DE7507119U - Device for controlling and regulating the pressure of a flowing heating gas - Google Patents

Description

KARLSRUHE FfLIX-MCTTL-STRASSt 1 TELEPHONE 590455

R 1530/74 Gbm 1β. February 1975

Reglotech A 0 Friboura (Schumis)

Device for controlling and regulating the pressure of a flowing heating gas

The following is a device for controlling and regulating the pressure of a flowing heating gas, which is alternately fed to a gas burner with two or more different calorific values, with a pressure regulator which contains a pressure or spring-loaded membrane which controls the flow rate of the heating gas actuated directly influencing valve, and a pilot regulator controlling the pressure regulator, the has a pressure-resilient sensing element seated in a housing, which is movable against the force of a spring element supported on an abutment.

The proposed device is used in particular as a pressure regulator for gas combustion devices, as they are widely used for heating purposes of all kinds

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Flawless combustion of a heating gas is particularly important for both atmospheric gas burners and qianz As is well known, blower gas burners are only guaranteed when the gas-air geminch is optimally set:

The optimal setting must also be used for strongly fluctuating The inlet pressure remains in place for the entire duration of a maintenance period of the gas combustion device, but this requirement can only be met with the help of a precisely working pressure regulator and provided that the composition of the heating gas remains constant (i.e. constant calorific value).

Pressure regulators, which can meet the requirement for a very constant output pressure, are known, they are This pressure regulator controlled by a pilot control system «Such pressure regulators are characterized by their characteristic, strong kink in the transition from flow resistance to control behavior, especially in the critical area, namely with minimum inlet pressure, far superior to the other pressure regulators; you can control the outlet pressure with a Keep the tolerance constant, which is smaller than i 5 Ϊ.

With the constantly increasing demand for heating gases, a smooth supply of the consumers is now only possible with a network operation of the supply networks. However, such a network operation means that the calorific value of the heating gases fed into the network differs depending on the feed point; the differences can be up to 20 % . Whether under these conditions the requirements for keeping the air clean (as little soot as possible, low CO content of the exhaust gases) must be met, the optimal setting of the gas-air mixture of a gas burner for the gas should also be

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the highest calorific value; if atvsr then, for example, a gas with a 20% lower calorific value is burned, the combustion takes place with a very high excess of air, that is to say with a considerably reduced degree of efficiency. In this case, the gas burner delivers a heat output that is not only based on the reduced calorific value of the Heating gas, but also drops by the reduced efficiency.

It is known to provide two or more separate pressure regulators for supplying a gas burner, which alternatively, take control of the pressure according to the calorific value of the incoming heating gas; a separate pressure control system is also required for each of these pressure regulators. Accordingly, if a pressure regulator for a heating gas with a high calorific value keeps a low pressure constant, so must - as soon as another heating gas with lower calorific value is delivered - a second, differently adjusted pressure regulator keep a correspondingly higher pressure constant so that the gas burner is in the unit of time receives a larger amount of gas and the excess air does not increase. By the use of two or more pressure control systems, the gas burner not only retains its high efficiency but also its environmentally friendly behavior despite different heating gases.

However, the effort for two or even more pressure regulators with the associated pressure control systems as well as for the unavoidable switching devices is quite considerable, However, as the number of devices has multiplied, the susceptibility to failure and the operational risk of the entire equipment required for controlling and regulating the gas burner, and hler now sets the Innovation a

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The task of the innovation consists in the conception of a Device for controlling and regulating the pressure of a flowing heating gas, which is applied to several different, the pressures to be kept constant can be switched and adjusted and which only have a low structural level Effort required.

To solve this problem , the starting point is a device for controlling and regulating the pressure of the type mentioned, namely a pressure regulator controlled by a pilot regulator, and the object is achieved in that two or more pilot regulators are provided which are set to different pressures and which are connected to They can be set to function as an alternative to controlling the pressure regulator using control valves assigned to them in each case.

Compared to the use of two or more separate pressure regulators with the associated pressure regulating lines and all of its necessary accessories, the previously proposed control of a single pressure regulator by means of several pilot regulators is not only very constructive simple and therefore cheap, but also while maintaining the low safety and operational risk for a single controller possible

However, the problem posed can just as well be achieved in that at least one pilot regulator is used for controlling of the pressure regulator is provided, in which the abutment opposite the sensing element in at least two discrete, locked positions is arranged displaceably. The proposed displacement of the abutment is the Force of the spring element * changes in two or more stages *. so that the new device depending on the position

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the abutment has two or more different pressures can regulate. The advantages achievable here are essentially the same as those described above Solution with several pilot regulators set to different pressures.

