EP1025395A1

EP1025395A1 - Gas regulating fixture

Info

Publication number: EP1025395A1
Application number: EP98956853A
Authority: EP
Inventors: Barbara Happe
Original assignee: Mertik Maxitrol GmbH and Co KG
Current assignee: Maxitrol GmbH and Co KG
Priority date: 1997-10-23
Filing date: 1998-10-20
Publication date: 2000-08-09
Anticipated expiration: 2018-10-20
Also published as: WO1999022175A1; ATE214800T1; US6029705A; DE19746788C1; JP4124963B2; KR20010031324A; DK1025395T3; EP1025395B1; ES2173644T3; KR100571097B1; JP2001521134A; HK1031417A1; DE59803463D1; PT1025395E

Abstract

A gas control valve is disclosed which enables a variable adjustment of the gas flows. Furthermore, a remote control may be utilized in conjunction with the gas control valve. The manufacturing expense and the size is kept at the lowest possible minimum. The main valve in the casing is followed by a switch which is known per se and equipped with a springy element and which, in conjunction with two valves, enables a modulating control with jerk-like on/off switching in the partial load range. This switch can be actuated by a tappet which is movable in longitudinal direction and projects beyond the gas-bearing casing to the outside and whose position can be changed by means of an operating element. The operating element can be actuated manually and/or via a driving unit in the form of an electrically driven motor coupled with a battery. The gas control valve for a gas-heated fireplace or similar installation serves the largest possible manipulation of the visible flames, in particular for decorative reasons.

Description

description

Gas control valve

5 Technical field

The invention relates to a gas control valve for a gas-fired stove or the like according to the preamble of the first claim

10 State of the art

Gas control fittings for a gas heating stove or the like are available in a large number of designs. They are used to regulate the gas flow flowing to a burner. For decorative stoves in particular, it is worthwhile for decorative reasons to be able to influence the visible flame. In most cases, for one Frequent adjustment of the unfavorable installation position of the gas control fittings mentioned is generally known to switch the main burner on or off by means of a separate switch

20 A solution in which the main burner is switched on or off by means of a separate switch is described in EP 0 635 680 A1 and illustrated in FIG. 1, even if this involves the use of a thermally controlled switch the ignition flame energy of a second thermocouple used to control a second control valve Die¬

-> ς ses control valve causes the opening and closing of the gas supply to the main burner. To do this, the circuit is opened or closed with the aforementioned thermal switch. It is also possible, as also shown in the above-mentioned European patent application in Fig. 2, to adjust the amount of gas in that a Electromagnet is used, which acts on a pressure regulator With these solutions, it is disadvantageous that the second control valve can only be open or closed. A variable setting of the gas quantity that flows to the main burner is not possible

Furthermore, it is also known that the control of the amount of gas flowing to the main burner takes place in that a direct current magnet acts on the pressure regulator. This enables a variable adjustment of the amount of gas

However, it is disadvantageous here that, due to the required power parameters of the direct current magnet and the necessity that energy is required in every operating state, a power connection and additional components, such as a rectifier, transformer, are absolutely necessary

Another solution is known from electrical gas regulating devices. By using several solenoid valves, intermediate positions can be realized in addition to the on and off positions

As already stated for the solution described above, it is also disadvantageous here that a power connection is required. In addition, it is not possible to operate the gas-fired stove or the like in the event of a power failure

Presentation of the invention

The invention is based on the problem of developing a gas control valve of the type mentioned which has a variable setting of the gas quantity. In particular, the use of a remote control should be made possible for this purpose. The manufacturing effort and the size are to be kept as small as possible

According to the invention, the problem is solved by a one in the housing downstream of the main valve in the flow path of the gas flow for the main burner abrupt switching on and off effecting first valve and a modulating control effecting second valve are arranged, which can be controlled jointly by a switch preloaded by a resilient element in such a way that when the switch is initially actuated, the first valve opens abruptly and during a further adjustment of the switch, the second valve is opened progressively.The switch can be actuated by a slowly moving plunger which protrudes outwards from the housing and the position of which can be changed via an operating element. The operating element is manual and / or by a drive unit in the form of a battery-powered, electrical 10 driven motor can be actuated

