DE1914797A1 - Gas fitting for a gas-heated instant water heater - Google Patents

Description

Junkers 462

PLI-Ih / Fi

August 13, 1970

I9U797

P 19 U 797.8 (copy)

JUNKERS & GO. GMBH, in Wernau / Neckar

Gas fitting for a gas-heated instant water heater

The invention relates to a gas fitting for a gas-fired one Continuous water heater, which can be used to release or shut off the gas supply is a closing member of a manually operated gas valve connected to an operating handle via a valve stem has, the axis of which through the axis of a downstream of the closing member and arranged by the low water alarm of the water heater controlled gas safety valve is crossed, whereby the closing element of the manually operated gas valve the passage cross-section to be released is adjustable.

Such gas fittings for gas-heated. Continuous water heater are known in various embodiments (e.g. from German patent specification 1 030 127). Gas fittings are also available thermoelectric ignition safety device and with adjustability of the passage cross-section for the main gas passage by means of a screw-like Stexierkurvenbahn known (German patent specification 1 135 847). There are also Sbeuerkurvenbahnen with a steep incline: for moving a closing link a gas valve in axial calibration known (British patent 674 448). These details are known to each other

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each fulfill a specific purpose, but cannot be used without further ado on a gas valve in which also maintain an optional power control during operation remain. ·

Is therefore to provide a gas valve for a gasbe ¹ -heizten continuous flow water heater, which ensures easy adjustment and sufficient adaptability, despite simple construction object of the invention. ~ ^x

The task is carried out on a gas valve of the type mentioned at the beginning solved according to the invention by combining the following features:

a) the closing element of the manually operated gas valve is via a cam sleeve against the flow direction in axial direction from the off to the ignition position and from there continuously up to a maximum full fire position self-locking movable}

b) is the control cam sleeve coupled to the operating handle guided at least over part of its length in a housing extension with radial play and preferably has two equal

"shaped, mutually offset by 180 ° cam grooves with large Incline to which a ball pin snapper mounted on the housing extension is assigned;

c) the valve stem connecting the cam sleeve with the closing member in one piece is inside a cylindrical one Housing cavity movable, which after the valve seat of the Closing member has a conical expansion;

d) An O-ring is attached to the valve stem in a secured position, but in the closed position of the closing member in the interior of the sesausebohrangg is the position ßoea ifii Ejidbereiöh. -diesel bore -xma in the

ÖQ984S / 0441 ■ '. ·

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Open position is arranged in the area of the conical enlargement. In detail, the arrangement can be made as follows: that for the self-locking movement of the closing link in a Annular groove on the cam sleeve inserted spring ring is provided, which is attached to curved parts protruding beyond the annular groove the unprocessed inner wall of the housing attachment has grinding system and at the same time a centering of the cam sleeve forms. It is preferably provided that the spring ring is designed to be open and in the annular groove with its in the opening direction the trailing end of the control curveMilse is anchored. Furthermore, the design can also be made in such a way that, in order to set the maximum full fire division, an end of the control cam sleeve that is directed towards the operating handle can be screwed on Ring nut is provided, which can be locked in the set position.

In this way, the gas valve is for the manually operated gas valve a gas-heated continuous VJass he heats a very simple one Training created, which by the x ^ foreseen self-locking an optional and reliable setting of the passage cross-section for the main gas quantity and thus for a desired outlet temperature of the heated water results. The cylindrical housing bore with subsequent conical expansion is a special one Main gas valve superfluous, as the O-sealing ring attached to the valve stem has exactly the same effect as an otherwise separately arranged one Provides main gas valve, which requires a corresponding actuation option. In addition, the conical extension and corresponding setting of the on the end of the cam sleeve The screw-on ring nut allows the passage cross-section to be adapted to different types of gas. Furthermore, it is not negligible that the temperature of the outgoing cash register can be continuously adjusted solely by the manually operated gas valve can j without moving another actuator got to. Another advantage arises when installing the gas valve by the fact that, for example, "tolerances arising during manufacture

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be compensated because the positive connection between the valve stem and the cam sleeve serves as compensation within certain limits, so that an adjustment of each individual gas valve is superfluous during assembly.

The subject matter of the invention is based on an exemplary embodiment the drawing explained.

Fig. 1 is a section through the gas fitting of one with schematic lines indicated gas-heated water heater;

Pig. 2 to 4 show the various

Positions of the closing element of the manually operated gas valve according to FIG. 1 in the off, ignition and open positions .