The control valves, with which the pilot regulators set to different pressures are activated, are advantageously actuated by electromagnets. This enables the device to be operated remotely.

In a preventive embodiment of the device having a pilot regulator with a displaceable abutment, the abutment is continuously displaceable relative to the sensing element in every discrete, locked position. This additional possibility of displacement allows in a simple manner the precise adjustment of each pressure corresponding to one of the two or more positions.

The abutment is expediently arranged in a head piece which is connected to the housing and in which a guide is provided in which a punch provided with a handle and carrying the abutment can be displaced . The arrangement of the abutment on a displaceable punch enables the necessary displaceability of the abutment in two or more positions in an uncomplicated way.

At least one locking member engages the stamp. The locking member holds the stamp in its intended, the position corresponding to the position of the abutment

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The head piece by means of a thread is advantageous rotatably attached to the housing; this type of fastening also allows adjustment of the first one Position corresponding, lowest pressure.

A rotation lock provided on the head piece prevents unintentional changes to the adjustment made.

To adjust a higher pressure corresponding to a second position, there is a thread in the stamp » bore a lockable with a safety device, penetrating the handle, carrying an external thread, rotatable rod on which the abutment rotates is attached; The safety device serves to prevent the adjustment from being changed.

It can be advantageous if the abutment means a power-operated actuator is displaceable.

Appropriately, the actuator attacks stuck on the handle.

The innovation is explained below with the aid of the accompanying drawings. Show it:

Figure 1 shows a device for controlling and regulating the pressure of a heating gas with a means two differently set pilot regulators, alternatively controlled pressure regulators, in a schematic representation;

FIG. 2 shows a device with one of a pilot regulator with a displaceable abutment controlled pressure regulator, also shown schematically;

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FIG. 3 shows a pilot regulator with a displaceable abutment, in a cross section, the abutment in rearward position;

FIG. 4 shows the Pilct regulator according to FIG. 3, the abutment in the front position, also in a cross-section.

According to FIG. 1, a device for controlling and regulating the pressure of a flowing heating gas consists of a pressure regulator I _9, two pilot regulators 2> ind 3 and a control valve 4.

The pressure regulator 1 has a membrane 5, which through a compression spring 6 is loaded. The membrane 5 actuates a valve 8 via a plunger 7, in which a valve disk 9 cooperates with a valve seat 10. The valve 6 closes one of the gas supply ne * ζ in Connecting inlet stub 11 opposite an outlet stub 12 leading to the gas burner.

From the inlet connection 11 (see FIG. 1) a pressure line 13 leads into the lower pressure regulator chamber 14, from which two control feed lines 15 and 16 lead to the high pressure chambers 18 and 18 of the two pilot regulators 2 and 3. The upper pressure regulator chamber 19 of the pressure regulator 1, in which the compression spring 6 is located, is connected to the outlet connection 12 via an opening 20.

In the pilot regulators 2. 3 is seated in a housing 21 as a sensing element, a membrane 22 which counteracts the force of a Spring 23 is movable, which is supported against a fixed abutment 24. An opening 25 in the low pressure space 26 leads to atmosphere.

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The two high pressure chambers 17 and 18 of the pilot regulators 2 and 3 are connected via two control lines 27 and 28 to the control valve 4 designed as a switching valve, which is actuated by an electromagnet 29. A line 30 is located between the control valve 4 and the outlet connection 12.

Instead of a control fleece designed as a switching valve 4, two separate control valves can just as well be used, each one of the pilot regulators 2, with the help of the control lines 27, 28 is assigned · Owns the proposed device is three or more pilot controllers, so is each of these pilot controllers assigned to a separate control valve.

The device shown in Figure 2 corresponds in principle in structure and function largely to that according to Figure 1, but here the pressure regulator 1 is controlled by a pilot regulator 31, which is opposite the abfOhlorgan has abutment 32 which can be displaced into two discrete, locked positions.

The pilot regulator 31 is shown in detail in FIGS. 3 and 4 on an enlarged scale.

In a two-part housing 33 (FIGS. 3 and 4) sits a flexible, pressure-resilient sensing element in the form of a shape a membrane 34 consisting of a rubber-elastic material, which the housing 33 in a high pressure- Space 35 and a low-pressure space 36 separates the membrane 34 actuates one consisting of an orifice 37 of an inlet line 38 and the membrane middle part 39, the Flow rate of the flowing out through an output line 40 Fuel gas like a valve influencing control

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and control device. The input line 38 tent ait des aee 14 en pressure regulator in connection, see Figure 2.

