DE2454365C2 - Control valve for water softening systems - Google Patents

Description

The invention relates to a control valve for water softening systems according to the preamble of the patent claim. With such a control valve as it is from DE-OS 16 50 567 is known, the slide is designed as a rotatable wheel, wherein the control valve depending on the angular position of the wheel in its normal position or in its regeneration position. An adjusting device is therefore required which causes the angular rotation of the slide. Such an adjusting device requires increased effort, since the angular position of the slide is very precise must be adhered to.

From DE-OS 19 38 047 an actuation of a changeover valve with the aid of a pressure chamber which can be relieved is known. To relieve the pressure chamber is a separate valve is provided, also for the drainage of the saline solution and the subsequent hard Flushing water in the regeneration position of the control valve

The invention has for its object to provide a control valve for water softening systems that is easy to use and requires little construction effort. This task is carried out at solved a control valve of the type mentioned by the characterizing features.

The advantages achievable by the invention are in particular that the auxiliary valve is used to relieve the pressure chamber, d. H. the main valve switches over, and at the same time to drain the saline solution and the subsequent hard rinse water is used.

An exemplary embodiment of the invention is explained below with reference to the drawing. It shows

1 shows the control valve in section in its normal position;

Fig. 2 the control valve in section in its rain

position.

The control valve 5 includes a main body 6, a front and a rear end cover! 7 or 8 and an auxiliary case 9. These components are attached the other by suitable threaded (not shown) fastened fasteners provided namely that

Auxiliary housing 9 on the top of the main body 6

and near the front end cover 7.

These components can either be injection molded

process from a suitable high-strength plastic, e.g. B. the plastic available under the trade name "Noryl", produced or as cast ■ pieces made of one of the corrosion-resistant metals that are usually used for water softening valves

! 5 must be turned. In any case, the main body 6 ^; shaped with a connection nipple 11 which protrudes from its underside and is provided with an external thread 12. which is indicated at 13, are attached. Furthermore, the nipple U is formed with a flange 14, the one Has groove on its underside for receiving an O-ring 15 to the junction between the Seal the nipple 11 and the tank 13.

The main body 6 has a chamber 17 which extends horizontally from the front cover 7 to the outer cover 8 and is closed off by the two covers 7, 8. The front cover 7 is cup-shaped and preferably made of a transparent plastic posed. Its edge is at 18 with the front wall of the Main body 6 sealed and its hollow interior is with an enlarged front part 20 of the chamber 17 in cover and connection. The hollow interior of the front cover 7 is limited a front cylinder 21 and a rear cylinder 22 communicating with each other, the rear cylinder 22 having a larger diameter than that has front cylinder 21, but is coaxial with this.

In the chamber 17, a control slide 24 is back and forth movable forward and extends with a shaft 25 to the front in the larger, rear cylinder 22 in the Cover 7. A stepped piston 26 is fastened to the shaft 25 by a screw connection 27. The end of 28 of smaller diameter of the piston is in the front

Cylinder 21 reciprocable, while the end 29

of larger diameter in rear cylinder 22 is floating.

The cylinders 21, 22 and the stepped piston 26 form

a hydraulic actuator for the spool 24 which can be operated to the spool 24 between its normal position shown in Fig. 1 and its in F i g. 2 to move the regeneration position to and fro. The cylinders 21 and 22 contain normal show hard water of equal pressure so that the the larger end 29 in the cylinder 22 exerted pressure the control slide 24 in its front position (Non painting) holds.

Only if the space in cylinder 22 behind the largest

ren end is depressurized, the pressure acting on the smaller end in cylinder 21 is in the manner effective that the control slide 24 in its in F i g. 2 rear position shown (regeneration position) moved will.

h ^r > The normal position of the control slide 24 is determined by the contact of the larger end 29 on a rearwardly directed annular shoulder 30 on the bottom of the larger cylinder 22. The regeneration

position of the control slide 24 is through the system of a valve disk 32 is determined at its rear end on a forwardly directed annular valve seat 33 which is formed on an inwardly directed extension 34 of the rear cover 8. These Extension 34 is received by an enlarged rear portion 35 of chamber 17.