The gas valve according to Figure 1 has a substantially cross-shaped housing 10, in which a hand-operated gas valve generally designated by the reference numeral 11 and a downstream of the same and generally designated by the reference numeral 12 are accommodated, the latter being known per se Way is controlled by a low water alarm 13. The manually operated gas valve 11 has a closing element 11. 1 which is connected to a valve stem 112. The opposite end of the valve stem 112 is non-positively coupled to a cam sleeve 14, which in turn is in a non-positive connection with an operating handle 15. The arrangement of the manually operated gas valve 11 and the gas safety valve 12 within the housing 10 is such that the axis of the manually operated gas valve 11 is crossed by the axis of the gas safety valve 12 controlled by the low water alarm 13. The flow of the water to be heated takes place in a manner known per se from the pipe network indicated by the arrow 16 through part of the water shortage safety device 13 via a pipe 17 to the schematically indicated heat exchanger 18 of the water heater, which

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in a manner known per se from a pipe 17 continuing Pipe coil is penetrated * From the heat exchanger 18, the in this heated water passed through a pipe 19 to a tap 20. To the outlet temperature of the heated water depending to be able to adjust as desired, is that of the closing member 111- des manually operated gas valve 11 to be released passage cross-section adjustable.

For this purpose, it is provided according to the invention ^ that the closing element 111 of the manually operated gas valve 11 via the control cam sleeve ( 14 counter to the direction of flow of the gas in the axial direction from the off to the ignition position and from there continuously to is movable to an adjustable maximum fire position, and although under self-locking, so that for the desired outlet temperature The setting made is retained. The operating handle 15 has a handle neck 151, which on its outer circumference is provided with drivers in the form of axial elevations or recesses, which with corresponding recesses or elevations can be brought into frictional engagement on a sleeve attachment 141 of the cam sleeve 14. Which in this way with the operating handle 15 coupled control cam sleeve 14 is at least guided over part of its length in a housing extension 101 of the housing '10 with radial play and preferably has two uniform, Curved grooves 142 offset by 180 ° with respect to one another and with a steep incline, in each of which a ball pin snapper mounted on the housing extension 101 143 · intervenes. Within an axial recess directed towards the closing element 111 of the manually operated gas valve 11 144 of the cam sleeve 14, a compression spring 113 is pushed onto the valve stem 112 and formed between a spring 113 on the housing 10 Support and an abutment anchored on the valve stem 112 clamped, so that the compression spring 113 as a closing spring for the closing element 111 of the manually operated gas valve 11 acts. Of the the connection between the cam sleeve 14 and the closing member 111 producing the valve stem 112 is within a cylinder » Housing bore movable, which © consists of two parts 102 and 103,

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Within the part 102 of the cylindrical housing bore is the Valve stem 112 sealed to the outside by an O-ring 114-. At the part 103 of the cylindrical housing bore closes after the valve seat 104 for the closing element 11 of the manually operated gas valve 11 to a conical extension 105. It is also attached to the valve stem 112 another O-sealing ring 115 attached in a secured position, which in the closed position of the closing member 111 in the interior of the part 103 of the cylindrical housing bore is arranged. This is in the ignition position of the closing element 111

) O-sealing ring 115 still in the end area of this Tex-i.es 103 of the cylindrical Housing bore, while in the open position of the closing element 111 of the manually operated gas valve 11, this O-sealing ring in the area of the conical enlargement 105 one depending on the one made Adjustment of the operating handle 15 more or less far from the end of the part 103 of the cylindrical housing bore Takes position. To ensure self-locking after setting the desired outlet temperature of the heated Water and the corresponding position of the closing member 111 of the manually operated gas valve 11 is in an annular groove 145 on the Cam sleeve 14 inserted spring ring 146 is provided, which with curved parts protruding outward via the annular groove 145

. the unprocessed inner wall of the housing extension 101 rubbing. System and at the same time forms a centering of the cam sleeve 14 * The self-locking achieved by the spring ring 146 can be further improved if it is designed to be open and anchored in the ring hub 145 with its end trailing in the opening direction of the cam sleeve 14 Maximum full fire position, ie total setting of a maximum permissible value for the passage of gas depending on the conditions at the installation site of the water heater. A corresponding device at dos? Control cam sleeve 14 is provided. For this purpose, on the sleeve extension 141 provided with the Auösengöwinde, the control cam sleeve 14 oino ring opener 147, which in the set position is, for example, islfcftals ainsi? F & h esfeellschraiibe. $ 14

