.

A plectane 34 is put into the openend of lining 18.Lid 16 includes mounting flange 36 and 38 respectively with plate 34, has the screw of circumferentially extending or other securing member (not shown) that flange 36 and 38 is linked together.Flange 36 has several perforates 40 that gap 22 outlet with this device is communicated with, and exit label is 42 and constitutes the some of lid 16.Between the periphery of plate 34 and lining 18, a circlet shape gap is arranged.

A tapped supporting base 44 is arranged in the plate 34, and path 46 passes plate 34 and derives from supporting base 44.Path 46 includes one between two ends roughly be the sections of taper, and needle valve 48 just is placed in this conical segment.Valve 48(specifically sees Fig. 4) comprise two extensible members 51 and 53, a spring 55 is arranged in part 51.Spring 55 impels part 51 and 53 to push away mutually.Pin 57 passes the relative opening on the part 51 and passes axial elongated slot 59 on the part 53.Pin 57 limited parts 51 and 53 relative movable scope.Valve 48 has a head 49 that stretches into the increasing in the outlet 42.

There is an eccentric cam 50 to be contained on the axle 52 that passes outlet 42 wall.There is a sealing gasket 54 that a knob 56 is arranged around axle 52 and in the outer end of axle 52.Turning knob 56, the head 49 of needle valve 48 and the distance between the cam 50 just change, and so just can adjust the degree that needle valve is opened from this device outside.

Thin slice synthetic plastic bag of label 58 expressions has the conjunction 60 usefulness welding of a sleeve pipe and flange or the method for heat-sealing to be fixed on the sack.Be shaped on external screw thread on the sleeve pipe on sleeve pipe and the flange conjunction 60 with the threaded engagement of supporting base 44.

Another organization plan is that the screw thread on bag 58 the sleeve pipe replaces with an outer ring-like rib, and the screw thread of supporting base 44 then replaces with an inside groove.When the sleeve pipe of sack pushed in the supporting base 44, rib was connected to form a leakproof with the groove kayser together.Sack can be used the blow moulding manufacturing, this means that sack is a single piece and has a wall to block the sleeve pipe of the conjunction 60 of sleeve pipe and flange.Sack charges and seals at the relative end of sleeve pipe with the conjunction 60 of flange.In order to pierce through this wall and to open this sack, the ledge around path 46 inlets on plate 34 can be provided with a round cutter mouth, and this edge of a knife can the band saw tooth.Can cut any other structure of wearing bag wall on the overhang of plate 34 can use.

In use proportioner has entrance and exit flexible pipe (not shown) to be connected to inlet 14 and outlet 42.Pressure (hydraulic) water enters through inlet 14 and the active force that overcome spring 28 is opened valve 26.Water flows into annular gap 22 through perforate 24 and arrives outlet 42 by perforate 40 then.Pressurizeed by the water that is entered by the perforate on the end wall 30 32 in the inside of lining 18 simultaneously.Pressure in lining can compress sack 58.Simultaneously, the water that flows through needle valve 48 heads 49 affacts on the head and with valve and back promotes by overhead cam 50.The power that is added in head with part 53 toward pulling back, but can not move the degree of the termination of the groove 59 that makes pin 57 arrive 53 li of parts under the normal condition to.At the excessive pressure of 18 li of linings, that extrusion additive goes out the pressure of sack, by between plate 34 and lining 18, water escapes into by it that the size of the annular gap of main fluid path decides.The liquid additive of 58 li in sack like this through path 46 feed-in flowing water in and be pulled away.Increase the batching rate, make it that cam 50 is further moved apart plate 34 with regard to turn knob 56.Needle valve is further pushed to the right side by flowing water like this.Reduce the batching rate, just turn knob 56 in the opposite direction.This will compress spring 55, and spring is and then pushed part 51 to the left side, thereby has reduced the effective area that additive can flow through.Be applied to the power on the part 51 and the power that applied by spring 55 mutually offsets by the pressurization additive, part 51 just remains on the position that correct flow rate is provided.

The shape of the flow path of that part water will be set the exit that makes like this at path 46 for and produce a convergent validity in opening 40 downstreams, in path 46 outlets a low pressure is just arranged thus, and its promotes in additive stream entry.