The slide 24 has a front and a rear web 36 and 37, which are located at the opposite axial ends of a circumferential groove 38 in the slide 24 are located. The webs 36,37 and the groove 38 act to control the connection between a number of Openings and channels of the control valve 5 together, as will be described in more detail below.

The main part 6 is provided with adjacent inlet and outlet openings 40, 41 which are shown in FIG. 1 and 2 for remote side of the control valve 5 for connection to the water connection or service water line (not shown) are open. The inlet opening 40 opens inwardly into the central portion 42 of small diameter of the chamber 17 and is closer to the front than the outlet port 41.

The outlet opening 41 opens inwardly into the chamber 17 at a point which is somewhat in front of the valve seat 33 and in alignment with the wall of an annular slide guide 43 which is supported by an enlarged front portion of the extension 34 at the rear Lid 8 is formed. The rear web 37 of the slide 24 is guided for sliding forward and backward movement within the surrounding wall by the guide 43, openings 44 act in this wall with similar openings 45 in the wall of the cover extension 34 backwards from the valve seat 33 together, a flow of softened water to the outlet port 41 in the manner described in more detail below to enable.

The front cover 7 serves to place another annular slide guide 47 in its position within of the front Kainmer part 20 to hold. The side wall of the further guide 47 surrounds the front web 36 of the slide 24 and has guide system on this and is also provided with a number of openings 48 which connect the central part 42 of the chamber 17 with the enlarged front chamber part 20 when the control slide 24 is in its position in FIG. 1 is the normal position shown.

The body is also provided with first and second tank openings 30 and 51, respectively, which face the underside of the main body 6 are open through the inside of the nipple U through. The first tank opening 50 is directly connected to the enlarged front chamber part 20 in connection, while the second tank opening 51 with the enlarged rear chamber part 35 by a lateral branch 53 of the latter near the bottom of the control valve 5 in connection stands.

This lateral branch 53 of the chamber is limited in part by an inner wall part 54, which extends laterally transversely to it, and by a horizontal wall 55, which is located below the wall part 54 and is provided at the upper end of a connection 56. The bore in the connection 56 forms the second tank opening 5t, which opens up into the lateral branch 53 of the rear chamber part 35 at the top.

The connection 56 dii-'nl for receiving the upper end of the long tube 57, which extends down into the Softening tank 13 essentially to the bottom of the same for embedding in the ion exchange material al that is in this Though not shown, the lower end of the tube is provided with a multitude of narrow slots which prevent the fine beads of the ion exchange material from rials enter together with the softened water during the upward flow of the water in the pipe 57.

The wall 55 and the connection 56 forming the second tank opening 51 are part of a bung-shaped inlet

iu kit, which is fixed inside the nipple 11, However, without impairing the flow through the part of the nipple 11 which forms the first tank opening 50.

The main body 6 is also equipped with an injector opening

tion 60 is provided, which is constantly with the outlet port 41 in communication and with one end opening one Injector 61 can be connected by a line 62. A saline solution inlet port 63 in the center of the rear cover 8 is used to connect to the off leaving the injector 61 through a line 64.

As usual, the injector 61 has a side opening 65, which can be connected to a container or the like with concentrated saline solution, so that saline solution in the injector 61 during the flow hard what sers sucked through the latter and the rear Chamber part 35 is fed through the saline solution · inlet opening 63 in the cover 8.

The auxiliary housing 9 is at the top of the main body 6 immediately above an upwardly open one Cavity 67 attached in this. A bore 68, which leads through the bottom of the cavity 67 to the enlarged front chamber portion 20, cooperates with the cavity 67 to define the inner end portion of a Drainage channel together. The drainage channel extends

j5 through an annular valve seat 69, which is formed in the auxiliary housing 9, upwards and leads to a Discharge opening 70, which leads out laterally from the housing from a vertical recess 71, which to the valve seat 69 is concentric and an outer one

Forms the end part of the diversion channel.