ÖÖ0346 / Ö44? -

OFtfßfNAL INSPECTED

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If the operating handle 15 from the one shown schematically in FIG Off position is rotated counterclockwise into the ignition position shown in Figure 3, there is an axial movement the cam sleeve 14 together with the valve stem 112 and the Closing member 111 of the manually operated gas valve 11 instead, so that the closing member 111 is removed from its valve seat to a corresponding extent 104 is lifted. This allows gas from the inlet port 106 of the housing 10 via the between the closing member 111 and the Valve seat 104 formed gap in the ^ by the conical enlargement 105 formed space, on the wall of which an ignition gas outlet opening 107 is provided, so that ignition gas via an ignition gas line not shown in the drawing to a likewise not flow shown pilot burner and caused to ignite at this can be. In this ignition position, the part 103 of the cylindrical housing bore is still blocked by the O-sealing ring 115, see above that no gas can flow in the direction of the gas safety valve 12 controlled by the low water alarm 13, and thus also the main burner 21 of the water heater has not yet received any gas supply. After the ignition flame has been ignited, the operating handle 15 can be turned counterclockwise further twisted, so üe-ss for example a The open position, shown schematically in FIG. 4, of the closing element 111 of the manually operated gas valve 11 is achieved. In this Position is the O-sealing ring 115 from part 103 of the cylindrical Housing bore emerged and is located in the area of the conical Extension 105 so that according to the setting on the control handle 15 Main gas In the direction of the gas safety valve 12 and, when it is open, to the main burner 21 of the water heater can flow, at which it can flow through the burning pilot flame is ignited. The adjustment made to the operating handle 15 remains due to the self-locking until the next actuation, although the one acting in the closing direction of the closing element 111 Compression spring 113 due to the large slope of the cam grooves 142 on the cam sleeve 14, an influence on the closing member a 111 tried in the closing sense. The gas supply to the main burner 21 of the water heater can optionally except through the from

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the low water alarm 13 controlled gas safety valve still controlled by a further safety valve 22 soft is shown only schematically in Figure 1 and for example can be bimetal controlled in a manner known per se.

0098iss / 0 / -i7

Claims (4)

■■ Junkers 462 claims: 1. Gas fitting for a gas-heated instant water heater, which for releasing or shutting off the gas supply with a control handle has a closing member, connected via a valve stem, of a manually operated gas valve, the axis of which passes through the axis one located downstream of the Sohliessglie & es and from the low water alarm of the water heater controlled gas safety valve is crossed, whereby that of the closing element of the manually operated The passage cross-section to be released by the gas valve is adjustable, characterized by the combination of the following features: a) the closing element (111) of the manually operated gas valve (11) is via a control cam sleeve (14) against the flow direction - direction in the axial direction from the ignition position and from this point it can be moved continuously in a self-locking manner up to an adjustable maximum pre-fire position; b) the control cam sleeve coupled to the operating handle (15) (H) is in a housing approach over at least part of its length (1O1) out with radial play and preferably has two uniform, offset from each other by 180 ° Curve grooves (142) with a large slope, which one on each Housing extension (101) is assigned to mounted ball pin snapper (143); c) of the cam sleeve (14) with the closure member (111) integrally connecting the valve stem (112) is movable within a cylindrical housing bore (102, _103)} which, after the valve seat (104) of the Schiiessgliedes (111) to a conical extension (105 ) having; . - 10 - 009846/0 447 ^ιυ ". Junkers 462 d) an O-sealing ring (115) is secured in position on the valve stem (112) attached, v / elcher in the closed position of the closing element (111) in the inner region of the cylindrical housing bore. (103), in the ignition position still in the end area of this hole (103) and is arranged in the open position in the area of the conical enlargement (105), 2. Gas fitting according to claim 1, characterized in that g e k e η η ζ e i c h net, that for the self-locking movement of the closing link (111) one inserted into an annular groove (14-5) on the control cam sleeve (14) Spring ring (146) is provided which, with curved parts protruding beyond the annular groove (145), rubbing against the unmachined inner wall of the housing extension (101) and at the same time a centering of the cam sleeve (H) forms. 3. Gas fitting according to claim 2, characterized in that the spring ring (146) is openly released. ip the annular groove (145) is anchored with its end trailing in the opening direction of the control cam sleeve (14). 4. Gas fitting according to claim 1, characterized in that that for setting the maximum pre-firing division a towards the end of the directed towards the operating handle (15) Control cam sleeve (14) screw-on ring nut (14T) provided / which can be locked in the set position 9 0 9 8 A b / CK f * 7