When needs stopped to prepare burden, turn cam 50 made needle valve be pushed to the left side as far as possible.Spring 55 firmly is placed in the conical segment of path 46 part 51, thereby prevents that water from flowing into 58 li in sack.These water can dilute the thing of sack the inside and hinder later accurate feed proportioning.

When needs are replaced bag 58, end cap 16 and plate 34 are unloaded down from main body 12, then sack 58 is screwed down from supporting base 44.A new sack (same or different additives are housed) is screwed in the supporting base 44, and lid 16 is installed on the main body 12 again.

Interrupted pressure build-up makes the pressure that is added on the sack increase by corresponding mode.Additive will feed out and make part 51 displacements that thereby a flow path that increases area is provided under bigger pressure like this, and this just can obtain the unexpected growth that extra additive compensates flow rate.The position of needle valve is chosen on the position that AFR is provided under the normal condition, and the activity of part 51 is in order to compensate variation.

The embodiment of Fig. 2 is identical in a lot of places with the embodiment of Fig. 1, and the label of same section adds suffix " 1 ".This structure has been cancelled bag 58, and lining 18.1 is own just as the container of material that will be added in the flowing water.Having a stopper 18.2 to press fit over one in the bottom of the lining 18.1 of Fig. 2 charges in the opening.In addition, there is a loosening sheet 18.3 to be clamped in 18.4 li on the cover of circumferential stretching, extension.A thin sheet spring 18.5 is pushed sheet 18.3 to the left side, promptly shifts the closed position onto.The in check water of flow rate flows into lining 18.1 and may be graininess or solid-state additive dissolving along the edge of sheet 18.3, it is being with by path 46.1 current that become a mandarin of going forward side by side.The thin filter screen 46.2 of a slice is being striden outlet and is being provided with to prevent that particle from passing through, in order to avoid disturb the work of valve 48.1.If additive is liquid, it just is sucked out through path 46.1, thereby sheet 18.3 moves to the right side so that water flows in the lining.

In a remodeling, cam 50 and 50.1 and the axle of Qi Lian band replace with a screw with knob, this screw passes an interior screwed hole of a cross that is located at outlet 42 places.The tip of screw or head cooperate with valve head 49,49.1.For ease of accurately adjusting the position of valve, available a series of different screw, the length difference of each screw or head thickness difference.Change flow rate, as long as change a new screw simply.

Fig. 3 illustrates a device to the streaming flow batching, and it comprises one by a cylinder body 64 and the shell that end cap 66 is formed.Body 64 1 ends have an inlet 68, and entering the mouth 68 li has a valve 70.A spring 72 acts on this valve 70.In valve 70 upstreams a manual manipulation valve 74 is arranged, valve 74 is linked on the lever 76, and when lever was pressed towards a fixed component 78, it just opened valve 74.

Three needle valve 80(only see two) be contained in one with axle 84 rotatable control panels 82 coaxial and in aggregates on.Axle 84 is passed in a perforate 86 at end cap 66 centers.A gasket ring is arranged around axle 84, have a control arm 88 to be fixed on axle 84 outer end and radially overhanging.Valve 80 is the structure of the most handy Fig. 4.

Plate 82 has three supporting base 90(that are equivalent to the supporting base 44 of Fig. 1 and Fig. 2 only to see two).Each such supporting base has the sleeve pipe 92 of a bag 94.Have path 96 to draw from each supporting base 90 as can be seen, needle valve 80 controls are by the flow of path 96.Three needle valves 80 and supporting base 90 are round the circular equidistant arrangement of the axis of body 64.

As can be seen, falling into label at the needle valve 80 of " dead point, the end " position is in 98 the outlet and with cam 100 cooperatings.Rotating cam 100 just can allow streaming flow that this valve is opened.The end wall of lid 66 stops two other needle valve to leave the valve seat of path 96.Therefore, when valve 74 is opened, additive just comes up for 94 li from minimum sack.Change another additive, only need come rotor plate 82 just with control arm 88, this just takes another one valve 80 end of to dead-centre position.

As all three valves 80 all tegmentum 66 shut, the water that flows through so just can be equipped with any additive.