Thus, a solution was found with which the previous disadvantage of the prior art, that a variable setting of the gas quantity could not be achieved with a switch without a power connection, was eliminated in that energy was required only when the setting of the gas quantity was changed by the motor , taking into account a reasonable operating time, it was possible to use a battery. Furthermore, this solution is characterized above all by its simplicity and its small size

0 Further advantageous refinements of the invention emerge from the other patent claims. It proves to be particularly advantageous if the operating element which is axially displaceable by rotary movements has a radially arranged toothing in which the motor engages via a transmission gear. The rotary movement is by stops located on the housing limited To prevent overloading of the motor, a slip clutch is arranged between the drive unit and the control element

In order to optimize the adjustment range for setting the amount of gas flowing to the main burner and thus the flame height, it is advantageous if the .o arranged between the operating element and the plunger resilient element consists of at least two spring elements, the spring constant of one spring element being designed so that it is on block length if the Switching path of the switch is in the area of the jump-on switching on and off If, on the other hand, the switching path of the switch is in the area of the modulating control, both spring elements are in their resilient area. A very simple design results if the two spring elements each have one or more disc springs consist

Exemplary embodiment

The invention is described in more detail below using an exemplary embodiment. 0 It shows

1 shows a gas control valve according to the invention in section. FIG. 2 shows a view A of the gas control valve according to the invention. FIG. 3 shows an enlarged view of a switch from the gas control valve according to the invention in section

Fig. 2 is an enlarged view of a spring from the gas control valve according to the invention

The exemplary gas control fitting according to the invention shown in FIG. 1 is a switching and control device which is preferably intended for installation in a gas-fired stove or the like. It enables the burner to be operated and monitored, the pressure control and the flame height adjusted by the end of the flow to the main burner Amount of gas is controlled

-> This gas control valve consists of a die-cast aluminum housing 1 in which the individual functional units, some of which can be operated from the outside using controls 2/3. The housing 1 is composed of an upper part 4 and a lower part 5, between which a flat gasket 6 ensures the external tightness. The position of the separation point is not arbitrary and depends on the design of the functional units

The following functional units are housed in the gas control valve • Commissioning 7 with ignition protection and reclosing control

• Pressure regulator 8

• Control unit 9 for the amount of gas flowing to the main burner

5

For the start-up 7, an actuating rod 10 is rotatable in a bearing point of the upper part 4 and, depending on a guide contour 11, is also mounted so that it can move slowly, the necessary gas tightness being ensured, for example, by a round ring 12

10 operating element 2 firmly connected to the actuating rod 10. The movement in the longitudinal direction is only possible against the force of a return spring 13 supported on the upper part 4. The starting position to be assumed under the force of the return spring 13 is achieved by a transverse pin 14 pressed into the actuating rod 10, which is pressed located inside the housing 1 and in

1 initial position rests against a stop 15 located in the upper part 2. The actuating rod 10 extends with its end into the interior of the lower part 5

On the actuating rod 10, a rotary valve 16, which forms the main valve and is made in connection with openings 19/20 which are explained in more detail below, is guided in rotary direction and is pressed by a spring clip 17 against a sealing surface 18, in each of which an opening 19 for the Main gas flow and an opening 20 for the ignition gas flow is located

The guide contour 11 described above is designed so that

-'s a movement of the actuating rod 10 in its longitudinal direction is only possible if, due to the position of the rotary valve 16, only the opening 20 is open for the ignition gas flow, the minimum size of the opening cross section being dimensioned such that the quantity of ignition gas required for ignition can flow through