The counterbore 71 is formed at the inner end of a bore 71 ', which is used for the sliding reception of a Shank 72 of an auxiliary valve is used. A plate 73 of the auxiliary valve is located in the cavity 67 and is normally held in contact with the downwardly directed valve seat 69 by a spring 74, whereby the discharge channel is kept separate from the discharge opening 70. The larger cylinder 22 in the front cover 7 is

so both pressurized and relieved by a relief channel 76 in main body 6. The one The end of this relief channel 76 opens into the cavity 67, while the other end with the larger one Cylinder 22 through notches 78 in the front Guide 47 and an annular groove 79 in its circumference Connection.

As a result, the inner end part of the diverting channel, i.e. H. the part that is below the Valve seat 69 is located, constantly with the first Tanköff tion 50 and with the larger cylinder 22 in the front Lid 7 is in communication. In addition, in the normal position of the control slide 24, the pressure of the hard water communicated from the inlet port 40 of the rear of the piston 26 in the cylinder 22, so that the

b ¹ ) slide 24 in its in F i g. 1 is held in the front position (normal position). This is possible because the groove 38 in the slide 24 and the openings 48 in the front guide 47 then establish a connection between

see inlet port 40 and bore 68 at Form the inner end of the discharge channel, while the cavity 67 is a permanent connection between the bore 68 and the relief channel 76 leading to the cylinder 22.

As soon as the plate 73 of the auxiliary valve is lifted from its seat 69, however, the cavity 67 brings the Bore 68, the relief channel 76 and the cylinder 22 with the discharge opening 70 via the recess 71 in the Auxiliary housing 9 in connection. At the same time, of course, the first tank opening 50 also becomes the discharge opening 70 associated.

When the auxiliary valve is open, water can under pressure from the inlet opening 40 into the front end of the smaller one Cylinder 21 in the cover 7 flow to exert a pressure on the front of the piston 26 and thereby the Control slide 24 backwards into its in F i g. 2 Regenerierstel'ung shown to move. Such a current from the water source in the front, smaller cylinder 21 is made by the arrangement of equiaxed Channels 81 and 82 in the control slide 24 or in its shaft 25 allows. The channel 81 empties into it back into the groove 38 in the spool 24 while the channel 82 forward through the stepped piston 26 into the Space in the front cylinder 21 opens in front of the end 28 with the small diameter.

Way of working

The shaft 72 of the auxiliary valve protrudes upward from the Auxiliary housing 9 out to either manual or automatic actuation of the auxiliary valve z. B. middle ice of a time switch indicated at 84 and located on the top of the main body 6 In any case, the auxiliary valve is kept closed as long as the control valve 5 is in the normal position remain

For purposes of explanation, it can be assumed that the first tank opening 50 is with the top of the tank 13 of a softener is connected, while the second tank opening 51 is connected to the lower part of the Tanks 13 is connected by the pipe 57

In the normal position, the rear web 37 sits on the control slide 24 in a U-cup seal Main body 6 and the spool 24 directs incoming hard water from the inlet port 40 to the first Tank opening 50 and down through the bed of ion exchange material in softener tank 13. Soft Water from the lower part of the softening tank 13 flows up into the pipe 57 in the second tank opening 51 and opens into the rear chamber part 35 through its lateral branch 53. This in this way in the Chamber part 35 entering soft water flows forward through the now open valve seat 33 to the outlet opening 41.

At this point, the water pressure at the inlet port 40 in the rear part of the larger cylinder is also increased 22 effective in the cover 7 to hold the control slide 24 in its normal position. Although the injector port 60 is also connected to the rear chamber part 35 during this time, soft flows Water not through the injector 6t, since its outlet end is also in connection with the chamber part 35 stands This means that the injector 61 is ineffective, since the water pressures at its inlet and outlet ends are the same in the normal position of the control slide 24 are.