The diaphragm 34 is movable against the force of a spring element in the form of a spring 41, which the Mem bran 34 a upper diaphragm plate 42 to the mouth 37 of the input line 38 presses, the spring being supported on the abutment 32nd

The abutment 32 is arranged displaceably with respect to the sensing element (the membrane 34) and can assume two discrete positions: a rearward position, shown in FIG. 3, and a front position, shown below in FIG. 4; the adjustment path is denoted by s in FIG. Both in the rear as in the forward position the abutment is locked · 32 Furthermore, the abutment 32 is continuously displaceable in each of these two discrete positions relative to the diaphragm 34th

The abutment 32 is arranged in a cylindrical head piece 43, which by means of a thread 44 is rotatably fastened in the conical part of the housing 33 which forms the low-pressure chamber 36. A grub screw 45, which in the tightened state connects the head piece 43 with the housing, serves as a rotation lock 33 jammed in any position of the parts to one another.

In the head piece 43 there is a centrally arranged one Guide In the form of a square hole 46 in which a square punch 47 is displaceable. By doing

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The punch 47 is seated in a Goewind bore 48 Rod 49 carrying an external thread, at the front end of which the abutment 32 is rotatably fastened with the aid of two locking washers 50.

The punch 47, which can be displaced in the head piece 43, is provided with a hood-shaped handle 51, the punch 47 is welded or otherwise attached to the handle 51, and the rod 49 passes through this handle 51. The rod 49 can be rotated in the threaded bore 48 and can be locked in place with a locking element in the form of a lock nut 52.

A locking element acts on the punch 47, this being a ball 54 pressed into a blind hole against the force of a spring 53, which with a detent 55 in the punch 47 cooperates

The function of the device is as follows. From the entrance- nozzle 11 flows (see. Figure 1) a branched off portion of the heating gas through the pressure line 13 in the pressure regulator chamber 14 of the pressure regulator 1, then moves, c the membrane 5 against the compression spring 6 upwards and lifts by means of of the tappet 7, the valve disk 9 from the valve seat IC. The branched off portion flows through from the pressure regulator chamber 14 the control line 15 only as far into the high-pressure chamber 17 of the pilot regulator 2 as that from the outlet connection 12 there the pressure built up in the control line 27 lifts the membrane 22 against the spring 23; the subset then flows through the Control line 27 and through the control valve 4, which is open in this direction, and through line 30 into the outlet connection 12. The size of the pressure that is used to regulate the heating gas flowing to the gas burner and that builds up in the pressure regulator chamber 14 depends on the amount of gas that the pilot regulator 2 passes through the control line 15 from the pressure regulator

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Room 14 can drain. As long as and thus the first pilot regulator 2 controls the pressure regulator 1, the control valve holds 4 the connection between the control line 28 of the second pilot regulator 3 and the line 30 is closed; however, the second, set to a different pressure, should be used for a heating gas with a different calorific value Pilot controller 3 take control, then this connection is opened and the other connection between the control line 27 and the line 30 are closed; this is done with the aid of the electromagnet 29.

The pilot regulator 31, which is used in the modified device shown in FIG. 2, operates as follows, compare the two FIGS. 3 and The outflowing from the pressure regulator chamber 14 of the pressure regulator 1 Partial amount of the heating gas that is branched off only flows into the high-pressure chamber 35 through the inlet line 38, how it is raised against the force of the spring 41 due to the pressure built up by the outlet line 40 Membrane 34 allows, the membrane middle part 39 more or less exposing the mouth 37 of the input line 38 and allows the partial amount of the heating gas to flow in faster or slower. The Niederdruckrauro 36 is above the Breathing opening in connection with the atmosphere.

In Figure 3, the abutment 32 of the compression spring 41 is in its rearward position, with it over the rear retaining ring 50 rests against the inner end face of the head piece 43 under the action of the spring 41. The pilot regulator 31 is used for controlling and regulating a heating gas with low pressure, i.e. one with a higher calorific value. To adjust the to be controlled (lower) nominal pressure, after loosening the grub screw 45, the head piece 43 is rotated in the thread, wherein the abutment 32 opposite the

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Diaphragm 34 shifted continuously and the tension the spring 41 is changed accordingly until the desired value is reached, then the grub screw 45 serving as a rotation lock is tightened again.