.0

Aligned with the rotary slide valve 16 and thus in the extension of the actuating rod 10, the lower part 5 has an opening 21 to an ignition safety valve 22 The ignition safety valve 22 is influenced by a thermoelectric ignition magnet 23 arranged in a gas-tight manner in a bearing of the lower part 5

On the part of the actuating rod 10 protruding into the lower part 5 there is a bracket 24 which is freely movable in the longitudinal direction of the actuating rod 10 but guided in the direction of rotation by the actuating rod 10 and which is supported by a spring 25 which is supported on the rotary valve 16 in the direction of the ignition safety valve 22 The sliding surface 26 formed by the rotary movement of the bow egg 24 in the lower part 5 is interrupted by a groove 27 in which the two ends of the bow egg 24 are located due to the action of the spring 25, when the rotary slide valve 16 is in the upper part 4 located breakthroughs 19/20 for the main gas stream and the ignition gas stream are closed and at the same time the ignition safety valve 22 is in the open position

The bracket 24 furthermore has a tongue 28 projecting axially in the direction of the ignition safety valve 22, the length of which is dimensioned such that when the ignition safety valve 22 is closed and the openings 19/20 are closed, the two ends of the bowel 24 are located outside the groove 27

The mode of operation of the re-switching regulation is as follows. If the ignition gas flow is to be ignited, then the actuating rod 10 is rotated by means of the operating element 2 so far that the opening 20 located in the upper part 4 is sufficiently opened for the ignition gas flow, but the opening 19 is closed for the main gas flow is at the same time an otherwise existing by the guide contour 1 1 lock against low pressure then the actuating rod 10 is printed so far that its end via the ignition safety valve 22 attaches the armature of the ignition safety magnet 23 As illustrated by the flow arrow shown in FIG. 1, the gas flows Via the gas inlet 65 through the open ignition safety valve 22 Through the open opening 20, the ignition gas flows via the ignition outlet 66 to the ignition burner (not shown) and can be ignited. If you let go of the operating handle 2 after a certain time when the ignition safety magnet 23 is energized, the ignition safety valve 22 remains in its position and only the actuating rod 10 slides upwards. A position which is usually called "operational readiness" is reached, in which only

^• > the pilot flame burns

By turning the control element 2 further, the opening 19 for the main gas flow is opened until the maximum opening cross section is present, which is signaled by a stop, with which the so-called “operating position” is reached. It goes without saying that when turning further of the control element 2 in the “operating position” prevents the actuating rod 10 from being pressed down by the guide contour 11 already mentioned above

If the stove is switched off, for which the control element 2 of the gas control valve is turned back to its starting position, which is also signaled by a stop, the opening 19 for the main gas flow and the opening 20 for the ignition gas flow are closed by the rotary valve 16 Opened because excitation ignition safety valve 0 22, the bracket 24 falls with its two ends into the groove 27 and thus prevents the actuation handle 10 from rotating and thus prevents the opening 20 for the ignition gas flow or the opening 19 for the main gas flow through the rotary valve 16 from opening when the ignition safety magnet 23 is no longer energized, the ignition safety valve 22 is closed and the two ends of the bow egg 24 are moved out of the groove 27 via the tongue 28, so that it can be ignited again

In Stromungsnchtuπg behind the commissioning 7, the pressure regulator 8 is arranged. The pressure regulator 8 consists of a gas-tight membrane that is gas-tight around its circumference. In its pot-shaped part there is an externally adjustable pressure spring 30 which counteracts the gas pressure behind a valve plate 31 which acts on the end of the pot-shaped protruding into the housing 1 Part of the membrane 29 is attached. The pressure regulator 8 is set depending on the type of gas used.