When cam was in the position of closing the valve that links to each other with it, the inner face of the end wall of lid 66 was with the cam edge alignment.Each limit of cam is little with the gap of covering between 66 the end wall, and like this, when plate 82 is rotated and cam during in the closed position, the head of valve 80 leaves end cap and moves on on the cam, there is no to move axially vice-versa.

Though in above-mentioned description,, can prepare burden to any other liquid or air with the liquid of water as this device of flowing through.

To air batching and under the cut situation of source of the gas, described various needle valves are with regard to the closed gas flow path and prevent that air from infiltrating in use the sack.If the opinion air infiltrates in the bag, when installing these air of time spent again, this must from bag, discharge, and this just means that additive has postponed outflow, and the air of all infiltrations by the time just begins batching after all getting rid of.Close needle valve and also prevented the leakage of additive.

Claims (10)

1, a kind of device to the streaming flow batching, it comprises a shell (10 with a fluid intake and a fluid issuing, 10.1,62), have in the enclosure and limit a device from the fluid flow path (22) of this this outlet of inlet guiding, in this shell, there is an additive to supply the path (46 of source and course along it from an additive to this fluid flow path, 46.1,96), in this path, there is one to include a control valve (48 that is located at the member (49) in this flow path, 48.1,80), this member is placed to like this, make fluid when this flow path flows, form a pressure differential on this member, actuate this valve towards the direction of opening this path with joint efforts, it is characterized in that this device also is provided with can open the device of mobile distance on the direction (50,52,56) to limit this valve opening the motion on the direction and change this valve from enclosure operation.

2,, it is characterized in that described device (50,52,56) comprises an eccentric wheel (50) from this enclosure energy turn by a kind of device of claim 1.

3, by a kind of device of claim 1, it is characterized in that described valve is the needle valve of a band enlarged head, this head constitutes this member.

4, by a kind of device of claim 3, it is characterized in that described needle valve comprises first and second part (51,53) of telescopic moving relatively, and be provided with a spring (55) and impel these two to push away mutually.

5, a kind of device by claim 1, it is characterized in that described shell is columnar, inlet is at an end of cylindrical housing and export the other end at cylindrical housing, this device comprises that also an arrival end at shell has the cylindrical shape lining (18 of a cross wall (30), 18.1), a cylindrical shape gap (22) that constitutes the some of this flow path is arranged between this shell and this lining, an inlet drilling (32) is arranged on this cross wall, this lining other end is blocked by a plate (34), this piece plate can be unloaded down and be formed with path (46) in plate from lining, and this plate also comprises one in order to a supporting base (44) that is used for containing the contractile thin-walled sack (58) that carries a kind of additive to be installed.

6, press a kind of device of claim 1, it is characterized in that described shell is columnar, inlet is at an end of cylindrical housing and export the other end at cylindrical housing, this device also comprises a cylindrical bush (18.1), the two ends of this neck bush are blocked by cross wall, on the cross wall of shell arrival end, be provided with a check valve that allows fluid can flow into lining (18.3), on the cross wall of the other end of lining, have path (46.1).

7,, it is characterized in that on the cross wall of arrival end, comprising that one charges opening and has a stopper (18.2) to block this and charges opening by a kind of device of claim 6.

8, by a kind of device of claim 1, it is characterized in that comprising an inlet that is located at shell, be used for allowing fluid flow into shell and not allow fluid flow out the check valve (26) of shell by entering the mouth by inlet.

9, by each a kind of device in the claim 1 to 8, it is characterized in that comprising a plurality of paths (96) and a plurality of control valves (80), each path (96) leads to the supporting base of an additive for the source, thereby this shell can be equipped with the source that supplies more than a kind of additive, and be provided with device (82,88) and make other valves keep closing once to bring flow path into selectively simultaneously one in a plurality of valves.

10, by each a kind of device in the claim 1 to 8, it is characterized in that comprising in the enclosure a rotatable plate (82), this plate has a plurality of paths (96) within it, each path is furnished with the flow that a valve (80) is controlled this path of flowing through, this plate also includes supporting base (90) makes the container that fills additive can be installed in this path of aligning on this plate, this plate also is provided with a surface and these valves is remained on the position of closing path, and this plate can rotate so that selected one in these valves is brought into flow path and makes other valves keep closing simultaneously.