If the pilot controller 31 is now to regulate a heating gas with a higher pressure, in the present case a heating gas with a lower calorific value, then by actuating the Handle 51 of the punch 47 is moved in the direction of the housing 33 until the ball 54 is in the catch 55 intervenes; the abutment 32 of the spring 41 is now in its front position, Figure 4. For Adjusting the now to be regulated (higher) nominal pressure is after loosening the lock nut 52 of the rod 49 rotated with the aid of a screwdriver in the threaded hole 48, so that the abutment 32 seated on the head of the rod 49 is continuously shifted in the direction of the membrane 34 or in the opposite direction until the required value has been reached, and finally the lock nut 52 is tightened again.

If the two nominal pressures to be controlled have been adjusted, see For the transition from one to the other, the simple displacement of the handle 51 is sufficient, which can be done either by hand or with the help of a power-operated actuator (not shown), for example an electromagnet, one Servomotor or a hydraulic device in the form of a connected to a temperature sensor Pressurized can happen.

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18th February 1975

Compilation of the reference numbers used

1 pressure regulator

2 pilot regulators

3 pilot regulators

4 control valve

5 membrane

6 compression spring

7 plungers

8 valve

9 valve disc

10 valve seat

11 inlet connection

12 outlet nozzles

13 Pressure line

14 pressure regulator brown (lower)

15 control line (to 2)

16 control line (to 3)

17 high pressure brown (of 2)

18 high pressure brown (of 3)

19 pressure regulator brown (above)

20 opening

21 housing

22 Membzan

23 spring

24 abutments

25 opening

26 low pressure brown

27 control line (of 2)

28 control line (of 3) 2t electromagnet

30 line

31 pilot regulator

32 abutments

33 housing

34 membrane (sensing element)

35 high pressure brown

36 Hiederdrttekraun

37 mouth

38 input line

39 Heabrsaalttelteii

40 output line

41 spring

42 Menbran plate s adjustment range

43 headjoint

44 thread

45. Madfnnff * "hrwM ^ p (rotation lock)

46 square hole (guide)

47 stamp

43 threaded hole

49 rod

50 backups <the same

51 handle stack

52 lock nut (safety device)

53 spring

54 bullet

55 rest

56 Opening of breath

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Claims (1)

R 1530/74 Gbm - 13 - 18th February 1975 Expectations 1. Device for »controlling and regulating the pressure of a flowing heating gas, which alternates with two or more different calorific values of a gas burner is supplied, with a pressure regulator, the ejjie pressure- or contains a spring-loaded membrane which directly influences the flow rate of the heating gas Valve actuated, and a pilot regulator which controls the pressure regulator, characterized in that two or more different Printed pilot regulators (2, 3) provided are each assigned with the help of them Control valves (4) alternatively to control the pressure » controller (1) can be activated 2 · Device for controlling and regulating the pressure of a flowing heating gas, which alternates with two or several different heat values are fed to a gas burner, old a pressure regulator »which has a pressure or spring-loaded membrane contains which a Flow rate of the hot gas actuated directly influencing valve, and a pilot regulator controlling the pressure regulator, which has a pressure-resilient sensing element seated in a housing, which counteracts the force of a is movable on an abutment supporting Pederelenentes, characterized that at least one pilot controller (32) for controlling the 7507119 10/30/75 1530/74 - 14 - Pressure regulator (1) is provided »in which the abutment (32) opposite the sensing element (34) in at least two discrete, locked positions is slidably arranged. 3. Apparatus according to claim 1, characterized in that the control valves (4) are operated by electromagnets (29). 4. Apparatus according to claim 2, characterized in that the abutment (32) in each of the discrete, locked positions is continuously displaceable with respect to the sensing element (34). 5. Device according to claim 2 and 4, characterized in that the abutment (32) in a head piece (43) connected to the housing (33) is arranged, in which a guide is provided in which a with a handle (51) provided, the Abutment (32) carrying punch (47) is displaceable. 6. Apparatus according to claim 5, characterized in that the stamp (47) at least engages an Arratierorgan (54). 7. Device according to one of claims 5 or 6, characterized in that the Head piece (43) is rotatably attached to the housing (33) by means of a thread (44). 7507119 30.1075 R 1530/74 - 15 - 8. Device according to one of claims 5 to 7, characterized in that a rotation lock (45) is provided on the head piece (43) 9. Device according to one of claims 5 to 8, characterized in that im A punch (47) in a threaded bore (48) with a locking element (52) which can be locked, the handle (51) penetrating, an external thread-bearing, rotatable rod (49) sits on which the abutment (32) rotates is attached. 10. The device according to claim 2, characterized in that the abutment (32) is displaceable by means of a power-operated actuator . 11. Device according to one of claims 5 to 10, characterized in that the actuator engages the handle (51). 7507119 10/30/75