Following the pressure regulator 8 there is a switch 33 within the housing 1 (FIG. 3). The switch 33 has a spring spring 48 which is double-slotted on one side and which is supported on the one hand with its two outer ends 49 on the slotted side in a first bearing 50 located in the housing 1, and on the other hand with its non-slotted side 51 is connected to a lyre spring 52, which is supported in a second bearing 53 located in the housing 1. On the side 51 facing the lyre spring 52, a first valve closing body 55 assigned to the first valve 47 is mounted in a first guide bore 54, to which a first valve seat 56 located in the lower part 5 is assigned. Furthermore, on the resilient tongue 57 of the spring 48 located between the two outer ends 49, a second valve closing body 59, which is assigned to the second valve 44 and is located in a second guide bore 58, is mounted, to which a second valve seat 60 located in the lower part 5 is assigned. A lever 62, which is supported in a third bearing 61 in the lower part 5 and is acted upon by the plunger 32, acts on the tongue 57 of the spring 48 with its other end.

The stroke of the switch 33 is determined by the movement of the spring 48 limiting stops 63/64.

The switch 33 is designed in such a way that a modulating control via the valve 44 with an abrupt switching on and off in the partial load range is effected via the valve 47. The partial load flow is limited by an adjustable nozzle 34.

The plunger 32, which is non-positively connected to the switch 33 and moves longitudinally, protrudes from the gas-carrying housing 1 in the upper part 4, which also forms a bearing point for it. The necessary gas tightness is reduced by, for example, a round ring 35. Guaranteed outside. With his At the end facing away from switch 33, the plunger 32 is supported on an intermediate piece 36, which is located in a tubular attachment 37 which is integrally connected to the upper part 5. On its side facing away from the plunger 32, the intermediate piece 36 has a peg-shaped extension which, on the one hand, holds a serves further explained below in more detail resilient element, and on the other hand is guided in a slow motion in a pressure piece 38 which in turn is screwed in a thread located inside the attachment 37. The pressure piece 38 is in turn firmly connected to the control element 3, for example by being pressed in Limitation of the rotary movement of the operating element 3, in conjunction with corresponding shapes of the operating element 3, serves as a stop located on the attachment 37

In this exemplary embodiment, the resilient element consists of five plate springs 39, the spring constant of a plate spring 39 being designed in such a way that this plate spring 39 is maximally compressed, ie is block length, when the switching path of the switch 33 is in the area of the sudden switching on and off If, on the other hand, the switching path of the switch 33 is in the area of the modulating control, all the plate springs 39 are in their resilient area. The "softer" plate spring 39 ensures that the adjustment path is increased, so that a more sensitive adjustment is made possible

The control element 3 has a toothing 40 in the area of its outer circumference, into which a pinion 46 belonging to a transmission gear 41 engages. The transmission gear 41 is coupled to a drive unit 42 fastened to the housing 1, which consists of an electric motor and a battery To prevent the motor, a slip clutch 43 is known between the drive unit 42 and the operating element 3, which is known to the person skilled in the art and is therefore not explained in detail

For switching on and off and for selecting the rotation, the motor is connected via a trunk cable 45 to a commercially available switch or button, not shown The operation of the control unit 9 for the amount of gas flowing to the main burner is as follows

After the ignition gas flow has been ignited by means of the operating element 2, as already explained in detail above, and the “operating position” is established, the main gas flow flows through the opening 19 and the pressure regulator 8 to the switch, as is also illustrated by the flow arrows shown in FIG. 1 33 If the control element 3 is in the minimum position limited by the stop located on the attachment 37, the switch 33 is closed and the main burner is out of operation. If a stove or the like, the flame is now visible at a desired height, in particular for decorative reasons If the motor is actuated via the button or switch connected to the drive unit 42 by means of the remote line cable 45, a rotary movement of the operating element 3 is generated via the pinion 46 of the transmission gear 41, which is effected via pressure piece 38, plate springs 39 and adapter 36 in one Longitudinal movement of the ice cream 32 is converted, which acts on the switch 33