When the auxiliary valve is operated so that it is lifted from its seat, a regeneration cycle occurs initiated, in which during the time during which the auxiliary valve is open, a delivery with Saline solution and then splinted with a detergent The duration of the supply with saline solution is usually determined by the amount of saline solution available for delivery by the injector 61 and the rinsing process of the cycle follows automatically after the supply of saline solution is switched off has been.

When the auxiliary valve is lifted from its seat, the first tank opening 50 becomes the discharge opening 70 as well as the rear cylinder 22 of larger diameter of the hydraulic actuator in FIG Communicated water from the inlet port 40 then flows into the front cylinder 21, resulting in has that the control slide 24 in its in F i g. 2 shown Regeneration position is moved back.

The web 36 of the control slide sits in this position within another U-cup seal, removing the inlet port 40 from the top of the first Tank opening 50 is separated, while the slide groove 38 connects the inlet opening 40 with the outlet opening 41 connects. This way hard water can add to the.

Get the outlet line during the entire period while the auxiliary valve is kept open will. Furthermore, during this time, the valve disk 32 on the control slide 24 is in contact with its seat 33, whereby outlet port 41 from the large rear chamber part 35 and the lower end of the second Tank opening 51 is disconnected. Water diverted from inlet opening 40 now exits the injector opening 60 out and flows through the injector 61 to the saline solution inlet port 63, so that the saline solution in the through the injector 61 flowing water flow is derived.

The saline solution entering the large chamber part 35 in this way therefore inevitably continues to flow down through the lower end of the second tank opening 51 for the regeneration of the ion exchange material in the Softener 13. The draining saline solution exiting the upper end of the first tank opening 50 through the open auxiliary valve to discharge opening 70.

After a measured amount of saline solution has been delivered through injector 61, the influx of saline solution switched off by the usual float valve in the saline solution tank 13 (not shown) It flows then only clear hard water through injector 61 and into tank 13 for flushing up the ion exchange material. The rinse water, of course, goes to the first tank opening 50 for forwarding to the drain opening 70 returned

The rinsing is ended as soon as the auxiliary valve is closed again. This can be done manually or automatically done under the control of the timer. By closing the auxiliary valve again the upper end of the first tank opening 50 is cut off from the drain opening 70 so that tank water, the exits from the first opening 50 into the bore 68 of the

bo drainage channel, through the cavity 67 and through the Relief duct 76 behind the large diameter rear cylinder 22 of the hydraulic actuator As a result, the control slide 24 is driven back forward into its normal position, in welts rather it remains until the auxiliary valve is actuated and opened again. .;

It should be mentioned here that the actuation of the control slide 24 into or out of its normal position

is facilitated by the arrangement of a relief hole 86 in the front cover 7, which is in the space of the Cylinder 22 opens at a point in front of shoulder 30, which determines the front limit of the slide movement.

For this purpose 2 sheets of drawings

10

15th

20th

25th

J5

45

55

b5

Claims (1)

Claim: Control valve for water softening systems, with a main body having a chamber with a control slide which, in its normal position, has an inlet opening for untreated water connects to a first tank opening and an outlet opening to a second tank opening, with an adjusting device that brings the control slide into its regeneration position, in which it separates the inlet opening from the first tank opening and they with the outlet opening and an injector connects the via a saline solution inlet opening with the second tank opening is connected, and with a drainage opening for the saline solution and the hard rinse water, which is connected to the first tank opening is connectable, characterized in that the control slide (24) is axially movable and provided with webs (36,37) and that the adjusting device controls the spool hydraulically with the help of a relieved pressure chamber (rear cylinder 22) actuated, with the relief of the pressure chamber via a relief channel (76) takes place with the discharge valve (69,72,73,74) is connected to the first tank opening (50) leading channel (67, 68)