The longitudinal movement of the ice cream 32 causes a rotary movement of the lever 62 mounted in the bearing 61, while the valve 44 remains closed via the tongue 57, under the action of the lyre spring 52 the valve closing body 55 suddenly lifts off from the valve seat 56. The constant, limited by the nozzle 34 The amount of gas flows through the gas outlet 67 to the main burner and is ignited via the pilot flame. The flames burn with a minimum height. When the button or switch is pressed again, the rotary movement of the control element 3 is continued and the flame height is increased evenly, since the lever 62 now controls the flame Tongue 57 is moved in such a way that the valve closing body 59 lifts off the valve seat 60, as a result of which a uniform increase in the amount of gas flowing through the valve 44 is achieved. The switch 33 is now in the modulating range and the valve 44 is opened uniformly until the rotary movement of the operator expansion element 3 is limited by the stop located on the attachment 37. The maximum flame height is reached. When the button or switch is actuated further in the direction of increasing the flame, the slip clutch 43 responds.

Of course, it is also possible that the setting of the flame height can also be carried out by manual actuation of the control element 3 instead of by means of the remote control.

List of reference numbers

Housing 35 round ring

Control element 36 intermediate piece

Control 37 attachment

Upper part 38 printing piece

Lower part 39 disc spring

Flat gasket 40 toothing

Commissioning 41 transmission gear

Pressure regulator 42 drive unit

Control unit 43 slip clutch

Actuating rod 44 second valve

Guide contour 45 remote cable

Round ring 46 pinion

Return spring 47 first valve

Cross pin 48 spring

Stop 49 ends

Rotary valve 50 first bearing

Bow spring 51 page

Sealing surface 52 Lyra spring

Breakthrough 53 second depository

Breakthrough 54 first guide hole

Opening 55 first valve closing body

Ignition fuse valve 56 first valve seat

Ignition safety magnet 57 tongue

Bracket 58 second guide hole

Spring 59 second valve closing body

Sliding surface 60 second valve seat

Nut 61 third bearing

Tongue 62 lever

Membrane 63 first stop Compression spring 64 second stop valve plate 65 gas inlet plunger 66 pilot gas outlet switch 67 gas outlet nozzle

Claims

claims

Gas control valve for a gas-fired stove or the like with a thermostatic ignition safety valve and a manually operated main valve, which are used both for ignition protection and for splitting the

Serve gas flow in portions for the main burner and the pilot burner of the gas-fired stove, and which are accommodated with further, secondary functional elements in a multi-part housing, characterized in that in the housing (1) downstream of the main valve (16-20) in the flow path of the Gas flow for the main burner a step-shaped input and

The first valve (47) causing the switch-off and a second valve (44) causing a modulating control are arranged, which can be controlled together by a switch (33) preloaded by a resilient element (39) such that when the switch (33) is initially actuated the first valve (47) is opened abruptly and, when the switch (33) is adjusted further, the second valve (44) is opened progressively, and that the switch (33) can be actuated by a slow-moving plunger (32) which can be moved out of the housing ( 1) protrudes outwards and its position can be changed via an operating element (3) which can be actuated manually or / and by a drive unit (42) in the form of a battery-powered, electrically driven motor

Gas control valve for a gas-fired stove or the like according to claim 1, characterized in that the rotary movements limited by the stops located on the housing (1) and axially displaceable operating element (3) has a radially arranged toothing (40) into which

Drive unit (42) engages via a transmission gear (41), a slip clutch (43) being arranged between the drive unit (42) and the operating element (3)

Gas control valve for a gas-heated fireplace or the like according to claim 1, characterized in that the resilient element consists of at least two spring elements (39), the spring constant of one Spring element (39) is designed so that it is at block length when the switching path of the switch (33) is in the area of the sudden switching on and off, whereas both spring elements (39) are in their resilient area when the switching path of the switch (33) is located in the area of the modulating control.

4. Gas control valve for a gas-fired stove or the like according to claim 3, characterized in that the two spring elements (39) each consist of one or more disc springs (39).